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-rw-r--r--src/core/lib/iomgr/closure.c98
-rw-r--r--src/core/lib/iomgr/closure.h98
-rw-r--r--src/core/lib/iomgr/endpoint.c67
-rw-r--r--src/core/lib/iomgr/endpoint.h102
-rw-r--r--src/core/lib/iomgr/endpoint_pair.h47
-rw-r--r--src/core/lib/iomgr/endpoint_pair_posix.c83
-rw-r--r--src/core/lib/iomgr/endpoint_pair_windows.c97
-rw-r--r--src/core/lib/iomgr/exec_ctx.c151
-rw-r--r--src/core/lib/iomgr/exec_ctx.h98
-rw-r--r--src/core/lib/iomgr/executor.c143
-rw-r--r--src/core/lib/iomgr/executor.h53
-rw-r--r--src/core/lib/iomgr/fd_posix.c454
-rw-r--r--src/core/lib/iomgr/fd_posix.h192
-rw-r--r--src/core/lib/iomgr/iocp_windows.c208
-rw-r--r--src/core/lib/iomgr/iocp_windows.h63
-rw-r--r--src/core/lib/iomgr/iomgr.c175
-rw-r--r--src/core/lib/iomgr/iomgr.h43
-rw-r--r--src/core/lib/iomgr/iomgr_internal.h62
-rw-r--r--src/core/lib/iomgr/iomgr_posix.c52
-rw-r--r--src/core/lib/iomgr/iomgr_posix.h39
-rw-r--r--src/core/lib/iomgr/iomgr_windows.c73
-rw-r--r--src/core/lib/iomgr/pollset.h94
-rw-r--r--src/core/lib/iomgr/pollset_multipoller_with_epoll.c324
-rw-r--r--src/core/lib/iomgr/pollset_multipoller_with_poll_posix.c234
-rw-r--r--src/core/lib/iomgr/pollset_posix.c633
-rw-r--r--src/core/lib/iomgr/pollset_posix.h153
-rw-r--r--src/core/lib/iomgr/pollset_set.h61
-rw-r--r--src/core/lib/iomgr/pollset_set_posix.c202
-rw-r--r--src/core/lib/iomgr/pollset_set_posix.h45
-rw-r--r--src/core/lib/iomgr/pollset_set_windows.c60
-rw-r--r--src/core/lib/iomgr/pollset_set_windows.h39
-rw-r--r--src/core/lib/iomgr/pollset_windows.c240
-rw-r--r--src/core/lib/iomgr/pollset_windows.h75
-rw-r--r--src/core/lib/iomgr/resolve_address.h72
-rw-r--r--src/core/lib/iomgr/resolve_address_posix.c178
-rw-r--r--src/core/lib/iomgr/resolve_address_windows.c169
-rw-r--r--src/core/lib/iomgr/sockaddr.h47
-rw-r--r--src/core/lib/iomgr/sockaddr_posix.h44
-rw-r--r--src/core/lib/iomgr/sockaddr_utils.c227
-rw-r--r--src/core/lib/iomgr/sockaddr_utils.h89
-rw-r--r--src/core/lib/iomgr/sockaddr_win32.h43
-rw-r--r--src/core/lib/iomgr/socket_utils_common_posix.c230
-rw-r--r--src/core/lib/iomgr/socket_utils_linux.c51
-rw-r--r--src/core/lib/iomgr/socket_utils_posix.c70
-rw-r--r--src/core/lib/iomgr/socket_utils_posix.h123
-rw-r--r--src/core/lib/iomgr/socket_windows.c100
-rw-r--r--src/core/lib/iomgr/socket_windows.h111
-rw-r--r--src/core/lib/iomgr/tcp_client.h53
-rw-r--r--src/core/lib/iomgr/tcp_client_posix.c306
-rw-r--r--src/core/lib/iomgr/tcp_client_windows.c221
-rw-r--r--src/core/lib/iomgr/tcp_posix.c493
-rw-r--r--src/core/lib/iomgr/tcp_posix.h71
-rw-r--r--src/core/lib/iomgr/tcp_server.h103
-rw-r--r--src/core/lib/iomgr/tcp_server_posix.c607
-rw-r--r--src/core/lib/iomgr/tcp_server_windows.c557
-rw-r--r--src/core/lib/iomgr/tcp_windows.c402
-rw-r--r--src/core/lib/iomgr/tcp_windows.h57
-rw-r--r--src/core/lib/iomgr/time_averaged_stats.c77
-rw-r--r--src/core/lib/iomgr/time_averaged_stats.h88
-rw-r--r--src/core/lib/iomgr/timer.c356
-rw-r--r--src/core/lib/iomgr/timer.h108
-rw-r--r--src/core/lib/iomgr/timer_heap.c146
-rw-r--r--src/core/lib/iomgr/timer_heap.h57
-rw-r--r--src/core/lib/iomgr/udp_server.c411
-rw-r--r--src/core/lib/iomgr/udp_server.h77
-rw-r--r--src/core/lib/iomgr/unix_sockets_posix.c103
-rw-r--r--src/core/lib/iomgr/unix_sockets_posix.h61
-rw-r--r--src/core/lib/iomgr/unix_sockets_posix_noop.c61
-rw-r--r--src/core/lib/iomgr/wakeup_fd_eventfd.c85
-rw-r--r--src/core/lib/iomgr/wakeup_fd_nospecial.c51
-rw-r--r--src/core/lib/iomgr/wakeup_fd_pipe.c102
-rw-r--r--src/core/lib/iomgr/wakeup_fd_pipe.h41
-rw-r--r--src/core/lib/iomgr/wakeup_fd_posix.c72
-rw-r--r--src/core/lib/iomgr/wakeup_fd_posix.h101
-rw-r--r--src/core/lib/iomgr/workqueue.h83
-rw-r--r--src/core/lib/iomgr/workqueue_posix.c144
-rw-r--r--src/core/lib/iomgr/workqueue_posix.h53
-rw-r--r--src/core/lib/iomgr/workqueue_windows.c40
-rw-r--r--src/core/lib/iomgr/workqueue_windows.h37
79 files changed, 11336 insertions, 0 deletions
diff --git a/src/core/lib/iomgr/closure.c b/src/core/lib/iomgr/closure.c
new file mode 100644
index 0000000000..724ebc284a
--- /dev/null
+++ b/src/core/lib/iomgr/closure.c
@@ -0,0 +1,98 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/iomgr/closure.h"
+
+#include <grpc/support/alloc.h>
+
+void grpc_closure_init(grpc_closure *closure, grpc_iomgr_cb_func cb,
+ void *cb_arg) {
+ closure->cb = cb;
+ closure->cb_arg = cb_arg;
+ closure->final_data = 0;
+}
+
+void grpc_closure_list_add(grpc_closure_list *closure_list,
+ grpc_closure *closure, bool success) {
+ if (closure == NULL) return;
+ closure->final_data = (success != 0);
+ if (closure_list->head == NULL) {
+ closure_list->head = closure;
+ } else {
+ closure_list->tail->final_data |= (uintptr_t)closure;
+ }
+ closure_list->tail = closure;
+}
+
+bool grpc_closure_list_empty(grpc_closure_list closure_list) {
+ return closure_list.head == NULL;
+}
+
+void grpc_closure_list_move(grpc_closure_list *src, grpc_closure_list *dst) {
+ if (src->head == NULL) {
+ return;
+ }
+ if (dst->head == NULL) {
+ *dst = *src;
+ } else {
+ dst->tail->final_data |= (uintptr_t)src->head;
+ dst->tail = src->tail;
+ }
+ src->head = src->tail = NULL;
+}
+
+typedef struct {
+ grpc_iomgr_cb_func cb;
+ void *cb_arg;
+ grpc_closure wrapper;
+} wrapped_closure;
+
+static void closure_wrapper(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
+ wrapped_closure *wc = arg;
+ grpc_iomgr_cb_func cb = wc->cb;
+ void *cb_arg = wc->cb_arg;
+ gpr_free(wc);
+ cb(exec_ctx, cb_arg, success);
+}
+
+grpc_closure *grpc_closure_create(grpc_iomgr_cb_func cb, void *cb_arg) {
+ wrapped_closure *wc = gpr_malloc(sizeof(*wc));
+ wc->cb = cb;
+ wc->cb_arg = cb_arg;
+ grpc_closure_init(&wc->wrapper, closure_wrapper, wc);
+ return &wc->wrapper;
+}
+
+grpc_closure *grpc_closure_next(grpc_closure *closure) {
+ return (grpc_closure *)(closure->final_data & ~(uintptr_t)1);
+}
diff --git a/src/core/lib/iomgr/closure.h b/src/core/lib/iomgr/closure.h
new file mode 100644
index 0000000000..2597cf1706
--- /dev/null
+++ b/src/core/lib/iomgr/closure.h
@@ -0,0 +1,98 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_CLOSURE_H
+#define GRPC_CORE_LIB_IOMGR_CLOSURE_H
+
+#include <grpc/support/port_platform.h>
+#include <stdbool.h>
+
+struct grpc_closure;
+typedef struct grpc_closure grpc_closure;
+
+/* forward declaration for exec_ctx.h */
+struct grpc_exec_ctx;
+typedef struct grpc_exec_ctx grpc_exec_ctx;
+
+typedef struct grpc_closure_list {
+ grpc_closure *head;
+ grpc_closure *tail;
+} grpc_closure_list;
+
+/** gRPC Callback definition.
+ *
+ * \param arg Arbitrary input.
+ * \param success An indication on the state of the iomgr. On false, cleanup
+ * actions should be taken (eg, shutdown). */
+typedef void (*grpc_iomgr_cb_func)(grpc_exec_ctx *exec_ctx, void *arg,
+ bool success);
+
+/** A closure over a grpc_iomgr_cb_func. */
+struct grpc_closure {
+ /** Bound callback. */
+ grpc_iomgr_cb_func cb;
+
+ /** Arguments to be passed to "cb". */
+ void *cb_arg;
+
+ /** Once enqueued, contains in the lower bit the success of the closure,
+ and in the upper bits the pointer to the next closure in the list.
+ Before enqueing for execution, this is usable for scratch data. */
+ uintptr_t final_data;
+};
+
+/** Initializes \a closure with \a cb and \a cb_arg. */
+void grpc_closure_init(grpc_closure *closure, grpc_iomgr_cb_func cb,
+ void *cb_arg);
+
+/* Create a heap allocated closure: try to avoid except for very rare events */
+grpc_closure *grpc_closure_create(grpc_iomgr_cb_func cb, void *cb_arg);
+
+#define GRPC_CLOSURE_LIST_INIT \
+ { NULL, NULL }
+
+/** add \a closure to the end of \a list and set \a closure's success to \a
+ * success */
+void grpc_closure_list_add(grpc_closure_list *list, grpc_closure *closure,
+ bool success);
+
+/** append all closures from \a src to \a dst and empty \a src. */
+void grpc_closure_list_move(grpc_closure_list *src, grpc_closure_list *dst);
+
+/** return whether \a list is empty. */
+bool grpc_closure_list_empty(grpc_closure_list list);
+
+/** return the next pointer for a queued closure list */
+grpc_closure *grpc_closure_next(grpc_closure *closure);
+
+#endif /* GRPC_CORE_LIB_IOMGR_CLOSURE_H */
diff --git a/src/core/lib/iomgr/endpoint.c b/src/core/lib/iomgr/endpoint.c
new file mode 100644
index 0000000000..576b5a6e5c
--- /dev/null
+++ b/src/core/lib/iomgr/endpoint.c
@@ -0,0 +1,67 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/iomgr/endpoint.h"
+
+void grpc_endpoint_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
+ gpr_slice_buffer* slices, grpc_closure* cb) {
+ ep->vtable->read(exec_ctx, ep, slices, cb);
+}
+
+void grpc_endpoint_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
+ gpr_slice_buffer* slices, grpc_closure* cb) {
+ ep->vtable->write(exec_ctx, ep, slices, cb);
+}
+
+void grpc_endpoint_add_to_pollset(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
+ grpc_pollset* pollset) {
+ ep->vtable->add_to_pollset(exec_ctx, ep, pollset);
+}
+
+void grpc_endpoint_add_to_pollset_set(grpc_exec_ctx* exec_ctx,
+ grpc_endpoint* ep,
+ grpc_pollset_set* pollset_set) {
+ ep->vtable->add_to_pollset_set(exec_ctx, ep, pollset_set);
+}
+
+void grpc_endpoint_shutdown(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep) {
+ ep->vtable->shutdown(exec_ctx, ep);
+}
+
+void grpc_endpoint_destroy(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep) {
+ ep->vtable->destroy(exec_ctx, ep);
+}
+
+char* grpc_endpoint_get_peer(grpc_endpoint* ep) {
+ return ep->vtable->get_peer(ep);
+}
diff --git a/src/core/lib/iomgr/endpoint.h b/src/core/lib/iomgr/endpoint.h
new file mode 100644
index 0000000000..918e705fbd
--- /dev/null
+++ b/src/core/lib/iomgr/endpoint.h
@@ -0,0 +1,102 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_ENDPOINT_H
+#define GRPC_CORE_LIB_IOMGR_ENDPOINT_H
+
+#include <grpc/support/slice.h>
+#include <grpc/support/slice_buffer.h>
+#include <grpc/support/time.h>
+#include "src/core/lib/iomgr/pollset.h"
+#include "src/core/lib/iomgr/pollset_set.h"
+
+/* An endpoint caps a streaming channel between two communicating processes.
+ Examples may be: a tcp socket, <stdin+stdout>, or some shared memory. */
+
+typedef struct grpc_endpoint grpc_endpoint;
+typedef struct grpc_endpoint_vtable grpc_endpoint_vtable;
+
+struct grpc_endpoint_vtable {
+ void (*read)(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
+ gpr_slice_buffer *slices, grpc_closure *cb);
+ void (*write)(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
+ gpr_slice_buffer *slices, grpc_closure *cb);
+ void (*add_to_pollset)(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
+ grpc_pollset *pollset);
+ void (*add_to_pollset_set)(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
+ grpc_pollset_set *pollset);
+ void (*shutdown)(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep);
+ void (*destroy)(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep);
+ char *(*get_peer)(grpc_endpoint *ep);
+};
+
+/* When data is available on the connection, calls the callback with slices.
+ Callback success indicates that the endpoint can accept more reads, failure
+ indicates the endpoint is closed.
+ Valid slices may be placed into \a slices even on callback success == 0. */
+void grpc_endpoint_read(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
+ gpr_slice_buffer *slices, grpc_closure *cb);
+
+char *grpc_endpoint_get_peer(grpc_endpoint *ep);
+
+/* Write slices out to the socket.
+
+ If the connection is ready for more data after the end of the call, it
+ returns GRPC_ENDPOINT_DONE.
+ Otherwise it returns GRPC_ENDPOINT_PENDING and calls cb when the
+ connection is ready for more data.
+ \a slices may be mutated at will by the endpoint until cb is called.
+ No guarantee is made to the content of slices after a write EXCEPT that
+ it is a valid slice buffer.
+ */
+void grpc_endpoint_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
+ gpr_slice_buffer *slices, grpc_closure *cb);
+
+/* Causes any pending read/write callbacks to run immediately with
+ success==0 */
+void grpc_endpoint_shutdown(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep);
+void grpc_endpoint_destroy(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep);
+
+/* Add an endpoint to a pollset, so that when the pollset is polled, events from
+ this endpoint are considered */
+void grpc_endpoint_add_to_pollset(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
+ grpc_pollset *pollset);
+void grpc_endpoint_add_to_pollset_set(grpc_exec_ctx *exec_ctx,
+ grpc_endpoint *ep,
+ grpc_pollset_set *pollset_set);
+
+struct grpc_endpoint {
+ const grpc_endpoint_vtable *vtable;
+};
+
+#endif /* GRPC_CORE_LIB_IOMGR_ENDPOINT_H */
diff --git a/src/core/lib/iomgr/endpoint_pair.h b/src/core/lib/iomgr/endpoint_pair.h
new file mode 100644
index 0000000000..bef8bb3518
--- /dev/null
+++ b/src/core/lib/iomgr/endpoint_pair.h
@@ -0,0 +1,47 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_ENDPOINT_PAIR_H
+#define GRPC_CORE_LIB_IOMGR_ENDPOINT_PAIR_H
+
+#include "src/core/lib/iomgr/endpoint.h"
+
+typedef struct {
+ grpc_endpoint *client;
+ grpc_endpoint *server;
+} grpc_endpoint_pair;
+
+grpc_endpoint_pair grpc_iomgr_create_endpoint_pair(const char *name,
+ size_t read_slice_size);
+
+#endif /* GRPC_CORE_LIB_IOMGR_ENDPOINT_PAIR_H */
diff --git a/src/core/lib/iomgr/endpoint_pair_posix.c b/src/core/lib/iomgr/endpoint_pair_posix.c
new file mode 100644
index 0000000000..e0ce47c773
--- /dev/null
+++ b/src/core/lib/iomgr/endpoint_pair_posix.c
@@ -0,0 +1,83 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_POSIX_SOCKET
+
+#include "src/core/lib/iomgr/endpoint_pair.h"
+#include "src/core/lib/iomgr/socket_utils_posix.h"
+#include "src/core/lib/iomgr/unix_sockets_posix.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include "src/core/lib/iomgr/tcp_posix.h"
+#include "src/core/lib/support/string.h"
+
+static void create_sockets(int sv[2]) {
+ int flags;
+ grpc_create_socketpair_if_unix(sv);
+ flags = fcntl(sv[0], F_GETFL, 0);
+ GPR_ASSERT(fcntl(sv[0], F_SETFL, flags | O_NONBLOCK) == 0);
+ flags = fcntl(sv[1], F_GETFL, 0);
+ GPR_ASSERT(fcntl(sv[1], F_SETFL, flags | O_NONBLOCK) == 0);
+ GPR_ASSERT(grpc_set_socket_no_sigpipe_if_possible(sv[0]));
+ GPR_ASSERT(grpc_set_socket_no_sigpipe_if_possible(sv[1]));
+}
+
+grpc_endpoint_pair grpc_iomgr_create_endpoint_pair(const char *name,
+ size_t read_slice_size) {
+ int sv[2];
+ grpc_endpoint_pair p;
+ char *final_name;
+ create_sockets(sv);
+
+ gpr_asprintf(&final_name, "%s:client", name);
+ p.client = grpc_tcp_create(grpc_fd_create(sv[1], final_name), read_slice_size,
+ "socketpair-server");
+ gpr_free(final_name);
+ gpr_asprintf(&final_name, "%s:server", name);
+ p.server = grpc_tcp_create(grpc_fd_create(sv[0], final_name), read_slice_size,
+ "socketpair-client");
+ gpr_free(final_name);
+ return p;
+}
+
+#endif
diff --git a/src/core/lib/iomgr/endpoint_pair_windows.c b/src/core/lib/iomgr/endpoint_pair_windows.c
new file mode 100644
index 0000000000..cba18db81f
--- /dev/null
+++ b/src/core/lib/iomgr/endpoint_pair_windows.c
@@ -0,0 +1,97 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_WINSOCK_SOCKET
+#include "src/core/lib/iomgr/endpoint_pair.h"
+#include "src/core/lib/iomgr/sockaddr_utils.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+
+#include <grpc/support/log.h>
+#include "src/core/lib/iomgr/socket_windows.h"
+#include "src/core/lib/iomgr/tcp_windows.h"
+
+static void create_sockets(SOCKET sv[2]) {
+ SOCKET svr_sock = INVALID_SOCKET;
+ SOCKET lst_sock = INVALID_SOCKET;
+ SOCKET cli_sock = INVALID_SOCKET;
+ SOCKADDR_IN addr;
+ int addr_len = sizeof(addr);
+
+ lst_sock = WSASocket(AF_INET, SOCK_STREAM, IPPROTO_TCP, NULL, 0,
+ WSA_FLAG_OVERLAPPED);
+ GPR_ASSERT(lst_sock != INVALID_SOCKET);
+
+ memset(&addr, 0, sizeof(addr));
+ addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+ addr.sin_family = AF_INET;
+ GPR_ASSERT(bind(lst_sock, (struct sockaddr *)&addr, sizeof(addr)) !=
+ SOCKET_ERROR);
+ GPR_ASSERT(listen(lst_sock, SOMAXCONN) != SOCKET_ERROR);
+ GPR_ASSERT(getsockname(lst_sock, (struct sockaddr *)&addr, &addr_len) !=
+ SOCKET_ERROR);
+
+ cli_sock = WSASocket(AF_INET, SOCK_STREAM, IPPROTO_TCP, NULL, 0,
+ WSA_FLAG_OVERLAPPED);
+ GPR_ASSERT(cli_sock != INVALID_SOCKET);
+
+ GPR_ASSERT(WSAConnect(cli_sock, (struct sockaddr *)&addr, addr_len, NULL,
+ NULL, NULL, NULL) == 0);
+ svr_sock = accept(lst_sock, (struct sockaddr *)&addr, &addr_len);
+ GPR_ASSERT(svr_sock != INVALID_SOCKET);
+
+ closesocket(lst_sock);
+ grpc_tcp_prepare_socket(cli_sock);
+ grpc_tcp_prepare_socket(svr_sock);
+
+ sv[1] = cli_sock;
+ sv[0] = svr_sock;
+}
+
+grpc_endpoint_pair grpc_iomgr_create_endpoint_pair(const char *name,
+ size_t read_slice_size) {
+ SOCKET sv[2];
+ grpc_endpoint_pair p;
+ create_sockets(sv);
+ p.client = grpc_tcp_create(grpc_winsocket_create(sv[1], "endpoint:client"),
+ "endpoint:server");
+ p.server = grpc_tcp_create(grpc_winsocket_create(sv[0], "endpoint:server"),
+ "endpoint:client");
+ return p;
+}
+
+#endif
diff --git a/src/core/lib/iomgr/exec_ctx.c b/src/core/lib/iomgr/exec_ctx.c
new file mode 100644
index 0000000000..1ed6da623a
--- /dev/null
+++ b/src/core/lib/iomgr/exec_ctx.c
@@ -0,0 +1,151 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/iomgr/exec_ctx.h"
+
+#include <grpc/support/log.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/thd.h>
+
+#include "src/core/lib/profiling/timers.h"
+
+#ifndef GRPC_EXECUTION_CONTEXT_SANITIZER
+bool grpc_exec_ctx_flush(grpc_exec_ctx *exec_ctx) {
+ bool did_something = 0;
+ GPR_TIMER_BEGIN("grpc_exec_ctx_flush", 0);
+ while (!grpc_closure_list_empty(exec_ctx->closure_list)) {
+ grpc_closure *c = exec_ctx->closure_list.head;
+ exec_ctx->closure_list.head = exec_ctx->closure_list.tail = NULL;
+ while (c != NULL) {
+ bool success = (bool)(c->final_data & 1);
+ grpc_closure *next = (grpc_closure *)(c->final_data & ~(uintptr_t)1);
+ did_something = true;
+ GPR_TIMER_BEGIN("grpc_exec_ctx_flush.cb", 0);
+ c->cb(exec_ctx, c->cb_arg, success);
+ GPR_TIMER_END("grpc_exec_ctx_flush.cb", 0);
+ c = next;
+ }
+ }
+ GPR_TIMER_END("grpc_exec_ctx_flush", 0);
+ return did_something;
+}
+
+void grpc_exec_ctx_finish(grpc_exec_ctx *exec_ctx) {
+ grpc_exec_ctx_flush(exec_ctx);
+}
+
+void grpc_exec_ctx_enqueue(grpc_exec_ctx *exec_ctx, grpc_closure *closure,
+ bool success,
+ grpc_workqueue *offload_target_or_null) {
+ GPR_ASSERT(offload_target_or_null == NULL);
+ grpc_closure_list_add(&exec_ctx->closure_list, closure, success);
+}
+
+void grpc_exec_ctx_enqueue_list(grpc_exec_ctx *exec_ctx,
+ grpc_closure_list *list,
+ grpc_workqueue *offload_target_or_null) {
+ GPR_ASSERT(offload_target_or_null == NULL);
+ grpc_closure_list_move(list, &exec_ctx->closure_list);
+}
+
+void grpc_exec_ctx_global_init(void) {}
+void grpc_exec_ctx_global_shutdown(void) {}
+#else
+static gpr_mu g_mu;
+static gpr_cv g_cv;
+static int g_threads = 0;
+
+static void run_closure(void *arg) {
+ grpc_closure *closure = arg;
+ grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+ closure->cb(&exec_ctx, closure->cb_arg, (closure->final_data & 1) != 0);
+ grpc_exec_ctx_finish(&exec_ctx);
+ gpr_mu_lock(&g_mu);
+ if (--g_threads == 0) {
+ gpr_cv_signal(&g_cv);
+ }
+ gpr_mu_unlock(&g_mu);
+}
+
+static void start_closure(grpc_closure *closure) {
+ gpr_thd_id id;
+ gpr_mu_lock(&g_mu);
+ g_threads++;
+ gpr_mu_unlock(&g_mu);
+ gpr_thd_new(&id, run_closure, closure, NULL);
+}
+
+bool grpc_exec_ctx_flush(grpc_exec_ctx *exec_ctx) { return false; }
+
+void grpc_exec_ctx_finish(grpc_exec_ctx *exec_ctx) {}
+
+void grpc_exec_ctx_enqueue(grpc_exec_ctx *exec_ctx, grpc_closure *closure,
+ bool success,
+ grpc_workqueue *offload_target_or_null) {
+ GPR_ASSERT(offload_target_or_null == NULL);
+ if (closure == NULL) return;
+ closure->final_data = success;
+ start_closure(closure);
+}
+
+void grpc_exec_ctx_enqueue_list(grpc_exec_ctx *exec_ctx,
+ grpc_closure_list *list,
+ grpc_workqueue *offload_target_or_null) {
+ GPR_ASSERT(offload_target_or_null == NULL);
+ if (list == NULL) return;
+ grpc_closure *p = list->head;
+ while (p) {
+ grpc_closure *start = p;
+ p = grpc_closure_next(start);
+ start_closure(start);
+ }
+ grpc_closure_list r = GRPC_CLOSURE_LIST_INIT;
+ *list = r;
+}
+
+void grpc_exec_ctx_global_init(void) {
+ gpr_mu_init(&g_mu);
+ gpr_cv_init(&g_cv);
+}
+
+void grpc_exec_ctx_global_shutdown(void) {
+ gpr_mu_lock(&g_mu);
+ while (g_threads != 0) {
+ gpr_cv_wait(&g_cv, &g_mu, gpr_inf_future(GPR_CLOCK_REALTIME));
+ }
+ gpr_mu_unlock(&g_mu);
+
+ gpr_mu_destroy(&g_mu);
+ gpr_cv_destroy(&g_cv);
+}
+#endif
diff --git a/src/core/lib/iomgr/exec_ctx.h b/src/core/lib/iomgr/exec_ctx.h
new file mode 100644
index 0000000000..e62ea2dedf
--- /dev/null
+++ b/src/core/lib/iomgr/exec_ctx.h
@@ -0,0 +1,98 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_EXEC_CTX_H
+#define GRPC_CORE_LIB_IOMGR_EXEC_CTX_H
+
+#include "src/core/lib/iomgr/closure.h"
+
+/* #define GRPC_EXECUTION_CONTEXT_SANITIZER 1 */
+
+/** A workqueue represents a list of work to be executed asynchronously.
+ Forward declared here to avoid a circular dependency with workqueue.h. */
+struct grpc_workqueue;
+typedef struct grpc_workqueue grpc_workqueue;
+
+#ifndef GRPC_EXECUTION_CONTEXT_SANITIZER
+/** Execution context.
+ * A bag of data that collects information along a callstack.
+ * Generally created at public API entry points, and passed down as
+ * pointer to child functions that manipulate it.
+ *
+ * Specific responsibilities (this may grow in the future):
+ * - track a list of work that needs to be delayed until the top of the
+ * call stack (this provides a convenient mechanism to run callbacks
+ * without worrying about locking issues)
+ *
+ * CONVENTIONS:
+ * Instance of this must ALWAYS be constructed on the stack, never
+ * heap allocated. Instances and pointers to them must always be called
+ * exec_ctx. Instances are always passed as the first argument
+ * to a function that takes it, and always as a pointer (grpc_exec_ctx
+ * is never copied).
+ */
+struct grpc_exec_ctx {
+ grpc_closure_list closure_list;
+};
+
+#define GRPC_EXEC_CTX_INIT \
+ { GRPC_CLOSURE_LIST_INIT }
+#else
+struct grpc_exec_ctx {
+ int unused;
+};
+#define GRPC_EXEC_CTX_INIT \
+ { 0 }
+#endif
+
+/** Flush any work that has been enqueued onto this grpc_exec_ctx.
+ * Caller must guarantee that no interfering locks are held.
+ * Returns true if work was performed, false otherwise. */
+bool grpc_exec_ctx_flush(grpc_exec_ctx *exec_ctx);
+/** Finish any pending work for a grpc_exec_ctx. Must be called before
+ * the instance is destroyed, or work may be lost. */
+void grpc_exec_ctx_finish(grpc_exec_ctx *exec_ctx);
+/** Add a closure to be executed at the next flush/finish point */
+void grpc_exec_ctx_enqueue(grpc_exec_ctx *exec_ctx, grpc_closure *closure,
+ bool success,
+ grpc_workqueue *offload_target_or_null);
+/** Add a list of closures to be executed at the next flush/finish point.
+ * Leaves \a list empty. */
+void grpc_exec_ctx_enqueue_list(grpc_exec_ctx *exec_ctx,
+ grpc_closure_list *list,
+ grpc_workqueue *offload_target_or_null);
+
+void grpc_exec_ctx_global_init(void);
+void grpc_exec_ctx_global_shutdown(void);
+
+#endif /* GRPC_CORE_LIB_IOMGR_EXEC_CTX_H */
diff --git a/src/core/lib/iomgr/executor.c b/src/core/lib/iomgr/executor.c
new file mode 100644
index 0000000000..42a9db3cbb
--- /dev/null
+++ b/src/core/lib/iomgr/executor.c
@@ -0,0 +1,143 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/iomgr/executor.h"
+
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/thd.h>
+#include "src/core/lib/iomgr/exec_ctx.h"
+
+typedef struct grpc_executor_data {
+ int busy; /**< is the thread currently running? */
+ int shutting_down; /**< has \a grpc_shutdown() been invoked? */
+ int pending_join; /**< has the thread finished but not been joined? */
+ grpc_closure_list closures; /**< collection of pending work */
+ gpr_thd_id tid; /**< thread id of the thread, only valid if \a busy or \a
+ pending_join are true */
+ gpr_thd_options options;
+ gpr_mu mu;
+} grpc_executor;
+
+static grpc_executor g_executor;
+
+void grpc_executor_init() {
+ memset(&g_executor, 0, sizeof(grpc_executor));
+ gpr_mu_init(&g_executor.mu);
+ g_executor.options = gpr_thd_options_default();
+ gpr_thd_options_set_joinable(&g_executor.options);
+}
+
+/* thread body */
+static void closure_exec_thread_func(void *ignored) {
+ grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+ while (1) {
+ gpr_mu_lock(&g_executor.mu);
+ if (g_executor.shutting_down != 0) {
+ gpr_mu_unlock(&g_executor.mu);
+ break;
+ }
+ if (grpc_closure_list_empty(g_executor.closures)) {
+ /* no more work, time to die */
+ GPR_ASSERT(g_executor.busy == 1);
+ g_executor.busy = 0;
+ gpr_mu_unlock(&g_executor.mu);
+ break;
+ } else {
+ grpc_exec_ctx_enqueue_list(&exec_ctx, &g_executor.closures, NULL);
+ }
+ gpr_mu_unlock(&g_executor.mu);
+ grpc_exec_ctx_flush(&exec_ctx);
+ }
+ grpc_exec_ctx_finish(&exec_ctx);
+}
+
+/* Spawn the thread if new work has arrived a no thread is up */
+static void maybe_spawn_locked() {
+ if (grpc_closure_list_empty(g_executor.closures) == 1) {
+ return;
+ }
+ if (g_executor.shutting_down == 1) {
+ return;
+ }
+
+ if (g_executor.busy != 0) {
+ /* Thread still working. New work will be picked up by already running
+ * thread. Not spawning anything. */
+ return;
+ } else if (g_executor.pending_join != 0) {
+ /* Pickup the remains of the previous incarnations of the thread. */
+ gpr_thd_join(g_executor.tid);
+ g_executor.pending_join = 0;
+ }
+
+ /* All previous instances of the thread should have been joined at this point.
+ * Spawn time! */
+ g_executor.busy = 1;
+ gpr_thd_new(&g_executor.tid, closure_exec_thread_func, NULL,
+ &g_executor.options);
+ g_executor.pending_join = 1;
+}
+
+void grpc_executor_enqueue(grpc_closure *closure, bool success) {
+ gpr_mu_lock(&g_executor.mu);
+ if (g_executor.shutting_down == 0) {
+ grpc_closure_list_add(&g_executor.closures, closure, success);
+ maybe_spawn_locked();
+ }
+ gpr_mu_unlock(&g_executor.mu);
+}
+
+void grpc_executor_shutdown() {
+ int pending_join;
+ grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+
+ gpr_mu_lock(&g_executor.mu);
+ pending_join = g_executor.pending_join;
+ g_executor.shutting_down = 1;
+ gpr_mu_unlock(&g_executor.mu);
+ /* we can release the lock at this point despite the access to the closure
+ * list below because we aren't accepting new work */
+
+ /* Execute pending callbacks, some may be performing cleanups */
+ grpc_exec_ctx_enqueue_list(&exec_ctx, &g_executor.closures, NULL);
+ grpc_exec_ctx_finish(&exec_ctx);
+ GPR_ASSERT(grpc_closure_list_empty(g_executor.closures));
+ if (pending_join) {
+ gpr_thd_join(g_executor.tid);
+ }
+ gpr_mu_destroy(&g_executor.mu);
+}
diff --git a/src/core/lib/iomgr/executor.h b/src/core/lib/iomgr/executor.h
new file mode 100644
index 0000000000..f1871416a0
--- /dev/null
+++ b/src/core/lib/iomgr/executor.h
@@ -0,0 +1,53 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_EXECUTOR_H
+#define GRPC_CORE_LIB_IOMGR_EXECUTOR_H
+
+#include "src/core/lib/iomgr/closure.h"
+
+/** Initialize the global executor.
+ *
+ * This mechanism is meant to outsource work (grpc_closure instances) to a
+ * thread, for those cases where blocking isn't an option but there isn't a
+ * non-blocking solution available. */
+void grpc_executor_init();
+
+/** Enqueue \a closure for its eventual execution of \a f(arg) on a separate
+ * thread */
+void grpc_executor_enqueue(grpc_closure *closure, bool success);
+
+/** Shutdown the executor, running all pending work as part of the call */
+void grpc_executor_shutdown();
+
+#endif /* GRPC_CORE_LIB_IOMGR_EXECUTOR_H */
diff --git a/src/core/lib/iomgr/fd_posix.c b/src/core/lib/iomgr/fd_posix.c
new file mode 100644
index 0000000000..72c924bdcb
--- /dev/null
+++ b/src/core/lib/iomgr/fd_posix.c
@@ -0,0 +1,454 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_POSIX_SOCKET
+
+#include "src/core/lib/iomgr/fd_posix.h"
+
+#include <assert.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/useful.h>
+
+#include "src/core/lib/iomgr/pollset_posix.h"
+
+#define CLOSURE_NOT_READY ((grpc_closure *)0)
+#define CLOSURE_READY ((grpc_closure *)1)
+
+/* We need to keep a freelist not because of any concerns of malloc performance
+ * but instead so that implementations with multiple threads in (for example)
+ * epoll_wait deal with the race between pollset removal and incoming poll
+ * notifications.
+ *
+ * The problem is that the poller ultimately holds a reference to this
+ * object, so it is very difficult to know when is safe to free it, at least
+ * without some expensive synchronization.
+ *
+ * If we keep the object freelisted, in the worst case losing this race just
+ * becomes a spurious read notification on a reused fd.
+ */
+/* TODO(klempner): We could use some form of polling generation count to know
+ * when these are safe to free. */
+/* TODO(klempner): Consider disabling freelisting if we don't have multiple
+ * threads in poll on the same fd */
+/* TODO(klempner): Batch these allocations to reduce fragmentation */
+static grpc_fd *fd_freelist = NULL;
+static gpr_mu fd_freelist_mu;
+
+static void freelist_fd(grpc_fd *fd) {
+ gpr_mu_lock(&fd_freelist_mu);
+ fd->freelist_next = fd_freelist;
+ fd_freelist = fd;
+ grpc_iomgr_unregister_object(&fd->iomgr_object);
+ gpr_mu_unlock(&fd_freelist_mu);
+}
+
+static grpc_fd *alloc_fd(int fd) {
+ grpc_fd *r = NULL;
+ gpr_mu_lock(&fd_freelist_mu);
+ if (fd_freelist != NULL) {
+ r = fd_freelist;
+ fd_freelist = fd_freelist->freelist_next;
+ }
+ gpr_mu_unlock(&fd_freelist_mu);
+ if (r == NULL) {
+ r = gpr_malloc(sizeof(grpc_fd));
+ gpr_mu_init(&r->mu);
+ }
+
+ gpr_mu_lock(&r->mu);
+ r->shutdown = 0;
+ r->read_closure = CLOSURE_NOT_READY;
+ r->write_closure = CLOSURE_NOT_READY;
+ r->fd = fd;
+ r->inactive_watcher_root.next = r->inactive_watcher_root.prev =
+ &r->inactive_watcher_root;
+ r->freelist_next = NULL;
+ r->read_watcher = r->write_watcher = NULL;
+ r->on_done_closure = NULL;
+ r->closed = 0;
+ r->released = 0;
+ gpr_atm_rel_store(&r->refst, 1);
+ gpr_mu_unlock(&r->mu);
+
+ return r;
+}
+
+static void destroy(grpc_fd *fd) {
+ gpr_mu_destroy(&fd->mu);
+ gpr_free(fd);
+}
+
+#ifdef GRPC_FD_REF_COUNT_DEBUG
+#define REF_BY(fd, n, reason) ref_by(fd, n, reason, __FILE__, __LINE__)
+#define UNREF_BY(fd, n, reason) unref_by(fd, n, reason, __FILE__, __LINE__)
+static void ref_by(grpc_fd *fd, int n, const char *reason, const char *file,
+ int line) {
+ gpr_log(GPR_DEBUG, "FD %d %p ref %d %d -> %d [%s; %s:%d]", fd->fd, fd, n,
+ gpr_atm_no_barrier_load(&fd->refst),
+ gpr_atm_no_barrier_load(&fd->refst) + n, reason, file, line);
+#else
+#define REF_BY(fd, n, reason) ref_by(fd, n)
+#define UNREF_BY(fd, n, reason) unref_by(fd, n)
+static void ref_by(grpc_fd *fd, int n) {
+#endif
+ GPR_ASSERT(gpr_atm_no_barrier_fetch_add(&fd->refst, n) > 0);
+}
+
+#ifdef GRPC_FD_REF_COUNT_DEBUG
+static void unref_by(grpc_fd *fd, int n, const char *reason, const char *file,
+ int line) {
+ gpr_atm old;
+ gpr_log(GPR_DEBUG, "FD %d %p unref %d %d -> %d [%s; %s:%d]", fd->fd, fd, n,
+ gpr_atm_no_barrier_load(&fd->refst),
+ gpr_atm_no_barrier_load(&fd->refst) - n, reason, file, line);
+#else
+static void unref_by(grpc_fd *fd, int n) {
+ gpr_atm old;
+#endif
+ old = gpr_atm_full_fetch_add(&fd->refst, -n);
+ if (old == n) {
+ freelist_fd(fd);
+ } else {
+ GPR_ASSERT(old > n);
+ }
+}
+
+void grpc_fd_global_init(void) { gpr_mu_init(&fd_freelist_mu); }
+
+void grpc_fd_global_shutdown(void) {
+ gpr_mu_lock(&fd_freelist_mu);
+ gpr_mu_unlock(&fd_freelist_mu);
+ while (fd_freelist != NULL) {
+ grpc_fd *fd = fd_freelist;
+ fd_freelist = fd_freelist->freelist_next;
+ destroy(fd);
+ }
+ gpr_mu_destroy(&fd_freelist_mu);
+}
+
+grpc_fd *grpc_fd_create(int fd, const char *name) {
+ grpc_fd *r = alloc_fd(fd);
+ char *name2;
+ gpr_asprintf(&name2, "%s fd=%d", name, fd);
+ grpc_iomgr_register_object(&r->iomgr_object, name2);
+ gpr_free(name2);
+#ifdef GRPC_FD_REF_COUNT_DEBUG
+ gpr_log(GPR_DEBUG, "FD %d %p create %s", fd, r, name);
+#endif
+ return r;
+}
+
+int grpc_fd_is_orphaned(grpc_fd *fd) {
+ return (gpr_atm_acq_load(&fd->refst) & 1) == 0;
+}
+
+static void pollset_kick_locked(grpc_fd_watcher *watcher) {
+ gpr_mu_lock(&watcher->pollset->mu);
+ GPR_ASSERT(watcher->worker);
+ grpc_pollset_kick_ext(watcher->pollset, watcher->worker,
+ GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP);
+ gpr_mu_unlock(&watcher->pollset->mu);
+}
+
+static void maybe_wake_one_watcher_locked(grpc_fd *fd) {
+ if (fd->inactive_watcher_root.next != &fd->inactive_watcher_root) {
+ pollset_kick_locked(fd->inactive_watcher_root.next);
+ } else if (fd->read_watcher) {
+ pollset_kick_locked(fd->read_watcher);
+ } else if (fd->write_watcher) {
+ pollset_kick_locked(fd->write_watcher);
+ }
+}
+
+static void wake_all_watchers_locked(grpc_fd *fd) {
+ grpc_fd_watcher *watcher;
+ for (watcher = fd->inactive_watcher_root.next;
+ watcher != &fd->inactive_watcher_root; watcher = watcher->next) {
+ pollset_kick_locked(watcher);
+ }
+ if (fd->read_watcher) {
+ pollset_kick_locked(fd->read_watcher);
+ }
+ if (fd->write_watcher && fd->write_watcher != fd->read_watcher) {
+ pollset_kick_locked(fd->write_watcher);
+ }
+}
+
+static int has_watchers(grpc_fd *fd) {
+ return fd->read_watcher != NULL || fd->write_watcher != NULL ||
+ fd->inactive_watcher_root.next != &fd->inactive_watcher_root;
+}
+
+static void close_fd_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
+ fd->closed = 1;
+ if (!fd->released) {
+ close(fd->fd);
+ } else {
+ grpc_remove_fd_from_all_epoll_sets(fd->fd);
+ }
+ grpc_exec_ctx_enqueue(exec_ctx, fd->on_done_closure, true, NULL);
+}
+
+int grpc_fd_wrapped_fd(grpc_fd *fd) {
+ if (fd->released || fd->closed) {
+ return -1;
+ } else {
+ return fd->fd;
+ }
+}
+
+void grpc_fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_closure *on_done,
+ int *release_fd, const char *reason) {
+ fd->on_done_closure = on_done;
+ fd->released = release_fd != NULL;
+ if (!fd->released) {
+ shutdown(fd->fd, SHUT_RDWR);
+ } else {
+ *release_fd = fd->fd;
+ }
+ gpr_mu_lock(&fd->mu);
+ REF_BY(fd, 1, reason); /* remove active status, but keep referenced */
+ if (!has_watchers(fd)) {
+ close_fd_locked(exec_ctx, fd);
+ } else {
+ wake_all_watchers_locked(fd);
+ }
+ gpr_mu_unlock(&fd->mu);
+ UNREF_BY(fd, 2, reason); /* drop the reference */
+}
+
+/* increment refcount by two to avoid changing the orphan bit */
+#ifdef GRPC_FD_REF_COUNT_DEBUG
+void grpc_fd_ref(grpc_fd *fd, const char *reason, const char *file, int line) {
+ ref_by(fd, 2, reason, file, line);
+}
+
+void grpc_fd_unref(grpc_fd *fd, const char *reason, const char *file,
+ int line) {
+ unref_by(fd, 2, reason, file, line);
+}
+#else
+void grpc_fd_ref(grpc_fd *fd) { ref_by(fd, 2); }
+
+void grpc_fd_unref(grpc_fd *fd) { unref_by(fd, 2); }
+#endif
+
+static void notify_on_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+ grpc_closure **st, grpc_closure *closure) {
+ if (*st == CLOSURE_NOT_READY) {
+ /* not ready ==> switch to a waiting state by setting the closure */
+ *st = closure;
+ } else if (*st == CLOSURE_READY) {
+ /* already ready ==> queue the closure to run immediately */
+ *st = CLOSURE_NOT_READY;
+ grpc_exec_ctx_enqueue(exec_ctx, closure, !fd->shutdown, NULL);
+ maybe_wake_one_watcher_locked(fd);
+ } else {
+ /* upcallptr was set to a different closure. This is an error! */
+ gpr_log(GPR_ERROR,
+ "User called a notify_on function with a previous callback still "
+ "pending");
+ abort();
+ }
+}
+
+/* returns 1 if state becomes not ready */
+static int set_ready_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+ grpc_closure **st) {
+ if (*st == CLOSURE_READY) {
+ /* duplicate ready ==> ignore */
+ return 0;
+ } else if (*st == CLOSURE_NOT_READY) {
+ /* not ready, and not waiting ==> flag ready */
+ *st = CLOSURE_READY;
+ return 0;
+ } else {
+ /* waiting ==> queue closure */
+ grpc_exec_ctx_enqueue(exec_ctx, *st, !fd->shutdown, NULL);
+ *st = CLOSURE_NOT_READY;
+ return 1;
+ }
+}
+
+static void set_ready(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_closure **st) {
+ /* only one set_ready can be active at once (but there may be a racing
+ notify_on) */
+ gpr_mu_lock(&fd->mu);
+ set_ready_locked(exec_ctx, fd, st);
+ gpr_mu_unlock(&fd->mu);
+}
+
+void grpc_fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
+ gpr_mu_lock(&fd->mu);
+ GPR_ASSERT(!fd->shutdown);
+ fd->shutdown = 1;
+ set_ready_locked(exec_ctx, fd, &fd->read_closure);
+ set_ready_locked(exec_ctx, fd, &fd->write_closure);
+ gpr_mu_unlock(&fd->mu);
+}
+
+void grpc_fd_notify_on_read(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+ grpc_closure *closure) {
+ gpr_mu_lock(&fd->mu);
+ notify_on_locked(exec_ctx, fd, &fd->read_closure, closure);
+ gpr_mu_unlock(&fd->mu);
+}
+
+void grpc_fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+ grpc_closure *closure) {
+ gpr_mu_lock(&fd->mu);
+ notify_on_locked(exec_ctx, fd, &fd->write_closure, closure);
+ gpr_mu_unlock(&fd->mu);
+}
+
+uint32_t grpc_fd_begin_poll(grpc_fd *fd, grpc_pollset *pollset,
+ grpc_pollset_worker *worker, uint32_t read_mask,
+ uint32_t write_mask, grpc_fd_watcher *watcher) {
+ uint32_t mask = 0;
+ grpc_closure *cur;
+ int requested;
+ /* keep track of pollers that have requested our events, in case they change
+ */
+ GRPC_FD_REF(fd, "poll");
+
+ gpr_mu_lock(&fd->mu);
+
+ /* if we are shutdown, then don't add to the watcher set */
+ if (fd->shutdown) {
+ watcher->fd = NULL;
+ watcher->pollset = NULL;
+ watcher->worker = NULL;
+ gpr_mu_unlock(&fd->mu);
+ GRPC_FD_UNREF(fd, "poll");
+ return 0;
+ }
+
+ /* if there is nobody polling for read, but we need to, then start doing so */
+ cur = fd->read_closure;
+ requested = cur != CLOSURE_READY;
+ if (read_mask && fd->read_watcher == NULL && requested) {
+ fd->read_watcher = watcher;
+ mask |= read_mask;
+ }
+ /* if there is nobody polling for write, but we need to, then start doing so
+ */
+ cur = fd->write_closure;
+ requested = cur != CLOSURE_READY;
+ if (write_mask && fd->write_watcher == NULL && requested) {
+ fd->write_watcher = watcher;
+ mask |= write_mask;
+ }
+ /* if not polling, remember this watcher in case we need someone to later */
+ if (mask == 0 && worker != NULL) {
+ watcher->next = &fd->inactive_watcher_root;
+ watcher->prev = watcher->next->prev;
+ watcher->next->prev = watcher->prev->next = watcher;
+ }
+ watcher->pollset = pollset;
+ watcher->worker = worker;
+ watcher->fd = fd;
+ gpr_mu_unlock(&fd->mu);
+
+ return mask;
+}
+
+void grpc_fd_end_poll(grpc_exec_ctx *exec_ctx, grpc_fd_watcher *watcher,
+ int got_read, int got_write) {
+ int was_polling = 0;
+ int kick = 0;
+ grpc_fd *fd = watcher->fd;
+
+ if (fd == NULL) {
+ return;
+ }
+
+ gpr_mu_lock(&fd->mu);
+
+ if (watcher == fd->read_watcher) {
+ /* remove read watcher, kick if we still need a read */
+ was_polling = 1;
+ if (!got_read) {
+ kick = 1;
+ }
+ fd->read_watcher = NULL;
+ }
+ if (watcher == fd->write_watcher) {
+ /* remove write watcher, kick if we still need a write */
+ was_polling = 1;
+ if (!got_write) {
+ kick = 1;
+ }
+ fd->write_watcher = NULL;
+ }
+ if (!was_polling && watcher->worker != NULL) {
+ /* remove from inactive list */
+ watcher->next->prev = watcher->prev;
+ watcher->prev->next = watcher->next;
+ }
+ if (got_read) {
+ if (set_ready_locked(exec_ctx, fd, &fd->read_closure)) {
+ kick = 1;
+ }
+ }
+ if (got_write) {
+ if (set_ready_locked(exec_ctx, fd, &fd->write_closure)) {
+ kick = 1;
+ }
+ }
+ if (kick) {
+ maybe_wake_one_watcher_locked(fd);
+ }
+ if (grpc_fd_is_orphaned(fd) && !has_watchers(fd) && !fd->closed) {
+ close_fd_locked(exec_ctx, fd);
+ }
+ gpr_mu_unlock(&fd->mu);
+
+ GRPC_FD_UNREF(fd, "poll");
+}
+
+void grpc_fd_become_readable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
+ set_ready(exec_ctx, fd, &fd->read_closure);
+}
+
+void grpc_fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
+ set_ready(exec_ctx, fd, &fd->write_closure);
+}
+
+#endif
diff --git a/src/core/lib/iomgr/fd_posix.h b/src/core/lib/iomgr/fd_posix.h
new file mode 100644
index 0000000000..69d09ef5e3
--- /dev/null
+++ b/src/core/lib/iomgr/fd_posix.h
@@ -0,0 +1,192 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_FD_POSIX_H
+#define GRPC_CORE_LIB_IOMGR_FD_POSIX_H
+
+#include <grpc/support/atm.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/time.h>
+#include "src/core/lib/iomgr/iomgr_internal.h"
+#include "src/core/lib/iomgr/pollset.h"
+
+typedef struct grpc_fd grpc_fd;
+
+typedef struct grpc_fd_watcher {
+ struct grpc_fd_watcher *next;
+ struct grpc_fd_watcher *prev;
+ grpc_pollset *pollset;
+ grpc_pollset_worker *worker;
+ grpc_fd *fd;
+} grpc_fd_watcher;
+
+struct grpc_fd {
+ int fd;
+ /* refst format:
+ bit0: 1=active/0=orphaned
+ bit1-n: refcount
+ meaning that mostly we ref by two to avoid altering the orphaned bit,
+ and just unref by 1 when we're ready to flag the object as orphaned */
+ gpr_atm refst;
+
+ gpr_mu mu;
+ int shutdown;
+ int closed;
+ int released;
+
+ /* The watcher list.
