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/*
* Copyright (C) 2011 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef CCThread_h
#define CCThread_h
#include <wtf/MessageQueue.h>
#include <wtf/PassOwnPtr.h>
#include <wtf/RefCounted.h>
#include <wtf/Threading.h>
namespace WebCore {
// The CCThread singleton owns the compositor thread and provides
// basic infrastructure for messaging between the two threads.
class CCThread {
public:
static PassOwnPtr<CCThread> create()
{
return adoptPtr(new CCThread());
}
virtual ~CCThread();
class Task {
WTF_MAKE_NONCOPYABLE(Task);
public:
virtual ~Task() { }
virtual void performTask() = 0;
void* instance() const { return m_instance; }
protected:
Task(void* instance) : m_instance(instance) { }
void* m_instance;
};
void postTask(PassOwnPtr<Task>); // Executes the task on context's thread asynchronously.
WTF::ThreadIdentifier threadID() const { return m_threadID; }
protected:
explicit CCThread();
static void* compositorThreadStart(void*);
void* runLoop();
WTF::ThreadIdentifier m_threadID;
MessageQueue<Task> m_queue;
Mutex m_threadCreationMutex;
};
}
#endif
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