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150
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1 // -*- C++ -*-
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2 //===----------------------------------------------------------------------===//
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3 //
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4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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5 // See https://llvm.org/LICENSE.txt for license information.
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6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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7 //
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8 //===----------------------------------------------------------------------===//
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9
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236
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10 #ifndef _LIBCPP___THREADING_SUPPORT
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11 #define _LIBCPP___THREADING_SUPPORT
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150
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12
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221
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13 #include <__availability>
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236
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14 #include <__chrono/convert_to_timespec.h>
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15 #include <__chrono/duration.h>
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150
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16 #include <__config>
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236
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17 #include <__thread/poll_with_backoff.h>
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221
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18 #include <errno.h>
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19
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20 #ifdef __MVS__
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21 # include <__support/ibm/nanosleep.h>
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22 #endif
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150
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23
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24 #ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
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236
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25 # pragma GCC system_header
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150
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26 #endif
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27
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28 #if defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
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29 # include <__external_threading>
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30 #elif !defined(_LIBCPP_HAS_NO_THREADS)
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31
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32 #if defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
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252
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33 // Some platforms require <bits/atomic_wide_counter.h> in order for
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34 // PTHREAD_COND_INITIALIZER to be expanded. Normally that would come
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35 // in via <pthread.h>, but it's a non-modular header on those platforms,
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36 // so libc++'s <math.h> usually absorbs atomic_wide_counter.h into the
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37 // module with <math.h> and makes atomic_wide_counter.h invisible.
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38 // Include <math.h> here to work around that.
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39 # include <math.h>
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40
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150
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41 # include <pthread.h>
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42 # include <sched.h>
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43 #elif defined(_LIBCPP_HAS_THREAD_API_C11)
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44 # include <threads.h>
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45 #endif
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46
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252
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47 #if defined(_LIBCPP_HAS_THREAD_API_WIN32)
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48 #define _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_EXPORTED_FROM_ABI
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150
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49 #else
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50 #define _LIBCPP_THREAD_ABI_VISIBILITY inline _LIBCPP_INLINE_VISIBILITY
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51 #endif
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52
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53 typedef ::timespec __libcpp_timespec_t;
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54 #endif // !defined(_LIBCPP_HAS_NO_THREADS)
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55
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56 _LIBCPP_BEGIN_NAMESPACE_STD
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57
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58 #if !defined(_LIBCPP_HAS_NO_THREADS)
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59
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60 #if defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
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61 // Mutex
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62 typedef pthread_mutex_t __libcpp_mutex_t;
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63 #define _LIBCPP_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
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64
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65 typedef pthread_mutex_t __libcpp_recursive_mutex_t;
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66
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67 // Condition Variable
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68 typedef pthread_cond_t __libcpp_condvar_t;
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69 #define _LIBCPP_CONDVAR_INITIALIZER PTHREAD_COND_INITIALIZER
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70
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71 // Execute once
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72 typedef pthread_once_t __libcpp_exec_once_flag;
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73 #define _LIBCPP_EXEC_ONCE_INITIALIZER PTHREAD_ONCE_INIT
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74
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75 // Thread id
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221
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76 #if defined(__MVS__)
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77 typedef unsigned long long __libcpp_thread_id;
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78 #else
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79 typedef pthread_t __libcpp_thread_id;
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80 #endif
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150
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81
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82 // Thread
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221
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83 #define _LIBCPP_NULL_THREAD ((__libcpp_thread_t()))
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150
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84 typedef pthread_t __libcpp_thread_t;
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85
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86 // Thread Local Storage
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87 typedef pthread_key_t __libcpp_tls_key;
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88
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89 #define _LIBCPP_TLS_DESTRUCTOR_CC
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90 #elif defined(_LIBCPP_HAS_THREAD_API_C11)
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91 // Mutex
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92 typedef mtx_t __libcpp_mutex_t;
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93 // mtx_t is a struct so using {} for initialization is valid.
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94 #define _LIBCPP_MUTEX_INITIALIZER {}
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95
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96 typedef mtx_t __libcpp_recursive_mutex_t;
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97
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98 // Condition Variable
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99 typedef cnd_t __libcpp_condvar_t;
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100 // cnd_t is a struct so using {} for initialization is valid.