+
+ The following watcher related fields are protected by watcher_mu.
+
+ An fd_watcher is an ephemeral object created when an fd wants to
+ begin polling, and destroyed after the poll.
+
+ It denotes the fd's interest in whether to read poll or write poll
+ or both or neither on this fd.
+
+ If a watcher is asked to poll for reads or writes, the read_watcher
+ or write_watcher fields are set respectively. A watcher may be asked
+ to poll for both, in which case both fields will be set.
+
+ read_watcher and write_watcher may be NULL if no watcher has been
+ asked to poll for reads or writes.
+
+ If an fd_watcher is not asked to poll for reads or writes, it's added
+ to a linked list of inactive watchers, rooted at inactive_watcher_root.
+ If at a later time there becomes need of a poller to poll, one of
+ the inactive pollers may be kicked out of their poll loops to take
+ that responsibility. */
+ grpc_fd_watcher inactive_watcher_root;
+ grpc_fd_watcher *read_watcher;
+ grpc_fd_watcher *write_watcher;
+
+ grpc_closure *read_closure;
+ grpc_closure *write_closure;
+
+ struct grpc_fd *freelist_next;
+
+ grpc_closure *on_done_closure;
+
+ grpc_iomgr_object iomgr_object;
+};
+
+/* Create a wrapped file descriptor.
+ Requires fd is a non-blocking file descriptor.
+ This takes ownership of closing fd. */
+grpc_fd *grpc_fd_create(int fd, const char *name);
+
+/* Return the wrapped fd, or -1 if it has been released or closed. */
+int grpc_fd_wrapped_fd(grpc_fd *fd);
+
+/* Releases fd to be asynchronously destroyed.
+ on_done is called when the underlying file descriptor is definitely close()d.
+ If on_done is NULL, no callback will be made.
+ If release_fd is not NULL, it's set to fd and fd will not be closed.
+ Requires: *fd initialized; no outstanding notify_on_read or
+ notify_on_write.
+ MUST NOT be called with a pollset lock taken */
+void grpc_fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_closure *on_done,
+ int *release_fd, const char *reason);
+
+/* Begin polling on an fd.
+ Registers that the given pollset is interested in this fd - so that if read
+ or writability interest changes, the pollset can be kicked to pick up that
+ new interest.
+ Return value is:
+ (fd_needs_read? read_mask : 0) | (fd_needs_write? write_mask : 0)
+ i.e. a combination of read_mask and write_mask determined by the fd's current
+ interest in said events.
+ Polling strategies that do not need to alter their behavior depending on the
+ fd's current interest (such as epoll) do not need to call this function.
+ MUST NOT be called with a pollset lock taken */
+uint32_t grpc_fd_begin_poll(grpc_fd *fd, grpc_pollset *pollset,
+ grpc_pollset_worker *worker, uint32_t read_mask,
+ uint32_t write_mask, grpc_fd_watcher *rec);
+/* Complete polling previously started with grpc_fd_begin_poll
+ MUST NOT be called with a pollset lock taken
+ if got_read or got_write are 1, also does the become_{readable,writable} as
+ appropriate. */
+void grpc_fd_end_poll(grpc_exec_ctx *exec_ctx, grpc_fd_watcher *rec,
+ int got_read, int got_write);
+
+/* Return 1 if this fd is orphaned, 0 otherwise */
+int grpc_fd_is_orphaned(grpc_fd *fd);
+
+/* Cause any current callbacks to error out with GRPC_CALLBACK_CANCELLED. */
+void grpc_fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd);
+
+/* Register read interest, causing read_cb to be called once when fd becomes
+ readable, on deadline specified by deadline, or on shutdown triggered by
+ grpc_fd_shutdown.
+ read_cb will be called with read_cb_arg when *fd becomes readable.
+ read_cb is Called with status of GRPC_CALLBACK_SUCCESS if readable,
+ GRPC_CALLBACK_TIMED_OUT if the call timed out,
+ and CANCELLED if the call was cancelled.
+
+ Requires:This method must not be called before the read_cb for any previous
+ call runs. Edge triggered events are used whenever they are supported by the
+ underlying platform. This means that users must drain fd in read_cb before
+ calling notify_on_read again. Users are also expected to handle spurious
+ events, i.e read_cb is called while nothing can be readable from fd */
+void grpc_fd_notify_on_read(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+ grpc_closure *closure);
+
+/* Exactly the same semantics as above, except based on writable events. */
+void grpc_fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+ grpc_closure *closure);
+
+/* Notification from the poller to an fd that it has become readable or
+ writable.
+ If allow_synchronous_callback is 1, allow running the fd callback inline
+ in this callstack, otherwise register an asynchronous callback and return */
+void grpc_fd_become_readable(grpc_exec_ctx *exec_ctx, grpc_fd *fd);
+void grpc_fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd);
+
+/* Reference counting for fds */
+/*#define GRPC_FD_REF_COUNT_DEBUG*/
+#ifdef GRPC_FD_REF_COUNT_DEBUG
+void grpc_fd_ref(grpc_fd *fd, const char *reason, const char *file, int line);
+void grpc_fd_unref(grpc_fd *fd, const char *reason, const char *file, int line);
+#define GRPC_FD_REF(fd, reason) grpc_fd_ref(fd, reason, __FILE__, __LINE__)
+#define GRPC_FD_UNREF(fd, reason) grpc_fd_unref(fd, reason, __FILE__, __LINE__)
+#else
+void grpc_fd_ref(grpc_fd *fd);
+void grpc_fd_unref(grpc_fd *fd);
+#define GRPC_FD_REF(fd, reason) grpc_fd_ref(fd)
+#define GRPC_FD_UNREF(fd, reason) grpc_fd_unref(fd)
+#endif
+
+void grpc_fd_global_init(void);
+void grpc_fd_global_shutdown(void);
+
+#endif /* GRPC_CORE_LIB_IOMGR_FD_POSIX_H */
diff --git a/src/core/lib/iomgr/iocp_windows.c b/src/core/lib/iomgr/iocp_windows.c
new file mode 100644
index 0000000000..682a32c0da
--- /dev/null
+++ b/src/core/lib/iomgr/iocp_windows.c
@@ -0,0 +1,208 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_WINSOCK_SOCKET
+
+#include <winsock2.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/log_win32.h>
+#include <grpc/support/thd.h>
+
+#include "src/core/lib/iomgr/iocp_windows.h"
+#include "src/core/lib/iomgr/iomgr_internal.h"
+#include "src/core/lib/iomgr/socket_windows.h"
+#include "src/core/lib/iomgr/timer.h"
+
+static ULONG g_iocp_kick_token;
+static OVERLAPPED g_iocp_custom_overlap;
+
+static gpr_atm g_custom_events = 0;
+
+static HANDLE g_iocp;
+
+static DWORD deadline_to_millis_timeout(gpr_timespec deadline,
+ gpr_timespec now) {
+ gpr_timespec timeout;
+ static const int64_t max_spin_polling_us = 10;
+ if (gpr_time_cmp(deadline, gpr_inf_future(deadline.clock_type)) == 0) {
+ return INFINITE;
+ }
+ if (gpr_time_cmp(deadline, gpr_time_add(now, gpr_time_from_micros(
+ max_spin_polling_us,
+ GPR_TIMESPAN))) <= 0) {
+ return 0;
+ }
+ timeout = gpr_time_sub(deadline, now);
+ return (DWORD)gpr_time_to_millis(gpr_time_add(
+ timeout, gpr_time_from_nanos(GPR_NS_PER_MS - 1, GPR_TIMESPAN)));
+}
+
+grpc_iocp_work_status grpc_iocp_work(grpc_exec_ctx *exec_ctx,
+ gpr_timespec deadline) {
+ BOOL success;
+ DWORD bytes = 0;
+ DWORD flags = 0;
+ ULONG_PTR completion_key;
+ LPOVERLAPPED overlapped;
+ grpc_winsocket *socket;
+ grpc_winsocket_callback_info *info;
+ grpc_closure *closure = NULL;
+ success = GetQueuedCompletionStatus(
+ g_iocp, &bytes, &completion_key, &overlapped,
+ deadline_to_millis_timeout(deadline, gpr_now(deadline.clock_type)));
+ if (success == 0 && overlapped == NULL) {
+ return GRPC_IOCP_WORK_TIMEOUT;
+ }
+ GPR_ASSERT(completion_key && overlapped);
+ if (overlapped == &g_iocp_custom_overlap) {
+ gpr_atm_full_fetch_add(&g_custom_events, -1);
+ if (completion_key == (ULONG_PTR)&g_iocp_kick_token) {
+ /* We were awoken from a kick. */
+ return GRPC_IOCP_WORK_KICK;
+ }
+ gpr_log(GPR_ERROR, "Unknown custom completion key.");
+ abort();
+ }
+
+ socket = (grpc_winsocket *)completion_key;
+ if (overlapped == &socket->write_info.overlapped) {
+ info = &socket->write_info;
+ } else if (overlapped == &socket->read_info.overlapped) {
+ info = &socket->read_info;
+ } else {
+ gpr_log(GPR_ERROR, "Unknown IOCP operation");
+ abort();
+ }
+ success = WSAGetOverlappedResult(socket->socket, &info->overlapped, &bytes,
+ FALSE, &flags);
+ info->bytes_transfered = bytes;
+ info->wsa_error = success ? 0 : WSAGetLastError();
+ GPR_ASSERT(overlapped == &info->overlapped);
+ GPR_ASSERT(!info->has_pending_iocp);
+ gpr_mu_lock(&socket->state_mu);
+ if (info->closure) {
+ closure = info->closure;
+ info->closure = NULL;
+ } else {
+ info->has_pending_iocp = 1;
+ }
+ gpr_mu_unlock(&socket->state_mu);
+ grpc_exec_ctx_enqueue(exec_ctx, closure, true, NULL);
+ return GRPC_IOCP_WORK_WORK;
+}
+
+void grpc_iocp_init(void) {
+ g_iocp =
+ CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, (ULONG_PTR)NULL, 0);
+ GPR_ASSERT(g_iocp);
+}
+
+void grpc_iocp_kick(void) {
+ BOOL success;
+
+ gpr_atm_full_fetch_add(&g_custom_events, 1);
+ success = PostQueuedCompletionStatus(g_iocp, 0, (ULONG_PTR)&g_iocp_kick_token,
+ &g_iocp_custom_overlap);
+ GPR_ASSERT(success);
+}
+
+void grpc_iocp_flush(void) {
+ grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+ grpc_iocp_work_status work_status;
+
+ do {
+ work_status = grpc_iocp_work(&exec_ctx, gpr_inf_past(GPR_CLOCK_MONOTONIC));
+ } while (work_status == GRPC_IOCP_WORK_KICK ||
+ grpc_exec_ctx_flush(&exec_ctx));
+}
+
+void grpc_iocp_shutdown(void) {
+ grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+ while (gpr_atm_acq_load(&g_custom_events)) {
+ grpc_iocp_work(&exec_ctx, gpr_inf_future(GPR_CLOCK_MONOTONIC));
+ grpc_exec_ctx_flush(&exec_ctx);
+ }
+ grpc_exec_ctx_finish(&exec_ctx);
+ GPR_ASSERT(CloseHandle(g_iocp));
+}
+
+void grpc_iocp_add_socket(grpc_winsocket *socket) {
+ HANDLE ret;
+ if (socket->added_to_iocp) return;
+ ret = CreateIoCompletionPort((HANDLE)socket->socket, g_iocp,
+ (uintptr_t)socket, 0);
+ if (!ret) {
+ char *utf8_message = gpr_format_message(WSAGetLastError());
+ gpr_log(GPR_ERROR, "Unable to add socket to iocp: %s", utf8_message);
+ gpr_free(utf8_message);
+ __debugbreak();
+ abort();
+ }
+ socket->added_to_iocp = 1;
+ GPR_ASSERT(ret == g_iocp);
+}
+
+/* Calling notify_on_read or write means either of two things:
+ -) The IOCP already completed in the background, and we need to call
+ the callback now.
+ -) The IOCP hasn't completed yet, and we're queuing it for later. */
+static void socket_notify_on_iocp(grpc_exec_ctx *exec_ctx,
+ grpc_winsocket *socket, grpc_closure *closure,
+ grpc_winsocket_callback_info *info) {
+ GPR_ASSERT(info->closure == NULL);
+ gpr_mu_lock(&socket->state_mu);
+ if (info->has_pending_iocp) {
+ info->has_pending_iocp = 0;
+ grpc_exec_ctx_enqueue(exec_ctx, closure, true, NULL);
+ } else {
+ info->closure = closure;
+ }
+ gpr_mu_unlock(&socket->state_mu);
+}
+
+void grpc_socket_notify_on_write(grpc_exec_ctx *exec_ctx,
+ grpc_winsocket *socket,
+ grpc_closure *closure) {
+ socket_notify_on_iocp(exec_ctx, socket, closure, &socket->write_info);
+}
+
+void grpc_socket_notify_on_read(grpc_exec_ctx *exec_ctx, grpc_winsocket *socket,
+ grpc_closure *closure) {
+ socket_notify_on_iocp(exec_ctx, socket, closure, &socket->read_info);
+}
+
+#endif /* GPR_WINSOCK_SOCKET */
diff --git a/src/core/lib/iomgr/iocp_windows.h b/src/core/lib/iomgr/iocp_windows.h
new file mode 100644
index 0000000000..856c837fb4
--- /dev/null
+++ b/src/core/lib/iomgr/iocp_windows.h
@@ -0,0 +1,63 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_IOCP_WINDOWS_H
+#define GRPC_CORE_LIB_IOMGR_IOCP_WINDOWS_H
+
+#include <grpc/support/sync.h>
+
+#include "src/core/lib/iomgr/socket_windows.h"
+
+typedef enum {
+ GRPC_IOCP_WORK_WORK,
+ GRPC_IOCP_WORK_TIMEOUT,
+ GRPC_IOCP_WORK_KICK
+} grpc_iocp_work_status;
+
+grpc_iocp_work_status grpc_iocp_work(grpc_exec_ctx *exec_ctx,
+ gpr_timespec deadline);
+void grpc_iocp_init(void);
+void grpc_iocp_kick(void);
+void grpc_iocp_flush(void);
+void grpc_iocp_shutdown(void);
+void grpc_iocp_add_socket(grpc_winsocket *);
+
+void grpc_socket_notify_on_write(grpc_exec_ctx *exec_ctx,
+ grpc_winsocket *winsocket,
+ grpc_closure *closure);
+
+void grpc_socket_notify_on_read(grpc_exec_ctx *exec_ctx,
+ grpc_winsocket *winsocket,
+ grpc_closure *closure);
+
+#endif /* GRPC_CORE_LIB_IOMGR_IOCP_WINDOWS_H */
diff --git a/src/core/lib/iomgr/iomgr.c b/src/core/lib/iomgr/iomgr.c
new file mode 100644
index 0000000000..bb544c8280
--- /dev/null
+++ b/src/core/lib/iomgr/iomgr.c
@@ -0,0 +1,175 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/iomgr/iomgr.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/thd.h>
+#include <grpc/support/useful.h>
+
+#include "src/core/lib/iomgr/exec_ctx.h"
+#include "src/core/lib/iomgr/iomgr_internal.h"
+#include "src/core/lib/iomgr/timer.h"
+#include "src/core/lib/support/env.h"
+#include "src/core/lib/support/string.h"
+
+static gpr_mu g_mu;
+static gpr_cv g_rcv;
+static int g_shutdown;
+static grpc_iomgr_object g_root_object;
+
+void grpc_iomgr_init(void) {
+ g_shutdown = 0;
+ gpr_mu_init(&g_mu);
+ gpr_cv_init(&g_rcv);
+ grpc_exec_ctx_global_init();
+ grpc_timer_list_init(gpr_now(GPR_CLOCK_MONOTONIC));
+ g_root_object.next = g_root_object.prev = &g_root_object;
+ g_root_object.name = "root";
+ grpc_iomgr_platform_init();
+ grpc_pollset_global_init();
+}
+
+static size_t count_objects(void) {
+ grpc_iomgr_object *obj;
+ size_t n = 0;
+ for (obj = g_root_object.next; obj != &g_root_object; obj = obj->next) {
+ n++;
+ }
+ return n;
+}
+
+static void dump_objects(const char *kind) {
+ grpc_iomgr_object *obj;
+ for (obj = g_root_object.next; obj != &g_root_object; obj = obj->next) {
+ gpr_log(GPR_DEBUG, "%s OBJECT: %s %p", kind, obj->name, obj);
+ }
+}
+
+void grpc_iomgr_shutdown(void) {
+ gpr_timespec shutdown_deadline = gpr_time_add(
+ gpr_now(GPR_CLOCK_REALTIME), gpr_time_from_seconds(10, GPR_TIMESPAN));
+ gpr_timespec last_warning_time = gpr_now(GPR_CLOCK_REALTIME);
+ grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+
+ grpc_iomgr_platform_flush();
+
+ gpr_mu_lock(&g_mu);
+ g_shutdown = 1;
+ while (g_root_object.next != &g_root_object) {
+ if (gpr_time_cmp(
+ gpr_time_sub(gpr_now(GPR_CLOCK_REALTIME), last_warning_time),
+ gpr_time_from_seconds(1, GPR_TIMESPAN)) >= 0) {
+ if (g_root_object.next != &g_root_object) {
+ gpr_log(GPR_DEBUG, "Waiting for %d iomgr objects to be destroyed",
+ count_objects());
+ }
+ last_warning_time = gpr_now(GPR_CLOCK_REALTIME);
+ }
+ if (grpc_timer_check(&exec_ctx, gpr_inf_future(GPR_CLOCK_MONOTONIC),
+ NULL)) {
+ gpr_mu_unlock(&g_mu);
+ grpc_exec_ctx_flush(&exec_ctx);
+ gpr_mu_lock(&g_mu);
+ continue;
+ }
+ if (g_root_object.next != &g_root_object) {
+ gpr_timespec short_deadline = gpr_time_add(
+ gpr_now(GPR_CLOCK_REALTIME), gpr_time_from_millis(100, GPR_TIMESPAN));
+ if (gpr_cv_wait(&g_rcv, &g_mu, short_deadline)) {
+ if (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), shutdown_deadline) > 0) {
+ if (g_root_object.next != &g_root_object) {
+ gpr_log(GPR_DEBUG,
+ "Failed to free %d iomgr objects before shutdown deadline: "
+ "memory leaks are likely",
+ count_objects());
+ dump_objects("LEAKED");
+ if (grpc_iomgr_abort_on_leaks()) {
+ abort();
+ }
+ }
+ break;
+ }
+ }
+ }
+ }
+ gpr_mu_unlock(&g_mu);
+
+ grpc_timer_list_shutdown(&exec_ctx);
+ grpc_exec_ctx_finish(&exec_ctx);
+
+ /* ensure all threads have left g_mu */
+ gpr_mu_lock(&g_mu);
+ gpr_mu_unlock(&g_mu);
+
+ grpc_pollset_global_shutdown();
+ grpc_iomgr_platform_shutdown();
+ grpc_exec_ctx_global_shutdown();
+ gpr_mu_destroy(&g_mu);
+ gpr_cv_destroy(&g_rcv);
+}
+
+void grpc_iomgr_register_object(grpc_iomgr_object *obj, const char *name) {
+ obj->name = gpr_strdup(name);
+ gpr_mu_lock(&g_mu);
+ obj->next = &g_root_object;
+ obj->prev = g_root_object.prev;
+ obj->next->prev = obj->prev->next = obj;
+ gpr_mu_unlock(&g_mu);
+}
+
+void grpc_iomgr_unregister_object(grpc_iomgr_object *obj) {
+ gpr_mu_lock(&g_mu);
+ obj->next->prev = obj->prev;
+ obj->prev->next = obj->next;
+ gpr_cv_signal(&g_rcv);
+ gpr_mu_unlock(&g_mu);
+ gpr_free(obj->name);
+}
+
+bool grpc_iomgr_abort_on_leaks(void) {
+ char *env = gpr_getenv("GRPC_ABORT_ON_LEAKS");
+ if (env == NULL) return false;
+ static const char *truthy[] = {"yes", "Yes", "YES", "true",
+ "True", "TRUE", "1"};
+ for (size_t i = 0; i < GPR_ARRAY_SIZE(truthy); i++) {
+ if (0 == strcmp(env, truthy[i])) return true;
+ }
+ return false;
+}
diff --git a/src/core/lib/iomgr/iomgr.h b/src/core/lib/iomgr/iomgr.h
new file mode 100644
index 0000000000..babf0a85b7
--- /dev/null
+++ b/src/core/lib/iomgr/iomgr.h
@@ -0,0 +1,43 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_IOMGR_H
+#define GRPC_CORE_LIB_IOMGR_IOMGR_H
+
+/** Initializes the iomgr. */
+void grpc_iomgr_init(void);
+
+/** Signals the intention to shutdown the iomgr. */
+void grpc_iomgr_shutdown(void);
+
+#endif /* GRPC_CORE_LIB_IOMGR_IOMGR_H */
diff --git a/src/core/lib/iomgr/iomgr_internal.h b/src/core/lib/iomgr/iomgr_internal.h
new file mode 100644
index 0000000000..0963630c61
--- /dev/null
+++ b/src/core/lib/iomgr/iomgr_internal.h
@@ -0,0 +1,62 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_IOMGR_INTERNAL_H
+#define GRPC_CORE_LIB_IOMGR_IOMGR_INTERNAL_H
+
+#include <stdbool.h>
+
+#include <grpc/support/sync.h>
+#include "src/core/lib/iomgr/iomgr.h"
+
+typedef struct grpc_iomgr_object {
+ char *name;
+ struct grpc_iomgr_object *next;
+ struct grpc_iomgr_object *prev;
+} grpc_iomgr_object;
+
+void grpc_pollset_global_init(void);
+void grpc_pollset_global_shutdown(void);
+
+void grpc_iomgr_register_object(grpc_iomgr_object *obj, const char *name);
+void grpc_iomgr_unregister_object(grpc_iomgr_object *obj);
+
+void grpc_iomgr_platform_init(void);
+/** flush any globally queued work from iomgr */
+void grpc_iomgr_platform_flush(void);
+/** tear down all platform specific global iomgr structures */
+void grpc_iomgr_platform_shutdown(void);
+
+bool grpc_iomgr_abort_on_leaks(void);
+
+#endif /* GRPC_CORE_LIB_IOMGR_IOMGR_INTERNAL_H */
diff --git a/src/core/lib/iomgr/iomgr_posix.c b/src/core/lib/iomgr/iomgr_posix.c
new file mode 100644
index 0000000000..e4990f7bce
--- /dev/null
+++ b/src/core/lib/iomgr/iomgr_posix.c
@@ -0,0 +1,52 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_POSIX_SOCKET
+
+#include "src/core/lib/debug/trace.h"
+#include "src/core/lib/iomgr/fd_posix.h"
+#include "src/core/lib/iomgr/iomgr_posix.h"
+#include "src/core/lib/iomgr/tcp_posix.h"
+
+void grpc_iomgr_platform_init(void) {
+ grpc_fd_global_init();
+ grpc_register_tracer("tcp", &grpc_tcp_trace);
+}
+
+void grpc_iomgr_platform_flush(void) {}
+
+void grpc_iomgr_platform_shutdown(void) { grpc_fd_global_shutdown(); }
+
+#endif /* GRPC_POSIX_SOCKET */
diff --git a/src/core/lib/iomgr/iomgr_posix.h b/src/core/lib/iomgr/iomgr_posix.h
new file mode 100644
index 0000000000..6a8996e403
--- /dev/null
+++ b/src/core/lib/iomgr/iomgr_posix.h
@@ -0,0 +1,39 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_IOMGR_POSIX_H
+#define GRPC_CORE_LIB_IOMGR_IOMGR_POSIX_H
+
+#include "src/core/lib/iomgr/iomgr_internal.h"
+
+#endif /* GRPC_CORE_LIB_IOMGR_IOMGR_POSIX_H */
diff --git a/src/core/lib/iomgr/iomgr_windows.c b/src/core/lib/iomgr/iomgr_windows.c
new file mode 100644
index 0000000000..af7e616394
--- /dev/null
+++ b/src/core/lib/iomgr/iomgr_windows.c
@@ -0,0 +1,73 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_WINSOCK_SOCKET
+
+#include "src/core/lib/iomgr/sockaddr_win32.h"
+
+#include <grpc/support/log.h>
+
+#include "src/core/lib/iomgr/iocp_windows.h"
+#include "src/core/lib/iomgr/iomgr.h"
+#include "src/core/lib/iomgr/socket_windows.h"
+
+/* Windows' io manager is going to be fully designed using IO completion
+ ports. All of what we're doing here is basically make sure that
+ Windows sockets are initialized in and out. */
+
+static void winsock_init(void) {
+ WSADATA wsaData;
+ int status = WSAStartup(MAKEWORD(2, 0), &wsaData);
+ GPR_ASSERT(status == 0);
+}
+
+static void winsock_shutdown(void) {
+ int status = WSACleanup();
+ GPR_ASSERT(status == 0);
+}
+
+void grpc_iomgr_platform_init(void) {
+ winsock_init();
+ grpc_iocp_init();
+}
+
+void grpc_iomgr_platform_flush(void) { grpc_iocp_flush(); }
+
+void grpc_iomgr_platform_shutdown(void) {
+ grpc_iocp_shutdown();
+ winsock_shutdown();
+}
+
+#endif /* GRPC_WINSOCK_SOCKET */
diff --git a/src/core/lib/iomgr/pollset.h b/src/core/lib/iomgr/pollset.h
new file mode 100644
index 0000000000..6156124862
--- /dev/null
+++ b/src/core/lib/iomgr/pollset.h
@@ -0,0 +1,94 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_POLLSET_H
+#define GRPC_CORE_LIB_IOMGR_POLLSET_H
+
+#include <grpc/support/port_platform.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/time.h>
+
+#include "src/core/lib/iomgr/exec_ctx.h"
+
+#define GRPC_POLLSET_KICK_BROADCAST ((grpc_pollset_worker *)1)
+
+/* A grpc_pollset is a set of file descriptors that a higher level item is
+ interested in. For example:
+ - a server will typically keep a pollset containing all connected channels,
+ so that it can find new calls to service
+ - a completion queue might keep a pollset with an entry for each transport
+ that is servicing a call that it's tracking */
+
+typedef struct grpc_pollset grpc_pollset;
+typedef struct grpc_pollset_worker grpc_pollset_worker;
+
+size_t grpc_pollset_size(void);
+void grpc_pollset_init(grpc_pollset *pollset, gpr_mu **mu);
+/* Begin shutting down the pollset, and call closure when done.
+ * pollset's mutex must be held */
+void grpc_pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+ grpc_closure *closure);
+/** Reset the pollset to its initial state (perhaps with some cached objects);
+ * must have been previously shutdown */
+void grpc_pollset_reset(grpc_pollset *pollset);
+void grpc_pollset_destroy(grpc_pollset *pollset);
+
+/* Do some work on a pollset.
+ May involve invoking asynchronous callbacks, or actually polling file
+ descriptors.
+ Requires pollset's mutex locked.
+ May unlock its mutex during its execution.
+
+ worker is a (platform-specific) handle that can be used to wake up
+ from grpc_pollset_work before any events are received and before the timeout
+ has expired. It is both initialized and destroyed by grpc_pollset_work.
+ Initialization of worker is guaranteed to occur BEFORE the
+ pollset's mutex is released for the first time by grpc_pollset_work
+ and it is guaranteed that it will not be released by grpc_pollset_work
+ AFTER worker has been destroyed.
+
+ Tries not to block past deadline.
+ May call grpc_closure_list_run on grpc_closure_list, without holding the
+ pollset
+ lock */
+void grpc_pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+ grpc_pollset_worker **worker, gpr_timespec now,
+ gpr_timespec deadline);
+
+/* Break one polling thread out of polling work for this pollset.
+ If specific_worker is GRPC_POLLSET_KICK_BROADCAST, kick ALL the workers.
+ Otherwise, if specific_worker is non-NULL, then kick that worker. */
+void grpc_pollset_kick(grpc_pollset *pollset,
+ grpc_pollset_worker *specific_worker);
+
+#endif /* GRPC_CORE_LIB_IOMGR_POLLSET_H */
diff --git a/src/core/lib/iomgr/pollset_multipoller_with_epoll.c b/src/core/lib/iomgr/pollset_multipoller_with_epoll.c
new file mode 100644
index 0000000000..fa1b0d2d84
--- /dev/null
+++ b/src/core/lib/iomgr/pollset_multipoller_with_epoll.c
@@ -0,0 +1,324 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_LINUX_MULTIPOLL_WITH_EPOLL
+
+#include <errno.h>
+#include <poll.h>
+#include <string.h>
+#include <sys/epoll.h>
+#include <unistd.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/useful.h>
+#include "src/core/lib/iomgr/fd_posix.h"
+#include "src/core/lib/iomgr/pollset_posix.h"
+#include "src/core/lib/profiling/timers.h"
+#include "src/core/lib/support/block_annotate.h"
+
+struct epoll_fd_list {
+ int *epoll_fds;
+ size_t count;
+ size_t capacity;
+};
+
+static struct epoll_fd_list epoll_fd_global_list;
+static gpr_once init_epoll_fd_list_mu = GPR_ONCE_INIT;
+static gpr_mu epoll_fd_list_mu;
+
+static void init_mu(void) { gpr_mu_init(&epoll_fd_list_mu); }
+
+static void add_epoll_fd_to_global_list(int epoll_fd) {
+ gpr_once_init(&init_epoll_fd_list_mu, init_mu);
+
+ gpr_mu_lock(&epoll_fd_list_mu);
+ if (epoll_fd_global_list.count == epoll_fd_global_list.capacity) {
+ epoll_fd_global_list.capacity =
+ GPR_MAX((size_t)8, epoll_fd_global_list.capacity * 2);
+ epoll_fd_global_list.epoll_fds =
+ gpr_realloc(epoll_fd_global_list.epoll_fds,
+ epoll_fd_global_list.capacity * sizeof(int));
+ }
+ epoll_fd_global_list.epoll_fds[epoll_fd_global_list.count++] = epoll_fd;
+ gpr_mu_unlock(&epoll_fd_list_mu);
+}
+
+static void remove_epoll_fd_from_global_list(int epoll_fd) {
+ gpr_mu_lock(&epoll_fd_list_mu);
+ GPR_ASSERT(epoll_fd_global_list.count > 0);
+ for (size_t i = 0; i < epoll_fd_global_list.count; i++) {
+ if (epoll_fd == epoll_fd_global_list.epoll_fds[i]) {
+ epoll_fd_global_list.epoll_fds[i] =
+ epoll_fd_global_list.epoll_fds[--(epoll_fd_global_list.count)];
+ break;
+ }
+ }
+ gpr_mu_unlock(&epoll_fd_list_mu);
+}
+
+void grpc_remove_fd_from_all_epoll_sets(int fd) {
+ int err;
+ gpr_once_init(&init_epoll_fd_list_mu, init_mu);
+ gpr_mu_lock(&epoll_fd_list_mu);
+ if (epoll_fd_global_list.count == 0) {
+ gpr_mu_unlock(&epoll_fd_list_mu);
+ return;
+ }
+ for (size_t i = 0; i < epoll_fd_global_list.count; i++) {
+ err = epoll_ctl(epoll_fd_global_list.epoll_fds[i], EPOLL_CTL_DEL, fd, NULL);
+ if (err < 0 && errno != ENOENT) {
+ gpr_log(GPR_ERROR, "epoll_ctl del for %d failed: %s", fd,
+ strerror(errno));
+ }
+ }
+ gpr_mu_unlock(&epoll_fd_list_mu);
+}
+
+typedef struct {
+ grpc_pollset *pollset;
+ grpc_fd *fd;
+ grpc_closure closure;
+} delayed_add;
+
+typedef struct { int epoll_fd; } pollset_hdr;
+
+static void finally_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+ grpc_fd *fd) {
+ pollset_hdr *h = pollset->data.ptr;
+ struct epoll_event ev;
+ int err;
+ grpc_fd_watcher watcher;
+
+ /* We pretend to be polling whilst adding an fd to keep the fd from being
+ closed during the add. This may result in a spurious wakeup being assigned
+ to this pollset whilst adding, but that should be benign. */
+ GPR_ASSERT(grpc_fd_begin_poll(fd, pollset, NULL, 0, 0, &watcher) == 0);
+ if (watcher.fd != NULL) {
+ ev.events = (uint32_t)(EPOLLIN | EPOLLOUT | EPOLLET);
+ ev.data.ptr = fd;
+ err = epoll_ctl(h->epoll_fd, EPOLL_CTL_ADD, fd->fd, &ev);
+ if (err < 0) {
+ /* FDs may be added to a pollset multiple times, so EEXIST is normal. */
+ if (errno != EEXIST) {
+ gpr_log(GPR_ERROR, "epoll_ctl add for %d failed: %s", fd->fd,
+ strerror(errno));
+ }
+ }
+ }
+ grpc_fd_end_poll(exec_ctx, &watcher, 0, 0);
+}
+
+static void perform_delayed_add(grpc_exec_ctx *exec_ctx, void *arg,
+ bool iomgr_status) {
+ delayed_add *da = arg;
+
+ if (!grpc_fd_is_orphaned(da->fd)) {
+ finally_add_fd(exec_ctx, da->pollset, da->fd);
+ }
+
+ gpr_mu_lock(&da->pollset->mu);
+ da->pollset->in_flight_cbs--;
+ if (da->pollset->shutting_down) {
+ /* We don't care about this pollset anymore. */
+ if (da->pollset->in_flight_cbs == 0 && !da->pollset->called_shutdown) {
+ da->pollset->called_shutdown = 1;
+ grpc_exec_ctx_enqueue(exec_ctx, da->pollset->shutdown_done, true, NULL);
+ }
+ }
+ gpr_mu_unlock(&da->pollset->mu);
+
+ GRPC_FD_UNREF(da->fd, "delayed_add");
+
+ gpr_free(da);
+}
+
+static void multipoll_with_epoll_pollset_add_fd(grpc_exec_ctx *exec_ctx,
+ grpc_pollset *pollset,
+ grpc_fd *fd,
+ int and_unlock_pollset) {
+ if (and_unlock_pollset) {
+ gpr_mu_unlock(&pollset->mu);
+ finally_add_fd(exec_ctx, pollset, fd);
+ } else {
+ delayed_add *da = gpr_malloc(sizeof(*da));
+ da->pollset = pollset;
+ da->fd = fd;
+ GRPC_FD_REF(fd, "delayed_add");
+ grpc_closure_init(&da->closure, perform_delayed_add, da);
+ pollset->in_flight_cbs++;
+ grpc_exec_ctx_enqueue(exec_ctx, &da->closure, true, NULL);
+ }
+}
+
+/* TODO(klempner): We probably want to turn this down a bit */
+#define GRPC_EPOLL_MAX_EVENTS 1000
+
+static void multipoll_with_epoll_pollset_maybe_work_and_unlock(
+ grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, grpc_pollset_worker *worker,
+ gpr_timespec deadline, gpr_timespec now) {
+ struct epoll_event ep_ev[GRPC_EPOLL_MAX_EVENTS];
+ int ep_rv;
+ int poll_rv;
+ pollset_hdr *h = pollset->data.ptr;
+ int timeout_ms;
+ struct pollfd pfds[2];
+
+ /* If you want to ignore epoll's ability to sanely handle parallel pollers,
+ * for a more apples-to-apples performance comparison with poll, add a
+ * if (pollset->counter != 0) { return 0; }
+ * here.
