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| 1 // Copyright 2017 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "base/task_scheduler/scheduler_single_thread_task_runner_manager.h" |
| 6 |
| 7 #include "base/bind.h" |
| 8 #include "base/memory/ptr_util.h" |
| 9 #include "base/synchronization/lock.h" |
| 10 #include "base/synchronization/waitable_event.h" |
| 11 #include "base/task_scheduler/delayed_task_manager.h" |
| 12 #include "base/task_scheduler/post_task.h" |
| 13 #include "base/task_scheduler/scheduler_worker_pool_params.h" |
| 14 #include "base/task_scheduler/task_tracker.h" |
| 15 #include "base/task_scheduler/task_traits.h" |
| 16 #include "base/test/test_timeouts.h" |
| 17 #include "base/threading/thread.h" |
| 18 #include "testing/gtest/include/gtest/gtest.h" |
| 19 |
| 20 namespace base { |
| 21 namespace internal { |
| 22 |
| 23 namespace { |
| 24 |
| 25 enum WorkerPoolType { |
| 26 BACKGROUND_WORKER_POOL = 0, |
| 27 FOREGROUND_WORKER_POOL, |
| 28 }; |
| 29 |
| 30 static size_t GetThreadPoolIndexForTraits(const TaskTraits& traits) { |
| 31 return traits.priority() == TaskPriority::BACKGROUND ? BACKGROUND_WORKER_POOL |
| 32 : FOREGROUND_WORKER_POOL; |
| 33 } |
| 34 |
| 35 class TaskSchedulerSingleThreadTaskRunnerManagerTest : public testing::Test { |
| 36 public: |
| 37 TaskSchedulerSingleThreadTaskRunnerManagerTest() |
| 38 : service_thread_("TaskSchedulerServiceThread") {} |
| 39 |
| 40 void SetUp() override { |
| 41 service_thread_.Start(); |
| 42 |
| 43 using StandbyThreadPolicy = SchedulerWorkerPoolParams::StandbyThreadPolicy; |
| 44 |
| 45 std::vector<SchedulerWorkerPoolParams> params_vector; |
| 46 |
| 47 ASSERT_EQ(BACKGROUND_WORKER_POOL, params_vector.size()); |
| 48 params_vector.emplace_back("Background", ThreadPriority::BACKGROUND, |
| 49 StandbyThreadPolicy::LAZY, 1U, TimeDelta::Max()); |
| 50 |
| 51 ASSERT_EQ(FOREGROUND_WORKER_POOL, params_vector.size()); |
| 52 params_vector.emplace_back("Foreground", ThreadPriority::NORMAL, |
| 53 StandbyThreadPolicy::LAZY, 1U, TimeDelta::Max()); |
| 54 |
| 55 delayed_task_manager_ = |
| 56 MakeUnique<DelayedTaskManager>(service_thread_.task_runner()); |
| 57 single_thread_task_runner_manager_ = |
| 58 MakeUnique<SchedulerSingleThreadTaskRunnerManager>( |
| 59 params_vector, Bind(&GetThreadPoolIndexForTraits), &task_tracker_, |
| 60 delayed_task_manager_.get()); |
| 61 } |
| 62 |
| 63 void TearDown() override { |
| 64 single_thread_task_runner_manager_->JoinForTesting(); |
| 65 single_thread_task_runner_manager_.reset(); |
| 66 delayed_task_manager_.reset(); |
| 67 service_thread_.Stop(); |
| 68 } |
| 69 |
| 70 protected: |
| 71 std::unique_ptr<SchedulerSingleThreadTaskRunnerManager> |
| 72 single_thread_task_runner_manager_; |
| 73 TaskTracker task_tracker_; |
| 74 |
| 75 private: |
| 76 Thread service_thread_; |
| 77 std::unique_ptr<DelayedTaskManager> delayed_task_manager_; |
| 78 |
| 79 DISALLOW_COPY_AND_ASSIGN(TaskSchedulerSingleThreadTaskRunnerManagerTest); |
| 80 }; |
| 81 |
| 82 void CaptureThreadId(PlatformThreadId* thread_id) { |
