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59 lines
2.0 KiB
C++
59 lines
2.0 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_IMPL_H_
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#define BASE_MESSAGE_LOOP_MESSAGE_LOOP_PROXY_IMPL_H_
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#include "base/base_export.h"
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#include "base/memory/ref_counted.h"
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#include "base/message_loop/message_loop_proxy.h"
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#include "base/pending_task.h"
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#include "base/synchronization/lock.h"
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#include "base/threading/platform_thread.h"
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namespace base {
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namespace internal {
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class IncomingTaskQueue;
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// A stock implementation of MessageLoopProxy that is created and managed by a
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// MessageLoop. For now a MessageLoopProxyImpl can only be created as part of a
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// MessageLoop.
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class BASE_EXPORT MessageLoopProxyImpl : public MessageLoopProxy {
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public:
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explicit MessageLoopProxyImpl(
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scoped_refptr<IncomingTaskQueue> incoming_queue);
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// Initialize this message loop proxy on the current thread.
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void BindToCurrentThread();
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// MessageLoopProxy implementation
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bool PostDelayedTask(const tracked_objects::Location& from_here,
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const base::Closure& task,
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base::TimeDelta delay) override;
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bool PostNonNestableDelayedTask(const tracked_objects::Location& from_here,
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const base::Closure& task,
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base::TimeDelta delay) override;
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bool RunsTasksOnCurrentThread() const override;
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private:
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friend class RefCountedThreadSafe<MessageLoopProxyImpl>;
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~MessageLoopProxyImpl() override;
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// THe incoming queue receiving all posted tasks.
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scoped_refptr<IncomingTaskQueue> incoming_queue_;
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// ID of the thread |this| was created on. Could be accessed on multiple
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// threads, protected by |valid_thread_id_lock_|.
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PlatformThreadId valid_thread_id_;
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mutable Lock valid_thread_id_lock_;
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DISALLOW_COPY_AND_ASSIGN(MessageLoopProxyImpl);
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};
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} // namespace internal
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} // namespace base
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#endif // BASE_MESSAGE_LOOP_MESSAGE_LOOP_PROXY_IMPL_H_
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