1 | // -*- C++ -*- header.
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2 |
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3 | // Copyright (C) 2008-2021 Free Software Foundation, Inc.
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4 | //
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5 | // This file is part of the GNU ISO C++ Library. This library is free
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6 | // software; you can redistribute it and/or modify it under the
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7 | // terms of the GNU General Public License as published by the
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8 | // Free Software Foundation; either version 3, or (at your option)
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9 | // any later version.
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10 |
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11 | // This library is distributed in the hope that it will be useful,
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12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | // GNU General Public License for more details.
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15 |
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16 | // Under Section 7 of GPL version 3, you are granted additional
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17 | // permissions described in the GCC Runtime Library Exception, version
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18 | // 3.1, as published by the Free Software Foundation.
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19 |
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20 | // You should have received a copy of the GNU General Public License and
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21 | // a copy of the GCC Runtime Library Exception along with this program;
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22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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23 | // <http://www.gnu.org/licenses/>.
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24 |
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25 | /** @file include/atomic
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26 | * This is a Standard C++ Library header.
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27 | */
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28 |
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29 | // Based on "C++ Atomic Types and Operations" by Hans Boehm and Lawrence Crowl.
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30 | // http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2427.html
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31 |
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32 | #ifndef _GLIBCXX_ATOMIC
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33 | #define _GLIBCXX_ATOMIC 1
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34 |
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35 | #pragma GCC system_header
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36 |
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37 | #if __cplusplus < 201103L
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38 | # include <bits/c++0x_warning.h>
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39 | #else
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40 |
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41 | #include <bits/atomic_base.h>
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42 |
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43 | namespace std _GLIBCXX_VISIBILITY(default)
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44 | {
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45 | _GLIBCXX_BEGIN_NAMESPACE_VERSION
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46 |
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47 | /**
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48 | * @addtogroup atomics
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49 | * @{
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50 | */
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51 |
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52 | #if __cplusplus >= 201703L
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53 | # define __cpp_lib_atomic_is_always_lock_free 201603
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54 | #endif
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55 |
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56 | template<typename _Tp>
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57 | struct atomic;
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58 |
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59 | /// atomic<bool>
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60 | // NB: No operators or fetch-operations for this type.
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61 | template<>
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62 | struct atomic<bool>
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63 | {
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64 | using value_type = bool;
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65 |
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66 | private:
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67 | __atomic_base<bool> _M_base;
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68 |
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69 | public:
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70 | atomic() noexcept = default;
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71 | ~atomic() noexcept = default;
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72 | atomic(const atomic&) = delete;
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73 | atomic& operator=(const atomic&) = delete;
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74 | atomic& operator=(const atomic&) volatile = delete;
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75 |
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76 | constexpr atomic(bool __i) noexcept : _M_base(__i) { }
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77 |
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78 | bool
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79 | operator=(bool __i) noexcept
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80 | { return _M_base.operator=(__i); }
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81 |
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82 | bool
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83 | operator=(bool __i) volatile noexcept
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84 | { return _M_base.operator=(__i); }
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85 |
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86 | operator bool() const noexcept
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87 | { return _M_base.load(); }
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88 |
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89 | operator bool() const volatile noexcept
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90 | { return _M_base.load(); }
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91 |
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92 | bool
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93 | is_lock_free() const noexcept { return _M_base.is_lock_free(); }
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94 |
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95 | bool
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96 | is_lock_free() const volatile noexcept { return _M_base.is_lock_free(); }
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97 |
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98 | #if __cplusplus >= 201703L
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99 | static constexpr bool is_always_lock_free = ATOMIC_BOOL_LOCK_FREE == 2;
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100 | #endif
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101 |
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102 | void
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103 | store(bool __i, memory_order __m = memory_order_seq_cst) noexcept
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104 | { _M_base.store(__i, __m); }
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105 |
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106 | void
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107 | store(bool __i, memory_order __m = memory_order_seq_cst) volatile noexcept
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108 | { _M_base.store(__i, __m); }
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109 |
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110 | bool
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111 | load(memory_order __m = memory_order_seq_cst) const noexcept
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112 | { return _M_base.load(__m); }
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113 |
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114 | bool
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115 | load(memory_order __m = memory_order_seq_cst) const volatile noexcept
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116 | { return _M_base.load(__m); }
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117 |
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118 | bool
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119 | exchange(bool __i, memory_order __m = memory_order_seq_cst) noexcept
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120 | { return _M_base.exchange(__i, __m); }
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121 |
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122 | bool
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123 | exchange(bool __i,
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124 | memory_order __m = memory_order_seq_cst) volatile noexcept
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125 | { return _M_base.exchange(__i, __m); }
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126 |
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127 | bool
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128 | compare_exchange_weak(bool& __i1, bool __i2, memory_order __m1,
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129 | memory_order __m2) noexcept
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130 | { return _M_base.compare_exchange_weak(__i1, __i2, __m1, __m2); }
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131 |
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132 | bool
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133 | compare_exchange_weak(bool& __i1, bool __i2, memory_order __m1,
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134 | memory_order __m2) volatile noexcept
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135 | { return _M_base.compare_exchange_weak(__i1, __i2, __m1, __m2); }
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136 |
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137 | bool
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138 | compare_exchange_weak(bool& __i1, bool __i2,
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139 | memory_order __m = memory_order_seq_cst) noexcept
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140 | { return _M_base.compare_exchange_weak(__i1, __i2, __m); }
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141 |
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142 | bool
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143 | compare_exchange_weak(bool& __i1, bool __i2,
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144 | memory_order __m = memory_order_seq_cst) volatile noexcept
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145 | { return _M_base.compare_exchange_weak(__i1, __i2, __m); }
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146 |
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147 | bool
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148 | compare_exchange_strong(bool& __i1, bool __i2, memory_order __m1,
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149 | memory_order __m2) noexcept
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150 | { return _M_base.compare_exchange_strong(__i1, __i2, __m1, __m2); }
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151 |
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152 | bool
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153 | compare_exchange_strong(bool& __i1, bool __i2, memory_order __m1,
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154 | memory_order __m2) volatile noexcept
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155 | { return _M_base.compare_exchange_strong(__i1, __i2, __m1, __m2); }
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156 |
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157 | bool
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158 | compare_exchange_strong(bool& __i1, bool __i2,
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159 | memory_order __m = memory_order_seq_cst) noexcept
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160 | { return _M_base.compare_exchange_strong(__i1, __i2, __m); }
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161 |
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162 | bool
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163 | compare_exchange_strong(bool& __i1, bool __i2,
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164 | memory_order __m = memory_order_seq_cst) volatile noexcept
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165 | { return _M_base.compare_exchange_strong(__i1, __i2, __m); }
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166 |
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167 | #if __cpp_lib_atomic_wait
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168 | void
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169 | wait(bool __old, memory_order __m = memory_order_seq_cst) const noexcept
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170 | { _M_base.wait(__old, __m); }
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171 |
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172 | // TODO add const volatile overload
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173 |
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174 | void
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175 | notify_one() const noexcept
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176 | { _M_base.notify_one(); }
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177 |
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178 | void
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179 | notify_all() const noexcept
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180 | { _M_base.notify_all(); }
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181 | #endif // __cpp_lib_atomic_wait
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182 | };
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183 |
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184 | #if __cplusplus <= 201703L
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185 | # define _GLIBCXX20_INIT(I)
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186 | #else
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187 | # define _GLIBCXX20_INIT(I) = I
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188 | #endif
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189 |
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190 | /**
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191 | * @brief Generic atomic type, primary class template.
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192 | *
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193 | * @tparam _Tp Type to be made atomic, must be trivially copyable.
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194 | */
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195 | template<typename _Tp>
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196 | struct atomic
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197 | {
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198 | using value_type = _Tp;
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199 |
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200 | private:
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201 | // Align 1/2/4/8/16-byte types to at least their size.
