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-rw-r--r--test/core/util/trickle_endpoint.c196
1 files changed, 196 insertions, 0 deletions
diff --git a/test/core/util/trickle_endpoint.c b/test/core/util/trickle_endpoint.c
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+++ b/test/core/util/trickle_endpoint.c
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+/*
+ *
+ * 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 "test/core/util/passthru_endpoint.h"
+
+#include <inttypes.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/sockaddr.h"
+
+#include "src/core/lib/slice/slice_internal.h"
+
+typedef struct {
+ grpc_endpoint base;
+ double bytes_per_second;
+ grpc_endpoint *wrapped;
+ gpr_timespec last_write;
+
+ gpr_mu mu;
+ grpc_slice_buffer write_buffer;
+ grpc_slice_buffer writing_buffer;
+ grpc_error *error;
+ bool writing;
+} trickle_endpoint;
+
+static void te_read(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
+ grpc_slice_buffer *slices, grpc_closure *cb) {
+ trickle_endpoint *te = (trickle_endpoint *)ep;
+ grpc_endpoint_read(exec_ctx, te->wrapped, slices, cb);
+}
+
+static void te_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
+ grpc_slice_buffer *slices, grpc_closure *cb) {
+ trickle_endpoint *te = (trickle_endpoint *)ep;
+ for (size_t i = 0; i < slices->count; i++) {
+ grpc_slice_ref_internal(slices->slices[i]);
+ }
+ gpr_mu_lock(&te->mu);
+ if (te->write_buffer.length == 0) {
+ te->last_write = gpr_now(GPR_CLOCK_MONOTONIC);
+ }
+ grpc_slice_buffer_addn(&te->write_buffer, slices->slices, slices->count);
+ grpc_closure_sched(exec_ctx, cb, GRPC_ERROR_REF(te->error));
+ gpr_mu_unlock(&te->mu);
+}
+
+static grpc_workqueue *te_get_workqueue(grpc_endpoint *ep) {
+ trickle_endpoint *te = (trickle_endpoint *)ep;
+ return grpc_endpoint_get_workqueue(te->wrapped);
+}
+
+static void te_add_to_pollset(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
+ grpc_pollset *pollset) {
+ trickle_endpoint *te = (trickle_endpoint *)ep;
+ grpc_endpoint_add_to_pollset(exec_ctx, te->wrapped, pollset);
+}
+
+static void te_add_to_pollset_set(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
+ grpc_pollset_set *pollset_set) {
+ trickle_endpoint *te = (trickle_endpoint *)ep;
+ grpc_endpoint_add_to_pollset_set(exec_ctx, te->wrapped, pollset_set);
+}
+
+static void te_shutdown(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
+ grpc_error *why) {
+ trickle_endpoint *te = (trickle_endpoint *)ep;
+ gpr_mu_lock(&te->mu);
+ if (te->error == GRPC_ERROR_NONE) {
+ te->error = GRPC_ERROR_REF(why);
+ }
+ gpr_mu_unlock(&te->mu);
+ grpc_endpoint_shutdown(exec_ctx, te->wrapped, why);
+}
+
+static void te_destroy(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep) {
+ trickle_endpoint *te = (trickle_endpoint *)ep;
+ grpc_endpoint_destroy(exec_ctx, te->wrapped);
+ gpr_mu_destroy(&te->mu);
+ grpc_slice_buffer_destroy_internal(exec_ctx, &te->write_buffer);
+ grpc_slice_buffer_destroy_internal(exec_ctx, &te->writing_buffer);
+ GRPC_ERROR_UNREF(te->error);
+ gpr_free(te);
+}
+
+static grpc_resource_user *te_get_resource_user(grpc_endpoint *ep) {
+ trickle_endpoint *te = (trickle_endpoint *)ep;
+ return grpc_endpoint_get_resource_user(te->wrapped);
+}
+
+static char *te_get_peer(grpc_endpoint *ep) {
+ trickle_endpoint *te = (trickle_endpoint *)ep;
+ return grpc_endpoint_get_peer(te->wrapped);
+}
+
+static int te_get_fd(grpc_endpoint *ep) {
+ trickle_endpoint *te = (trickle_endpoint *)ep;
+ return grpc_endpoint_get_fd(te->wrapped);
+}
+
+static void te_finish_write(grpc_exec_ctx *exec_ctx, void *arg,
+ grpc_error *error) {
+ trickle_endpoint *te = arg;
+ gpr_mu_lock(&te->mu);
+ te->writing = false;
+ grpc_slice_buffer_reset_and_unref(&te->writing_buffer);
+ gpr_mu_unlock(&te->mu);
+}
+
+static const grpc_endpoint_vtable vtable = {te_read,
+ te_write,
+ te_get_workqueue,
+ te_add_to_pollset,
+ te_add_to_pollset_set,
+ te_shutdown,
+ te_destroy,
+ te_get_resource_user,
+ te_get_peer,
+ te_get_fd};
+
+grpc_endpoint *grpc_trickle_endpoint_create(grpc_endpoint *wrap,
+ double bytes_per_second) {
+ trickle_endpoint *te = gpr_malloc(sizeof(*te));
+ te->base.vtable = &vtable;
+ te->wrapped = wrap;
+ te->bytes_per_second = bytes_per_second;
+ gpr_mu_init(&te->mu);
+ grpc_slice_buffer_init(&te->write_buffer);
+ grpc_slice_buffer_init(&te->writing_buffer);
+ te->error = GRPC_ERROR_NONE;
+ te->writing = false;
+ return &te->base;
+}
+
+static double ts2dbl(gpr_timespec s) {
+ return (double)s.tv_sec + 1e-9 * (double)s.tv_nsec;
+}
+
+size_t grpc_trickle_endpoint_trickle(grpc_exec_ctx *exec_ctx,
+ grpc_endpoint *ep) {
+ trickle_endpoint *te = (trickle_endpoint *)ep;
+ gpr_mu_lock(&te->mu);
+ if (!te->writing && te->write_buffer.length > 0) {
+ gpr_timespec now = gpr_now(GPR_CLOCK_MONOTONIC);
+ double elapsed = ts2dbl(gpr_time_sub(now, te->last_write));
+ size_t bytes = (size_t)(te->bytes_per_second * elapsed);
+ // gpr_log(GPR_DEBUG, "%lf elapsed --> %" PRIdPTR " bytes", elapsed, bytes);
+ if (bytes > 0) {
+ grpc_slice_buffer_move_first(&te->write_buffer,
+ GPR_MIN(bytes, te->write_buffer.length),
+ &te->writing_buffer);
+ te->writing = true;
+ te->last_write = now;
+ grpc_endpoint_write(
+ exec_ctx, te->wrapped, &te->writing_buffer,
+ grpc_closure_create(te_finish_write, te, grpc_schedule_on_exec_ctx));
+ }
+ }
+ size_t backlog = te->write_buffer.length;
+ gpr_mu_unlock(&te->mu);
+ return backlog;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-10 17:15:00 +0000