+ */
+
+ gpr_mu_unlock(&pollset->mu);
+
+ timeout_ms = grpc_poll_deadline_to_millis_timeout(deadline, now);
+
+ pfds[0].fd = GRPC_WAKEUP_FD_GET_READ_FD(&worker->wakeup_fd->fd);
+ pfds[0].events = POLLIN;
+ pfds[0].revents = 0;
+ pfds[1].fd = h->epoll_fd;
+ pfds[1].events = POLLIN;
+ pfds[1].revents = 0;
+
+ /* TODO(vpai): Consider first doing a 0 timeout poll here to avoid
+ even going into the blocking annotation if possible */
+ GPR_TIMER_BEGIN("poll", 0);
+ GRPC_SCHEDULING_START_BLOCKING_REGION;
+ poll_rv = grpc_poll_function(pfds, 2, timeout_ms);
+ GRPC_SCHEDULING_END_BLOCKING_REGION;
+ GPR_TIMER_END("poll", 0);
+
+ if (poll_rv < 0) {
+ if (errno != EINTR) {
+ gpr_log(GPR_ERROR, "poll() failed: %s", strerror(errno));
+ }
+ } else if (poll_rv == 0) {
+ /* do nothing */
+ } else {
+ if (pfds[0].revents) {
+ grpc_wakeup_fd_consume_wakeup(&worker->wakeup_fd->fd);
+ }
+ if (pfds[1].revents) {
+ do {
+ /* The following epoll_wait never blocks; it has a timeout of 0 */
+ ep_rv = epoll_wait(h->epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, 0);
+ if (ep_rv < 0) {
+ if (errno != EINTR) {
+ gpr_log(GPR_ERROR, "epoll_wait() failed: %s", strerror(errno));
+ }
+ } else {
+ int i;
+ for (i = 0; i < ep_rv; ++i) {
+ grpc_fd *fd = ep_ev[i].data.ptr;
+ /* TODO(klempner): We might want to consider making err and pri
+ * separate events */
+ int cancel = ep_ev[i].events & (EPOLLERR | EPOLLHUP);
+ int read_ev = ep_ev[i].events & (EPOLLIN | EPOLLPRI);
+ int write_ev = ep_ev[i].events & EPOLLOUT;
+ if (fd == NULL) {
+ grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
+ } else {
+ if (read_ev || cancel) {
+ grpc_fd_become_readable(exec_ctx, fd);
+ }
+ if (write_ev || cancel) {
+ grpc_fd_become_writable(exec_ctx, fd);
+ }
+ }
+ }
+ }
+ } while (ep_rv == GRPC_EPOLL_MAX_EVENTS);
+ }
+ }
+}
+
+static void multipoll_with_epoll_pollset_finish_shutdown(
+ grpc_pollset *pollset) {}
+
+static void multipoll_with_epoll_pollset_destroy(grpc_pollset *pollset) {
+ pollset_hdr *h = pollset->data.ptr;
+ close(h->epoll_fd);
+ remove_epoll_fd_from_global_list(h->epoll_fd);
+ gpr_free(h);
+}
+
+static const grpc_pollset_vtable multipoll_with_epoll_pollset = {
+ multipoll_with_epoll_pollset_add_fd,
+ multipoll_with_epoll_pollset_maybe_work_and_unlock,
+ multipoll_with_epoll_pollset_finish_shutdown,
+ multipoll_with_epoll_pollset_destroy};
+
+static void epoll_become_multipoller(grpc_exec_ctx *exec_ctx,
+ grpc_pollset *pollset, grpc_fd **fds,
+ size_t nfds) {
+ size_t i;
+ pollset_hdr *h = gpr_malloc(sizeof(pollset_hdr));
+ struct epoll_event ev;
+ int err;
+
+ pollset->vtable = &multipoll_with_epoll_pollset;
+ pollset->data.ptr = h;
+ h->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
+ if (h->epoll_fd < 0) {
+ /* TODO(klempner): Fall back to poll here, especially on ENOSYS */
+ gpr_log(GPR_ERROR, "epoll_create1 failed: %s", strerror(errno));
+ abort();
+ }
+ add_epoll_fd_to_global_list(h->epoll_fd);
+
+ ev.events = (uint32_t)(EPOLLIN | EPOLLET);
+ ev.data.ptr = NULL;
+ err = epoll_ctl(h->epoll_fd, EPOLL_CTL_ADD,
+ GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd), &ev);
+ if (err < 0) {
+ gpr_log(GPR_ERROR, "epoll_ctl add for %d failed: %s",
+ GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd),
+ strerror(errno));
+ }
+
+ for (i = 0; i < nfds; i++) {
+ multipoll_with_epoll_pollset_add_fd(exec_ctx, pollset, fds[i], 0);
+ }
+}
+
+grpc_platform_become_multipoller_type grpc_platform_become_multipoller =
+ epoll_become_multipoller;
+
+#else /* GPR_LINUX_MULTIPOLL_WITH_EPOLL */
+
+void grpc_remove_fd_from_all_epoll_sets(int fd) {}
+
+#endif /* GPR_LINUX_MULTIPOLL_WITH_EPOLL */
diff --git a/src/core/lib/iomgr/pollset_multipoller_with_poll_posix.c b/src/core/lib/iomgr/pollset_multipoller_with_poll_posix.c
new file mode 100644
index 0000000000..9b33f6dbb2
--- /dev/null
+++ b/src/core/lib/iomgr/pollset_multipoller_with_poll_posix.c
@@ -0,0 +1,234 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_POSIX_SOCKET
+
+#include "src/core/lib/iomgr/pollset_posix.h"
+
+#include <errno.h>
+#include <poll.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/useful.h>
+
+#include "src/core/lib/iomgr/fd_posix.h"
+#include "src/core/lib/iomgr/iomgr_internal.h"
+#include "src/core/lib/iomgr/pollset_posix.h"
+#include "src/core/lib/support/block_annotate.h"
+
+typedef struct {
+ /* all polled fds */
+ size_t fd_count;
+ size_t fd_capacity;
+ grpc_fd **fds;
+ /* fds that have been removed from the pollset explicitly */
+ size_t del_count;
+ size_t del_capacity;
+ grpc_fd **dels;
+} pollset_hdr;
+
+static void multipoll_with_poll_pollset_add_fd(grpc_exec_ctx *exec_ctx,
+ grpc_pollset *pollset,
+ grpc_fd *fd,
+ int and_unlock_pollset) {
+ size_t i;
+ pollset_hdr *h = pollset->data.ptr;
+ /* TODO(ctiller): this is O(num_fds^2); maybe switch to a hash set here */
+ for (i = 0; i < h->fd_count; i++) {
+ if (h->fds[i] == fd) goto exit;
+ }
+ if (h->fd_count == h->fd_capacity) {
+ h->fd_capacity = GPR_MAX(h->fd_capacity + 8, h->fd_count * 3 / 2);
+ h->fds = gpr_realloc(h->fds, sizeof(grpc_fd *) * h->fd_capacity);
+ }
+ h->fds[h->fd_count++] = fd;
+ GRPC_FD_REF(fd, "multipoller");
+exit:
+ if (and_unlock_pollset) {
+ gpr_mu_unlock(&pollset->mu);
+ }
+}
+
+static void multipoll_with_poll_pollset_maybe_work_and_unlock(
+ grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, grpc_pollset_worker *worker,
+ gpr_timespec deadline, gpr_timespec now) {
+#define POLLOUT_CHECK (POLLOUT | POLLHUP | POLLERR)
+#define POLLIN_CHECK (POLLIN | POLLHUP | POLLERR)
+
+ int timeout;
+ int r;
+ size_t i, j, fd_count;
+ nfds_t pfd_count;
+ pollset_hdr *h;
+ /* TODO(ctiller): inline some elements to avoid an allocation */
+ grpc_fd_watcher *watchers;
+ struct pollfd *pfds;
+
+ h = pollset->data.ptr;
+ timeout = grpc_poll_deadline_to_millis_timeout(deadline, now);
+ /* TODO(ctiller): perform just one malloc here if we exceed the inline case */
+ pfds = gpr_malloc(sizeof(*pfds) * (h->fd_count + 2));
+ watchers = gpr_malloc(sizeof(*watchers) * (h->fd_count + 2));
+ fd_count = 0;
+ pfd_count = 2;
+ pfds[0].fd = GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd);
+ pfds[0].events = POLLIN;
+ pfds[0].revents = 0;
+ pfds[1].fd = GRPC_WAKEUP_FD_GET_READ_FD(&worker->wakeup_fd->fd);
+ pfds[1].events = POLLIN;
+ pfds[1].revents = 0;
+ for (i = 0; i < h->fd_count; i++) {
+ int remove = grpc_fd_is_orphaned(h->fds[i]);
+ for (j = 0; !remove && j < h->del_count; j++) {
+ if (h->fds[i] == h->dels[j]) remove = 1;
+ }
+ if (remove) {
+ GRPC_FD_UNREF(h->fds[i], "multipoller");
+ } else {
+ h->fds[fd_count++] = h->fds[i];
+ watchers[pfd_count].fd = h->fds[i];
+ GRPC_FD_REF(watchers[pfd_count].fd, "multipoller_start");
+ pfds[pfd_count].fd = h->fds[i]->fd;
+ pfds[pfd_count].revents = 0;
+ pfd_count++;
+ }
+ }
+ for (j = 0; j < h->del_count; j++) {
+ GRPC_FD_UNREF(h->dels[j], "multipoller_del");
+ }
+ h->del_count = 0;
+ h->fd_count = fd_count;
+ gpr_mu_unlock(&pollset->mu);
+
+ for (i = 2; i < pfd_count; i++) {
+ grpc_fd *fd = watchers[i].fd;
+ pfds[i].events = (short)grpc_fd_begin_poll(fd, pollset, worker, POLLIN,
+ POLLOUT, &watchers[i]);
+ GRPC_FD_UNREF(fd, "multipoller_start");
+ }
+
+ /* TODO(vpai): Consider first doing a 0 timeout poll here to avoid
+ even going into the blocking annotation if possible */
+ GRPC_SCHEDULING_START_BLOCKING_REGION;
+ r = grpc_poll_function(pfds, pfd_count, timeout);
+ GRPC_SCHEDULING_END_BLOCKING_REGION;
+
+ if (r < 0) {
+ if (errno != EINTR) {
+ gpr_log(GPR_ERROR, "poll() failed: %s", strerror(errno));
+ }
+ for (i = 2; i < pfd_count; i++) {
+ grpc_fd_end_poll(exec_ctx, &watchers[i], 0, 0);
+ }
+ } else if (r == 0) {
+ for (i = 2; i < pfd_count; i++) {
+ grpc_fd_end_poll(exec_ctx, &watchers[i], 0, 0);
+ }
+ } else {
+ if (pfds[0].revents & POLLIN_CHECK) {
+ grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
+ }
+ if (pfds[1].revents & POLLIN_CHECK) {
+ grpc_wakeup_fd_consume_wakeup(&worker->wakeup_fd->fd);
+ }
+ for (i = 2; i < pfd_count; i++) {
+ if (watchers[i].fd == NULL) {
+ grpc_fd_end_poll(exec_ctx, &watchers[i], 0, 0);
+ continue;
+ }
+ grpc_fd_end_poll(exec_ctx, &watchers[i], pfds[i].revents & POLLIN_CHECK,
+ pfds[i].revents & POLLOUT_CHECK);
+ }
+ }
+
+ gpr_free(pfds);
+ gpr_free(watchers);
+}
+
+static void multipoll_with_poll_pollset_finish_shutdown(grpc_pollset *pollset) {
+ size_t i;
+ pollset_hdr *h = pollset->data.ptr;
+ for (i = 0; i < h->fd_count; i++) {
+ GRPC_FD_UNREF(h->fds[i], "multipoller");
+ }
+ for (i = 0; i < h->del_count; i++) {
+ GRPC_FD_UNREF(h->dels[i], "multipoller_del");
+ }
+ h->fd_count = 0;
+ h->del_count = 0;
+}
+
+static void multipoll_with_poll_pollset_destroy(grpc_pollset *pollset) {
+ pollset_hdr *h = pollset->data.ptr;
+ multipoll_with_poll_pollset_finish_shutdown(pollset);
+ gpr_free(h->fds);
+ gpr_free(h->dels);
+ gpr_free(h);
+}
+
+static const grpc_pollset_vtable multipoll_with_poll_pollset = {
+ multipoll_with_poll_pollset_add_fd,
+ multipoll_with_poll_pollset_maybe_work_and_unlock,
+ multipoll_with_poll_pollset_finish_shutdown,
+ multipoll_with_poll_pollset_destroy};
+
+void grpc_poll_become_multipoller(grpc_exec_ctx *exec_ctx,
+ grpc_pollset *pollset, grpc_fd **fds,
+ size_t nfds) {
+ size_t i;
+ pollset_hdr *h = gpr_malloc(sizeof(pollset_hdr));
+ pollset->vtable = &multipoll_with_poll_pollset;
+ pollset->data.ptr = h;
+ h->fd_count = nfds;
+ h->fd_capacity = nfds;
+ h->fds = gpr_malloc(nfds * sizeof(grpc_fd *));
+ h->del_count = 0;
+ h->del_capacity = 0;
+ h->dels = NULL;
+ for (i = 0; i < nfds; i++) {
+ h->fds[i] = fds[i];
+ GRPC_FD_REF(fds[i], "multipoller");
+ }
+}
+
+#endif /* GPR_POSIX_SOCKET */
+
+#ifdef GPR_POSIX_MULTIPOLL_WITH_POLL
+grpc_platform_become_multipoller_type grpc_platform_become_multipoller =
+ grpc_poll_become_multipoller;
+#endif
diff --git a/src/core/lib/iomgr/pollset_posix.c b/src/core/lib/iomgr/pollset_posix.c
new file mode 100644
index 0000000000..259c7bc194
--- /dev/null
+++ b/src/core/lib/iomgr/pollset_posix.c
@@ -0,0 +1,633 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_POSIX_SOCKET
+
+#include "src/core/lib/iomgr/pollset_posix.h"
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/thd.h>
+#include <grpc/support/tls.h>
+#include <grpc/support/useful.h>
+#include "src/core/lib/iomgr/fd_posix.h"
+#include "src/core/lib/iomgr/iomgr_internal.h"
+#include "src/core/lib/iomgr/socket_utils_posix.h"
+#include "src/core/lib/profiling/timers.h"
+#include "src/core/lib/support/block_annotate.h"
+
+GPR_TLS_DECL(g_current_thread_poller);
+GPR_TLS_DECL(g_current_thread_worker);
+
+/** Default poll() function - a pointer so that it can be overridden by some
+ * tests */
+grpc_poll_function_type grpc_poll_function = poll;
+
+/** The alarm system needs to be able to wakeup 'some poller' sometimes
+ * (specifically when a new alarm needs to be triggered earlier than the next
+ * alarm 'epoch').
+ * This wakeup_fd gives us something to alert on when such a case occurs. */
+grpc_wakeup_fd grpc_global_wakeup_fd;
+
+static void remove_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
+ worker->prev->next = worker->next;
+ worker->next->prev = worker->prev;
+}
+
+int grpc_pollset_has_workers(grpc_pollset *p) {
+ return p->root_worker.next != &p->root_worker;
+}
+
+static grpc_pollset_worker *pop_front_worker(grpc_pollset *p) {
+ if (grpc_pollset_has_workers(p)) {
+ grpc_pollset_worker *w = p->root_worker.next;
+ remove_worker(p, w);
+ return w;
+ } else {
+ return NULL;
+ }
+}
+
+static void push_back_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
+ worker->next = &p->root_worker;
+ worker->prev = worker->next->prev;
+ worker->prev->next = worker->next->prev = worker;
+}
+
+static void push_front_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
+ worker->prev = &p->root_worker;
+ worker->next = worker->prev->next;
+ worker->prev->next = worker->next->prev = worker;
+}
+
+size_t grpc_pollset_size(void) { return sizeof(grpc_pollset); }
+
+void grpc_pollset_kick_ext(grpc_pollset *p,
+ grpc_pollset_worker *specific_worker,
+ uint32_t flags) {
+ GPR_TIMER_BEGIN("grpc_pollset_kick_ext", 0);
+
+ /* pollset->mu already held */
+ if (specific_worker != NULL) {
+ if (specific_worker == GRPC_POLLSET_KICK_BROADCAST) {
+ GPR_TIMER_BEGIN("grpc_pollset_kick_ext.broadcast", 0);
+ GPR_ASSERT((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) == 0);
+ for (specific_worker = p->root_worker.next;
+ specific_worker != &p->root_worker;
+ specific_worker = specific_worker->next) {
+ grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
+ }
+ p->kicked_without_pollers = 1;
+ GPR_TIMER_END("grpc_pollset_kick_ext.broadcast", 0);
+ } else if (gpr_tls_get(&g_current_thread_worker) !=
+ (intptr_t)specific_worker) {
+ GPR_TIMER_MARK("different_thread_worker", 0);
+ if ((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) != 0) {
+ specific_worker->reevaluate_polling_on_wakeup = 1;
+ }
+ specific_worker->kicked_specifically = 1;
+ grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
+ } else if ((flags & GRPC_POLLSET_CAN_KICK_SELF) != 0) {
+ GPR_TIMER_MARK("kick_yoself", 0);
+ if ((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) != 0) {
+ specific_worker->reevaluate_polling_on_wakeup = 1;
+ }
+ specific_worker->kicked_specifically = 1;
+ grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
+ }
+ } else if (gpr_tls_get(&g_current_thread_poller) != (intptr_t)p) {
+ GPR_ASSERT((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) == 0);
+ GPR_TIMER_MARK("kick_anonymous", 0);
+ specific_worker = pop_front_worker(p);
+ if (specific_worker != NULL) {
+ if (gpr_tls_get(&g_current_thread_worker) == (intptr_t)specific_worker) {
+ GPR_TIMER_MARK("kick_anonymous_not_self", 0);
+ push_back_worker(p, specific_worker);
+ specific_worker = pop_front_worker(p);
+ if ((flags & GRPC_POLLSET_CAN_KICK_SELF) == 0 &&
+ gpr_tls_get(&g_current_thread_worker) ==
+ (intptr_t)specific_worker) {
+ push_back_worker(p, specific_worker);
+ specific_worker = NULL;
+ }
+ }
+ if (specific_worker != NULL) {
+ GPR_TIMER_MARK("finally_kick", 0);
+ push_back_worker(p, specific_worker);
+ grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
+ }
+ } else {
+ GPR_TIMER_MARK("kicked_no_pollers", 0);
+ p->kicked_without_pollers = 1;
+ }
+ }
+
+ GPR_TIMER_END("grpc_pollset_kick_ext", 0);
+}
+
+void grpc_pollset_kick(grpc_pollset *p, grpc_pollset_worker *specific_worker) {
+ grpc_pollset_kick_ext(p, specific_worker, 0);
+}
+
+/* global state management */
+
+void grpc_pollset_global_init(void) {
+ gpr_tls_init(&g_current_thread_poller);
+ gpr_tls_init(&g_current_thread_worker);
+ grpc_wakeup_fd_global_init();
+ grpc_wakeup_fd_init(&grpc_global_wakeup_fd);
+}
+
+void grpc_pollset_global_shutdown(void) {
+ grpc_wakeup_fd_destroy(&grpc_global_wakeup_fd);
+ gpr_tls_destroy(&g_current_thread_poller);
+ gpr_tls_destroy(&g_current_thread_worker);
+ grpc_wakeup_fd_global_destroy();
+}
+
+void grpc_kick_poller(void) { grpc_wakeup_fd_wakeup(&grpc_global_wakeup_fd); }
+
+/* main interface */
+
+static void become_basic_pollset(grpc_pollset *pollset, grpc_fd *fd_or_null);
+
+void grpc_pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
+ gpr_mu_init(&pollset->mu);
+ *mu = &pollset->mu;
+ pollset->root_worker.next = pollset->root_worker.prev = &pollset->root_worker;
+ pollset->in_flight_cbs = 0;
+ pollset->shutting_down = 0;
+ pollset->called_shutdown = 0;
+ pollset->kicked_without_pollers = 0;
+ pollset->idle_jobs.head = pollset->idle_jobs.tail = NULL;
+ pollset->local_wakeup_cache = NULL;
+ pollset->kicked_without_pollers = 0;
+ become_basic_pollset(pollset, NULL);
+}
+
+void grpc_pollset_destroy(grpc_pollset *pollset) {
+ GPR_ASSERT(pollset->in_flight_cbs == 0);
+ GPR_ASSERT(!grpc_pollset_has_workers(pollset));
+ GPR_ASSERT(pollset->idle_jobs.head == pollset->idle_jobs.tail);
+ pollset->vtable->destroy(pollset);
+ while (pollset->local_wakeup_cache) {
+ grpc_cached_wakeup_fd *next = pollset->local_wakeup_cache->next;
+ grpc_wakeup_fd_destroy(&pollset->local_wakeup_cache->fd);
+ gpr_free(pollset->local_wakeup_cache);
+ pollset->local_wakeup_cache = next;
+ }
+}
+
+void grpc_pollset_reset(grpc_pollset *pollset) {
+ GPR_ASSERT(pollset->shutting_down);
+ GPR_ASSERT(pollset->in_flight_cbs == 0);
+ GPR_ASSERT(!grpc_pollset_has_workers(pollset));
+ GPR_ASSERT(pollset->idle_jobs.head == pollset->idle_jobs.tail);
+ pollset->vtable->destroy(pollset);
+ pollset->shutting_down = 0;
+ pollset->called_shutdown = 0;
+ pollset->kicked_without_pollers = 0;
+ become_basic_pollset(pollset, NULL);
+}
+
+void grpc_pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+ grpc_fd *fd) {
+ gpr_mu_lock(&pollset->mu);
+ pollset->vtable->add_fd(exec_ctx, pollset, fd, 1);
+/* the following (enabled only in debug) will reacquire and then release
+ our lock - meaning that if the unlocking flag passed to add_fd above is
+ not respected, the code will deadlock (in a way that we have a chance of
+ debugging) */
+#ifndef NDEBUG
+ gpr_mu_lock(&pollset->mu);
+ gpr_mu_unlock(&pollset->mu);
+#endif
+}
+
+static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset) {
+ GPR_ASSERT(grpc_closure_list_empty(pollset->idle_jobs));
+ pollset->vtable->finish_shutdown(pollset);
+ grpc_exec_ctx_enqueue(exec_ctx, pollset->shutdown_done, true, NULL);
+}
+
+void grpc_pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+ grpc_pollset_worker **worker_hdl, gpr_timespec now,
+ gpr_timespec deadline) {
+ grpc_pollset_worker worker;
+ *worker_hdl = &worker;
+
+ /* pollset->mu already held */
+ int added_worker = 0;
+ int locked = 1;
+ int queued_work = 0;
+ int keep_polling = 0;
+ GPR_TIMER_BEGIN("grpc_pollset_work", 0);
+ /* this must happen before we (potentially) drop pollset->mu */
+ worker.next = worker.prev = NULL;
+ worker.reevaluate_polling_on_wakeup = 0;
+ if (pollset->local_wakeup_cache != NULL) {
+ worker.wakeup_fd = pollset->local_wakeup_cache;
+ pollset->local_wakeup_cache = worker.wakeup_fd->next;
+ } else {
+ worker.wakeup_fd = gpr_malloc(sizeof(*worker.wakeup_fd));
+ grpc_wakeup_fd_init(&worker.wakeup_fd->fd);
+ }
+ worker.kicked_specifically = 0;
+ /* If there's work waiting for the pollset to be idle, and the
+ pollset is idle, then do that work */
+ if (!grpc_pollset_has_workers(pollset) &&
+ !grpc_closure_list_empty(pollset->idle_jobs)) {
+ GPR_TIMER_MARK("grpc_pollset_work.idle_jobs", 0);
+ grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs, NULL);
+ goto done;
+ }
+ /* If we're shutting down then we don't execute any extended work */
+ if (pollset->shutting_down) {
+ GPR_TIMER_MARK("grpc_pollset_work.shutting_down", 0);
+ goto done;
+ }
+ /* Give do_promote priority so we don't starve it out */
+ if (pollset->in_flight_cbs) {
+ GPR_TIMER_MARK("grpc_pollset_work.in_flight_cbs", 0);
+ gpr_mu_unlock(&pollset->mu);
+ locked = 0;
+ goto done;
+ }
+ /* Start polling, and keep doing so while we're being asked to
+ re-evaluate our pollers (this allows poll() based pollers to
+ ensure they don't miss wakeups) */
+ keep_polling = 1;
+ while (keep_polling) {
+ keep_polling = 0;
+ if (!pollset->kicked_without_pollers) {
+ if (!added_worker) {
+ push_front_worker(pollset, &worker);
+ added_worker = 1;
+ gpr_tls_set(&g_current_thread_worker, (intptr_t)&worker);
+ }
+ gpr_tls_set(&g_current_thread_poller, (intptr_t)pollset);
+ GPR_TIMER_BEGIN("maybe_work_and_unlock", 0);
+ pollset->vtable->maybe_work_and_unlock(exec_ctx, pollset, &worker,
+ deadline, now);
+ GPR_TIMER_END("maybe_work_and_unlock", 0);
+ locked = 0;
+ gpr_tls_set(&g_current_thread_poller, 0);
+ } else {
+ GPR_TIMER_MARK("grpc_pollset_work.kicked_without_pollers", 0);
+ pollset->kicked_without_pollers = 0;
+ }
+ /* Finished execution - start cleaning up.
+ Note that we may arrive here from outside the enclosing while() loop.
+ In that case we won't loop though as we haven't added worker to the
+ worker list, which means nobody could ask us to re-evaluate polling). */
+ done:
+ if (!locked) {
+ queued_work |= grpc_exec_ctx_flush(exec_ctx);
+ gpr_mu_lock(&pollset->mu);
+ locked = 1;
+ }
+ /* If we're forced to re-evaluate polling (via grpc_pollset_kick with
+ GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) then we land here and force
+ a loop */
+ if (worker.reevaluate_polling_on_wakeup) {
+ worker.reevaluate_polling_on_wakeup = 0;
+ pollset->kicked_without_pollers = 0;
+ if (queued_work || worker.kicked_specifically) {
+ /* If there's queued work on the list, then set the deadline to be
+ immediate so we get back out of the polling loop quickly */
+ deadline = gpr_inf_past(GPR_CLOCK_MONOTONIC);
+ }
+ keep_polling = 1;
+ }
+ }
+ if (added_worker) {
+ remove_worker(pollset, &worker);
+ gpr_tls_set(&g_current_thread_worker, 0);
+ }
+ /* release wakeup fd to the local pool */
+ worker.wakeup_fd->next = pollset->local_wakeup_cache;
+ pollset->local_wakeup_cache = worker.wakeup_fd;
+ /* check shutdown conditions */
+ if (pollset->shutting_down) {
+ if (grpc_pollset_has_workers(pollset)) {
+ grpc_pollset_kick(pollset, NULL);
+ } else if (!pollset->called_shutdown && pollset->in_flight_cbs == 0) {
+ pollset->called_shutdown = 1;
+ gpr_mu_unlock(&pollset->mu);
+ finish_shutdown(exec_ctx, pollset);
+ grpc_exec_ctx_flush(exec_ctx);
+ /* Continuing to access pollset here is safe -- it is the caller's
+ * responsibility to not destroy when it has outstanding calls to
+ * grpc_pollset_work.
+ * TODO(dklempner): Can we refactor the shutdown logic to avoid this? */
+ gpr_mu_lock(&pollset->mu);
+ } else if (!grpc_closure_list_empty(pollset->idle_jobs)) {
+ grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs, NULL);
+ gpr_mu_unlock(&pollset->mu);
+ grpc_exec_ctx_flush(exec_ctx);
+ gpr_mu_lock(&pollset->mu);
+ }
+ }
+ *worker_hdl = NULL;
+ GPR_TIMER_END("grpc_pollset_work", 0);
+}
+
+void grpc_pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+ grpc_closure *closure) {
+ GPR_ASSERT(!pollset->shutting_down);
+ pollset->shutting_down = 1;
+ pollset->shutdown_done = closure;
+ grpc_pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
+ if (!grpc_pollset_has_workers(pollset)) {
+ grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs, NULL);
+ }
+ if (!pollset->called_shutdown && pollset->in_flight_cbs == 0 &&
+ !grpc_pollset_has_workers(pollset)) {
+ pollset->called_shutdown = 1;
+ finish_shutdown(exec_ctx, pollset);
+ }
+}
+
+int grpc_poll_deadline_to_millis_timeout(gpr_timespec deadline,
+ gpr_timespec now) {
+ gpr_timespec timeout;
+ static const int64_t max_spin_polling_us = 10;
+ if (gpr_time_cmp(deadline, gpr_inf_future(deadline.clock_type)) == 0) {
+ return -1;
+ }
+ if (gpr_time_cmp(deadline, gpr_time_add(now, gpr_time_from_micros(
+ max_spin_polling_us,
+ GPR_TIMESPAN))) <= 0) {
+ return 0;
+ }
+ timeout = gpr_time_sub(deadline, now);
+ return gpr_time_to_millis(gpr_time_add(
+ timeout, gpr_time_from_nanos(GPR_NS_PER_MS - 1, GPR_TIMESPAN)));
+}
+
+/*
+ * basic_pollset - a vtable that provides polling for zero or one file
+ * descriptor via poll()
+ */
+
+typedef struct grpc_unary_promote_args {
+ const grpc_pollset_vtable *original_vtable;
+ grpc_pollset *pollset;
+ grpc_fd *fd;
+ grpc_closure promotion_closure;
+} grpc_unary_promote_args;
+
+static void basic_do_promote(grpc_exec_ctx *exec_ctx, void *args,
+ bool success) {
+ grpc_unary_promote_args *up_args = args;
+ const grpc_pollset_vtable *original_vtable = up_args->original_vtable;
+ grpc_pollset *pollset = up_args->pollset;
+ grpc_fd *fd = up_args->fd;
+
+ /*
+ * This is quite tricky. There are a number of cases to keep in mind here:
+ * 1. fd may have been orphaned
+ * 2. The pollset may no longer be a unary poller (and we can't let case #1
+ * leak to other pollset types!)
+ * 3. pollset's fd (which may have changed) may have been orphaned
+ * 4. The pollset may be shutting down.
+ */
+
+ gpr_mu_lock(&pollset->mu);
+ /* First we need to ensure that nobody is polling concurrently */
+ GPR_ASSERT(!grpc_pollset_has_workers(pollset));
+
+ gpr_free(up_args);
+ /* At this point the pollset may no longer be a unary poller. In that case
+ * we should just call the right add function and be done. */
+ /* TODO(klempner): If we're not careful this could cause infinite recursion.
+ * That's not a problem for now because empty_pollset has a trivial poller
+ * and we don't have any mechanism to unbecome multipoller. */
+ pollset->in_flight_cbs--;
+ if (pollset->shutting_down) {
+ /* We don't care about this pollset anymore. */
+ if (pollset->in_flight_cbs == 0 && !pollset->called_shutdown) {
+ pollset->called_shutdown = 1;
+ finish_shutdown(exec_ctx, pollset);
+ }
+ } else if (grpc_fd_is_orphaned(fd)) {
+ /* Don't try to add it to anything, we'll drop our ref on it below */
+ } else if (pollset->vtable != original_vtable) {
+ pollset->vtable->add_fd(exec_ctx, pollset, fd, 0);
+ } else if (fd != pollset->data.ptr) {
+ grpc_fd *fds[2];
+ fds[0] = pollset->data.ptr;
+ fds[1] = fd;
+
+ if (fds[0] && !grpc_fd_is_orphaned(fds[0])) {
+ grpc_platform_become_multipoller(exec_ctx, pollset, fds,
+ GPR_ARRAY_SIZE(fds));
+ GRPC_FD_UNREF(fds[0], "basicpoll");
+ } else {
+ /* old fd is orphaned and we haven't cleaned it up until now, so remain a
+ * unary poller */
+ /* Note that it is possible that fds[1] is also orphaned at this point.
+ * That's okay, we'll correct it at the next add or poll. */
+ if (fds[0]) GRPC_FD_UNREF(fds[0], "basicpoll");
+ pollset->data.ptr = fd;
+ GRPC_FD_REF(fd, "basicpoll");
+ }
+ }
+
+ gpr_mu_unlock(&pollset->mu);
+
+ /* Matching ref in basic_pollset_add_fd */
+ GRPC_FD_UNREF(fd, "basicpoll_add");
+}
+
+static void basic_pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+ grpc_fd *fd, int and_unlock_pollset) {
+ grpc_unary_promote_args *up_args;
+ GPR_ASSERT(fd);
+ if (fd == pollset->data.ptr) goto exit;
+
+ if (!grpc_pollset_has_workers(pollset)) {
+ /* Fast path -- no in flight cbs */
+ /* TODO(klempner): Comment this out and fix any test failures or establish
+ * they are due to timing issues */
+ grpc_fd *fds[2];
+ fds[0] = pollset->data.ptr;
+ fds[1] = fd;
+
+ if (fds[0] == NULL) {
+ pollset->data.ptr = fd;
+ GRPC_FD_REF(fd, "basicpoll");
+ } else if (!grpc_fd_is_orphaned(fds[0])) {
+ grpc_platform_become_multipoller(exec_ctx, pollset, fds,
+ GPR_ARRAY_SIZE(fds));
+ GRPC_FD_UNREF(fds[0], "basicpoll");
+ } else {
+ /* old fd is orphaned and we haven't cleaned it up until now, so remain a
+ * unary poller */
+ GRPC_FD_UNREF(fds[0], "basicpoll");
+ pollset->data.ptr = fd;
+ GRPC_FD_REF(fd, "basicpoll");
+ }
+ goto exit;
+ }
+
+ /* Now we need to promote. This needs to happen when we're not polling. Since
+ * this may be called from poll, the wait needs to happen asynchronously. */
+ GRPC_FD_REF(fd, "basicpoll_add");
+ pollset->in_flight_cbs++;
+ up_args = gpr_malloc(sizeof(*up_args));
+ up_args->fd = fd;
+ up_args->original_vtable = pollset->vtable;
+ up_args->pollset = pollset;
+ up_args->promotion_closure.cb = basic_do_promote;
+ up_args->promotion_closure.cb_arg = up_args;
+
+ grpc_closure_list_add(&pollset->idle_jobs, &up_args->promotion_closure, 1);
+ grpc_pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
+
+exit:
+ if (and_unlock_pollset) {
+ gpr_mu_unlock(&pollset->mu);
+ }
+}
+
+static void basic_pollset_maybe_work_and_unlock(grpc_exec_ctx *exec_ctx,
+ grpc_pollset *pollset,
+ grpc_pollset_worker *worker,
+ gpr_timespec deadline,
+ gpr_timespec now) {
+#define POLLOUT_CHECK (POLLOUT | POLLHUP | POLLERR)
+#define POLLIN_CHECK (POLLIN | POLLHUP | POLLERR)
+
+ struct pollfd pfd[3];
+ grpc_fd *fd;
+ grpc_fd_watcher fd_watcher;
+ int timeout;
+ int r;
+ nfds_t nfds;
+
+ fd = pollset->data.ptr;
+ if (fd && grpc_fd_is_orphaned(fd)) {
+ GRPC_FD_UNREF(fd, "basicpoll");
+ fd = pollset->data.ptr = NULL;
+ }
+ timeout = grpc_poll_deadline_to_millis_timeout(deadline, now);
+ pfd[0].fd = GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd);
+ pfd[0].events = POLLIN;
+ pfd[0].revents = 0;
+ pfd[1].fd = GRPC_WAKEUP_FD_GET_READ_FD(&worker->wakeup_fd->fd);
+ pfd[1].events = POLLIN;
+ pfd[1].revents = 0;
+ nfds = 2;
+ if (fd) {
+ pfd[2].fd = fd->fd;
+ pfd[2].revents = 0;
+ GRPC_FD_REF(fd, "basicpoll_begin");
+ gpr_mu_unlock(&pollset->mu);
+ pfd[2].events = (short)grpc_fd_begin_poll(fd, pollset, worker, POLLIN,
+ POLLOUT, &fd_watcher);
+ if (pfd[2].events != 0) {
+ nfds++;
+ }
+ } else {
+ gpr_mu_unlock(&pollset->mu);
+ }
+
+ /* TODO(vpai): Consider first doing a 0 timeout poll here to avoid
+ even going into the blocking annotation if possible */
+ /* poll fd count (argument 2) is shortened by one if we have no events
+ to poll on - such that it only includes the kicker */
+ GPR_TIMER_BEGIN("poll", 0);
+ GRPC_SCHEDULING_START_BLOCKING_REGION;
+ r = grpc_poll_function(pfd, nfds, timeout);
+ GRPC_SCHEDULING_END_BLOCKING_REGION;
+ GPR_TIMER_END("poll", 0);
+
+ if (r < 0) {
+ if (errno != EINTR) {
+ gpr_log(GPR_ERROR, "poll() failed: %s", strerror(errno));
+ }
+ if (fd) {
+ grpc_fd_end_poll(exec_ctx, &fd_watcher, 0, 0);
+ }
+ } else if (r == 0) {
+ if (fd) {
+ grpc_fd_end_poll(exec_ctx, &fd_watcher, 0, 0);
+ }
+ } else {
+ if (pfd[0].revents & POLLIN_CHECK) {
+ grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
+ }
+ if (pfd[1].revents & POLLIN_CHECK) {
+ grpc_wakeup_fd_consume_wakeup(&worker->wakeup_fd->fd);
+ }
+ if (nfds > 2) {
+ grpc_fd_end_poll(exec_ctx, &fd_watcher, pfd[2].revents & POLLIN_CHECK,
+ pfd[2].revents & POLLOUT_CHECK);
+ } else if (fd) {
+ grpc_fd_end_poll(exec_ctx, &fd_watcher, 0, 0);
+ }
+ }
+
+ if (fd) {
+ GRPC_FD_UNREF(fd, "basicpoll_begin");
+ }
+}
+
+static void basic_pollset_destroy(grpc_pollset *pollset) {
+ if (pollset->data.ptr != NULL) {
+ GRPC_FD_UNREF(pollset->data.ptr, "basicpoll");
+ pollset->data.ptr = NULL;
+ }
+}
+
+static const grpc_pollset_vtable basic_pollset = {
+ basic_pollset_add_fd, basic_pollset_maybe_work_and_unlock,
+ basic_pollset_destroy, basic_pollset_destroy};
+
+static void become_basic_pollset(grpc_pollset *pollset, grpc_fd *fd_or_null) {
+ pollset->vtable = &basic_pollset;
+ pollset->data.ptr = fd_or_null;
+ if (fd_or_null != NULL) {
+ GRPC_FD_REF(fd_or_null, "basicpoll");
+ }
+}
+
+#endif /* GPR_POSIX_POLLSET */
diff --git a/src/core/lib/iomgr/pollset_posix.h b/src/core/lib/iomgr/pollset_posix.h
new file mode 100644
index 0000000000..7d8e9fc279
--- /dev/null
+++ b/src/core/lib/iomgr/pollset_posix.h
@@ -0,0 +1,153 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_POLLSET_POSIX_H
+#define GRPC_CORE_LIB_IOMGR_POLLSET_POSIX_H
+
+#include <poll.h>
+
+#include <grpc/support/sync.h>
+
+#include "src/core/lib/iomgr/exec_ctx.h"
+#include "src/core/lib/iomgr/iomgr.h"
+#include "src/core/lib/iomgr/pollset.h"
+#include "src/core/lib/iomgr/wakeup_fd_posix.h"
+
+typedef struct grpc_pollset_vtable grpc_pollset_vtable;
+
+/* forward declare only in this file to avoid leaking impl details via
+ pollset.h; real users of grpc_fd should always include 'fd_posix.h' and not
+ use the struct tag */
+struct grpc_fd;
+
+typedef struct grpc_cached_wakeup_fd {
+ grpc_wakeup_fd fd;
+ struct grpc_cached_wakeup_fd *next;
+} grpc_cached_wakeup_fd;
+
+struct grpc_pollset_worker {
+ grpc_cached_wakeup_fd *wakeup_fd;
+ int reevaluate_polling_on_wakeup;
+ int kicked_specifically;
+ struct grpc_pollset_worker *next;
+ struct grpc_pollset_worker *prev;
+};
+
+struct grpc_pollset {
+ /* pollsets under posix can mutate representation as fds are added and
+ removed.
+ For example, we may choose a poll() based implementation on linux for
+ few fds, and an epoll() based implementation for many fds */
+ const grpc_pollset_vtable *vtable;
+ gpr_mu mu;
+ grpc_pollset_worker root_worker;
+ int in_flight_cbs;
+ int shutting_down;
+ int called_shutdown;
+ int kicked_without_pollers;
+ grpc_closure *shutdown_done;
+ grpc_closure_list idle_jobs;
+ union {
+ int fd;
+ void *ptr;
+ } data;
+ /* Local cache of eventfds for workers */
+ grpc_cached_wakeup_fd *local_wakeup_cache;
+};
+
+struct grpc_pollset_vtable {
+ void (*add_fd)(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+ struct grpc_fd *fd, int and_unlock_pollset);
+ void (*maybe_work_and_unlock)(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+ grpc_pollset_worker *worker,
+ gpr_timespec deadline, gpr_timespec now);
+ void (*finish_shutdown)(grpc_pollset *pollset);
+ void (*destroy)(grpc_pollset *pollset);
+};
+
+/* Add an fd to a pollset */
+void grpc_pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+ struct grpc_fd *fd);
+
+/* Returns the fd to listen on for kicks */
+int grpc_kick_read_fd(grpc_pollset *p);
+/* Call after polling has been kicked to leave the kicked state */
+void grpc_kick_drain(grpc_pollset *p);
+
+/* Convert a timespec to milliseconds:
+ - very small or negative poll times are clamped to zero to do a
+ non-blocking poll (which becomes spin polling)
+ - other small values are rounded up to one millisecond
+ - longer than a millisecond polls are rounded up to the next nearest
+ millisecond to avoid spinning
+ - infinite timeouts are converted to -1 */
+int grpc_poll_deadline_to_millis_timeout(gpr_timespec deadline,
+ gpr_timespec now);
+
+/* Allow kick to wakeup the currently polling worker */
+#define GRPC_POLLSET_CAN_KICK_SELF 1
+/* Force the wakee to repoll when awoken */
+#define GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP 2
+/* As per grpc_pollset_kick, with an extended set of flags (defined above)
+ -- mostly for fd_posix's use. */
+void grpc_pollset_kick_ext(grpc_pollset *p,
+ grpc_pollset_worker *specific_worker,
+ uint32_t flags);
+
+/* turn a pollset into a multipoller: platform specific */
+typedef void (*grpc_platform_become_multipoller_type)(grpc_exec_ctx *exec_ctx,
+ grpc_pollset *pollset,
+ struct grpc_fd **fds,
+ size_t fd_count);
+extern grpc_platform_become_multipoller_type grpc_platform_become_multipoller;
+
+void grpc_poll_become_multipoller(grpc_exec_ctx *exec_ctx,
+ grpc_pollset *pollset, struct grpc_fd **fds,
+ size_t fd_count);
+
+/* Return 1 if the pollset has active threads in grpc_pollset_work (pollset must
+ * be locked) */
+int grpc_pollset_has_workers(grpc_pollset *pollset);
+
+void grpc_remove_fd_from_all_epoll_sets(int fd);
+
+/* override to allow tests to hook poll() usage */
+/* NOTE: Any changes to grpc_poll_function must take place when the gRPC
+ is certainly not doing any polling anywhere.
+ Otherwise, there might be a race between changing the variable and actually
+ doing a polling operation */
+typedef int (*grpc_poll_function_type)(struct pollfd *, nfds_t, int);
+extern grpc_poll_function_type grpc_poll_function;
+extern grpc_wakeup_fd grpc_global_wakeup_fd;
+
+#endif /* GRPC_CORE_LIB_IOMGR_POLLSET_POSIX_H */
diff --git a/src/core/lib/iomgr/pollset_set.h b/src/core/lib/iomgr/pollset_set.h
new file mode 100644
index 0000000000..fb29d692d7
--- /dev/null
+++ b/src/core/lib/iomgr/pollset_set.h
@@ -0,0 +1,61 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_POLLSET_SET_H
+#define GRPC_CORE_LIB_IOMGR_POLLSET_SET_H
+
+#include "src/core/lib/iomgr/pollset.h"
+
+/* A grpc_pollset_set is a set of pollsets that are interested in an
+ action. Adding a pollset to a pollset_set automatically adds any
+ fd's (etc) that have been registered with the set_set to that pollset.
