| OLD | NEW |
| 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2013 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 #ifndef BASE_DEFERRED_SEQUENCED_TASKRUNNER_H_ | 5 #ifndef BASE_DEFERRED_SEQUENCED_TASKRUNNER_H_ |
| 6 #define BASE_DEFERRED_SEQUENCED_TASKRUNNER_H_ | 6 #define BASE_DEFERRED_SEQUENCED_TASKRUNNER_H_ |
| 7 | 7 |
| 8 #include <vector> | 8 #include <vector> |
| 9 | 9 |
| 10 #include "base/base_export.h" | 10 #include "base/base_export.h" |
| 11 #include "base/basictypes.h" | 11 #include "base/basictypes.h" |
| 12 #include "base/callback.h" | 12 #include "base/callback.h" |
| 13 #include "base/compiler_specific.h" | 13 #include "base/compiler_specific.h" |
| 14 #include "base/memory/ref_counted.h" | 14 #include "base/memory/ref_counted.h" |
| 15 #include "base/sequenced_task_runner.h" | 15 #include "base/sequenced_task_runner.h" |
| 16 #include "base/synchronization/lock.h" | 16 #include "base/synchronization/lock.h" |
| 17 #include "base/time/time.h" | 17 #include "base/time/time.h" |
| 18 #include "base/tracked_objects.h" | 18 #include "base/tracked_objects.h" |
| 19 | 19 |
| 20 namespace base { | 20 namespace base { |
| 21 | 21 |
| 22 // A DeferredSequencedTaskRunner is a subclass of SequencedTaskRunner that | 22 // A DeferredSequencedTaskRunner is a subclass of SequencedTaskRunner that |
| 23 // queues up all requests until the first call to Start() is issued. | 23 // queues up all requests until the first call to Start() is issued. |
| 24 class BASE_EXPORT DeferredSequencedTaskRunner : public SequencedTaskRunner { | 24 class BASE_EXPORT DeferredSequencedTaskRunner : public SequencedTaskRunner { |
| 25 public: | 25 public: |
| 26 explicit DeferredSequencedTaskRunner( | 26 explicit DeferredSequencedTaskRunner( |
| 27 const scoped_refptr<SequencedTaskRunner>& target_runner); | 27 const scoped_refptr<SequencedTaskRunner>& target_runner); |
| 28 | 28 |
| 29 // TaskRunner implementation | 29 // TaskRunner implementation |
| 30 virtual bool PostDelayedTask(const tracked_objects::Location& from_here, | 30 bool PostDelayedTask(const tracked_objects::Location& from_here, |
| 31 const Closure& task, | 31 const Closure& task, |
| 32 TimeDelta delay) OVERRIDE; | 32 TimeDelta delay) override; |
| 33 virtual bool RunsTasksOnCurrentThread() const OVERRIDE; | 33 bool RunsTasksOnCurrentThread() const override; |
| 34 | 34 |
| 35 // SequencedTaskRunner implementation | 35 // SequencedTaskRunner implementation |
| 36 virtual bool PostNonNestableDelayedTask( | 36 bool PostNonNestableDelayedTask(const tracked_objects::Location& from_here, |
| 37 const tracked_objects::Location& from_here, | 37 const Closure& task, |
| 38 const Closure& task, | 38 TimeDelta delay) override; |
| 39 TimeDelta delay) OVERRIDE; | |
| 40 | 39 |
| 41 // Start the execution - posts all queued tasks to the target executor. The | 40 // Start the execution - posts all queued tasks to the target executor. The |
| 42 // deferred tasks are posted with their initial delay, meaning that the task | 41 // deferred tasks are posted with their initial delay, meaning that the task |
| 43 // execution delay is actually measured from Start. | 42 // execution delay is actually measured from Start. |
| 44 // Fails when called a second time. | 43 // Fails when called a second time. |
| 45 void Start(); | 44 void Start(); |
| 46 | 45 |
| 47 private: | 46 private: |
| 48 struct DeferredTask { | 47 struct DeferredTask { |
| 49 DeferredTask(); | 48 DeferredTask(); |
| (...skipping 20 matching lines...) Expand all Loading... |
| 70 bool started_; | 69 bool started_; |
| 71 const scoped_refptr<SequencedTaskRunner> target_task_runner_; | 70 const scoped_refptr<SequencedTaskRunner> target_task_runner_; |
| 72 std::vector<DeferredTask> deferred_tasks_queue_; | 71 std::vector<DeferredTask> deferred_tasks_queue_; |
| 73 | 72 |
| 74 DISALLOW_COPY_AND_ASSIGN(DeferredSequencedTaskRunner); | 73 DISALLOW_COPY_AND_ASSIGN(DeferredSequencedTaskRunner); |
| 75 }; | 74 }; |
| 76 | 75 |
| 77 } // namespace base | 76 } // namespace base |
| 78 | 77 |
| 79 #endif // BASE_DEFERRED_SEQUENCED_TASKRUNNER_H_ | 78 #endif // BASE_DEFERRED_SEQUENCED_TASKRUNNER_H_ |
| OLD | NEW |