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// 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_
#pragma once
#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 dedicated.
//
// Some theoretical implementations of SingleThreadTaskRunner:
//
// - A SingleThreadTaskRunner that uses a single worker thread to
// run posted tasks (i.e., a message loop).
//
// - A SingleThreadTaskRunner that stores the list of posted tasks
// and has a method Run() that runs each runnable task in FIFO
// order that must be run only from the thread the
// SingleThreadTaskRunner was created on.
class BASE_EXPORT SingleThreadTaskRunner : public SequencedTaskRunner {
public:
// A more explicit alias to RunsTasksOnCurrentThread().
bool BelongsToCurrentThread() const {
return RunsTasksOnCurrentThread();
}
protected:
virtual ~SingleThreadTaskRunner() {}
};
} // namespace base
#endif // BASE_SERIAL_TASK_RUNNER_H_
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