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1 /* | 1 /* |
2 * Copyright (C) 2007, 2009 Apple Inc. All rights reserved. | 2 * Copyright (C) 2007, 2009 Apple Inc. All rights reserved. |
3 * Copyright (C) 2007 Justin Haygood (jhaygood@reaktix.com) | 3 * Copyright (C) 2007 Justin Haygood (jhaygood@reaktix.com) |
4 * Copyright (C) 2011 Research In Motion Limited. All rights reserved. | 4 * Copyright (C) 2011 Research In Motion Limited. All rights reserved. |
5 * | 5 * |
6 * Redistribution and use in source and binary forms, with or without | 6 * Redistribution and use in source and binary forms, with or without |
7 * modification, are permitted provided that the following conditions | 7 * modification, are permitted provided that the following conditions |
8 * are met: | 8 * are met: |
9 * | 9 * |
10 * 1. Redistributions of source code must retain the above copyright | 10 * 1. Redistributions of source code must retain the above copyright |
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52 #if OS(LINUX) | 52 #if OS(LINUX) |
53 #include <sys/syscall.h> | 53 #include <sys/syscall.h> |
54 #endif | 54 #endif |
55 | 55 |
56 #if OS(LINUX) || OS(ANDROID) | 56 #if OS(LINUX) || OS(ANDROID) |
57 #include <unistd.h> | 57 #include <unistd.h> |
58 #endif | 58 #endif |
59 | 59 |
60 namespace WTF { | 60 namespace WTF { |
61 | 61 |
| 62 namespace internal { |
| 63 |
| 64 ThreadIdentifier currentThreadSyscall() { |
| 65 #if OS(MACOSX) |
| 66 return pthread_mach_thread_np(pthread_self()); |
| 67 #elif OS(LINUX) |
| 68 return syscall(__NR_gettid); |
| 69 #elif OS(ANDROID) |
| 70 return gettid(); |
| 71 #else |
| 72 return reinterpret_cast<uintptr_t>(pthread_self()); |
| 73 #endif |
| 74 } |
| 75 |
| 76 } // namespace internal |
| 77 |
62 static Mutex* atomicallyInitializedStaticMutex; | 78 static Mutex* atomicallyInitializedStaticMutex; |
63 | 79 |
64 void initializeThreading() { | 80 void initializeThreading() { |
65 // This should only be called once. | 81 // This should only be called once. |
66 DCHECK(!atomicallyInitializedStaticMutex); | 82 DCHECK(!atomicallyInitializedStaticMutex); |
67 | 83 |
68 // StringImpl::empty() does not construct its static string in a threadsafe | 84 // StringImpl::empty() does not construct its static string in a threadsafe |
69 // fashion, so ensure it has been initialized from here. | 85 // fashion, so ensure it has been initialized from here. |
70 StringImpl::empty(); | 86 StringImpl::empty(); |
71 StringImpl::empty16Bit(); | 87 StringImpl::empty16Bit(); |
72 atomicallyInitializedStaticMutex = new Mutex; | 88 atomicallyInitializedStaticMutex = new Mutex; |
73 wtfThreadData(); | 89 wtfThreadData(); |
74 initializeDates(); | 90 initializeDates(); |
75 // Force initialization of static DoubleToStringConverter converter variable | 91 // Force initialization of static DoubleToStringConverter converter variable |
76 // inside EcmaScriptConverter function while we are in single thread mode. | 92 // inside EcmaScriptConverter function while we are in single thread mode. |
77 double_conversion::DoubleToStringConverter::EcmaScriptConverter(); | 93 double_conversion::DoubleToStringConverter::EcmaScriptConverter(); |
78 } | 94 } |
79 | 95 |
80 void lockAtomicallyInitializedStaticMutex() { | 96 void lockAtomicallyInitializedStaticMutex() { |
81 DCHECK(atomicallyInitializedStaticMutex); | 97 DCHECK(atomicallyInitializedStaticMutex); |
82 atomicallyInitializedStaticMutex->lock(); | 98 atomicallyInitializedStaticMutex->lock(); |
83 } | 99 } |
84 | 100 |
85 void unlockAtomicallyInitializedStaticMutex() { | 101 void unlockAtomicallyInitializedStaticMutex() { |
86 atomicallyInitializedStaticMutex->unlock(); | 102 atomicallyInitializedStaticMutex->unlock(); |
87 } | 103 } |
88 | 104 |
89 ThreadIdentifier currentThread() { | 105 ThreadIdentifier currentThread() { |
90 #if OS(MACOSX) | 106 // TLS lookup is fast on these platforms. |
91 return pthread_mach_thread_np(pthread_self()); | 107 #if defined(__GLIBC__) || OS(ANDROID) || OS(FREEBSD) |
92 #elif OS(LINUX) | 108 return wtfThreadData().threadId(); |
93 return syscall(__NR_gettid); | |
94 #elif OS(ANDROID) | |
95 return gettid(); | |
96 #else | 109 #else |
97 return reinterpret_cast<uintptr_t>(pthread_self()); | 110 // TODO(csharrison): For platforms where TLS lookup is slow, use the hack that |
| 111 // oilpan uses in ThreadState::current() to check if this is the main thread |
| 112 // via stack address. |
| 113 return internal::currentThreadSyscall(); |
98 #endif | 114 #endif |
99 } | 115 } |
100 | 116 |
101 MutexBase::MutexBase(bool recursive) { | 117 MutexBase::MutexBase(bool recursive) { |
102 pthread_mutexattr_t attr; | 118 pthread_mutexattr_t attr; |
103 pthread_mutexattr_init(&attr); | 119 pthread_mutexattr_init(&attr); |
104 pthread_mutexattr_settype( | 120 pthread_mutexattr_settype( |
105 &attr, recursive ? PTHREAD_MUTEX_RECURSIVE : PTHREAD_MUTEX_NORMAL); | 121 &attr, recursive ? PTHREAD_MUTEX_RECURSIVE : PTHREAD_MUTEX_NORMAL); |
106 | 122 |
107 int result = pthread_mutex_init(&m_mutex.m_internalMutex, &attr); | 123 int result = pthread_mutex_init(&m_mutex.m_internalMutex, &attr); |
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238 } | 254 } |
239 | 255 |
240 void willCreateThread() { | 256 void willCreateThread() { |
241 s_threadCreated = true; | 257 s_threadCreated = true; |
242 } | 258 } |
243 #endif | 259 #endif |
244 | 260 |
245 } // namespace WTF | 261 } // namespace WTF |
246 | 262 |
247 #endif // OS(POSIX) | 263 #endif // OS(POSIX) |
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