+ Registering fd's automatically adds them to all current pollsets. */
+
+typedef struct grpc_pollset_set grpc_pollset_set;
+
+grpc_pollset_set *grpc_pollset_set_create(void);
+void grpc_pollset_set_destroy(grpc_pollset_set *pollset_set);
+void grpc_pollset_set_add_pollset(grpc_exec_ctx *exec_ctx,
+ grpc_pollset_set *pollset_set,
+ grpc_pollset *pollset);
+void grpc_pollset_set_del_pollset(grpc_exec_ctx *exec_ctx,
+ grpc_pollset_set *pollset_set,
+ grpc_pollset *pollset);
+void grpc_pollset_set_add_pollset_set(grpc_exec_ctx *exec_ctx,
+ grpc_pollset_set *bag,
+ grpc_pollset_set *item);
+void grpc_pollset_set_del_pollset_set(grpc_exec_ctx *exec_ctx,
+ grpc_pollset_set *bag,
+ grpc_pollset_set *item);
+
+#endif /* GRPC_CORE_LIB_IOMGR_POLLSET_SET_H */
diff --git a/src/core/lib/iomgr/pollset_set_posix.c b/src/core/lib/iomgr/pollset_set_posix.c
new file mode 100644
index 0000000000..d6142f9b6b
--- /dev/null
+++ b/src/core/lib/iomgr/pollset_set_posix.c
@@ -0,0 +1,202 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_POSIX_SOCKET
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/useful.h>
+
+#include "src/core/lib/iomgr/pollset_posix.h"
+#include "src/core/lib/iomgr/pollset_set_posix.h"
+
+struct grpc_pollset_set {
+ gpr_mu mu;
+
+ size_t pollset_count;
+ size_t pollset_capacity;
+ grpc_pollset **pollsets;
+
+ size_t pollset_set_count;
+ size_t pollset_set_capacity;
+ struct grpc_pollset_set **pollset_sets;
+
+ size_t fd_count;
+ size_t fd_capacity;
+ grpc_fd **fds;
+};
+
+grpc_pollset_set *grpc_pollset_set_create(void) {
+ grpc_pollset_set *pollset_set = gpr_malloc(sizeof(*pollset_set));
+ memset(pollset_set, 0, sizeof(*pollset_set));
+ gpr_mu_init(&pollset_set->mu);
+ return pollset_set;
+}
+
+void grpc_pollset_set_destroy(grpc_pollset_set *pollset_set) {
+ size_t i;
+ gpr_mu_destroy(&pollset_set->mu);
+ for (i = 0; i < pollset_set->fd_count; i++) {
+ GRPC_FD_UNREF(pollset_set->fds[i], "pollset_set");
+ }
+ gpr_free(pollset_set->pollsets);
+ gpr_free(pollset_set->pollset_sets);
+ gpr_free(pollset_set->fds);
+ gpr_free(pollset_set);
+}
+
+void grpc_pollset_set_add_pollset(grpc_exec_ctx *exec_ctx,
+ grpc_pollset_set *pollset_set,
+ grpc_pollset *pollset) {
+ size_t i, j;
+ gpr_mu_lock(&pollset_set->mu);
+ if (pollset_set->pollset_count == pollset_set->pollset_capacity) {
+ pollset_set->pollset_capacity =
+ GPR_MAX(8, 2 * pollset_set->pollset_capacity);
+ pollset_set->pollsets =
+ gpr_realloc(pollset_set->pollsets, pollset_set->pollset_capacity *
+ sizeof(*pollset_set->pollsets));
+ }
+ pollset_set->pollsets[pollset_set->pollset_count++] = pollset;
+ for (i = 0, j = 0; i < pollset_set->fd_count; i++) {
+ if (grpc_fd_is_orphaned(pollset_set->fds[i])) {
+ GRPC_FD_UNREF(pollset_set->fds[i], "pollset_set");
+ } else {
+ grpc_pollset_add_fd(exec_ctx, pollset, pollset_set->fds[i]);
+ pollset_set->fds[j++] = pollset_set->fds[i];
+ }
+ }
+ pollset_set->fd_count = j;
+ gpr_mu_unlock(&pollset_set->mu);
+}
+
+void grpc_pollset_set_del_pollset(grpc_exec_ctx *exec_ctx,
+ grpc_pollset_set *pollset_set,
+ grpc_pollset *pollset) {
+ size_t i;
+ gpr_mu_lock(&pollset_set->mu);
+ for (i = 0; i < pollset_set->pollset_count; i++) {
+ if (pollset_set->pollsets[i] == pollset) {
+ pollset_set->pollset_count--;
+ GPR_SWAP(grpc_pollset *, pollset_set->pollsets[i],
+ pollset_set->pollsets[pollset_set->pollset_count]);
+ break;
+ }
+ }
+ gpr_mu_unlock(&pollset_set->mu);
+}
+
+void grpc_pollset_set_add_pollset_set(grpc_exec_ctx *exec_ctx,
+ grpc_pollset_set *bag,
+ grpc_pollset_set *item) {
+ size_t i, j;
+ gpr_mu_lock(&bag->mu);
+ if (bag->pollset_set_count == bag->pollset_set_capacity) {
+ bag->pollset_set_capacity = GPR_MAX(8, 2 * bag->pollset_set_capacity);
+ bag->pollset_sets =
+ gpr_realloc(bag->pollset_sets,
+ bag->pollset_set_capacity * sizeof(*bag->pollset_sets));
+ }
+ bag->pollset_sets[bag->pollset_set_count++] = item;
+ for (i = 0, j = 0; i < bag->fd_count; i++) {
+ if (grpc_fd_is_orphaned(bag->fds[i])) {
+ GRPC_FD_UNREF(bag->fds[i], "pollset_set");
+ } else {
+ grpc_pollset_set_add_fd(exec_ctx, item, bag->fds[i]);
+ bag->fds[j++] = bag->fds[i];
+ }
+ }
+ bag->fd_count = j;
+ gpr_mu_unlock(&bag->mu);
+}
+
+void grpc_pollset_set_del_pollset_set(grpc_exec_ctx *exec_ctx,
+ grpc_pollset_set *bag,
+ grpc_pollset_set *item) {
+ size_t i;
+ gpr_mu_lock(&bag->mu);
+ for (i = 0; i < bag->pollset_set_count; i++) {
+ if (bag->pollset_sets[i] == item) {
+ bag->pollset_set_count--;
+ GPR_SWAP(grpc_pollset_set *, bag->pollset_sets[i],
+ bag->pollset_sets[bag->pollset_set_count]);
+ break;
+ }
+ }
+ gpr_mu_unlock(&bag->mu);
+}
+
+void grpc_pollset_set_add_fd(grpc_exec_ctx *exec_ctx,
+ grpc_pollset_set *pollset_set, grpc_fd *fd) {
+ size_t i;
+ gpr_mu_lock(&pollset_set->mu);
+ if (pollset_set->fd_count == pollset_set->fd_capacity) {
+ pollset_set->fd_capacity = GPR_MAX(8, 2 * pollset_set->fd_capacity);
+ pollset_set->fds = gpr_realloc(
+ pollset_set->fds, pollset_set->fd_capacity * sizeof(*pollset_set->fds));
+ }
+ GRPC_FD_REF(fd, "pollset_set");
+ pollset_set->fds[pollset_set->fd_count++] = fd;
+ for (i = 0; i < pollset_set->pollset_count; i++) {
+ grpc_pollset_add_fd(exec_ctx, pollset_set->pollsets[i], fd);
+ }
+ for (i = 0; i < pollset_set->pollset_set_count; i++) {
+ grpc_pollset_set_add_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
+ }
+ gpr_mu_unlock(&pollset_set->mu);
+}
+
+void grpc_pollset_set_del_fd(grpc_exec_ctx *exec_ctx,
+ grpc_pollset_set *pollset_set, grpc_fd *fd) {
+ size_t i;
+ gpr_mu_lock(&pollset_set->mu);
+ for (i = 0; i < pollset_set->fd_count; i++) {
+ if (pollset_set->fds[i] == fd) {
+ pollset_set->fd_count--;
+ GPR_SWAP(grpc_fd *, pollset_set->fds[i],
+ pollset_set->fds[pollset_set->fd_count]);
+ GRPC_FD_UNREF(fd, "pollset_set");
+ break;
+ }
+ }
+ for (i = 0; i < pollset_set->pollset_set_count; i++) {
+ grpc_pollset_set_del_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
+ }
+ gpr_mu_unlock(&pollset_set->mu);
+}
+
+#endif /* GPR_POSIX_SOCKET */
diff --git a/src/core/lib/iomgr/pollset_set_posix.h b/src/core/lib/iomgr/pollset_set_posix.h
new file mode 100644
index 0000000000..4e6b063c6f
--- /dev/null
+++ b/src/core/lib/iomgr/pollset_set_posix.h
@@ -0,0 +1,45 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_POLLSET_SET_POSIX_H
+#define GRPC_CORE_LIB_IOMGR_POLLSET_SET_POSIX_H
+
+#include "src/core/lib/iomgr/fd_posix.h"
+#include "src/core/lib/iomgr/pollset_set.h"
+
+void grpc_pollset_set_add_fd(grpc_exec_ctx *exec_ctx,
+ grpc_pollset_set *pollset_set, grpc_fd *fd);
+void grpc_pollset_set_del_fd(grpc_exec_ctx *exec_ctx,
+ grpc_pollset_set *pollset_set, grpc_fd *fd);
+
+#endif /* GRPC_CORE_LIB_IOMGR_POLLSET_SET_POSIX_H */
diff --git a/src/core/lib/iomgr/pollset_set_windows.c b/src/core/lib/iomgr/pollset_set_windows.c
new file mode 100644
index 0000000000..720fc331ed
--- /dev/null
+++ b/src/core/lib/iomgr/pollset_set_windows.c
@@ -0,0 +1,60 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_WINSOCK_SOCKET
+
+#include "src/core/lib/iomgr/pollset_set_windows.h"
+
+grpc_pollset_set* grpc_pollset_set_create(void) { return NULL; }
+
+void grpc_pollset_set_destroy(grpc_pollset_set* pollset_set) {}
+
+void grpc_pollset_set_add_pollset(grpc_exec_ctx* exec_ctx,
+ grpc_pollset_set* pollset_set,
+ grpc_pollset* pollset) {}
+
+void grpc_pollset_set_del_pollset(grpc_exec_ctx* exec_ctx,
+ grpc_pollset_set* pollset_set,
+ grpc_pollset* pollset) {}
+
+void grpc_pollset_set_add_pollset_set(grpc_exec_ctx* exec_ctx,
+ grpc_pollset_set* bag,
+ grpc_pollset_set* item) {}
+
+void grpc_pollset_set_del_pollset_set(grpc_exec_ctx* exec_ctx,
+ grpc_pollset_set* bag,
+ grpc_pollset_set* item) {}
+
+#endif /* GPR_WINSOCK_SOCKET */
diff --git a/src/core/lib/iomgr/pollset_set_windows.h b/src/core/lib/iomgr/pollset_set_windows.h
new file mode 100644
index 0000000000..7c2cea23de
--- /dev/null
+++ b/src/core/lib/iomgr/pollset_set_windows.h
@@ -0,0 +1,39 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_POLLSET_SET_WINDOWS_H
+#define GRPC_CORE_LIB_IOMGR_POLLSET_SET_WINDOWS_H
+
+#include "src/core/lib/iomgr/pollset_set.h"
+
+#endif /* GRPC_CORE_LIB_IOMGR_POLLSET_SET_WINDOWS_H */
diff --git a/src/core/lib/iomgr/pollset_windows.c b/src/core/lib/iomgr/pollset_windows.c
new file mode 100644
index 0000000000..6b339127a8
--- /dev/null
+++ b/src/core/lib/iomgr/pollset_windows.c
@@ -0,0 +1,240 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_WINSOCK_SOCKET
+
+#include <grpc/support/log.h>
+#include <grpc/support/thd.h>
+
+#include "src/core/lib/iomgr/iocp_windows.h"
+#include "src/core/lib/iomgr/iomgr_internal.h"
+#include "src/core/lib/iomgr/pollset.h"
+#include "src/core/lib/iomgr/pollset_windows.h"
+
+gpr_mu grpc_polling_mu;
+static grpc_pollset_worker *g_active_poller;
+static grpc_pollset_worker g_global_root_worker;
+
+void grpc_pollset_global_init() {
+ gpr_mu_init(&grpc_polling_mu);
+ g_active_poller = NULL;
+ g_global_root_worker.links[GRPC_POLLSET_WORKER_LINK_GLOBAL].next =
+ g_global_root_worker.links[GRPC_POLLSET_WORKER_LINK_GLOBAL].prev =
+ &g_global_root_worker;
+}
+
+void grpc_pollset_global_shutdown() { gpr_mu_destroy(&grpc_polling_mu); }
+
+static void remove_worker(grpc_pollset_worker *worker,
+ grpc_pollset_worker_link_type type) {
+ worker->links[type].prev->links[type].next = worker->links[type].next;
+ worker->links[type].next->links[type].prev = worker->links[type].prev;
+ worker->links[type].next = worker->links[type].prev = worker;
+}
+
+static int has_workers(grpc_pollset_worker *root,
+ grpc_pollset_worker_link_type type) {
+ return root->links[type].next != root;
+}
+
+static grpc_pollset_worker *pop_front_worker(
+ grpc_pollset_worker *root, grpc_pollset_worker_link_type type) {
+ if (has_workers(root, type)) {
+ grpc_pollset_worker *w = root->links[type].next;
+ remove_worker(w, type);
+ return w;
+ } else {
+ return NULL;
+ }
+}
+
+static void push_front_worker(grpc_pollset_worker *root,
+ grpc_pollset_worker_link_type type,
+ grpc_pollset_worker *worker) {
+ worker->links[type].prev = root;
+ worker->links[type].next = worker->links[type].prev->links[type].next;
+ worker->links[type].prev->links[type].next =
+ worker->links[type].next->links[type].prev = worker;
+}
+
+size_t grpc_pollset_size(void) { return sizeof(grpc_pollset); }
+
+/* There isn't really any such thing as a pollset under Windows, due to the
+ nature of the IO completion ports. We're still going to provide a minimal
+ set of features for the sake of the rest of grpc. But grpc_pollset_work
+ won't actually do any polling, and return as quickly as possible. */
+
+void grpc_pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
+ *mu = &grpc_polling_mu;
+ memset(pollset, 0, sizeof(*pollset));
+ pollset->root_worker.links[GRPC_POLLSET_WORKER_LINK_POLLSET].next =
+ pollset->root_worker.links[GRPC_POLLSET_WORKER_LINK_POLLSET].prev =
+ &pollset->root_worker;
+}
+
+void grpc_pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+ grpc_closure *closure) {
+ pollset->shutting_down = 1;
+ grpc_pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
+ if (!pollset->is_iocp_worker) {
+ grpc_exec_ctx_enqueue(exec_ctx, closure, true, NULL);
+ } else {
+ pollset->on_shutdown = closure;
+ }
+}
+
+void grpc_pollset_destroy(grpc_pollset *pollset) {}
+
+void grpc_pollset_reset(grpc_pollset *pollset) {
+ GPR_ASSERT(pollset->shutting_down);
+ GPR_ASSERT(
+ !has_workers(&pollset->root_worker, GRPC_POLLSET_WORKER_LINK_POLLSET));
+ pollset->shutting_down = 0;
+ pollset->is_iocp_worker = 0;
+ pollset->kicked_without_pollers = 0;
+ pollset->on_shutdown = NULL;
+}
+
+void grpc_pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+ grpc_pollset_worker **worker_hdl, gpr_timespec now,
+ gpr_timespec deadline) {
+ grpc_pollset_worker worker;
+ *worker_hdl = &worker;
+
+ int added_worker = 0;
+ worker.links[GRPC_POLLSET_WORKER_LINK_POLLSET].next =
+ worker.links[GRPC_POLLSET_WORKER_LINK_POLLSET].prev =
+ worker.links[GRPC_POLLSET_WORKER_LINK_GLOBAL].next =
+ worker.links[GRPC_POLLSET_WORKER_LINK_GLOBAL].prev = NULL;
+ worker.kicked = 0;
+ worker.pollset = pollset;
+ gpr_cv_init(&worker.cv);
+ if (!pollset->kicked_without_pollers && !pollset->shutting_down) {
+ if (g_active_poller == NULL) {
+ grpc_pollset_worker *next_worker;
+ /* become poller */
+ pollset->is_iocp_worker = 1;
+ g_active_poller = &worker;
+ gpr_mu_unlock(&grpc_polling_mu);
+ grpc_iocp_work(exec_ctx, deadline);
+ grpc_exec_ctx_flush(exec_ctx);
+ gpr_mu_lock(&grpc_polling_mu);
+ pollset->is_iocp_worker = 0;
+ g_active_poller = NULL;
+ /* try to get a worker from this pollsets worker list */
+ next_worker = pop_front_worker(&pollset->root_worker,
+ GRPC_POLLSET_WORKER_LINK_POLLSET);
+ if (next_worker == NULL) {
+ /* try to get a worker from the global list */
+ next_worker = pop_front_worker(&g_global_root_worker,
+ GRPC_POLLSET_WORKER_LINK_GLOBAL);
+ }
+ if (next_worker != NULL) {
+ next_worker->kicked = 1;
+ gpr_cv_signal(&next_worker->cv);
+ }
+
+ if (pollset->shutting_down && pollset->on_shutdown != NULL) {
+ grpc_exec_ctx_enqueue(exec_ctx, pollset->on_shutdown, true, NULL);
+ pollset->on_shutdown = NULL;
+ }
+ goto done;
+ }
+ push_front_worker(&g_global_root_worker, GRPC_POLLSET_WORKER_LINK_GLOBAL,
+ &worker);
+ push_front_worker(&pollset->root_worker, GRPC_POLLSET_WORKER_LINK_POLLSET,
+ &worker);
+ added_worker = 1;
+ while (!worker.kicked) {
+ if (gpr_cv_wait(&worker.cv, &grpc_polling_mu, deadline)) {
+ break;
+ }
+ }
+ } else {
+ pollset->kicked_without_pollers = 0;
+ }
+done:
+ if (!grpc_closure_list_empty(exec_ctx->closure_list)) {
+ gpr_mu_unlock(&grpc_polling_mu);
+ grpc_exec_ctx_flush(exec_ctx);
+ gpr_mu_lock(&grpc_polling_mu);
+ }
+ if (added_worker) {
+ remove_worker(&worker, GRPC_POLLSET_WORKER_LINK_GLOBAL);
+ remove_worker(&worker, GRPC_POLLSET_WORKER_LINK_POLLSET);
+ }
+ gpr_cv_destroy(&worker.cv);
+ *worker_hdl = NULL;
+}
+
+void grpc_pollset_kick(grpc_pollset *p, grpc_pollset_worker *specific_worker) {
+ if (specific_worker != NULL) {
+ if (specific_worker == GRPC_POLLSET_KICK_BROADCAST) {
+ for (specific_worker =
+ p->root_worker.links[GRPC_POLLSET_WORKER_LINK_POLLSET].next;
+ specific_worker != &p->root_worker;
+ specific_worker =
+ specific_worker->links[GRPC_POLLSET_WORKER_LINK_POLLSET].next) {
+ specific_worker->kicked = 1;
+ gpr_cv_signal(&specific_worker->cv);
+ }
+ p->kicked_without_pollers = 1;
+ if (p->is_iocp_worker) {
+ grpc_iocp_kick();
+ }
+ } else {
+ if (p->is_iocp_worker && g_active_poller == specific_worker) {
+ grpc_iocp_kick();
+ } else {
+ specific_worker->kicked = 1;
+ gpr_cv_signal(&specific_worker->cv);
+ }
+ }
+ } else {
+ specific_worker =
+ pop_front_worker(&p->root_worker, GRPC_POLLSET_WORKER_LINK_POLLSET);
+ if (specific_worker != NULL) {
+ grpc_pollset_kick(p, specific_worker);
+ } else if (p->is_iocp_worker) {
+ grpc_iocp_kick();
+ } else {
+ p->kicked_without_pollers = 1;
+ }
+ }
+}
+
+void grpc_kick_poller(void) { grpc_iocp_kick(); }
+
+#endif /* GPR_WINSOCK_SOCKET */
diff --git a/src/core/lib/iomgr/pollset_windows.h b/src/core/lib/iomgr/pollset_windows.h
new file mode 100644
index 0000000000..fa9553ffea
--- /dev/null
+++ b/src/core/lib/iomgr/pollset_windows.h
@@ -0,0 +1,75 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_POLLSET_WINDOWS_H
+#define GRPC_CORE_LIB_IOMGR_POLLSET_WINDOWS_H
+
+#include <grpc/support/sync.h>
+
+#include "src/core/lib/iomgr/socket_windows.h"
+
+/* There isn't really any such thing as a pollset under Windows, due to the
+ nature of the IO completion ports. A Windows "pollset" is merely a mutex
+ used to synchronize with the IOCP, and workers are condition variables
+ used to block threads until work is ready. */
+
+typedef enum {
+ GRPC_POLLSET_WORKER_LINK_POLLSET = 0,
+ GRPC_POLLSET_WORKER_LINK_GLOBAL,
+ GRPC_POLLSET_WORKER_LINK_TYPES
+} grpc_pollset_worker_link_type;
+
+typedef struct grpc_pollset_worker_link {
+ struct grpc_pollset_worker *next;
+ struct grpc_pollset_worker *prev;
+} grpc_pollset_worker_link;
+
+struct grpc_pollset;
+typedef struct grpc_pollset grpc_pollset;
+
+typedef struct grpc_pollset_worker {
+ gpr_cv cv;
+ int kicked;
+ struct grpc_pollset *pollset;
+ grpc_pollset_worker_link links[GRPC_POLLSET_WORKER_LINK_TYPES];
+} grpc_pollset_worker;
+
+struct grpc_pollset {
+ int shutting_down;
+ int kicked_without_pollers;
+ int is_iocp_worker;
+ grpc_pollset_worker root_worker;
+ grpc_closure *on_shutdown;
+};
+
+#endif /* GRPC_CORE_LIB_IOMGR_POLLSET_WINDOWS_H */
diff --git a/src/core/lib/iomgr/resolve_address.h b/src/core/lib/iomgr/resolve_address.h
new file mode 100644
index 0000000000..f748288685
--- /dev/null
+++ b/src/core/lib/iomgr/resolve_address.h
@@ -0,0 +1,72 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_RESOLVE_ADDRESS_H
+#define GRPC_CORE_LIB_IOMGR_RESOLVE_ADDRESS_H
+
+#include <stddef.h>
+#include "src/core/lib/iomgr/exec_ctx.h"
+#include "src/core/lib/iomgr/iomgr.h"
+
+#define GRPC_MAX_SOCKADDR_SIZE 128
+
+typedef struct {
+ char addr[GRPC_MAX_SOCKADDR_SIZE];
+ size_t len;
+} grpc_resolved_address;
+
+typedef struct {
+ size_t naddrs;
+ grpc_resolved_address *addrs;
+} grpc_resolved_addresses;
+
+/* Async result callback:
+ On success: addresses is the result, and the callee must call
+ grpc_resolved_addresses_destroy when it's done with them
+ On failure: addresses is NULL */
+typedef void (*grpc_resolve_cb)(grpc_exec_ctx *exec_ctx, void *arg,
+ grpc_resolved_addresses *addresses);
+/* Asynchronously resolve addr. Use default_port if a port isn't designated
+ in addr, otherwise use the port in addr. */
+/* TODO(ctiller): add a timeout here */
+void grpc_resolve_address(const char *addr, const char *default_port,
+ grpc_resolve_cb cb, void *arg);
+/* Destroy resolved addresses */
+void grpc_resolved_addresses_destroy(grpc_resolved_addresses *addresses);
+
+/* Resolve addr in a blocking fashion. Returns NULL on failure. On success,
+ result must be freed with grpc_resolved_addresses_destroy. */
+extern grpc_resolved_addresses *(*grpc_blocking_resolve_address)(
+ const char *name, const char *default_port);
+
+#endif /* GRPC_CORE_LIB_IOMGR_RESOLVE_ADDRESS_H */
diff --git a/src/core/lib/iomgr/resolve_address_posix.c b/src/core/lib/iomgr/resolve_address_posix.c
new file mode 100644
index 0000000000..ebecb39c16
--- /dev/null
+++ b/src/core/lib/iomgr/resolve_address_posix.c
@@ -0,0 +1,178 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+#ifdef GPR_POSIX_SOCKET
+
+#include "src/core/lib/iomgr/resolve_address.h"
+#include "src/core/lib/iomgr/sockaddr.h"
+
+#include <string.h>
+#include <sys/types.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/host_port.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/thd.h>
+#include <grpc/support/time.h>
+#include <grpc/support/useful.h>
+#include "src/core/lib/iomgr/executor.h"
+#include "src/core/lib/iomgr/iomgr_internal.h"
+#include "src/core/lib/iomgr/sockaddr_utils.h"
+#include "src/core/lib/iomgr/unix_sockets_posix.h"
+#include "src/core/lib/support/block_annotate.h"
+#include "src/core/lib/support/string.h"
+
+typedef struct {
+ char *name;
+ char *default_port;
+ grpc_resolve_cb cb;
+ grpc_closure request_closure;
+ void *arg;
+} request;
+
+static grpc_resolved_addresses *blocking_resolve_address_impl(
+ const char *name, const char *default_port) {
+ struct addrinfo hints;
+ struct addrinfo *result = NULL, *resp;
+ char *host;
+ char *port;
+ int s;
+ size_t i;
+ grpc_resolved_addresses *addrs = NULL;
+
+ if (name[0] == 'u' && name[1] == 'n' && name[2] == 'i' && name[3] == 'x' &&
+ name[4] == ':' && name[5] != 0) {
+ return grpc_resolve_unix_domain_address(name + 5);
+ }
+
+ /* parse name, splitting it into host and port parts */
+ gpr_split_host_port(name, &host, &port);
+ if (host == NULL) {
+ gpr_log(GPR_ERROR, "unparseable host:port: '%s'", name);
+ goto done;
+ }
+ if (port == NULL) {
+ if (default_port == NULL) {
+ gpr_log(GPR_ERROR, "no port in name '%s'", name);
+ goto done;
+ }
+ port = gpr_strdup(default_port);
+ }
+
+ /* Call getaddrinfo */
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = AF_UNSPEC; /* ipv4 or ipv6 */
+ hints.ai_socktype = SOCK_STREAM; /* stream socket */
+ hints.ai_flags = AI_PASSIVE; /* for wildcard IP address */
+
+ GRPC_SCHEDULING_START_BLOCKING_REGION;
+ s = getaddrinfo(host, port, &hints, &result);
+ GRPC_SCHEDULING_END_BLOCKING_REGION;
+
+ if (s != 0) {
+ /* Retry if well-known service name is recognized */
+ char *svc[][2] = {{"http", "80"}, {"https", "443"}};
+ for (i = 0; i < GPR_ARRAY_SIZE(svc); i++) {
+ if (strcmp(port, svc[i][0]) == 0) {
+ GRPC_SCHEDULING_START_BLOCKING_REGION;
+ s = getaddrinfo(host, svc[i][1], &hints, &result);
+ GRPC_SCHEDULING_END_BLOCKING_REGION;
+ break;
+ }
+ }
+ }
+
+ if (s != 0) {
+ gpr_log(GPR_ERROR, "getaddrinfo: %s", gai_strerror(s));
+ goto done;
+ }
+
+ /* Success path: set addrs non-NULL, fill it in */
+ addrs = gpr_malloc(sizeof(grpc_resolved_addresses));
+ addrs->naddrs = 0;
+ for (resp = result; resp != NULL; resp = resp->ai_next) {
+ addrs->naddrs++;
+ }
+ addrs->addrs = gpr_malloc(sizeof(grpc_resolved_address) * addrs->naddrs);
+ i = 0;
+ for (resp = result; resp != NULL; resp = resp->ai_next) {
+ memcpy(&addrs->addrs[i].addr, resp->ai_addr, resp->ai_addrlen);
+ addrs->addrs[i].len = resp->ai_addrlen;
+ i++;
+ }
+
+done:
+ gpr_free(host);
+ gpr_free(port);
+ if (result) {
+ freeaddrinfo(result);
+ }
+ return addrs;
+}
+
+grpc_resolved_addresses *(*grpc_blocking_resolve_address)(
+ const char *name, const char *default_port) = blocking_resolve_address_impl;
+
+/* Callback to be passed to grpc_executor to asynch-ify
+ * grpc_blocking_resolve_address */
+static void do_request_thread(grpc_exec_ctx *exec_ctx, void *rp, bool success) {
+ request *r = rp;
+ grpc_resolved_addresses *resolved =
+ grpc_blocking_resolve_address(r->name, r->default_port);
+ void *arg = r->arg;
+ grpc_resolve_cb cb = r->cb;
+ gpr_free(r->name);
+ gpr_free(r->default_port);
+ cb(exec_ctx, arg, resolved);
+ gpr_free(r);
+}
+
+void grpc_resolved_addresses_destroy(grpc_resolved_addresses *addrs) {
+ gpr_free(addrs->addrs);
+ gpr_free(addrs);
+}
+
+void grpc_resolve_address(const char *name, const char *default_port,
+ grpc_resolve_cb cb, void *arg) {
+ request *r = gpr_malloc(sizeof(request));
+ grpc_closure_init(&r->request_closure, do_request_thread, r);
+ r->name = gpr_strdup(name);
+ r->default_port = gpr_strdup(default_port);
+ r->cb = cb;
+ r->arg = arg;
+ grpc_executor_enqueue(&r->request_closure, 1);
+}
+
+#endif
diff --git a/src/core/lib/iomgr/resolve_address_windows.c b/src/core/lib/iomgr/resolve_address_windows.c
new file mode 100644
index 0000000000..bde1f1b7f7
--- /dev/null
+++ b/src/core/lib/iomgr/resolve_address_windows.c
@@ -0,0 +1,169 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+#ifdef GPR_WINSOCK_SOCKET
+
+#include "src/core/lib/iomgr/resolve_address.h"
+#include "src/core/lib/iomgr/sockaddr.h"
+
+#include <string.h>
+#include <sys/types.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/host_port.h>
+#include <grpc/support/log.h>
+#include <grpc/support/log_win32.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/thd.h>
+#include <grpc/support/time.h>
+#include "src/core/lib/iomgr/executor.h"
+#include "src/core/lib/iomgr/iomgr_internal.h"
+#include "src/core/lib/iomgr/sockaddr_utils.h"
+#include "src/core/lib/support/block_annotate.h"
+#include "src/core/lib/support/string.h"
+
+typedef struct {
+ char *name;
+ char *default_port;
+ grpc_resolve_cb cb;
+ grpc_closure request_closure;
+ void *arg;
+} request;
+
+static grpc_resolved_addresses *blocking_resolve_address_impl(
+ const char *name, const char *default_port) {
+ struct addrinfo hints;
+ struct addrinfo *result = NULL, *resp;
+ char *host;
+ char *port;
+ int s;
+ size_t i;
+ grpc_resolved_addresses *addrs = NULL;
+
+ /* parse name, splitting it into host and port parts */
+ gpr_split_host_port(name, &host, &port);
+ if (host == NULL) {
+ gpr_log(GPR_ERROR, "unparseable host:port: '%s'", name);
+ goto done;
+ }
+ if (port == NULL) {
+ if (default_port == NULL) {
+ gpr_log(GPR_ERROR, "no port in name '%s'", name);
+ goto done;
+ }
+ port = gpr_strdup(default_port);
+ }
+
+ /* Call getaddrinfo */
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = AF_UNSPEC; /* ipv4 or ipv6 */
+ hints.ai_socktype = SOCK_STREAM; /* stream socket */
+ hints.ai_flags = AI_PASSIVE; /* for wildcard IP address */
+
+ GRPC_SCHEDULING_START_BLOCKING_REGION;
+ s = getaddrinfo(host, port, &hints, &result);
+ GRPC_SCHEDULING_END_BLOCKING_REGION;
+ if (s != 0) {
+ char *error_message = gpr_format_message(s);
+ gpr_log(GPR_ERROR, "getaddrinfo: %s", error_message);
+ gpr_free(error_message);
+ goto done;
+ }
+
+ /* Success path: set addrs non-NULL, fill it in */
+ addrs = gpr_malloc(sizeof(grpc_resolved_addresses));
+ addrs->naddrs = 0;
+ for (resp = result; resp != NULL; resp = resp->ai_next) {
+ addrs->naddrs++;
+ }
+ addrs->addrs = gpr_malloc(sizeof(grpc_resolved_address) * addrs->naddrs);
+ i = 0;
+ for (resp = result; resp != NULL; resp = resp->ai_next) {
+ memcpy(&addrs->addrs[i].addr, resp->ai_addr, resp->ai_addrlen);
+ addrs->addrs[i].len = resp->ai_addrlen;
+ i++;
+ }
+
+ {
+ for (i = 0; i < addrs->naddrs; i++) {
+ char *buf;
+ grpc_sockaddr_to_string(&buf, (struct sockaddr *)&addrs->addrs[i].addr,
+ 0);
+ gpr_free(buf);
+ }
+ }
+
+done:
+ gpr_free(host);
+ gpr_free(port);
+ if (result) {
+ freeaddrinfo(result);
+ }
+ return addrs;
+}
+
+grpc_resolved_addresses *(*grpc_blocking_resolve_address)(
+ const char *name, const char *default_port) = blocking_resolve_address_impl;
+
+/* Callback to be passed to grpc_executor to asynch-ify
+ * grpc_blocking_resolve_address */
+static void do_request_thread(grpc_exec_ctx *exec_ctx, void *rp, bool success) {
+ request *r = rp;
+ grpc_resolved_addresses *resolved =
+ grpc_blocking_resolve_address(r->name, r->default_port);
+ void *arg = r->arg;
+ grpc_resolve_cb cb = r->cb;
+ gpr_free(r->name);
+ gpr_free(r->default_port);
+ cb(exec_ctx, arg, resolved);
+ gpr_free(r);
+}
+
+void grpc_resolved_addresses_destroy(grpc_resolved_addresses *addrs) {
+ gpr_free(addrs->addrs);
+ gpr_free(addrs);
+}
+
+void grpc_resolve_address(const char *name, const char *default_port,
+ grpc_resolve_cb cb, void *arg) {
+ request *r = gpr_malloc(sizeof(request));
+ grpc_closure_init(&r->request_closure, do_request_thread, r);
+ r->name = gpr_strdup(name);
+ r->default_port = gpr_strdup(default_port);
+ r->cb = cb;
+ r->arg = arg;
+ grpc_executor_enqueue(&r->request_closure, 1);
+}
+
+#endif
diff --git a/src/core/lib/iomgr/sockaddr.h b/src/core/lib/iomgr/sockaddr.h
new file mode 100644
index 0000000000..66a930ee6a
--- /dev/null
+++ b/src/core/lib/iomgr/sockaddr.h
@@ -0,0 +1,47 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_SOCKADDR_H
+#define GRPC_CORE_LIB_IOMGR_SOCKADDR_H
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_WIN32
+#include "src/core/lib/iomgr/sockaddr_win32.h"
+#endif
+
+#ifdef GPR_POSIX_SOCKETADDR
+#include "src/core/lib/iomgr/sockaddr_posix.h"
+#endif
+
+#endif /* GRPC_CORE_LIB_IOMGR_SOCKADDR_H */
diff --git a/src/core/lib/iomgr/sockaddr_posix.h b/src/core/lib/iomgr/sockaddr_posix.h
new file mode 100644
index 0000000000..79a7467c5d
--- /dev/null
+++ b/src/core/lib/iomgr/sockaddr_posix.h
@@ -0,0 +1,44 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_SOCKADDR_POSIX_H
+#define GRPC_CORE_LIB_IOMGR_SOCKADDR_POSIX_H
+
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#endif /* GRPC_CORE_LIB_IOMGR_SOCKADDR_POSIX_H */
diff --git a/src/core/lib/iomgr/sockaddr_utils.c b/src/core/lib/iomgr/sockaddr_utils.c
new file mode 100644
index 0000000000..127d95c618
--- /dev/null
+++ b/src/core/lib/iomgr/sockaddr_utils.c
@@ -0,0 +1,227 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/iomgr/sockaddr_utils.h"
+
+#include <errno.h>
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/host_port.h>
+#include <grpc/support/log.h>
+#include <grpc/support/port_platform.h>
+#include <grpc/support/string_util.h>
+
+#include "src/core/lib/iomgr/unix_sockets_posix.h"
+#include "src/core/lib/support/string.h"
+
+static const uint8_t kV4MappedPrefix[] = {0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0xff, 0xff};
+
+int grpc_sockaddr_is_v4mapped(const struct sockaddr *addr,
+ struct sockaddr_in *addr4_out) {
+ GPR_ASSERT(addr != (struct sockaddr *)addr4_out);
+ if (addr->sa_family == AF_INET6) {
+ const struct sockaddr_in6 *addr6 = (const struct sockaddr_in6 *)addr;
+ if (memcmp(addr6->sin6_addr.s6_addr, kV4MappedPrefix,
+ sizeof(kV4MappedPrefix)) == 0) {
+ if (addr4_out != NULL) {
+ /* Normalize ::ffff:0.0.0.0/96 to IPv4. */
+ memset(addr4_out, 0, sizeof(*addr4_out));
+ addr4_out->sin_family = AF_INET;
+ /* s6_addr32 would be nice, but it's non-standard. */
+ memcpy(&addr4_out->sin_addr, &addr6->sin6_addr.s6_addr[12], 4);
+ addr4_out->sin_port = addr6->sin6_port;
+ }
+ return 1;
+ }
+ }
+ return 0;
+}
+
+int grpc_sockaddr_to_v4mapped(const struct sockaddr *addr,
+ struct sockaddr_in6 *addr6_out) {
+ GPR_ASSERT(addr != (struct sockaddr *)addr6_out);
+ if (addr->sa_family == AF_INET) {
+ const struct sockaddr_in *addr4 = (const struct sockaddr_in *)addr;
+ memset(addr6_out, 0, sizeof(*addr6_out));
+ addr6_out->sin6_family = AF_INET6;
+ memcpy(&addr6_out->sin6_addr.s6_addr[0], kV4MappedPrefix, 12);
+ memcpy(&addr6_out->sin6_addr.s6_addr[12], &addr4->sin_addr, 4);
+ addr6_out->sin6_port = addr4->sin_port;
+ return 1;
+ }
+ return 0;
+}
+
+int grpc_sockaddr_is_wildcard(const struct sockaddr *addr, int *port_out) {
+ struct sockaddr_in addr4_normalized;
+ if (grpc_sockaddr_is_v4mapped(addr, &addr4_normalized)) {
+ addr = (struct sockaddr *)&addr4_normalized;
+ }
+ if (addr->sa_family == AF_INET) {
+ /* Check for 0.0.0.0 */
+ const struct sockaddr_in *addr4 = (const struct sockaddr_in *)addr;
+ if (addr4->sin_addr.s_addr != 0) {
+ return 0;
+ }
+ *port_out = ntohs(addr4->sin_port);
+ return 1;
+ } else if (addr->sa_family == AF_INET6) {
+ /* Check for :: */
+ const struct sockaddr_in6 *addr6 = (const struct sockaddr_in6 *)addr;
+ int i;
+ for (i = 0; i < 16; i++) {
+ if (addr6->sin6_addr.s6_addr[i] != 0) {
+ return 0;
+ }
+ }
+ *port_out = ntohs(addr6->sin6_port);
+ return 1;
+ } else {
+ return 0;
+ }
+}
+
+void grpc_sockaddr_make_wildcards(int port, struct sockaddr_in *wild4_out,
+ struct sockaddr_in6 *wild6_out) {
+ grpc_sockaddr_make_wildcard4(port, wild4_out);
+ grpc_sockaddr_make_wildcard6(port, wild6_out);
+}
+
+void grpc_sockaddr_make_wildcard4(int port, struct sockaddr_in *wild_out) {
+ GPR_ASSERT(port >= 0 && port < 65536);
+ memset(wild_out, 0, sizeof(*wild_out));
+ wild_out->sin_family = AF_INET;
+ wild_out->sin_port = htons((uint16_t)port);
+}
+
+void grpc_sockaddr_make_wildcard6(int port, struct sockaddr_in6 *wild_out) {
+ GPR_ASSERT(port >= 0 && port < 65536);
+ memset(wild_out, 0, sizeof(*wild_out));
+ wild_out->sin6_family = AF_INET6;
+ wild_out->sin6_port = htons((uint16_t)port);
+}
+
+int grpc_sockaddr_to_string(char **out, const struct sockaddr *addr,
+ int normalize) {
+ const int save_errno = errno;
+ struct sockaddr_in addr_normalized;
+ char ntop_buf[INET6_ADDRSTRLEN];
+ const void *ip = NULL;
+ int port;
+ int ret;
+
+ *out = NULL;
+ if (normalize && grpc_sockaddr_is_v4mapped(addr, &addr_normalized)) {
+ addr = (const struct sockaddr *)&addr_normalized;
+ }
+ if (addr->sa_family == AF_INET) {
+ const struct sockaddr_in *addr4 = (const struct sockaddr_in *)addr;
+ ip = &addr4->sin_addr;
+ port = ntohs(addr4->sin_port);
+ } else if (addr->sa_family == AF_INET6) {
+ const struct sockaddr_in6 *addr6 = (const struct sockaddr_in6 *)addr;
+ ip = &addr6->sin6_addr;
+ port = ntohs(addr6->sin6_port);
+ }
+ /* Windows inet_ntop wants a mutable ip pointer */
+ if (ip != NULL &&
+ inet_ntop(addr->sa_family, (void *)ip, ntop_buf, sizeof(ntop_buf)) !=
+ NULL) {
+ ret = gpr_join_host_port(out, ntop_buf, port);
+ } else {
+ ret = gpr_asprintf(out, "(sockaddr family=%d)", addr->sa_family);
+ }
+ /* This is probably redundant, but we wouldn't want to log the wrong error. */
+ errno = save_errno;
+ return ret;
+}
+
+char *grpc_sockaddr_to_uri(const struct sockaddr *addr) {
+ char *temp;
+ char *result;
+ struct sockaddr_in addr_normalized;
+
+ if (grpc_sockaddr_is_v4mapped(addr, &addr_normalized)) {
+ addr = (const struct sockaddr *)&addr_normalized;
+ }
+
+ switch (addr->sa_family) {
+ case AF_INET:
+ grpc_sockaddr_to_string(&temp, addr, 0);
+ gpr_asprintf(&result, "ipv4:%s", temp);
+ gpr_free(temp);
+ return result;
+ case AF_INET6:
+ grpc_sockaddr_to_string(&temp, addr, 0);
+ gpr_asprintf(&result, "ipv6:%s", temp);
+ gpr_free(temp);
+ return result;
+ default:
+ return grpc_sockaddr_to_uri_unix_if_possible(addr);
+ }
+}
+
+int grpc_sockaddr_get_port(const struct sockaddr *addr) {
+ switch (addr->sa_family) {
+ case AF_INET:
+ return ntohs(((struct sockaddr_in *)addr)->sin_port);
+ case AF_INET6:
+ return ntohs(((struct sockaddr_in6 *)addr)->sin6_port);
+ default:
+ if (grpc_is_unix_socket(addr)) {
+ return 1;
+ }
+ gpr_log(GPR_ERROR, "Unknown socket family %d in grpc_sockaddr_get_port",
+ addr->sa_family);
+ return 0;
+ }
+}
+
+int grpc_sockaddr_set_port(const struct sockaddr *addr, int port) {
+ switch (addr->sa_family) {
+ case AF_INET:
+ GPR_ASSERT(port >= 0 && port < 65536);
+ ((struct sockaddr_in *)addr)->sin_port = htons((uint16_t)port);
+ return 1;
+ case AF_INET6:
+ GPR_ASSERT(port >= 0 && port < 65536);
+ ((struct sockaddr_in6 *)addr)->sin6_port = htons((uint16_t)port);
+ return 1;
+ default:
+ gpr_log(GPR_ERROR, "Unknown socket family %d in grpc_sockaddr_set_port",
+ addr->sa_family);
+ return 0;
+ }
+}
diff --git a/src/core/lib/iomgr/sockaddr_utils.h b/src/core/lib/iomgr/sockaddr_utils.h
new file mode 100644
index 0000000000..20a3e3bec3
--- /dev/null
+++ b/src/core/lib/iomgr/sockaddr_utils.h
@@ -0,0 +1,89 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_SOCKADDR_UTILS_H
+#define GRPC_CORE_LIB_IOMGR_SOCKADDR_UTILS_H
+
+#include "src/core/lib/iomgr/sockaddr.h"
+
+/* Returns true if addr is an IPv4-mapped IPv6 address within the
+ ::ffff:0.0.0.0/96 range, or false otherwise.
+
+ If addr4_out is non-NULL, the inner IPv4 address will be copied here when
+ returning true. */
+int grpc_sockaddr_is_v4mapped(const struct sockaddr *addr,
+ struct sockaddr_in *addr4_out);
+
+/* If addr is an AF_INET address, writes the corresponding ::ffff:0.0.0.0/96
+ address to addr6_out and returns true. Otherwise returns false. */
+int grpc_sockaddr_to_v4mapped(const struct sockaddr *addr,
+ struct sockaddr_in6 *addr6_out);
+
+/* If addr is ::, 0.0.0.0, or ::ffff:0.0.0.0, writes the port number to
+ *port_out (if not NULL) and returns true, otherwise returns false. */
+int grpc_sockaddr_is_wildcard(const struct sockaddr *addr, int *port_out);
+
+/* Writes 0.0.0.0:port and [::]:port to separate sockaddrs. */
+void grpc_sockaddr_make_wildcards(int port, struct sockaddr_in *wild4_out,
+ struct sockaddr_in6 *wild6_out);
+
+/* Writes 0.0.0.0:port. */
+void grpc_sockaddr_make_wildcard4(int port, struct sockaddr_in *wild_out);
+
+/* Writes [::]:port. */
+void grpc_sockaddr_make_wildcard6(int port, struct sockaddr_in6 *wild_out);
+
+/* Return the IP port number of a sockaddr */
+int grpc_sockaddr_get_port(const struct sockaddr *addr);
+
+/* Set IP port number of a sockaddr */
+int grpc_sockaddr_set_port(const struct sockaddr *addr, int port);
+
+/* Converts a sockaddr into a newly-allocated human-readable string.
+
+ Currently, only the AF_INET and AF_INET6 families are recognized.
+ If the normalize flag is enabled, ::ffff:0.0.0.0/96 IPv6 addresses are
+ displayed as plain IPv4.
+
+ Usage is similar to gpr_asprintf: returns the number of bytes written
+ (excluding the final '\0'), and *out points to a string which must later be
+ destroyed using gpr_free().
+
+ In the unlikely event of an error, returns -1 and sets *out to NULL.
+ The existing value of errno is always preserved. */
+int grpc_sockaddr_to_string(char **out, const struct sockaddr *addr,
+ int normalize);
+
+char *grpc_sockaddr_to_uri(const struct sockaddr *addr);
+
+#endif /* GRPC_CORE_LIB_IOMGR_SOCKADDR_UTILS_H */
diff --git a/src/core/lib/iomgr/sockaddr_win32.h b/src/core/lib/iomgr/sockaddr_win32.h
new file mode 100644
index 0000000000..2dd7111240
--- /dev/null
+++ b/src/core/lib/iomgr/sockaddr_win32.h
@@ -0,0 +1,43 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_SOCKADDR_WIN32_H
+#define GRPC_CORE_LIB_IOMGR_SOCKADDR_WIN32_H
+
+#include <winsock2.h>
+#include <ws2tcpip.h>
+
+// must be included after the above
+#include <mswsock.h>
+
+#endif /* GRPC_CORE_LIB_IOMGR_SOCKADDR_WIN32_H */
diff --git a/src/core/lib/iomgr/socket_utils_common_posix.c b/src/core/lib/iomgr/socket_utils_common_posix.c
new file mode 100644
index 0000000000..b433aee7fa
--- /dev/null
+++ b/src/core/lib/iomgr/socket_utils_common_posix.c
@@ -0,0 +1,230 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_POSIX_SOCKET
+
+#include "src/core/lib/iomgr/socket_utils_posix.h"
+
+#include <arpa/inet.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <grpc/support/host_port.h>
+#include <grpc/support/log.h>
+#include <grpc/support/port_platform.h>
+#include <grpc/support/sync.h>
+#include "src/core/lib/iomgr/sockaddr_utils.h"
+#include "src/core/lib/support/string.h"
+
+/* set a socket to non blocking mode */
+int grpc_set_socket_nonblocking(int fd, int non_blocking) {
+ int oldflags = fcntl(fd, F_GETFL, 0);
+ if (oldflags < 0) {
+ return 0;
+ }
+
+ if (non_blocking) {
+ oldflags |= O_NONBLOCK;
+ } else {
+ oldflags &= ~O_NONBLOCK;
+ }
+
+ if (fcntl(fd, F_SETFL, oldflags) != 0) {
+ return 0;
+ }
+
+ return 1;
+}
+
+int grpc_set_socket_no_sigpipe_if_possible(int fd) {
+#ifdef GPR_HAVE_SO_NOSIGPIPE
+ int val = 1;
+ int newval;
+ socklen_t intlen = sizeof(newval);
+ return 0 == setsockopt(fd, SOL_SOCKET, SO_NOSIGPIPE, &val, sizeof(val)) &&
+ 0 == getsockopt(fd, SOL_SOCKET, SO_NOSIGPIPE, &newval, &intlen) &&
+ (newval != 0) == val;
+#else
+ return 1;
+#endif
+}
+
+int grpc_set_socket_ip_pktinfo_if_possible(int fd) {
+#ifdef GPR_HAVE_IP_PKTINFO
+ int get_local_ip = 1;
+ return 0 == setsockopt(fd, IPPROTO_IP, IP_PKTINFO, &get_local_ip,
+ sizeof(get_local_ip));
+#else
+ (void)fd;
+ return 1;
+#endif
+}
+
+int grpc_set_socket_ipv6_recvpktinfo_if_possible(int fd) {
+#ifdef GPR_HAVE_IPV6_RECVPKTINFO
+ int get_local_ip = 1;
+ return 0 == setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &get_local_ip,
+ sizeof(get_local_ip));
+#else
+ (void)fd;
+ return 1;
+#endif
+}
+
+/* set a socket to close on exec */
+int grpc_set_socket_cloexec(int fd, int close_on_exec) {
+ int oldflags = fcntl(fd, F_GETFD, 0);
+ if (oldflags < 0) {
+ return 0;
+ }
+
+ if (close_on_exec) {
+ oldflags |= FD_CLOEXEC;
+ } else {
+ oldflags &= ~FD_CLOEXEC;
+ }
+
+ if (fcntl(fd, F_SETFD, oldflags) != 0) {
+ return 0;
+ }
+
+ return 1;
+}
+
+/* set a socket to reuse old addresses */
+int grpc_set_socket_reuse_addr(int fd, int reuse) {
+ int val = (reuse != 0);
+ int newval;
+ socklen_t intlen = sizeof(newval);
+ return 0 == setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)) &&
+ 0 == getsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &newval, &intlen) &&
+ (newval != 0) == val;
+}
+
+/* disable nagle */
+int grpc_set_socket_low_latency(int fd, int low_latency) {
+ int val = (low_latency != 0);
+ int newval;
+ socklen_t intlen = sizeof(newval);
+ return 0 == setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val)) &&
+ 0 == getsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &newval, &intlen) &&
+ (newval != 0) == val;
+}
+
+static gpr_once g_probe_ipv6_once = GPR_ONCE_INIT;
+static int g_ipv6_loopback_available;
+
+static void probe_ipv6_once(void) {
+ int fd = socket(AF_INET6, SOCK_STREAM, 0);
+ g_ipv6_loopback_available = 0;
+ if (fd < 0) {
+ gpr_log(GPR_INFO, "Disabling AF_INET6 sockets because socket() failed.");
+ } else {
+ struct sockaddr_in6 addr;
+ memset(&addr, 0, sizeof(addr));
+ addr.sin6_family = AF_INET6;
+ addr.sin6_addr.s6_addr[15] = 1; /* [::1]:0 */
+ if (bind(fd, (struct sockaddr *)&addr, sizeof(addr)) == 0) {
+ g_ipv6_loopback_available = 1;
+ } else {
+ gpr_log(GPR_INFO,
+ "Disabling AF_INET6 sockets because ::1 is not available.");
+ }
+ close(fd);
+ }
+}
+
+int grpc_ipv6_loopback_available(void) {
+ gpr_once_init(&g_probe_ipv6_once, probe_ipv6_once);
+ return g_ipv6_loopback_available;
+}
+
+/* This should be 0 in production, but it may be enabled for testing or
+ debugging purposes, to simulate an environment where IPv6 sockets can't
+ also speak IPv4. */
+int grpc_forbid_dualstack_sockets_for_testing = 0;
+
+static int set_socket_dualstack(int fd) {
+ if (!grpc_forbid_dualstack_sockets_for_testing) {
+ const int off = 0;
+ return 0 == setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &off, sizeof(off));
+ } else {
+ /* Force an IPv6-only socket, for testing purposes. */
+ const int on = 1;
+ setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on));
+ return 0;
+ }
+}
+
+int grpc_create_dualstack_socket(const struct sockaddr *addr, int type,
+ int protocol, grpc_dualstack_mode *dsmode) {
+ int family = addr->sa_family;
+ if (family == AF_INET6) {
+ int fd;
+ if (grpc_ipv6_loopback_available()) {
+ fd = socket(family, type, protocol);
+ } else {
+ fd = -1;
+ errno = EAFNOSUPPORT;
+ }
+ /* Check if we've got a valid dualstack socket. */
+ if (fd >= 0 && set_socket_dualstack(fd)) {
+ *dsmode = GRPC_DSMODE_DUALSTACK;
+ return fd;
+ }
+ /* If this isn't an IPv4 address, then return whatever we've got. */
+ if (!grpc_sockaddr_is_v4mapped(addr, NULL)) {
+ *dsmode = GRPC_DSMODE_IPV6;
+ return fd;
+ }
+ /* Fall back to AF_INET. */
+ if (fd >= 0) {
+ close(fd);
+ }
+ family = AF_INET;
+ }
+ *dsmode = family == AF_INET ? GRPC_DSMODE_IPV4 : GRPC_DSMODE_NONE;
+ return socket(family, type, protocol);
+}
+
+#endif
diff --git a/src/core/lib/iomgr/socket_utils_linux.c b/src/core/lib/iomgr/socket_utils_linux.c
new file mode 100644
index 0000000000..e7dfe892ca
--- /dev/null
+++ b/src/core/lib/iomgr/socket_utils_linux.c
@@ -0,0 +1,51 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_LINUX_SOCKETUTILS
+
+#include "src/core/lib/iomgr/socket_utils_posix.h"
+
+#include <sys/socket.h>
+#include <sys/types.h>
+
+int grpc_accept4(int sockfd, struct sockaddr *addr, socklen_t *addrlen,
+ int nonblock, int cloexec) {
+ int flags = 0;
+ flags |= nonblock ? SOCK_NONBLOCK : 0;
+ flags |= cloexec ? SOCK_CLOEXEC : 0;
+ return accept4(sockfd, addr, addrlen, flags);
+}
+
+#endif
diff --git a/src/core/lib/iomgr/socket_utils_posix.c b/src/core/lib/iomgr/socket_utils_posix.c
new file mode 100644
index 0000000000..b2fa00c5c1
--- /dev/null
+++ b/src/core/lib/iomgr/socket_utils_posix.c
@@ -0,0 +1,70 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_POSIX_SOCKETUTILS
+
+#include "src/core/lib/iomgr/socket_utils_posix.h"
+
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+#include <grpc/support/log.h>
+
+int grpc_accept4(int sockfd, struct sockaddr *addr, socklen_t *addrlen,
+ int nonblock, int cloexec) {
+ int fd, flags;
+
+ fd = accept(sockfd, addr, addrlen);
+ if (fd >= 0) {
+ if (nonblock) {
+ flags = fcntl(fd, F_GETFL, 0);
+ if (flags < 0) goto close_and_error;
+ if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) != 0) goto close_and_error;
+ }
+ if (cloexec) {
+ flags = fcntl(fd, F_GETFD, 0);
+ if (flags < 0) goto close_and_error;
+ if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) != 0) goto close_and_error;
+ }
+ }
+ return fd;
+
+close_and_error:
+ close(fd);
+ return -1;
+}
+
+#endif /* GPR_POSIX_SOCKETUTILS */
diff --git a/src/core/lib/iomgr/socket_utils_posix.h b/src/core/lib/iomgr/socket_utils_posix.h
new file mode 100644
index 0000000000..f73ad6317d
--- /dev/null
+++ b/src/core/lib/iomgr/socket_utils_posix.h
@@ -0,0 +1,123 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_SOCKET_UTILS_POSIX_H
+#define GRPC_CORE_LIB_IOMGR_SOCKET_UTILS_POSIX_H
+
+#include <sys/socket.h>
+#include <unistd.h>
+
+/* a wrapper for accept or accept4 */
+int grpc_accept4(int sockfd, struct sockaddr *addr, socklen_t *addrlen,
+ int nonblock, int cloexec);
+
+/* set a socket to non blocking mode */
+int grpc_set_socket_nonblocking(int fd, int non_blocking);
+
+/* set a socket to close on exec */
+int grpc_set_socket_cloexec(int fd, int close_on_exec);
+
+/* set a socket to reuse old addresses */
+int grpc_set_socket_reuse_addr(int fd, int reuse);
+
+/* disable nagle */
+int grpc_set_socket_low_latency(int fd, int low_latency);
+
+/* Returns true if this system can create AF_INET6 sockets bound to ::1.
