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#if ENABLE(WORKERS) 31 32#include "ContentSecurityPolicy.h" 33#include "GroupSettings.h" 34#include "WorkerRunLoop.h" 35#include <wtf/Forward.h> 36#include <wtf/OwnPtr.h> 37#include <wtf/PassRefPtr.h> 38#include <wtf/RefCounted.h> 39 40namespace WebCore { 41 42 class KURL; 43 class NotificationClient; 44 class SecurityOrigin; 45 class WorkerContext; 46 class WorkerLoaderProxy; 47 class WorkerReportingProxy; 48 struct WorkerThreadStartupData; 49 50 enum WorkerThreadStartMode { DontPauseWorkerContextOnStart, PauseWorkerContextOnStart }; 51 52 class WorkerThread : public RefCounted<WorkerThread> { 53 public: 54 virtual ~WorkerThread(); 55 56 bool start(); 57 void stop(); 58 59 ThreadIdentifier threadID() const { return m_threadID; } 60 WorkerRunLoop& runLoop() { return m_runLoop; } 61 WorkerLoaderProxy& workerLoaderProxy() const { return m_workerLoaderProxy; } 62 WorkerReportingProxy& workerReportingProxy() const { return m_workerReportingProxy; } 63 64 // Number of active worker threads. 65 static unsigned workerThreadCount(); 66 static void releaseFastMallocFreeMemoryInAllThreads(); 67 68#if ENABLE(NOTIFICATIONS) || ENABLE(LEGACY_NOTIFICATIONS) 69 NotificationClient* getNotificationClient() { return m_notificationClient; } 70 void setNotificationClient(NotificationClient* client) { m_notificationClient = client; } 71#endif 72 73 protected: 74 WorkerThread(const KURL&, const String& userAgent, const GroupSettings*, const String& sourceCode, WorkerLoaderProxy&, WorkerReportingProxy&, WorkerThreadStartMode, const String& contentSecurityPolicy, ContentSecurityPolicy::HeaderType, const SecurityOrigin* topOrigin); 75 76 // Factory method for creating a new worker context for the thread. 77 virtual PassRefPtr<WorkerContext> createWorkerContext(const KURL&, const String& userAgent, PassOwnPtr<GroupSettings>, const String& contentSecurityPolicy, ContentSecurityPolicy::HeaderType, PassRefPtr<SecurityOrigin> topOrigin) = 0; 78 79 // Executes the event loop for the worker thread. Derived classes can override to perform actions before/after entering the event loop. 80 virtual void runEventLoop(); 81 82 WorkerContext* workerContext() { return m_workerContext.get(); } 83 84 private: 85 // Static function executed as the core routine on the new thread. Passed a pointer to a WorkerThread object. 86 static void workerThreadStart(void*); 87 void workerThread(); 88 89 ThreadIdentifier m_threadID; 90 WorkerRunLoop m_runLoop; 91 WorkerLoaderProxy& m_workerLoaderProxy; 92 WorkerReportingProxy& m_workerReportingProxy; 93 94 RefPtr<WorkerContext> m_workerContext; 95 Mutex m_threadCreationMutex; 96 97 OwnPtr<WorkerThreadStartupData> m_startupData; 98 99#if ENABLE(NOTIFICATIONS) || ENABLE(LEGACY_NOTIFICATIONS) 100 NotificationClient* m_notificationClient; 101#endif 102 }; 103 104} // namespace WebCore 105 106#endif // ENABLE(WORKERS) 107 108#endif // WorkerThread_h 109 110