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 explicit 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, WorkerThreadStartMode) OVERRIDE; 57 virtual void terminateWorkerContext() OVERRIDE; 58 virtual void postMessageToWorkerContext(PassRefPtr<SerializedScriptValue>, PassOwnPtr<MessagePortChannelArray>) OVERRIDE; 59 virtual bool hasPendingActivity() const OVERRIDE; 60 virtual void workerObjectDestroyed() OVERRIDE; 61#if ENABLE(INSPECTOR) 62 virtual void connectToInspector(WorkerContextProxy::PageInspector*) OVERRIDE; 63 virtual void disconnectFromInspector() OVERRIDE; 64 virtual void sendMessageToInspector(const String&) OVERRIDE; 65#endif 66 67 // Implementations of WorkerObjectProxy. 68 // (Only use these methods in the worker context thread.) 69 virtual void postMessageToWorkerObject(PassRefPtr<SerializedScriptValue>, PassOwnPtr<MessagePortChannelArray>) OVERRIDE; 70 virtual void postExceptionToWorkerObject(const String& errorMessage, int lineNumber, int columnNumber, const String& sourceURL) OVERRIDE; 71 virtual void postConsoleMessageToWorkerObject(MessageSource, MessageLevel, const String& message, int lineNumber, int columnNumber, const String& sourceURL) OVERRIDE; 72#if ENABLE(INSPECTOR) 73 virtual void postMessageToPageInspector(const String&) OVERRIDE; 74 virtual void updateInspectorStateCookie(const String&) OVERRIDE; 75#endif 76 virtual void confirmMessageFromWorkerObject(bool hasPendingActivity) OVERRIDE; 77 virtual void reportPendingActivity(bool hasPendingActivity) OVERRIDE; 78 virtual void workerContextClosed() OVERRIDE; 79 virtual void workerContextDestroyed() OVERRIDE; 80 81 // Implementation of WorkerLoaderProxy. 82 // These methods are called on different threads to schedule loading 83 // requests and to send callbacks back to WorkerContext. 84 virtual void postTaskToLoader(PassOwnPtr<ScriptExecutionContext::Task>) OVERRIDE; 85 virtual bool postTaskForModeToWorkerContext(PassOwnPtr<ScriptExecutionContext::Task>, const String& mode) OVERRIDE; 86 87 void workerThreadCreated(PassRefPtr<DedicatedWorkerThread>); 88 89 // Only use this method on the worker object thread. 90 bool askedToTerminate() const { return m_askedToTerminate; } 91 92 protected: 93 virtual ~WorkerMessagingProxy(); 94 95 private: 96 friend class MessageWorkerTask; 97 friend class PostMessageToPageInspectorTask; 98 friend class WorkerContextDestroyedTask; 99 friend class WorkerExceptionTask; 100 friend class WorkerThreadActivityReportTask; 101 102 void workerContextDestroyedInternal(); 103 static void workerObjectDestroyedInternal(ScriptExecutionContext*, WorkerMessagingProxy*); 104 void reportPendingActivityInternal(bool confirmingMessage, bool hasPendingActivity); 105 Worker* workerObject() const { return m_workerObject; } 106 107 RefPtr<ScriptExecutionContext> m_scriptExecutionContext; 108 Worker* m_workerObject; 109 bool m_mayBeDestroyed; 110 RefPtr<DedicatedWorkerThread> m_workerThread; 111 112 unsigned m_unconfirmedMessageCount; // Unconfirmed messages from worker object to worker thread. 113 bool m_workerThreadHadPendingActivity; // The latest confirmation from worker thread reported that it was still active. 114 115 bool m_askedToTerminate; 116 117 Vector<OwnPtr<ScriptExecutionContext::Task> > m_queuedEarlyTasks; // Tasks are queued here until there's a thread object created. 118#if ENABLE(INSPECTOR) 119 WorkerContextProxy::PageInspector* m_pageInspector; 120#endif 121 }; 122 123} // namespace WebCore 124 125#endif // ENABLE(WORKERS) 126 127#endif // WorkerMessagingProxy_h 128