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-rw-r--r--src/core/lib/iomgr/ev_posix.c244
1 files changed, 244 insertions, 0 deletions
diff --git a/src/core/lib/iomgr/ev_posix.c b/src/core/lib/iomgr/ev_posix.c
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+++ b/src/core/lib/iomgr/ev_posix.c
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+/*
+ *
+ * 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/ev_posix.h"
+
+#include <string.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/ev_poll_and_epoll_posix.h"
+#include "src/core/lib/iomgr/ev_poll_posix.h"
+#include "src/core/lib/support/env.h"
+
+/** 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 const grpc_event_engine_vtable *g_event_engine;
+
+typedef const grpc_event_engine_vtable *(*event_engine_factory_fn)(void);
+
+typedef struct {
+ const char *name;
+ event_engine_factory_fn factory;
+} event_engine_factory;
+
+static const event_engine_factory g_factories[] = {
+ {"poll", grpc_init_poll_posix}, {"legacy", grpc_init_poll_and_epoll_posix},
+};
+
+static void add(const char *beg, const char *end, char ***ss, size_t *ns) {
+ size_t n = *ns;
+ size_t np = n + 1;
+ char *s;
+ size_t len;
+ GPR_ASSERT(end >= beg);
+ len = (size_t)(end - beg);
+ s = gpr_malloc(len + 1);
+ memcpy(s, beg, len);
+ s[len] = 0;
+ *ss = gpr_realloc(*ss, sizeof(char **) * np);
+ (*ss)[n] = s;
+ *ns = np;
+}
+
+static void split(const char *s, char ***ss, size_t *ns) {
+ const char *c = strchr(s, ',');
+ if (c == NULL) {
+ add(s, s + strlen(s), ss, ns);
+ } else {
+ add(s, c, ss, ns);
+ split(c + 1, ss, ns);
+ }
+}
+
+static bool is(const char *want, const char *have) {
+ return 0 == strcmp(want, "all") || 0 == strcmp(want, have);
+}
+
+static void try_engine(const char *engine) {
+ for (size_t i = 0; i < GPR_ARRAY_SIZE(g_factories); i++) {
+ if (is(engine, g_factories[i].name)) {
+ if ((g_event_engine = g_factories[i].factory())) {
+ return;
+ }
+ }
+ }
+}
+
+void grpc_event_engine_init(void) {
+ char *s = gpr_getenv("GRPC_POLL_STRATEGY");
+ if (s == NULL) {
+ s = gpr_strdup("all");
+ }
+
+ char **strings = NULL;
+ size_t nstrings = 0;
+ split(s, &strings, &nstrings);
+
+ for (size_t i = 0; g_event_engine == NULL && i < nstrings; i++) {
+ try_engine(strings[i]);
+ }
+
+ for (size_t i = 0; i < nstrings; i++) {
+ gpr_free(strings[i]);
+ }
+ gpr_free(strings);
+ gpr_free(s);
+
+ if (g_event_engine == NULL) {
+ gpr_log(GPR_ERROR, "No event engine could be initialized");
+ abort();
+ }
+}
+
+void grpc_event_engine_shutdown(void) {
+ g_event_engine->shutdown_engine();
+ g_event_engine = NULL;
+}
+
+grpc_fd *grpc_fd_create(int fd, const char *name) {
+ return g_event_engine->fd_create(fd, name);
+}
+
+int grpc_fd_wrapped_fd(grpc_fd *fd) {
+ return g_event_engine->fd_wrapped_fd(fd);
+}
+
+void grpc_fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_closure *on_done,
+ int *release_fd, const char *reason) {
+ g_event_engine->fd_orphan(exec_ctx, fd, on_done, release_fd, reason);
+}
+
+void grpc_fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
+ g_event_engine->fd_shutdown(exec_ctx, fd);
+}
+
+void grpc_fd_notify_on_read(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+ grpc_closure *closure) {
+ g_event_engine->fd_notify_on_read(exec_ctx, fd, closure);
+}
+
+void grpc_fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+ grpc_closure *closure) {
+ g_event_engine->fd_notify_on_write(exec_ctx, fd, closure);
+}
+
+size_t grpc_pollset_size(void) { return g_event_engine->pollset_size; }
+
+void grpc_pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
+ g_event_engine->pollset_init(pollset, mu);
+}
+
+void grpc_pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+ grpc_closure *closure) {
+ g_event_engine->pollset_shutdown(exec_ctx, pollset, closure);
+}
+
+void grpc_pollset_reset(grpc_pollset *pollset) {
+ g_event_engine->pollset_reset(pollset);
+}
+
+void grpc_pollset_destroy(grpc_pollset *pollset) {
+ g_event_engine->pollset_destroy(pollset);
+}
+
+void grpc_pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+ grpc_pollset_worker **worker, gpr_timespec now,
+ gpr_timespec deadline) {
+ g_event_engine->pollset_work(exec_ctx, pollset, worker, now, deadline);
+}
+
+void grpc_pollset_kick(grpc_pollset *pollset,
+ grpc_pollset_worker *specific_worker) {
+ g_event_engine->pollset_kick(pollset, specific_worker);
+}
+
+void grpc_pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+ struct grpc_fd *fd) {
+ g_event_engine->pollset_add_fd(exec_ctx, pollset, fd);
+}
+
+grpc_pollset_set *grpc_pollset_set_create(void) {
+ return g_event_engine->pollset_set_create();
+}
+
+void grpc_pollset_set_destroy(grpc_pollset_set *pollset_set) {
+ g_event_engine->pollset_set_destroy(pollset_set);
+}
+
+void grpc_pollset_set_add_pollset(grpc_exec_ctx *exec_ctx,
+ grpc_pollset_set *pollset_set,
+ grpc_pollset *pollset) {
+ g_event_engine->pollset_set_add_pollset(exec_ctx, pollset_set, pollset);
+}
+
+void grpc_pollset_set_del_pollset(grpc_exec_ctx *exec_ctx,
+ grpc_pollset_set *pollset_set,
+ grpc_pollset *pollset) {
+ g_event_engine->pollset_set_del_pollset(exec_ctx, pollset_set, pollset);
+}
+
+void grpc_pollset_set_add_pollset_set(grpc_exec_ctx *exec_ctx,
+ grpc_pollset_set *bag,
+ grpc_pollset_set *item) {
+ g_event_engine->pollset_set_add_pollset_set(exec_ctx, bag, item);
+}
+
+void grpc_pollset_set_del_pollset_set(grpc_exec_ctx *exec_ctx,
+ grpc_pollset_set *bag,
+ grpc_pollset_set *item) {
+ g_event_engine->pollset_set_del_pollset_set(exec_ctx, bag, item);
+}
+
+void grpc_pollset_set_add_fd(grpc_exec_ctx *exec_ctx,
+ grpc_pollset_set *pollset_set, grpc_fd *fd) {
+ g_event_engine->pollset_set_add_fd(exec_ctx, pollset_set, fd);
+}
+
+void grpc_pollset_set_del_fd(grpc_exec_ctx *exec_ctx,
+ grpc_pollset_set *pollset_set, grpc_fd *fd) {
+ g_event_engine->pollset_set_del_fd(exec_ctx, pollset_set, fd);
+}
+
+void grpc_kick_poller(void) { g_event_engine->kick_poller(); }
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-15 01:33:39 +0000