| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "base/task_scheduler/scheduler_worker_pool_impl.h" |
| |
| #include <stddef.h> |
| |
| #include <memory> |
| #include <unordered_set> |
| #include <vector> |
| |
| #include "base/atomicops.h" |
| #include "base/bind.h" |
| #include "base/bind_helpers.h" |
| #include "base/callback.h" |
| #include "base/macros.h" |
| #include "base/memory/ptr_util.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/synchronization/condition_variable.h" |
| #include "base/synchronization/lock.h" |
| #include "base/synchronization/waitable_event.h" |
| #include "base/task_runner.h" |
| #include "base/task_scheduler/delayed_task_manager.h" |
| #include "base/task_scheduler/scheduler_worker_pool_params.h" |
| #include "base/task_scheduler/sequence.h" |
| #include "base/task_scheduler/sequence_sort_key.h" |
| #include "base/task_scheduler/task_tracker.h" |
| #include "base/task_scheduler/test_task_factory.h" |
| #include "base/test/gtest_util.h" |
| #include "base/threading/platform_thread.h" |
| #include "base/threading/simple_thread.h" |
| #include "base/threading/thread_checker_impl.h" |
| #include "base/threading/thread_local_storage.h" |
| #include "base/threading/thread_restrictions.h" |
| #include "base/time/time.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| namespace base { |
| namespace internal { |
| namespace { |
| |
| const size_t kNumWorkersInWorkerPool = 4; |
| const size_t kNumThreadsPostingTasks = 4; |
| const size_t kNumTasksPostedPerThread = 150; |
| constexpr TimeDelta kReclaimTimeForDetachTests = |
| TimeDelta::FromMilliseconds(10); |
| |
| using IORestriction = SchedulerWorkerPoolParams::IORestriction; |
| |
| class TestDelayedTaskManager : public DelayedTaskManager { |
| public: |
| TestDelayedTaskManager() : DelayedTaskManager(Bind(&DoNothing)) {} |
| |
| void SetCurrentTime(TimeTicks now) { now_ = now; } |
| |
| // DelayedTaskManager: |
| TimeTicks Now() const override { return now_; } |
| |
| private: |
| TimeTicks now_ = TimeTicks::Now(); |
| |
| DISALLOW_COPY_AND_ASSIGN(TestDelayedTaskManager); |
| }; |
| |
| class TaskSchedulerWorkerPoolImplTest |
| : public testing::TestWithParam<ExecutionMode> { |
| protected: |
| TaskSchedulerWorkerPoolImplTest() = default; |
| |
| void SetUp() override { |
| InitializeWorkerPool(TimeDelta::Max()); |
| } |
| |
| void TearDown() override { |
| worker_pool_->WaitForAllWorkersIdleForTesting(); |
| worker_pool_->JoinForTesting(); |
| } |
| |
| void InitializeWorkerPool(const TimeDelta& suggested_reclaim_time) { |
| worker_pool_ = SchedulerWorkerPoolImpl::Create( |
| SchedulerWorkerPoolParams("TestWorkerPoolWithFileIO", |
| ThreadPriority::NORMAL, |
| IORestriction::ALLOWED, |
| kNumWorkersInWorkerPool, |
| suggested_reclaim_time), |
| Bind(&TaskSchedulerWorkerPoolImplTest::ReEnqueueSequenceCallback, |
| Unretained(this)), |
| &task_tracker_, &delayed_task_manager_); |
| ASSERT_TRUE(worker_pool_); |
| } |
| |
| std::unique_ptr<SchedulerWorkerPoolImpl> worker_pool_; |
| |
| TaskTracker task_tracker_; |
| TestDelayedTaskManager delayed_task_manager_; |
| |
| private: |
| void ReEnqueueSequenceCallback(scoped_refptr<Sequence> sequence) { |
| // In production code, this callback would be implemented by the |
| // TaskScheduler which would first determine which PriorityQueue the |
| // sequence must be re-enqueued. |
| const SequenceSortKey sort_key(sequence->GetSortKey()); |
