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 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 Worker_h 28 #define Worker_h 29 30 #include "core/dom/ActiveDOMObject.h" 31 #include "core/dom/MessagePort.h" 32 #include "core/events/EventListener.h" 33 #include "core/events/EventTarget.h" 34 #include "core/workers/AbstractWorker.h" 35 #include "core/workers/WorkerScriptLoaderClient.h" 36 #include "platform/heap/Handle.h" 37 #include "wtf/Forward.h" 38 #include "wtf/PassRefPtr.h" 39 #include "wtf/RefPtr.h" 40 #include "wtf/text/AtomicStringHash.h" 41 42 namespace WebCore { 43 44 class ExceptionState; 45 class ExecutionContext; 46 class WorkerGlobalScopeProxy; 47 class WorkerScriptLoader; 48 49 class Worker FINAL : public AbstractWorker, public ScriptWrappable, private WorkerScriptLoaderClient { 50 public: 51 static PassRefPtrWillBeRawPtr<Worker> create(ExecutionContext*, const String& url, ExceptionState&); 52 virtual ~Worker(); 53 54 virtual const AtomicString& interfaceName() const OVERRIDE; 55 56 void postMessage(PassRefPtr<SerializedScriptValue> message, const MessagePortArray*, ExceptionState&); 57 58 void terminate(); 59 60 virtual void stop() OVERRIDE; 61 virtual bool hasPendingActivity() const OVERRIDE; 62 63 DEFINE_ATTRIBUTE_EVENT_LISTENER(message); 64 65 virtual void trace(Visitor*) OVERRIDE; 66 67 private: 68 explicit Worker(ExecutionContext*); 69 70 // WorkerScriptLoaderClient callbacks 71 virtual void didReceiveResponse(unsigned long identifier, const ResourceResponse&) OVERRIDE; 72 virtual void notifyFinished() OVERRIDE; 73 74 RefPtr<WorkerScriptLoader> m_scriptLoader; 75 WorkerGlobalScopeProxy* m_contextProxy; // The proxy outlives the worker to perform thread shutdown. 76 }; 77 78 } // namespace WebCore 79 80 #endif // Worker_h 81