/*
* Copyright (C) 2013 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
* OWNER OR 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 MainThreadTaskRunner_h
#define MainThreadTaskRunner_h
#include "platform/Timer.h"
#include "wtf/FastAllocBase.h"
#include "wtf/Noncopyable.h"
#include "wtf/OwnPtr.h"
#include "wtf/PassOwnPtr.h"
#include "wtf/Vector.h"
#include "wtf/WeakPtr.h"
namespace WebCore {
class ExecutionContext;
class ExecutionContextTask;
class MainThreadTaskRunner {
WTF_MAKE_NONCOPYABLE(MainThreadTaskRunner);
WTF_MAKE_FAST_ALLOCATED;
public:
static PassOwnPtr<MainThreadTaskRunner> create(ExecutionContext*);
~MainThreadTaskRunner();
void postTask(PassOwnPtr<ExecutionContextTask>); // Executes the task on context's thread asynchronously.
void perform(PassOwnPtr<ExecutionContextTask>);
void suspend();
void resume();
private:
explicit MainThreadTaskRunner(ExecutionContext*);
void pendingTasksTimerFired(Timer<MainThreadTaskRunner>*);
ExecutionContext* m_context;
WeakPtrFactory<MainThreadTaskRunner> m_weakFactory;
Timer<MainThreadTaskRunner> m_pendingTasksTimer;
Vector<OwnPtr<ExecutionContextTask> > m_pendingTasks;
bool m_suspended;
};
inline PassOwnPtr<MainThreadTaskRunner> MainThreadTaskRunner::create(ExecutionContext* context)
{
return adoptPtr(new MainThreadTaskRunner(context));
}
} // namespace
#endif