| worker_pool_->ReEnqueueSequence(std::move(sequence), sort_key); |
| } |
| |
| DISALLOW_COPY_AND_ASSIGN(TaskSchedulerWorkerPoolImplTest); |
| }; |
| |
| using PostNestedTask = test::TestTaskFactory::PostNestedTask; |
| |
| class ThreadPostingTasks : public SimpleThread { |
| public: |
| enum class WaitBeforePostTask { |
| NO_WAIT, |
| WAIT_FOR_ALL_WORKERS_IDLE, |
| }; |
| |
| // Constructs a thread that posts tasks to |worker_pool| through an |
| // |execution_mode| task runner. If |wait_before_post_task| is |
| // WAIT_FOR_ALL_WORKERS_IDLE, the thread waits until all workers in |
| // |worker_pool| are idle before posting a new task. If |post_nested_task| is |
| // YES, each task posted by this thread posts another task when it runs. |
| ThreadPostingTasks(SchedulerWorkerPoolImpl* worker_pool, |
| ExecutionMode execution_mode, |
| WaitBeforePostTask wait_before_post_task, |
| PostNestedTask post_nested_task) |
| : SimpleThread("ThreadPostingTasks"), |
| worker_pool_(worker_pool), |
| wait_before_post_task_(wait_before_post_task), |
| post_nested_task_(post_nested_task), |
| factory_(worker_pool_->CreateTaskRunnerWithTraits(TaskTraits(), |
| execution_mode), |
| execution_mode) { |
| DCHECK(worker_pool_); |
| } |
| |
| const test::TestTaskFactory* factory() const { return &factory_; } |
| |
| private: |
| void Run() override { |
| EXPECT_FALSE(factory_.task_runner()->RunsTasksOnCurrentThread()); |
| |
| for (size_t i = 0; i < kNumTasksPostedPerThread; ++i) { |
| if (wait_before_post_task_ == |
| WaitBeforePostTask::WAIT_FOR_ALL_WORKERS_IDLE) { |
| worker_pool_->WaitForAllWorkersIdleForTesting(); |
| } |
| EXPECT_TRUE(factory_.PostTask(post_nested_task_, Closure())); |
| } |
| } |
| |
| SchedulerWorkerPoolImpl* const worker_pool_; |
| const scoped_refptr<TaskRunner> task_runner_; |
| const WaitBeforePostTask wait_before_post_task_; |
| const PostNestedTask post_nested_task_; |
| test::TestTaskFactory factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ThreadPostingTasks); |
| }; |
| |
| using WaitBeforePostTask = ThreadPostingTasks::WaitBeforePostTask; |
| |
| void ShouldNotRunCallback() { |
| ADD_FAILURE() << "Ran a task that shouldn't run."; |
| } |
| |
| } // namespace |
| |
| TEST_P(TaskSchedulerWorkerPoolImplTest, PostTasks) { |
| // Create threads to post tasks. |
| std::vector<std::unique_ptr<ThreadPostingTasks>> threads_posting_tasks; |
| for (size_t i = 0; i < kNumThreadsPostingTasks; ++i) { |
| threads_posting_tasks.push_back(WrapUnique(new ThreadPostingTasks( |
| worker_pool_.get(), GetParam(), WaitBeforePostTask::NO_WAIT, |
| PostNestedTask::NO))); |
| threads_posting_tasks.back()->Start(); |
| } |
| |
| // Wait for all tasks to run. |
| for (const auto& thread_posting_tasks : threads_posting_tasks) { |
| thread_posting_tasks->Join(); |
| thread_posting_tasks->factory()->WaitForAllTasksToRun(); |
| } |
| |
| // Wait until all workers are idle to be sure that no task accesses |
| // its TestTaskFactory after |thread_posting_tasks| is destroyed. |
| worker_pool_->WaitForAllWorkersIdleForTesting(); |
| } |
| |
| TEST_P(TaskSchedulerWorkerPoolImplTest, PostTasksWaitAllWorkersIdle) { |
| // Create threads to post tasks. To verify that workers can sleep and be woken |
| // up when new tasks are posted, wait for all workers to become idle before |
| // posting a new task. |
| std::vector<std::unique_ptr<ThreadPostingTasks>> threads_posting_tasks; |
