41 lines
1.3 KiB
C++
41 lines
1.3 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_THREAD_TASK_RUNNER_HANDLE_H_
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#define BASE_THREAD_TASK_RUNNER_HANDLE_H_
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#include "base/base_export.h"
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#include "base/memory/ref_counted.h"
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namespace base {
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class SingleThreadTaskRunner;
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// ThreadTaskRunnerHandle stores a reference to a thread's TaskRunner
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// in thread-local storage. Callers can then retrieve the TaskRunner
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// for the current thread by calling ThreadTaskRunnerHandle::Get().
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// At most one TaskRunner may be bound to each thread at a time.
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class BASE_EXPORT ThreadTaskRunnerHandle {
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public:
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// Gets the SingleThreadTaskRunner for the current thread.
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static scoped_refptr<SingleThreadTaskRunner> Get();
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// Returns true if the SingleThreadTaskRunner is already created for
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// the current thread.
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static bool IsSet();
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// Binds |task_runner| to the current thread. |task_runner| must belong
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// to the current thread for this to succeed.
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explicit ThreadTaskRunnerHandle(
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const scoped_refptr<SingleThreadTaskRunner>& task_runner);
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~ThreadTaskRunnerHandle();
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private:
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scoped_refptr<SingleThreadTaskRunner> task_runner_;
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};
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} // namespace base
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#endif // BASE_THREAD_TASK_RUNNER_HANDLE_H_
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