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202 | static constexpr int _S_min_alignment
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203 | = (sizeof(_Tp) & (sizeof(_Tp) - 1)) || sizeof(_Tp) > 16
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204 | ? 0 : sizeof(_Tp);
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205 |
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206 | static constexpr int _S_alignment
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207 | = _S_min_alignment > alignof(_Tp) ? _S_min_alignment : alignof(_Tp);
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208 |
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209 | alignas(_S_alignment) _Tp _M_i _GLIBCXX20_INIT(_Tp());
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210 |
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211 | static_assert(__is_trivially_copyable(_Tp),
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212 | "std::atomic requires a trivially copyable type");
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213 |
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214 | static_assert(sizeof(_Tp) > 0,
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215 | "Incomplete or zero-sized types are not supported");
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216 |
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217 | #if __cplusplus > 201703L
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218 | static_assert(is_copy_constructible_v<_Tp>);
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219 | static_assert(is_move_constructible_v<_Tp>);
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220 | static_assert(is_copy_assignable_v<_Tp>);
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221 | static_assert(is_move_assignable_v<_Tp>);
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222 | #endif
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223 |
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224 | public:
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225 | atomic() = default;
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226 | ~atomic() noexcept = default;
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227 | atomic(const atomic&) = delete;
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228 | atomic& operator=(const atomic&) = delete;
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229 | atomic& operator=(const atomic&) volatile = delete;
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230 |
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231 | constexpr atomic(_Tp __i) noexcept : _M_i(__i) { }
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232 |
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233 | operator _Tp() const noexcept
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234 | { return load(); }
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235 |
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236 | operator _Tp() const volatile noexcept
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237 | { return load(); }
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238 |
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239 | _Tp
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240 | operator=(_Tp __i) noexcept
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241 | { store(__i); return __i; }
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242 |
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243 | _Tp
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244 | operator=(_Tp __i) volatile noexcept
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245 | { store(__i); return __i; }
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246 |
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247 | bool
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248 | is_lock_free() const noexcept
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249 | {
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250 | // Produce a fake, minimally aligned pointer.
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251 | return __atomic_is_lock_free(sizeof(_M_i),
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252 | reinterpret_cast<void *>(-_S_alignment));
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253 | }
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254 |
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255 | bool
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256 | is_lock_free() const volatile noexcept
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257 | {
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258 | // Produce a fake, minimally aligned pointer.
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259 | return __atomic_is_lock_free(sizeof(_M_i),
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260 | reinterpret_cast<void *>(-_S_alignment));
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261 | }
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262 |
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263 | #if __cplusplus >= 201703L
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264 | static constexpr bool is_always_lock_free
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265 | = __atomic_always_lock_free(sizeof(_M_i), 0);
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266 | #endif
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267 |
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268 | void
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269 | store(_Tp __i, memory_order __m = memory_order_seq_cst) noexcept
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270 | {
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271 | __atomic_store(std::__addressof(_M_i), std::__addressof(__i), int(__m));
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272 | }
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273 |
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274 | void
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275 | store(_Tp __i, memory_order __m = memory_order_seq_cst) volatile noexcept
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276 | {
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277 | __atomic_store(std::__addressof(_M_i), std::__addressof(__i), int(__m));
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278 | }
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279 |
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280 | _Tp
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281 | load(memory_order __m = memory_order_seq_cst) const noexcept
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282 | {
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283 | alignas(_Tp) unsigned char __buf[sizeof(_Tp)];
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284 | _Tp* __ptr = reinterpret_cast<_Tp*>(__buf);
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285 | __atomic_load(std::__addressof(_M_i), __ptr, int(__m));
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286 | return *__ptr;
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287 | }
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288 |
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289 | _Tp
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290 | load(memory_order __m = memory_order_seq_cst) const volatile noexcept
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291 | {
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292 | alignas(_Tp) unsigned char __buf[sizeof(_Tp)];
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293 | _Tp* __ptr = reinterpret_cast<_Tp*>(__buf);
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294 | __atomic_load(std::__addressof(_M_i), __ptr, int(__m));
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295 | return *__ptr;
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296 | }
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297 |
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298 | _Tp
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299 | exchange(_Tp __i, memory_order __m = memory_order_seq_cst) noexcept
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300 | {
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301 | alignas(_Tp) unsigned char __buf[sizeof(_Tp)];
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302 | _Tp* __ptr = reinterpret_cast<_Tp*>(__buf);
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303 | __atomic_exchange(std::__addressof(_M_i), std::__addressof(__i),
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304 | __ptr, int(__m));
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305 | return *__ptr;
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306 | }
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307 |
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308 | _Tp
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309 | exchange(_Tp __i,
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310 | memory_order __m = memory_order_seq_cst) volatile noexcept
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311 | {
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312 | alignas(_Tp) unsigned char __buf[sizeof(_Tp)];
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313 | _Tp* __ptr = reinterpret_cast<_Tp*>(__buf);
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314 | __atomic_exchange(std::__addressof(_M_i), std::__addressof(__i),
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315 | __ptr, int(__m));
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316 | return *__ptr;
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317 | }
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318 |
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319 | bool
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320 | compare_exchange_weak(_Tp& __e, _Tp __i, memory_order __s,
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321 | memory_order __f) noexcept
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322 | {
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323 | return __atomic_compare_exchange(std::__addressof(_M_i),
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324 | std::__addressof(__e),
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325 | std::__addressof(__i),
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326 | true, int(__s), int(__f));
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327 | }
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328 |
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329 | bool
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330 | compare_exchange_weak(_Tp& __e, _Tp __i, memory_order __s,
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331 | memory_order __f) volatile noexcept
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332 | {
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333 | return __atomic_compare_exchange(std::__addressof(_M_i),
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334 | std::__addressof(__e),
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335 | std::__addressof(__i),
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336 | true, int(__s), int(__f));
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337 | }
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338 |
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339 | bool
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340 | compare_exchange_weak(_Tp& __e, _Tp __i,
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341 | memory_order __m = memory_order_seq_cst) noexcept
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342 | { return compare_exchange_weak(__e, __i, __m,
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343 | __cmpexch_failure_order(__m)); }
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344 |
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345 | bool
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346 | compare_exchange_weak(_Tp& __e, _Tp __i,
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347 | memory_order __m = memory_order_seq_cst) volatile noexcept
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348 | { return compare_exchange_weak(__e, __i, __m,
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349 | __cmpexch_failure_order(__m)); }
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350 |
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351 | bool
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352 | compare_exchange_strong(_Tp& __e, _Tp __i, memory_order __s,
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353 | memory_order __f) noexcept
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354 | {
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355 | return __atomic_compare_exchange(std::__addressof(_M_i),
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356 | std::__addressof(__e),
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357 | std::__addressof(__i),
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358 | false, int(__s), int(__f));
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359 | }
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360 |
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361 | bool
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362 | compare_exchange_strong(_Tp& __e, _Tp __i, memory_order __s,
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363 | memory_order __f) volatile noexcept
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364 | {
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365 | return __atomic_compare_exchange(std::__addressof(_M_i),
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366 | std::__addressof(__e),
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367 | std::__addressof(__i),
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368 | false, int(__s), int(__f));
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369 | }
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370 |
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371 | bool
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372 | compare_exchange_strong(_Tp& __e, _Tp __i,
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373 | memory_order __m = memory_order_seq_cst) noexcept
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374 | { return compare_exchange_strong(__e, __i, __m,
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375 | __cmpexch_failure_order(__m)); }
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376 |
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377 | bool
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378 | compare_exchange_strong(_Tp& __e, _Tp __i,
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379 | memory_order __m = memory_order_seq_cst) volatile noexcept
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380 | { return compare_exchange_strong(__e, __i, __m,
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381 | __cmpexch_failure_order(__m)); }
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382 |
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383 | #if __cpp_lib_atomic_wait
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384 | void
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385 | wait(_Tp __old, memory_order __m = memory_order_seq_cst) const noexcept
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386 | {
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387 | std::__atomic_wait_address_v(&_M_i, __old,
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388 | [__m, this] { return this->load(__m); });
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389 | }
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390 |
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391 | // TODO add const volatile overload
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392 |
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393 | void
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394 | notify_one() const noexcept
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395 | { std::__atomic_notify_address(&_M_i, false); }
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396 |
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397 | void
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398 | notify_all() const noexcept
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399 | { std::__atomic_notify_address(&_M_i, true); }
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400 | #endif // __cpp_lib_atomic_wait
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401 |
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402 | };
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403 | #undef _GLIBCXX20_INIT
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404 |
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405 | /// Partial specialization for pointer types.