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101 #define _LIBCPP_CONDVAR_INITIALIZER {}
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102
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103 // Execute once
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104 typedef once_flag __libcpp_exec_once_flag;
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105 #define _LIBCPP_EXEC_ONCE_INITIALIZER ONCE_FLAG_INIT
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106
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107 // Thread id
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108 typedef thrd_t __libcpp_thread_id;
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109
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110 // Thread
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111 #define _LIBCPP_NULL_THREAD 0U
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112
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113 typedef thrd_t __libcpp_thread_t;
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114
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115 // Thread Local Storage
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116 typedef tss_t __libcpp_tls_key;
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117
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118 #define _LIBCPP_TLS_DESTRUCTOR_CC
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119 #elif !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
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120 // Mutex
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121 typedef void* __libcpp_mutex_t;
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122 #define _LIBCPP_MUTEX_INITIALIZER 0
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123
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124 #if defined(_M_IX86) || defined(__i386__) || defined(_M_ARM) || defined(__arm__)
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125 typedef void* __libcpp_recursive_mutex_t[6];
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126 #elif defined(_M_AMD64) || defined(__x86_64__) || defined(_M_ARM64) || defined(__aarch64__)
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127 typedef void* __libcpp_recursive_mutex_t[5];
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128 #else
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129 # error Unsupported architecture
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130 #endif
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131
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132 // Condition Variable
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133 typedef void* __libcpp_condvar_t;
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134 #define _LIBCPP_CONDVAR_INITIALIZER 0
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135
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136 // Execute Once
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137 typedef void* __libcpp_exec_once_flag;
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138 #define _LIBCPP_EXEC_ONCE_INITIALIZER 0
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139
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140 // Thread ID
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141 typedef long __libcpp_thread_id;
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142
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143 // Thread
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144 #define _LIBCPP_NULL_THREAD 0U
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145
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146 typedef void* __libcpp_thread_t;
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147
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148 // Thread Local Storage
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149 typedef long __libcpp_tls_key;
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150
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151 #define _LIBCPP_TLS_DESTRUCTOR_CC __stdcall
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152 #endif // !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
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153
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154 #if !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
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155 // Mutex
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156 _LIBCPP_THREAD_ABI_VISIBILITY
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157 int __libcpp_recursive_mutex_init(__libcpp_recursive_mutex_t *__m);
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158
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159 _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
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160 int __libcpp_recursive_mutex_lock(__libcpp_recursive_mutex_t *__m);
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161
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162 _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
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163 bool __libcpp_recursive_mutex_trylock(__libcpp_recursive_mutex_t *__m);
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164
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165 _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
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166 int __libcpp_recursive_mutex_unlock(__libcpp_recursive_mutex_t *__m);
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167
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168 _LIBCPP_THREAD_ABI_VISIBILITY
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169 int __libcpp_recursive_mutex_destroy(__libcpp_recursive_mutex_t *__m);
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170
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171 _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
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172 int __libcpp_mutex_lock(__libcpp_mutex_t *__m);
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173
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174 _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
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175 bool __libcpp_mutex_trylock(__libcpp_mutex_t *__m);
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176
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177 _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
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178 int __libcpp_mutex_unlock(__libcpp_mutex_t *__m);
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179
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180 _LIBCPP_THREAD_ABI_VISIBILITY