| for (size_t i = 0; i < kNumThreadsPostingTasks; ++i) { |
| threads_posting_tasks.push_back(WrapUnique(new ThreadPostingTasks( |
| worker_pool_.get(), GetParam(), |
| WaitBeforePostTask::WAIT_FOR_ALL_WORKERS_IDLE, PostNestedTask::NO))); |
| threads_posting_tasks.back()->Start(); |
| } |
| |
| // Wait for all tasks to run. |
| for (const auto& thread_posting_tasks : threads_posting_tasks) { |
| thread_posting_tasks->Join(); |
| thread_posting_tasks->factory()->WaitForAllTasksToRun(); |
| } |
| |
| // Wait until all workers are idle to be sure that no task accesses its |
| // TestTaskFactory after |thread_posting_tasks| is destroyed. |
| worker_pool_->WaitForAllWorkersIdleForTesting(); |
| } |
| |
| TEST_P(TaskSchedulerWorkerPoolImplTest, NestedPostTasks) { |
| // Create threads to post tasks. Each task posted by these threads will post |
| // another task when it runs. |
| std::vector<std::unique_ptr<ThreadPostingTasks>> threads_posting_tasks; |
| for (size_t i = 0; i < kNumThreadsPostingTasks; ++i) { |
| threads_posting_tasks.push_back(WrapUnique(new ThreadPostingTasks( |
| worker_pool_.get(), GetParam(), WaitBeforePostTask::NO_WAIT, |
| PostNestedTask::YES))); |
| threads_posting_tasks.back()->Start(); |
| } |
| |
| // Wait for all tasks to run. |
| for (const auto& thread_posting_tasks : threads_posting_tasks) { |
| thread_posting_tasks->Join(); |
| thread_posting_tasks->factory()->WaitForAllTasksToRun(); |
| } |
| |
| // Wait until all workers are idle to be sure that no task accesses its |
| // TestTaskFactory after |thread_posting_tasks| is destroyed. |
| worker_pool_->WaitForAllWorkersIdleForTesting(); |
| } |
| |
| TEST_P(TaskSchedulerWorkerPoolImplTest, PostTasksWithOneAvailableWorker) { |
| // Post blocking tasks to keep all workers busy except one until |event| is |
| // signaled. Use different factories so that tasks are added to different |
| // sequences and can run simultaneously when the execution mode is SEQUENCED. |
| WaitableEvent event(WaitableEvent::ResetPolicy::MANUAL, |
| WaitableEvent::InitialState::NOT_SIGNALED); |
| std::vector<std::unique_ptr<test::TestTaskFactory>> blocked_task_factories; |
| for (size_t i = 0; i < (kNumWorkersInWorkerPool - 1); ++i) { |
| blocked_task_factories.push_back(WrapUnique(new test::TestTaskFactory( |
| worker_pool_->CreateTaskRunnerWithTraits(TaskTraits(), GetParam()), |
| GetParam()))); |
| EXPECT_TRUE(blocked_task_factories.back()->PostTask( |
| PostNestedTask::NO, Bind(&WaitableEvent::Wait, Unretained(&event)))); |
| blocked_task_factories.back()->WaitForAllTasksToRun(); |
| } |
| |
| // Post |kNumTasksPostedPerThread| tasks that should all run despite the fact |
| // that only one worker in |worker_pool_| isn't busy. |
| test::TestTaskFactory short_task_factory( |
| worker_pool_->CreateTaskRunnerWithTraits(TaskTraits(), GetParam()), |
| GetParam()); |
| for (size_t i = 0; i < kNumTasksPostedPerThread; ++i) |
| EXPECT_TRUE(short_task_factory.PostTask(PostNestedTask::NO, Closure())); |
| short_task_factory.WaitForAllTasksToRun(); |
| |
| // Release tasks waiting on |event|. |
| event.Signal(); |
| |
| // Wait until all workers are idle to be sure that no task accesses |
| // its TestTaskFactory after it is destroyed. |
| worker_pool_->WaitForAllWorkersIdleForTesting(); |
| } |
| |
| TEST_P(TaskSchedulerWorkerPoolImplTest, Saturate) { |
| // Verify that it is possible to have |kNumWorkersInWorkerPool| |