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406 | template<typename _Tp>
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407 | struct atomic<_Tp*>
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408 | {
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409 | using value_type = _Tp*;
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410 | using difference_type = ptrdiff_t;
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411 |
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412 | typedef _Tp* __pointer_type;
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413 | typedef __atomic_base<_Tp*> __base_type;
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414 | __base_type _M_b;
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415 |
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416 | atomic() noexcept = default;
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417 | ~atomic() noexcept = default;
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418 | atomic(const atomic&) = delete;
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419 | atomic& operator=(const atomic&) = delete;
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420 | atomic& operator=(const atomic&) volatile = delete;
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421 |
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422 | constexpr atomic(__pointer_type __p) noexcept : _M_b(__p) { }
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423 |
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424 | operator __pointer_type() const noexcept
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425 | { return __pointer_type(_M_b); }
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426 |
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427 | operator __pointer_type() const volatile noexcept
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428 | { return __pointer_type(_M_b); }
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429 |
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430 | __pointer_type
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431 | operator=(__pointer_type __p) noexcept
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432 | { return _M_b.operator=(__p); }
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433 |
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434 | __pointer_type
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435 | operator=(__pointer_type __p) volatile noexcept
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436 | { return _M_b.operator=(__p); }
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437 |
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438 | __pointer_type
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439 | operator++(int) noexcept
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440 | {
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441 | #if __cplusplus >= 201703L
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442 | static_assert( is_object<_Tp>::value, "pointer to object type" );
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443 | #endif
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444 | return _M_b++;
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445 | }
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446 |
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447 | __pointer_type
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448 | operator++(int) volatile noexcept
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449 | {
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450 | #if __cplusplus >= 201703L
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451 | static_assert( is_object<_Tp>::value, "pointer to object type" );
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452 | #endif
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453 | return _M_b++;
|
---|
454 | }
|
---|
455 |
|
---|
456 | __pointer_type
|
---|
457 | operator--(int) noexcept
|
---|
458 | {
|
---|
459 | #if __cplusplus >= 201703L
|
---|
460 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
461 | #endif
|
---|
462 | return _M_b--;
|
---|
463 | }
|
---|
464 |
|
---|
465 | __pointer_type
|
---|
466 | operator--(int) volatile noexcept
|
---|
467 | {
|
---|
468 | #if __cplusplus >= 201703L
|
---|
469 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
470 | #endif
|
---|
471 | return _M_b--;
|
---|
472 | }
|
---|
473 |
|
---|
474 | __pointer_type
|
---|
475 | operator++() noexcept
|
---|
476 | {
|
---|
477 | #if __cplusplus >= 201703L
|
---|
478 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
479 | #endif
|
---|
480 | return ++_M_b;
|
---|
481 | }
|
---|
482 |
|
---|
483 | __pointer_type
|
---|
484 | operator++() volatile noexcept
|
---|
485 | {
|
---|
486 | #if __cplusplus >= 201703L
|
---|
487 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
488 | #endif
|
---|
489 | return ++_M_b;
|
---|
490 | }
|
---|
491 |
|
---|
492 | __pointer_type
|
---|
493 | operator--() noexcept
|
---|
494 | {
|
---|
495 | #if __cplusplus >= 201703L
|
---|
496 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
497 | #endif
|
---|
498 | return --_M_b;
|
---|
499 | }
|
---|
500 |
|
---|
501 | __pointer_type
|
---|
502 | operator--() volatile noexcept
|
---|
503 | {
|
---|
504 | #if __cplusplus >= 201703L
|
---|
505 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
506 | #endif
|
---|
507 | return --_M_b;
|
---|
508 | }
|
---|
509 |
|
---|
510 | __pointer_type
|
---|
511 | operator+=(ptrdiff_t __d) noexcept
|
---|
512 | {
|
---|
513 | #if __cplusplus >= 201703L
|
---|
514 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
515 | #endif
|
---|
516 | return _M_b.operator+=(__d);
|
---|
517 | }
|
---|
518 |
|
---|
519 | __pointer_type
|
---|
520 | operator+=(ptrdiff_t __d) volatile noexcept
|
---|
521 | {
|
---|
522 | #if __cplusplus >= 201703L
|
---|
523 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
524 | #endif
|
---|
525 | return _M_b.operator+=(__d);
|
---|
526 | }
|
---|
527 |
|
---|
528 | __pointer_type
|
---|
529 | operator-=(ptrdiff_t __d) noexcept
|
---|
530 | {
|
---|
531 | #if __cplusplus >= 201703L
|
---|
532 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
533 | #endif
|
---|
534 | return _M_b.operator-=(__d);
|
---|
535 | }
|
---|
536 |
|
---|
537 | __pointer_type
|
---|
538 | operator-=(ptrdiff_t __d) volatile noexcept
|
---|
539 | {
|
---|
540 | #if __cplusplus >= 201703L
|
---|
541 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
542 | #endif
|
---|
543 | return _M_b.operator-=(__d);
|
---|
544 | }
|
---|
545 |
|
---|
546 | bool
|
---|
547 | is_lock_free() const noexcept
|
---|
548 | { return _M_b.is_lock_free(); }
|
---|
549 |
|
---|
550 | bool
|
---|
551 | is_lock_free() const volatile noexcept
|
---|
552 | { return _M_b.is_lock_free(); }
|
---|
553 |
|
---|
554 | #if __cplusplus >= 201703L
|
---|
555 | static constexpr bool is_always_lock_free = ATOMIC_POINTER_LOCK_FREE == 2;
|
---|
556 | #endif
|
---|
557 |
|
---|
558 | void
|
---|
