1/* 2 * Copyright (C) 2008 Apple Inc. All Rights Reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 * 25 */ 26 27#ifndef WorkerMessagingProxy_h 28#define WorkerMessagingProxy_h 29 30#if ENABLE(WORKERS) 31 32#include "ScriptExecutionContext.h" 33#include "WorkerContextProxy.h" 34#include "WorkerLoaderProxy.h" 35#include "WorkerObjectProxy.h" 36#include <wtf/Forward.h> 37#include <wtf/Noncopyable.h> 38#include <wtf/PassOwnPtr.h> 39#include <wtf/PassRefPtr.h> 40#include <wtf/RefPtr.h> 41#include <wtf/Vector.h> 42 43namespace WebCore { 44 45 class DedicatedWorkerThread; 46 class ScriptExecutionContext; 47 class Worker; 48 49 class WorkerMessagingProxy : public WorkerContextProxy, public WorkerObjectProxy, public WorkerLoaderProxy { 50 WTF_MAKE_NONCOPYABLE(WorkerMessagingProxy); WTF_MAKE_FAST_ALLOCATED; 51 public: 52 WorkerMessagingProxy(Worker*); 53 54 // Implementations of WorkerContextProxy. 55 // (Only use these methods in the worker object thread.) 56 virtual void startWorkerContext(const KURL& scriptURL, const String& userAgent, const String& sourceCode); 57 virtual void terminateWorkerContext(); 58 virtual void postMessageToWorkerContext(PassRefPtr<SerializedScriptValue>, PassOwnPtr<MessagePortChannelArray>); 59 virtual bool hasPendingActivity() const; 60 virtual void workerObjectDestroyed(); 61 62 // Implementations of WorkerObjectProxy. 63 // (Only use these methods in the worker context thread.) 64 virtual void postMessageToWorkerObject(PassRefPtr<SerializedScriptValue>, PassOwnPtr<MessagePortChannelArray>); 65 virtual void postExceptionToWorkerObject(const String& errorMessage, int lineNumber, const String& sourceURL); 66 virtual void postConsoleMessageToWorkerObject(MessageSource, MessageType, MessageLevel, const String& message, int lineNumber, const String& sourceURL); 67 virtual void confirmMessageFromWorkerObject(bool hasPendingActivity); 68 virtual void reportPendingActivity(bool hasPendingActivity); 69 virtual void workerContextClosed(); 70 virtual void workerContextDestroyed(); 71 72 // Implementation of WorkerLoaderProxy. 73 // These methods are called on different threads to schedule loading 74 // requests and to send callbacks back to WorkerContext. 75 virtual void postTaskToLoader(PassOwnPtr<ScriptExecutionContext::Task>); 76 virtual void postTaskForModeToWorkerContext(PassOwnPtr<ScriptExecutionContext::Task>, const String& mode); 77 78 void workerThreadCreated(PassRefPtr<DedicatedWorkerThread>); 79 80 // Only use this method on the worker object thread. 81 bool askedToTerminate() const { return m_askedToTerminate; } 82 83 private: 84 friend class MessageWorkerTask; 85 friend class WorkerContextDestroyedTask; 86 friend class WorkerExceptionTask; 87 friend class WorkerThreadActivityReportTask; 88 89 virtual ~WorkerMessagingProxy(); 90 91 void workerContextDestroyedInternal(); 92 void reportPendingActivityInternal(bool confirmingMessage, bool hasPendingActivity); 93 Worker* workerObject() const { return m_workerObject; } 94 95 RefPtr<ScriptExecutionContext> m_scriptExecutionContext; 96 Worker* m_workerObject; 97 RefPtr<DedicatedWorkerThread> m_workerThread; 98 99 unsigned m_unconfirmedMessageCount; // Unconfirmed messages from worker object to worker thread. 100 bool m_workerThreadHadPendingActivity; // The latest confirmation from worker thread reported that it was still active. 101 102 bool m_askedToTerminate; 103 104 Vector<OwnPtr<ScriptExecutionContext::Task> > m_queuedEarlyTasks; // Tasks are queued here until there's a thread object created. 105 }; 106 107} // namespace WebCore 108 109#endif // ENABLE(WORKERS) 110 111#endif // WorkerMessagingProxy_h 112