Add a task distribution test.

git-svn-id: https://origsvn.digium.com/svn/asterisk/team/mmichelson/threadpool@377418 65c4cc65-6c06-0410-ace0-fbb531ad65f3

tests/test_threadpool.c

@@ -703,6 +703,145 @@ end:
 
 }
 
+struct complex_task_data {
+	int task_executed;
+	int continue_task;
+	ast_mutex_t lock;
+	ast_cond_t stall_cond;
+	ast_cond_t done_cond;
+};
+
+static struct complex_task_data *complex_task_data_alloc(void)
+{
+	struct complex_task_data *ctd = ast_calloc(1, sizeof(*ctd));
+
+	if (!ctd) {
+		return NULL;
+	}
+	ast_mutex_init(&ctd->lock);
+	ast_cond_init(&ctd->stall_cond, NULL);
+	ast_cond_init(&ctd->done_cond, NULL);
+	return ctd;
+}
+
+static int complex_task(void *data)
+{
+	struct complex_task_data *ctd = data;
+	SCOPED_MUTEX(lock, &ctd->lock);
+	while (!ctd->continue_task) {
+		ast_cond_wait(&ctd->stall_cond, lock);
+	}
+	/* We got poked. Finish up */
+	ctd->task_executed = 1;
+	ast_cond_signal(&ctd->done_cond);
+	return 0;
+}
+
+static void poke_worker(struct complex_task_data *ctd)
+{
+	SCOPED_MUTEX(lock, &ctd->lock);
+	ctd->continue_task = 1;
+	ast_cond_signal(&ctd->stall_cond);
+}
+
+static enum ast_test_result_state wait_for_complex_completion(struct complex_task_data *ctd)
+{
+	struct timeval start = ast_tvnow();
+	struct timespec end = {
+		.tv_sec = start.tv_sec + 5,
+		.tv_nsec = start.tv_usec * 1000
+	};
+	enum ast_test_result_state res = AST_TEST_PASS;
+	SCOPED_MUTEX(lock, &ctd->lock);
+
+	while (!ctd->task_executed) {
+		ast_cond_timedwait(&ctd->done_cond, lock, &end);
+	}
+
+	if (!ctd->task_executed) {
+		res = AST_TEST_FAIL;
+	}
+	return res;
+}
+
+AST_TEST_DEFINE(threadpool_task_distribution)
+{
+	struct ast_threadpool *pool = NULL;
+	struct ast_threadpool_listener *listener = NULL;
+	struct complex_task_data *ctd1 = NULL;
+	struct complex_task_data *ctd2 = NULL;
+	enum ast_test_result_state res = AST_TEST_FAIL;
+	struct test_listener_data *tld;
+
+	switch (cmd) {
+	case TEST_INIT:
+		info->name = "threadpool_task_distribution";
+		info->category = "/main/threadpool/";
+		info->summary = "Test that tasks are evenly distributed to threads";
+		info->description =
+			"Push two tasks into a threadpool. Ensure that each is handled by\n"
+			"a separate thread\n";
+		return AST_TEST_NOT_RUN;
+	case TEST_EXECUTE:
+		break;
+	}
+
+	listener = ast_threadpool_listener_alloc(&test_callbacks);
+	if (!listener) {
+		return AST_TEST_FAIL;
+	}
+	tld = listener->private_data;
+
+	pool = ast_threadpool_create(listener, 0);
+	if (!pool) {
+		goto end;
+	}
+
+	ctd1 = complex_task_data_alloc();
+	ctd2 = complex_task_data_alloc();
+	if (!ctd1 || !ctd2) {
+		goto end;
+	}
+
+	ast_threadpool_push(pool, complex_task, ctd1);
+	ast_threadpool_push(pool, complex_task, ctd2);
+
+	ast_threadpool_set_size(pool, 2);
+
+	WAIT_WHILE(tld, tld->num_active < 2);
+
+	res = listener_check(test, listener, 1, 0, 2, 2, 0, 0);
+	if (res == AST_TEST_FAIL) {
+		goto end;
+	}
+
+	/* The tasks are stalled until we poke them */
+	poke_worker(ctd1);
+	poke_worker(ctd2);
+
+	res = wait_for_complex_completion(ctd1);
+	if (res == AST_TEST_FAIL) {
+		goto end;
+	}
+	res = wait_for_complex_completion(ctd2);
+	if (res == AST_TEST_FAIL) {
+		goto end;
+	}
+
+	WAIT_WHILE(tld, tld->num_idle < 2);
+
+	res = listener_check(test, listener, 1, 0, 2, 0, 2, 1);
+
+end:
+	if (pool) {
+		ast_threadpool_shutdown(pool);
+	}
+	ao2_cleanup(listener);
+	ast_free(ctd1);
+	ast_free(ctd2);
+	return res;
+}
+
 static int unload_module(void)
 {
 	ast_test_unregister(threadpool_push);
@@ -712,6 +851,7 @@ static int unload_module(void)
 	ast_test_unregister(threadpool_one_thread_one_task);
 	ast_test_unregister(threadpool_one_thread_multiple_tasks);
 	ast_test_unregister(threadpool_reactivation);
+	ast_test_unregister(threadpool_task_distribution);
 	return 0;
 }
 
@@ -724,6 +864,7 @@ static int load_module(void)
 	ast_test_register(threadpool_one_thread_one_task);
 	ast_test_register(threadpool_one_thread_multiple_tasks);
 	ast_test_register(threadpool_reactivation);
+	ast_test_register(threadpool_task_distribution);
 	return AST_MODULE_LOAD_SUCCESS;
 }