559 | store(__pointer_type __p,
|
---|
560 | memory_order __m = memory_order_seq_cst) noexcept
|
---|
561 | { return _M_b.store(__p, __m); }
|
---|
562 |
|
---|
563 | void
|
---|
564 | store(__pointer_type __p,
|
---|
565 | memory_order __m = memory_order_seq_cst) volatile noexcept
|
---|
566 | { return _M_b.store(__p, __m); }
|
---|
567 |
|
---|
568 | __pointer_type
|
---|
569 | load(memory_order __m = memory_order_seq_cst) const noexcept
|
---|
570 | { return _M_b.load(__m); }
|
---|
571 |
|
---|
572 | __pointer_type
|
---|
573 | load(memory_order __m = memory_order_seq_cst) const volatile noexcept
|
---|
574 | { return _M_b.load(__m); }
|
---|
575 |
|
---|
576 | __pointer_type
|
---|
577 | exchange(__pointer_type __p,
|
---|
578 | memory_order __m = memory_order_seq_cst) noexcept
|
---|
579 | { return _M_b.exchange(__p, __m); }
|
---|
580 |
|
---|
581 | __pointer_type
|
---|
582 | exchange(__pointer_type __p,
|
---|
583 | memory_order __m = memory_order_seq_cst) volatile noexcept
|
---|
584 | { return _M_b.exchange(__p, __m); }
|
---|
585 |
|
---|
586 | bool
|
---|
587 | compare_exchange_weak(__pointer_type& __p1, __pointer_type __p2,
|
---|
588 | memory_order __m1, memory_order __m2) noexcept
|
---|
589 | { return _M_b.compare_exchange_strong(__p1, __p2, __m1, __m2); }
|
---|
590 |
|
---|
591 | bool
|
---|
592 | compare_exchange_weak(__pointer_type& __p1, __pointer_type __p2,
|
---|
593 | memory_order __m1,
|
---|
594 | memory_order __m2) volatile noexcept
|
---|
595 | { return _M_b.compare_exchange_strong(__p1, __p2, __m1, __m2); }
|
---|
596 |
|
---|
597 | bool
|
---|
598 | compare_exchange_weak(__pointer_type& __p1, __pointer_type __p2,
|
---|
599 | memory_order __m = memory_order_seq_cst) noexcept
|
---|
600 | {
|
---|
601 | return compare_exchange_weak(__p1, __p2, __m,
|
---|
602 | __cmpexch_failure_order(__m));
|
---|
603 | }
|
---|
604 |
|
---|
605 | bool
|
---|
606 | compare_exchange_weak(__pointer_type& __p1, __pointer_type __p2,
|
---|
607 | memory_order __m = memory_order_seq_cst) volatile noexcept
|
---|
608 | {
|
---|
609 | return compare_exchange_weak(__p1, __p2, __m,
|
---|
610 | __cmpexch_failure_order(__m));
|
---|
611 | }
|
---|
612 |
|
---|
613 | bool
|
---|
614 | compare_exchange_strong(__pointer_type& __p1, __pointer_type __p2,
|
---|
615 | memory_order __m1, memory_order __m2) noexcept
|
---|
616 | { return _M_b.compare_exchange_strong(__p1, __p2, __m1, __m2); }
|
---|
617 |
|
---|
618 | bool
|
---|
619 | compare_exchange_strong(__pointer_type& __p1, __pointer_type __p2,
|
---|
620 | memory_order __m1,
|
---|
621 | memory_order __m2) volatile noexcept
|
---|
622 | { return _M_b.compare_exchange_strong(__p1, __p2, __m1, __m2); }
|
---|
623 |
|
---|
624 | bool
|
---|
625 | compare_exchange_strong(__pointer_type& __p1, __pointer_type __p2,
|
---|
626 | memory_order __m = memory_order_seq_cst) noexcept
|
---|
627 | {
|
---|
628 | return _M_b.compare_exchange_strong(__p1, __p2, __m,
|
---|
629 | __cmpexch_failure_order(__m));
|
---|
630 | }
|
---|
631 |
|
---|
632 | bool
|
---|
633 | compare_exchange_strong(__pointer_type& __p1, __pointer_type __p2,
|
---|
634 | memory_order __m = memory_order_seq_cst) volatile noexcept
|
---|
635 | {
|
---|
636 | return _M_b.compare_exchange_strong(__p1, __p2, __m,
|
---|
637 | __cmpexch_failure_order(__m));
|
---|
638 | }
|
---|
639 |
|
---|
640 | #if __cpp_lib_atomic_wait
|
---|
641 | void
|
---|
642 | wait(__pointer_type __old, memory_order __m = memory_order_seq_cst) noexcept
|
---|
643 | { _M_b.wait(__old, __m); }
|
---|
644 |
|
---|
645 | // TODO add const volatile overload
|
---|
646 |
|
---|
647 | void
|
---|
648 | notify_one() const noexcept
|
---|
649 | { _M_b.notify_one(); }
|
---|
650 |
|
---|
651 | void
|
---|
652 | notify_all() const noexcept
|
---|
653 | { _M_b.notify_all(); }
|
---|
654 | #endif // __cpp_lib_atomic_wait
|
---|
655 | __pointer_type
|
---|
656 | fetch_add(ptrdiff_t __d,
|
---|
657 | memory_order __m = memory_order_seq_cst) noexcept
|
---|
658 | {
|
---|
659 | #if __cplusplus >= 201703L
|
---|
660 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
661 | #endif
|
---|
662 | return _M_b.fetch_add(__d, __m);
|
---|
663 | }
|
---|
664 |
|
---|
665 | __pointer_type
|
---|
666 | fetch_add(ptrdiff_t __d,
|
---|
667 | memory_order __m = memory_order_seq_cst) volatile noexcept
|
---|
668 | {
|
---|
669 | #if __cplusplus >= 201703L
|
---|
670 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
671 | #endif
|
---|
672 | return _M_b.fetch_add(__d, __m);
|
---|
673 | }
|
---|
674 |
|
---|
675 | __pointer_type
|
---|
676 | fetch_sub(ptrdiff_t __d,
|
---|
677 | memory_order __m = memory_order_seq_cst) noexcept
|
---|
678 | {
|
---|
679 | #if __cplusplus >= 201703L
|
---|
680 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
681 | #endif
|
---|
682 | return _M_b.fetch_sub(__d, __m);
|
---|
683 | }
|
---|
684 |
|
---|
685 | __pointer_type
|
---|
686 | fetch_sub(ptrdiff_t __d,
|
---|
687 | memory_order __m = memory_order_seq_cst) volatile noexcept
|
---|
688 | {
|
---|
689 | #if __cplusplus >= 201703L
|
---|
690 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
691 | #endif
|
---|
692 | return _M_b.fetch_sub(__d, __m);
|
---|
693 | }
|
---|
694 | };
|
---|
695 |
|
---|
696 |
|
---|
697 | /// Explicit specialization for char.
|
---|
698 | template<>
|
---|
699 | struct atomic<char> : __atomic_base<char>
|
---|
700 | {
|
---|
701 | typedef char __integral_type;
|
---|
702 | typedef __atomic_base<char> __base_type;
|
---|
703 |
|
---|
704 | atomic() noexcept = default;
|
---|
705 | ~atomic() noexcept = default;
|
---|
706 | atomic(const atomic&) = delete;
|
---|
707 | atomic& operator=(const atomic&) = delete;
|
---|
708 | atomic& operator=(const atomic&) volatile = delete;
|
---|
709 |
|
---|
710 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
711 |
|
---|
712 | using __base_type::operator __integral_type;
|
---|
713 | using __base_type::operator=;
|
---|
714 |
|
---|
715 | #if __cplusplus >= 201703L
|
---|
716 | static constexpr bool is_always_lock_free = ATOMIC_CHAR_LOCK_FREE == 2;
|
---|
717 | #endif
|
---|
718 | };
|
---|
719 |
|
---|
720 | /// Explicit specialization for signed char.
|
---|
721 | template<>
|
---|
722 | struct atomic<signed char> : __atomic_base<signed char>
|
---|
723 | {
|
---|
724 | typedef signed char __integral_type;
|
---|
725 | typedef __atomic_base<signed char> __base_type;
|
---|
726 |
|
---|
727 | atomic() noexcept= default;
|
---|
728 | ~atomic() noexcept = default;
|
---|
729 | atomic(const atomic&) = delete;
|
---|
730 | atomic& operator=(const atomic&) = delete;
|
---|
731 | atomic& operator=(const atomic&) volatile = delete;
|
---|
732 |
|
---|
733 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
734 |
|
---|
735 | using __base_type::operator __integral_type;
|
---|
736 | using __base_type::operator=;
|
---|
737 |
|
---|
738 | #if __cplusplus >= 201703L
|
---|
739 | static constexpr bool is_always_lock_free = ATOMIC_CHAR_LOCK_FREE == 2;
|
---|
740 | #endif
|
---|
741 | };
|
---|
742 |
|
---|
743 | /// Explicit specialization for unsigned char.
