1/* 2 * Copyright (C) 2008, 2010 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 Worker_h 28#define Worker_h 29 30#include "AbstractWorker.h" 31#include "ActiveDOMObject.h" 32#include "EventListener.h" 33#include "EventNames.h" 34#include "EventTarget.h" 35#include "MessagePort.h" 36#include "WorkerScriptLoaderClient.h" 37#include <wtf/Forward.h> 38#include <wtf/PassRefPtr.h> 39#include <wtf/RefPtr.h> 40#include <wtf/text/AtomicStringHash.h> 41 42namespace WebCore { 43 44 class ScriptExecutionContext; 45 class WorkerGlobalScopeProxy; 46 class WorkerScriptLoader; 47 48 typedef int ExceptionCode; 49 50 class Worker final : public AbstractWorker, private WorkerScriptLoaderClient { 51 public: 52 static PassRefPtr<Worker> create(ScriptExecutionContext&, const String& url, ExceptionCode&); 53 virtual ~Worker(); 54 55 virtual EventTargetInterface eventTargetInterface() const override { return WorkerEventTargetInterfaceType; } 56 57 void postMessage(PassRefPtr<SerializedScriptValue> message, const MessagePortArray*, ExceptionCode&); 58 // Needed for Objective-C bindings (see bug 28774). 59 void postMessage(PassRefPtr<SerializedScriptValue> message, MessagePort*, ExceptionCode&); 60 61 void terminate(); 62 63 virtual bool canSuspend() const override; 64 virtual void stop() override; 65 virtual bool hasPendingActivity() const override; 66 67 DEFINE_ATTRIBUTE_EVENT_LISTENER(message); 68 69 private: 70 explicit Worker(ScriptExecutionContext&); 71 72 void notifyNetworkStateChange(bool isOnline); 73 74 // WorkerScriptLoaderClient callbacks 75 virtual void didReceiveResponse(unsigned long identifier, const ResourceResponse&) override; 76 virtual void notifyFinished() override; 77 78 friend void networkStateChanged(bool isOnLine); 79 80 RefPtr<WorkerScriptLoader> m_scriptLoader; 81 WorkerGlobalScopeProxy* m_contextProxy; // The proxy outlives the worker to perform thread shutdown. 82 }; 83 84} // namespace WebCore 85 86#endif // Worker_h 87