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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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_SINGLE_THREAD_TASK_RUNNER_H_ | 5 #ifndef BASE_SINGLE_THREAD_TASK_RUNNER_H_ |
6 #define BASE_SINGLE_THREAD_TASK_RUNNER_H_ | 6 #define BASE_SINGLE_THREAD_TASK_RUNNER_H_ |
7 | 7 |
8 #include "base/base_export.h" | 8 #include "base/base_export.h" |
9 #include "base/sequenced_task_runner.h" | 9 #include "base/sequenced_task_runner.h" |
10 | 10 |
11 namespace base { | 11 namespace base { |
12 | 12 |
13 // A SingleThreadTaskRunner is a SequencedTaskRunner with one more | 13 // A SingleThreadTaskRunner is a SequencedTaskRunner with one more |
14 // guarantee; namely, that all tasks are run on a single dedicated | 14 // guarantee; namely, that all tasks are run on a single dedicated |
15 // thread. Most use cases require only a SequencedTaskRunner, unless | 15 // thread. Most use cases require only a SequencedTaskRunner, unless |
16 // there is a specific need to run tasks on only a single thread. | 16 // there is a specific need to run tasks on only a single thread. |
17 // | 17 // |
18 // SingleThreadTaskRunner implementations might: | 18 // SingleThreadTaskRunner implementations might: |
19 // - Post tasks to an existing thread's MessageLoop (see MessageLoopProxy). | 19 // - Post tasks to an existing thread's MessageLoop. |
danakj
2015/04/21 20:16:30
Is there maybe somewhere else you could refer to h
Sami
2015/04/23 17:48:24
Good point, MessageLoop::task_runner() is probably
| |
20 // - Create their own worker thread and MessageLoop to post tasks to. | 20 // - Create their own worker thread and MessageLoop to post tasks to. |
21 // - Add tasks to a FIFO and signal to a non-MessageLoop thread for them to | 21 // - Add tasks to a FIFO and signal to a non-MessageLoop thread for them to |
22 // be processed. This allows TaskRunner-oriented code run on threads | 22 // be processed. This allows TaskRunner-oriented code run on threads |
23 // running other kinds of message loop, e.g. Jingle threads. | 23 // running other kinds of message loop, e.g. Jingle threads. |
24 class BASE_EXPORT SingleThreadTaskRunner : public SequencedTaskRunner { | 24 class BASE_EXPORT SingleThreadTaskRunner : public SequencedTaskRunner { |
25 public: | 25 public: |
26 // A more explicit alias to RunsTasksOnCurrentThread(). | 26 // A more explicit alias to RunsTasksOnCurrentThread(). |
27 bool BelongsToCurrentThread() const { | 27 bool BelongsToCurrentThread() const { |
28 return RunsTasksOnCurrentThread(); | 28 return RunsTasksOnCurrentThread(); |
29 } | 29 } |
30 | 30 |
31 protected: | 31 protected: |
32 ~SingleThreadTaskRunner() override {} | 32 ~SingleThreadTaskRunner() override {} |
33 }; | 33 }; |
34 | 34 |
35 } // namespace base | 35 } // namespace base |
36 | 36 |
37 #endif // BASE_SINGLE_THREAD_TASK_RUNNER_H_ | 37 #endif // BASE_SINGLE_THREAD_TASK_RUNNER_H_ |
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