+ The value is probed once, and cached for the life of the process.
+
+ This is more restrictive than checking for socket(AF_INET6) to succeed,
+ because Linux with "net.ipv6.conf.all.disable_ipv6 = 1" is able to create
+ and bind IPv6 sockets, but cannot connect to a getsockname() of [::]:port
+ without a valid loopback interface. Rather than expose this half-broken
+ state to library users, we turn off IPv6 sockets. */
+int grpc_ipv6_loopback_available(void);
+
+/* Tries to set SO_NOSIGPIPE if available on this platform.
+ Returns 1 on success, 0 on failure.
+ If SO_NO_SIGPIPE is not available, returns 1. */
+int grpc_set_socket_no_sigpipe_if_possible(int fd);
+
+/* Tries to set IP_PKTINFO if available on this platform.
+ Returns 1 on success, 0 on failure.
+ If IP_PKTINFO is not available, returns 1. */
+int grpc_set_socket_ip_pktinfo_if_possible(int fd);
+
+/* Tries to set IPV6_RECVPKTINFO if available on this platform.
+ Returns 1 on success, 0 on failure.
+ If IPV6_RECVPKTINFO is not available, returns 1. */
+int grpc_set_socket_ipv6_recvpktinfo_if_possible(int fd);
+
+/* An enum to keep track of IPv4/IPv6 socket modes.
+
+ Currently, this information is only used when a socket is first created, but
+ in the future we may wish to store it alongside the fd. This would let calls
+ like sendto() know which family to use without asking the kernel first. */
+typedef enum grpc_dualstack_mode {
+ /* Uninitialized, or a non-IP socket. */
+ GRPC_DSMODE_NONE,
+ /* AF_INET only. */
+ GRPC_DSMODE_IPV4,
+ /* AF_INET6 only, because IPV6_V6ONLY could not be cleared. */
+ GRPC_DSMODE_IPV6,
+ /* AF_INET6, which also supports ::ffff-mapped IPv4 addresses. */
+ GRPC_DSMODE_DUALSTACK
+} grpc_dualstack_mode;
+
+/* Only tests should use this flag. */
+extern int grpc_forbid_dualstack_sockets_for_testing;
+
+/* Creates a new socket for connecting to (or listening on) an address.
+
+ If addr is AF_INET6, this creates an IPv6 socket first. If that fails,
+ and addr is within ::ffff:0.0.0.0/96, then it automatically falls back to
+ an IPv4 socket.
+
+ If addr is AF_INET, AF_UNIX, or anything else, then this is similar to
+ calling socket() directly.
+
+ Returns an fd on success, otherwise returns -1 with errno set to the result
+ of a failed socket() call.
+
+ The *dsmode output indicates which address family was actually created.
+ The recommended way to use this is:
+ - First convert to IPv6 using grpc_sockaddr_to_v4mapped().
+ - Create the socket.
+ - If *dsmode is IPV4, use grpc_sockaddr_is_v4mapped() to convert back to
+ IPv4, so that bind() or connect() see the correct family.
+ Also, it's important to distinguish between DUALSTACK and IPV6 when
+ listening on the [::] wildcard address. */
+int grpc_create_dualstack_socket(const struct sockaddr *addr, int type,
+ int protocol, grpc_dualstack_mode *dsmode);
+
+#endif /* GRPC_CORE_LIB_IOMGR_SOCKET_UTILS_POSIX_H */
diff --git a/src/core/lib/iomgr/socket_windows.c b/src/core/lib/iomgr/socket_windows.c
new file mode 100644
index 0000000000..1023a6d4f8
--- /dev/null
+++ b/src/core/lib/iomgr/socket_windows.c
@@ -0,0 +1,100 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_WINSOCK_SOCKET
+
+#include <winsock2.h>
+
+// must be included after winsock2.h
+#include <mswsock.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/log_win32.h>
+#include <grpc/support/string_util.h>
+
+#include "src/core/lib/iomgr/iocp_windows.h"
+#include "src/core/lib/iomgr/iomgr_internal.h"
+#include "src/core/lib/iomgr/pollset.h"
+#include "src/core/lib/iomgr/pollset_windows.h"
+#include "src/core/lib/iomgr/socket_windows.h"
+
+grpc_winsocket *grpc_winsocket_create(SOCKET socket, const char *name) {
+ char *final_name;
+ grpc_winsocket *r = gpr_malloc(sizeof(grpc_winsocket));
+ memset(r, 0, sizeof(grpc_winsocket));
+ r->socket = socket;
+ gpr_mu_init(&r->state_mu);
+ gpr_asprintf(&final_name, "%s:socket=0x%p", name, r);
+ grpc_iomgr_register_object(&r->iomgr_object, final_name);
+ gpr_free(final_name);
+ grpc_iocp_add_socket(r);
+ return r;
+}
+
+/* Schedule a shutdown of the socket operations. Will call the pending
+ operations to abort them. We need to do that this way because of the
+ various callsites of that function, which happens to be in various
+ mutex hold states, and that'd be unsafe to call them directly. */
+void grpc_winsocket_shutdown(grpc_winsocket *winsocket) {
+ /* Grab the function pointer for DisconnectEx for that specific socket.
+ It may change depending on the interface. */
+ int status;
+ GUID guid = WSAID_DISCONNECTEX;
+ LPFN_DISCONNECTEX DisconnectEx;
+ DWORD ioctl_num_bytes;
+
+ status = WSAIoctl(winsocket->socket, SIO_GET_EXTENSION_FUNCTION_POINTER,
+ &guid, sizeof(guid), &DisconnectEx, sizeof(DisconnectEx),
+ &ioctl_num_bytes, NULL, NULL);
+
+ if (status == 0) {
+ DisconnectEx(winsocket->socket, NULL, 0, 0);
+ } else {
+ char *utf8_message = gpr_format_message(WSAGetLastError());
+ gpr_log(GPR_ERROR, "Unable to retrieve DisconnectEx pointer : %s",
+ utf8_message);
+ gpr_free(utf8_message);
+ }
+ closesocket(winsocket->socket);
+}
+
+void grpc_winsocket_destroy(grpc_winsocket *winsocket) {
+ grpc_iomgr_unregister_object(&winsocket->iomgr_object);
+ gpr_mu_destroy(&winsocket->state_mu);
+ gpr_free(winsocket);
+}
+
+#endif /* GPR_WINSOCK_SOCKET */
diff --git a/src/core/lib/iomgr/socket_windows.h b/src/core/lib/iomgr/socket_windows.h
new file mode 100644
index 0000000000..74447896c9
--- /dev/null
+++ b/src/core/lib/iomgr/socket_windows.h
@@ -0,0 +1,111 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_SOCKET_WINDOWS_H
+#define GRPC_CORE_LIB_IOMGR_SOCKET_WINDOWS_H
+
+#include <grpc/support/port_platform.h>
+#include <winsock2.h>
+
+#include <grpc/support/atm.h>
+#include <grpc/support/sync.h>
+
+#include "src/core/lib/iomgr/exec_ctx.h"
+#include "src/core/lib/iomgr/iomgr_internal.h"
+
+/* This holds the data for an outstanding read or write on a socket.
+ The mutex to protect the concurrent access to that data is the one
+ inside the winsocket wrapper. */
+typedef struct grpc_winsocket_callback_info {
+ /* This is supposed to be a WSAOVERLAPPED, but in order to get that
+ definition, we need to include ws2tcpip.h, which needs to be included
+ from the top, otherwise it'll clash with a previous inclusion of
+ windows.h that in turns includes winsock.h. If anyone knows a way
+ to do it properly, feel free to send a patch. */
+ OVERLAPPED overlapped;
+ /* The callback information for the pending operation. May be empty if the
+ caller hasn't registered a callback yet. */
+ grpc_closure *closure;
+ /* A boolean to describe if the IO Completion Port got a notification for
+ that operation. This will happen if the operation completed before the
+ called had time to register a callback. We could avoid that behavior
+ altogether by forcing the caller to always register its callback before
+ proceeding queue an operation, but it is frequent for an IO Completion
+ Port to trigger quickly. This way we avoid a context switch for calling
+ the callback. We also simplify the read / write operations to avoid having
+ to hold a mutex for a long amount of time. */
+ int has_pending_iocp;
+ /* The results of the overlapped operation. */
+ DWORD bytes_transfered;
+ int wsa_error;
+} grpc_winsocket_callback_info;
+
+/* This is a wrapper to a Windows socket. A socket can have one outstanding
+ read, and one outstanding write. Doing an asynchronous accept means waiting
+ for a read operation. Doing an asynchronous connect means waiting for a
+ write operation. These are completely arbitrary ties between the operation
+ and the kind of event, because we can have one overlapped per pending
+ operation, whichever its nature is. So we could have more dedicated pending
+ operation callbacks for connect and listen. But given the scope of listen
+ and accept, we don't need to go to that extent and waste memory. Also, this
+ is closer to what happens in posix world. */
+typedef struct grpc_winsocket {
+ SOCKET socket;
+
+ grpc_winsocket_callback_info write_info;
+ grpc_winsocket_callback_info read_info;
+
+ gpr_mu state_mu;
+
+ /* You can't add the same socket twice to the same IO Completion Port.
+ This prevents that. */
+ int added_to_iocp;
+
+ grpc_closure shutdown_closure;
+
+ /* A label for iomgr to track outstanding objects */
+ grpc_iomgr_object iomgr_object;
+} grpc_winsocket;
+
+/* Create a wrapped windows handle. This takes ownership of it, meaning that
+ it will be responsible for closing it. */
+grpc_winsocket *grpc_winsocket_create(SOCKET socket, const char *name);
+
+/* Initiate an asynchronous shutdown of the socket. Will call off any pending
+ operation to cancel them. */
+void grpc_winsocket_shutdown(grpc_winsocket *socket);
+
+/* Destroy a socket. Should only be called if there's no pending operation. */
+void grpc_winsocket_destroy(grpc_winsocket *socket);
+
+#endif /* GRPC_CORE_LIB_IOMGR_SOCKET_WINDOWS_H */
diff --git a/src/core/lib/iomgr/tcp_client.h b/src/core/lib/iomgr/tcp_client.h
new file mode 100644
index 0000000000..6bbe26445a
--- /dev/null
+++ b/src/core/lib/iomgr/tcp_client.h
@@ -0,0 +1,53 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_TCP_CLIENT_H
+#define GRPC_CORE_LIB_IOMGR_TCP_CLIENT_H
+
+#include <grpc/support/time.h>
+#include "src/core/lib/iomgr/endpoint.h"
+#include "src/core/lib/iomgr/pollset_set.h"
+#include "src/core/lib/iomgr/sockaddr.h"
+
+/* Asynchronously connect to an address (specified as (addr, len)), and call
+ cb with arg and the completed connection when done (or call cb with arg and
+ NULL on failure).
+ interested_parties points to a set of pollsets that would be interested
+ in this connection being established (in order to continue their work) */
+void grpc_tcp_client_connect(grpc_exec_ctx *exec_ctx, grpc_closure *on_connect,
+ grpc_endpoint **endpoint,
+ grpc_pollset_set *interested_parties,
+ const struct sockaddr *addr, size_t addr_len,
+ gpr_timespec deadline);
+
+#endif /* GRPC_CORE_LIB_IOMGR_TCP_CLIENT_H */
diff --git a/src/core/lib/iomgr/tcp_client_posix.c b/src/core/lib/iomgr/tcp_client_posix.c
new file mode 100644
index 0000000000..b8ef643298
--- /dev/null
+++ b/src/core/lib/iomgr/tcp_client_posix.c
@@ -0,0 +1,306 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_POSIX_SOCKET
+
+#include "src/core/lib/iomgr/tcp_client.h"
+
+#include <errno.h>
+#include <netinet/in.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/time.h>
+
+#include "src/core/lib/iomgr/iomgr_posix.h"
+#include "src/core/lib/iomgr/pollset_posix.h"
+#include "src/core/lib/iomgr/pollset_set_posix.h"
+#include "src/core/lib/iomgr/sockaddr_utils.h"
+#include "src/core/lib/iomgr/socket_utils_posix.h"
+#include "src/core/lib/iomgr/tcp_posix.h"
+#include "src/core/lib/iomgr/timer.h"
+#include "src/core/lib/iomgr/unix_sockets_posix.h"
+#include "src/core/lib/support/string.h"
+
+extern int grpc_tcp_trace;
+
+typedef struct {
+ gpr_mu mu;
+ grpc_fd *fd;
+ gpr_timespec deadline;
+ grpc_timer alarm;
+ int refs;
+ grpc_closure write_closure;
+ grpc_pollset_set *interested_parties;
+ char *addr_str;
+ grpc_endpoint **ep;
+ grpc_closure *closure;
+} async_connect;
+
+static int prepare_socket(const struct sockaddr *addr, int fd) {
+ if (fd < 0) {
+ goto error;
+ }
+
+ if (!grpc_set_socket_nonblocking(fd, 1) || !grpc_set_socket_cloexec(fd, 1) ||
+ (!grpc_is_unix_socket(addr) && !grpc_set_socket_low_latency(fd, 1)) ||
+ !grpc_set_socket_no_sigpipe_if_possible(fd)) {
+ gpr_log(GPR_ERROR, "Unable to configure socket %d: %s", fd,
+ strerror(errno));
+ goto error;
+ }
+ return 1;
+
+error:
+ if (fd >= 0) {
+ close(fd);
+ }
+ return 0;
+}
+
+static void tc_on_alarm(grpc_exec_ctx *exec_ctx, void *acp, bool success) {
+ int done;
+ async_connect *ac = acp;
+ if (grpc_tcp_trace) {
+ gpr_log(GPR_DEBUG, "CLIENT_CONNECT: %s: on_alarm: success=%d", ac->addr_str,
+ success);
+ }
+ gpr_mu_lock(&ac->mu);
+ if (ac->fd != NULL) {
+ grpc_fd_shutdown(exec_ctx, ac->fd);
+ }
+ done = (--ac->refs == 0);
+ gpr_mu_unlock(&ac->mu);
+ if (done) {
+ gpr_mu_destroy(&ac->mu);
+ gpr_free(ac->addr_str);
+ gpr_free(ac);
+ }
+}
+
+static void on_writable(grpc_exec_ctx *exec_ctx, void *acp, bool success) {
+ async_connect *ac = acp;
+ int so_error = 0;
+ socklen_t so_error_size;
+ int err;
+ int done;
+ grpc_endpoint **ep = ac->ep;
+ grpc_closure *closure = ac->closure;
+ grpc_fd *fd;
+
+ if (grpc_tcp_trace) {
+ gpr_log(GPR_DEBUG, "CLIENT_CONNECT: %s: on_writable: success=%d",
+ ac->addr_str, success);
+ }
+
+ gpr_mu_lock(&ac->mu);
+ GPR_ASSERT(ac->fd);
+ fd = ac->fd;
+ ac->fd = NULL;
+ gpr_mu_unlock(&ac->mu);
+
+ grpc_timer_cancel(exec_ctx, &ac->alarm);
+
+ gpr_mu_lock(&ac->mu);
+ if (success) {
+ do {
+ so_error_size = sizeof(so_error);
+ err = getsockopt(fd->fd, SOL_SOCKET, SO_ERROR, &so_error, &so_error_size);
+ } while (err < 0 && errno == EINTR);
+ if (err < 0) {
+ gpr_log(GPR_ERROR, "failed to connect to '%s': getsockopt(ERROR): %s",
+ ac->addr_str, strerror(errno));
+ goto finish;
+ } else if (so_error != 0) {
+ if (so_error == ENOBUFS) {
+ /* We will get one of these errors if we have run out of
+ memory in the kernel for the data structures allocated
+ when you connect a socket. If this happens it is very
+ likely that if we wait a little bit then try again the
+ connection will work (since other programs or this
+ program will close their network connections and free up
+ memory). This does _not_ indicate that there is anything
+ wrong with the server we are connecting to, this is a
+ local problem.
+
+ If you are looking at this code, then chances are that
+ your program or another program on the same computer
+ opened too many network connections. The "easy" fix:
+ don't do that! */
+ gpr_log(GPR_ERROR, "kernel out of buffers");
+ gpr_mu_unlock(&ac->mu);
+ grpc_fd_notify_on_write(exec_ctx, fd, &ac->write_closure);
+ return;
+ } else {
+ switch (so_error) {
+ case ECONNREFUSED:
+ gpr_log(
+ GPR_ERROR,
+ "failed to connect to '%s': socket error: connection refused",
+ ac->addr_str);
+ break;
+ default:
+ gpr_log(GPR_ERROR, "failed to connect to '%s': socket error: %d",
+ ac->addr_str, so_error);
+ break;
+ }
+ goto finish;
+ }
+ } else {
+ grpc_pollset_set_del_fd(exec_ctx, ac->interested_parties, fd);
+ *ep = grpc_tcp_create(fd, GRPC_TCP_DEFAULT_READ_SLICE_SIZE, ac->addr_str);
+ fd = NULL;
+ goto finish;
+ }
+ } else {
+ gpr_log(GPR_ERROR, "failed to connect to '%s': timeout occurred",
+ ac->addr_str);
+ goto finish;
+ }
+
+ GPR_UNREACHABLE_CODE(return );
+
+finish:
+ if (fd != NULL) {
+ grpc_pollset_set_del_fd(exec_ctx, ac->interested_parties, fd);
+ grpc_fd_orphan(exec_ctx, fd, NULL, NULL, "tcp_client_orphan");
+ fd = NULL;
+ }
+ done = (--ac->refs == 0);
+ gpr_mu_unlock(&ac->mu);
+ if (done) {
+ gpr_mu_destroy(&ac->mu);
+ gpr_free(ac->addr_str);
+ gpr_free(ac);
+ }
+ grpc_exec_ctx_enqueue(exec_ctx, closure, *ep != NULL, NULL);
+}
+
+void grpc_tcp_client_connect(grpc_exec_ctx *exec_ctx, grpc_closure *closure,
+ grpc_endpoint **ep,
+ grpc_pollset_set *interested_parties,
+ const struct sockaddr *addr, size_t addr_len,
+ gpr_timespec deadline) {
+ int fd;
+ grpc_dualstack_mode dsmode;
+ int err;
+ async_connect *ac;
+ struct sockaddr_in6 addr6_v4mapped;
+ struct sockaddr_in addr4_copy;
+ grpc_fd *fdobj;
+ char *name;
+ char *addr_str;
+
+ *ep = NULL;
+
+ /* Use dualstack sockets where available. */
+ if (grpc_sockaddr_to_v4mapped(addr, &addr6_v4mapped)) {
+ addr = (const struct sockaddr *)&addr6_v4mapped;
+ addr_len = sizeof(addr6_v4mapped);
+ }
+
+ fd = grpc_create_dualstack_socket(addr, SOCK_STREAM, 0, &dsmode);
+ if (fd < 0) {
+ gpr_log(GPR_ERROR, "Unable to create socket: %s", strerror(errno));
+ }
+ if (dsmode == GRPC_DSMODE_IPV4) {
+ /* If we got an AF_INET socket, map the address back to IPv4. */
+ GPR_ASSERT(grpc_sockaddr_is_v4mapped(addr, &addr4_copy));
+ addr = (struct sockaddr *)&addr4_copy;
+ addr_len = sizeof(addr4_copy);
+ }
+ if (!prepare_socket(addr, fd)) {
+ grpc_exec_ctx_enqueue(exec_ctx, closure, false, NULL);
+ return;
+ }
+
+ do {
+ GPR_ASSERT(addr_len < ~(socklen_t)0);
+ err = connect(fd, addr, (socklen_t)addr_len);
+ } while (err < 0 && errno == EINTR);
+
+ addr_str = grpc_sockaddr_to_uri(addr);
+ gpr_asprintf(&name, "tcp-client:%s", addr_str);
+
+ fdobj = grpc_fd_create(fd, name);
+
+ if (err >= 0) {
+ *ep = grpc_tcp_create(fdobj, GRPC_TCP_DEFAULT_READ_SLICE_SIZE, addr_str);
+ grpc_exec_ctx_enqueue(exec_ctx, closure, true, NULL);
+ goto done;
+ }
+
+ if (errno != EWOULDBLOCK && errno != EINPROGRESS) {
+ gpr_log(GPR_ERROR, "connect error to '%s': %s", addr_str, strerror(errno));
+ grpc_fd_orphan(exec_ctx, fdobj, NULL, NULL, "tcp_client_connect_error");
+ grpc_exec_ctx_enqueue(exec_ctx, closure, false, NULL);
+ goto done;
+ }
+
+ grpc_pollset_set_add_fd(exec_ctx, interested_parties, fdobj);
+
+ ac = gpr_malloc(sizeof(async_connect));
+ ac->closure = closure;
+ ac->ep = ep;
+ ac->fd = fdobj;
+ ac->interested_parties = interested_parties;
+ ac->addr_str = addr_str;
+ addr_str = NULL;
+ gpr_mu_init(&ac->mu);
+ ac->refs = 2;
+ ac->write_closure.cb = on_writable;
+ ac->write_closure.cb_arg = ac;
+
+ if (grpc_tcp_trace) {
+ gpr_log(GPR_DEBUG, "CLIENT_CONNECT: %s: asynchronously connecting",
+ ac->addr_str);
+ }
+
+ gpr_mu_lock(&ac->mu);
+ grpc_timer_init(exec_ctx, &ac->alarm,
+ gpr_convert_clock_type(deadline, GPR_CLOCK_MONOTONIC),
+ tc_on_alarm, ac, gpr_now(GPR_CLOCK_MONOTONIC));
+ grpc_fd_notify_on_write(exec_ctx, ac->fd, &ac->write_closure);
+ gpr_mu_unlock(&ac->mu);
+
+done:
+ gpr_free(name);
+ gpr_free(addr_str);
+}
+
+#endif
diff --git a/src/core/lib/iomgr/tcp_client_windows.c b/src/core/lib/iomgr/tcp_client_windows.c
new file mode 100644
index 0000000000..86b8d58975
--- /dev/null
+++ b/src/core/lib/iomgr/tcp_client_windows.c
@@ -0,0 +1,221 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_WINSOCK_SOCKET
+
+#include "src/core/lib/iomgr/sockaddr_win32.h"
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/log_win32.h>
+#include <grpc/support/slice_buffer.h>
+#include <grpc/support/useful.h>
+
+#include "src/core/lib/iomgr/iocp_windows.h"
+#include "src/core/lib/iomgr/sockaddr.h"
+#include "src/core/lib/iomgr/sockaddr_utils.h"
+#include "src/core/lib/iomgr/socket_windows.h"
+#include "src/core/lib/iomgr/tcp_client.h"
+#include "src/core/lib/iomgr/tcp_windows.h"
+#include "src/core/lib/iomgr/timer.h"
+
+typedef struct {
+ grpc_closure *on_done;
+ gpr_mu mu;
+ grpc_winsocket *socket;
+ gpr_timespec deadline;
+ grpc_timer alarm;
+ char *addr_name;
+ int refs;
+ grpc_closure on_connect;
+ grpc_endpoint **endpoint;
+} async_connect;
+
+static void async_connect_unlock_and_cleanup(async_connect *ac) {
+ int done = (--ac->refs == 0);
+ gpr_mu_unlock(&ac->mu);
+ if (done) {
+ if (ac->socket != NULL) grpc_winsocket_destroy(ac->socket);
+ gpr_mu_destroy(&ac->mu);
+ gpr_free(ac->addr_name);
+ gpr_free(ac);
+ }
+}
+
+static void on_alarm(grpc_exec_ctx *exec_ctx, void *acp, bool occured) {
+ async_connect *ac = acp;
+ gpr_mu_lock(&ac->mu);
+ /* If the alarm didn't occur, it got cancelled. */
+ if (ac->socket != NULL && occured) {
+ grpc_winsocket_shutdown(ac->socket);
+ }
+ async_connect_unlock_and_cleanup(ac);
+}
+
+static void on_connect(grpc_exec_ctx *exec_ctx, void *acp, bool from_iocp) {
+ async_connect *ac = acp;
+ SOCKET sock = ac->socket->socket;
+ grpc_endpoint **ep = ac->endpoint;
+ grpc_winsocket_callback_info *info = &ac->socket->write_info;
+ grpc_closure *on_done = ac->on_done;
+
+ grpc_timer_cancel(exec_ctx, &ac->alarm);
+
+ gpr_mu_lock(&ac->mu);
+
+ if (from_iocp) {
+ DWORD transfered_bytes = 0;
+ DWORD flags;
+ BOOL wsa_success = WSAGetOverlappedResult(sock, &info->overlapped,
+ &transfered_bytes, FALSE, &flags);
+ GPR_ASSERT(transfered_bytes == 0);
+ if (!wsa_success) {
+ char *utf8_message = gpr_format_message(WSAGetLastError());
+ gpr_log(GPR_ERROR, "on_connect error: %s", utf8_message);
+ gpr_free(utf8_message);
+ } else {
+ *ep = grpc_tcp_create(ac->socket, ac->addr_name);
+ ac->socket = NULL;
+ }
+ }
+
+ async_connect_unlock_and_cleanup(ac);
+ /* If the connection was aborted, the callback was already called when
+ the deadline was met. */
+ on_done->cb(exec_ctx, on_done->cb_arg, *ep != NULL);
+}
+
+/* Tries to issue one async connection, then schedules both an IOCP
+ notification request for the connection, and one timeout alert. */
+void grpc_tcp_client_connect(grpc_exec_ctx *exec_ctx, grpc_closure *on_done,
+ grpc_endpoint **endpoint,
+ grpc_pollset_set *interested_parties,
+ const struct sockaddr *addr, size_t addr_len,
+ gpr_timespec deadline) {
+ SOCKET sock = INVALID_SOCKET;
+ BOOL success;
+ int status;
+ struct sockaddr_in6 addr6_v4mapped;
+ struct sockaddr_in6 local_address;
+ async_connect *ac;
+ grpc_winsocket *socket = NULL;
+ LPFN_CONNECTEX ConnectEx;
+ GUID guid = WSAID_CONNECTEX;
+ DWORD ioctl_num_bytes;
+ const char *message = NULL;
+ char *utf8_message;
+ grpc_winsocket_callback_info *info;
+
+ *endpoint = NULL;
+
+ /* Use dualstack sockets where available. */
+ if (grpc_sockaddr_to_v4mapped(addr, &addr6_v4mapped)) {
+ addr = (const struct sockaddr *)&addr6_v4mapped;
+ addr_len = sizeof(addr6_v4mapped);
+ }
+
+ sock = WSASocket(AF_INET6, SOCK_STREAM, IPPROTO_TCP, NULL, 0,
+ WSA_FLAG_OVERLAPPED);
+ if (sock == INVALID_SOCKET) {
+ message = "Unable to create socket: %s";
+ goto failure;
+ }
+
+ if (!grpc_tcp_prepare_socket(sock)) {
+ message = "Unable to set socket options: %s";
+ goto failure;
+ }
+
+ /* Grab the function pointer for ConnectEx for that specific socket.
+ It may change depending on the interface. */
+ status =
+ WSAIoctl(sock, SIO_GET_EXTENSION_FUNCTION_POINTER, &guid, sizeof(guid),
+ &ConnectEx, sizeof(ConnectEx), &ioctl_num_bytes, NULL, NULL);
+
+ if (status != 0) {
+ message = "Unable to retrieve ConnectEx pointer: %s";
+ goto failure;
+ }
+
+ grpc_sockaddr_make_wildcard6(0, &local_address);
+
+ status = bind(sock, (struct sockaddr *)&local_address, sizeof(local_address));
+ if (status != 0) {
+ message = "Unable to bind socket: %s";
+ goto failure;
+ }
+
+ socket = grpc_winsocket_create(sock, "client");
+ info = &socket->write_info;
+ success =
+ ConnectEx(sock, addr, (int)addr_len, NULL, 0, NULL, &info->overlapped);
+
+ /* It wouldn't be unusual to get a success immediately. But we'll still get
+ an IOCP notification, so let's ignore it. */
+ if (!success) {
+ int error = WSAGetLastError();
+ if (error != ERROR_IO_PENDING) {
+ message = "ConnectEx failed: %s";
+ goto failure;
+ }
+ }
+
+ ac = gpr_malloc(sizeof(async_connect));
+ ac->on_done = on_done;
+ ac->socket = socket;
+ gpr_mu_init(&ac->mu);
+ ac->refs = 2;
+ ac->addr_name = grpc_sockaddr_to_uri(addr);
+ ac->endpoint = endpoint;
+ grpc_closure_init(&ac->on_connect, on_connect, ac);
+
+ grpc_timer_init(exec_ctx, &ac->alarm, deadline, on_alarm, ac,
+ gpr_now(GPR_CLOCK_MONOTONIC));
+ grpc_socket_notify_on_write(exec_ctx, socket, &ac->on_connect);
+ return;
+
+failure:
+ utf8_message = gpr_format_message(WSAGetLastError());
+ gpr_log(GPR_ERROR, message, utf8_message);
+ gpr_free(utf8_message);
+ if (socket != NULL) {
+ grpc_winsocket_destroy(socket);
+ } else if (sock != INVALID_SOCKET) {
+ closesocket(sock);
+ }
+ grpc_exec_ctx_enqueue(exec_ctx, on_done, false, NULL);
+}
+
+#endif /* GPR_WINSOCK_SOCKET */
diff --git a/src/core/lib/iomgr/tcp_posix.c b/src/core/lib/iomgr/tcp_posix.c
new file mode 100644
index 0000000000..1898d96901
--- /dev/null
+++ b/src/core/lib/iomgr/tcp_posix.c
@@ -0,0 +1,493 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_POSIX_SOCKET
+
+#include "src/core/lib/iomgr/tcp_posix.h"
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/slice.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/time.h>
+
+#include "src/core/lib/debug/trace.h"
+#include "src/core/lib/iomgr/pollset_posix.h"
+#include "src/core/lib/iomgr/pollset_set_posix.h"
+#include "src/core/lib/profiling/timers.h"
+#include "src/core/lib/support/string.h"
+
+#ifdef GPR_HAVE_MSG_NOSIGNAL
+#define SENDMSG_FLAGS MSG_NOSIGNAL
+#else
+#define SENDMSG_FLAGS 0
+#endif
+
+#ifdef GPR_MSG_IOVLEN_TYPE
+typedef GPR_MSG_IOVLEN_TYPE msg_iovlen_type;
+#else
+typedef size_t msg_iovlen_type;
+#endif
+
+int grpc_tcp_trace = 0;
+
+typedef struct {
+ grpc_endpoint base;
+ grpc_fd *em_fd;
+ int fd;
+ int finished_edge;
+ msg_iovlen_type iov_size; /* Number of slices to allocate per read attempt */
+ size_t slice_size;
+ gpr_refcount refcount;
+
+ /* garbage after the last read */
+ gpr_slice_buffer last_read_buffer;
+
+ gpr_slice_buffer *incoming_buffer;
+ gpr_slice_buffer *outgoing_buffer;
+ /** slice within outgoing_buffer to write next */
+ size_t outgoing_slice_idx;
+ /** byte within outgoing_buffer->slices[outgoing_slice_idx] to write next */
+ size_t outgoing_byte_idx;
+
+ grpc_closure *read_cb;
+ grpc_closure *write_cb;
+ grpc_closure *release_fd_cb;
+ int *release_fd;
+
+ grpc_closure read_closure;
+ grpc_closure write_closure;
+
+ char *peer_string;
+} grpc_tcp;
+
+static void tcp_handle_read(grpc_exec_ctx *exec_ctx, void *arg /* grpc_tcp */,
+ bool success);
+static void tcp_handle_write(grpc_exec_ctx *exec_ctx, void *arg /* grpc_tcp */,
+ bool success);
+
+static void tcp_shutdown(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep) {
+ grpc_tcp *tcp = (grpc_tcp *)ep;
+ grpc_fd_shutdown(exec_ctx, tcp->em_fd);
+}
+
+static void tcp_free(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp) {
+ grpc_fd_orphan(exec_ctx, tcp->em_fd, tcp->release_fd_cb, tcp->release_fd,
+ "tcp_unref_orphan");
+ gpr_slice_buffer_destroy(&tcp->last_read_buffer);
+ gpr_free(tcp->peer_string);
+ gpr_free(tcp);
+}
+
+/*#define GRPC_TCP_REFCOUNT_DEBUG*/
+#ifdef GRPC_TCP_REFCOUNT_DEBUG
+#define TCP_UNREF(cl, tcp, reason) \
+ tcp_unref((cl), (tcp), (reason), __FILE__, __LINE__)
+#define TCP_REF(tcp, reason) tcp_ref((tcp), (reason), __FILE__, __LINE__)
+static void tcp_unref(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp,
+ const char *reason, const char *file, int line) {
+ gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "TCP unref %p : %s %d -> %d", tcp,
+ reason, tcp->refcount.count, tcp->refcount.count - 1);
+ if (gpr_unref(&tcp->refcount)) {
+ tcp_free(exec_ctx, tcp);
+ }
+}
+
+static void tcp_ref(grpc_tcp *tcp, const char *reason, const char *file,
+ int line) {
+ gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "TCP ref %p : %s %d -> %d", tcp,
+ reason, tcp->refcount.count, tcp->refcount.count + 1);
+ gpr_ref(&tcp->refcount);
+}
+#else
+#define TCP_UNREF(cl, tcp, reason) tcp_unref((cl), (tcp))
+#define TCP_REF(tcp, reason) tcp_ref((tcp))
+static void tcp_unref(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp) {
+ if (gpr_unref(&tcp->refcount)) {
+ tcp_free(exec_ctx, tcp);
+ }
+}
+
+static void tcp_ref(grpc_tcp *tcp) { gpr_ref(&tcp->refcount); }
+#endif
+
+static void tcp_destroy(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep) {
+ grpc_tcp *tcp = (grpc_tcp *)ep;
+ TCP_UNREF(exec_ctx, tcp, "destroy");
+}
+
+static void call_read_cb(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp, int success) {
+ grpc_closure *cb = tcp->read_cb;
+
+ if (grpc_tcp_trace) {
+ size_t i;
+ gpr_log(GPR_DEBUG, "read: success=%d", success);
+ for (i = 0; i < tcp->incoming_buffer->count; i++) {
+ char *dump = gpr_dump_slice(tcp->incoming_buffer->slices[i],
+ GPR_DUMP_HEX | GPR_DUMP_ASCII);
+ gpr_log(GPR_DEBUG, "READ %p: %s", tcp, dump);
+ gpr_free(dump);
+ }
+ }
+
+ tcp->read_cb = NULL;
+ tcp->incoming_buffer = NULL;
+ cb->cb(exec_ctx, cb->cb_arg, success);
+}
+
+#define MAX_READ_IOVEC 4
+static void tcp_continue_read(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp) {
+ struct msghdr msg;
+ struct iovec iov[MAX_READ_IOVEC];
+ ssize_t read_bytes;
+ size_t i;
+
+ GPR_ASSERT(!tcp->finished_edge);
+ GPR_ASSERT(tcp->iov_size <= MAX_READ_IOVEC);
+ GPR_ASSERT(tcp->incoming_buffer->count <= MAX_READ_IOVEC);
+ GPR_TIMER_BEGIN("tcp_continue_read", 0);
+
+ while (tcp->incoming_buffer->count < (size_t)tcp->iov_size) {
+ gpr_slice_buffer_add_indexed(tcp->incoming_buffer,
+ gpr_slice_malloc(tcp->slice_size));
+ }
+ for (i = 0; i < tcp->incoming_buffer->count; i++) {
+ iov[i].iov_base = GPR_SLICE_START_PTR(tcp->incoming_buffer->slices[i]);
+ iov[i].iov_len = GPR_SLICE_LENGTH(tcp->incoming_buffer->slices[i]);
+ }
+
+ msg.msg_name = NULL;
+ msg.msg_namelen = 0;
+ msg.msg_iov = iov;
+ msg.msg_iovlen = tcp->iov_size;
+ msg.msg_control = NULL;
+ msg.msg_controllen = 0;
+ msg.msg_flags = 0;
+
+ GPR_TIMER_BEGIN("recvmsg", 1);
+ do {
+ read_bytes = recvmsg(tcp->fd, &msg, 0);
+ } while (read_bytes < 0 && errno == EINTR);
+ GPR_TIMER_END("recvmsg", 0);
+
+ if (read_bytes < 0) {
+ /* NB: After calling call_read_cb a parallel call of the read handler may
+ * be running. */
+ if (errno == EAGAIN) {
+ if (tcp->iov_size > 1) {
+ tcp->iov_size /= 2;
+ }
+ /* We've consumed the edge, request a new one */
+ grpc_fd_notify_on_read(exec_ctx, tcp->em_fd, &tcp->read_closure);
+ } else {
+ /* TODO(klempner): Log interesting errors */
+ gpr_slice_buffer_reset_and_unref(tcp->incoming_buffer);
+ call_read_cb(exec_ctx, tcp, 0);
+ TCP_UNREF(exec_ctx, tcp, "read");
+ }
+ } else if (read_bytes == 0) {
+ /* 0 read size ==> end of stream */
+ gpr_slice_buffer_reset_and_unref(tcp->incoming_buffer);
+ call_read_cb(exec_ctx, tcp, 0);
+ TCP_UNREF(exec_ctx, tcp, "read");
+ } else {
+ GPR_ASSERT((size_t)read_bytes <= tcp->incoming_buffer->length);
+ if ((size_t)read_bytes < tcp->incoming_buffer->length) {
+ gpr_slice_buffer_trim_end(
+ tcp->incoming_buffer,
+ tcp->incoming_buffer->length - (size_t)read_bytes,
+ &tcp->last_read_buffer);
+ } else if (tcp->iov_size < MAX_READ_IOVEC) {
+ ++tcp->iov_size;
+ }
+ GPR_ASSERT((size_t)read_bytes == tcp->incoming_buffer->length);
+ call_read_cb(exec_ctx, tcp, 1);
+ TCP_UNREF(exec_ctx, tcp, "read");
+ }
+
+ GPR_TIMER_END("tcp_continue_read", 0);
+}
+
+static void tcp_handle_read(grpc_exec_ctx *exec_ctx, void *arg /* grpc_tcp */,
+ bool success) {
+ grpc_tcp *tcp = (grpc_tcp *)arg;
+ GPR_ASSERT(!tcp->finished_edge);
+
+ if (!success) {
+ gpr_slice_buffer_reset_and_unref(tcp->incoming_buffer);
+ call_read_cb(exec_ctx, tcp, 0);
+ TCP_UNREF(exec_ctx, tcp, "read");
+ } else {
+ tcp_continue_read(exec_ctx, tcp);
+ }
+}
+
+static void tcp_read(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
+ gpr_slice_buffer *incoming_buffer, grpc_closure *cb) {
+ grpc_tcp *tcp = (grpc_tcp *)ep;
+ GPR_ASSERT(tcp->read_cb == NULL);
+ tcp->read_cb = cb;
+ tcp->incoming_buffer = incoming_buffer;
+ gpr_slice_buffer_reset_and_unref(incoming_buffer);
+ gpr_slice_buffer_swap(incoming_buffer, &tcp->last_read_buffer);
+ TCP_REF(tcp, "read");
+ if (tcp->finished_edge) {
+ tcp->finished_edge = 0;
+ grpc_fd_notify_on_read(exec_ctx, tcp->em_fd, &tcp->read_closure);
+ } else {
+ grpc_exec_ctx_enqueue(exec_ctx, &tcp->read_closure, true, NULL);
+ }
+}
+
+typedef enum { FLUSH_DONE, FLUSH_PENDING, FLUSH_ERROR } flush_result;
+
+#define MAX_WRITE_IOVEC 16
+static flush_result tcp_flush(grpc_tcp *tcp) {
+ struct msghdr msg;
+ struct iovec iov[MAX_WRITE_IOVEC];
+ msg_iovlen_type iov_size;
+ ssize_t sent_length;
+ size_t sending_length;
+ size_t trailing;
+ size_t unwind_slice_idx;
+ size_t unwind_byte_idx;
+
+ for (;;) {
+ sending_length = 0;
+ unwind_slice_idx = tcp->outgoing_slice_idx;
+ unwind_byte_idx = tcp->outgoing_byte_idx;
+ for (iov_size = 0; tcp->outgoing_slice_idx != tcp->outgoing_buffer->count &&
+ iov_size != MAX_WRITE_IOVEC;
+ iov_size++) {
+ iov[iov_size].iov_base =
+ GPR_SLICE_START_PTR(
+ tcp->outgoing_buffer->slices[tcp->outgoing_slice_idx]) +
+ tcp->outgoing_byte_idx;
+ iov[iov_size].iov_len =
+ GPR_SLICE_LENGTH(
+ tcp->outgoing_buffer->slices[tcp->outgoing_slice_idx]) -
+ tcp->outgoing_byte_idx;
+ sending_length += iov[iov_size].iov_len;
+ tcp->outgoing_slice_idx++;
+ tcp->outgoing_byte_idx = 0;
+ }
+ GPR_ASSERT(iov_size > 0);
+
+ msg.msg_name = NULL;
+ msg.msg_namelen = 0;
+ msg.msg_iov = iov;
+ msg.msg_iovlen = iov_size;
+ msg.msg_control = NULL;
+ msg.msg_controllen = 0;
+ msg.msg_flags = 0;
+
+ GPR_TIMER_BEGIN("sendmsg", 1);
+ do {
+ /* TODO(klempner): Cork if this is a partial write */
+ sent_length = sendmsg(tcp->fd, &msg, SENDMSG_FLAGS);
+ } while (sent_length < 0 && errno == EINTR);
+ GPR_TIMER_END("sendmsg", 0);
+
+ if (sent_length < 0) {
+ if (errno == EAGAIN) {
+ tcp->outgoing_slice_idx = unwind_slice_idx;
+ tcp->outgoing_byte_idx = unwind_byte_idx;
+ return FLUSH_PENDING;
+ } else {
+ /* TODO(klempner): Log some of these */
+ return FLUSH_ERROR;
+ }
+ }
+
+ GPR_ASSERT(tcp->outgoing_byte_idx == 0);
+ trailing = sending_length - (size_t)sent_length;
+ while (trailing > 0) {
+ size_t slice_length;
+
+ tcp->outgoing_slice_idx--;
+ slice_length = GPR_SLICE_LENGTH(
+ tcp->outgoing_buffer->slices[tcp->outgoing_slice_idx]);
+ if (slice_length > trailing) {
+ tcp->outgoing_byte_idx = slice_length - trailing;
+ break;
+ } else {
+ trailing -= slice_length;
+ }
+ }
+
+ if (tcp->outgoing_slice_idx == tcp->outgoing_buffer->count) {
+ return FLUSH_DONE;
+ }
+ };
+}
+
+static void tcp_handle_write(grpc_exec_ctx *exec_ctx, void *arg /* grpc_tcp */,
+ bool success) {
+ grpc_tcp *tcp = (grpc_tcp *)arg;
+ flush_result status;
+ grpc_closure *cb;
+
+ if (!success) {
+ cb = tcp->write_cb;
+ tcp->write_cb = NULL;
+ cb->cb(exec_ctx, cb->cb_arg, 0);
+ TCP_UNREF(exec_ctx, tcp, "write");
+ return;
+ }
+
+ status = tcp_flush(tcp);
+ if (status == FLUSH_PENDING) {
+ grpc_fd_notify_on_write(exec_ctx, tcp->em_fd, &tcp->write_closure);
+ } else {
+ cb = tcp->write_cb;
+ tcp->write_cb = NULL;
+ GPR_TIMER_BEGIN("tcp_handle_write.cb", 0);
+ cb->cb(exec_ctx, cb->cb_arg, status == FLUSH_DONE);
+ GPR_TIMER_END("tcp_handle_write.cb", 0);
+ TCP_UNREF(exec_ctx, tcp, "write");
+ }
+}
+
+static void tcp_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
+ gpr_slice_buffer *buf, grpc_closure *cb) {
+ grpc_tcp *tcp = (grpc_tcp *)ep;
+ flush_result status;
+
+ if (grpc_tcp_trace) {
+ size_t i;
+
+ for (i = 0; i < buf->count; i++) {
+ char *data =
+ gpr_dump_slice(buf->slices[i], GPR_DUMP_HEX | GPR_DUMP_ASCII);
+ gpr_log(GPR_DEBUG, "WRITE %p: %s", tcp, data);
+ gpr_free(data);
+ }
+ }
+
+ GPR_TIMER_BEGIN("tcp_write", 0);
+ GPR_ASSERT(tcp->write_cb == NULL);
+
+ if (buf->length == 0) {
+ GPR_TIMER_END("tcp_write", 0);
+ grpc_exec_ctx_enqueue(exec_ctx, cb, true, NULL);
+ return;
+ }
+ tcp->outgoing_buffer = buf;
+ tcp->outgoing_slice_idx = 0;
+ tcp->outgoing_byte_idx = 0;
+
+ status = tcp_flush(tcp);
+ if (status == FLUSH_PENDING) {
+ TCP_REF(tcp, "write");
+ tcp->write_cb = cb;
+ grpc_fd_notify_on_write(exec_ctx, tcp->em_fd, &tcp->write_closure);
+ } else {
+ grpc_exec_ctx_enqueue(exec_ctx, cb, status == FLUSH_DONE, NULL);
+ }
+
+ GPR_TIMER_END("tcp_write", 0);
+}
+
+static void tcp_add_to_pollset(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
+ grpc_pollset *pollset) {
+ grpc_tcp *tcp = (grpc_tcp *)ep;
+ grpc_pollset_add_fd(exec_ctx, pollset, tcp->em_fd);
+}
+
+static void tcp_add_to_pollset_set(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
+ grpc_pollset_set *pollset_set) {
+ grpc_tcp *tcp = (grpc_tcp *)ep;
+ grpc_pollset_set_add_fd(exec_ctx, pollset_set, tcp->em_fd);
+}
+
+static char *tcp_get_peer(grpc_endpoint *ep) {
+ grpc_tcp *tcp = (grpc_tcp *)ep;
+ return gpr_strdup(tcp->peer_string);
+}
+
+static const grpc_endpoint_vtable vtable = {
+ tcp_read, tcp_write, tcp_add_to_pollset, tcp_add_to_pollset_set,
+ tcp_shutdown, tcp_destroy, tcp_get_peer};
+
+grpc_endpoint *grpc_tcp_create(grpc_fd *em_fd, size_t slice_size,
+ const char *peer_string) {
+ grpc_tcp *tcp = (grpc_tcp *)gpr_malloc(sizeof(grpc_tcp));
+ tcp->base.vtable = &vtable;
+ tcp->peer_string = gpr_strdup(peer_string);
+ tcp->fd = em_fd->fd;
+ tcp->read_cb = NULL;
+ tcp->write_cb = NULL;
+ tcp->release_fd_cb = NULL;
+ tcp->release_fd = NULL;
+ tcp->incoming_buffer = NULL;
+ tcp->slice_size = slice_size;
+ tcp->iov_size = 1;
+ tcp->finished_edge = 1;
+ /* paired with unref in grpc_tcp_destroy */
+ gpr_ref_init(&tcp->refcount, 1);
+ tcp->em_fd = em_fd;
+ tcp->read_closure.cb = tcp_handle_read;
+ tcp->read_closure.cb_arg = tcp;
+ tcp->write_closure.cb = tcp_handle_write;
+ tcp->write_closure.cb_arg = tcp;
+ gpr_slice_buffer_init(&tcp->last_read_buffer);
+
+ return &tcp->base;
+}
+
+int grpc_tcp_fd(grpc_endpoint *ep) {
+ grpc_tcp *tcp = (grpc_tcp *)ep;
+ GPR_ASSERT(ep->vtable == &vtable);
+ return grpc_fd_wrapped_fd(tcp->em_fd);
+}
+
+void grpc_tcp_destroy_and_release_fd(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
+ int *fd, grpc_closure *done) {
+ grpc_tcp *tcp = (grpc_tcp *)ep;
+ GPR_ASSERT(ep->vtable == &vtable);
+ tcp->release_fd = fd;
+ tcp->release_fd_cb = done;
+ TCP_UNREF(exec_ctx, tcp, "destroy");
+}
+
+#endif
diff --git a/src/core/lib/iomgr/tcp_posix.h b/src/core/lib/iomgr/tcp_posix.h
new file mode 100644
index 0000000000..09c4436f1f
--- /dev/null
+++ b/src/core/lib/iomgr/tcp_posix.h
@@ -0,0 +1,71 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_TCP_POSIX_H
+#define GRPC_CORE_LIB_IOMGR_TCP_POSIX_H
+/*
+ Low level TCP "bottom half" implementation, for use by transports built on
+ top of a TCP connection.