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181 int __libcpp_mutex_destroy(__libcpp_mutex_t *__m);
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182
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183 // Condition variable
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184 _LIBCPP_THREAD_ABI_VISIBILITY
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185 int __libcpp_condvar_signal(__libcpp_condvar_t* __cv);
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186
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187 _LIBCPP_THREAD_ABI_VISIBILITY
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188 int __libcpp_condvar_broadcast(__libcpp_condvar_t* __cv);
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189
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190 _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
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191 int __libcpp_condvar_wait(__libcpp_condvar_t* __cv, __libcpp_mutex_t* __m);
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192
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193 _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
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194 int __libcpp_condvar_timedwait(__libcpp_condvar_t *__cv, __libcpp_mutex_t *__m,
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195 __libcpp_timespec_t *__ts);
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196
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197 _LIBCPP_THREAD_ABI_VISIBILITY
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198 int __libcpp_condvar_destroy(__libcpp_condvar_t* __cv);
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199
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200 // Execute once
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201 _LIBCPP_THREAD_ABI_VISIBILITY
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236
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202 int __libcpp_execute_once(__libcpp_exec_once_flag *__flag,
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203 void (*__init_routine)());
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150
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204
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205 // Thread id
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206 _LIBCPP_THREAD_ABI_VISIBILITY
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236
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207 bool __libcpp_thread_id_equal(__libcpp_thread_id __t1, __libcpp_thread_id __t2);
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208
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209 _LIBCPP_THREAD_ABI_VISIBILITY
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236
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210 bool __libcpp_thread_id_less(__libcpp_thread_id __t1, __libcpp_thread_id __t2);
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211
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212 // Thread
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213 _LIBCPP_THREAD_ABI_VISIBILITY
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214 bool __libcpp_thread_isnull(const __libcpp_thread_t *__t);
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215
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216 _LIBCPP_THREAD_ABI_VISIBILITY
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217 int __libcpp_thread_create(__libcpp_thread_t *__t, void *(*__func)(void *),
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218 void *__arg);
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219
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220 _LIBCPP_THREAD_ABI_VISIBILITY
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221 __libcpp_thread_id __libcpp_thread_get_current_id();
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222
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223 _LIBCPP_THREAD_ABI_VISIBILITY
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224 __libcpp_thread_id __libcpp_thread_get_id(const __libcpp_thread_t *__t);
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225
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226 _LIBCPP_THREAD_ABI_VISIBILITY
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227 int __libcpp_thread_join(__libcpp_thread_t *__t);
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228
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229 _LIBCPP_THREAD_ABI_VISIBILITY
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230 int __libcpp_thread_detach(__libcpp_thread_t *__t);
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231
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232 _LIBCPP_THREAD_ABI_VISIBILITY
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233 void __libcpp_thread_yield();
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234
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235 _LIBCPP_THREAD_ABI_VISIBILITY
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236 void __libcpp_thread_sleep_for(const chrono::nanoseconds& __ns);
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237
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238 // Thread local storage
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239 _LIBCPP_THREAD_ABI_VISIBILITY
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240 int __libcpp_tls_create(__libcpp_tls_key* __key,
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241 void(_LIBCPP_TLS_DESTRUCTOR_CC* __at_exit)(void*));
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242
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243 _LIBCPP_THREAD_ABI_VISIBILITY
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244 void *__libcpp_tls_get(__libcpp_tls_key __key);
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245
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246 _LIBCPP_THREAD_ABI_VISIBILITY
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247 int __libcpp_tls_set(__libcpp_tls_key __key, void *__p);
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248
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249 #endif // !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
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250
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251 #if defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
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252
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253 int __libcpp_recursive_mutex_init(__libcpp_recursive_mutex_t *__m)
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254 {
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252