| // tasks/sequences running simultaneously. Use different factories so that the |
| // blocking tasks are added to different sequences and can run simultaneously |
| // when the execution mode is SEQUENCED. |
| WaitableEvent event(WaitableEvent::ResetPolicy::MANUAL, |
| WaitableEvent::InitialState::NOT_SIGNALED); |
| std::vector<std::unique_ptr<test::TestTaskFactory>> factories; |
| for (size_t i = 0; i < kNumWorkersInWorkerPool; ++i) { |
| factories.push_back(WrapUnique(new test::TestTaskFactory( |
| worker_pool_->CreateTaskRunnerWithTraits(TaskTraits(), GetParam()), |
| GetParam()))); |
| EXPECT_TRUE(factories.back()->PostTask( |
| PostNestedTask::NO, Bind(&WaitableEvent::Wait, Unretained(&event)))); |
| factories.back()->WaitForAllTasksToRun(); |
| } |
| |
| // Release tasks waiting on |event|. |
| event.Signal(); |
| |
| // Wait until all workers are idle to be sure that no task accesses |
| // its TestTaskFactory after it is destroyed. |
| worker_pool_->WaitForAllWorkersIdleForTesting(); |
| } |
| |
| // Verify that a Task can't be posted after shutdown. |
| TEST_P(TaskSchedulerWorkerPoolImplTest, PostTaskAfterShutdown) { |
| auto task_runner = |
| worker_pool_->CreateTaskRunnerWithTraits(TaskTraits(), GetParam()); |
| task_tracker_.Shutdown(); |
| EXPECT_FALSE(task_runner->PostTask(FROM_HERE, Bind(&ShouldNotRunCallback))); |
| } |
| |
| // Verify that a Task posted with a delay is added to the DelayedTaskManager and |
| // doesn't run before its delay expires. |
| TEST_P(TaskSchedulerWorkerPoolImplTest, PostDelayedTask) { |
| EXPECT_TRUE(delayed_task_manager_.GetDelayedRunTime().is_null()); |
| |
| // Post a delayed task. |
| WaitableEvent task_ran(WaitableEvent::ResetPolicy::MANUAL, |
| WaitableEvent::InitialState::NOT_SIGNALED); |
| EXPECT_TRUE(worker_pool_->CreateTaskRunnerWithTraits(TaskTraits(), GetParam()) |
| ->PostDelayedTask(FROM_HERE, Bind(&WaitableEvent::Signal, |
| Unretained(&task_ran)), |
| TimeDelta::FromSeconds(10))); |
| |
| // The task should have been added to the DelayedTaskManager. |
| EXPECT_FALSE(delayed_task_manager_.GetDelayedRunTime().is_null()); |
| |
| // The task shouldn't run. |
| EXPECT_FALSE(task_ran.IsSignaled()); |
| |
| // Fast-forward time and post tasks that are ripe for execution. |
| delayed_task_manager_.SetCurrentTime( |
| delayed_task_manager_.GetDelayedRunTime()); |
| delayed_task_manager_.PostReadyTasks(); |
| |
| // The task should run. |
| task_ran.Wait(); |
| } |
| |
| INSTANTIATE_TEST_CASE_P(Parallel, |
| TaskSchedulerWorkerPoolImplTest, |
| ::testing::Values(ExecutionMode::PARALLEL)); |
| INSTANTIATE_TEST_CASE_P(Sequenced, |
| TaskSchedulerWorkerPoolImplTest, |
| ::testing::Values(ExecutionMode::SEQUENCED)); |
| INSTANTIATE_TEST_CASE_P(SingleThreaded, |
| TaskSchedulerWorkerPoolImplTest, |
| ::testing::Values(ExecutionMode::SINGLE_THREADED)); |
| |
| namespace { |
| |
| void NotReachedReEnqueueSequenceCallback(scoped_refptr<Sequence> sequence) { |
| ADD_FAILURE() |
| << "Unexpected invocation of NotReachedReEnqueueSequenceCallback."; |
| } |
| |
| // Verifies that the current thread allows I/O if |io_restriction| is ALLOWED |
| // and disallows it otherwise. Signals |event| before returning. |
| void ExpectIORestriction(IORestriction io_restriction, WaitableEvent* event) { |
| DCHECK(event); |
| |
| if (io_restriction == IORestriction::ALLOWED) { |