+
+ Note that this file does not (yet) include APIs for creating the socket in
+ the first place.
+
+ All calls passing slice transfer ownership of a slice refcount unless
+ otherwise specified.
+*/
+
+#include "src/core/lib/iomgr/endpoint.h"
+#include "src/core/lib/iomgr/fd_posix.h"
+
+#define GRPC_TCP_DEFAULT_READ_SLICE_SIZE 8192
+
+extern int grpc_tcp_trace;
+
+/* Create a tcp endpoint given a file desciptor and a read slice size.
+ Takes ownership of fd. */
+grpc_endpoint *grpc_tcp_create(grpc_fd *fd, size_t read_slice_size,
+ const char *peer_string);
+
+/* Return the tcp endpoint's fd, or -1 if this is not available. Does not
+ release the fd.
+ Requires: ep must be a tcp endpoint.
+ */
+int grpc_tcp_fd(grpc_endpoint *ep);
+
+/* Destroy the tcp endpoint without closing its fd. *fd will be set and done
+ * will be called when the endpoint is destroyed.
+ * Requires: ep must be a tcp endpoint and fd must not be NULL. */
+void grpc_tcp_destroy_and_release_fd(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
+ int *fd, grpc_closure *done);
+
+#endif /* GRPC_CORE_LIB_IOMGR_TCP_POSIX_H */
diff --git a/src/core/lib/iomgr/tcp_server.h b/src/core/lib/iomgr/tcp_server.h
new file mode 100644
index 0000000000..81edb61997
--- /dev/null
+++ b/src/core/lib/iomgr/tcp_server.h
@@ -0,0 +1,103 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_TCP_SERVER_H
+#define GRPC_CORE_LIB_IOMGR_TCP_SERVER_H
+
+#include "src/core/lib/iomgr/closure.h"
+#include "src/core/lib/iomgr/endpoint.h"
+
+/* Forward decl of grpc_tcp_server */
+typedef struct grpc_tcp_server grpc_tcp_server;
+
+typedef struct grpc_tcp_server_acceptor {
+ /* grpc_tcp_server_cb functions share a ref on from_server that is valid
+ until the function returns. */
+ grpc_tcp_server *from_server;
+ /* Indices that may be passed to grpc_tcp_server_port_fd(). */
+ unsigned port_index;
+ unsigned fd_index;
+} grpc_tcp_server_acceptor;
+
+/* Called for newly connected TCP connections. */
+typedef void (*grpc_tcp_server_cb)(grpc_exec_ctx *exec_ctx, void *arg,
+ grpc_endpoint *ep,
+ grpc_tcp_server_acceptor *acceptor);
+
+/* Create a server, initially not bound to any ports. The caller owns one ref.
+ If shutdown_complete is not NULL, it will be used by
+ grpc_tcp_server_unref() when the ref count reaches zero. */
+grpc_tcp_server *grpc_tcp_server_create(grpc_closure *shutdown_complete);
+
+/* Start listening to bound ports */
+void grpc_tcp_server_start(grpc_exec_ctx *exec_ctx, grpc_tcp_server *server,
+ grpc_pollset **pollsets, size_t pollset_count,
+ grpc_tcp_server_cb on_accept_cb, void *cb_arg);
+
+/* Add a port to the server, returning the newly allocated port on success, or
+ -1 on failure.
+
+ The :: and 0.0.0.0 wildcard addresses are treated identically, accepting
+ both IPv4 and IPv6 connections, but :: is the preferred style. This usually
+ creates one socket, but possibly two on systems which support IPv6,
+ but not dualstack sockets. */
+/* TODO(ctiller): deprecate this, and make grpc_tcp_server_add_ports to handle
+ all of the multiple socket port matching logic in one place */
+int grpc_tcp_server_add_port(grpc_tcp_server *s, const void *addr,
+ size_t addr_len);
+
+/* Number of fds at the given port_index, or 0 if port_index is out of
+ bounds. */
+unsigned grpc_tcp_server_port_fd_count(grpc_tcp_server *s, unsigned port_index);
+
+/* Returns the file descriptor of the Mth (fd_index) listening socket of the Nth
+ (port_index) call to add_port() on this server, or -1 if the indices are out
+ of bounds. The file descriptor remains owned by the server, and will be
+ cleaned up when the ref count reaches zero. */
+int grpc_tcp_server_port_fd(grpc_tcp_server *s, unsigned port_index,
+ unsigned fd_index);
+
+/* Ref s and return s. */
+grpc_tcp_server *grpc_tcp_server_ref(grpc_tcp_server *s);
+
+/* shutdown_starting is called when ref count has reached zero and the server is
+ about to be destroyed. The server will be deleted after it returns. Calling
+ grpc_tcp_server_ref() from it has no effect. */
+void grpc_tcp_server_shutdown_starting_add(grpc_tcp_server *s,
+ grpc_closure *shutdown_starting);
+
+/* If the refcount drops to zero, delete s, and call (exec_ctx==NULL) or enqueue
+ a call (exec_ctx!=NULL) to shutdown_complete. */
+void grpc_tcp_server_unref(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s);
+
+#endif /* GRPC_CORE_LIB_IOMGR_TCP_SERVER_H */
diff --git a/src/core/lib/iomgr/tcp_server_posix.c b/src/core/lib/iomgr/tcp_server_posix.c
new file mode 100644
index 0000000000..ef1bf9aa94
--- /dev/null
+++ b/src/core/lib/iomgr/tcp_server_posix.c
@@ -0,0 +1,607 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/* FIXME: "posix" files shouldn't be depending on _GNU_SOURCE */
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_POSIX_SOCKET
+
+#include "src/core/lib/iomgr/tcp_server.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/time.h>
+#include "src/core/lib/iomgr/pollset_posix.h"
+#include "src/core/lib/iomgr/resolve_address.h"
+#include "src/core/lib/iomgr/sockaddr_utils.h"
+#include "src/core/lib/iomgr/socket_utils_posix.h"
+#include "src/core/lib/iomgr/tcp_posix.h"
+#include "src/core/lib/iomgr/unix_sockets_posix.h"
+#include "src/core/lib/support/string.h"
+
+#define MIN_SAFE_ACCEPT_QUEUE_SIZE 100
+
+static gpr_once s_init_max_accept_queue_size;
+static int s_max_accept_queue_size;
+
+/* one listening port */
+typedef struct grpc_tcp_listener grpc_tcp_listener;
+struct grpc_tcp_listener {
+ int fd;
+ grpc_fd *emfd;
+ grpc_tcp_server *server;
+ union {
+ uint8_t untyped[GRPC_MAX_SOCKADDR_SIZE];
+ struct sockaddr sockaddr;
+ } addr;
+ size_t addr_len;
+ int port;
+ unsigned port_index;
+ unsigned fd_index;
+ grpc_closure read_closure;
+ grpc_closure destroyed_closure;
+ struct grpc_tcp_listener *next;
+ /* When we add a listener, more than one can be created, mainly because of
+ IPv6. A sibling will still be in the normal list, but will be flagged
+ as such. Any action, such as ref or unref, will affect all of the
+ siblings in the list. */
+ struct grpc_tcp_listener *sibling;
+ int is_sibling;
+};
+
+/* the overall server */
+struct grpc_tcp_server {
+ gpr_refcount refs;
+ /* Called whenever accept() succeeds on a server port. */
+ grpc_tcp_server_cb on_accept_cb;
+ void *on_accept_cb_arg;
+
+ gpr_mu mu;
+
+ /* active port count: how many ports are actually still listening */
+ size_t active_ports;
+ /* destroyed port count: how many ports are completely destroyed */
+ size_t destroyed_ports;
+
+ /* is this server shutting down? (boolean) */
+ int shutdown;
+
+ /* linked list of server ports */
+ grpc_tcp_listener *head;
+ grpc_tcp_listener *tail;
+ unsigned nports;
+
+ /* List of closures passed to shutdown_starting_add(). */
+ grpc_closure_list shutdown_starting;
+
+ /* shutdown callback */
+ grpc_closure *shutdown_complete;
+
+ /* all pollsets interested in new connections */
+ grpc_pollset **pollsets;
+ /* number of pollsets in the pollsets array */
+ size_t pollset_count;
+};
+
+grpc_tcp_server *grpc_tcp_server_create(grpc_closure *shutdown_complete) {
+ grpc_tcp_server *s = gpr_malloc(sizeof(grpc_tcp_server));
+ gpr_ref_init(&s->refs, 1);
+ gpr_mu_init(&s->mu);
+ s->active_ports = 0;
+ s->destroyed_ports = 0;
+ s->shutdown = 0;
+ s->shutdown_starting.head = NULL;
+ s->shutdown_starting.tail = NULL;
+ s->shutdown_complete = shutdown_complete;
+ s->on_accept_cb = NULL;
+ s->on_accept_cb_arg = NULL;
+ s->head = NULL;
+ s->tail = NULL;
+ s->nports = 0;
+ return s;
+}
+
+static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) {
+ if (s->shutdown_complete != NULL) {
+ grpc_exec_ctx_enqueue(exec_ctx, s->shutdown_complete, true, NULL);
+ }
+
+ gpr_mu_destroy(&s->mu);
+
+ while (s->head) {
+ grpc_tcp_listener *sp = s->head;
+ s->head = sp->next;
+ gpr_free(sp);
+ }
+
+ gpr_free(s);
+}
+
+static void destroyed_port(grpc_exec_ctx *exec_ctx, void *server,
+ bool success) {
+ grpc_tcp_server *s = server;
+ gpr_mu_lock(&s->mu);
+ s->destroyed_ports++;
+ if (s->destroyed_ports == s->nports) {
+ gpr_mu_unlock(&s->mu);
+ finish_shutdown(exec_ctx, s);
+ } else {
+ GPR_ASSERT(s->destroyed_ports < s->nports);
+ gpr_mu_unlock(&s->mu);
+ }
+}
+
+/* called when all listening endpoints have been shutdown, so no further
+ events will be received on them - at this point it's safe to destroy
+ things */
+static void deactivated_all_ports(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) {
+ /* delete ALL the things */
+ gpr_mu_lock(&s->mu);
+
+ if (!s->shutdown) {
+ gpr_mu_unlock(&s->mu);
+ return;
+ }
+
+ if (s->head) {
+ grpc_tcp_listener *sp;
+ for (sp = s->head; sp; sp = sp->next) {
+ grpc_unlink_if_unix_domain_socket(&sp->addr.sockaddr);
+ sp->destroyed_closure.cb = destroyed_port;
+ sp->destroyed_closure.cb_arg = s;
+ grpc_fd_orphan(exec_ctx, sp->emfd, &sp->destroyed_closure, NULL,
+ "tcp_listener_shutdown");
+ }
+ gpr_mu_unlock(&s->mu);
+ } else {
+ gpr_mu_unlock(&s->mu);
+ finish_shutdown(exec_ctx, s);
+ }
+}
+
+static void tcp_server_destroy(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) {
+ gpr_mu_lock(&s->mu);
+
+ GPR_ASSERT(!s->shutdown);
+ s->shutdown = 1;
+
+ /* shutdown all fd's */
+ if (s->active_ports) {
+ grpc_tcp_listener *sp;
+ for (sp = s->head; sp; sp = sp->next) {
+ grpc_fd_shutdown(exec_ctx, sp->emfd);
+ }
+ gpr_mu_unlock(&s->mu);
+ } else {
+ gpr_mu_unlock(&s->mu);
+ deactivated_all_ports(exec_ctx, s);
+ }
+}
+
+/* get max listen queue size on linux */
+static void init_max_accept_queue_size(void) {
+ int n = SOMAXCONN;
+ char buf[64];
+ FILE *fp = fopen("/proc/sys/net/core/somaxconn", "r");
+ if (fp == NULL) {
+ /* 2.4 kernel. */
+ s_max_accept_queue_size = SOMAXCONN;
+ return;
+ }
+ if (fgets(buf, sizeof buf, fp)) {
+ char *end;
+ long i = strtol(buf, &end, 10);
+ if (i > 0 && i <= INT_MAX && end && *end == 0) {
+ n = (int)i;
+ }
+ }
+ fclose(fp);
+ s_max_accept_queue_size = n;
+
+ if (s_max_accept_queue_size < MIN_SAFE_ACCEPT_QUEUE_SIZE) {
+ gpr_log(GPR_INFO,
+ "Suspiciously small accept queue (%d) will probably lead to "
+ "connection drops",
+ s_max_accept_queue_size);
+ }
+}
+
+static int get_max_accept_queue_size(void) {
+ gpr_once_init(&s_init_max_accept_queue_size, init_max_accept_queue_size);
+ return s_max_accept_queue_size;
+}
+
+/* Prepare a recently-created socket for listening. */
+static int prepare_socket(int fd, const struct sockaddr *addr,
+ size_t addr_len) {
+ struct sockaddr_storage sockname_temp;
+ socklen_t sockname_len;
+
+ if (fd < 0) {
+ goto error;
+ }
+
+ if (!grpc_set_socket_nonblocking(fd, 1) || !grpc_set_socket_cloexec(fd, 1) ||
+ (!grpc_is_unix_socket(addr) && (!grpc_set_socket_low_latency(fd, 1) ||
+ !grpc_set_socket_reuse_addr(fd, 1))) ||
+ !grpc_set_socket_no_sigpipe_if_possible(fd)) {
+ gpr_log(GPR_ERROR, "Unable to configure socket %d: %s", fd,
+ strerror(errno));
+ goto error;
+ }
+
+ GPR_ASSERT(addr_len < ~(socklen_t)0);
+ if (bind(fd, addr, (socklen_t)addr_len) < 0) {
+ char *addr_str;
+ grpc_sockaddr_to_string(&addr_str, addr, 0);
+ gpr_log(GPR_ERROR, "bind addr=%s: %s", addr_str, strerror(errno));
+ gpr_free(addr_str);
+ goto error;
+ }
+
+ if (listen(fd, get_max_accept_queue_size()) < 0) {
+ gpr_log(GPR_ERROR, "listen: %s", strerror(errno));
+ goto error;
+ }
+
+ sockname_len = sizeof(sockname_temp);
+ if (getsockname(fd, (struct sockaddr *)&sockname_temp, &sockname_len) < 0) {
+ goto error;
+ }
+
+ return grpc_sockaddr_get_port((struct sockaddr *)&sockname_temp);
+
+error:
+ if (fd >= 0) {
+ close(fd);
+ }
+ return -1;
+}
+
+/* event manager callback when reads are ready */
+static void on_read(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
+ grpc_tcp_listener *sp = arg;
+ grpc_tcp_server_acceptor acceptor = {sp->server, sp->port_index,
+ sp->fd_index};
+ grpc_fd *fdobj;
+ size_t i;
+
+ if (!success) {
+ goto error;
+ }
+
+ /* loop until accept4 returns EAGAIN, and then re-arm notification */
+ for (;;) {
+ struct sockaddr_storage addr;
+ socklen_t addrlen = sizeof(addr);
+ char *addr_str;
+ char *name;
+ /* Note: If we ever decide to return this address to the user, remember to
+ strip off the ::ffff:0.0.0.0/96 prefix first. */
+ int fd = grpc_accept4(sp->fd, (struct sockaddr *)&addr, &addrlen, 1, 1);
+ if (fd < 0) {
+ switch (errno) {
+ case EINTR:
+ continue;
+ case EAGAIN:
+ grpc_fd_notify_on_read(exec_ctx, sp->emfd, &sp->read_closure);
+ return;
+ default:
+ gpr_log(GPR_ERROR, "Failed accept4: %s", strerror(errno));
+ goto error;
+ }
+ }
+
+ grpc_set_socket_no_sigpipe_if_possible(fd);
+
+ addr_str = grpc_sockaddr_to_uri((struct sockaddr *)&addr);
+ gpr_asprintf(&name, "tcp-server-connection:%s", addr_str);
+
+ if (grpc_tcp_trace) {
+ gpr_log(GPR_DEBUG, "SERVER_CONNECT: incoming connection: %s", addr_str);
+ }
+
+ fdobj = grpc_fd_create(fd, name);
+ /* TODO(ctiller): revise this when we have server-side sharding
+ of channels -- we certainly should not be automatically adding every
+ incoming channel to every pollset owned by the server */
+ for (i = 0; i < sp->server->pollset_count; i++) {
+ grpc_pollset_add_fd(exec_ctx, sp->server->pollsets[i], fdobj);
+ }
+ sp->server->on_accept_cb(
+ exec_ctx, sp->server->on_accept_cb_arg,
+ grpc_tcp_create(fdobj, GRPC_TCP_DEFAULT_READ_SLICE_SIZE, addr_str),
+ &acceptor);
+
+ gpr_free(name);
+ gpr_free(addr_str);
+ }
+
+ GPR_UNREACHABLE_CODE(return );
+
+error:
+ gpr_mu_lock(&sp->server->mu);
+ if (0 == --sp->server->active_ports) {
+ gpr_mu_unlock(&sp->server->mu);
+ deactivated_all_ports(exec_ctx, sp->server);
+ } else {
+ gpr_mu_unlock(&sp->server->mu);
+ }
+}
+
+static grpc_tcp_listener *add_socket_to_server(grpc_tcp_server *s, int fd,
+ const struct sockaddr *addr,
+ size_t addr_len,
+ unsigned port_index,
+ unsigned fd_index) {
+ grpc_tcp_listener *sp = NULL;
+ int port;
+ char *addr_str;
+ char *name;
+
+ port = prepare_socket(fd, addr, addr_len);
+ if (port >= 0) {
+ grpc_sockaddr_to_string(&addr_str, (struct sockaddr *)&addr, 1);
+ gpr_asprintf(&name, "tcp-server-listener:%s", addr_str);
+ gpr_mu_lock(&s->mu);
+ s->nports++;
+ GPR_ASSERT(!s->on_accept_cb && "must add ports before starting server");
+ sp = gpr_malloc(sizeof(grpc_tcp_listener));
+ sp->next = NULL;
+ if (s->head == NULL) {
+ s->head = sp;
+ } else {
+ s->tail->next = sp;
+ }
+ s->tail = sp;
+ sp->server = s;
+ sp->fd = fd;
+ sp->emfd = grpc_fd_create(fd, name);
+ memcpy(sp->addr.untyped, addr, addr_len);
+ sp->addr_len = addr_len;
+ sp->port = port;
+ sp->port_index = port_index;
+ sp->fd_index = fd_index;
+ sp->is_sibling = 0;
+ sp->sibling = NULL;
+ GPR_ASSERT(sp->emfd);
+ gpr_mu_unlock(&s->mu);
+ gpr_free(addr_str);
+ gpr_free(name);
+ }
+
+ return sp;
+}
+
+int grpc_tcp_server_add_port(grpc_tcp_server *s, const void *addr,
+ size_t addr_len) {
+ grpc_tcp_listener *sp;
+ grpc_tcp_listener *sp2 = NULL;
+ int fd;
+ grpc_dualstack_mode dsmode;
+ struct sockaddr_in6 addr6_v4mapped;
+ struct sockaddr_in wild4;
+ struct sockaddr_in6 wild6;
+ struct sockaddr_in addr4_copy;
+ struct sockaddr *allocated_addr = NULL;
+ struct sockaddr_storage sockname_temp;
+ socklen_t sockname_len;
+ int port;
+ unsigned port_index = 0;
+ unsigned fd_index = 0;
+ if (s->tail != NULL) {
+ port_index = s->tail->port_index + 1;
+ }
+ grpc_unlink_if_unix_domain_socket((struct sockaddr *)addr);
+
+ /* Check if this is a wildcard port, and if so, try to keep the port the same
+ as some previously created listener. */
+ if (grpc_sockaddr_get_port(addr) == 0) {
+ for (sp = s->head; sp; sp = sp->next) {
+ sockname_len = sizeof(sockname_temp);
+ if (0 == getsockname(sp->fd, (struct sockaddr *)&sockname_temp,
+ &sockname_len)) {
+ port = grpc_sockaddr_get_port((struct sockaddr *)&sockname_temp);
+ if (port > 0) {
+ allocated_addr = malloc(addr_len);
+ memcpy(allocated_addr, addr, addr_len);
+ grpc_sockaddr_set_port(allocated_addr, port);
+ addr = allocated_addr;
+ break;
+ }
+ }
+ }
+ }
+
+ sp = NULL;
+
+ if (grpc_sockaddr_to_v4mapped(addr, &addr6_v4mapped)) {
+ addr = (const struct sockaddr *)&addr6_v4mapped;
+ addr_len = sizeof(addr6_v4mapped);
+ }
+
+ /* Treat :: or 0.0.0.0 as a family-agnostic wildcard. */
+ if (grpc_sockaddr_is_wildcard(addr, &port)) {
+ grpc_sockaddr_make_wildcards(port, &wild4, &wild6);
+
+ /* Try listening on IPv6 first. */
+ addr = (struct sockaddr *)&wild6;
+ addr_len = sizeof(wild6);
+ fd = grpc_create_dualstack_socket(addr, SOCK_STREAM, 0, &dsmode);
+ sp = add_socket_to_server(s, fd, addr, addr_len, port_index, fd_index);
+ if (fd >= 0 && dsmode == GRPC_DSMODE_DUALSTACK) {
+ goto done;
+ }
+ if (sp != NULL) {
+ ++fd_index;
+ }
+ /* If we didn't get a dualstack socket, also listen on 0.0.0.0. */
+ if (port == 0 && sp != NULL) {
+ grpc_sockaddr_set_port((struct sockaddr *)&wild4, sp->port);
+ }
+ addr = (struct sockaddr *)&wild4;
+ addr_len = sizeof(wild4);
+ }
+
+ fd = grpc_create_dualstack_socket(addr, SOCK_STREAM, 0, &dsmode);
+ if (fd < 0) {
+ gpr_log(GPR_ERROR, "Unable to create socket: %s", strerror(errno));
+ } else {
+ if (dsmode == GRPC_DSMODE_IPV4 &&
+ grpc_sockaddr_is_v4mapped(addr, &addr4_copy)) {
+ addr = (struct sockaddr *)&addr4_copy;
+ addr_len = sizeof(addr4_copy);
+ }
+ sp2 = sp;
+ sp = add_socket_to_server(s, fd, addr, addr_len, port_index, fd_index);
+ if (sp2 != NULL && sp != NULL) {
+ sp2->sibling = sp;
+ sp->is_sibling = 1;
+ }
+ }
+
+done:
+ gpr_free(allocated_addr);
+ if (sp != NULL) {
+ return sp->port;
+ } else {
+ return -1;
+ }
+}
+
+unsigned grpc_tcp_server_port_fd_count(grpc_tcp_server *s,
+ unsigned port_index) {
+ unsigned num_fds = 0;
+ grpc_tcp_listener *sp;
+ for (sp = s->head; sp && port_index != 0; sp = sp->next) {
+ if (!sp->is_sibling) {
+ --port_index;
+ }
+ }
+ for (; sp; sp = sp->sibling, ++num_fds)
+ ;
+ return num_fds;
+}
+
+int grpc_tcp_server_port_fd(grpc_tcp_server *s, unsigned port_index,
+ unsigned fd_index) {
+ grpc_tcp_listener *sp;
+ for (sp = s->head; sp && port_index != 0; sp = sp->next) {
+ if (!sp->is_sibling) {
+ --port_index;
+ }
+ }
+ for (; sp && fd_index != 0; sp = sp->sibling, --fd_index)
+ ;
+ if (sp) {
+ return sp->fd;
+ } else {
+ return -1;
+ }
+}
+
+void grpc_tcp_server_start(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s,
+ grpc_pollset **pollsets, size_t pollset_count,
+ grpc_tcp_server_cb on_accept_cb,
+ void *on_accept_cb_arg) {
+ size_t i;
+ grpc_tcp_listener *sp;
+ GPR_ASSERT(on_accept_cb);
+ gpr_mu_lock(&s->mu);
+ GPR_ASSERT(!s->on_accept_cb);
+ GPR_ASSERT(s->active_ports == 0);
+ s->on_accept_cb = on_accept_cb;
+ s->on_accept_cb_arg = on_accept_cb_arg;
+ s->pollsets = pollsets;
+ s->pollset_count = pollset_count;
+ for (sp = s->head; sp; sp = sp->next) {
+ for (i = 0; i < pollset_count; i++) {
+ grpc_pollset_add_fd(exec_ctx, pollsets[i], sp->emfd);
+ }
+ sp->read_closure.cb = on_read;
+ sp->read_closure.cb_arg = sp;
+ grpc_fd_notify_on_read(exec_ctx, sp->emfd, &sp->read_closure);
+ s->active_ports++;
+ }
+ gpr_mu_unlock(&s->mu);
+}
+
+grpc_tcp_server *grpc_tcp_server_ref(grpc_tcp_server *s) {
+ gpr_ref(&s->refs);
+ return s;
+}
+
+void grpc_tcp_server_shutdown_starting_add(grpc_tcp_server *s,
+ grpc_closure *shutdown_starting) {
+ gpr_mu_lock(&s->mu);
+ grpc_closure_list_add(&s->shutdown_starting, shutdown_starting, 1);
+ gpr_mu_unlock(&s->mu);
+}
+
+void grpc_tcp_server_unref(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) {
+ if (gpr_unref(&s->refs)) {
+ /* Complete shutdown_starting work before destroying. */
+ grpc_exec_ctx local_exec_ctx = GRPC_EXEC_CTX_INIT;
+ gpr_mu_lock(&s->mu);
+ grpc_exec_ctx_enqueue_list(&local_exec_ctx, &s->shutdown_starting, NULL);
+ gpr_mu_unlock(&s->mu);
+ if (exec_ctx == NULL) {
+ grpc_exec_ctx_flush(&local_exec_ctx);
+ tcp_server_destroy(&local_exec_ctx, s);
+ grpc_exec_ctx_finish(&local_exec_ctx);
+ } else {
+ grpc_exec_ctx_finish(&local_exec_ctx);
+ tcp_server_destroy(exec_ctx, s);
+ }
+ }
+}
+
+#endif
diff --git a/src/core/lib/iomgr/tcp_server_windows.c b/src/core/lib/iomgr/tcp_server_windows.c
new file mode 100644
index 0000000000..3d6a29b2e2
--- /dev/null
+++ b/src/core/lib/iomgr/tcp_server_windows.c
@@ -0,0 +1,557 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_WINSOCK_SOCKET
+
+#include <io.h>
+
+#include "src/core/lib/iomgr/sockaddr_utils.h"
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/log_win32.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/time.h>
+
+#include "src/core/lib/iomgr/iocp_windows.h"
+#include "src/core/lib/iomgr/pollset_windows.h"
+#include "src/core/lib/iomgr/socket_windows.h"
+#include "src/core/lib/iomgr/tcp_server.h"
+#include "src/core/lib/iomgr/tcp_windows.h"
+
+#define MIN_SAFE_ACCEPT_QUEUE_SIZE 100
+
+/* one listening port */
+typedef struct grpc_tcp_listener grpc_tcp_listener;
+struct grpc_tcp_listener {
+ /* This seemingly magic number comes from AcceptEx's documentation. each
+ address buffer needs to have at least 16 more bytes at their end. */
+ uint8_t addresses[(sizeof(struct sockaddr_in6) + 16) * 2];
+ /* This will hold the socket for the next accept. */
+ SOCKET new_socket;
+ /* The listener winsocket. */
+ grpc_winsocket *socket;
+ /* The actual TCP port number. */
+ int port;
+ unsigned port_index;
+ grpc_tcp_server *server;
+ /* The cached AcceptEx for that port. */
+ LPFN_ACCEPTEX AcceptEx;
+ int shutting_down;
+ /* closure for socket notification of accept being ready */
+ grpc_closure on_accept;
+ /* linked list */
+ struct grpc_tcp_listener *next;
+};
+
+/* the overall server */
+struct grpc_tcp_server {
+ gpr_refcount refs;
+ /* Called whenever accept() succeeds on a server port. */
+ grpc_tcp_server_cb on_accept_cb;
+ void *on_accept_cb_arg;
+
+ gpr_mu mu;
+
+ /* active port count: how many ports are actually still listening */
+ int active_ports;
+
+ /* linked list of server ports */
+ grpc_tcp_listener *head;
+ grpc_tcp_listener *tail;
+
+ /* List of closures passed to shutdown_starting_add(). */
+ grpc_closure_list shutdown_starting;
+
+ /* shutdown callback */
+ grpc_closure *shutdown_complete;
+};
+
+/* Public function. Allocates the proper data structures to hold a
+ grpc_tcp_server. */
+grpc_tcp_server *grpc_tcp_server_create(grpc_closure *shutdown_complete) {
+ grpc_tcp_server *s = gpr_malloc(sizeof(grpc_tcp_server));
+ gpr_ref_init(&s->refs, 1);
+ gpr_mu_init(&s->mu);
+ s->active_ports = 0;
+ s->on_accept_cb = NULL;
+ s->on_accept_cb_arg = NULL;
+ s->head = NULL;
+ s->tail = NULL;
+ s->shutdown_starting.head = NULL;
+ s->shutdown_starting.tail = NULL;
+ s->shutdown_complete = shutdown_complete;
+ return s;
+}
+
+static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) {
+ if (s->shutdown_complete != NULL) {
+ grpc_exec_ctx_enqueue(exec_ctx, s->shutdown_complete, true, NULL);
+ }
+
+ /* Now that the accepts have been aborted, we can destroy the sockets.
+ The IOCP won't get notified on these, so we can flag them as already
+ closed by the system. */
+ while (s->head) {
+ grpc_tcp_listener *sp = s->head;
+ s->head = sp->next;
+ sp->next = NULL;
+ grpc_winsocket_destroy(sp->socket);
+ gpr_free(sp);
+ }
+ gpr_free(s);
+}
+
+grpc_tcp_server *grpc_tcp_server_ref(grpc_tcp_server *s) {
+ gpr_ref(&s->refs);
+ return s;
+}
+
+void grpc_tcp_server_shutdown_starting_add(grpc_tcp_server *s,
+ grpc_closure *shutdown_starting) {
+ gpr_mu_lock(&s->mu);
+ grpc_closure_list_add(&s->shutdown_starting, shutdown_starting, 1);
+ gpr_mu_unlock(&s->mu);
+}
+
+static void tcp_server_destroy(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) {
+ int immediately_done = 0;
+ grpc_tcp_listener *sp;
+ gpr_mu_lock(&s->mu);
+
+ /* First, shutdown all fd's. This will queue abortion calls for all
+ of the pending accepts due to the normal operation mechanism. */
+ if (s->active_ports == 0) {
+ immediately_done = 1;
+ }
+ for (sp = s->head; sp; sp = sp->next) {
+ sp->shutting_down = 1;
+ grpc_winsocket_shutdown(sp->socket);
+ }
+ gpr_mu_unlock(&s->mu);
+
+ if (immediately_done) {
+ finish_shutdown(exec_ctx, s);
+ }
+}
+
+void grpc_tcp_server_unref(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) {
+ if (gpr_unref(&s->refs)) {
+ /* Complete shutdown_starting work before destroying. */
+ grpc_exec_ctx local_exec_ctx = GRPC_EXEC_CTX_INIT;
+ gpr_mu_lock(&s->mu);
+ grpc_exec_ctx_enqueue_list(&local_exec_ctx, &s->shutdown_starting, NULL);
+ gpr_mu_unlock(&s->mu);
+ if (exec_ctx == NULL) {
+ grpc_exec_ctx_flush(&local_exec_ctx);
+ tcp_server_destroy(&local_exec_ctx, s);
+ grpc_exec_ctx_finish(&local_exec_ctx);
+ } else {
+ grpc_exec_ctx_finish(&local_exec_ctx);
+ tcp_server_destroy(exec_ctx, s);
+ }
+ }
+}
+
+/* Prepare (bind) a recently-created socket for listening. */
+static int prepare_socket(SOCKET sock, const struct sockaddr *addr,
+ size_t addr_len) {
+ struct sockaddr_storage sockname_temp;
+ socklen_t sockname_len;
+
+ if (sock == INVALID_SOCKET) goto error;
+
+ if (!grpc_tcp_prepare_socket(sock)) {
+ char *utf8_message = gpr_format_message(WSAGetLastError());
+ gpr_log(GPR_ERROR, "Unable to prepare socket: %s", utf8_message);
+ gpr_free(utf8_message);
+ goto error;
+ }
+
+ if (bind(sock, addr, (int)addr_len) == SOCKET_ERROR) {
+ char *addr_str;
+ char *utf8_message = gpr_format_message(WSAGetLastError());
+ grpc_sockaddr_to_string(&addr_str, addr, 0);
+ gpr_log(GPR_ERROR, "bind addr=%s: %s", addr_str, utf8_message);
+ gpr_free(utf8_message);
+ gpr_free(addr_str);
+ goto error;
+ }
+
+ if (listen(sock, SOMAXCONN) == SOCKET_ERROR) {
+ char *utf8_message = gpr_format_message(WSAGetLastError());
+ gpr_log(GPR_ERROR, "listen: %s", utf8_message);
+ gpr_free(utf8_message);
+ goto error;
+ }
+
+ sockname_len = sizeof(sockname_temp);
+ if (getsockname(sock, (struct sockaddr *)&sockname_temp, &sockname_len) ==
+ SOCKET_ERROR) {
+ char *utf8_message = gpr_format_message(WSAGetLastError());
+ gpr_log(GPR_ERROR, "getsockname: %s", utf8_message);
+ gpr_free(utf8_message);
+ goto error;
+ }
+
+ return grpc_sockaddr_get_port((struct sockaddr *)&sockname_temp);
+
+error:
+ if (sock != INVALID_SOCKET) closesocket(sock);
+ return -1;
+}
+
+static void decrement_active_ports_and_notify(grpc_exec_ctx *exec_ctx,
+ grpc_tcp_listener *sp) {
+ int notify = 0;
+ sp->shutting_down = 0;
+ gpr_mu_lock(&sp->server->mu);
+ GPR_ASSERT(sp->server->active_ports > 0);
+ if (0 == --sp->server->active_ports) {
+ notify = 1;
+ }
+ gpr_mu_unlock(&sp->server->mu);
+ if (notify) {
+ finish_shutdown(exec_ctx, sp->server);
+ }
+}
+
+/* In order to do an async accept, we need to create a socket first which
+ will be the one assigned to the new incoming connection. */
+static void start_accept(grpc_exec_ctx *exec_ctx, grpc_tcp_listener *port) {
+ SOCKET sock = INVALID_SOCKET;
+ char *message;
+ char *utf8_message;
+ BOOL success;
+ DWORD addrlen = sizeof(struct sockaddr_in6) + 16;
+ DWORD bytes_received = 0;
+
+ sock = WSASocket(AF_INET6, SOCK_STREAM, IPPROTO_TCP, NULL, 0,
+ WSA_FLAG_OVERLAPPED);
+
+ if (sock == INVALID_SOCKET) {
+ message = "Unable to create socket: %s";
+ goto failure;
+ }
+
+ if (!grpc_tcp_prepare_socket(sock)) {
+ message = "Unable to prepare socket: %s";
+ goto failure;
+ }
+
+ /* Start the "accept" asynchronously. */
+ success = port->AcceptEx(port->socket->socket, sock, port->addresses, 0,
+ addrlen, addrlen, &bytes_received,
+ &port->socket->read_info.overlapped);
+
+ /* It is possible to get an accept immediately without delay. However, we
+ will still get an IOCP notification for it. So let's just ignore it. */
+ if (!success) {
+ int error = WSAGetLastError();
+ if (error != ERROR_IO_PENDING) {
+ message = "AcceptEx failed: %s";
+ goto failure;
+ }
+ }
+
+ /* We're ready to do the accept. Calling grpc_socket_notify_on_read may
+ immediately process an accept that happened in the meantime. */
+ port->new_socket = sock;
+ grpc_socket_notify_on_read(exec_ctx, port->socket, &port->on_accept);
+ return;
+
+failure:
+ if (port->shutting_down) {
+ /* We are abandoning the listener port, take that into account to prevent
+ occasional hangs on shutdown. The hang happens when sp->shutting_down
+ change is not seen by on_accept and we proceed to trying new accept,
+ but we fail there because the listening port has been closed in the
+ meantime. */
+ decrement_active_ports_and_notify(exec_ctx, port);
+ return;
+ }
+ utf8_message = gpr_format_message(WSAGetLastError());
+ gpr_log(GPR_ERROR, message, utf8_message);
+ gpr_free(utf8_message);
+ if (sock != INVALID_SOCKET) closesocket(sock);
+}
+
+/* Event manager callback when reads are ready. */
+static void on_accept(grpc_exec_ctx *exec_ctx, void *arg, bool from_iocp) {
+ grpc_tcp_listener *sp = arg;
+ grpc_tcp_server_acceptor acceptor = {sp->server, sp->port_index, 0};
+ SOCKET sock = sp->new_socket;
+ grpc_winsocket_callback_info *info = &sp->socket->read_info;
+ grpc_endpoint *ep = NULL;
+ struct sockaddr_storage peer_name;
+ char *peer_name_string;
+ char *fd_name;
+ int peer_name_len = sizeof(peer_name);
+ DWORD transfered_bytes;
+ DWORD flags;
+ BOOL wsa_success;
+ int err;
+
+ /* The general mechanism for shutting down is to queue abortion calls. While
+ this is necessary in the read/write case, it's useless for the accept
+ case. We only need to adjust the pending callback count */
+ if (!from_iocp) {
+ return;
+ }
+
+ /* The IOCP notified us of a completed operation. Let's grab the results,
+ and act accordingly. */
+ transfered_bytes = 0;
+ wsa_success = WSAGetOverlappedResult(sock, &info->overlapped,
+ &transfered_bytes, FALSE, &flags);
+ if (!wsa_success) {
+ if (sp->shutting_down) {
+ /* During the shutdown case, we ARE expecting an error. So that's well,
+ and we can wake up the shutdown thread. */
+ decrement_active_ports_and_notify(exec_ctx, sp);
+ return;
+ } else {
+ char *utf8_message = gpr_format_message(WSAGetLastError());
+ gpr_log(GPR_ERROR, "on_accept error: %s", utf8_message);
+ gpr_free(utf8_message);
+ closesocket(sock);
+ }
+ } else {
+ if (!sp->shutting_down) {
+ peer_name_string = NULL;
+ err = setsockopt(sock, SOL_SOCKET, SO_UPDATE_ACCEPT_CONTEXT,
+ (char *)&sp->socket->socket, sizeof(sp->socket->socket));
+ if (err) {
+ char *utf8_message = gpr_format_message(WSAGetLastError());
+ gpr_log(GPR_ERROR, "setsockopt error: %s", utf8_message);
+ gpr_free(utf8_message);
+ }
+ err = getpeername(sock, (struct sockaddr *)&peer_name, &peer_name_len);
+ if (!err) {
+ peer_name_string = grpc_sockaddr_to_uri((struct sockaddr *)&peer_name);
+ } else {
+ char *utf8_message = gpr_format_message(WSAGetLastError());
+ gpr_log(GPR_ERROR, "getpeername error: %s", utf8_message);
+ gpr_free(utf8_message);
+ }
+ gpr_asprintf(&fd_name, "tcp_server:%s", peer_name_string);
+ ep = grpc_tcp_create(grpc_winsocket_create(sock, fd_name),
+ peer_name_string);
+ gpr_free(fd_name);
+ gpr_free(peer_name_string);
+ } else {
+ closesocket(sock);
+ }
+ }
+
+ /* The only time we should call our callback, is where we successfully
+ managed to accept a connection, and created an endpoint. */
+ if (ep)
+ sp->server->on_accept_cb(exec_ctx, sp->server->on_accept_cb_arg, ep,
+ &acceptor);
+ /* As we were notified from the IOCP of one and exactly one accept,
+ the former socked we created has now either been destroy or assigned
+ to the new connection. We need to create a new one for the next
+ connection. */
+ start_accept(exec_ctx, sp);
+}
+
+static grpc_tcp_listener *add_socket_to_server(grpc_tcp_server *s, SOCKET sock,
+ const struct sockaddr *addr,
+ size_t addr_len,
+ unsigned port_index) {
+ grpc_tcp_listener *sp = NULL;
+ int port;
+ int status;
+ GUID guid = WSAID_ACCEPTEX;
+ DWORD ioctl_num_bytes;
+ LPFN_ACCEPTEX AcceptEx;
+
+ if (sock == INVALID_SOCKET) return NULL;
+
+ /* We need to grab the AcceptEx pointer for that port, as it may be
+ interface-dependent. We'll cache it to avoid doing that again. */
+ status =
+ WSAIoctl(sock, SIO_GET_EXTENSION_FUNCTION_POINTER, &guid, sizeof(guid),
+ &AcceptEx, sizeof(AcceptEx), &ioctl_num_bytes, NULL, NULL);
+
+ if (status != 0) {
+ char *utf8_message = gpr_format_message(WSAGetLastError());
+ gpr_log(GPR_ERROR, "on_connect error: %s", utf8_message);
+ gpr_free(utf8_message);
+ closesocket(sock);
+ return NULL;
+ }
+
+ port = prepare_socket(sock, addr, addr_len);
+ if (port >= 0) {
+ gpr_mu_lock(&s->mu);
+ GPR_ASSERT(!s->on_accept_cb && "must add ports before starting server");
+ sp = gpr_malloc(sizeof(grpc_tcp_listener));
+ sp->next = NULL;
+ if (s->head == NULL) {
+ s->head = sp;
+ } else {
+ s->tail->next = sp;
+ }
+ s->tail = sp;
+ sp->server = s;
+ sp->socket = grpc_winsocket_create(sock, "listener");
+ sp->shutting_down = 0;
+ sp->AcceptEx = AcceptEx;
+ sp->new_socket = INVALID_SOCKET;
+ sp->port = port;
+ sp->port_index = port_index;
+ grpc_closure_init(&sp->on_accept, on_accept, sp);
+ GPR_ASSERT(sp->socket);
+ gpr_mu_unlock(&s->mu);
+ }
+
+ return sp;
+}
+
+int grpc_tcp_server_add_port(grpc_tcp_server *s, const void *addr,
+ size_t addr_len) {
+ grpc_tcp_listener *sp;
+ SOCKET sock;
+ struct sockaddr_in6 addr6_v4mapped;
+ struct sockaddr_in6 wildcard;
+ struct sockaddr *allocated_addr = NULL;
+ struct sockaddr_storage sockname_temp;
+ socklen_t sockname_len;
+ int port;
+ unsigned port_index = 0;
+ if (s->tail != NULL) {
+ port_index = s->tail->port_index + 1;
+ }
+
+ /* Check if this is a wildcard port, and if so, try to keep the port the same
+ as some previously created listener. */
+ if (grpc_sockaddr_get_port(addr) == 0) {
+ for (sp = s->head; sp; sp = sp->next) {
+ sockname_len = sizeof(sockname_temp);
+ if (0 == getsockname(sp->socket->socket,
+ (struct sockaddr *)&sockname_temp, &sockname_len)) {
+ port = grpc_sockaddr_get_port((struct sockaddr *)&sockname_temp);
+ if (port > 0) {
+ allocated_addr = malloc(addr_len);
+ memcpy(allocated_addr, addr, addr_len);
+ grpc_sockaddr_set_port(allocated_addr, port);
+ addr = allocated_addr;
+ break;
+ }
+ }
+ }
+ }
+
+ if (grpc_sockaddr_to_v4mapped(addr, &addr6_v4mapped)) {
+ addr = (const struct sockaddr *)&addr6_v4mapped;
+ addr_len = sizeof(addr6_v4mapped);
+ }
+
+ /* Treat :: or 0.0.0.0 as a family-agnostic wildcard. */
+ if (grpc_sockaddr_is_wildcard(addr, &port)) {
+ grpc_sockaddr_make_wildcard6(port, &wildcard);
+
+ addr = (struct sockaddr *)&wildcard;
+ addr_len = sizeof(wildcard);
+ }
+
+ sock = WSASocket(AF_INET6, SOCK_STREAM, IPPROTO_TCP, NULL, 0,
+ WSA_FLAG_OVERLAPPED);
+ if (sock == INVALID_SOCKET) {
+ char *utf8_message = gpr_format_message(WSAGetLastError());
+ gpr_log(GPR_ERROR, "unable to create socket: %s", utf8_message);
+ gpr_free(utf8_message);
+ }
+
+ sp = add_socket_to_server(s, sock, addr, addr_len, port_index);
+ gpr_free(allocated_addr);
+
+ if (sp) {
+ return sp->port;
+ } else {
+ return -1;
+ }
+}
+
+unsigned grpc_tcp_server_port_fd_count(grpc_tcp_server *s,
+ unsigned port_index) {
+ grpc_tcp_listener *sp;
+ for (sp = s->head; sp && port_index != 0; sp = sp->next, --port_index)
+ ;
+ if (sp) {
+ return 1;
+ } else {
+ return 0;
+ }
+}
+
+int grpc_tcp_server_port_fd(grpc_tcp_server *s, unsigned port_index,
+ unsigned fd_index) {
+ grpc_tcp_listener *sp;
+ if (fd_index != 0) {
+ /* Windows implementation has only one fd per port_index. */
+ return -1;
+ }
+ for (sp = s->head; sp && port_index != 0; sp = sp->next, --port_index)
+ ;
+ if (sp) {
+ return _open_osfhandle((intptr_t)sp->socket->socket, 0);
+ } else {
+ return -1;
+ }
+}
+
+void grpc_tcp_server_start(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s,
+ grpc_pollset **pollset, size_t pollset_count,
+ grpc_tcp_server_cb on_accept_cb,
+ void *on_accept_cb_arg) {
+ grpc_tcp_listener *sp;
+ GPR_ASSERT(on_accept_cb);
+ gpr_mu_lock(&s->mu);
+ GPR_ASSERT(!s->on_accept_cb);
+ GPR_ASSERT(s->active_ports == 0);
+ s->on_accept_cb = on_accept_cb;
+ s->on_accept_cb_arg = on_accept_cb_arg;
+ for (sp = s->head; sp; sp = sp->next) {
+ start_accept(exec_ctx, sp);
+ s->active_ports++;
+ }
+ gpr_mu_unlock(&s->mu);
+}
+
+#endif /* GPR_WINSOCK_SOCKET */
diff --git a/src/core/lib/iomgr/tcp_windows.c b/src/core/lib/iomgr/tcp_windows.c
new file mode 100644
index 0000000000..c1ce725f2c
--- /dev/null
+++ b/src/core/lib/iomgr/tcp_windows.c
@@ -0,0 +1,402 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_WINSOCK_SOCKET
+
+#include "src/core/lib/iomgr/sockaddr_win32.h"
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/log_win32.h>
+#include <grpc/support/slice_buffer.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/useful.h>
+
+#include "src/core/lib/iomgr/iocp_windows.h"
+#include "src/core/lib/iomgr/sockaddr.h"
+#include "src/core/lib/iomgr/sockaddr_utils.h"
+#include "src/core/lib/iomgr/socket_windows.h"
+#include "src/core/lib/iomgr/tcp_client.h"
+#include "src/core/lib/iomgr/timer.h"
+
+static int set_non_block(SOCKET sock) {
+ int status;
+ unsigned long param = 1;
+ DWORD ret;
+ status =
+ WSAIoctl(sock, FIONBIO, &param, sizeof(param), NULL, 0, &ret, NULL, NULL);
+ return status == 0;
+}
+
+static int set_dualstack(SOCKET sock) {
+ int status;
+ unsigned long param = 0;
+ status = setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, (const char *)&param,
+ sizeof(param));
+ return status == 0;
+}
+
+int grpc_tcp_prepare_socket(SOCKET sock) {
+ if (!set_non_block(sock)) return 0;
+ if (!set_dualstack(sock)) return 0;
+ return 1;
+}
+
+typedef struct grpc_tcp {
+ /* This is our C++ class derivation emulation. */
+ grpc_endpoint base;
+ /* The one socket this endpoint is using. */
+ grpc_winsocket *socket;
+ /* Refcounting how many operations are in progress. */
+ gpr_refcount refcount;
+
+ grpc_closure on_read;
+ grpc_closure on_write;
+
+ grpc_closure *read_cb;
+ grpc_closure *write_cb;
+ gpr_slice read_slice;
+ gpr_slice_buffer *write_slices;
+ gpr_slice_buffer *read_slices;
+
+ /* The IO Completion Port runs from another thread. We need some mechanism
+ to protect ourselves when requesting a shutdown. */
+ gpr_mu mu;
+ int shutting_down;
+
+ char *peer_string;
+} grpc_tcp;
+
+static void tcp_free(grpc_tcp *tcp) {
+ grpc_winsocket_destroy(tcp->socket);
+ gpr_mu_destroy(&tcp->mu);
+ gpr_free(tcp->peer_string);
+ gpr_free(tcp);
+}
+
+/*#define GRPC_TCP_REFCOUNT_DEBUG*/
+#ifdef GRPC_TCP_REFCOUNT_DEBUG
+#define TCP_UNREF(tcp, reason) tcp_unref((tcp), (reason), __FILE__, __LINE__)
+#define TCP_REF(tcp, reason) tcp_ref((tcp), (reason), __FILE__, __LINE__)
+static void tcp_unref(grpc_tcp *tcp, const char *reason, const char *file,
+ int line) {
+ gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "TCP unref %p : %s %d -> %d", tcp,
+ reason, tcp->refcount.count, tcp->refcount.count - 1);
+ if (gpr_unref(&tcp->refcount)) {
+ tcp_free(tcp);
+ }
+}
+
+static void tcp_ref(grpc_tcp *tcp, const char *reason, const char *file,
+ int line) {
+ gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "TCP ref %p : %s %d -> %d", tcp,
+ reason, tcp->refcount.count, tcp->refcount.count + 1);
+ gpr_ref(&tcp->refcount);
+}
+#else
+#define TCP_UNREF(tcp, reason) tcp_unref((tcp))
+#define TCP_REF(tcp, reason) tcp_ref((tcp))
+static void tcp_unref(grpc_tcp *tcp) {
+ if (gpr_unref(&tcp->refcount)) {
+ tcp_free(tcp);
+ }
+}
+
+static void tcp_ref(grpc_tcp *tcp) { gpr_ref(&tcp->refcount); }
+#endif
+
+/* Asynchronous callback from the IOCP, or the background thread. */
+static void on_read(grpc_exec_ctx *exec_ctx, void *tcpp, bool success) {
+ grpc_tcp *tcp = tcpp;
+ grpc_closure *cb = tcp->read_cb;
+ grpc_winsocket *socket = tcp->socket;
+ gpr_slice sub;
+ grpc_winsocket_callback_info *info = &socket->read_info;
+
+ if (success) {
+ if (info->wsa_error != 0 && !tcp->shutting_down) {
+ if (info->wsa_error != WSAECONNRESET) {
+ char *utf8_message = gpr_format_message(info->wsa_error);
+ gpr_log(GPR_ERROR, "ReadFile overlapped error: %s", utf8_message);
+ gpr_free(utf8_message);
+ }
+ success = 0;
+ gpr_slice_unref(tcp->read_slice);
+ } else {
+ if (info->bytes_transfered != 0 && !tcp->shutting_down) {
+ sub = gpr_slice_sub_no_ref(tcp->read_slice, 0, info->bytes_transfered);
+ gpr_slice_buffer_add(tcp->read_slices, sub);
+ success = 1;
+ } else {
+ gpr_slice_unref(tcp->read_slice);
+ success = 0;
+ }
+ }
+ }
+
+ tcp->read_cb = NULL;
+ TCP_UNREF(tcp, "read");
+ if (cb) {
+ cb->cb(exec_ctx, cb->cb_arg, success);
+ }
+}
+
+static void win_read(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
+ gpr_slice_buffer *read_slices, grpc_closure *cb) {
+ grpc_tcp *tcp = (grpc_tcp *)ep;
+ grpc_winsocket *handle = tcp->socket;
+ grpc_winsocket_callback_info *info = &handle->read_info;
+ int status;
+ DWORD bytes_read = 0;
+ DWORD flags = 0;
+ WSABUF buffer;
+
+ if (tcp->shutting_down) {
+ grpc_exec_ctx_enqueue(exec_ctx, cb, false, NULL);
+ return;
+ }
+
+ tcp->read_cb = cb;
+ tcp->read_slices = read_slices;
+ gpr_slice_buffer_reset_and_unref(read_slices);
+
+ tcp->read_slice = gpr_slice_malloc(8192);
+
+ buffer.len = (ULONG)GPR_SLICE_LENGTH(
+ tcp->read_slice); // we know slice size fits in 32bit.
