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/*
* Copyright (C) 2008 Apple 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 COMPUTER, INC. ``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 COMPUTER, INC. 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 WorkerMessagingProxy_h
#define WorkerMessagingProxy_h
#if ENABLE(WORKERS)
#include "ScriptExecutionContext.h"
#include <wtf/Noncopyable.h>
#include <wtf/PassRefPtr.h>
#include <wtf/RefPtr.h>
#include <wtf/Vector.h>
namespace WebCore {
class ScriptExecutionContext;
class String;
class Worker;
class WorkerTask;
class WorkerThread;
class WorkerMessagingProxy : Noncopyable {
public:
WorkerMessagingProxy(PassRefPtr<ScriptExecutionContext>, Worker*);
void postMessageToWorkerObject(const String& message);
void postMessageToWorkerContext(const String& message);
void postTaskToParentContext(PassRefPtr<ScriptExecutionContext::Task>);
void postWorkerException(const String& errorMessage, int lineNumber, const String& sourceURL);
void workerThreadCreated(PassRefPtr<WorkerThread>);
void workerObjectDestroyed();
void workerContextDestroyed();
void terminate();
void confirmWorkerThreadMessage(bool hasPendingActivity);
void reportWorkerThreadActivity(bool hasPendingActivity);
bool workerThreadHasPendingActivity() const;
private:
friend class GenericWorkerTaskBase;
friend class MessageWorkerTask;
friend class WorkerContextDestroyedTask;
friend class WorkerExceptionTask;
friend class WorkerThreadActivityReportTask;
~WorkerMessagingProxy();
void workerContextDestroyedInternal();
void reportWorkerThreadActivityInternal(bool confirmingMessage, bool hasPendingActivity);
Worker* workerObject() const { return m_workerObject; }
bool askedToTerminate() { return m_askedToTerminate; }
RefPtr<ScriptExecutionContext> m_scriptExecutionContext;
Worker* m_workerObject;
RefPtr<WorkerThread> m_workerThread;
unsigned m_unconfirmedMessageCount; // Unconfirmed messages from worker object to worker thread.
bool m_workerThreadHadPendingActivity; // The latest confirmation from worker thread reported that it was still active.
bool m_askedToTerminate;
Vector<RefPtr<WorkerTask> > m_queuedEarlyTasks; // Tasks are queued here until there's a thread object created.
};
} // namespace WebCore
#endif // ENABLE(WORKERS)
#endif // WorkerMessagingProxy_h
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