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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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10 #ifndef _LIBCPP_THREADING_SUPPORT
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11 #define _LIBCPP_THREADING_SUPPORT
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12
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13 #include <__config>
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14 #include <chrono>
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15 #include <iosfwd>
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16 #include <errno.h>
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17
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18 #ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
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19 #pragma GCC system_header
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20 #endif
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21
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22 #if defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
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23 # include <__external_threading>
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24 #elif !defined(_LIBCPP_HAS_NO_THREADS)
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25
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26 #if defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
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27 # include <pthread.h>
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28 # include <sched.h>
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29 #elif defined(_LIBCPP_HAS_THREAD_API_C11)
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30 # include <threads.h>
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31 #endif
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32
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33 #if defined(_LIBCPP_HAS_THREAD_LIBRARY_EXTERNAL) || \
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34 defined(_LIBCPP_BUILDING_THREAD_LIBRARY_EXTERNAL) || \
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35 defined(_LIBCPP_HAS_THREAD_API_WIN32)
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36 #define _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_FUNC_VIS
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37 #else
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38 #define _LIBCPP_THREAD_ABI_VISIBILITY inline _LIBCPP_INLINE_VISIBILITY
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39 #endif
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40
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41 #if defined(__FreeBSD__) && defined(__clang__) && __has_attribute(no_thread_safety_analysis)
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42 #define _LIBCPP_NO_THREAD_SAFETY_ANALYSIS __attribute__((no_thread_safety_analysis))
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43 #else
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44 #define _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
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45 #endif
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46
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47 typedef ::timespec __libcpp_timespec_t;
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48 #endif // !defined(_LIBCPP_HAS_NO_THREADS)
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49
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50 _LIBCPP_PUSH_MACROS
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51 #include <__undef_macros>
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52
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53 _LIBCPP_BEGIN_NAMESPACE_STD
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54
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55 #if !defined(_LIBCPP_HAS_NO_THREADS)
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56
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57 #if defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
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58 // Mutex
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59 typedef pthread_mutex_t __libcpp_mutex_t;
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60 #define _LIBCPP_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
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61
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62 typedef pthread_mutex_t __libcpp_recursive_mutex_t;
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63
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64 // Condition Variable
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65 typedef pthread_cond_t __libcpp_condvar_t;
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66 #define _LIBCPP_CONDVAR_INITIALIZER PTHREAD_COND_INITIALIZER
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67
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68 // Execute once
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69 typedef pthread_once_t __libcpp_exec_once_flag;
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70 #define _LIBCPP_EXEC_ONCE_INITIALIZER PTHREAD_ONCE_INIT
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71
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72 // Thread id
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73 typedef pthread_t __libcpp_thread_id;
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74
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75 // Thread
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76 #define _LIBCPP_NULL_THREAD 0U
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77
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78 typedef pthread_t __libcpp_thread_t;
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79
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80 // Thread Local Storage
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81 typedef pthread_key_t __libcpp_tls_key;
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82
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83 #define _LIBCPP_TLS_DESTRUCTOR_CC
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84 #elif defined(_LIBCPP_HAS_THREAD_API_C11)
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85 // Mutex
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86 typedef mtx_t __libcpp_mutex_t;
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87 // mtx_t is a struct so using {} for initialization is valid.
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88 #define _LIBCPP_MUTEX_INITIALIZER {}
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89
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90 typedef mtx_t __libcpp_recursive_mutex_t;
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91
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92 // Condition Variable
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93 typedef cnd_t __libcpp_condvar_t;
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94 // cnd_t is a struct so using {} for initialization is valid.