+ buffer.buf = (char *)GPR_SLICE_START_PTR(tcp->read_slice);
+
+ TCP_REF(tcp, "read");
+
+ /* First let's try a synchronous, non-blocking read. */
+ status =
+ WSARecv(tcp->socket->socket, &buffer, 1, &bytes_read, &flags, NULL, NULL);
+ info->wsa_error = status == 0 ? 0 : WSAGetLastError();
+
+ /* Did we get data immediately ? Yay. */
+ if (info->wsa_error != WSAEWOULDBLOCK) {
+ info->bytes_transfered = bytes_read;
+ grpc_exec_ctx_enqueue(exec_ctx, &tcp->on_read, true, NULL);
+ return;
+ }
+
+ /* Otherwise, let's retry, by queuing a read. */
+ memset(&tcp->socket->read_info.overlapped, 0, sizeof(OVERLAPPED));
+ status = WSARecv(tcp->socket->socket, &buffer, 1, &bytes_read, &flags,
+ &info->overlapped, NULL);
+
+ if (status != 0) {
+ int wsa_error = WSAGetLastError();
+ if (wsa_error != WSA_IO_PENDING) {
+ info->wsa_error = wsa_error;
+ grpc_exec_ctx_enqueue(exec_ctx, &tcp->on_read, false, NULL);
+ return;
+ }
+ }
+
+ grpc_socket_notify_on_read(exec_ctx, tcp->socket, &tcp->on_read);
+}
+
+/* Asynchronous callback from the IOCP, or the background thread. */
+static void on_write(grpc_exec_ctx *exec_ctx, void *tcpp, bool success) {
+ grpc_tcp *tcp = (grpc_tcp *)tcpp;
+ grpc_winsocket *handle = tcp->socket;
+ grpc_winsocket_callback_info *info = &handle->write_info;
+ grpc_closure *cb;
+
+ gpr_mu_lock(&tcp->mu);
+ cb = tcp->write_cb;
+ tcp->write_cb = NULL;
+ gpr_mu_unlock(&tcp->mu);
+
+ if (success) {
+ if (info->wsa_error != 0) {
+ if (info->wsa_error != WSAECONNRESET) {
+ char *utf8_message = gpr_format_message(info->wsa_error);
+ gpr_log(GPR_ERROR, "WSASend overlapped error: %s", utf8_message);
+ gpr_free(utf8_message);
+ }
+ success = 0;
+ } else {
+ GPR_ASSERT(info->bytes_transfered == tcp->write_slices->length);
+ }
+ }
+
+ TCP_UNREF(tcp, "write");
+ cb->cb(exec_ctx, cb->cb_arg, success);
+}
+
+/* Initiates a write. */
+static void win_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
+ gpr_slice_buffer *slices, grpc_closure *cb) {
+ grpc_tcp *tcp = (grpc_tcp *)ep;
+ grpc_winsocket *socket = tcp->socket;
+ grpc_winsocket_callback_info *info = &socket->write_info;
+ unsigned i;
+ DWORD bytes_sent;
+ int status;
+ WSABUF local_buffers[16];
+ WSABUF *allocated = NULL;
+ WSABUF *buffers = local_buffers;
+ size_t len;
+
+ if (tcp->shutting_down) {
+ grpc_exec_ctx_enqueue(exec_ctx, cb, false, NULL);
+ return;
+ }
+
+ tcp->write_cb = cb;
+ tcp->write_slices = slices;
+ GPR_ASSERT(tcp->write_slices->count <= UINT_MAX);
+ if (tcp->write_slices->count > GPR_ARRAY_SIZE(local_buffers)) {
+ buffers = (WSABUF *)gpr_malloc(sizeof(WSABUF) * tcp->write_slices->count);
+ allocated = buffers;
+ }
+
+ for (i = 0; i < tcp->write_slices->count; i++) {
+ len = GPR_SLICE_LENGTH(tcp->write_slices->slices[i]);
+ GPR_ASSERT(len <= ULONG_MAX);
+ buffers[i].len = (ULONG)len;
+ buffers[i].buf = (char *)GPR_SLICE_START_PTR(tcp->write_slices->slices[i]);
+ }
+
+ /* First, let's try a synchronous, non-blocking write. */
+ status = WSASend(socket->socket, buffers, (DWORD)tcp->write_slices->count,
+ &bytes_sent, 0, NULL, NULL);
+ info->wsa_error = status == 0 ? 0 : WSAGetLastError();
+
+ /* We would kind of expect to get a WSAEWOULDBLOCK here, especially on a busy
+ connection that has its send queue filled up. But if we don't, then we can
+ avoid doing an async write operation at all. */
+ if (info->wsa_error != WSAEWOULDBLOCK) {
+ bool ok = false;
+ if (status == 0) {
+ ok = true;
+ GPR_ASSERT(bytes_sent == tcp->write_slices->length);
+ } else {
+ if (info->wsa_error != WSAECONNRESET) {
+ char *utf8_message = gpr_format_message(info->wsa_error);
+ gpr_log(GPR_ERROR, "WSASend error: %s", utf8_message);
+ gpr_free(utf8_message);
+ }
+ }
+ if (allocated) gpr_free(allocated);
+ grpc_exec_ctx_enqueue(exec_ctx, cb, ok, NULL);
+ return;
+ }
+
+ TCP_REF(tcp, "write");
+
+ /* If we got a WSAEWOULDBLOCK earlier, then we need to re-do the same
+ operation, this time asynchronously. */
+ memset(&socket->write_info.overlapped, 0, sizeof(OVERLAPPED));
+ status = WSASend(socket->socket, buffers, (DWORD)tcp->write_slices->count,
+ &bytes_sent, 0, &socket->write_info.overlapped, NULL);
+ if (allocated) gpr_free(allocated);
+
+ if (status != 0) {
+ int wsa_error = WSAGetLastError();
+ if (wsa_error != WSA_IO_PENDING) {
+ TCP_UNREF(tcp, "write");
+ grpc_exec_ctx_enqueue(exec_ctx, cb, false, NULL);
+ return;
+ }
+ }
+
+ /* As all is now setup, we can now ask for the IOCP notification. It may
+ trigger the callback immediately however, but no matter. */
+ grpc_socket_notify_on_write(exec_ctx, socket, &tcp->on_write);
+}
+
+static void win_add_to_pollset(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
+ grpc_pollset *ps) {
+ grpc_tcp *tcp;
+ (void)ps;
+ tcp = (grpc_tcp *)ep;
+ grpc_iocp_add_socket(tcp->socket);
+}
+
+static void win_add_to_pollset_set(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
+ grpc_pollset_set *pss) {
+ grpc_tcp *tcp;
+ (void)pss;
+ tcp = (grpc_tcp *)ep;
+ grpc_iocp_add_socket(tcp->socket);
+}
+
+/* Initiates a shutdown of the TCP endpoint. This will queue abort callbacks
+ for the potential read and write operations. It is up to the caller to
+ guarantee this isn't called in parallel to a read or write request, so
+ we're not going to protect against these. However the IO Completion Port
+ callback will happen from another thread, so we need to protect against
+ concurrent access of the data structure in that regard. */
+static void win_shutdown(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep) {
+ grpc_tcp *tcp = (grpc_tcp *)ep;
+ gpr_mu_lock(&tcp->mu);
+ /* At that point, what may happen is that we're already inside the IOCP
+ callback. See the comments in on_read and on_write. */
+ tcp->shutting_down = 1;
+ grpc_winsocket_shutdown(tcp->socket);
+ gpr_mu_unlock(&tcp->mu);
+}
+
+static void win_destroy(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep) {
+ grpc_tcp *tcp = (grpc_tcp *)ep;
+ TCP_UNREF(tcp, "destroy");
+}
+
+static char *win_get_peer(grpc_endpoint *ep) {
+ grpc_tcp *tcp = (grpc_tcp *)ep;
+ return gpr_strdup(tcp->peer_string);
+}
+
+static grpc_endpoint_vtable vtable = {
+ win_read, win_write, win_add_to_pollset, win_add_to_pollset_set,
+ win_shutdown, win_destroy, win_get_peer};
+
+grpc_endpoint *grpc_tcp_create(grpc_winsocket *socket, char *peer_string) {
+ grpc_tcp *tcp = (grpc_tcp *)gpr_malloc(sizeof(grpc_tcp));
+ memset(tcp, 0, sizeof(grpc_tcp));
+ tcp->base.vtable = &vtable;
+ tcp->socket = socket;
+ gpr_mu_init(&tcp->mu);
+ gpr_ref_init(&tcp->refcount, 1);
+ grpc_closure_init(&tcp->on_read, on_read, tcp);
+ grpc_closure_init(&tcp->on_write, on_write, tcp);
+ tcp->peer_string = gpr_strdup(peer_string);
+ return &tcp->base;
+}
+
+#endif /* GPR_WINSOCK_SOCKET */
diff --git a/src/core/lib/iomgr/tcp_windows.h b/src/core/lib/iomgr/tcp_windows.h
new file mode 100644
index 0000000000..7a9ebd85eb
--- /dev/null
+++ b/src/core/lib/iomgr/tcp_windows.h
@@ -0,0 +1,57 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_TCP_WINDOWS_H
+#define GRPC_CORE_LIB_IOMGR_TCP_WINDOWS_H
+/*
+ Low level TCP "bottom half" implementation, for use by transports built on
+ top of a TCP connection.
+
+ Note that this file does not (yet) include APIs for creating the socket in
+ the first place.
+
+ All calls passing slice transfer ownership of a slice refcount unless
+ otherwise specified.
+*/
+
+#include "src/core/lib/iomgr/endpoint.h"
+#include "src/core/lib/iomgr/socket_windows.h"
+
+/* Create a tcp endpoint given a winsock handle.
+ * Takes ownership of the handle.
+ */
+grpc_endpoint *grpc_tcp_create(grpc_winsocket *socket, char *peer_string);
+
+int grpc_tcp_prepare_socket(SOCKET sock);
+
+#endif /* GRPC_CORE_LIB_IOMGR_TCP_WINDOWS_H */
diff --git a/src/core/lib/iomgr/time_averaged_stats.c b/src/core/lib/iomgr/time_averaged_stats.c
new file mode 100644
index 0000000000..f24d68087e
--- /dev/null
+++ b/src/core/lib/iomgr/time_averaged_stats.c
@@ -0,0 +1,77 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/iomgr/time_averaged_stats.h"
+
+void grpc_time_averaged_stats_init(grpc_time_averaged_stats* stats,
+ double init_avg, double regress_weight,
+ double persistence_factor) {
+ stats->init_avg = init_avg;
+ stats->regress_weight = regress_weight;
+ stats->persistence_factor = persistence_factor;
+ stats->batch_total_value = 0;
+ stats->batch_num_samples = 0;
+ stats->aggregate_total_weight = 0;
+ stats->aggregate_weighted_avg = init_avg;
+}
+
+void grpc_time_averaged_stats_add_sample(grpc_time_averaged_stats* stats,
+ double value) {
+ stats->batch_total_value += value;
+ ++stats->batch_num_samples;
+}
+
+double grpc_time_averaged_stats_update_average(
+ grpc_time_averaged_stats* stats) {
+ /* Start with the current batch: */
+ double weighted_sum = stats->batch_total_value;
+ double total_weight = stats->batch_num_samples;
+ if (stats->regress_weight > 0) {
+ /* Add in the regression towards init_avg_: */
+ weighted_sum += stats->regress_weight * stats->init_avg;
+ total_weight += stats->regress_weight;
+ }
+ if (stats->persistence_factor > 0) {
+ /* Add in the persistence: */
+ const double prev_sample_weight =
+ stats->persistence_factor * stats->aggregate_total_weight;
+ weighted_sum += prev_sample_weight * stats->aggregate_weighted_avg;
+ total_weight += prev_sample_weight;
+ }
+ stats->aggregate_weighted_avg =
+ (total_weight > 0) ? (weighted_sum / total_weight) : stats->init_avg;
+ stats->aggregate_total_weight = total_weight;
+ stats->batch_num_samples = 0;
+ stats->batch_total_value = 0;
+ return stats->aggregate_weighted_avg;
+}
diff --git a/src/core/lib/iomgr/time_averaged_stats.h b/src/core/lib/iomgr/time_averaged_stats.h
new file mode 100644
index 0000000000..4a662e17ec
--- /dev/null
+++ b/src/core/lib/iomgr/time_averaged_stats.h
@@ -0,0 +1,88 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_TIME_AVERAGED_STATS_H
+#define GRPC_CORE_LIB_IOMGR_TIME_AVERAGED_STATS_H
+
+/* This tracks a time-decaying weighted average. It works by collecting
+ batches of samples and then mixing their average into a time-decaying
+ weighted mean. It is designed for batch operations where we do many adds
+ before updating the average. */
+
+typedef struct {
+ /* The initial average value. This is the reported average until the first
+ grpc_time_averaged_stats_update_average call. If a positive regress_weight
+ is used, we also regress towards this value on each update. */
+ double init_avg;
+ /* The sample weight of "init_avg" that is mixed in with each call to
+ grpc_time_averaged_stats_update_average. If the calls to
+ grpc_time_averaged_stats_add_sample stop, this will cause the average to
+ regress back to the mean. This should be non-negative. Set it to 0 to
+ disable the bias. A value of 1 has the effect of adding in 1 bonus sample
+ with value init_avg to each sample period. */
+ double regress_weight;
+ /* This determines the rate of decay of the time-averaging from one period
+ to the next by scaling the aggregate_total_weight of samples from prior
+ periods when combining with the latest period. It should be in the range
+ [0,1]. A higher value adapts more slowly. With a value of 0.5, if the
+ batches each have k samples, the samples_in_avg_ will grow to 2 k, so the
+ weighting of the time average will eventually be 1/3 new batch and 2/3
+ old average. */
+ double persistence_factor;
+
+ /* The total value of samples since the last UpdateAverage(). */
+ double batch_total_value;
+ /* The number of samples since the last UpdateAverage(). */
+ double batch_num_samples;
+ /* The time-decayed sum of batch_num_samples_ over previous batches. This is
+ the "weight" of the old aggregate_weighted_avg_ when updating the
+ average. */
+ double aggregate_total_weight;
+ /* A time-decayed average of the (batch_total_value_ / batch_num_samples_),
+ computed by decaying the samples_in_avg_ weight in the weighted average. */
+ double aggregate_weighted_avg;
+} grpc_time_averaged_stats;
+
+/* See the comments on the members above for an explanation of init_avg,
+ regress_weight, and persistence_factor. */
+void grpc_time_averaged_stats_init(grpc_time_averaged_stats* stats,
+ double init_avg, double regress_weight,
+ double persistence_factor);
+/* Add a sample to the current batch. */
+void grpc_time_averaged_stats_add_sample(grpc_time_averaged_stats* stats,
+ double value);
+/* Complete a batch and compute the new estimate of the average sample
+ value. */
+double grpc_time_averaged_stats_update_average(grpc_time_averaged_stats* stats);
+
+#endif /* GRPC_CORE_LIB_IOMGR_TIME_AVERAGED_STATS_H */
diff --git a/src/core/lib/iomgr/timer.c b/src/core/lib/iomgr/timer.c
new file mode 100644
index 0000000000..4748f9b270
--- /dev/null
+++ b/src/core/lib/iomgr/timer.c
@@ -0,0 +1,356 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/iomgr/timer.h"
+
+#include <grpc/support/log.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/useful.h>
+#include "src/core/lib/iomgr/time_averaged_stats.h"
+#include "src/core/lib/iomgr/timer_heap.h"
+
+#define INVALID_HEAP_INDEX 0xffffffffu
+
+#define LOG2_NUM_SHARDS 5
+#define NUM_SHARDS (1 << LOG2_NUM_SHARDS)
+#define ADD_DEADLINE_SCALE 0.33
+#define MIN_QUEUE_WINDOW_DURATION 0.01
+#define MAX_QUEUE_WINDOW_DURATION 1
+
+typedef struct {
+ gpr_mu mu;
+ grpc_time_averaged_stats stats;
+ /* All and only timers with deadlines <= this will be in the heap. */
+ gpr_timespec queue_deadline_cap;
+ gpr_timespec min_deadline;
+ /* Index in the g_shard_queue */
+ uint32_t shard_queue_index;
+ /* This holds all timers with deadlines < queue_deadline_cap. Timers in this
+ list have the top bit of their deadline set to 0. */
+ grpc_timer_heap heap;
+ /* This holds timers whose deadline is >= queue_deadline_cap. */
+ grpc_timer list;
+} shard_type;
+
+/* Protects g_shard_queue */
+static gpr_mu g_mu;
+/* Allow only one run_some_expired_timers at once */
+static gpr_mu g_checker_mu;
+static gpr_clock_type g_clock_type;
+static shard_type g_shards[NUM_SHARDS];
+/* Protected by g_mu */
+static shard_type *g_shard_queue[NUM_SHARDS];
+
+static int run_some_expired_timers(grpc_exec_ctx *exec_ctx, gpr_timespec now,
+ gpr_timespec *next, int success);
+
+static gpr_timespec compute_min_deadline(shard_type *shard) {
+ return grpc_timer_heap_is_empty(&shard->heap)
+ ? shard->queue_deadline_cap
+ : grpc_timer_heap_top(&shard->heap)->deadline;
+}
+
+void grpc_timer_list_init(gpr_timespec now) {
+ uint32_t i;
+
+ gpr_mu_init(&g_mu);
+ gpr_mu_init(&g_checker_mu);
+ g_clock_type = now.clock_type;
+
+ for (i = 0; i < NUM_SHARDS; i++) {
+ shard_type *shard = &g_shards[i];
+ gpr_mu_init(&shard->mu);
+ grpc_time_averaged_stats_init(&shard->stats, 1.0 / ADD_DEADLINE_SCALE, 0.1,
+ 0.5);
+ shard->queue_deadline_cap = now;
+ shard->shard_queue_index = i;
+ grpc_timer_heap_init(&shard->heap);
+ shard->list.next = shard->list.prev = &shard->list;
+ shard->min_deadline = compute_min_deadline(shard);
+ g_shard_queue[i] = shard;
+ }
+}
+
+void grpc_timer_list_shutdown(grpc_exec_ctx *exec_ctx) {
+ int i;
+ run_some_expired_timers(exec_ctx, gpr_inf_future(g_clock_type), NULL, 0);
+ for (i = 0; i < NUM_SHARDS; i++) {
+ shard_type *shard = &g_shards[i];
+ gpr_mu_destroy(&shard->mu);
+ grpc_timer_heap_destroy(&shard->heap);
+ }
+ gpr_mu_destroy(&g_mu);
+ gpr_mu_destroy(&g_checker_mu);
+}
+
+/* This is a cheap, but good enough, pointer hash for sharding the tasks: */
+static size_t shard_idx(const grpc_timer *info) {
+ size_t x = (size_t)info;
+ return ((x >> 4) ^ (x >> 9) ^ (x >> 14)) & (NUM_SHARDS - 1);
+}
+
+static double ts_to_dbl(gpr_timespec ts) {
+ return (double)ts.tv_sec + 1e-9 * ts.tv_nsec;
+}
+
+static gpr_timespec dbl_to_ts(double d) {
+ gpr_timespec ts;
+ ts.tv_sec = (int64_t)d;
+ ts.tv_nsec = (int32_t)(1e9 * (d - (double)ts.tv_sec));
+ ts.clock_type = GPR_TIMESPAN;
+ return ts;
+}
+
+static void list_join(grpc_timer *head, grpc_timer *timer) {
+ timer->next = head;
+ timer->prev = head->prev;
+ timer->next->prev = timer->prev->next = timer;
+}
+
+static void list_remove(grpc_timer *timer) {
+ timer->next->prev = timer->prev;
+ timer->prev->next = timer->next;
+}
+
+static void swap_adjacent_shards_in_queue(uint32_t first_shard_queue_index) {
+ shard_type *temp;
+ temp = g_shard_queue[first_shard_queue_index];
+ g_shard_queue[first_shard_queue_index] =
+ g_shard_queue[first_shard_queue_index + 1];
+ g_shard_queue[first_shard_queue_index + 1] = temp;
+ g_shard_queue[first_shard_queue_index]->shard_queue_index =
+ first_shard_queue_index;
+ g_shard_queue[first_shard_queue_index + 1]->shard_queue_index =
+ first_shard_queue_index + 1;
+}
+
+static void note_deadline_change(shard_type *shard) {
+ while (shard->shard_queue_index > 0 &&
+ gpr_time_cmp(
+ shard->min_deadline,
+ g_shard_queue[shard->shard_queue_index - 1]->min_deadline) < 0) {
+ swap_adjacent_shards_in_queue(shard->shard_queue_index - 1);
+ }
+ while (shard->shard_queue_index < NUM_SHARDS - 1 &&
+ gpr_time_cmp(
+ shard->min_deadline,
+ g_shard_queue[shard->shard_queue_index + 1]->min_deadline) > 0) {
+ swap_adjacent_shards_in_queue(shard->shard_queue_index);
+ }
+}
+
+void grpc_timer_init(grpc_exec_ctx *exec_ctx, grpc_timer *timer,
+ gpr_timespec deadline, grpc_iomgr_cb_func timer_cb,
+ void *timer_cb_arg, gpr_timespec now) {
+ int is_first_timer = 0;
+ shard_type *shard = &g_shards[shard_idx(timer)];
+ GPR_ASSERT(deadline.clock_type == g_clock_type);
+ GPR_ASSERT(now.clock_type == g_clock_type);
+ grpc_closure_init(&timer->closure, timer_cb, timer_cb_arg);
+ timer->deadline = deadline;
+ timer->triggered = 0;
+
+ /* TODO(ctiller): check deadline expired */
+
+ gpr_mu_lock(&shard->mu);
+ grpc_time_averaged_stats_add_sample(&shard->stats,
+ ts_to_dbl(gpr_time_sub(deadline, now)));
+ if (gpr_time_cmp(deadline, shard->queue_deadline_cap) < 0) {
+ is_first_timer = grpc_timer_heap_add(&shard->heap, timer);
+ } else {
+ timer->heap_index = INVALID_HEAP_INDEX;
+ list_join(&shard->list, timer);
+ }
+ gpr_mu_unlock(&shard->mu);
+
+ /* Deadline may have decreased, we need to adjust the master queue. Note
+ that there is a potential racy unlocked region here. There could be a
+ reordering of multiple grpc_timer_init calls, at this point, but the < test
+ below should ensure that we err on the side of caution. There could
+ also be a race with grpc_timer_check, which might beat us to the lock. In
+ that case, it is possible that the timer that we added will have already
+ run by the time we hold the lock, but that too is a safe error.
+ Finally, it's possible that the grpc_timer_check that intervened failed to
+ trigger the new timer because the min_deadline hadn't yet been reduced.
+ In that case, the timer will simply have to wait for the next
+ grpc_timer_check. */
+ if (is_first_timer) {
+ gpr_mu_lock(&g_mu);
+ if (gpr_time_cmp(deadline, shard->min_deadline) < 0) {
+ gpr_timespec old_min_deadline = g_shard_queue[0]->min_deadline;
+ shard->min_deadline = deadline;
+ note_deadline_change(shard);
+ if (shard->shard_queue_index == 0 &&
+ gpr_time_cmp(deadline, old_min_deadline) < 0) {
+ grpc_kick_poller();
+ }
+ }
+ gpr_mu_unlock(&g_mu);
+ }
+}
+
+void grpc_timer_cancel(grpc_exec_ctx *exec_ctx, grpc_timer *timer) {
+ shard_type *shard = &g_shards[shard_idx(timer)];
+ gpr_mu_lock(&shard->mu);
+ if (!timer->triggered) {
+ grpc_exec_ctx_enqueue(exec_ctx, &timer->closure, false, NULL);
+ timer->triggered = 1;
+ if (timer->heap_index == INVALID_HEAP_INDEX) {
+ list_remove(timer);
+ } else {
+ grpc_timer_heap_remove(&shard->heap, timer);
+ }
+ }
+ gpr_mu_unlock(&shard->mu);
+}
+
+/* This is called when the queue is empty and "now" has reached the
+ queue_deadline_cap. We compute a new queue deadline and then scan the map
+ for timers that fall at or under it. Returns true if the queue is no
+ longer empty.
+ REQUIRES: shard->mu locked */
+static int refill_queue(shard_type *shard, gpr_timespec now) {
+ /* Compute the new queue window width and bound by the limits: */
+ double computed_deadline_delta =
+ grpc_time_averaged_stats_update_average(&shard->stats) *
+ ADD_DEADLINE_SCALE;
+ double deadline_delta =
+ GPR_CLAMP(computed_deadline_delta, MIN_QUEUE_WINDOW_DURATION,
+ MAX_QUEUE_WINDOW_DURATION);
+ grpc_timer *timer, *next;
+
+ /* Compute the new cap and put all timers under it into the queue: */
+ shard->queue_deadline_cap = gpr_time_add(
+ gpr_time_max(now, shard->queue_deadline_cap), dbl_to_ts(deadline_delta));
+ for (timer = shard->list.next; timer != &shard->list; timer = next) {
+ next = timer->next;
+
+ if (gpr_time_cmp(timer->deadline, shard->queue_deadline_cap) < 0) {
+ list_remove(timer);
+ grpc_timer_heap_add(&shard->heap, timer);
+ }
+ }
+ return !grpc_timer_heap_is_empty(&shard->heap);
+}
+
+/* This pops the next non-cancelled timer with deadline <= now from the queue,
+ or returns NULL if there isn't one.
+ REQUIRES: shard->mu locked */
+static grpc_timer *pop_one(shard_type *shard, gpr_timespec now) {
+ grpc_timer *timer;
+ for (;;) {
+ if (grpc_timer_heap_is_empty(&shard->heap)) {
+ if (gpr_time_cmp(now, shard->queue_deadline_cap) < 0) return NULL;
+ if (!refill_queue(shard, now)) return NULL;
+ }
+ timer = grpc_timer_heap_top(&shard->heap);
+ if (gpr_time_cmp(timer->deadline, now) > 0) return NULL;
+ timer->triggered = 1;
+ grpc_timer_heap_pop(&shard->heap);
+ return timer;
+ }
+}
+
+/* REQUIRES: shard->mu unlocked */
+static size_t pop_timers(grpc_exec_ctx *exec_ctx, shard_type *shard,
+ gpr_timespec now, gpr_timespec *new_min_deadline,
+ int success) {
+ size_t n = 0;
+ grpc_timer *timer;
+ gpr_mu_lock(&shard->mu);
+ while ((timer = pop_one(shard, now))) {
+ grpc_exec_ctx_enqueue(exec_ctx, &timer->closure, success, NULL);
+ n++;
+ }
+ *new_min_deadline = compute_min_deadline(shard);
+ gpr_mu_unlock(&shard->mu);
+ return n;
+}
+
+static int run_some_expired_timers(grpc_exec_ctx *exec_ctx, gpr_timespec now,
+ gpr_timespec *next, int success) {
+ size_t n = 0;
+
+ /* TODO(ctiller): verify that there are any timers (atomically) here */
+
+ if (gpr_mu_trylock(&g_checker_mu)) {
+ gpr_mu_lock(&g_mu);
+
+ while (gpr_time_cmp(g_shard_queue[0]->min_deadline, now) < 0) {
+ gpr_timespec new_min_deadline;
+
+ /* For efficiency, we pop as many available timers as we can from the
+ shard. This may violate perfect timer deadline ordering, but that
+ shouldn't be a big deal because we don't make ordering guarantees. */
+ n += pop_timers(exec_ctx, g_shard_queue[0], now, &new_min_deadline,
+ success);
+
+ /* An grpc_timer_init() on the shard could intervene here, adding a new
+ timer that is earlier than new_min_deadline. However,
+ grpc_timer_init() will block on the master_lock before it can call
+ set_min_deadline, so this one will complete first and then the Addtimer
+ will reduce the min_deadline (perhaps unnecessarily). */
+ g_shard_queue[0]->min_deadline = new_min_deadline;
+ note_deadline_change(g_shard_queue[0]);
+ }
+
+ if (next) {
+ *next = gpr_time_min(*next, g_shard_queue[0]->min_deadline);
+ }
+
+ gpr_mu_unlock(&g_mu);
+ gpr_mu_unlock(&g_checker_mu);
+ } else if (next != NULL) {
+ /* TODO(ctiller): this forces calling code to do an short poll, and
+ then retry the timer check (because this time through the timer list was
+ contended).
+
+ We could reduce the cost here dramatically by keeping a count of how many
+ currently active pollers got through the uncontended case above
+ successfully, and waking up other pollers IFF that count drops to zero.
+
+ Once that count is in place, this entire else branch could disappear. */
+ *next = gpr_time_min(
+ *next, gpr_time_add(now, gpr_time_from_millis(1, GPR_TIMESPAN)));
+ }
+
+ return (int)n;
+}
+
+bool grpc_timer_check(grpc_exec_ctx *exec_ctx, gpr_timespec now,
+ gpr_timespec *next) {
+ GPR_ASSERT(now.clock_type == g_clock_type);
+ return run_some_expired_timers(
+ exec_ctx, now, next,
+ gpr_time_cmp(now, gpr_inf_future(now.clock_type)) != 0);
+}
diff --git a/src/core/lib/iomgr/timer.h b/src/core/lib/iomgr/timer.h
new file mode 100644
index 0000000000..54f301c5ed
--- /dev/null
+++ b/src/core/lib/iomgr/timer.h
@@ -0,0 +1,108 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_TIMER_H
+#define GRPC_CORE_LIB_IOMGR_TIMER_H
+
+#include <grpc/support/port_platform.h>
+#include <grpc/support/time.h>
+#include "src/core/lib/iomgr/exec_ctx.h"
+#include "src/core/lib/iomgr/iomgr.h"
+
+typedef struct grpc_timer {
+ gpr_timespec deadline;
+ uint32_t heap_index; /* INVALID_HEAP_INDEX if not in heap */
+ int triggered;
+ struct grpc_timer *next;
+ struct grpc_timer *prev;
+ grpc_closure closure;
+} grpc_timer;
+
+/* Initialize *timer. When expired or canceled, timer_cb will be called with
+ *timer_cb_arg and status to indicate if it expired (SUCCESS) or was
+ canceled (CANCELLED). timer_cb is guaranteed to be called exactly once,
+ and application code should check the status to determine how it was
+ invoked. The application callback is also responsible for maintaining
+ information about when to free up any user-level state. */
+void grpc_timer_init(grpc_exec_ctx *exec_ctx, grpc_timer *timer,
+ gpr_timespec deadline, grpc_iomgr_cb_func timer_cb,
+ void *timer_cb_arg, gpr_timespec now);
+
+/* Note that there is no timer destroy function. This is because the
+ timer is a one-time occurrence with a guarantee that the callback will
+ be called exactly once, either at expiration or cancellation. Thus, all
+ the internal timer event management state is destroyed just before
+ that callback is invoked. If the user has additional state associated with
+ the timer, the user is responsible for determining when it is safe to
+ destroy that state. */
+
+/* Cancel an *timer.
+ There are three cases:
+ 1. We normally cancel the timer
+ 2. The timer has already run
+ 3. We can't cancel the timer because it is "in flight".
+
+ In all of these cases, the cancellation is still considered successful.
+ They are essentially distinguished in that the timer_cb will be run
+ exactly once from either the cancellation (with status CANCELLED)
+ or from the activation (with status SUCCESS)
+
+ Note carefully that the callback function MAY occur in the same callstack
+ as grpc_timer_cancel. It's expected that most timers will be cancelled (their
+ primary use is to implement deadlines), and so this code is optimized such
+ that cancellation costs as little as possible. Making callbacks run inline
+ matches this aim.
+
+ Requires: cancel() must happen after add() on a given timer */
+void grpc_timer_cancel(grpc_exec_ctx *exec_ctx, grpc_timer *timer);
+
+/* iomgr internal api for dealing with timers */
+
+/* Check for timers to be run, and run them.
+ Return true if timer callbacks were executed.
+ Drops drop_mu if it is non-null before executing callbacks.
+ If next is non-null, TRY to update *next with the next running timer
+ IF that timer occurs before *next current value.
