1 /*
2 * Copyright (C) 2008 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 namespace WTF {
30
31 struct NewThreadContext {
NewThreadContextWTF::NewThreadContext32 NewThreadContext(ThreadFunction entryPoint, void* data)
33 : entryPoint(entryPoint)
34 , data(data)
35 { }
36
37 ThreadFunction entryPoint;
38 void* data;
39
40 Mutex creationMutex;
41 };
42
threadEntryPoint(void * contextData)43 static void* threadEntryPoint(void* contextData)
44 {
45 NewThreadContext* context = reinterpret_cast<NewThreadContext*>(contextData);
46
47 // Block until our creating thread has completed any extra setup work
48 {
49 MutexLocker locker(context->creationMutex);
50 }
51
52 // Grab the info that we need out of the context, then deallocate it.
53 ThreadFunction entryPoint = context->entryPoint;
54 void* data = context->data;
55 delete context;
56
57 return entryPoint(data);
58 }
59
createThread(ThreadFunction entryPoint,void * data,const char * name)60 ThreadIdentifier createThread(ThreadFunction entryPoint, void* data, const char* name)
61 {
62 NewThreadContext* context = new NewThreadContext(entryPoint, data);
63
64 // Prevent the thread body from executing until we've established the thread identifier
65 MutexLocker locker(context->creationMutex);
66
67 return createThreadInternal(threadEntryPoint, context, name);
68 }
69
70 #if PLATFORM(MAC) || PLATFORM(WIN)
71
72 // This function is deprecated but needs to be kept around for backward
73 // compatibility. Use the 3-argument version of createThread above.
74
75 ThreadIdentifier createThread(ThreadFunction entryPoint, void* data);
76
createThread(ThreadFunction entryPoint,void * data)77 ThreadIdentifier createThread(ThreadFunction entryPoint, void* data)
78 {
79 return createThread(entryPoint, data, 0);
80 }
81 #endif
82
83 } // namespace WTF
84