| 83 ASSERT_TRUE(thread_id); |
| 84 *thread_id = PlatformThread::CurrentId(); |
| 85 } |
| 86 |
| 87 void CaptureThreadPriority(ThreadPriority* thread_priority) { |
| 88 ASSERT_TRUE(thread_priority); |
| 89 *thread_priority = PlatformThread::GetCurrentThreadPriority(); |
| 90 } |
| 91 |
| 92 void ShouldNotRun() { |
| 93 ADD_FAILURE() << "Ran a task that shouldn't run."; |
| 94 } |
| 95 |
| 96 } // namespace |
| 97 |
| 98 TEST_F(TaskSchedulerSingleThreadTaskRunnerManagerTest, DifferentThreadsUsed) { |
| 99 scoped_refptr<SingleThreadTaskRunner> task_runner_1 = |
| 100 single_thread_task_runner_manager_ |
| 101 ->CreateSingleThreadTaskRunnerWithTraits( |
| 102 TaskTraits().WithShutdownBehavior( |
| 103 TaskShutdownBehavior::BLOCK_SHUTDOWN)); |
| 104 scoped_refptr<SingleThreadTaskRunner> task_runner_2 = |
| 105 single_thread_task_runner_manager_ |
| 106 ->CreateSingleThreadTaskRunnerWithTraits( |
| 107 TaskTraits().WithShutdownBehavior( |
| 108 TaskShutdownBehavior::BLOCK_SHUTDOWN)); |
| 109 |
| 110 PlatformThreadId thread_id_1 = kInvalidThreadId; |
| 111 task_runner_1->PostTask(FROM_HERE, Bind(&CaptureThreadId, &thread_id_1)); |
| 112 PlatformThreadId thread_id_2 = kInvalidThreadId; |
| 113 task_runner_2->PostTask(FROM_HERE, Bind(&CaptureThreadId, &thread_id_2)); |
| 114 |
| 115 task_tracker_.Shutdown(); |
| 116 |
| 117 ASSERT_NE(kInvalidThreadId, thread_id_1); |
| 118 ASSERT_NE(kInvalidThreadId, thread_id_2); |
| 119 EXPECT_NE(thread_id_1, thread_id_2); |
| 120 } |
| 121 |
| 122 TEST_F(TaskSchedulerSingleThreadTaskRunnerManagerTest, PrioritySetCorrectly) { |
| 123 // Why are events used here instead of the task tracker? |
| 124 // Shutting down can cause priorities to get raised. This means we have to use |
| 125 // events to determine when a task is run. |
| 126 scoped_refptr<SingleThreadTaskRunner> task_runner_background = |
| 127 single_thread_task_runner_manager_ |
| 128 ->CreateSingleThreadTaskRunnerWithTraits( |
| 129 TaskTraits().WithPriority(TaskPriority::BACKGROUND)); |
| 130 scoped_refptr<SingleThreadTaskRunner> task_runner_user_visible = |
| 131 single_thread_task_runner_manager_ |
| 132 ->CreateSingleThreadTaskRunnerWithTraits( |
| 133 TaskTraits().WithPriority(TaskPriority::USER_VISIBLE)); |
| 134 scoped_refptr<SingleThreadTaskRunner> task_runner_user_blocking = |
| 135 single_thread_task_runner_manager_ |
| 136 ->CreateSingleThreadTaskRunnerWithTraits( |
| 137 TaskTraits() |
| 138 .WithPriority(TaskPriority::USER_BLOCKING) |
| 139 .WithShutdownBehavior(TaskShutdownBehavior::BLOCK_SHUTDOWN)); |
| 140 |
| 141 ThreadPriority thread_priority_background; |
| 142 task_runner_background->PostTask( |
| 143 FROM_HERE, Bind(&CaptureThreadPriority, &thread_priority_background)); |
| 144 WaitableEvent waitable_event_background( |
| 145 WaitableEvent::ResetPolicy::MANUAL, |
| 146 WaitableEvent::InitialState::NOT_SIGNALED); |
| 147 task_runner_background->PostTask( |
| 148 FROM_HERE, |
| 149 Bind(&WaitableEvent::Signal, Unretained(&waitable_event_background))); |