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255 pthread_mutexattr_t __attr;
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256 int __ec = pthread_mutexattr_init(&__attr);
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150
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257 if (__ec)
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258 return __ec;
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252
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259 __ec = pthread_mutexattr_settype(&__attr, PTHREAD_MUTEX_RECURSIVE);
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150
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260 if (__ec) {
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252
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261 pthread_mutexattr_destroy(&__attr);
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262 return __ec;
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263 }
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252
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264 __ec = pthread_mutex_init(__m, &__attr);
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150
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265 if (__ec) {
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252
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266 pthread_mutexattr_destroy(&__attr);
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267 return __ec;
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268 }
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252
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269 __ec = pthread_mutexattr_destroy(&__attr);
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150
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270 if (__ec) {
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271 pthread_mutex_destroy(__m);
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272 return __ec;
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273 }
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274 return 0;
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275 }
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276
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277 int __libcpp_recursive_mutex_lock(__libcpp_recursive_mutex_t *__m)
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278 {
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279 return pthread_mutex_lock(__m);
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280 }
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281
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282 bool __libcpp_recursive_mutex_trylock(__libcpp_recursive_mutex_t *__m)
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283 {
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284 return pthread_mutex_trylock(__m) == 0;
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285 }
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286
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221
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287 int __libcpp_recursive_mutex_unlock(__libcpp_recursive_mutex_t *__m)
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150
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288 {
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289 return pthread_mutex_unlock(__m);
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290 }
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291
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292 int __libcpp_recursive_mutex_destroy(__libcpp_recursive_mutex_t *__m)
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293 {
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294 return pthread_mutex_destroy(__m);
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295 }
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296
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297 int __libcpp_mutex_lock(__libcpp_mutex_t *__m)
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298 {
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299 return pthread_mutex_lock(__m);
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300 }
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301
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302 bool __libcpp_mutex_trylock(__libcpp_mutex_t *__m)
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303 {
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304 return pthread_mutex_trylock(__m) == 0;
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305 }
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306
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307 int __libcpp_mutex_unlock(__libcpp_mutex_t *__m)
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308 {
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309 return pthread_mutex_unlock(__m);
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310 }
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311
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312 int __libcpp_mutex_destroy(__libcpp_mutex_t *__m)
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313 {
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314 return pthread_mutex_destroy(__m);
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315 }
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316
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317 // Condition Variable
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318 int __libcpp_condvar_signal(__libcpp_condvar_t *__cv)
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319 {
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320 return pthread_cond_signal(__cv);
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321 }
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322
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323 int __libcpp_condvar_broadcast(__libcpp_condvar_t *__cv)
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324 {
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325 return pthread_cond_broadcast(__cv);
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326 }
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327
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328 int __libcpp_condvar_wait(__libcpp_condvar_t *__cv, __libcpp_mutex_t *__m)
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329 {
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330 return pthread_cond_wait(__cv, __m);
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331 }
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332
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333 int __libcpp_condvar_timedwait(__libcpp_condvar_t *__cv, __libcpp_mutex_t *__m,
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334 __libcpp_timespec_t *__ts)