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95 #define _LIBCPP_CONDVAR_INITIALIZER {}
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96
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97 // Execute once
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98 typedef once_flag __libcpp_exec_once_flag;
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99 #define _LIBCPP_EXEC_ONCE_INITIALIZER ONCE_FLAG_INIT
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100
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101 // Thread id
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102 typedef thrd_t __libcpp_thread_id;
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103
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104 // Thread
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105 #define _LIBCPP_NULL_THREAD 0U
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106
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107 typedef thrd_t __libcpp_thread_t;
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108
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109 // Thread Local Storage
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110 typedef tss_t __libcpp_tls_key;
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111
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112 #define _LIBCPP_TLS_DESTRUCTOR_CC
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113 #elif !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
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114 // Mutex
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115 typedef void* __libcpp_mutex_t;
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116 #define _LIBCPP_MUTEX_INITIALIZER 0
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117
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118 #if defined(_M_IX86) || defined(__i386__) || defined(_M_ARM) || defined(__arm__)
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119 typedef void* __libcpp_recursive_mutex_t[6];
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120 #elif defined(_M_AMD64) || defined(__x86_64__) || defined(_M_ARM64) || defined(__aarch64__)
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121 typedef void* __libcpp_recursive_mutex_t[5];
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122 #else
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123 # error Unsupported architecture
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124 #endif
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125
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126 // Condition Variable
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127 typedef void* __libcpp_condvar_t;
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128 #define _LIBCPP_CONDVAR_INITIALIZER 0
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129
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130 // Execute Once
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131 typedef void* __libcpp_exec_once_flag;
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132 #define _LIBCPP_EXEC_ONCE_INITIALIZER 0
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133
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134 // Thread ID
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135 typedef long __libcpp_thread_id;
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136
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137 // Thread
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138 #define _LIBCPP_NULL_THREAD 0U
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139
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140 typedef void* __libcpp_thread_t;
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141
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142 // Thread Local Storage
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143 typedef long __libcpp_tls_key;
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144
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145 #define _LIBCPP_TLS_DESTRUCTOR_CC __stdcall
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146 #endif // !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
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147
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148 #if !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
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149 // Mutex
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150 _LIBCPP_THREAD_ABI_VISIBILITY
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151 int __libcpp_recursive_mutex_init(__libcpp_recursive_mutex_t *__m);
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152
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153 _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
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154 int __libcpp_recursive_mutex_lock(__libcpp_recursive_mutex_t *__m);
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155
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156 _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
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157 bool __libcpp_recursive_mutex_trylock(__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_unlock(__libcpp_recursive_mutex_t *__m);
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161
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162 _LIBCPP_THREAD_ABI_VISIBILITY
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163 int __libcpp_recursive_mutex_destroy(__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_mutex_lock(__libcpp_mutex_t *__m);
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167
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168 _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
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169 bool __libcpp_mutex_trylock(__libcpp_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_unlock(__libcpp_mutex_t *__m);
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173
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174 _LIBCPP_THREAD_ABI_VISIBILITY
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175 int __libcpp_mutex_destroy(__libcpp_mutex_t *__m);
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176
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177 // Condition variable
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178 _LIBCPP_THREAD_ABI_VISIBILITY
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179 int __libcpp_condvar_signal(__libcpp_condvar_t* __cv);
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180
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181 _LIBCPP_THREAD_ABI_VISIBILITY
