1// Copyright (c) 2012 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#ifndef BASE_MESSAGE_LOOP_MESSAGE_LOOP_PROXY_H_ 6#define BASE_MESSAGE_LOOP_MESSAGE_LOOP_PROXY_H_ 7 8#include "base/base_export.h" 9#include "base/compiler_specific.h" 10#include "base/memory/ref_counted.h" 11#include "base/single_thread_task_runner.h" 12 13namespace base { 14 15// This class provides a thread-safe refcounted interface to the Post* methods 16// of a message loop. This class can outlive the target message loop. 17// MessageLoopProxy objects are constructed automatically for all MessageLoops. 18// So, to access them, you can use any of the following: 19// Thread::message_loop_proxy() 20// MessageLoop::current()->message_loop_proxy() 21// MessageLoopProxy::current() 22// 23// TODO(akalin): Now that we have the *TaskRunner interfaces, we can 24// merge this with MessageLoopProxyImpl. 25class BASE_EXPORT MessageLoopProxy : public SingleThreadTaskRunner { 26 public: 27 // Gets the MessageLoopProxy for the current message loop, creating one if 28 // needed. 29 static scoped_refptr<MessageLoopProxy> current(); 30 31 protected: 32 MessageLoopProxy(); 33 virtual ~MessageLoopProxy(); 34}; 35 36} // namespace base 37 38#endif // BASE_MESSAGE_LOOP_MESSAGE_LOOP_PROXY_H_ 39