1 files changed, 168 insertions, 0 deletions
diff --git a/test/core/iomgr/combiner_test.cc b/test/core/iomgr/combiner_test.cc
new file mode 100644
index 0000000000..5a825368f7
--- /dev/null
+++ b/test/core/iomgr/combiner_test.cc
@@ -0,0 +1,168 @@
+/*
+ *
+ * Copyright 2015 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include "src/core/lib/iomgr/combiner.h"
+
+#include <grpc/grpc.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/thd.h>
+#include <grpc/support/useful.h>
+
+#include "test/core/util/test_config.h"
+
+static void test_no_op(void) {
+  gpr_log(GPR_DEBUG, "test_no_op");
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  GRPC_COMBINER_UNREF(&exec_ctx, grpc_combiner_create(), "test_no_op");
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+
+static void set_event_to_true(grpc_exec_ctx* exec_ctx, void* value,
+                              grpc_error* error) {
+  gpr_event_set(static_cast<gpr_event*>(value), (void*)1);
+}
+
+static void test_execute_one(void) {
+  gpr_log(GPR_DEBUG, "test_execute_one");
+
+  grpc_combiner* lock = grpc_combiner_create();
+  gpr_event done;
+  gpr_event_init(&done);
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  GRPC_CLOSURE_SCHED(&exec_ctx,
+                     GRPC_CLOSURE_CREATE(set_event_to_true, &done,
+                                         grpc_combiner_scheduler(lock)),
+                     GRPC_ERROR_NONE);
+  grpc_exec_ctx_flush(&exec_ctx);
+  GPR_ASSERT(gpr_event_wait(&done, grpc_timeout_seconds_to_deadline(5)) !=
+             NULL);
+  GRPC_COMBINER_UNREF(&exec_ctx, lock, "test_execute_one");
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+
+typedef struct {
+  size_t ctr;
+  grpc_combiner* lock;
+  gpr_event done;
+} thd_args;
+
+typedef struct {
+  size_t* ctr;
+  size_t value;
+} ex_args;
+
+static void check_one(grpc_exec_ctx* exec_ctx, void* a, grpc_error* error) {
+  ex_args* args = static_cast<ex_args*>(a);
+  GPR_ASSERT(*args->ctr == args->value - 1);
+  *args->ctr = args->value;
+  gpr_free(a);
+}
+
+static void execute_many_loop(void* a) {
+  thd_args* args = static_cast<thd_args*>(a);
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  size_t n = 1;
+  for (size_t i = 0; i < 10; i++) {
+    for (size_t j = 0; j < 10000; j++) {
+      ex_args* c = static_cast<ex_args*>(gpr_malloc(sizeof(*c)));
+      c->ctr = &args->ctr;
+      c->value = n++;
+      GRPC_CLOSURE_SCHED(&exec_ctx,
+                         GRPC_CLOSURE_CREATE(
+                             check_one, c, grpc_combiner_scheduler(args->lock)),
+                         GRPC_ERROR_NONE);
+      grpc_exec_ctx_flush(&exec_ctx);
+    }
+    // sleep for a little bit, to test a combiner draining and another thread
+    // picking it up
+    gpr_sleep_until(grpc_timeout_milliseconds_to_deadline(100));
+  }
+  GRPC_CLOSURE_SCHED(&exec_ctx,
+                     GRPC_CLOSURE_CREATE(set_event_to_true, &args->done,
+                                         grpc_combiner_scheduler(args->lock)),
+                     GRPC_ERROR_NONE);
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+
+static void test_execute_many(void) {
+  gpr_log(GPR_DEBUG, "test_execute_many");
+
+  grpc_combiner* lock = grpc_combiner_create();
+  gpr_thd_id thds[100];
+  thd_args ta[GPR_ARRAY_SIZE(thds)];
+  for (size_t i = 0; i < GPR_ARRAY_SIZE(thds); i++) {
+    gpr_thd_options options = gpr_thd_options_default();
+    gpr_thd_options_set_joinable(&options);
+    ta[i].ctr = 0;
+    ta[i].lock = lock;
+    gpr_event_init(&ta[i].done);
+    GPR_ASSERT(gpr_thd_new(&thds[i], execute_many_loop, &ta[i], &options));
+  }
+  for (size_t i = 0; i < GPR_ARRAY_SIZE(thds); i++) {
+    GPR_ASSERT(gpr_event_wait(&ta[i].done,
+                              gpr_inf_future(GPR_CLOCK_REALTIME)) != NULL);
+    gpr_thd_join(thds[i]);
+  }
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  GRPC_COMBINER_UNREF(&exec_ctx, lock, "test_execute_many");
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+
+static gpr_event got_in_finally;
+
+static void in_finally(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+  gpr_event_set(&got_in_finally, (void*)1);
+}
+
+static void add_finally(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+  GRPC_CLOSURE_SCHED(exec_ctx,
+                     GRPC_CLOSURE_CREATE(in_finally, arg,
+                                         grpc_combiner_finally_scheduler(
+                                             static_cast<grpc_combiner*>(arg))),
+                     GRPC_ERROR_NONE);
+}
+
+static void test_execute_finally(void) {
+  gpr_log(GPR_DEBUG, "test_execute_finally");
+
+  grpc_combiner* lock = grpc_combiner_create();
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  gpr_event_init(&got_in_finally);
+  GRPC_CLOSURE_SCHED(
+      &exec_ctx,
+      GRPC_CLOSURE_CREATE(add_finally, lock, grpc_combiner_scheduler(lock)),
+      GRPC_ERROR_NONE);
+  grpc_exec_ctx_flush(&exec_ctx);
+  GPR_ASSERT(gpr_event_wait(&got_in_finally,
+                            grpc_timeout_seconds_to_deadline(5)) != NULL);
+  GRPC_COMBINER_UNREF(&exec_ctx, lock, "test_execute_finally");
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+
+int main(int argc, char** argv) {
+  grpc_test_init(argc, argv);
+  grpc_init();
+  test_no_op();
+  test_execute_one();
+  test_execute_finally();
+  test_execute_many();
+  grpc_shutdown();
+
+  return 0;
+}