|
---|
744 | template<>
|
---|
745 | struct atomic<unsigned char> : __atomic_base<unsigned char>
|
---|
746 | {
|
---|
747 | typedef unsigned char __integral_type;
|
---|
748 | typedef __atomic_base<unsigned char> __base_type;
|
---|
749 |
|
---|
750 | atomic() noexcept= default;
|
---|
751 | ~atomic() noexcept = default;
|
---|
752 | atomic(const atomic&) = delete;
|
---|
753 | atomic& operator=(const atomic&) = delete;
|
---|
754 | atomic& operator=(const atomic&) volatile = delete;
|
---|
755 |
|
---|
756 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
757 |
|
---|
758 | using __base_type::operator __integral_type;
|
---|
759 | using __base_type::operator=;
|
---|
760 |
|
---|
761 | #if __cplusplus >= 201703L
|
---|
762 | static constexpr bool is_always_lock_free = ATOMIC_CHAR_LOCK_FREE == 2;
|
---|
763 | #endif
|
---|
764 | };
|
---|
765 |
|
---|
766 | /// Explicit specialization for short.
|
---|
767 | template<>
|
---|
768 | struct atomic<short> : __atomic_base<short>
|
---|
769 | {
|
---|
770 | typedef short __integral_type;
|
---|
771 | typedef __atomic_base<short> __base_type;
|
---|
772 |
|
---|
773 | atomic() noexcept = default;
|
---|
774 | ~atomic() noexcept = default;
|
---|
775 | atomic(const atomic&) = delete;
|
---|
776 | atomic& operator=(const atomic&) = delete;
|
---|
777 | atomic& operator=(const atomic&) volatile = delete;
|
---|
778 |
|
---|
779 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
780 |
|
---|
781 | using __base_type::operator __integral_type;
|
---|
782 | using __base_type::operator=;
|
---|
783 |
|
---|
784 | #if __cplusplus >= 201703L
|
---|
785 | static constexpr bool is_always_lock_free = ATOMIC_SHORT_LOCK_FREE == 2;
|
---|
786 | #endif
|
---|
787 | };
|
---|
788 |
|
---|
789 | /// Explicit specialization for unsigned short.
|
---|
790 | template<>
|
---|
791 | struct atomic<unsigned short> : __atomic_base<unsigned short>
|
---|
792 | {
|
---|
793 | typedef unsigned short __integral_type;
|
---|
794 | typedef __atomic_base<unsigned short> __base_type;
|
---|
795 |
|
---|
796 | atomic() noexcept = default;
|
---|
797 | ~atomic() noexcept = default;
|
---|
798 | atomic(const atomic&) = delete;
|
---|
799 | atomic& operator=(const atomic&) = delete;
|
---|
800 | atomic& operator=(const atomic&) volatile = delete;
|
---|
801 |
|
---|
802 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
803 |
|
---|
804 | using __base_type::operator __integral_type;
|
---|
805 | using __base_type::operator=;
|
---|
806 |
|
---|
807 | #if __cplusplus >= 201703L
|
---|
808 | static constexpr bool is_always_lock_free = ATOMIC_SHORT_LOCK_FREE == 2;
|
---|
809 | #endif
|
---|
810 | };
|
---|
811 |
|
---|
812 | /// Explicit specialization for int.
|
---|
813 | template<>
|
---|
814 | struct atomic<int> : __atomic_base<int>
|
---|
815 | {
|
---|
816 | typedef int __integral_type;
|
---|
817 | typedef __atomic_base<int> __base_type;
|
---|
818 |
|
---|
819 | atomic() noexcept = default;
|
---|
820 | ~atomic() noexcept = default;
|
---|
821 | atomic(const atomic&) = delete;
|
---|
822 | atomic& operator=(const atomic&) = delete;
|
---|
823 | atomic& operator=(const atomic&) volatile = delete;
|
---|
824 |
|
---|
825 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
826 |
|
---|
827 | using __base_type::operator __integral_type;
|
---|
828 | using __base_type::operator=;
|
---|
829 |
|
---|
830 | #if __cplusplus >= 201703L
|
---|
831 | static constexpr bool is_always_lock_free = ATOMIC_INT_LOCK_FREE == 2;
|
---|
832 | #endif
|
---|
833 | };
|
---|
834 |
|
---|
835 | /// Explicit specialization for unsigned int.
|
---|
836 | template<>
|
---|
837 | struct atomic<unsigned int> : __atomic_base<unsigned int>
|
---|
838 | {
|
---|
839 | typedef unsigned int __integral_type;
|
---|
840 | typedef __atomic_base<unsigned int> __base_type;
|
---|
841 |
|
---|
842 | atomic() noexcept = default;
|
---|
843 | ~atomic() noexcept = default;
|
---|
844 | atomic(const atomic&) = delete;
|
---|
845 | atomic& operator=(const atomic&) = delete;
|
---|
846 | atomic& operator=(const atomic&) volatile = delete;
|
---|
847 |
|
---|
848 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
849 |
|
---|
850 | using __base_type::operator __integral_type;
|
---|
851 | using __base_type::operator=;
|
---|
852 |
|
---|
853 | #if __cplusplus >= 201703L
|
---|
854 | static constexpr bool is_always_lock_free = ATOMIC_INT_LOCK_FREE == 2;
|
---|
855 | #endif
|
---|
856 | };
|
---|
857 |
|
---|
858 | /// Explicit specialization for long.
|
---|
859 | template<>
|
---|
860 | struct atomic<long> : __atomic_base<long>
|
---|
861 | {
|
---|
862 | typedef long __integral_type;
|
---|
863 | typedef __atomic_base<long> __base_type;
|
---|
864 |
|
---|
865 | atomic() noexcept = default;
|
---|
866 | ~atomic() noexcept = default;
|
---|
867 | atomic(const atomic&) = delete;
|
---|
868 | atomic& operator=(const atomic&) = delete;
|
---|
869 | atomic& operator=(const atomic&) volatile = delete;
|
---|
870 |
|
---|
871 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
872 |
|
---|
873 | using __base_type::operator __integral_type;
|
---|
874 | using __base_type::operator=;
|
---|
875 |
|
---|
876 | #if __cplusplus >= 201703L
|
---|
877 | static constexpr bool is_always_lock_free = ATOMIC_LONG_LOCK_FREE == 2;
|
---|
878 | #endif
|
---|
879 | };
|
---|
880 |
|
---|
881 | /// Explicit specialization for unsigned long.
|
---|
882 | template<>
|
---|
883 | struct atomic<unsigned long> : __atomic_base<unsigned long>
|
---|
884 | {
|
---|
885 | typedef unsigned long __integral_type;
|
---|
886 | typedef __atomic_base<unsigned long> __base_type;
|
---|
887 |
|
---|
888 | atomic() noexcept = default;
|
---|
889 | ~atomic() noexcept = default;
|
---|
890 | atomic(const atomic&) = delete;
|
---|
891 | atomic& operator=(const atomic&) = delete;
|
---|
892 | atomic& operator=(const atomic&) volatile = delete;
|
---|
893 |
|
---|
894 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
895 |
|
---|
896 | using __base_type::operator __integral_type;
|
---|
897 | using __base_type::operator=;
|
---|
898 |
|
---|
899 | #if __cplusplus >= 201703L
|
---|
900 | static constexpr bool is_always_lock_free = ATOMIC_LONG_LOCK_FREE == 2;
|
---|
901 | #endif
|
---|
902 | };
|
---|
903 |
|
---|
904 | /// Explicit specialization for long long.
