1 /* 2 * Copyright (C) 2009 Google 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 are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef WorkerRunLoop_h 32 #define WorkerRunLoop_h 33 34 #if ENABLE(WORKERS) 35 36 #include "ScriptExecutionContext.h" 37 #include <wtf/MessageQueue.h> 38 #include <wtf/OwnPtr.h> 39 #include <wtf/PassOwnPtr.h> 40 41 namespace WebCore { 42 43 class ModePredicate; 44 class WorkerContext; 45 class WorkerSharedTimer; 46 47 class WorkerRunLoop { 48 public: 49 WorkerRunLoop(); 50 ~WorkerRunLoop(); 51 52 // Blocking call. Waits for tasks and timers, invokes the callbacks. 53 void run(WorkerContext*); 54 55 // Waits for a single task and returns. 56 MessageQueueWaitResult runInMode(WorkerContext*, const String& mode); 57 58 void terminate(); terminated()59 bool terminated() { return m_messageQueue.killed(); } 60 61 void postTask(PassOwnPtr<ScriptExecutionContext::Task>); 62 void postTaskForMode(PassOwnPtr<ScriptExecutionContext::Task>, const String& mode); 63 createUniqueId()64 unsigned long createUniqueId() { return ++m_uniqueId; } 65 66 static String defaultMode(); 67 68 class Task : public Noncopyable { 69 public: 70 static PassOwnPtr<Task> create(PassOwnPtr<ScriptExecutionContext::Task> task, const String& mode); ~Task()71 ~Task() { } mode()72 const String& mode() const { return m_mode; } 73 void performTask(ScriptExecutionContext* context); 74 75 private: 76 Task(PassOwnPtr<ScriptExecutionContext::Task> task, const String& mode); 77 78 OwnPtr<ScriptExecutionContext::Task> m_task; 79 String m_mode; 80 }; 81 82 private: 83 friend class RunLoopSetup; 84 MessageQueueWaitResult runInMode(WorkerContext*, const ModePredicate&); 85 86 MessageQueue<Task> m_messageQueue; 87 OwnPtr<WorkerSharedTimer> m_sharedTimer; 88 int m_nestedCount; 89 unsigned long m_uniqueId; 90 }; 91 92 } // namespace WebCore 93 94 #endif // ENABLE(WORKERS) 95 96 #endif // WorkerRunLoop_h 97