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