/* * Copyright (C) 2007, 2008, 2010 Apple Inc. All rights reserved. * Copyright (C) 2007 Justin Haygood (jhaygood@reaktix.com) * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of * its contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * * Note: The implementations of InterlockedIncrement and InterlockedDecrement are based * on atomic_increment and atomic_exchange_and_add from the Boost C++ Library. The license * is virtually identical to the Apple license above but is included here for completeness. * * Boost Software License - Version 1.0 - August 17th, 2003 * * Permission is hereby granted, free of charge, to any person or organization * obtaining a copy of the software and accompanying documentation covered by * this license (the "Software") to use, reproduce, display, distribute, * execute, and transmit the Software, and to prepare derivative works of the * Software, and to permit third-parties to whom the Software is furnished to * do so, all subject to the following: * * The copyright notices in the Software and this entire statement, including * the above license grant, this restriction and the following disclaimer, * must be included in all copies of the Software, in whole or in part, and * all derivative works of the Software, unless such copies or derivative * works are solely in the form of machine-executable object code generated by * a source language processor. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT * SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE * FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. */ #ifndef Threading_h #define Threading_h #include "Platform.h" #include <stdint.h> #include <wtf/Assertions.h> #include <wtf/Atomics.h> #include <wtf/Locker.h> #include <wtf/MainThread.h> #include <wtf/Noncopyable.h> #include <wtf/ThreadSafeShared.h> #include <wtf/ThreadingPrimitives.h> // For portability, we do not use thread-safe statics natively supported by some compilers (e.g. gcc). #define AtomicallyInitializedStatic(T, name) \ WTF::lockAtomicallyInitializedStaticMutex(); \ static T name; \ WTF::unlockAtomicallyInitializedStaticMutex(); namespace WTF { typedef uint32_t ThreadIdentifier; typedef void* (*ThreadFunction)(void* argument); // This function must be called from the main thread. It is safe to call it repeatedly. // Darwin is an exception to this rule: it is OK to call it from any thread, the only // requirement is that the calls are not reentrant. void initializeThreading(); // Returns 0 if thread creation failed. // The thread name must be a literal since on some platforms it's passed in to the thread. ThreadIdentifier createThread(ThreadFunction, void*, const char* threadName); // Internal platform-specific createThread implementation. ThreadIdentifier createThreadInternal(ThreadFunction, void*, const char* threadName); // Called in the thread during initialization. // Helpful for platforms where the thread name must be set from within the thread. void initializeCurrentThreadInternal(const char* threadName); ThreadIdentifier currentThread(); int waitForThreadCompletion(ThreadIdentifier, void**); void detachThread(ThreadIdentifier); void lockAtomicallyInitializedStaticMutex(); void unlockAtomicallyInitializedStaticMutex(); } // namespace WTF using WTF::ThreadIdentifier; using WTF::createThread; using WTF::currentThread; using WTF::detachThread; using WTF::waitForThreadCompletion; #endif // Threading_h