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 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 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 "ScriptExecutionContext.h" 31#include "WorkerGlobalScopeProxy.h" 32#include "WorkerLoaderProxy.h" 33#include "WorkerObjectProxy.h" 34#include <memory> 35#include <wtf/Forward.h> 36#include <wtf/Noncopyable.h> 37#include <wtf/PassRefPtr.h> 38#include <wtf/RefPtr.h> 39#include <wtf/Vector.h> 40 41namespace WebCore { 42 43 class DedicatedWorkerThread; 44 class ScriptExecutionContext; 45 class Worker; 46 47 class WorkerMessagingProxy : public WorkerGlobalScopeProxy, public WorkerObjectProxy, public WorkerLoaderProxy { 48 WTF_MAKE_NONCOPYABLE(WorkerMessagingProxy); WTF_MAKE_FAST_ALLOCATED; 49 public: 50 explicit WorkerMessagingProxy(Worker*); 51 52 // Implementations of WorkerGlobalScopeProxy. 53 // (Only use these methods in the worker object thread.) 54 virtual void startWorkerGlobalScope(const URL& scriptURL, const String& userAgent, const String& sourceCode, WorkerThreadStartMode) override; 55 virtual void terminateWorkerGlobalScope() override; 56 virtual void postMessageToWorkerGlobalScope(PassRefPtr<SerializedScriptValue>, std::unique_ptr<MessagePortChannelArray>) override; 57 virtual bool hasPendingActivity() const override; 58 virtual void workerObjectDestroyed() override; 59 virtual void notifyNetworkStateChange(bool isOnline) override; 60#if ENABLE(INSPECTOR) 61 virtual void connectToInspector(WorkerGlobalScopeProxy::PageInspector*) override; 62 virtual void disconnectFromInspector() override; 63 virtual void sendMessageToInspector(const String&) override; 64#endif 65 66 // Implementations of WorkerObjectProxy. 67 // (Only use these methods in the worker context thread.) 68 virtual void postMessageToWorkerObject(PassRefPtr<SerializedScriptValue>, std::unique_ptr<MessagePortChannelArray>) override; 69 virtual void postExceptionToWorkerObject(const String& errorMessage, int lineNumber, int columnNumber, const String& sourceURL) override; 70 virtual void postConsoleMessageToWorkerObject(MessageSource, MessageLevel, const String& message, int lineNumber, int columnNumber, const String& sourceURL) override; 71#if ENABLE(INSPECTOR) 72 virtual void postMessageToPageInspector(const String&) override; 73#endif 74 virtual void confirmMessageFromWorkerObject(bool hasPendingActivity) override; 75 virtual void reportPendingActivity(bool hasPendingActivity) override; 76 virtual void workerGlobalScopeClosed() override; 77 virtual void workerGlobalScopeDestroyed() override; 78 79 // Implementation of WorkerLoaderProxy. 80 // These methods are called on different threads to schedule loading 81 // requests and to send callbacks back to WorkerGlobalScope. 82 virtual void postTaskToLoader(ScriptExecutionContext::Task) override; 83 virtual bool postTaskForModeToWorkerGlobalScope(ScriptExecutionContext::Task, const String& mode) override; 84 85 void workerThreadCreated(PassRefPtr<DedicatedWorkerThread>); 86 87 // Only use this method on the worker object thread. 88 bool askedToTerminate() const { return m_askedToTerminate; } 89 90 protected: 91 virtual ~WorkerMessagingProxy(); 92 93 private: 94 friend class MessageWorkerTask; 95 friend class PostMessageToPageInspectorTask; 96 friend class WorkerGlobalScopeDestroyedTask; 97 friend class WorkerExceptionTask; 98 friend class WorkerThreadActivityReportTask; 99 100 void workerGlobalScopeDestroyedInternal(); 101 void reportPendingActivityInternal(bool confirmingMessage, bool hasPendingActivity); 102 Worker* workerObject() const { return m_workerObject; } 103 104 RefPtr<ScriptExecutionContext> m_scriptExecutionContext; 105 Worker* m_workerObject; 106 bool m_mayBeDestroyed; 107 RefPtr<DedicatedWorkerThread> m_workerThread; 108 109 unsigned m_unconfirmedMessageCount; // Unconfirmed messages from worker object to worker thread. 110 bool m_workerThreadHadPendingActivity; // The latest confirmation from worker thread reported that it was still active. 111 112 bool m_askedToTerminate; 113 114 Vector<std::unique_ptr<ScriptExecutionContext::Task>> m_queuedEarlyTasks; // Tasks are queued here until there's a thread object created. 115#if ENABLE(INSPECTOR) 116 WorkerGlobalScopeProxy::PageInspector* m_pageInspector; 117#endif 118 }; 119 120} // namespace WebCore 121 122#endif // WorkerMessagingProxy_h 123