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182 int __libcpp_condvar_broadcast(__libcpp_condvar_t* __cv);
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183
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184 _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
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185 int __libcpp_condvar_wait(__libcpp_condvar_t* __cv, __libcpp_mutex_t* __m);
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186
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187 _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
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188 int __libcpp_condvar_timedwait(__libcpp_condvar_t *__cv, __libcpp_mutex_t *__m,
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189 __libcpp_timespec_t *__ts);
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190
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191 _LIBCPP_THREAD_ABI_VISIBILITY
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192 int __libcpp_condvar_destroy(__libcpp_condvar_t* __cv);
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193
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194 // Execute once
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195 _LIBCPP_THREAD_ABI_VISIBILITY
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196 int __libcpp_execute_once(__libcpp_exec_once_flag *flag,
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197 void (*init_routine)());
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198
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199 // Thread id
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200 _LIBCPP_THREAD_ABI_VISIBILITY
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201 bool __libcpp_thread_id_equal(__libcpp_thread_id t1, __libcpp_thread_id t2);
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202
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203 _LIBCPP_THREAD_ABI_VISIBILITY
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204 bool __libcpp_thread_id_less(__libcpp_thread_id t1, __libcpp_thread_id t2);
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205
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206 // Thread
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207 _LIBCPP_THREAD_ABI_VISIBILITY
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208 bool __libcpp_thread_isnull(const __libcpp_thread_t *__t);
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209
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210 _LIBCPP_THREAD_ABI_VISIBILITY
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211 int __libcpp_thread_create(__libcpp_thread_t *__t, void *(*__func)(void *),
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212 void *__arg);
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213
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214 _LIBCPP_THREAD_ABI_VISIBILITY
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215 __libcpp_thread_id __libcpp_thread_get_current_id();
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216
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217 _LIBCPP_THREAD_ABI_VISIBILITY
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218 __libcpp_thread_id __libcpp_thread_get_id(const __libcpp_thread_t *__t);
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219
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220 _LIBCPP_THREAD_ABI_VISIBILITY
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221 int __libcpp_thread_join(__libcpp_thread_t *__t);
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222
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223 _LIBCPP_THREAD_ABI_VISIBILITY
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224 int __libcpp_thread_detach(__libcpp_thread_t *__t);
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225
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226 _LIBCPP_THREAD_ABI_VISIBILITY
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227 void __libcpp_thread_yield();
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228
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229 _LIBCPP_THREAD_ABI_VISIBILITY
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230 void __libcpp_thread_sleep_for(const chrono::nanoseconds& __ns);
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231
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232 // Thread local storage
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233 _LIBCPP_THREAD_ABI_VISIBILITY
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234 int __libcpp_tls_create(__libcpp_tls_key* __key,
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235 void(_LIBCPP_TLS_DESTRUCTOR_CC* __at_exit)(void*));
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236
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237 _LIBCPP_THREAD_ABI_VISIBILITY
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238 void *__libcpp_tls_get(__libcpp_tls_key __key);
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239
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240 _LIBCPP_THREAD_ABI_VISIBILITY
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241 int __libcpp_tls_set(__libcpp_tls_key __key, void *__p);
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242
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243 #endif // !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
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244
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245 #if (!defined(_LIBCPP_HAS_THREAD_LIBRARY_EXTERNAL) || \
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246 defined(_LIBCPP_BUILDING_THREAD_LIBRARY_EXTERNAL))
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247
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248 namespace __thread_detail {
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249
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250 inline __libcpp_timespec_t __convert_to_timespec(const chrono::nanoseconds& __ns)
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251 {
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252 using namespace chrono;
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253 seconds __s = duration_cast<seconds>(__ns);
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254 __libcpp_timespec_t __ts;
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255 typedef decltype(__ts.tv_sec) __ts_sec;
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256 const __ts_sec __ts_sec_max = numeric_limits<__ts_sec>::max();
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257
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258 if (__s.count() < __ts_sec_max)
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259 {