|
---|
905 | template<>
|
---|
906 | struct atomic<long long> : __atomic_base<long long>
|
---|
907 | {
|
---|
908 | typedef long long __integral_type;
|
---|
909 | typedef __atomic_base<long long> __base_type;
|
---|
910 |
|
---|
911 | atomic() noexcept = default;
|
---|
912 | ~atomic() noexcept = default;
|
---|
913 | atomic(const atomic&) = delete;
|
---|
914 | atomic& operator=(const atomic&) = delete;
|
---|
915 | atomic& operator=(const atomic&) volatile = delete;
|
---|
916 |
|
---|
917 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
918 |
|
---|
919 | using __base_type::operator __integral_type;
|
---|
920 | using __base_type::operator=;
|
---|
921 |
|
---|
922 | #if __cplusplus >= 201703L
|
---|
923 | static constexpr bool is_always_lock_free = ATOMIC_LLONG_LOCK_FREE == 2;
|
---|
924 | #endif
|
---|
925 | };
|
---|
926 |
|
---|
927 | /// Explicit specialization for unsigned long long.
|
---|
928 | template<>
|
---|
929 | struct atomic<unsigned long long> : __atomic_base<unsigned long long>
|
---|
930 | {
|
---|
931 | typedef unsigned long long __integral_type;
|
---|
932 | typedef __atomic_base<unsigned long long> __base_type;
|
---|
933 |
|
---|
934 | atomic() noexcept = default;
|
---|
935 | ~atomic() noexcept = default;
|
---|
936 | atomic(const atomic&) = delete;
|
---|
937 | atomic& operator=(const atomic&) = delete;
|
---|
938 | atomic& operator=(const atomic&) volatile = delete;
|
---|
939 |
|
---|
940 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
941 |
|
---|
942 | using __base_type::operator __integral_type;
|
---|
943 | using __base_type::operator=;
|
---|
944 |
|
---|
945 | #if __cplusplus >= 201703L
|
---|
946 | static constexpr bool is_always_lock_free = ATOMIC_LLONG_LOCK_FREE == 2;
|
---|
947 | #endif
|
---|
948 | };
|
---|
949 |
|
---|
950 | /// Explicit specialization for wchar_t.
|
---|
951 | template<>
|
---|
952 | struct atomic<wchar_t> : __atomic_base<wchar_t>
|
---|
953 | {
|
---|
954 | typedef wchar_t __integral_type;
|
---|
955 | typedef __atomic_base<wchar_t> __base_type;
|
---|
956 |
|
---|
957 | atomic() noexcept = default;
|
---|
958 | ~atomic() noexcept = default;
|
---|
959 | atomic(const atomic&) = delete;
|
---|
960 | atomic& operator=(const atomic&) = delete;
|
---|
961 | atomic& operator=(const atomic&) volatile = delete;
|
---|
962 |
|
---|
963 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
964 |
|
---|
965 | using __base_type::operator __integral_type;
|
---|
966 | using __base_type::operator=;
|
---|
967 |
|
---|
968 | #if __cplusplus >= 201703L
|
---|
969 | static constexpr bool is_always_lock_free = ATOMIC_WCHAR_T_LOCK_FREE == 2;
|
---|
970 | #endif
|
---|
971 | };
|
---|
972 |
|
---|
973 | #ifdef _GLIBCXX_USE_CHAR8_T
|
---|
974 | /// Explicit specialization for char8_t.
|
---|
975 | template<>
|
---|
976 | struct atomic<char8_t> : __atomic_base<char8_t>
|
---|
977 | {
|
---|
978 | typedef char8_t __integral_type;
|
---|
979 | typedef __atomic_base<char8_t> __base_type;
|
---|
980 |
|
---|
981 | atomic() noexcept = default;
|
---|
982 | ~atomic() noexcept = default;
|
---|
983 | atomic(const atomic&) = delete;
|
---|
984 | atomic& operator=(const atomic&) = delete;
|
---|
985 | atomic& operator=(const atomic&) volatile = delete;
|
---|
986 |
|
---|
987 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
988 |
|
---|
989 | using __base_type::operator __integral_type;
|
---|
990 | using __base_type::operator=;
|
---|
991 |
|
---|
992 | #if __cplusplus > 201402L
|
---|
993 | static constexpr bool is_always_lock_free = ATOMIC_CHAR8_T_LOCK_FREE == 2;
|
---|
994 | #endif
|
---|
995 | };
|
---|
996 | #endif
|
---|
997 |
|
---|
998 | /// Explicit specialization for char16_t.
|
---|
999 | template<>
|
---|
1000 | struct atomic<char16_t> : __atomic_base<char16_t>
|
---|
1001 | {
|
---|
1002 | typedef char16_t __integral_type;
|
---|
1003 | typedef __atomic_base<char16_t> __base_type;
|
---|
1004 |
|
---|
1005 | atomic() noexcept = default;
|
---|
1006 | ~atomic() noexcept = default;
|
---|
1007 | atomic(const atomic&) = delete;
|
---|
1008 | atomic& operator=(const atomic&) = delete;
|
---|
1009 | atomic& operator=(const atomic&) volatile = delete;
|
---|
1010 |
|
---|
1011 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
1012 |
|
---|
1013 | using __base_type::operator __integral_type;
|
---|
1014 | using __base_type::operator=;
|
---|
1015 |
|
---|
1016 | #if __cplusplus >= 201703L
|
---|
1017 | static constexpr bool is_always_lock_free = ATOMIC_CHAR16_T_LOCK_FREE == 2;
|
---|
1018 | #endif
|
---|
1019 | };
|
---|
1020 |
|
---|
1021 | /// Explicit specialization for char32_t.
|
---|
1022 | template<>
|
---|
1023 | struct atomic<char32_t> : __atomic_base<char32_t>
|
---|
1024 | {
|
---|
1025 | typedef char32_t __integral_type;
|
---|
1026 | typedef __atomic_base<char32_t> __base_type;
|
---|
1027 |
|
---|
1028 | atomic() noexcept = default;
|
---|
1029 | ~atomic() noexcept = default;
|
---|
1030 | atomic(const atomic&) = delete;
|
---|
1031 | atomic& operator=(const atomic&) = delete;
|
---|
1032 | atomic& operator=(const atomic&) volatile = delete;
|
---|
1033 |
|
---|
1034 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
1035 |
|
---|
1036 | using __base_type::operator __integral_type;
|
---|
1037 | using __base_type::operator=;
|
---|
1038 |
|
---|
1039 | #if __cplusplus >= 201703L
|
---|
1040 | static constexpr bool is_always_lock_free = ATOMIC_CHAR32_T_LOCK_FREE == 2;
