1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
/*
* Copyright (C) 2009 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#if USE(PTHREADS)
#include "ThreadIdentifierDataPthreads.h"
#include "Threading.h"
namespace WTF {
pthread_key_t ThreadIdentifierData::m_key;
void clearPthreadHandleForIdentifier(ThreadIdentifier);
ThreadIdentifierData::~ThreadIdentifierData()
{
clearPthreadHandleForIdentifier(m_identifier);
}
ThreadIdentifier ThreadIdentifierData::identifier()
{
initializeKeyOnce();
ThreadIdentifierData* threadIdentifierData = static_cast<ThreadIdentifierData*>(pthread_getspecific(m_key));
return threadIdentifierData ? threadIdentifierData->m_identifier : 0;
}
void ThreadIdentifierData::initialize(ThreadIdentifier id)
{
ASSERT(!identifier());
initializeKeyOnce();
pthread_setspecific(m_key, new ThreadIdentifierData(id));
}
void ThreadIdentifierData::destruct(void* data)
{
ThreadIdentifierData* threadIdentifierData = static_cast<ThreadIdentifierData*>(data);
ASSERT(threadIdentifierData);
if (threadIdentifierData->m_isDestroyedOnce) {
delete threadIdentifierData;
return;
}
threadIdentifierData->m_isDestroyedOnce = true;
// Re-setting the value for key causes another destruct() call after all other thread-specific destructors were called.
pthread_setspecific(m_key, threadIdentifierData);
}
void ThreadIdentifierData::initializeKeyOnceHelper()
{
if (pthread_key_create(&m_key, destruct))
CRASH();
}
void ThreadIdentifierData::initializeKeyOnce()
{
static pthread_once_t onceControl = PTHREAD_ONCE_INIT;
if (pthread_once(&onceControl, initializeKeyOnceHelper))
CRASH();
}
} // namespace WTF
#endif // USE(PTHREADS)
|
