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 : FastAllocBase {
NewThreadContextWTF::NewThreadContext34 NewThreadContext(ThreadFunction entryPoint, void* data, const char* name)
35 : entryPoint(entryPoint)
36 , data(data)
37 , name(name)
38 {
39 }
40
41 ThreadFunction entryPoint;
42 void* data;
43 const char* name;
44
45 Mutex creationMutex;
46 };
47
threadEntryPoint(void * contextData)48 static void* threadEntryPoint(void* contextData)
49 {
50 NewThreadContext* context = reinterpret_cast<NewThreadContext*>(contextData);
51
52 setThreadNameInternal(context->name);
53
54 // Block until our creating thread has completed any extra setup work
55 {
56 MutexLocker locker(context->creationMutex);
57 }
58
59 // Grab the info that we need out of the context, then deallocate it.
60 ThreadFunction entryPoint = context->entryPoint;
61 void* data = context->data;
62 delete context;
63
64 return entryPoint(data);
65 }
66
createThread(ThreadFunction entryPoint,void * data,const char * name)67 ThreadIdentifier createThread(ThreadFunction entryPoint, void* data, const char* name)
68 {
69 // Visual Studio has a 31-character limit on thread names. Longer names will
70 // be truncated silently, but we'd like callers to know about the limit.
71 #if !LOG_DISABLED
72 if (strlen(name) > 31)
73 LOG_ERROR("Thread name \"%s\" is longer than 31 characters and will be truncated by Visual Studio", name);
74 #endif
75
76 NewThreadContext* context = new NewThreadContext(entryPoint, data, name);
77
78 // Prevent the thread body from executing until we've established the thread identifier
79 MutexLocker locker(context->creationMutex);
80
81 return createThreadInternal(threadEntryPoint, context, name);
82 }
83
84 #if PLATFORM(MAC) || PLATFORM(WIN)
85
86 // This function is deprecated but needs to be kept around for backward
87 // compatibility. Use the 3-argument version of createThread above.
88
89 ThreadIdentifier createThread(ThreadFunction entryPoint, void* data);
90
createThread(ThreadFunction entryPoint,void * data)91 ThreadIdentifier createThread(ThreadFunction entryPoint, void* data)
92 {
93 return createThread(entryPoint, data, 0);
94 }
95 #endif
96
97 } // namespace WTF
98