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335 {
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336 return pthread_cond_timedwait(__cv, __m, __ts);
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337 }
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338
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339 int __libcpp_condvar_destroy(__libcpp_condvar_t *__cv)
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340 {
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341 return pthread_cond_destroy(__cv);
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342 }
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343
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344 // Execute once
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236
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345 int __libcpp_execute_once(__libcpp_exec_once_flag *__flag,
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346 void (*__init_routine)()) {
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347 return pthread_once(__flag, __init_routine);
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150
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348 }
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349
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350 // Thread id
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351 // Returns non-zero if the thread ids are equal, otherwise 0
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236
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352 bool __libcpp_thread_id_equal(__libcpp_thread_id __t1, __libcpp_thread_id __t2)
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150
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353 {
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236
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354 return __t1 == __t2;
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150
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355 }
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356
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357 // Returns non-zero if t1 < t2, otherwise 0
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236
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358 bool __libcpp_thread_id_less(__libcpp_thread_id __t1, __libcpp_thread_id __t2)
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150
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359 {
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236
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360 return __t1 < __t2;
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150
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361 }
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362
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363 // Thread
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364 bool __libcpp_thread_isnull(const __libcpp_thread_t *__t) {
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221
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365 return __libcpp_thread_get_id(__t) == 0;
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150
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366 }
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367
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368 int __libcpp_thread_create(__libcpp_thread_t *__t, void *(*__func)(void *),
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369 void *__arg)
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370 {
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221
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371 return pthread_create(__t, nullptr, __func, __arg);
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150
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372 }
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373
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|
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374 __libcpp_thread_id __libcpp_thread_get_current_id()
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375 {
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252
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376 const __libcpp_thread_t __current_thread = pthread_self();
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377 return __libcpp_thread_get_id(&__current_thread);
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150
|
378 }
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379
|
|
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380 __libcpp_thread_id __libcpp_thread_get_id(const __libcpp_thread_t *__t)
|
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|
381 {
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221
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382 #if defined(__MVS__)
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383 return __t->__;
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384 #else
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150
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385 return *__t;
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221
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386 #endif
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150
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387 }
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388
|
|
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389 int __libcpp_thread_join(__libcpp_thread_t *__t)
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390 {
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221
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391 return pthread_join(*__t, nullptr);
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150
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392 }
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393
|
|
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394 int __libcpp_thread_detach(__libcpp_thread_t *__t)
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395 {
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396 return pthread_detach(*__t);
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|
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397 }
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398
|
|
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399 void __libcpp_thread_yield()
|
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400 {
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401 sched_yield();
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|
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402 }
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403
|