|
---|
1041 | #endif
|
---|
1042 | };
|
---|
1043 |
|
---|
1044 |
|
---|
1045 | /// atomic_bool
|
---|
1046 | typedef atomic<bool> atomic_bool;
|
---|
1047 |
|
---|
1048 | /// atomic_char
|
---|
1049 | typedef atomic<char> atomic_char;
|
---|
1050 |
|
---|
1051 | /// atomic_schar
|
---|
1052 | typedef atomic<signed char> atomic_schar;
|
---|
1053 |
|
---|
1054 | /// atomic_uchar
|
---|
1055 | typedef atomic<unsigned char> atomic_uchar;
|
---|
1056 |
|
---|
1057 | /// atomic_short
|
---|
1058 | typedef atomic<short> atomic_short;
|
---|
1059 |
|
---|
1060 | /// atomic_ushort
|
---|
1061 | typedef atomic<unsigned short> atomic_ushort;
|
---|
1062 |
|
---|
1063 | /// atomic_int
|
---|
1064 | typedef atomic<int> atomic_int;
|
---|
1065 |
|
---|
1066 | /// atomic_uint
|
---|
1067 | typedef atomic<unsigned int> atomic_uint;
|
---|
1068 |
|
---|
1069 | /// atomic_long
|
---|
1070 | typedef atomic<long> atomic_long;
|
---|
1071 |
|
---|
1072 | /// atomic_ulong
|
---|
1073 | typedef atomic<unsigned long> atomic_ulong;
|
---|
1074 |
|
---|
1075 | /// atomic_llong
|
---|
1076 | typedef atomic<long long> atomic_llong;
|
---|
1077 |
|
---|
1078 | /// atomic_ullong
|
---|
1079 | typedef atomic<unsigned long long> atomic_ullong;
|
---|
1080 |
|
---|
1081 | /// atomic_wchar_t
|
---|
1082 | typedef atomic<wchar_t> atomic_wchar_t;
|
---|
1083 |
|
---|
1084 | #ifdef _GLIBCXX_USE_CHAR8_T
|
---|
1085 | /// atomic_char8_t
|
---|
1086 | typedef atomic<char8_t> atomic_char8_t;
|
---|
1087 | #endif
|
---|
1088 |
|
---|
1089 | /// atomic_char16_t
|
---|
1090 | typedef atomic<char16_t> atomic_char16_t;
|
---|
1091 |
|
---|
1092 | /// atomic_char32_t
|
---|
1093 | typedef atomic<char32_t> atomic_char32_t;
|
---|
1094 |
|
---|
1095 | #ifdef _GLIBCXX_USE_C99_STDINT_TR1
|
---|
1096 | // _GLIBCXX_RESOLVE_LIB_DEFECTS
|
---|
1097 | // 2441. Exact-width atomic typedefs should be provided
|
---|
1098 |
|
---|
1099 | /// atomic_int8_t
|
---|
1100 | typedef atomic<int8_t> atomic_int8_t;
|
---|
1101 |
|
---|
1102 | /// atomic_uint8_t
|
---|
1103 | typedef atomic<uint8_t> atomic_uint8_t;
|
---|
1104 |
|
---|
1105 | /// atomic_int16_t
|
---|
1106 | typedef atomic<int16_t> atomic_int16_t;
|
---|
1107 |
|
---|
1108 | /// atomic_uint16_t
|
---|
1109 | typedef atomic<uint16_t> atomic_uint16_t;
|
---|
1110 |
|
---|
1111 | /// atomic_int32_t
|
---|
1112 | typedef atomic<int32_t> atomic_int32_t;
|
---|
1113 |
|
---|
1114 | /// atomic_uint32_t
|
---|
1115 | typedef atomic<uint32_t> atomic_uint32_t;
|
---|
1116 |
|
---|
1117 | /// atomic_int64_t
|
---|
1118 | typedef atomic<int64_t> atomic_int64_t;
|
---|
1119 |
|
---|
1120 | /// atomic_uint64_t
|
---|
1121 | typedef atomic<uint64_t> atomic_uint64_t;
|
---|
1122 |
|
---|
1123 |
|
---|
1124 | /// atomic_int_least8_t
|
---|
1125 | typedef atomic<int_least8_t> atomic_int_least8_t;
|
---|
1126 |
|
---|
1127 | /// atomic_uint_least8_t
|
---|
1128 | typedef atomic<uint_least8_t> atomic_uint_least8_t;
|
---|
1129 |
|
---|
1130 | /// atomic_int_least16_t
|
---|
1131 | typedef atomic<int_least16_t> atomic_int_least16_t;
|
---|
1132 |
|
---|
1133 | /// atomic_uint_least16_t
|
---|
1134 | typedef atomic<uint_least16_t> atomic_uint_least16_t;
|
---|
1135 |
|
---|
1136 | /// atomic_int_least32_t
|
---|
1137 | typedef atomic<int_least32_t> atomic_int_least32_t;
|
---|
1138 |
|
---|
1139 | /// atomic_uint_least32_t
|
---|
1140 | typedef atomic<uint_least32_t> atomic_uint_least32_t;
|
---|
1141 |
|
---|
1142 | /// atomic_int_least64_t
|
---|
1143 | typedef atomic<int_least64_t> atomic_int_least64_t;
|
---|
1144 |
|
---|
1145 | /// atomic_uint_least64_t
|
---|
1146 | typedef atomic<uint_least64_t> atomic_uint_least64_t;
|
---|
1147 |
|
---|
1148 |
|
---|
1149 | /// atomic_int_fast8_t
|
---|
1150 | typedef atomic<int_fast8_t> atomic_int_fast8_t;
|
---|
1151 |
|
---|
1152 | /// atomic_uint_fast8_t
|
---|
1153 | typedef atomic<uint_fast8_t> atomic_uint_fast8_t;
|
---|
1154 |
|
---|
1155 | /// atomic_int_fast16_t
|
---|
1156 | typedef atomic<int_fast16_t> atomic_int_fast16_t;
|
---|
1157 |
|
---|
1158 | /// atomic_uint_fast16_t
|
---|
1159 | typedef atomic<uint_fast16_t> atomic_uint_fast16_t;
|
---|
1160 |
|
---|
1161 | /// atomic_int_fast32_t
|
---|
1162 | typedef atomic<int_fast32_t> atomic_int_fast32_t;
|
---|
1163 |
|
---|
1164 | /// atomic_uint_fast32_t
|
---|
1165 | typedef atomic<uint_fast32_t> atomic_uint_fast32_t;
|
---|
1166 |
|
---|
1167 | /// atomic_int_fast64_t
|
---|
1168 | typedef atomic<int_fast64_t> atomic_int_fast64_t;
|
---|
1169 |
|
---|
1170 | /// atomic_uint_fast64_t
|
---|
1171 | typedef atomic<uint_fast64_t> atomic_uint_fast64_t;
|
---|
1172 | #endif
|
---|
1173 |
|
---|
1174 |
|
---|
1175 | /// atomic_intptr_t
|
---|
1176 | typedef atomic<intptr_t> atomic_intptr_t;
|
---|
1177 |
|
---|
1178 | /// atomic_uintptr_t
|
---|
1179 | typedef atomic<uintptr_t> atomic_uintptr_t;
|
---|
1180 |
|
---|
1181 | /// atomic_size_t
|
---|
1182 | typedef atomic<size_t> atomic_size_t;
|
---|
1183 |
|
---|
1184 | /// atomic_ptrdiff_t
|
---|
1185 | typedef atomic<ptrdiff_t> atomic_ptrdiff_t;
|
---|
1186 |
|
---|
1187 | #ifdef _GLIBCXX_USE_C99_STDINT_TR1
|
---|
1188 | /// atomic_intmax_t
|
---|
1189 | typedef atomic<intmax_t> atomic_intmax_t;
|
---|
1190 |
|
---|
1191 | /// atomic_uintmax_t
|
---|
1192 | typedef atomic<uintmax_t> atomic_uintmax_t;
|
---|
1193 | #endif
|
---|
1194 |
|
---|
1195 | // Function definitions, atomic_flag operations.