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260 __ts.tv_sec = static_cast<__ts_sec>(__s.count());
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261 __ts.tv_nsec = static_cast<decltype(__ts.tv_nsec)>((__ns - __s).count());
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262 }
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263 else
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264 {
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265 __ts.tv_sec = __ts_sec_max;
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266 __ts.tv_nsec = 999999999; // (10^9 - 1)
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267 }
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268
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269 return __ts;
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270 }
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271
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272 }
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273
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274 #if defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
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275
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276 int __libcpp_recursive_mutex_init(__libcpp_recursive_mutex_t *__m)
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277 {
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278 pthread_mutexattr_t attr;
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279 int __ec = pthread_mutexattr_init(&attr);
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280 if (__ec)
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281 return __ec;
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282 __ec = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
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283 if (__ec) {
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284 pthread_mutexattr_destroy(&attr);
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285 return __ec;
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286 }
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287 __ec = pthread_mutex_init(__m, &attr);
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288 if (__ec) {
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289 pthread_mutexattr_destroy(&attr);
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290 return __ec;
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291 }
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292 __ec = pthread_mutexattr_destroy(&attr);
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293 if (__ec) {
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294 pthread_mutex_destroy(__m);
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295 return __ec;
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296 }
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297 return 0;
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298 }
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299
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300 int __libcpp_recursive_mutex_lock(__libcpp_recursive_mutex_t *__m)
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301 {
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302 return pthread_mutex_lock(__m);
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303 }
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304
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305 bool __libcpp_recursive_mutex_trylock(__libcpp_recursive_mutex_t *__m)
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306 {
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307 return pthread_mutex_trylock(__m) == 0;
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308 }
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309
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310 int __libcpp_recursive_mutex_unlock(__libcpp_mutex_t *__m)
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311 {
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312 return pthread_mutex_unlock(__m);
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313 }
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314
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315 int __libcpp_recursive_mutex_destroy(__libcpp_recursive_mutex_t *__m)
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316 {
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317 return pthread_mutex_destroy(__m);
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318 }
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319
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320 int __libcpp_mutex_lock(__libcpp_mutex_t *__m)
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321 {
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322 return pthread_mutex_lock(__m);
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323 }
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324
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325 bool __libcpp_mutex_trylock(__libcpp_mutex_t *__m)
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326 {
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327 return pthread_mutex_trylock(__m) == 0;
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328 }
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329
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330 int __libcpp_mutex_unlock(__libcpp_mutex_t *__m)
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331 {
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332 return pthread_mutex_unlock(__m);
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333 }
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334
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335 int __libcpp_mutex_destroy(__libcpp_mutex_t *__m)
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336 {
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337 return pthread_mutex_destroy(__m);
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338 }
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339
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340 // Condition Variable
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341 int __libcpp_condvar_signal(__libcpp_condvar_t *__cv)
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342 {
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343 return pthread_cond_signal(__cv);
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344 }
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345
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346 int __libcpp_condvar_broadcast(__libcpp_condvar_t *__cv)
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347 {
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348 return pthread_cond_broadcast(__cv);
