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1 /* | |
2 * Copyright (C) 2009, 2011 Google 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 are | |
6 * met: | |
7 * | |
8 * * Redistributions of source code must retain the above copyright | |
9 * notice, this list of conditions and the following disclaimer. | |
10 * * Redistributions in binary form must reproduce the above | |
11 * copyright notice, this list of conditions and the following disclaimer | |
12 * in the documentation and/or other materials provided with the | |
13 * distribution. | |
14 * * Neither the name of Google Inc. nor the names of its | |
15 * contributors may be used to endorse or promote products derived from | |
16 * this software without specific prior written permission. | |
17 * | |
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
29 */ | |
30 | |
31 #include "config.h" | |
32 | |
33 #if USE(PTHREADS) | |
34 | |
35 #include "ThreadIdentifierDataPthreads.h" | |
36 | |
37 #include "Threading.h" | |
38 | |
39 #if OS(ANDROID) || OS(HURD) | |
40 // PTHREAD_KEYS_MAX is not defined in bionic nor in Hurd, so explicitly define i
t here. | |
41 #define PTHREAD_KEYS_MAX 1024 | |
42 #else | |
43 #include <limits.h> | |
44 #endif | |
45 | |
46 namespace WTF { | |
47 | |
48 pthread_key_t ThreadIdentifierData::m_key = PTHREAD_KEYS_MAX; | |
49 | |
50 void threadDidExit(ThreadIdentifier); | |
51 | |
52 ThreadIdentifierData::~ThreadIdentifierData() | |
53 { | |
54 threadDidExit(m_identifier); | |
55 } | |
56 | |
57 void ThreadIdentifierData::initializeOnce() | |
58 { | |
59 if (pthread_key_create(&m_key, destruct)) | |
60 CRASH(); | |
61 } | |
62 | |
63 ThreadIdentifier ThreadIdentifierData::identifier() | |
64 { | |
65 ASSERT(m_key != PTHREAD_KEYS_MAX); | |
66 ThreadIdentifierData* threadIdentifierData = static_cast<ThreadIdentifierDat
a*>(pthread_getspecific(m_key)); | |
67 | |
68 return threadIdentifierData ? threadIdentifierData->m_identifier : 0; | |
69 } | |
70 | |
71 void ThreadIdentifierData::initialize(ThreadIdentifier id) | |
72 { | |
73 ASSERT(!identifier()); | |
74 pthread_setspecific(m_key, new ThreadIdentifierData(id)); | |
75 } | |
76 | |
77 void ThreadIdentifierData::destruct(void* data) | |
78 { | |
79 ThreadIdentifierData* threadIdentifierData = static_cast<ThreadIdentifierDat
a*>(data); | |
80 ASSERT(threadIdentifierData); | |
81 | |
82 if (threadIdentifierData->m_isDestroyedOnce) { | |
83 delete threadIdentifierData; | |
84 return; | |
85 } | |
86 | |
87 threadIdentifierData->m_isDestroyedOnce = true; | |
88 // Re-setting the value for key causes another destruct() call after all oth
er thread-specific destructors were called. | |
89 pthread_setspecific(m_key, threadIdentifierData); | |
90 } | |
91 | |
92 } // namespace WTF | |
93 | |
94 #endif // USE(PTHREADS) | |
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