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 "wtf/Threading.h"
28
29 #include "wtf/OwnPtr.h"
30 #include "wtf/PassOwnPtr.h"
31 #include "wtf/ThreadingPrimitives.h"
32 #include <string.h>
33
34 namespace WTF {
35
36 struct NewThreadContext {
37 public:
NewThreadContextWTF::NewThreadContext38 NewThreadContext(ThreadFunction entryPoint, void* data, const char* name)
39 : entryPoint(entryPoint)
40 , data(data)
41 , name(name)
42 {
43 }
44
45 ThreadFunction entryPoint;
46 void* data;
47 const char* name;
48
49 Mutex creationMutex;
50 };
51
threadEntryPoint(void * contextData)52 static void threadEntryPoint(void* contextData)
53 {
54 NewThreadContext* context = reinterpret_cast<NewThreadContext*>(contextData);
55
56 // Block until our creating thread has completed any extra setup work, including
57 // establishing ThreadIdentifier.
58 {
59 MutexLocker locker(context->creationMutex);
60 }
61
62 initializeCurrentThreadInternal(context->name);
63
64 // Grab the info that we need out of the context, then deallocate it.
65 ThreadFunction entryPoint = context->entryPoint;
66 void* data = context->data;
67 delete context;
68
69 entryPoint(data);
70 }
71
createThread(ThreadFunction entryPoint,void * data,const char * name)72 ThreadIdentifier createThread(ThreadFunction entryPoint, void* data, const char* name)
73 {
74 // Visual Studio has a 31-character limit on thread names. Longer names will
75 // be truncated silently, but we'd like callers to know about the limit.
76 #if !LOG_DISABLED
77 if (name && strlen(name) > 31)
78 WTF_LOG_ERROR("Thread name \"%s\" is longer than 31 characters and will be truncated by Visual Studio", name);
79 #endif
80
81 NewThreadContext* context = new NewThreadContext(entryPoint, data, name);
82
83 // Prevent the thread body from executing until we've established the thread identifier.
84 MutexLocker locker(context->creationMutex);
85
86 return createThreadInternal(threadEntryPoint, context, name);
87 }
88
89 } // namespace WTF
90