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349 }
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350
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351 int __libcpp_condvar_wait(__libcpp_condvar_t *__cv, __libcpp_mutex_t *__m)
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352 {
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353 return pthread_cond_wait(__cv, __m);
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354 }
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355
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356 int __libcpp_condvar_timedwait(__libcpp_condvar_t *__cv, __libcpp_mutex_t *__m,
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357 __libcpp_timespec_t *__ts)
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358 {
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359 return pthread_cond_timedwait(__cv, __m, __ts);
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360 }
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361
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362 int __libcpp_condvar_destroy(__libcpp_condvar_t *__cv)
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363 {
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364 return pthread_cond_destroy(__cv);
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365 }
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366
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367 // Execute once
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368 int __libcpp_execute_once(__libcpp_exec_once_flag *flag,
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369 void (*init_routine)()) {
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370 return pthread_once(flag, init_routine);
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371 }
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372
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373 // Thread id
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374 // Returns non-zero if the thread ids are equal, otherwise 0
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375 bool __libcpp_thread_id_equal(__libcpp_thread_id t1, __libcpp_thread_id t2)
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376 {
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377 return pthread_equal(t1, t2) != 0;
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378 }
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379
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380 // Returns non-zero if t1 < t2, otherwise 0
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381 bool __libcpp_thread_id_less(__libcpp_thread_id t1, __libcpp_thread_id t2)
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382 {
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383 return t1 < t2;
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384 }
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385
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386 // Thread
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387 bool __libcpp_thread_isnull(const __libcpp_thread_t *__t) {
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388 return *__t == 0;
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389 }
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390
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391 int __libcpp_thread_create(__libcpp_thread_t *__t, void *(*__func)(void *),
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392 void *__arg)
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393 {
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394 return pthread_create(__t, 0, __func, __arg);
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395 }
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396
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397 __libcpp_thread_id __libcpp_thread_get_current_id()
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398 {
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399 return pthread_self();
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400 }
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401
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402 __libcpp_thread_id __libcpp_thread_get_id(const __libcpp_thread_t *__t)
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403 {
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404 return *__t;
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405 }
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406
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407 int __libcpp_thread_join(__libcpp_thread_t *__t)
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408 {
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409 return pthread_join(*__t, 0);
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410 }
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411
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412 int __libcpp_thread_detach(__libcpp_thread_t *__t)
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413 {
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414 return pthread_detach(*__t);
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415 }
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416
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417 void __libcpp_thread_yield()
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418 {
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419 sched_yield();
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420 }
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421
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422 void __libcpp_thread_sleep_for(const chrono::nanoseconds& __ns)
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423 {
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424 __libcpp_timespec_t __ts = __thread_detail::__convert_to_timespec(__ns);
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425 while (nanosleep(&__ts, &__ts) == -1 && errno == EINTR);
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426 }
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427
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428 // Thread local storage
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429 int __libcpp_tls_create(__libcpp_tls_key *__key, void (*__at_exit)(void *))
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430 {
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431 return pthread_key_create(__key, __at_exit);
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432 }
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433
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434 void *__libcpp_tls_get(__libcpp_tls_key __key)
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435 {
