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/*
* Copyright (C) 2009 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.
* * 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.
* * 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 WorkerRunLoop_h
#define WorkerRunLoop_h
#include "core/dom/ExecutionContext.h"
#include "core/dom/ExecutionContextTask.h"
#include "public/platform/WebThread.h"
#include "wtf/Functional.h"
#include "wtf/MessageQueue.h"
#include "wtf/OwnPtr.h"
#include "wtf/PassOwnPtr.h"
namespace WebCore {
class WorkerGlobalScope;
class WorkerSharedTimer;
class WorkerRunLoop {
public:
WorkerRunLoop();
~WorkerRunLoop();
void setWorkerGlobalScope(WorkerGlobalScope*);
// Blocking call. Waits for tasks and timers, invokes the callbacks.
void run();
enum WaitMode { WaitForMessage, DontWaitForMessage };
// Waits for a single debugger task and returns.
MessageQueueWaitResult runDebuggerTask(WaitMode = WaitForMessage);
void terminate();
bool terminated() const { return m_messageQueue.killed(); }
WorkerGlobalScope* context() const { return m_context; }
// Returns true if the loop is still alive, false if it has been terminated.
bool postTask(PassOwnPtr<ExecutionContextTask>);
void postTaskAndTerminate(PassOwnPtr<ExecutionContextTask>);
// Returns true if the loop is still alive, false if it has been terminated.
bool postDebuggerTask(PassOwnPtr<ExecutionContextTask>);
private:
friend class RunLoopSetup;
MessageQueueWaitResult run(MessageQueue<blink::WebThread::Task>&, WaitMode);
// Runs any clean up tasks that are currently in the queue and returns.
// This should only be called when the context is closed or loop has been terminated.
void runCleanupTasks();
MessageQueue<blink::WebThread::Task> m_messageQueue;
MessageQueue<blink::WebThread::Task> m_debuggerMessageQueue;
OwnPtr<WorkerSharedTimer> m_sharedTimer;
WorkerGlobalScope* m_context;
int m_nestedCount;
};
} // namespace WebCore
#endif // WorkerRunLoop_h
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