| ThreadRestrictions::AssertIOAllowed(); |
| } else { |
| static_assert( |
| ENABLE_THREAD_RESTRICTIONS == DCHECK_IS_ON(), |
| "ENABLE_THREAD_RESTRICTIONS and DCHECK_IS_ON() have diverged."); |
| EXPECT_DCHECK_DEATH({ ThreadRestrictions::AssertIOAllowed(); }, ""); |
| } |
| |
| event->Signal(); |
| } |
| |
| class TaskSchedulerWorkerPoolImplIORestrictionTest |
| : public testing::TestWithParam<IORestriction> { |
| public: |
| TaskSchedulerWorkerPoolImplIORestrictionTest() = default; |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(TaskSchedulerWorkerPoolImplIORestrictionTest); |
| }; |
| |
| } // namespace |
| |
| TEST_P(TaskSchedulerWorkerPoolImplIORestrictionTest, IORestriction) { |
| TaskTracker task_tracker; |
| DelayedTaskManager delayed_task_manager(Bind(&DoNothing)); |
| |
| auto worker_pool = SchedulerWorkerPoolImpl::Create( |
| SchedulerWorkerPoolParams("TestWorkerPoolWithParam", |
| ThreadPriority::NORMAL, GetParam(), 1U, |
| TimeDelta::Max()), |
| Bind(&NotReachedReEnqueueSequenceCallback), &task_tracker, |
| &delayed_task_manager); |
| ASSERT_TRUE(worker_pool); |
| |
| WaitableEvent task_ran(WaitableEvent::ResetPolicy::MANUAL, |
| WaitableEvent::InitialState::NOT_SIGNALED); |
| worker_pool->CreateTaskRunnerWithTraits(TaskTraits(), ExecutionMode::PARALLEL) |
| ->PostTask(FROM_HERE, Bind(&ExpectIORestriction, GetParam(), &task_ran)); |
| task_ran.Wait(); |
| |
| worker_pool->JoinForTesting(); |
| } |
| |
| INSTANTIATE_TEST_CASE_P(IOAllowed, |
| TaskSchedulerWorkerPoolImplIORestrictionTest, |
| ::testing::Values(IORestriction::ALLOWED)); |
| INSTANTIATE_TEST_CASE_P(IODisallowed, |
| TaskSchedulerWorkerPoolImplIORestrictionTest, |
| ::testing::Values(IORestriction::DISALLOWED)); |
| |
| namespace { |
| |
| class TaskSchedulerWorkerPoolSingleThreadedTest |
| : public TaskSchedulerWorkerPoolImplTest { |
| public: |
| void InitializeThreadChecker() { |
| thread_checker_.reset(new ThreadCheckerImpl()); |
| } |
| |
| void CheckValidThread() { |
| EXPECT_TRUE(thread_checker_->CalledOnValidThread()); |
| } |
| |
| protected: |
| void SetUp() override { |
| InitializeWorkerPool(kReclaimTimeForDetachTests); |
| } |
| |
| TaskSchedulerWorkerPoolSingleThreadedTest() = default; |
| |
| private: |
| std::unique_ptr<ThreadCheckerImpl> thread_checker_; |
| |
| DISALLOW_COPY_AND_ASSIGN(TaskSchedulerWorkerPoolSingleThreadedTest); |
| }; |
| |
| } // namespace |
| |
| // Verify that thread resources for a single thread remain. |
| TEST_F(TaskSchedulerWorkerPoolSingleThreadedTest, SingleThreadTask) { |
| auto single_thread_task_runner = |
| worker_pool_->CreateTaskRunnerWithTraits( |
| TaskTraits(). |
| WithShutdownBehavior(TaskShutdownBehavior::BLOCK_SHUTDOWN), |
| ExecutionMode::SINGLE_THREADED); |
| single_thread_task_runner->PostTask( |
| FROM_HERE, |
| Bind(&TaskSchedulerWorkerPoolSingleThreadedTest::InitializeThreadChecker, |
| Unretained(this))); |
| WaitableEvent task_waiter(WaitableEvent::ResetPolicy::AUTOMATIC, |
| WaitableEvent::InitialState::NOT_SIGNALED); |
| single_thread_task_runner->PostTask( |
| FROM_HERE, Bind(&WaitableEvent::Signal, Unretained(&task_waiter))); |
| task_waiter.Wait(); |
| worker_pool_->WaitForAllWorkersIdleForTesting(); |
| |
| // Give the worker pool a chance to reclaim its threads. |
| PlatformThread::Sleep( |
| kReclaimTimeForDetachTests + TimeDelta::FromMilliseconds(200)); |
| |
| worker_pool_->DisallowWorkerDetachmentForTesting(); |
| |