| 150 |
| 151 ThreadPriority thread_priority_user_visible; |
| 152 task_runner_user_visible->PostTask( |
| 153 FROM_HERE, Bind(&CaptureThreadPriority, &thread_priority_user_visible)); |
| 154 WaitableEvent waitable_event_user_visible( |
| 155 WaitableEvent::ResetPolicy::MANUAL, |
| 156 WaitableEvent::InitialState::NOT_SIGNALED); |
| 157 task_runner_user_visible->PostTask( |
| 158 FROM_HERE, |
| 159 Bind(&WaitableEvent::Signal, Unretained(&waitable_event_user_visible))); |
| 160 |
| 161 ThreadPriority thread_priority_user_blocking; |
| 162 task_runner_user_blocking->PostTask( |
| 163 FROM_HERE, Bind(&CaptureThreadPriority, &thread_priority_user_blocking)); |
| 164 WaitableEvent waitable_event_user_blocking( |
| 165 WaitableEvent::ResetPolicy::MANUAL, |
| 166 WaitableEvent::InitialState::NOT_SIGNALED); |
| 167 task_runner_user_blocking->PostTask( |
| 168 FROM_HERE, |
| 169 Bind(&WaitableEvent::Signal, Unretained(&waitable_event_user_blocking))); |
| 170 |
| 171 waitable_event_background.Wait(); |
| 172 waitable_event_user_visible.Wait(); |
| 173 waitable_event_user_blocking.Wait(); |
| 174 |
| 175 if (Lock::HandlesMultipleThreadPriorities()) |
| 176 EXPECT_EQ(ThreadPriority::BACKGROUND, thread_priority_background); |
| 177 else |
| 178 EXPECT_EQ(ThreadPriority::NORMAL, thread_priority_background); |
| 179 EXPECT_EQ(ThreadPriority::NORMAL, thread_priority_user_visible); |
| 180 EXPECT_EQ(ThreadPriority::NORMAL, thread_priority_user_blocking); |
| 181 } |
| 182 |
| 183 TEST_F(TaskSchedulerSingleThreadTaskRunnerManagerTest, PostTaskAfterShutdown) { |
| 184 auto task_runner = single_thread_task_runner_manager_ |
| 185 ->CreateSingleThreadTaskRunnerWithTraits(TaskTraits()); |
| 186 task_tracker_.Shutdown(); |
| 187 EXPECT_FALSE(task_runner->PostTask(FROM_HERE, Bind(&ShouldNotRun))); |
| 188 } |
| 189 |
| 190 // Verify that a Task runs shortly after its delay expires. |
| 191 TEST_F(TaskSchedulerSingleThreadTaskRunnerManagerTest, PostDelayedTask) { |
| 192 TimeTicks start_time = TimeTicks::Now(); |
| 193 |
| 194 // Post a task with a short delay. |
| 195 WaitableEvent task_ran(WaitableEvent::ResetPolicy::MANUAL, |
| 196 WaitableEvent::InitialState::NOT_SIGNALED); |
| 197 auto task_runner = single_thread_task_runner_manager_ |
| 198 ->CreateSingleThreadTaskRunnerWithTraits(TaskTraits()); |
| 199 EXPECT_TRUE(task_runner->PostDelayedTask( |
| 200 FROM_HERE, Bind(&WaitableEvent::Signal, Unretained(&task_ran)), |
| 201 TestTimeouts::tiny_timeout())); |
| 202 |
| 203 // Wait until the task runs. |
| 204 task_ran.Wait(); |
| 205 |
| 206 // Expect the task to run after its delay expires, but not more than 250 ms |
| 207 // after that. |
| 208 const TimeDelta actual_delay = TimeTicks::Now() - start_time; |
| 209 EXPECT_GE(actual_delay, TestTimeouts::tiny_timeout()); |
| 210 EXPECT_LT(actual_delay, |
| 211 TimeDelta::FromMilliseconds(250) + TestTimeouts::tiny_timeout()); |
| 212 } |
| 213 |
| 214 } // namespace internal |
| 215 } // namespace base |
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