1 /* 2 * Copyright (C) 2007, 2008, 2013 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 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 14 * its contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifndef TaskSynchronizer_h 30 #define TaskSynchronizer_h 31 32 #include "platform/PlatformExport.h" 33 #include "wtf/Noncopyable.h" 34 #include "wtf/Threading.h" 35 #include "wtf/ThreadingPrimitives.h" 36 37 namespace WebCore { 38 39 // TaskSynchronizer can be used to wait for task completion. 40 class PLATFORM_EXPORT TaskSynchronizer { 41 WTF_MAKE_NONCOPYABLE(TaskSynchronizer); 42 public: 43 TaskSynchronizer(); 44 45 // Called from a thread that waits for the task completion. 46 void waitForTaskCompletion(); 47 48 // Called from a thread that executes the task. 49 void taskCompleted(); 50 51 #ifndef NDEBUG 52 bool hasCheckedForTermination() const { return m_hasCheckedForTermination; } 53 void setHasCheckedForTermination() { m_hasCheckedForTermination = true; } 54 #endif 55 56 private: 57 void waitForTaskCompletionInternal(); 58 59 bool m_taskCompleted; 60 Mutex m_synchronousMutex; 61 ThreadCondition m_synchronousCondition; 62 #ifndef NDEBUG 63 bool m_hasCheckedForTermination; 64 #endif 65 }; 66 67 } // namespace WebCore 68 69 #endif // TaskSynchronizer_h 70