| single_thread_task_runner->PostTask( |
| FROM_HERE, |
| Bind(&TaskSchedulerWorkerPoolSingleThreadedTest::CheckValidThread, |
| Unretained(this))); |
| single_thread_task_runner->PostTask( |
| FROM_HERE, Bind(&WaitableEvent::Signal, Unretained(&task_waiter))); |
| task_waiter.Wait(); |
| } |
| |
| namespace { |
| |
| constexpr size_t kMagicTlsValue = 42; |
| |
| class TaskSchedulerWorkerPoolCheckTlsReuse |
| : public TaskSchedulerWorkerPoolImplTest { |
| public: |
| void SetTlsValueAndWait() { |
| slot_.Set(reinterpret_cast<void*>(kMagicTlsValue)); |
| waiter_.Wait(); |
| } |
| |
| void CountZeroTlsValuesAndWait(WaitableEvent* count_waiter) { |
| if (!slot_.Get()) |
| subtle::NoBarrier_AtomicIncrement(&zero_tls_values_, 1); |
| |
| count_waiter->Signal(); |
| waiter_.Wait(); |
| } |
| |
| protected: |
| TaskSchedulerWorkerPoolCheckTlsReuse() : |
| waiter_(WaitableEvent::ResetPolicy::MANUAL, |
| WaitableEvent::InitialState::NOT_SIGNALED) {} |
| |
| void SetUp() override { |
| InitializeWorkerPool(kReclaimTimeForDetachTests); |
| } |
| |
| subtle::Atomic32 zero_tls_values_ = 0; |
| |
| WaitableEvent waiter_; |
| |
| private: |
| ThreadLocalStorage::Slot slot_; |
| |
| DISALLOW_COPY_AND_ASSIGN(TaskSchedulerWorkerPoolCheckTlsReuse); |
| }; |
| |
| } // namespace |
| |
| // Checks that at least one thread has detached by checking the TLS. |
| TEST_F(TaskSchedulerWorkerPoolCheckTlsReuse, CheckDetachedThreads) { |
| // Saturate the threads and mark each thread with a magic TLS value. |
| std::vector<std::unique_ptr<test::TestTaskFactory>> factories; |
| for (size_t i = 0; i < kNumWorkersInWorkerPool; ++i) { |
| factories.push_back(WrapUnique(new test::TestTaskFactory( |
| worker_pool_->CreateTaskRunnerWithTraits( |
| TaskTraits(), ExecutionMode::PARALLEL), |
| ExecutionMode::PARALLEL))); |
| ASSERT_TRUE(factories.back()->PostTask( |
| PostNestedTask::NO, |
| Bind(&TaskSchedulerWorkerPoolCheckTlsReuse::SetTlsValueAndWait, |
| Unretained(this)))); |
| factories.back()->WaitForAllTasksToRun(); |
| } |
| |
| // Release tasks waiting on |waiter_|. |
| waiter_.Signal(); |
| worker_pool_->WaitForAllWorkersIdleForTesting(); |
| |
| // All threads should be done running by now, so reset for the next phase. |
| waiter_.Reset(); |
| |
| // Give the worker pool a chance to detach its threads. |
| PlatformThread::Sleep( |
| kReclaimTimeForDetachTests + TimeDelta::FromMilliseconds(200)); |
| |
| worker_pool_->DisallowWorkerDetachmentForTesting(); |
| |
| // Saturate and count the threads that do not have the magic TLS value. If the |
| // value is not there, that means we're at a new thread. |
| std::vector<std::unique_ptr<WaitableEvent>> count_waiters; |
| for (auto& factory : factories) { |
| count_waiters.push_back(WrapUnique(new WaitableEvent( |
| WaitableEvent::ResetPolicy::MANUAL, |
| WaitableEvent::InitialState::NOT_SIGNALED))); |
| ASSERT_TRUE(factory->PostTask( |
| PostNestedTask::NO, |
| Bind(&TaskSchedulerWorkerPoolCheckTlsReuse::CountZeroTlsValuesAndWait, |
| Unretained(this), |
| count_waiters.back().get()))); |
| factory->WaitForAllTasksToRun(); |
| } |
| |
| // Wait for all counters to complete. |
| for (auto& count_waiter : count_waiters) |
| count_waiter->Wait(); |
| |
| EXPECT_GT(subtle::NoBarrier_Load(&zero_tls_values_), 0); |
| |
| // Release tasks waiting on |waiter_|. |
| waiter_.Signal(); |
| } |
| |
| } // namespace internal |
| } // namespace base |