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436 return pthread_getspecific(__key);
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437 }
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438
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439 int __libcpp_tls_set(__libcpp_tls_key __key, void *__p)
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440 {
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441 return pthread_setspecific(__key, __p);
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|
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442 }
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443
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444 #elif defined(_LIBCPP_HAS_THREAD_API_C11)
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445
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446 int __libcpp_recursive_mutex_init(__libcpp_recursive_mutex_t *__m)
|
|
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447 {
|
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448 return mtx_init(__m, mtx_plain | mtx_recursive) == thrd_success ? 0 : EINVAL;
|
|
|
449 }
|
|
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450
|
|
|
451 int __libcpp_recursive_mutex_lock(__libcpp_recursive_mutex_t *__m)
|
|
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452 {
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|
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453 return mtx_lock(__m) == thrd_success ? 0 : EINVAL;
|
|
|
454 }
|
|
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455
|
|
|
456 bool __libcpp_recursive_mutex_trylock(__libcpp_recursive_mutex_t *__m)
|
|
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457 {
|
|
|
458 return mtx_trylock(__m) == thrd_success;
|
|
|
459 }
|
|
|
460
|
|
|
461 int __libcpp_recursive_mutex_unlock(__libcpp_mutex_t *__m)
|
|
|
462 {
|
|
|
463 return mtx_unlock(__m) == thrd_success ? 0 : EINVAL;
|
|
|
464 }
|
|
|
465
|
|
|
466 int __libcpp_recursive_mutex_destroy(__libcpp_recursive_mutex_t *__m)
|
|
|
467 {
|
|
|
468 mtx_destroy(__m);
|
|
|
469 return 0;
|
|
|
470 }
|
|
|
471
|
|
|
472 int __libcpp_mutex_lock(__libcpp_mutex_t *__m)
|
|
|
473 {
|
|
|
474 return mtx_lock(__m) == thrd_success ? 0 : EINVAL;
|
|
|
475 }
|
|
|
476
|
|
|
477 bool __libcpp_mutex_trylock(__libcpp_mutex_t *__m)
|
|
|
478 {
|
|
|
479 return mtx_trylock(__m) == thrd_success;
|
|
|
480 }
|
|
|
481
|
|
|
482 int __libcpp_mutex_unlock(__libcpp_mutex_t *__m)
|
|
|
483 {
|
|
|
484 return mtx_unlock(__m) == thrd_success ? 0 : EINVAL;
|
|
|
485 }
|
|
|
486
|
|
|
487 int __libcpp_mutex_destroy(__libcpp_mutex_t *__m)
|
|
|
488 {
|
|
|
489 mtx_destroy(__m);
|
|
|
490 return 0;
|
|
|
491 }
|
|
|
492
|
|
|
493 // Condition Variable
|
|
|
494 int __libcpp_condvar_signal(__libcpp_condvar_t *__cv)
|
|
|
495 {
|
|
|
496 return cnd_signal(__cv) == thrd_success ? 0 : EINVAL;
|
|
|
497 }
|
|
|
498
|
|
|
499 int __libcpp_condvar_broadcast(__libcpp_condvar_t *__cv)
|
|
|
500 {
|
|
|
501 return cnd_broadcast(__cv) == thrd_success ? 0 : EINVAL;
|
|
|
502 }
|
|
|
503
|
|
|
504 int __libcpp_condvar_wait(__libcpp_condvar_t *__cv, __libcpp_mutex_t *__m)
|
|
|
505 {
|
|
|
506 return cnd_wait(__cv, __m) == thrd_success ? 0 : EINVAL;
|
|
|
507 }
|
|
|
508
|
|
|
509 int __libcpp_condvar_timedwait(__libcpp_condvar_t *__cv, __libcpp_mutex_t *__m,
|
|
|
510 timespec *__ts)
|
|
|
511 {
|
|
|
512 int __ec = cnd_timedwait(__cv, __m, __ts);
|
|
|
513 return __ec == thrd_timedout ? ETIMEDOUT : __ec;
|
|
|
514 }
|
|
|
515
|
|
|
516 int __libcpp_condvar_destroy(__libcpp_condvar_t *__cv)
|
|
|
517 {
|
|
|
518 cnd_destroy(__cv);
|
|
|
519 return 0;
|
|
|
520 }
|
|
|
521
|
|
|
522 // Execute once
|
|
|
523 int __libcpp_execute_once(__libcpp_exec_once_flag *flag,
|
|
|
524 void (*init_routine)(void)) {
|
|
|
525 ::call_once(flag, init_routine);
|
|
|
526 return 0;
|
|
|
527 }
|
|
|
528
|
|
|
529 // Thread id
|
|
|
530 // Returns non-zero if the thread ids are equal, otherwise 0
|
|
|
531 bool __libcpp_thread_id_equal(__libcpp_thread_id t1, __libcpp_thread_id t2)
|
|
|
532 {
|
|
|
533 return thrd_equal(t1, t2) != 0;
|
|
|
534 }
|
|
|
535
|
|
|
536 // Returns non-zero if t1 < t2, otherwise 0
|
|
|
537 bool __libcpp_thread_id_less(__libcpp_thread_id t1, __libcpp_thread_id t2)
|
|
|
538 {
|
|
|
539 return t1 < t2;
|
|
|
540 }
|
|
|
541
|
|
|
542 // Thread
|
|
|
543 bool __libcpp_thread_isnull(const __libcpp_thread_t *__t) {
|
|
|
544 return *__t == 0;
|
|
|
545 }
|
|
|
546
|
|
|
547 int __libcpp_thread_create(__libcpp_thread_t *__t, void *(*__func)(void *),
|
|
|
548 void *__arg)
|
|
|
549 {
|
|
|
550 int __ec = thrd_create(__t, reinterpret_cast<thrd_start_t>(__func), __arg);
|
|
|
551 return __ec == thrd_nomem ? ENOMEM : __ec;
|
|
|
552 }
|
|
|
553
|
|
|
554 __libcpp_thread_id __libcpp_thread_get_current_id()
|
|
|
555 {
|
|
|
556 return thrd_current();
|
|
|
557 }
|
|
|
558
|
|
|
559 __libcpp_thread_id __libcpp_thread_get_id(const __libcpp_thread_t *__t)
|
|
|
560 {
|
|
|
561 return *__t;
|
|
|
562 }
|
|
|
563
|
|
|
564 int __libcpp_thread_join(__libcpp_thread_t *__t)
|
|
|
565 {
|
|
|
566 return thrd_join(*__t, nullptr) == thrd_success ? 0 : EINVAL;
|
|
|
567 }
|
|
|
568
|
|
|
569 int __libcpp_thread_detach(__libcpp_thread_t *__t)
|
|
|
570 {
|
|
|
571 return thrd_detach(*__t) == thrd_success ? 0 : EINVAL;
|
|
|
572 }
|
|
|
573
|
|
|
574 void __libcpp_thread_yield()
|
|
|
575 {
|
|
|
576 thrd_yield();
|
|
|
577 }
|
|
|
578
|
|
|
579 void __libcpp_thread_sleep_for(const chrono::nanoseconds& __ns)
|
|
|
580 {
|
|
|
581 __libcpp_timespec_t __ts = __thread_detail::__convert_to_timespec(__ns);
|
|
|
582 thrd_sleep(&__ts, nullptr);
|
|
|
583 }
|
|
|
584
|
|
|
585 // Thread local storage
|
|
|
586 int __libcpp_tls_create(__libcpp_tls_key *__key, void (*__at_exit)(void *))
|
|
|
587 {
|
|
|
588 return tss_create(__key, __at_exit) == thrd_success ? 0 : EINVAL;
|
|
|
589 }
|
|
|
590
|
|
|
591 void *__libcpp_tls_get(__libcpp_tls_key __key)
|
|
|
592 {
|
|
|
593 return tss_get(__key);
|
|
|
594 }
|
|
|
595
|
|
|
596 int __libcpp_tls_set(__libcpp_tls_key __key, void *__p)
|
|
|
597 {
|
|
|
598 return tss_set(__key, __p) == thrd_success ? 0 : EINVAL;
|
|
|
599 }
|
|
|
600
|
|
|
601 #endif
|
|
|
602
|
|
|
603 #endif // !_LIBCPP_HAS_THREAD_LIBRARY_EXTERNAL || _LIBCPP_BUILDING_THREAD_LIBRARY_EXTERNAL
|
|
|
604
|
|
|
605 class _LIBCPP_TYPE_VIS thread;
|
|
|
606 class _LIBCPP_TYPE_VIS __thread_id;
|
|
|
607
|
|
|
608 namespace this_thread
|
|
|
609 {
|
|
|
610
|
|
|
611 _LIBCPP_INLINE_VISIBILITY __thread_id get_id() _NOEXCEPT;
|
|
|
612
|
|
|
613 } // this_thread
|
|
|
614
|
|
|
615 template<> struct hash<__thread_id>;
|
|
|
616
|
|
|
617 class _LIBCPP_TEMPLATE_VIS __thread_id
|
|
|
618 {
|
|
|
619 // FIXME: pthread_t is a pointer on Darwin but a long on Linux.
