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/**
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0.
*/
#include <aws/common/thread_scheduler.h>
#include <aws/common/clock.h>
#include <aws/common/condition_variable.h>
#include <aws/common/task_scheduler.h>
#include <aws/testing/aws_test_harness.h>
struct executed_task_data {
struct aws_task *task;
void *arg;
enum aws_task_status status;
};
static struct executed_task_data s_executed_tasks[16];
static struct aws_mutex s_test_mutex = AWS_MUTEX_INIT;
static struct aws_condition_variable s_test_c_var = AWS_CONDITION_VARIABLE_INIT;
static size_t s_executed_tasks_n;
/* Updates tl_executed_tasks and tl_executed_task_n when function is executed */
static void s_task_n_fn(struct aws_task *task, void *arg, enum aws_task_status status) {
AWS_LOGF_INFO(AWS_LS_COMMON_GENERAL, "Invoking task");
aws_mutex_lock(&s_test_mutex);
AWS_LOGF_INFO(AWS_LS_COMMON_GENERAL, "Mutex Acquired");
if (s_executed_tasks_n > AWS_ARRAY_SIZE(s_executed_tasks)) {
AWS_ASSERT(0);
}
struct executed_task_data *data = &s_executed_tasks[s_executed_tasks_n++];
data->task = task;
data->arg = arg;
data->status = status;
aws_mutex_unlock(&s_test_mutex);
AWS_LOGF_INFO(AWS_LS_COMMON_GENERAL, "Mutex Released, notifying");
aws_condition_variable_notify_one(&s_test_c_var);
}
static bool s_scheduled_tasks_ran_predicate(void *arg) {
size_t *waiting_for = arg;
return *waiting_for == s_executed_tasks_n;
}
static int s_test_scheduler_ordering(struct aws_allocator *allocator, void *ctx) {
(void)ctx;
aws_common_library_init(allocator);
s_executed_tasks_n = 0;
struct aws_thread_scheduler *thread_scheduler = aws_thread_scheduler_new(allocator, NULL);
ASSERT_NOT_NULL(thread_scheduler);
struct aws_task task2;
aws_task_init(&task2, s_task_n_fn, (void *)2, "scheduler_ordering_1");
/* schedule 250 ms in the future. */
uint64_t task2_timestamp = 0;
aws_high_res_clock_get_ticks(&task2_timestamp);
task2_timestamp += 250000000;
aws_thread_scheduler_schedule_future(thread_scheduler, &task2, task2_timestamp);
struct aws_task task1;
aws_task_init(&task1, s_task_n_fn, (void *)1, "scheduler_ordering_2");
/* schedule now. */
aws_thread_scheduler_schedule_now(thread_scheduler, &task1);
struct aws_task task3;
aws_task_init(&task3, s_task_n_fn, (void *)3, "scheduler_ordering_3");
/* schedule 500 ms in the future. */
uint64_t task3_timestamp = 0;
aws_high_res_clock_get_ticks(&task3_timestamp);
task3_timestamp += 500000000;
aws_thread_scheduler_schedule_future(thread_scheduler, &task3, task3_timestamp);
ASSERT_SUCCESS(aws_mutex_lock(&s_test_mutex));
size_t expected_runs = 2;
ASSERT_SUCCESS(aws_condition_variable_wait_pred(
&s_test_c_var, &s_test_mutex, s_scheduled_tasks_ran_predicate, &expected_runs));
ASSERT_UINT_EQUALS(2, s_executed_tasks_n);
struct executed_task_data *task_data = &s_executed_tasks[0];
ASSERT_PTR_EQUALS(&task1, task_data->task);
ASSERT_PTR_EQUALS(task1.arg, task_data->arg);
ASSERT_INT_EQUALS(AWS_TASK_STATUS_RUN_READY, task_data->status);
task_data = &s_executed_tasks[1];
ASSERT_PTR_EQUALS(&task2, task_data->task);
ASSERT_PTR_EQUALS(task2.arg, task_data->arg);
ASSERT_INT_EQUALS(AWS_TASK_STATUS_RUN_READY, task_data->status);
expected_runs = 3;
ASSERT_SUCCESS(aws_condition_variable_wait_pred(
&s_test_c_var, &s_test_mutex, s_scheduled_tasks_ran_predicate, &expected_runs));
ASSERT_SUCCESS(aws_mutex_unlock(&s_test_mutex));
/* run task 3 */
ASSERT_UINT_EQUALS(3, s_executed_tasks_n);
task_data = &s_executed_tasks[2];
ASSERT_PTR_EQUALS(&task3, task_data->task);
ASSERT_PTR_EQUALS(task3.arg, task_data->arg);
ASSERT_INT_EQUALS(AWS_TASK_STATUS_RUN_READY, task_data->status);
aws_thread_scheduler_release(thread_scheduler);
aws_common_library_clean_up();
return 0;
}
AWS_TEST_CASE(test_thread_scheduler_ordering, s_test_scheduler_ordering)
static int s_test_scheduler_happy_path_cancellation(struct aws_allocator *allocator, void *ctx) {
(void)ctx;
aws_common_library_init(allocator);
s_executed_tasks_n = 0;
struct aws_thread_scheduler *thread_scheduler = aws_thread_scheduler_new(allocator, NULL);
ASSERT_NOT_NULL(thread_scheduler);
struct aws_task task2;
