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51 lines
1.8 KiB
C++
51 lines
1.8 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_MESSAGE_LOOP_MESSAGE_LOOP_PROXY_H_
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#define BASE_MESSAGE_LOOP_MESSAGE_LOOP_PROXY_H_
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#include "base/base_export.h"
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#include "base/compiler_specific.h"
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#include "base/memory/ref_counted.h"
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#include "base/single_thread_task_runner.h"
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// MessageLoopProxy is deprecated. Code should prefer to depend on TaskRunner
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// (or the various specializations) for passing task runners around, and should
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// use ThreadTaskRunnerHandle::Get() to get the thread's associated task runner.
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//
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// See http://crbug.com/391045 for more details.
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// Example for these changes:
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//
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// base::MessageLoopProxy::current() -> base::ThreadTaskRunnerHandle::Get()
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// scoped_refptr<base::MessageLoopProxy> ->
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// scoped_refptr<base::SingleThreadTaskRunner>
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// base::MessageLoopProxy -> base::SingleThreadTaskRunner
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namespace base {
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// This class provides a thread-safe refcounted interface to the Post* methods
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// of a message loop. This class can outlive the target message loop.
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// MessageLoopProxy objects are constructed automatically for all MessageLoops.
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// So, to access them, you can use any of the following:
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// Thread::message_loop_proxy()
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// MessageLoop::current()->message_loop_proxy()
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// MessageLoopProxy::current()
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//
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// TODO(akalin): Now that we have the *TaskRunner interfaces, we can
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// merge this with MessageLoopProxyImpl.
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class BASE_EXPORT MessageLoopProxy : public SingleThreadTaskRunner {
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public:
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// Gets the MessageLoopProxy for the current message loop, creating one if
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// needed.
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static scoped_refptr<MessageLoopProxy> current();
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protected:
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MessageLoopProxy();
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~MessageLoopProxy() override;
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};
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} // namespace base
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#endif // BASE_MESSAGE_LOOP_MESSAGE_LOOP_PROXY_H_
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