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404 void __libcpp_thread_sleep_for(const chrono::nanoseconds& __ns)
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405 {
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236
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406 __libcpp_timespec_t __ts = _VSTD::__convert_to_timespec<__libcpp_timespec_t>(__ns);
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150
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407 while (nanosleep(&__ts, &__ts) == -1 && errno == EINTR);
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|
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408 }
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409
|
|
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410 // Thread local storage
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|
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411 int __libcpp_tls_create(__libcpp_tls_key *__key, void (*__at_exit)(void *))
|
|
|
412 {
|
|
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413 return pthread_key_create(__key, __at_exit);
|
|
|
414 }
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|
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415
|
|
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416 void *__libcpp_tls_get(__libcpp_tls_key __key)
|
|
|
417 {
|
|
|
418 return pthread_getspecific(__key);
|
|
|
419 }
|
|
|
420
|
|
|
421 int __libcpp_tls_set(__libcpp_tls_key __key, void *__p)
|
|
|
422 {
|
|
|
423 return pthread_setspecific(__key, __p);
|
|
|
424 }
|
|
|
425
|
|
|
426 #elif defined(_LIBCPP_HAS_THREAD_API_C11)
|
|
|
427
|
|
|
428 int __libcpp_recursive_mutex_init(__libcpp_recursive_mutex_t *__m)
|
|
|
429 {
|
|
|
430 return mtx_init(__m, mtx_plain | mtx_recursive) == thrd_success ? 0 : EINVAL;
|
|
|
431 }
|
|
|
432
|
|
|
433 int __libcpp_recursive_mutex_lock(__libcpp_recursive_mutex_t *__m)
|
|
|
434 {
|
|
|
435 return mtx_lock(__m) == thrd_success ? 0 : EINVAL;
|
|
|
436 }
|
|
|
437
|
|
|
438 bool __libcpp_recursive_mutex_trylock(__libcpp_recursive_mutex_t *__m)
|
|
|
439 {
|
|
|
440 return mtx_trylock(__m) == thrd_success;
|
|
|
441 }
|
|
|
442
|
|
221
|
443 int __libcpp_recursive_mutex_unlock(__libcpp_recursive_mutex_t *__m)
|
|
150
|
444 {
|
|
|
445 return mtx_unlock(__m) == thrd_success ? 0 : EINVAL;
|
|
|
446 }
|
|
|
447
|
|
|
448 int __libcpp_recursive_mutex_destroy(__libcpp_recursive_mutex_t *__m)
|
|
|
449 {
|
|
|
450 mtx_destroy(__m);
|
|
|
451 return 0;
|
|
|
452 }
|
|
|
453
|
|
|
454 int __libcpp_mutex_lock(__libcpp_mutex_t *__m)
|
|
|
455 {
|
|
|
456 return mtx_lock(__m) == thrd_success ? 0 : EINVAL;
|
|
|
457 }
|
|
|
458
|
|
|
459 bool __libcpp_mutex_trylock(__libcpp_mutex_t *__m)
|
|
|
460 {
|
|
|
461 return mtx_trylock(__m) == thrd_success;
|
|
|
462 }
|
|
|
463
|
|
|
464 int __libcpp_mutex_unlock(__libcpp_mutex_t *__m)
|
|
|
465 {
|
|
|
466 return mtx_unlock(__m) == thrd_success ? 0 : EINVAL;
|
|
|
467 }
|
|
|
468
|
|
|
469 int __libcpp_mutex_destroy(__libcpp_mutex_t *__m)
|
|
|
470 {
|
|
|
471 mtx_destroy(__m);
|
|
|
472 return 0;
|
|
|
473 }
|
|
|
474
|
|
|
475 // Condition Variable
|
|
|
476 int __libcpp_condvar_signal(__libcpp_condvar_t *__cv)
|
|
|
477 {
|
|
|
478 return cnd_signal(__cv) == thrd_success ? 0 : EINVAL;
|
|
|
479 }
|
|
|
480
|
|
|
481 int __libcpp_condvar_broadcast(__libcpp_condvar_t *__cv)
|
|
|
482 {
|
|
|
483 return cnd_broadcast(__cv) == thrd_success ? 0 : EINVAL;
|
|
|
484 }
|
|
|
485
|
|
|
486 int __libcpp_condvar_wait(__libcpp_condvar_t *__cv, __libcpp_mutex_t *__m)
|
|
|
487 {
|
|
|
488 return cnd_wait(__cv, __m) == thrd_success ? 0 : EINVAL;
|
|
|
489 }
|
|
|
490
|
|
|
491 int __libcpp_condvar_timedwait(__libcpp_condvar_t *__cv, __libcpp_mutex_t *__m,
|
|
|
492 timespec *__ts)
|
|
|
493 {
|
|
|
494 int __ec = cnd_timedwait(__cv, __m, __ts);
|
|
|
495 return __ec == thrd_timedout ? ETIMEDOUT : __ec;
|
|
|
496 }
|
|
|
497
|
|
|
498 int __libcpp_condvar_destroy(__libcpp_condvar_t *__cv)
|
|
|
499 {
|
|
|
500 cnd_destroy(__cv);
|
|
|
501 return 0;
|
|
|
502 }
|
|
|
503
|
|
|
504 // Execute once
|
|
|
505 int __libcpp_execute_once(__libcpp_exec_once_flag *flag,
|
|
|
506 void (*init_routine)(void)) {
|
|
|
507 ::call_once(flag, init_routine);
|
|
|
508 return 0;
|
|
|
509 }
|
|
|
510
|
|
|
511 // Thread id
|
|
|
512 // Returns non-zero if the thread ids are equal, otherwise 0
|
|
|
513 bool __libcpp_thread_id_equal(__libcpp_thread_id t1, __libcpp_thread_id t2)
|
|
|
514 {
|
|
|
515 return thrd_equal(t1, t2) != 0;
|
|
|
516 }
|
|
|
517
|
|
|
518 // Returns non-zero if t1 < t2, otherwise 0
|
|
|
519 bool __libcpp_thread_id_less(__libcpp_thread_id t1, __libcpp_thread_id t2)
|
|
|
520 {
|
|
|
521 return t1 < t2;
|
|
|
522 }
|
|
|
523
|
|
|
524 // Thread
|
|
|
525 bool __libcpp_thread_isnull(const __libcpp_thread_t *__t) {
|
|
221
|
526 return __libcpp_thread_get_id(__t) == 0;
|
|
150
|
527 }
|
|
|
528
|
|
|
529 int __libcpp_thread_create(__libcpp_thread_t *__t, void *(*__func)(void *),
|
|
|
530 void *__arg)
|
|
|
531 {
|
|
|
532 int __ec = thrd_create(__t, reinterpret_cast<thrd_start_t>(__func), __arg);
|
|
|
533 return __ec == thrd_nomem ? ENOMEM : __ec;
|
|
|
534 }
|
|
|
535
|
|
|
536 __libcpp_thread_id __libcpp_thread_get_current_id()
|
|
|
537 {
|
|
|
538 return thrd_current();
|
|
|
539 }
|
|
|
540
|
|
|
541 __libcpp_thread_id __libcpp_thread_get_id(const __libcpp_thread_t *__t)
|
|
|
542 {
|
|
|
543 return *__t;
|
|
|
544 }
|
|
|
545
|
|
|
546 int __libcpp_thread_join(__libcpp_thread_t *__t)
|
|
|
547 {
|
|
|
548 return thrd_join(*__t, nullptr) == thrd_success ? 0 : EINVAL;
|
|
|
549 }
|
|
|
550
|
|
|
551 int __libcpp_thread_detach(__libcpp_thread_t *__t)
|
|
|
552 {
|
|
|
553 return thrd_detach(*__t) == thrd_success ? 0 : EINVAL;
|
|
|
554 }
|
|
|
555
|
|
|
556 void __libcpp_thread_yield()
|
|
|
557 {
|
|
|
558 thrd_yield();
|
|
|
559 }
|
|
|
560
|
|
|
561 void __libcpp_thread_sleep_for(const chrono::nanoseconds& __ns)
|
|
|
562 {
|
|
236
|
563 __libcpp_timespec_t __ts = _VSTD::__convert_to_timespec<__libcpp_timespec_t>(__ns);
|
|
150
|
564 thrd_sleep(&__ts, nullptr);
|
|
|
565 }
|
|
|
566
|
|
|
567 // Thread local storage
|
|
|
568 int __libcpp_tls_create(__libcpp_tls_key *__key, void (*__at_exit)(void *))
|
|
|
569 {
|
|
|
570 return tss_create(__key, __at_exit) == thrd_success ? 0 : EINVAL;
|
|
|
571 }
|
|
|
572
|
|
|
573 void *__libcpp_tls_get(__libcpp_tls_key __key)
|
|
|
574 {
|
|
|
575 return tss_get(__key);
|
|
|
576 }
|
|
|
577
|
|
|
578 int __libcpp_tls_set(__libcpp_tls_key __key, void *__p)
|
|
|
579 {
|
|
|
580 return tss_set(__key, __p) == thrd_success ? 0 : EINVAL;
|
|
|
581 }
|
|
|
582
|
|
|
583 #endif
|
|
|
584
|
|
|
585 #endif // !_LIBCPP_HAS_NO_THREADS
|
|
|
586
|
|
|
587 _LIBCPP_END_NAMESPACE_STD
|
|
|
588
|
|
236
|
589 #endif // _LIBCPP___THREADING_SUPPORT
|
