1 /* 2 * Copyright (C) 2007, 2008, 2010 Apple Inc. All rights reserved. 3 * Copyright (C) 2007 Justin Haygood (jhaygood (at) reaktix.com) 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 15 * its contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 19 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 21 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #ifndef Threading_h 31 #define Threading_h 32 33 #include "wtf/WTFExport.h" 34 #include <stdint.h> 35 36 // For portability, we do not use thread-safe statics natively supported by some compilers (e.g. gcc). 37 #define AtomicallyInitializedStatic(T, name) \ 38 WTF::lockAtomicallyInitializedStaticMutex(); \ 39 static T name; \ 40 WTF::unlockAtomicallyInitializedStaticMutex(); 41 42 namespace WTF { 43 44 typedef uint32_t ThreadIdentifier; 45 typedef void (*ThreadFunction)(void* argument); 46 47 // Returns 0 if thread creation failed. 48 // The thread name must be a literal since on some platforms it's passed in to the thread. 49 WTF_EXPORT ThreadIdentifier createThread(ThreadFunction, void*, const char* threadName); 50 51 // Internal platform-specific createThread implementation. 52 WTF_EXPORT ThreadIdentifier createThreadInternal(ThreadFunction, void*, const char* threadName); 53 54 // Called in the thread during initialization. 55 // Helpful for platforms where the thread name must be set from within the thread. 56 WTF_EXPORT void initializeCurrentThreadInternal(const char* threadName); 57 58 WTF_EXPORT ThreadIdentifier currentThread(); 59 WTF_EXPORT int waitForThreadCompletion(ThreadIdentifier); 60 WTF_EXPORT void detachThread(ThreadIdentifier); 61 62 WTF_EXPORT void yield(); 63 64 WTF_EXPORT void lockAtomicallyInitializedStaticMutex(); 65 WTF_EXPORT void unlockAtomicallyInitializedStaticMutex(); 66 67 } // namespace WTF 68 69 using WTF::ThreadIdentifier; 70 using WTF::createThread; 71 using WTF::currentThread; 72 using WTF::detachThread; 73 using WTF::waitForThreadCompletion; 74 using WTF::yield; 75 76 #endif // Threading_h 77
