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 WorkerThread_h 28 #define WorkerThread_h 29 30 #include "core/frame/csp/ContentSecurityPolicy.h" 31 #include "core/workers/WorkerRunLoop.h" 32 #include "platform/weborigin/SecurityOrigin.h" 33 #include "wtf/Forward.h" 34 #include "wtf/OwnPtr.h" 35 #include "wtf/PassRefPtr.h" 36 #include "wtf/RefCounted.h" 37 38 namespace blink { 39 class WebWaitableEvent; 40 } 41 42 namespace WebCore { 43 44 class KURL; 45 class NotificationClient; 46 class WorkerGlobalScope; 47 class WorkerLoaderProxy; 48 class WorkerReportingProxy; 49 class WorkerThreadStartupData; 50 51 enum WorkerThreadStartMode { DontPauseWorkerGlobalScopeOnStart, PauseWorkerGlobalScopeOnStart }; 52 53 class WorkerThread : public RefCounted<WorkerThread> { 54 public: 55 virtual ~WorkerThread(); 56 57 bool start(); 58 void stop(); 59 60 // Can be used to wait for this worker thread to shut down. 61 // (This is signalled on the main thread, so it's assumed to be waited on the worker context thread) shutdownEvent()62 blink::WebWaitableEvent* shutdownEvent() { return m_shutdownEvent.get(); } 63 64 bool isCurrentThread() const; runLoop()65 WorkerRunLoop& runLoop() { return m_runLoop; } workerLoaderProxy()66 WorkerLoaderProxy& workerLoaderProxy() const { return m_workerLoaderProxy; } workerReportingProxy()67 WorkerReportingProxy& workerReportingProxy() const { return m_workerReportingProxy; } 68 69 // Number of active worker threads. 70 static unsigned workerThreadCount(); 71 getNotificationClient()72 NotificationClient* getNotificationClient() { return m_notificationClient; } setNotificationClient(NotificationClient * client)73 void setNotificationClient(NotificationClient* client) { m_notificationClient = client; } 74 75 protected: 76 WorkerThread(WorkerLoaderProxy&, WorkerReportingProxy&, PassOwnPtrWillBeRawPtr<WorkerThreadStartupData>); 77 78 // Factory method for creating a new worker context for the thread. 79 virtual PassRefPtrWillBeRawPtr<WorkerGlobalScope> createWorkerGlobalScope(PassOwnPtrWillBeRawPtr<WorkerThreadStartupData>) = 0; 80 81 // Executes the event loop for the worker thread. Derived classes can override to perform actions before/after entering the event loop. 82 virtual void runEventLoop(); 83 workerGlobalScope()84 WorkerGlobalScope* workerGlobalScope() { return m_workerGlobalScope.get(); } 85 86 private: 87 // Static function executed as the core routine on the new thread. Passed a pointer to a WorkerThread object. 88 static void workerThreadStart(void*); 89 90 void workerThread(); 91 92 ThreadIdentifier m_threadID; 93 WorkerRunLoop m_runLoop; 94 WorkerLoaderProxy& m_workerLoaderProxy; 95 WorkerReportingProxy& m_workerReportingProxy; 96 97 RefPtrWillBePersistent<WorkerGlobalScope> m_workerGlobalScope; 98 Mutex m_threadCreationMutex; 99 100 OwnPtrWillBePersistent<WorkerThreadStartupData> m_startupData; 101 102 NotificationClient* m_notificationClient; 103 104 // Used to signal thread shutdown. 105 OwnPtr<blink::WebWaitableEvent> m_shutdownEvent; 106 }; 107 108 } // namespace WebCore 109 110 #endif // WorkerThread_h 111