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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "components/scheduler/base/task_queue_manager.h" | 5 #include "components/scheduler/base/task_queue_manager.h" |
6 | 6 |
7 #include <queue> | 7 #include <queue> |
8 #include <set> | 8 #include <set> |
9 | 9 |
10 #include "base/bind.h" | 10 #include "base/bind.h" |
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188 // pump-after-wakeup queue. | 188 // pump-after-wakeup queue. |
189 UpdateWorkQueues(false, nullptr); | 189 UpdateWorkQueues(false, nullptr); |
190 | 190 |
191 internal::TaskQueueImpl::Task previous_task; | 191 internal::TaskQueueImpl::Task previous_task; |
192 for (int i = 0; i < work_batch_size_; i++) { | 192 for (int i = 0; i < work_batch_size_; i++) { |
193 internal::WorkQueue* work_queue; | 193 internal::WorkQueue* work_queue; |
194 if (!SelectWorkQueueToService(&work_queue)) { | 194 if (!SelectWorkQueueToService(&work_queue)) { |
195 break; | 195 break; |
196 } | 196 } |
197 | 197 |
| 198 bool should_trigger_wakeup = work_queue->task_queue()->wakeup_policy() == |
| 199 TaskQueue::WakeupPolicy::CAN_WAKE_OTHER_QUEUES; |
198 switch (ProcessTaskFromWorkQueue(work_queue, &previous_task)) { | 200 switch (ProcessTaskFromWorkQueue(work_queue, &previous_task)) { |
199 case ProcessTaskResult::DEFERRED: | 201 case ProcessTaskResult::DEFERRED: |
200 // If a task was deferred, try again with another task. Note that this | 202 // If a task was deferred, try again with another task. Note that this |
201 // means deferred tasks (i.e. non-nestable tasks) will never trigger | 203 // means deferred tasks (i.e. non-nestable tasks) will never trigger |
202 // queue wake-ups. | 204 // queue wake-ups. |
203 continue; | 205 continue; |
204 case ProcessTaskResult::EXECUTED: | 206 case ProcessTaskResult::EXECUTED: |
205 break; | 207 break; |
206 case ProcessTaskResult::TASK_QUEUE_MANAGER_DELETED: | 208 case ProcessTaskResult::TASK_QUEUE_MANAGER_DELETED: |
207 return; // The TaskQueueManager got deleted, we must bail out. | 209 return; // The TaskQueueManager got deleted, we must bail out. |
208 } | 210 } |
209 bool should_trigger_wakeup = work_queue->task_queue()->wakeup_policy() == | 211 work_queue = nullptr; // The queue may have been unregistered. |
210 TaskQueue::WakeupPolicy::CAN_WAKE_OTHER_QUEUES; | 212 |
211 UpdateWorkQueues(should_trigger_wakeup, &previous_task); | 213 UpdateWorkQueues(should_trigger_wakeup, &previous_task); |
212 | 214 |
213 // Only run a single task per batch in nested run loops so that we can | 215 // Only run a single task per batch in nested run loops so that we can |
214 // properly exit the nested loop when someone calls RunLoop::Quit(). | 216 // properly exit the nested loop when someone calls RunLoop::Quit(). |
215 if (delegate_->IsNested()) | 217 if (delegate_->IsNested()) |
216 break; | 218 break; |
217 } | 219 } |
218 | 220 |
219 // TODO(alexclarke): Consider refactoring the above loop to terminate only | 221 // TODO(alexclarke): Consider refactoring the above loop to terminate only |
220 // when there's no more work left to be done, rather than posting a | 222 // when there's no more work left to be done, rather than posting a |
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404 internal::WorkQueue* work_queue) { | 406 internal::WorkQueue* work_queue) { |
405 DCHECK(main_thread_checker_.CalledOnValidThread()); | 407 DCHECK(main_thread_checker_.CalledOnValidThread()); |
406 DCHECK(!work_queue->Empty()); | 408 DCHECK(!work_queue->Empty()); |
407 if (observer_) { | 409 if (observer_) { |
408 observer_->OnTriedToExecuteBlockedTask(*work_queue->task_queue(), | 410 observer_->OnTriedToExecuteBlockedTask(*work_queue->task_queue(), |
409 *work_queue->GetFrontTask()); | 411 *work_queue->GetFrontTask()); |
410 } | 412 } |
411 } | 413 } |
412 | 414 |
413 } // namespace scheduler | 415 } // namespace scheduler |
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