1 /* 2 * Copyright (C) 2008, 2009 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 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #include "config.h" 27 #include "Threading.h" 28 29 #include <string.h> 30 31 namespace WTF { 32 33 struct NewThreadContext { 34 WTF_MAKE_FAST_ALLOCATED; 35 public: 36 NewThreadContext(ThreadFunction entryPoint, void* data, const char* name) 37 : entryPoint(entryPoint) 38 , data(data) 39 , name(name) 40 { 41 } 42 43 ThreadFunction entryPoint; 44 void* data; 45 const char* name; 46 47 Mutex creationMutex; 48 }; 49 50 static void* threadEntryPoint(void* contextData) 51 { 52 NewThreadContext* context = reinterpret_cast<NewThreadContext*>(contextData); 53 54 // Block until our creating thread has completed any extra setup work, including 55 // establishing ThreadIdentifier. 56 { 57 MutexLocker locker(context->creationMutex); 58 } 59 60 initializeCurrentThreadInternal(context->name); 61 62 // Grab the info that we need out of the context, then deallocate it. 63 ThreadFunction entryPoint = context->entryPoint; 64 void* data = context->data; 65 delete context; 66 67 return entryPoint(data); 68 } 69 70 ThreadIdentifier createThread(ThreadFunction entryPoint, void* data, const char* name) 71 { 72 // Visual Studio has a 31-character limit on thread names. Longer names will 73 // be truncated silently, but we'd like callers to know about the limit. 74 #if !LOG_DISABLED 75 if (strlen(name) > 31) 76 LOG_ERROR("Thread name \"%s\" is longer than 31 characters and will be truncated by Visual Studio", name); 77 #endif 78 79 NewThreadContext* context = new NewThreadContext(entryPoint, data, name); 80 81 // Prevent the thread body from executing until we've established the thread identifier. 82 MutexLocker locker(context->creationMutex); 83 84 return createThreadInternal(threadEntryPoint, context, name); 85 } 86 87 #if PLATFORM(MAC) || PLATFORM(WIN) 88 89 // This function is deprecated but needs to be kept around for backward 90 // compatibility. Use the 3-argument version of createThread above. 91 92 ThreadIdentifier createThread(ThreadFunction entryPoint, void* data); 93 94 ThreadIdentifier createThread(ThreadFunction entryPoint, void* data) 95 { 96 return createThread(entryPoint, data, 0); 97 } 98 #endif 99 100 } // namespace WTF 101
