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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 WorkerThread_h
#define WorkerThread_h
#include "core/frame/csp/ContentSecurityPolicy.h"
#include "core/workers/WorkerRunLoop.h"
#include "platform/weborigin/SecurityOrigin.h"
#include "wtf/Forward.h"
#include "wtf/OwnPtr.h"
#include "wtf/PassRefPtr.h"
#include "wtf/RefCounted.h"
namespace blink {
class WebWaitableEvent;
}
namespace WebCore {
class KURL;
class NotificationClient;
class WorkerGlobalScope;
class WorkerLoaderProxy;
class WorkerReportingProxy;
class WorkerThreadStartupData;
enum WorkerThreadStartMode { DontPauseWorkerGlobalScopeOnStart, PauseWorkerGlobalScopeOnStart };
class WorkerThread : public RefCounted<WorkerThread> {
public:
virtual ~WorkerThread();
bool start();
void stop();
// Can be used to wait for this worker thread to shut down.
// (This is signalled on the main thread, so it's assumed to be waited on the worker context thread)
blink::WebWaitableEvent* shutdownEvent() { return m_shutdownEvent.get(); }
bool isCurrentThread() const;
WorkerRunLoop& runLoop() { return m_runLoop; }
WorkerLoaderProxy& workerLoaderProxy() const { return m_workerLoaderProxy; }
WorkerReportingProxy& workerReportingProxy() const { return m_workerReportingProxy; }
// Number of active worker threads.
static unsigned workerThreadCount();
NotificationClient* getNotificationClient() { return m_notificationClient; }
void setNotificationClient(NotificationClient* client) { m_notificationClient = client; }
protected:
WorkerThread(WorkerLoaderProxy&, WorkerReportingProxy&, PassOwnPtrWillBeRawPtr<WorkerThreadStartupData>);
// Factory method for creating a new worker context for the thread.
virtual PassRefPtrWillBeRawPtr<WorkerGlobalScope> createWorkerGlobalScope(PassOwnPtrWillBeRawPtr<WorkerThreadStartupData>) = 0;
// Executes the event loop for the worker thread. Derived classes can override to perform actions before/after entering the event loop.
virtual void runEventLoop();
WorkerGlobalScope* workerGlobalScope() { return m_workerGlobalScope.get(); }
private:
// Static function executed as the core routine on the new thread. Passed a pointer to a WorkerThread object.
static void workerThreadStart(void*);
void workerThread();
ThreadIdentifier m_threadID;
WorkerRunLoop m_runLoop;
WorkerLoaderProxy& m_workerLoaderProxy;
WorkerReportingProxy& m_workerReportingProxy;
RefPtrWillBePersistent<WorkerGlobalScope> m_workerGlobalScope;
Mutex m_threadCreationMutex;
OwnPtrWillBePersistent<WorkerThreadStartupData> m_startupData;
NotificationClient* m_notificationClient;
// Used to signal thread shutdown.
OwnPtr<blink::WebWaitableEvent> m_shutdownEvent;
};
} // namespace WebCore
#endif // WorkerThread_h
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