aws_task_init(&task2, s_task_n_fn, (void *)2, "scheduler_ordering_1");
/* schedule 250 ms in the future. */
uint64_t task2_timestamp = 0;
aws_high_res_clock_get_ticks(&task2_timestamp);
task2_timestamp += 250000000;
aws_thread_scheduler_schedule_future(thread_scheduler, &task2, task2_timestamp);
struct aws_task task1;
aws_task_init(&task1, s_task_n_fn, (void *)1, "scheduler_ordering_2");
/* schedule now. */
aws_thread_scheduler_schedule_now(thread_scheduler, &task1);
struct aws_task task3;
aws_task_init(&task3, s_task_n_fn, (void *)3, "scheduler_ordering_3");
/* schedule 500 ms in the future. */
uint64_t task3_timestamp = 0;
aws_high_res_clock_get_ticks(&task3_timestamp);
task3_timestamp += 500000000;
aws_thread_scheduler_schedule_future(thread_scheduler, &task3, task3_timestamp);
ASSERT_SUCCESS(aws_mutex_lock(&s_test_mutex));
size_t expected_runs = 2;
ASSERT_SUCCESS(aws_condition_variable_wait_pred(
&s_test_c_var, &s_test_mutex, s_scheduled_tasks_ran_predicate, &expected_runs));
ASSERT_UINT_EQUALS(2, s_executed_tasks_n);
struct executed_task_data *task_data = &s_executed_tasks[0];
ASSERT_PTR_EQUALS(&task1, task_data->task);
ASSERT_PTR_EQUALS(task1.arg, task_data->arg);
ASSERT_INT_EQUALS(AWS_TASK_STATUS_RUN_READY, task_data->status);
task_data = &s_executed_tasks[1];
ASSERT_PTR_EQUALS(&task2, task_data->task);
ASSERT_PTR_EQUALS(task2.arg, task_data->arg);
ASSERT_INT_EQUALS(AWS_TASK_STATUS_RUN_READY, task_data->status);
aws_thread_scheduler_cancel_task(thread_scheduler, &task3);
expected_runs = 3;
ASSERT_SUCCESS(aws_condition_variable_wait_pred(
&s_test_c_var, &s_test_mutex, s_scheduled_tasks_ran_predicate, &expected_runs));
ASSERT_SUCCESS(aws_mutex_unlock(&s_test_mutex));
/* run task 3 */
ASSERT_UINT_EQUALS(3, s_executed_tasks_n);
task_data = &s_executed_tasks[2];
ASSERT_PTR_EQUALS(&task3, task_data->task);
ASSERT_PTR_EQUALS(task3.arg, task_data->arg);
ASSERT_INT_EQUALS(AWS_TASK_STATUS_CANCELED, task_data->status);
aws_thread_scheduler_release(thread_scheduler);
aws_common_library_clean_up();
return 0;
}
AWS_TEST_CASE(test_thread_scheduler_happy_path_cancellation, s_test_scheduler_happy_path_cancellation)
static struct aws_task s_cancel_task;
static void s_schedule_and_cancel_task(struct aws_task *task, void *arg, enum aws_task_status status) {
struct aws_thread_scheduler *scheduler = arg;
aws_task_init(&s_cancel_task, s_task_n_fn, (void *)2, "scheduler_ordering_2");
aws_thread_scheduler_schedule_now(scheduler, &s_cancel_task);
aws_thread_scheduler_cancel_task(scheduler, &s_cancel_task);
s_task_n_fn(task, arg, status);
}
/* schedule a task. Inside that task schedule and then immediately cancel it. This will exercise the pending to be
* scheduled code path. */
static int s_test_scheduler_cancellation_for_pending_scheduled_task(struct aws_allocator *allocator, void *ctx) {
(void)ctx;
aws_common_library_init(allocator);
s_executed_tasks_n = 0;
struct aws_thread_scheduler *thread_scheduler = aws_thread_scheduler_new(allocator, NULL);
ASSERT_NOT_NULL(thread_scheduler);
struct aws_task task1;
aws_task_init(&task1, s_schedule_and_cancel_task, thread_scheduler, "scheduler_ordering_1");
aws_thread_scheduler_schedule_now(thread_scheduler, &task1);
ASSERT_SUCCESS(aws_mutex_lock(&s_test_mutex));
size_t expected_runs = 2;
ASSERT_SUCCESS(aws_condition_variable_wait_pred(
&s_test_c_var, &s_test_mutex, s_scheduled_tasks_ran_predicate, &expected_runs));
ASSERT_SUCCESS(aws_mutex_unlock(&s_test_mutex));
ASSERT_UINT_EQUALS(2, s_executed_tasks_n);
struct executed_task_data *task_data = &s_executed_tasks[0];
ASSERT_PTR_EQUALS(&task1, task_data->task);
ASSERT_PTR_EQUALS(task1.arg, task_data->arg);
ASSERT_INT_EQUALS(AWS_TASK_STATUS_RUN_READY, task_data->status);
task_data = &s_executed_tasks[1];
ASSERT_PTR_EQUALS(&s_cancel_task, task_data->task);
ASSERT_INT_EQUALS(AWS_TASK_STATUS_CANCELED, task_data->status);
aws_thread_scheduler_release(thread_scheduler);
aws_common_library_clean_up();
return 0;
}
AWS_TEST_CASE(
test_scheduler_cancellation_for_pending_scheduled_task,
s_test_scheduler_cancellation_for_pending_scheduled_task)
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