|
|
|
620 // NULL is the no-thread value on Darwin. Someone needs to check
|
|
|
621 // on other platforms. We assume 0 works everywhere for now.
|
|
|
622 __libcpp_thread_id __id_;
|
|
|
623
|
|
|
624 public:
|
|
|
625 _LIBCPP_INLINE_VISIBILITY
|
|
|
626 __thread_id() _NOEXCEPT : __id_(0) {}
|
|
|
627
|
|
|
628 friend _LIBCPP_INLINE_VISIBILITY
|
|
|
629 bool operator==(__thread_id __x, __thread_id __y) _NOEXCEPT
|
|
|
630 { // don't pass id==0 to underlying routines
|
|
|
631 if (__x.__id_ == 0) return __y.__id_ == 0;
|
|
|
632 if (__y.__id_ == 0) return false;
|
|
|
633 return __libcpp_thread_id_equal(__x.__id_, __y.__id_);
|
|
|
634 }
|
|
|
635 friend _LIBCPP_INLINE_VISIBILITY
|
|
|
636 bool operator!=(__thread_id __x, __thread_id __y) _NOEXCEPT
|
|
|
637 {return !(__x == __y);}
|
|
|
638 friend _LIBCPP_INLINE_VISIBILITY
|
|
|
639 bool operator< (__thread_id __x, __thread_id __y) _NOEXCEPT
|
|
|
640 { // id==0 is always less than any other thread_id
|
|
|
641 if (__x.__id_ == 0) return __y.__id_ != 0;
|
|
|
642 if (__y.__id_ == 0) return false;
|
|
|
643 return __libcpp_thread_id_less(__x.__id_, __y.__id_);
|
|
|
644 }
|
|
|
645 friend _LIBCPP_INLINE_VISIBILITY
|
|
|
646 bool operator<=(__thread_id __x, __thread_id __y) _NOEXCEPT
|
|
|
647 {return !(__y < __x);}
|
|
|
648 friend _LIBCPP_INLINE_VISIBILITY
|
|
|
649 bool operator> (__thread_id __x, __thread_id __y) _NOEXCEPT
|
|
|
650 {return __y < __x ;}
|
|
|
651 friend _LIBCPP_INLINE_VISIBILITY
|
|
|
652 bool operator>=(__thread_id __x, __thread_id __y) _NOEXCEPT
|
|
|
653 {return !(__x < __y);}
|
|
|
654
|
|
|
655 _LIBCPP_INLINE_VISIBILITY
|
|
|
656 void __reset() { __id_ = 0; }
|
|
|
657
|
|
|
658 template<class _CharT, class _Traits>
|
|
|
659 friend
|
|
|
660 _LIBCPP_INLINE_VISIBILITY
|
|
|
661 basic_ostream<_CharT, _Traits>&
|
|
|
662 operator<<(basic_ostream<_CharT, _Traits>& __os, __thread_id __id);
|
|
|
663
|
|
|
664 private:
|
|
|
665 _LIBCPP_INLINE_VISIBILITY
|
|
|
666 __thread_id(__libcpp_thread_id __id) : __id_(__id) {}
|
|
|
667
|
|
|
668 friend __thread_id this_thread::get_id() _NOEXCEPT;
|
|
|
669 friend class _LIBCPP_TYPE_VIS thread;
|
|
|
670 friend struct _LIBCPP_TEMPLATE_VIS hash<__thread_id>;
|
|
|
671 };
|
|
|
672
|
|
|
673 namespace this_thread
|
|
|
674 {
|
|
|
675
|
|
|
676 inline _LIBCPP_INLINE_VISIBILITY
|
|
|
677 __thread_id
|
|
|
678 get_id() _NOEXCEPT
|
|
|
679 {
|
|
|
680 return __libcpp_thread_get_current_id();
|
|
|
681 }
|
|
|
682
|
|
|
683 } // this_thread
|
|
|
684
|
|
|
685 #endif // !_LIBCPP_HAS_NO_THREADS
|
|
|
686
|
|
|
687 _LIBCPP_END_NAMESPACE_STD
|
|
|
688
|
|
|
689 _LIBCPP_POP_MACROS
|
|
|
690
|
|
|
691 #endif // _LIBCPP_THREADING_SUPPORT
|
