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 #include "core/dom/ExecutionContext.h" 31 #include "core/workers/WorkerGlobalScopeProxy.h" 32 #include "core/workers/WorkerLoaderProxy.h" 33 #include "wtf/Forward.h" 34 #include "wtf/Noncopyable.h" 35 #include "wtf/PassOwnPtr.h" 36 #include "wtf/PassRefPtr.h" 37 #include "wtf/RefPtr.h" 38 #include "wtf/Vector.h" 39 40 namespace WebCore { 41 42 class WorkerObjectProxy; 43 class DedicatedWorkerThread; 44 class ExecutionContext; 45 class Worker; 46 class WorkerClients; 47 48 class WorkerMessagingProxy FINAL : public WorkerGlobalScopeProxy, public WorkerLoaderProxy { 49 WTF_MAKE_NONCOPYABLE(WorkerMessagingProxy); WTF_MAKE_FAST_ALLOCATED; 50 public: 51 WorkerMessagingProxy(Worker*, PassOwnPtrWillBeRawPtr<WorkerClients>); 52 53 // Implementations of WorkerGlobalScopeProxy. 54 // (Only use these methods in the worker object thread.) 55 virtual void startWorkerGlobalScope(const KURL& scriptURL, const String& userAgent, const String& sourceCode, WorkerThreadStartMode) OVERRIDE; 56 virtual void terminateWorkerGlobalScope() OVERRIDE; 57 virtual void postMessageToWorkerGlobalScope(PassRefPtr<SerializedScriptValue>, PassOwnPtr<MessagePortChannelArray>) OVERRIDE; 58 virtual bool hasPendingActivity() const OVERRIDE; 59 virtual void workerObjectDestroyed() OVERRIDE; 60 virtual void connectToInspector(WorkerGlobalScopeProxy::PageInspector*) OVERRIDE; 61 virtual void disconnectFromInspector() OVERRIDE; 62 virtual void sendMessageToInspector(const String&) OVERRIDE; 63 64 // These methods come from worker context thread via WorkerObjectProxy 65 // and are called on the worker object thread (e.g. main thread). 66 void postMessageToWorkerObject(PassRefPtr<SerializedScriptValue>, PassOwnPtr<MessagePortChannelArray>); 67 void reportException(const String& errorMessage, int lineNumber, int columnNumber, const String& sourceURL); 68 void reportConsoleMessage(MessageSource, MessageLevel, const String& message, int lineNumber, const String& sourceURL); 69 void postMessageToPageInspector(const String&); 70 void confirmMessageFromWorkerObject(bool hasPendingActivity); 71 void reportPendingActivity(bool hasPendingActivity); 72 void workerGlobalScopeClosed(); 73 void workerGlobalScopeDestroyed(); 74 75 // Implementation of WorkerLoaderProxy. 76 // These methods are called on different threads to schedule loading 77 // requests and to send callbacks back to WorkerGlobalScope. 78 virtual void postTaskToLoader(PassOwnPtr<ExecutionContextTask>) OVERRIDE; 79 virtual bool postTaskToWorkerGlobalScope(PassOwnPtr<ExecutionContextTask>) OVERRIDE; 80 81 void workerThreadCreated(PassRefPtr<DedicatedWorkerThread>); 82 83 protected: 84 virtual ~WorkerMessagingProxy(); 85 86 private: 87 static void workerObjectDestroyedInternal(ExecutionContext*, WorkerMessagingProxy*); 88 89 RefPtrWillBePersistent<ExecutionContext> m_executionContext; 90 OwnPtr<WorkerObjectProxy> m_workerObjectProxy; 91 Worker* m_workerObject; 92 bool m_mayBeDestroyed; 93 RefPtr<DedicatedWorkerThread> m_workerThread; 94 95 unsigned m_unconfirmedMessageCount; // Unconfirmed messages from worker object to worker thread. 96 bool m_workerThreadHadPendingActivity; // The latest confirmation from worker thread reported that it was still active. 97 98 bool m_askedToTerminate; 99 100 Vector<OwnPtr<ExecutionContextTask> > m_queuedEarlyTasks; // Tasks are queued here until there's a thread object created. 101 WorkerGlobalScopeProxy::PageInspector* m_pageInspector; 102 103 OwnPtrWillBePersistent<WorkerClients> m_workerClients; 104 }; 105 106 } // namespace WebCore 107 108 #endif // WorkerMessagingProxy_h 109