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 #if ENABLE(WORKERS) 31 32 #include "AbstractWorker.h" 33 #include "ActiveDOMObject.h" 34 #include "EventListener.h" 35 #include "EventNames.h" 36 #include "EventTarget.h" 37 #include "MessagePort.h" 38 #include "WorkerScriptLoaderClient.h" 39 #include <wtf/Forward.h> 40 #include <wtf/OwnPtr.h> 41 #include <wtf/PassRefPtr.h> 42 #include <wtf/RefCounted.h> 43 #include <wtf/RefPtr.h> 44 #include <wtf/text/AtomicStringHash.h> 45 46 namespace WebCore { 47 48 class ScriptExecutionContext; 49 class WorkerContextProxy; 50 class WorkerScriptLoader; 51 52 typedef int ExceptionCode; 53 54 class Worker : public AbstractWorker, private WorkerScriptLoaderClient { 55 public: 56 static PassRefPtr<Worker> create(const String& url, ScriptExecutionContext*, ExceptionCode&); 57 virtual ~Worker(); 58 toWorker()59 virtual Worker* toWorker() { return this; } 60 61 void postMessage(PassRefPtr<SerializedScriptValue> message, ExceptionCode&); 62 void postMessage(PassRefPtr<SerializedScriptValue> message, const MessagePortArray*, ExceptionCode&); 63 // FIXME: remove this when we update the ObjC bindings (bug #28774). 64 void postMessage(PassRefPtr<SerializedScriptValue> message, MessagePort*, ExceptionCode&); 65 66 void terminate(); 67 68 virtual bool canSuspend() const; 69 virtual void stop(); 70 virtual bool hasPendingActivity() const; 71 72 DEFINE_ATTRIBUTE_EVENT_LISTENER(message); 73 74 private: 75 Worker(ScriptExecutionContext*); 76 77 virtual void notifyFinished(); 78 refEventTarget()79 virtual void refEventTarget() { ref(); } derefEventTarget()80 virtual void derefEventTarget() { deref(); } 81 82 OwnPtr<WorkerScriptLoader> m_scriptLoader; 83 WorkerContextProxy* m_contextProxy; // The proxy outlives the worker to perform thread shutdown. 84 }; 85 86 } // namespace WebCore 87 88 #endif // ENABLE(WORKERS) 89 90 #endif // Worker_h 91