| // Copyright (c) 2012 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. |
| |
| #ifndef BASE_SINGLE_THREAD_TASK_RUNNER_H_ |
| #define BASE_SINGLE_THREAD_TASK_RUNNER_H_ |
| |
| #include "base/base_export.h" |
| #include "base/sequenced_task_runner.h" |
| |
| namespace base { |
| |
| // A SingleThreadTaskRunner is a SequencedTaskRunner with one more |
| // guarantee; namely, that all tasks are run on a single dedicated |
| // thread. Most use cases require only a SequencedTaskRunner, unless |
| // there is a specific need to run tasks on only a single thread. |
| // |
| // SingleThreadTaskRunner implementations might: |
| // - Post tasks to an existing thread's MessageLoop (see |
| // MessageLoop::task_runner()). |
| // - Create their own worker thread and MessageLoop to post tasks to. |
| // - Add tasks to a FIFO and signal to a non-MessageLoop thread for them to |
| // be processed. This allows TaskRunner-oriented code run on threads |
| // running other kinds of message loop, e.g. Jingle threads. |
| class BASE_EXPORT SingleThreadTaskRunner : public SequencedTaskRunner { |
| public: |
| // A more explicit alias to RunsTasksInCurrentSequence(). |
| bool BelongsToCurrentThread() const { return RunsTasksInCurrentSequence(); } |
| |
| protected: |
| ~SingleThreadTaskRunner() override = default; |
| }; |
| |
| } // namespace base |
| |
| #endif // BASE_SINGLE_THREAD_TASK_RUNNER_H_ |