+ *next is never guaranteed to be updated on any given execution; however,
+ with high probability at least one thread in the system will see an update
+ at any time slice. */
+bool grpc_timer_check(grpc_exec_ctx *exec_ctx, gpr_timespec now,
+ gpr_timespec *next);
+void grpc_timer_list_init(gpr_timespec now);
+void grpc_timer_list_shutdown(grpc_exec_ctx *exec_ctx);
+
+/* the following must be implemented by each iomgr implementation */
+
+void grpc_kick_poller(void);
+
+#endif /* GRPC_CORE_LIB_IOMGR_TIMER_H */
diff --git a/src/core/lib/iomgr/timer_heap.c b/src/core/lib/iomgr/timer_heap.c
new file mode 100644
index 0000000000..d43b6ccf75
--- /dev/null
+++ b/src/core/lib/iomgr/timer_heap.c
@@ -0,0 +1,146 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/iomgr/timer_heap.h"
+
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/useful.h>
+
+/* Adjusts a heap so as to move a hole at position i closer to the root,
+ until a suitable position is found for element t. Then, copies t into that
+ position. This functor is called each time immediately after modifying a
+ value in the underlying container, with the offset of the modified element as
+ its argument. */
+static void adjust_upwards(grpc_timer **first, uint32_t i, grpc_timer *t) {
+ while (i > 0) {
+ uint32_t parent = (uint32_t)(((int)i - 1) / 2);
+ if (gpr_time_cmp(first[parent]->deadline, t->deadline) <= 0) break;
+ first[i] = first[parent];
+ first[i]->heap_index = i;
+ i = parent;
+ }
+ first[i] = t;
+ t->heap_index = i;
+}
+
+/* Adjusts a heap so as to move a hole at position i farther away from the root,
+ until a suitable position is found for element t. Then, copies t into that
+ position. */
+static void adjust_downwards(grpc_timer **first, uint32_t i, uint32_t length,
+ grpc_timer *t) {
+ for (;;) {
+ uint32_t left_child = 1u + 2u * i;
+ if (left_child >= length) break;
+ uint32_t right_child = left_child + 1;
+ uint32_t next_i = right_child < length &&
+ gpr_time_cmp(first[left_child]->deadline,
+ first[right_child]->deadline) > 0
+ ? right_child
+ : left_child;
+ if (gpr_time_cmp(t->deadline, first[next_i]->deadline) <= 0) break;
+ first[i] = first[next_i];
+ first[i]->heap_index = i;
+ i = next_i;
+ }
+ first[i] = t;
+ t->heap_index = i;
+}
+
+#define SHRINK_MIN_ELEMS 8
+#define SHRINK_FULLNESS_FACTOR 2
+
+static void maybe_shrink(grpc_timer_heap *heap) {
+ if (heap->timer_count >= 8 &&
+ heap->timer_count <= heap->timer_capacity / SHRINK_FULLNESS_FACTOR / 2) {
+ heap->timer_capacity = heap->timer_count * SHRINK_FULLNESS_FACTOR;
+ heap->timers =
+ gpr_realloc(heap->timers, heap->timer_capacity * sizeof(grpc_timer *));
+ }
+}
+
+static void note_changed_priority(grpc_timer_heap *heap, grpc_timer *timer) {
+ uint32_t i = timer->heap_index;
+ uint32_t parent = (uint32_t)(((int)i - 1) / 2);
+ if (gpr_time_cmp(heap->timers[parent]->deadline, timer->deadline) > 0) {
+ adjust_upwards(heap->timers, i, timer);
+ } else {
+ adjust_downwards(heap->timers, i, heap->timer_count, timer);
+ }
+}
+
+void grpc_timer_heap_init(grpc_timer_heap *heap) {
+ memset(heap, 0, sizeof(*heap));
+}
+
+void grpc_timer_heap_destroy(grpc_timer_heap *heap) { gpr_free(heap->timers); }
+
+int grpc_timer_heap_add(grpc_timer_heap *heap, grpc_timer *timer) {
+ if (heap->timer_count == heap->timer_capacity) {
+ heap->timer_capacity =
+ GPR_MAX(heap->timer_capacity + 1, heap->timer_capacity * 3 / 2);
+ heap->timers =
+ gpr_realloc(heap->timers, heap->timer_capacity * sizeof(grpc_timer *));
+ }
+ timer->heap_index = heap->timer_count;
+ adjust_upwards(heap->timers, heap->timer_count, timer);
+ heap->timer_count++;
+ return timer->heap_index == 0;
+}
+
+void grpc_timer_heap_remove(grpc_timer_heap *heap, grpc_timer *timer) {
+ uint32_t i = timer->heap_index;
+ if (i == heap->timer_count - 1) {
+ heap->timer_count--;
+ maybe_shrink(heap);
+ return;
+ }
+ heap->timers[i] = heap->timers[heap->timer_count - 1];
+ heap->timers[i]->heap_index = i;
+ heap->timer_count--;
+ maybe_shrink(heap);
+ note_changed_priority(heap, heap->timers[i]);
+}
+
+int grpc_timer_heap_is_empty(grpc_timer_heap *heap) {
+ return heap->timer_count == 0;
+}
+
+grpc_timer *grpc_timer_heap_top(grpc_timer_heap *heap) {
+ return heap->timers[0];
+}
+
+void grpc_timer_heap_pop(grpc_timer_heap *heap) {
+ grpc_timer_heap_remove(heap, grpc_timer_heap_top(heap));
+}
diff --git a/src/core/lib/iomgr/timer_heap.h b/src/core/lib/iomgr/timer_heap.h
new file mode 100644
index 0000000000..d5112cf0de
--- /dev/null
+++ b/src/core/lib/iomgr/timer_heap.h
@@ -0,0 +1,57 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_TIMER_HEAP_H
+#define GRPC_CORE_LIB_IOMGR_TIMER_HEAP_H
+
+#include "src/core/lib/iomgr/timer.h"
+
+typedef struct {
+ grpc_timer **timers;
+ uint32_t timer_count;
+ uint32_t timer_capacity;
+} grpc_timer_heap;
+
+/* return 1 if the new timer is the first timer in the heap */
+int grpc_timer_heap_add(grpc_timer_heap *heap, grpc_timer *timer);
+
+void grpc_timer_heap_init(grpc_timer_heap *heap);
+void grpc_timer_heap_destroy(grpc_timer_heap *heap);
+
+void grpc_timer_heap_remove(grpc_timer_heap *heap, grpc_timer *timer);
+grpc_timer *grpc_timer_heap_top(grpc_timer_heap *heap);
+void grpc_timer_heap_pop(grpc_timer_heap *heap);
+
+int grpc_timer_heap_is_empty(grpc_timer_heap *heap);
+
+#endif /* GRPC_CORE_LIB_IOMGR_TIMER_HEAP_H */
diff --git a/src/core/lib/iomgr/udp_server.c b/src/core/lib/iomgr/udp_server.c
new file mode 100644
index 0000000000..9068109c3a
--- /dev/null
+++ b/src/core/lib/iomgr/udp_server.c
@@ -0,0 +1,411 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/* FIXME: "posix" files shouldn't be depending on _GNU_SOURCE */
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GRPC_NEED_UDP
+#ifdef GPR_POSIX_SOCKET
+
+#include "src/core/lib/iomgr/udp_server.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <grpc/grpc.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/time.h>
+#include "src/core/lib/iomgr/fd_posix.h"
+#include "src/core/lib/iomgr/pollset_posix.h"
+#include "src/core/lib/iomgr/resolve_address.h"
+#include "src/core/lib/iomgr/sockaddr_utils.h"
+#include "src/core/lib/iomgr/socket_utils_posix.h"
+#include "src/core/lib/iomgr/unix_sockets_posix.h"
+#include "src/core/lib/support/string.h"
+
+#define INIT_PORT_CAP 2
+
+/* one listening port */
+typedef struct {
+ int fd;
+ grpc_fd *emfd;
+ grpc_udp_server *server;
+ union {
+ uint8_t untyped[GRPC_MAX_SOCKADDR_SIZE];
+ struct sockaddr sockaddr;
+ } addr;
+ size_t addr_len;
+ grpc_closure read_closure;
+ grpc_closure destroyed_closure;
+ grpc_udp_server_read_cb read_cb;
+} server_port;
+
+/* the overall server */
+struct grpc_udp_server {
+ gpr_mu mu;
+ gpr_cv cv;
+
+ /* active port count: how many ports are actually still listening */
+ size_t active_ports;
+ /* destroyed port count: how many ports are completely destroyed */
+ size_t destroyed_ports;
+
+ /* is this server shutting down? (boolean) */
+ int shutdown;
+
+ /* all listening ports */
+ server_port *ports;
+ size_t nports;
+ size_t port_capacity;
+
+ /* shutdown callback */
+ grpc_closure *shutdown_complete;
+
+ /* all pollsets interested in new connections */
+ grpc_pollset **pollsets;
+ /* number of pollsets in the pollsets array */
+ size_t pollset_count;
+ /* The parent grpc server */
+ grpc_server *grpc_server;
+};
+
+grpc_udp_server *grpc_udp_server_create(void) {
+ grpc_udp_server *s = gpr_malloc(sizeof(grpc_udp_server));
+ gpr_mu_init(&s->mu);
+ gpr_cv_init(&s->cv);
+ s->active_ports = 0;
+ s->destroyed_ports = 0;
+ s->shutdown = 0;
+ s->ports = gpr_malloc(sizeof(server_port) * INIT_PORT_CAP);
+ s->nports = 0;
+ s->port_capacity = INIT_PORT_CAP;
+
+ return s;
+}
+
+static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_udp_server *s) {
+ grpc_exec_ctx_enqueue(exec_ctx, s->shutdown_complete, 1, NULL);
+
+ gpr_mu_destroy(&s->mu);
+ gpr_cv_destroy(&s->cv);
+
+ gpr_free(s->ports);
+ gpr_free(s);
+}
+
+static void destroyed_port(grpc_exec_ctx *exec_ctx, void *server,
+ bool success) {
+ grpc_udp_server *s = server;
+ gpr_mu_lock(&s->mu);
+ s->destroyed_ports++;
+ if (s->destroyed_ports == s->nports) {
+ gpr_mu_unlock(&s->mu);
+ finish_shutdown(exec_ctx, s);
+ } else {
+ gpr_mu_unlock(&s->mu);
+ }
+}
+
+/* called when all listening endpoints have been shutdown, so no further
+ events will be received on them - at this point it's safe to destroy
+ things */
+static void deactivated_all_ports(grpc_exec_ctx *exec_ctx, grpc_udp_server *s) {
+ size_t i;
+
+ /* delete ALL the things */
+ gpr_mu_lock(&s->mu);
+
+ if (!s->shutdown) {
+ gpr_mu_unlock(&s->mu);
+ return;
+ }
+
+ if (s->nports) {
+ for (i = 0; i < s->nports; i++) {
+ server_port *sp = &s->ports[i];
+ grpc_unlink_if_unix_domain_socket(&sp->addr.sockaddr);
+ sp->destroyed_closure.cb = destroyed_port;
+ sp->destroyed_closure.cb_arg = s;
+ grpc_fd_orphan(exec_ctx, sp->emfd, &sp->destroyed_closure, NULL,
+ "udp_listener_shutdown");
+ }
+ gpr_mu_unlock(&s->mu);
+ } else {
+ gpr_mu_unlock(&s->mu);
+ finish_shutdown(exec_ctx, s);
+ }
+}
+
+void grpc_udp_server_destroy(grpc_exec_ctx *exec_ctx, grpc_udp_server *s,
+ grpc_closure *on_done) {
+ size_t i;
+ gpr_mu_lock(&s->mu);
+
+ GPR_ASSERT(!s->shutdown);
+ s->shutdown = 1;
+
+ s->shutdown_complete = on_done;
+
+ /* shutdown all fd's */
+ if (s->active_ports) {
+ for (i = 0; i < s->nports; i++) {
+ grpc_fd_shutdown(exec_ctx, s->ports[i].emfd);
+ }
+ gpr_mu_unlock(&s->mu);
+ } else {
+ gpr_mu_unlock(&s->mu);
+ deactivated_all_ports(exec_ctx, s);
+ }
+}
+
+/* Prepare a recently-created socket for listening. */
+static int prepare_socket(int fd, const struct sockaddr *addr,
+ size_t addr_len) {
+ struct sockaddr_storage sockname_temp;
+ socklen_t sockname_len;
+
+ if (fd < 0) {
+ goto error;
+ }
+
+ if (!grpc_set_socket_nonblocking(fd, 1) || !grpc_set_socket_cloexec(fd, 1)) {
+ gpr_log(GPR_ERROR, "Unable to configure socket %d: %s", fd,
+ strerror(errno));
+ }
+
+ if (grpc_set_socket_ip_pktinfo_if_possible(fd) &&
+ addr->sa_family == AF_INET6) {
+ grpc_set_socket_ipv6_recvpktinfo_if_possible(fd);
+ }
+
+ GPR_ASSERT(addr_len < ~(socklen_t)0);
+ if (bind(fd, addr, (socklen_t)addr_len) < 0) {
+ char *addr_str;
+ grpc_sockaddr_to_string(&addr_str, addr, 0);
+ gpr_log(GPR_ERROR, "bind addr=%s: %s", addr_str, strerror(errno));
+ gpr_free(addr_str);
+ goto error;
+ }
+
+ sockname_len = sizeof(sockname_temp);
+ if (getsockname(fd, (struct sockaddr *)&sockname_temp, &sockname_len) < 0) {
+ goto error;
+ }
+
+ return grpc_sockaddr_get_port((struct sockaddr *)&sockname_temp);
+
+error:
+ if (fd >= 0) {
+ close(fd);
+ }
+ return -1;
+}
+
+/* event manager callback when reads are ready */
+static void on_read(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
+ server_port *sp = arg;
+
+ if (!success) {
+ gpr_mu_lock(&sp->server->mu);
+ if (0 == --sp->server->active_ports) {
+ gpr_mu_unlock(&sp->server->mu);
+ deactivated_all_ports(exec_ctx, sp->server);
+ } else {
+ gpr_mu_unlock(&sp->server->mu);
+ }
+ return;
+ }
+
+ /* Tell the registered callback that data is available to read. */
+ GPR_ASSERT(sp->read_cb);
+ sp->read_cb(exec_ctx, sp->emfd, sp->server->grpc_server);
+
+ /* Re-arm the notification event so we get another chance to read. */
+ grpc_fd_notify_on_read(exec_ctx, sp->emfd, &sp->read_closure);
+}
+
+static int add_socket_to_server(grpc_udp_server *s, int fd,
+ const struct sockaddr *addr, size_t addr_len,
+ grpc_udp_server_read_cb read_cb) {
+ server_port *sp;
+ int port;
+ char *addr_str;
+ char *name;
+
+ port = prepare_socket(fd, addr, addr_len);
+ if (port >= 0) {
+ grpc_sockaddr_to_string(&addr_str, (struct sockaddr *)&addr, 1);
+ gpr_asprintf(&name, "udp-server-listener:%s", addr_str);
+ gpr_free(addr_str);
+ gpr_mu_lock(&s->mu);
+ /* append it to the list under a lock */
+ if (s->nports == s->port_capacity) {
+ s->port_capacity *= 2;
+ s->ports = gpr_realloc(s->ports, sizeof(server_port) * s->port_capacity);
+ }
+ sp = &s->ports[s->nports++];
+ sp->server = s;
+ sp->fd = fd;
+ sp->emfd = grpc_fd_create(fd, name);
+ memcpy(sp->addr.untyped, addr, addr_len);
+ sp->addr_len = addr_len;
+ sp->read_cb = read_cb;
+ GPR_ASSERT(sp->emfd);
+ gpr_mu_unlock(&s->mu);
+ gpr_free(name);
+ }
+
+ return port;
+}
+
+int grpc_udp_server_add_port(grpc_udp_server *s, const void *addr,
+ size_t addr_len, grpc_udp_server_read_cb read_cb) {
+ int allocated_port1 = -1;
+ int allocated_port2 = -1;
+ unsigned i;
+ int fd;
+ grpc_dualstack_mode dsmode;
+ struct sockaddr_in6 addr6_v4mapped;
+ struct sockaddr_in wild4;
+ struct sockaddr_in6 wild6;
+ struct sockaddr_in addr4_copy;
+ struct sockaddr *allocated_addr = NULL;
+ struct sockaddr_storage sockname_temp;
+ socklen_t sockname_len;
+ int port;
+
+ grpc_unlink_if_unix_domain_socket((struct sockaddr *)addr);
+
+ /* Check if this is a wildcard port, and if so, try to keep the port the same
+ as some previously created listener. */
+ if (grpc_sockaddr_get_port(addr) == 0) {
+ for (i = 0; i < s->nports; i++) {
+ sockname_len = sizeof(sockname_temp);
+ if (0 == getsockname(s->ports[i].fd, (struct sockaddr *)&sockname_temp,
+ &sockname_len)) {
+ port = grpc_sockaddr_get_port((struct sockaddr *)&sockname_temp);
+ if (port > 0) {
+ allocated_addr = malloc(addr_len);
+ memcpy(allocated_addr, addr, addr_len);
+ grpc_sockaddr_set_port(allocated_addr, port);
+ addr = allocated_addr;
+ break;
+ }
+ }
+ }
+ }
+
+ if (grpc_sockaddr_to_v4mapped(addr, &addr6_v4mapped)) {
+ addr = (const struct sockaddr *)&addr6_v4mapped;
+ addr_len = sizeof(addr6_v4mapped);
+ }
+
+ /* Treat :: or 0.0.0.0 as a family-agnostic wildcard. */
+ if (grpc_sockaddr_is_wildcard(addr, &port)) {
+ grpc_sockaddr_make_wildcards(port, &wild4, &wild6);
+
+ /* Try listening on IPv6 first. */
+ addr = (struct sockaddr *)&wild6;
+ addr_len = sizeof(wild6);
+ fd = grpc_create_dualstack_socket(addr, SOCK_DGRAM, IPPROTO_UDP, &dsmode);
+ allocated_port1 = add_socket_to_server(s, fd, addr, addr_len, read_cb);
+ if (fd >= 0 && dsmode == GRPC_DSMODE_DUALSTACK) {
+ goto done;
+ }
+
+ /* If we didn't get a dualstack socket, also listen on 0.0.0.0. */
+ if (port == 0 && allocated_port1 > 0) {
+ grpc_sockaddr_set_port((struct sockaddr *)&wild4, allocated_port1);
+ }
+ addr = (struct sockaddr *)&wild4;
+ addr_len = sizeof(wild4);
+ }
+
+ fd = grpc_create_dualstack_socket(addr, SOCK_DGRAM, IPPROTO_UDP, &dsmode);
+ if (fd < 0) {
+ gpr_log(GPR_ERROR, "Unable to create socket: %s", strerror(errno));
+ }
+ if (dsmode == GRPC_DSMODE_IPV4 &&
+ grpc_sockaddr_is_v4mapped(addr, &addr4_copy)) {
+ addr = (struct sockaddr *)&addr4_copy;
+ addr_len = sizeof(addr4_copy);
+ }
+ allocated_port2 = add_socket_to_server(s, fd, addr, addr_len, read_cb);
+
+done:
+ gpr_free(allocated_addr);
+ return allocated_port1 >= 0 ? allocated_port1 : allocated_port2;
+}
+
+int grpc_udp_server_get_fd(grpc_udp_server *s, unsigned port_index) {
+ return (port_index < s->nports) ? s->ports[port_index].fd : -1;
+}
+
+void grpc_udp_server_start(grpc_exec_ctx *exec_ctx, grpc_udp_server *s,
+ grpc_pollset **pollsets, size_t pollset_count,
+ grpc_server *server) {
+ size_t i, j;
+ gpr_mu_lock(&s->mu);
+ GPR_ASSERT(s->active_ports == 0);
+ s->pollsets = pollsets;
+ s->grpc_server = server;
+ for (i = 0; i < s->nports; i++) {
+ for (j = 0; j < pollset_count; j++) {
+ grpc_pollset_add_fd(exec_ctx, pollsets[j], s->ports[i].emfd);
+ }
+ s->ports[i].read_closure.cb = on_read;
+ s->ports[i].read_closure.cb_arg = &s->ports[i];
+ grpc_fd_notify_on_read(exec_ctx, s->ports[i].emfd,
+ &s->ports[i].read_closure);
+ s->active_ports++;
+ }
+ gpr_mu_unlock(&s->mu);
+}
+
+#endif
+#endif
diff --git a/src/core/lib/iomgr/udp_server.h b/src/core/lib/iomgr/udp_server.h
new file mode 100644
index 0000000000..316845ad66
--- /dev/null
+++ b/src/core/lib/iomgr/udp_server.h
@@ -0,0 +1,77 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_UDP_SERVER_H
+#define GRPC_CORE_LIB_IOMGR_UDP_SERVER_H
+
+#include "src/core/lib/iomgr/endpoint.h"
+#include "src/core/lib/iomgr/fd_posix.h"
+
+/* Forward decl of struct grpc_server */
+/* This is not typedef'ed to avoid a typedef-redefinition error */
+struct grpc_server;
+
+/* Forward decl of grpc_udp_server */
+typedef struct grpc_udp_server grpc_udp_server;
+
+/* Called when data is available to read from the socket. */
+typedef void (*grpc_udp_server_read_cb)(grpc_exec_ctx *exec_ctx, grpc_fd *emfd,
+ struct grpc_server *server);
+
+/* Create a server, initially not bound to any ports */
+grpc_udp_server *grpc_udp_server_create(void);
+
+/* Start listening to bound ports */
+void grpc_udp_server_start(grpc_exec_ctx *exec_ctx, grpc_udp_server *udp_server,
+ grpc_pollset **pollsets, size_t pollset_count,
+ struct grpc_server *server);
+
+int grpc_udp_server_get_fd(grpc_udp_server *s, unsigned index);
+
+/* Add a port to the server, returning port number on success, or negative
+ on failure.
+
+ The :: and 0.0.0.0 wildcard addresses are treated identically, accepting
+ both IPv4 and IPv6 connections, but :: is the preferred style. This usually
+ creates one socket, but possibly two on systems which support IPv6,
+ but not dualstack sockets. */
+
+/* TODO(ctiller): deprecate this, and make grpc_udp_server_add_ports to handle
+ all of the multiple socket port matching logic in one place */
+int grpc_udp_server_add_port(grpc_udp_server *s, const void *addr,
+ size_t addr_len, grpc_udp_server_read_cb read_cb);
+
+void grpc_udp_server_destroy(grpc_exec_ctx *exec_ctx, grpc_udp_server *server,
+ grpc_closure *on_done);
+
+#endif /* GRPC_CORE_LIB_IOMGR_UDP_SERVER_H */
diff --git a/src/core/lib/iomgr/unix_sockets_posix.c b/src/core/lib/iomgr/unix_sockets_posix.c
new file mode 100644
index 0000000000..42e44989e0
--- /dev/null
+++ b/src/core/lib/iomgr/unix_sockets_posix.c
@@ -0,0 +1,103 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/iomgr/unix_sockets_posix.h"
+
+#ifdef GPR_HAVE_UNIX_SOCKET
+
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/un.h>
+
+#include <grpc/support/alloc.h>
+
+void grpc_create_socketpair_if_unix(int sv[2]) {
+ GPR_ASSERT(socketpair(AF_UNIX, SOCK_STREAM, 0, sv) == 0);
+}
+
+grpc_resolved_addresses *grpc_resolve_unix_domain_address(const char *name) {
+ struct sockaddr_un *un;
+
+ grpc_resolved_addresses *addrs = gpr_malloc(sizeof(grpc_resolved_addresses));
+ addrs->naddrs = 1;
+ addrs->addrs = gpr_malloc(sizeof(grpc_resolved_address));
+ un = (struct sockaddr_un *)addrs->addrs->addr;
+ un->sun_family = AF_UNIX;
+ strcpy(un->sun_path, name);
+ addrs->addrs->len = strlen(un->sun_path) + sizeof(un->sun_family) + 1;
+ return addrs;
+}
+
+int grpc_is_unix_socket(const struct sockaddr *addr) {
+ return addr->sa_family == AF_UNIX;
+}
+
+void grpc_unlink_if_unix_domain_socket(const struct sockaddr *addr) {
+ if (addr->sa_family != AF_UNIX) {
+ return;
+ }
+ struct sockaddr_un *un = (struct sockaddr_un *)addr;
+ struct stat st;
+
+ if (stat(un->sun_path, &st) == 0 && (st.st_mode & S_IFMT) == S_IFSOCK) {
+ unlink(un->sun_path);
+ }
+}
+
+int grpc_parse_unix(grpc_uri *uri, struct sockaddr_storage *addr, size_t *len) {
+ struct sockaddr_un *un = (struct sockaddr_un *)addr;
+
+ un->sun_family = AF_UNIX;
+ strcpy(un->sun_path, uri->path);
+ *len = strlen(un->sun_path) + sizeof(un->sun_family) + 1;
+
+ return 1;
+}
+
+char *grpc_unix_get_default_authority(grpc_resolver_factory *factory,
+ grpc_uri *uri) {
+ return gpr_strdup("localhost");
+}
+
+char *grpc_sockaddr_to_uri_unix_if_possible(const struct sockaddr *addr) {
+ if (addr->sa_family != AF_UNIX) {
+ return NULL;
+ }
+
+ char *result;
+ gpr_asprintf(&result, "unix:%s", ((struct sockaddr_un *)addr)->sun_path);
+ return result;
+}
+
+#endif
diff --git a/src/core/lib/iomgr/unix_sockets_posix.h b/src/core/lib/iomgr/unix_sockets_posix.h
new file mode 100644
index 0000000000..752cab85a5
--- /dev/null
+++ b/src/core/lib/iomgr/unix_sockets_posix.h
@@ -0,0 +1,61 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_UNIX_SOCKETS_POSIX_H
+#define GRPC_CORE_LIB_IOMGR_UNIX_SOCKETS_POSIX_H
+
+#include <grpc/support/port_platform.h>
+
+#include <grpc/support/string_util.h>
+
+#include "src/core/lib/client_config/resolver_factory.h"
+#include "src/core/lib/client_config/uri_parser.h"
+#include "src/core/lib/iomgr/resolve_address.h"
+#include "src/core/lib/iomgr/sockaddr.h"
+
+void grpc_create_socketpair_if_unix(int sv[2]);
+
+grpc_resolved_addresses *grpc_resolve_unix_domain_address(const char *name);
+
+int grpc_is_unix_socket(const struct sockaddr *addr);
+
+void grpc_unlink_if_unix_domain_socket(const struct sockaddr *addr);
+
+int grpc_parse_unix(grpc_uri *uri, struct sockaddr_storage *addr, size_t *len);
+
+char *grpc_unix_get_default_authority(grpc_resolver_factory *factory,
+ grpc_uri *uri);
+
+char *grpc_sockaddr_to_uri_unix_if_possible(const struct sockaddr *addr);
+
+#endif /* GRPC_CORE_LIB_IOMGR_UNIX_SOCKETS_POSIX_H */
diff --git a/src/core/lib/iomgr/unix_sockets_posix_noop.c b/src/core/lib/iomgr/unix_sockets_posix_noop.c
new file mode 100644
index 0000000000..06f6ee05e7
--- /dev/null
+++ b/src/core/lib/iomgr/unix_sockets_posix_noop.c
@@ -0,0 +1,61 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/iomgr/unix_sockets_posix.h"
+
+#ifndef GPR_HAVE_UNIX_SOCKET
+
+void grpc_create_socketpair_if_unix(int sv[2]) {}
+
+grpc_resolved_addresses *grpc_resolve_unix_domain_address(const char *name) {
+ return NULL;
+}
+
+int grpc_is_unix_socket(const struct sockaddr *addr) { return false; }
+
+void grpc_unlink_if_unix_domain_socket(const struct sockaddr *addr) {}
+
+int grpc_parse_unix(grpc_uri *uri, struct sockaddr_storage *addr, size_t *len) {
+ return 0;
+}
+
+char *grpc_unix_get_default_authority(grpc_resolver_factory *factory,
+ grpc_uri *uri) {
+ return NULL;
+}
+
+char *grpc_sockaddr_to_uri_unix_if_possible(const struct sockaddr *addr) {
+ return NULL;
+}
+
+#endif
diff --git a/src/core/lib/iomgr/wakeup_fd_eventfd.c b/src/core/lib/iomgr/wakeup_fd_eventfd.c
new file mode 100644
index 0000000000..41ded0ca4d
--- /dev/null
+++ b/src/core/lib/iomgr/wakeup_fd_eventfd.c
@@ -0,0 +1,85 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_LINUX_EVENTFD
+
+#include <errno.h>
+#include <sys/eventfd.h>
+#include <unistd.h>
+
+#include <grpc/support/log.h>
+
+#include "src/core/lib/iomgr/wakeup_fd_posix.h"
+#include "src/core/lib/profiling/timers.h"
+
+static void eventfd_create(grpc_wakeup_fd* fd_info) {
+ int efd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
+ /* TODO(klempner): Handle failure more gracefully */
+ GPR_ASSERT(efd >= 0);
+ fd_info->read_fd = efd;
+ fd_info->write_fd = -1;
+}
+
+static void eventfd_consume(grpc_wakeup_fd* fd_info) {
+ eventfd_t value;
+ int err;
+ do {
+ err = eventfd_read(fd_info->read_fd, &value);
+ } while (err < 0 && errno == EINTR);
+}
+
+static void eventfd_wakeup(grpc_wakeup_fd* fd_info) {
+ int err;
+ GPR_TIMER_BEGIN("eventfd_wakeup", 0);
+ do {
+ err = eventfd_write(fd_info->read_fd, 1);
+ } while (err < 0 && errno == EINTR);
+ GPR_TIMER_END("eventfd_wakeup", 0);
+}
+
+static void eventfd_destroy(grpc_wakeup_fd* fd_info) {
+ if (fd_info->read_fd != 0) close(fd_info->read_fd);
+}
+
+static int eventfd_check_availability(void) {
+ /* TODO(klempner): Actually check if eventfd is available */
+ return 1;
+}
+
+const grpc_wakeup_fd_vtable grpc_specialized_wakeup_fd_vtable = {
+ eventfd_create, eventfd_consume, eventfd_wakeup, eventfd_destroy,
+ eventfd_check_availability};
+
+#endif /* GPR_LINUX_EVENTFD */
diff --git a/src/core/lib/iomgr/wakeup_fd_nospecial.c b/src/core/lib/iomgr/wakeup_fd_nospecial.c
new file mode 100644
index 0000000000..39defa65c6
--- /dev/null
+++ b/src/core/lib/iomgr/wakeup_fd_nospecial.c
@@ -0,0 +1,51 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/*
+ * This is a dummy file to provide an invalid specialized_wakeup_fd_vtable on
+ * systems without anything better than pipe.
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_POSIX_NO_SPECIAL_WAKEUP_FD
+
+#include <stddef.h>
+#include "src/core/lib/iomgr/wakeup_fd_posix.h"
+
+static int check_availability_invalid(void) { return 0; }
+
+const grpc_wakeup_fd_vtable grpc_specialized_wakeup_fd_vtable = {
+ NULL, NULL, NULL, NULL, check_availability_invalid};
+
+#endif /* GPR_POSIX_NO_SPECIAL_WAKEUP_FD */
diff --git a/src/core/lib/iomgr/wakeup_fd_pipe.c b/src/core/lib/iomgr/wakeup_fd_pipe.c
new file mode 100644
index 0000000000..820919e4dd
--- /dev/null
+++ b/src/core/lib/iomgr/wakeup_fd_pipe.c
@@ -0,0 +1,102 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_POSIX_WAKEUP_FD
+
+#include "src/core/lib/iomgr/wakeup_fd_posix.h"
+
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <grpc/support/log.h>
+
+#include "src/core/lib/iomgr/socket_utils_posix.h"
+
+static void pipe_init(grpc_wakeup_fd* fd_info) {
+ int pipefd[2];
+ /* TODO(klempner): Make this nonfatal */
+ int r = pipe(pipefd);
+ if (0 != r) {
+ gpr_log(GPR_ERROR, "pipe creation failed (%d): %s", errno, strerror(errno));
+ abort();
+ }
+ GPR_ASSERT(grpc_set_socket_nonblocking(pipefd[0], 1));
+ GPR_ASSERT(grpc_set_socket_nonblocking(pipefd[1], 1));
+ fd_info->read_fd = pipefd[0];
+ fd_info->write_fd = pipefd[1];
+}
+
+static void pipe_consume(grpc_wakeup_fd* fd_info) {
+ char buf[128];
+ ssize_t r;
+
+ for (;;) {
+ r = read(fd_info->read_fd, buf, sizeof(buf));
+ if (r > 0) continue;
+ if (r == 0) return;
+ switch (errno) {
+ case EAGAIN:
+ return;
+ case EINTR:
+ continue;
+ default:
+ gpr_log(GPR_ERROR, "error reading pipe: %s", strerror(errno));
+ return;
+ }
+ }
+}
+
+static void pipe_wakeup(grpc_wakeup_fd* fd_info) {
+ char c = 0;
+ while (write(fd_info->write_fd, &c, 1) != 1 && errno == EINTR)
+ ;
+}
+
+static void pipe_destroy(grpc_wakeup_fd* fd_info) {
+ if (fd_info->read_fd != 0) close(fd_info->read_fd);
+ if (fd_info->write_fd != 0) close(fd_info->write_fd);
+}
+
+static int pipe_check_availability(void) {
+ /* Assume that pipes are always available. */
+ return 1;
+}
+
+const grpc_wakeup_fd_vtable grpc_pipe_wakeup_fd_vtable = {
+ pipe_init, pipe_consume, pipe_wakeup, pipe_destroy,
+ pipe_check_availability};
+
+#endif /* GPR_POSIX_WAKUP_FD */
diff --git a/src/core/lib/iomgr/wakeup_fd_pipe.h b/src/core/lib/iomgr/wakeup_fd_pipe.h
new file mode 100644
index 0000000000..bbdb1fc448
--- /dev/null
+++ b/src/core/lib/iomgr/wakeup_fd_pipe.h
@@ -0,0 +1,41 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_WAKEUP_FD_PIPE_H
+#define GRPC_CORE_LIB_IOMGR_WAKEUP_FD_PIPE_H
+
+#include "src/core/lib/iomgr/wakeup_fd_posix.h"
+
+extern grpc_wakeup_fd_vtable grpc_pipe_wakeup_fd_vtable;
+
+#endif /* GRPC_CORE_LIB_IOMGR_WAKEUP_FD_PIPE_H */
diff --git a/src/core/lib/iomgr/wakeup_fd_posix.c b/src/core/lib/iomgr/wakeup_fd_posix.c
new file mode 100644
index 0000000000..c4d174fb34
--- /dev/null
+++ b/src/core/lib/iomgr/wakeup_fd_posix.c
@@ -0,0 +1,72 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_POSIX_WAKEUP_FD
+
+#include <stddef.h>
+#include "src/core/lib/iomgr/wakeup_fd_pipe.h"
+#include "src/core/lib/iomgr/wakeup_fd_posix.h"
+
+static const grpc_wakeup_fd_vtable *wakeup_fd_vtable = NULL;
+int grpc_allow_specialized_wakeup_fd = 1;
+
+void grpc_wakeup_fd_global_init(void) {
+ if (grpc_allow_specialized_wakeup_fd &&
+ grpc_specialized_wakeup_fd_vtable.check_availability()) {
+ wakeup_fd_vtable = &grpc_specialized_wakeup_fd_vtable;
+ } else {
+ wakeup_fd_vtable = &grpc_pipe_wakeup_fd_vtable;
+ }
+}
+
+void grpc_wakeup_fd_global_destroy(void) { wakeup_fd_vtable = NULL; }
+
+void grpc_wakeup_fd_init(grpc_wakeup_fd *fd_info) {
+ wakeup_fd_vtable->init(fd_info);
+}
+
+void grpc_wakeup_fd_consume_wakeup(grpc_wakeup_fd *fd_info) {
+ wakeup_fd_vtable->consume(fd_info);
+}
+
+void grpc_wakeup_fd_wakeup(grpc_wakeup_fd *fd_info) {
+ wakeup_fd_vtable->wakeup(fd_info);
+}
+
+void grpc_wakeup_fd_destroy(grpc_wakeup_fd *fd_info) {
+ wakeup_fd_vtable->destroy(fd_info);
+}
+
+#endif /* GPR_POSIX_WAKEUP_FD */
diff --git a/src/core/lib/iomgr/wakeup_fd_posix.h b/src/core/lib/iomgr/wakeup_fd_posix.h
new file mode 100644
index 0000000000..20988d5fd3
--- /dev/null
+++ b/src/core/lib/iomgr/wakeup_fd_posix.h
@@ -0,0 +1,101 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/*
+ * wakeup_fd abstracts the concept of a file descriptor for the purpose of
+ * waking up a thread in select()/poll()/epoll_wait()/etc.
+
+ * The poll() family of system calls provide a way for a thread to block until
+ * there is activity on one (or more) of a set of file descriptors. An
+ * application may wish to wake up this thread to do non file related work. The
+ * typical way to do this is to add a pipe to the set of file descriptors, then
+ * write to the pipe to wake up the thread in poll().
+ *
+ * Linux has a lighter weight eventfd specifically designed for this purpose.
+ * wakeup_fd abstracts the difference between the two.
+ *
+ * Setup:
+ * 1. Before calling anything, call global_init() at least once.
+ * 1. Call grpc_wakeup_fd_create() to get a wakeup_fd.
+ * 2. Add the result of GRPC_WAKEUP_FD_FD to the set of monitored file
+ * descriptors for the poll() style API you are using. Monitor the file
+ * descriptor for readability.
+ * 3. To tear down, call grpc_wakeup_fd_destroy(). This closes the underlying
+ * file descriptor.
+ *
+ * Usage:
+ * 1. To wake up a polling thread, call grpc_wakeup_fd_wakeup() on a wakeup_fd
+ * it is monitoring.
+ * 2. If the polling thread was awakened by a wakeup_fd event, call
+ * grpc_wakeup_fd_consume_wakeup() on it.
+ */
+#ifndef GRPC_CORE_LIB_IOMGR_WAKEUP_FD_POSIX_H
+#define GRPC_CORE_LIB_IOMGR_WAKEUP_FD_POSIX_H
+
+void grpc_wakeup_fd_global_init(void);
+void grpc_wakeup_fd_global_destroy(void);
+
+/* Force using the fallback implementation. This is intended for testing
+ * purposes only.*/
+void grpc_wakeup_fd_global_init_force_fallback(void);
+
+typedef struct grpc_wakeup_fd grpc_wakeup_fd;
+
+typedef struct grpc_wakeup_fd_vtable {
+ void (*init)(grpc_wakeup_fd* fd_info);
+ void (*consume)(grpc_wakeup_fd* fd_info);
+ void (*wakeup)(grpc_wakeup_fd* fd_info);
+ void (*destroy)(grpc_wakeup_fd* fd_info);
+ /* Must be called before calling any other functions */
+ int (*check_availability)(void);
+} grpc_wakeup_fd_vtable;
+
+struct grpc_wakeup_fd {
+ int read_fd;
+ int write_fd;
+};
+
+extern int grpc_allow_specialized_wakeup_fd;
+
+#define GRPC_WAKEUP_FD_GET_READ_FD(fd_info) ((fd_info)->read_fd)
+
+void grpc_wakeup_fd_init(grpc_wakeup_fd* fd_info);
+void grpc_wakeup_fd_consume_wakeup(grpc_wakeup_fd* fd_info);
+void grpc_wakeup_fd_wakeup(grpc_wakeup_fd* fd_info);
+void grpc_wakeup_fd_destroy(grpc_wakeup_fd* fd_info);
+
+/* Defined in some specialized implementation's .c file, or by
+ * wakeup_fd_nospecial.c if no such implementation exists. */
+extern const grpc_wakeup_fd_vtable grpc_specialized_wakeup_fd_vtable;
+
+#endif /* GRPC_CORE_LIB_IOMGR_WAKEUP_FD_POSIX_H */
diff --git a/src/core/lib/iomgr/workqueue.h b/src/core/lib/iomgr/workqueue.h
new file mode 100644
index 0000000000..9c420c57de
--- /dev/null
+++ b/src/core/lib/iomgr/workqueue.h
@@ -0,0 +1,83 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_WORKQUEUE_H
+#define GRPC_CORE_LIB_IOMGR_WORKQUEUE_H
+
+#include "src/core/lib/iomgr/closure.h"
+#include "src/core/lib/iomgr/exec_ctx.h"
+#include "src/core/lib/iomgr/iomgr.h"
+#include "src/core/lib/iomgr/pollset.h"
+
+#ifdef GPR_POSIX_SOCKET
+#include "src/core/lib/iomgr/workqueue_posix.h"
+#endif
+
+#ifdef GPR_WIN32
+#include "src/core/lib/iomgr/workqueue_windows.h"
+#endif
+
+/* grpc_workqueue is forward declared in exec_ctx.h */
+
+/** Create a work queue */
+grpc_workqueue *grpc_workqueue_create(grpc_exec_ctx *exec_ctx);
+
+void grpc_workqueue_flush(grpc_exec_ctx *exec_ctx, grpc_workqueue *workqueue);
+
+#define GRPC_WORKQUEUE_REFCOUNT_DEBUG
+#ifdef GRPC_WORKQUEUE_REFCOUNT_DEBUG
+#define GRPC_WORKQUEUE_REF(p, r) \
+ grpc_workqueue_ref((p), __FILE__, __LINE__, (r))
+#define GRPC_WORKQUEUE_UNREF(cl, p, r) \
+ grpc_workqueue_unref((cl), (p), __FILE__, __LINE__, (r))
+void grpc_workqueue_ref(grpc_workqueue *workqueue, const char *file, int line,
+ const char *reason);
+void grpc_workqueue_unref(grpc_exec_ctx *exec_ctx, grpc_workqueue *workqueue,
+ const char *file, int line, const char *reason);
+#else
+#define GRPC_WORKQUEUE_REF(p, r) grpc_workqueue_ref((p))
+#define GRPC_WORKQUEUE_UNREF(cl, p, r) grpc_workqueue_unref((cl), (p))
+void grpc_workqueue_ref(grpc_workqueue *workqueue);
+void grpc_workqueue_unref(grpc_exec_ctx *exec_ctx, grpc_workqueue *workqueue);
+#endif
+
+/** Bind this workqueue to a pollset */
+void grpc_workqueue_add_to_pollset(grpc_exec_ctx *exec_ctx,
+ grpc_workqueue *workqueue,
+ grpc_pollset *pollset);
+
+/** Add a work item to a workqueue */
+void grpc_workqueue_push(grpc_workqueue *workqueue, grpc_closure *closure,
+ int success);
+
+#endif /* GRPC_CORE_LIB_IOMGR_WORKQUEUE_H */
diff --git a/src/core/lib/iomgr/workqueue_posix.c b/src/core/lib/iomgr/workqueue_posix.c
new file mode 100644
index 0000000000..76830ef12d
--- /dev/null
+++ b/src/core/lib/iomgr/workqueue_posix.c
@@ -0,0 +1,144 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_POSIX_SOCKET
+
+#include "src/core/lib/iomgr/workqueue.h"
+
+#include <stdio.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/useful.h>
+
+#include "src/core/lib/iomgr/fd_posix.h"
+#include "src/core/lib/iomgr/pollset_posix.h"
+
+static void on_readable(grpc_exec_ctx *exec_ctx, void *arg, bool success);
+
+grpc_workqueue *grpc_workqueue_create(grpc_exec_ctx *exec_ctx) {
+ char name[32];
+ grpc_workqueue *workqueue = gpr_malloc(sizeof(grpc_workqueue));
+ gpr_ref_init(&workqueue->refs, 1);
+ gpr_mu_init(&workqueue->mu);
+ workqueue->closure_list.head = workqueue->closure_list.tail = NULL;
+ grpc_wakeup_fd_init(&workqueue->wakeup_fd);
+ sprintf(name, "workqueue:%p", (void *)workqueue);
+ workqueue->wakeup_read_fd =
+ grpc_fd_create(GRPC_WAKEUP_FD_GET_READ_FD(&workqueue->wakeup_fd), name);
+ grpc_closure_init(&workqueue->read_closure, on_readable, workqueue);
+ grpc_fd_notify_on_read(exec_ctx, workqueue->wakeup_read_fd,
+ &workqueue->read_closure);
+ return workqueue;
+}
+
+static void workqueue_destroy(grpc_exec_ctx *exec_ctx,
+ grpc_workqueue *workqueue) {
+ GPR_ASSERT(grpc_closure_list_empty(workqueue->closure_list));
+ grpc_fd_shutdown(exec_ctx, workqueue->wakeup_read_fd);
+}
+
+#ifdef GRPC_WORKQUEUE_REFCOUNT_DEBUG
+void grpc_workqueue_ref(grpc_workqueue *workqueue, const char *file, int line,
+ const char *reason) {
+ gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "WORKQUEUE:%p ref %d -> %d %s",
+ workqueue, (int)workqueue->refs.count, (int)workqueue->refs.count + 1,
+ reason);
+#else
+void grpc_workqueue_ref(grpc_workqueue *workqueue) {
+#endif
+ gpr_ref(&workqueue->refs);
+}
+
+#ifdef GRPC_WORKQUEUE_REFCOUNT_DEBUG
+void grpc_workqueue_unref(grpc_exec_ctx *exec_ctx, grpc_workqueue *workqueue,
+ const char *file, int line, const char *reason) {
+ gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "WORKQUEUE:%p unref %d -> %d %s",
+ workqueue, (int)workqueue->refs.count, (int)workqueue->refs.count - 1,
+ reason);
+#else
+void grpc_workqueue_unref(grpc_exec_ctx *exec_ctx, grpc_workqueue *workqueue) {
+#endif
+ if (gpr_unref(&workqueue->refs)) {
+ workqueue_destroy(exec_ctx, workqueue);
+ }
+}
+
+void grpc_workqueue_add_to_pollset(grpc_exec_ctx *exec_ctx,
+ grpc_workqueue *workqueue,
+ grpc_pollset *pollset) {
+ grpc_pollset_add_fd(exec_ctx, pollset, workqueue->wakeup_read_fd);
+}
+
+void grpc_workqueue_flush(grpc_exec_ctx *exec_ctx, grpc_workqueue *workqueue) {
+ gpr_mu_lock(&workqueue->mu);
+ if (grpc_closure_list_empty(workqueue->closure_list)) {
+ grpc_wakeup_fd_wakeup(&workqueue->wakeup_fd);
+ }
+ grpc_exec_ctx_enqueue_list(exec_ctx, &workqueue->closure_list, NULL);
+ gpr_mu_unlock(&workqueue->mu);
+}
+
+static void on_readable(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
+ grpc_workqueue *workqueue = arg;
+
+ if (!success) {
+ gpr_mu_destroy(&workqueue->mu);
+ /* HACK: let wakeup_fd code know that we stole the fd */
+ workqueue->wakeup_fd.read_fd = 0;
+ grpc_wakeup_fd_destroy(&workqueue->wakeup_fd);
+ grpc_fd_orphan(exec_ctx, workqueue->wakeup_read_fd, NULL, NULL, "destroy");
+ gpr_free(workqueue);
+ } else {
+ gpr_mu_lock(&workqueue->mu);
+ grpc_exec_ctx_enqueue_list(exec_ctx, &workqueue->closure_list, NULL);
+ grpc_wakeup_fd_consume_wakeup(&workqueue->wakeup_fd);
+ gpr_mu_unlock(&workqueue->mu);
+ grpc_fd_notify_on_read(exec_ctx, workqueue->wakeup_read_fd,
+ &workqueue->read_closure);
+ }
+}
+
+void grpc_workqueue_push(grpc_workqueue *workqueue, grpc_closure *closure,
+ int success) {
+ gpr_mu_lock(&workqueue->mu);
+ if (grpc_closure_list_empty(workqueue->closure_list)) {
+ grpc_wakeup_fd_wakeup(&workqueue->wakeup_fd);
+ }
+ grpc_closure_list_add(&workqueue->closure_list, closure, success);
+ gpr_mu_unlock(&workqueue->mu);
+}
+
+#endif /* GPR_POSIX_SOCKET */
diff --git a/src/core/lib/iomgr/workqueue_posix.h b/src/core/lib/iomgr/workqueue_posix.h
new file mode 100644
index 0000000000..956de8fb27
--- /dev/null
+++ b/src/core/lib/iomgr/workqueue_posix.h
@@ -0,0 +1,53 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_WORKQUEUE_POSIX_H
+#define GRPC_CORE_LIB_IOMGR_WORKQUEUE_POSIX_H
+
+#include "src/core/lib/iomgr/wakeup_fd_posix.h"
+
+struct grpc_fd;
+
+struct grpc_workqueue {
+ gpr_refcount refs;
+
+ gpr_mu mu;
+ grpc_closure_list closure_list;
+
+ grpc_wakeup_fd wakeup_fd;
+ struct grpc_fd *wakeup_read_fd;
+
+ grpc_closure read_closure;
+};
+
+#endif /* GRPC_CORE_LIB_IOMGR_WORKQUEUE_POSIX_H */
diff --git a/src/core/lib/iomgr/workqueue_windows.c b/src/core/lib/iomgr/workqueue_windows.c
new file mode 100644
index 0000000000..6697f93498
--- /dev/null
+++ b/src/core/lib/iomgr/workqueue_windows.c
@@ -0,0 +1,40 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_WIN32
+
+#include "src/core/lib/iomgr/workqueue.h"
+
+#endif /* GPR_WIN32 */
diff --git a/src/core/lib/iomgr/workqueue_windows.h b/src/core/lib/iomgr/workqueue_windows.h
new file mode 100644
index 0000000000..8e6980b6d9
--- /dev/null
+++ b/src/core/lib/iomgr/workqueue_windows.h
@@ -0,0 +1,37 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_WORKQUEUE_WINDOWS_H
+#define GRPC_CORE_LIB_IOMGR_WORKQUEUE_WINDOWS_H
+
+#endif /* GRPC_CORE_LIB_IOMGR_WORKQUEUE_WINDOWS_H */