|
---|
1196 | inline bool
|
---|
1197 | atomic_flag_test_and_set_explicit(atomic_flag* __a,
|
---|
1198 | memory_order __m) noexcept
|
---|
1199 | { return __a->test_and_set(__m); }
|
---|
1200 |
|
---|
1201 | inline bool
|
---|
1202 | atomic_flag_test_and_set_explicit(volatile atomic_flag* __a,
|
---|
1203 | memory_order __m) noexcept
|
---|
1204 | { return __a->test_and_set(__m); }
|
---|
1205 |
|
---|
1206 | inline void
|
---|
1207 | atomic_flag_clear_explicit(atomic_flag* __a, memory_order __m) noexcept
|
---|
1208 | { __a->clear(__m); }
|
---|
1209 |
|
---|
1210 | inline void
|
---|
1211 | atomic_flag_clear_explicit(volatile atomic_flag* __a,
|
---|
1212 | memory_order __m) noexcept
|
---|
1213 | { __a->clear(__m); }
|
---|
1214 |
|
---|
1215 | inline bool
|
---|
1216 | atomic_flag_test_and_set(atomic_flag* __a) noexcept
|
---|
1217 | { return atomic_flag_test_and_set_explicit(__a, memory_order_seq_cst); }
|
---|
1218 |
|
---|
1219 | inline bool
|
---|
1220 | atomic_flag_test_and_set(volatile atomic_flag* __a) noexcept
|
---|
1221 | { return atomic_flag_test_and_set_explicit(__a, memory_order_seq_cst); }
|
---|
1222 |
|
---|
1223 | inline void
|
---|
1224 | atomic_flag_clear(atomic_flag* __a) noexcept
|
---|
1225 | { atomic_flag_clear_explicit(__a, memory_order_seq_cst); }
|
---|
1226 |
|
---|
1227 | inline void
|
---|
1228 | atomic_flag_clear(volatile atomic_flag* __a) noexcept
|
---|
1229 | { atomic_flag_clear_explicit(__a, memory_order_seq_cst); }
|
---|
1230 |
|
---|
1231 |
|
---|
1232 | template<typename _Tp>
|
---|
1233 | using __atomic_val_t = typename atomic<_Tp>::value_type;
|
---|
1234 | template<typename _Tp>
|
---|
1235 | using __atomic_diff_t = typename atomic<_Tp>::difference_type;
|
---|
1236 |
|
---|
1237 | // [atomics.nonmembers] Non-member functions.
|
---|
1238 | // Function templates generally applicable to atomic types.
|
---|
1239 | template<typename _ITp>
|
---|
1240 | inline bool
|
---|
1241 | atomic_is_lock_free(const atomic<_ITp>* __a) noexcept
|
---|
1242 | { return __a->is_lock_free(); }
|
---|
1243 |
|
---|
1244 | template<typename _ITp>
|
---|
1245 | inline bool
|
---|
1246 | atomic_is_lock_free(const volatile atomic<_ITp>* __a) noexcept
|
---|
1247 | { return __a->is_lock_free(); }
|
---|
1248 |
|
---|
1249 | template<typename _ITp>
|
---|
1250 | inline void
|
---|
1251 | atomic_init(atomic<_ITp>* __a, __atomic_val_t<_ITp> __i) noexcept
|
---|
1252 | { __a->store(__i, memory_order_relaxed); }
|
---|
1253 |
|
---|
1254 | template<typename _ITp>
|
---|
1255 | inline void
|
---|
1256 | atomic_init(volatile atomic<_ITp>* __a, __atomic_val_t<_ITp> __i) noexcept
|
---|
1257 | { __a->store(__i, memory_order_relaxed); }
|
---|
1258 |
|
---|
1259 | template<typename _ITp>
|
---|
1260 | inline void
|
---|
1261 | atomic_store_explicit(atomic<_ITp>* __a, __atomic_val_t<_ITp> __i,
|
---|
1262 | memory_order __m) noexcept
|
---|
1263 | { __a->store(__i, __m); }
|
---|
1264 |
|
---|
1265 | template<typename _ITp>
|
---|
1266 | inline void
|
---|
1267 | atomic_store_explicit(volatile atomic<_ITp>* __a, __atomic_val_t<_ITp> __i,
|
---|
1268 | memory_order __m) noexcept
|
---|
1269 | { __a->store(__i, __m); }
|
---|
1270 |
|
---|
1271 | template<typename _ITp>
|
---|
1272 | inline _ITp
|
---|
1273 | atomic_load_explicit(const atomic<_ITp>* __a, memory_order __m) noexcept
|
---|
1274 | { return __a->load(__m); }
|
---|
1275 |
|
---|
1276 | template<typename _ITp>
|
---|
1277 | inline _ITp
|
---|
1278 | atomic_load_explicit(const volatile atomic<_ITp>* __a,
|
---|
1279 | memory_order __m) noexcept
|
---|
1280 | { return __a->load(__m); }
|
---|
1281 |
|
---|
1282 | template<typename _ITp>
|
---|
1283 | inline _ITp
|
---|
1284 | atomic_exchange_explicit(atomic<_ITp>* __a, __atomic_val_t<_ITp> __i,
|
---|
1285 | memory_order __m) noexcept
|
---|
1286 | { return __a->exchange(__i, __m); }
|
---|
1287 |
|
---|
1288 | template<typename _ITp>
|
---|
1289 | inline _ITp
|
---|
1290 | atomic_exchange_explicit(volatile atomic<_ITp>* __a,
|
---|
1291 | __atomic_val_t<_ITp> __i,
|
---|
1292 | memory_order __m) noexcept
|
---|
1293 | { return __a->exchange(__i, __m); }
|
---|
1294 |
|
---|
1295 | template<typename _ITp>
|
---|
1296 | inline bool
|
---|
1297 | atomic_compare_exchange_weak_explicit(atomic<_ITp>* __a,
|
---|
1298 | __atomic_val_t<_ITp>* __i1,
|
---|
1299 | __atomic_val_t<_ITp> __i2,
|
---|
1300 | memory_order __m1,
|
---|
1301 | memory_order __m2) noexcept
|
---|
1302 | { return __a->compare_exchange_weak(*__i1, __i2, __m1, __m2); }
|
---|
1303 |
|
---|
1304 | template<typename _ITp>
|
---|
1305 | inline bool
|
---|
1306 | atomic_compare_exchange_weak_explicit(volatile atomic<_ITp>* __a,
|
---|
1307 | __atomic_val_t<_ITp>* __i1,
|
---|
1308 | __atomic_val_t<_ITp> __i2,
|
---|
1309 | memory_order __m1,
|
---|
1310 | memory_order __m2) noexcept
|
---|
1311 | { return __a->compare_exchange_weak(*__i1, __i2, __m1, __m2); }
|
---|
1312 |
|
---|
1313 | template<typename _ITp>
|
---|
1314 | inline bool
|
---|
1315 | atomic_compare_exchange_strong_explicit(atomic<_ITp>* __a,
|
---|
1316 | __atomic_val_t<_ITp>* __i1,
|
---|
1317 | __atomic_val_t<_ITp> __i2,
|
---|
1318 | memory_order __m1,
|
---|
1319 | memory_order __m2) noexcept
|
---|
1320 | { return __a->compare_exchange_strong(*__i1, __i2, __m1, __m2); }
|
---|
1321 |
|
---|
1322 | template<typename _ITp>
|
---|
1323 | inline bool
|
---|
1324 | atomic_compare_exchange_strong_explicit(volatile atomic<_ITp>* __a,
|
---|
1325 | __atomic_val_t<_ITp>* __i1,
|
---|
1326 | __atomic_val_t<_ITp> __i2,
|
---|
1327 | memory_order __m1,
|
---|
1328 | memory_order __m2) noexcept
|
---|
1329 | { return __a->compare_exchange_strong(*__i1, __i2, __m1, __m2); }
|
---|
1330 |
|
---|
1331 |
|
---|
1332 | template<typename _ITp>
|
---|
1333 | inline void
|
---|
1334 | atomic_store(atomic<_ITp>* __a, __atomic_val_t<_ITp> __i) noexcept
|
---|
1335 | { atomic_store_explicit(__a, __i, memory_order_seq_cst); }
|
---|
1336 |
|
---|
1337 | template<typename _ITp>
|
---|
1338 | inline void
|
---|
1339 | atomic_store(volatile atomic<_ITp>* __a, __atomic_val_t<_ITp> __i) noexcept
|
---|
1340 | { atomic_store_explicit(__a, __i, memory_order_seq_cst); }
|
---|
1341 |
|
---|
1342 | template<typename _ITp>
|
---|
1343 | inline _ITp
|
---|
1344 | atomic_load(const atomic<_ITp>* __a) noexcept
|
---|
1345 | { return atomic_load_explicit(__a, memory_order_seq_cst); }
|
---|
1346 |
|
---|
1347 | template<typename _ITp>
|
---|
1348 | inline _ITp
|
---|
1349 | atomic_load(const volatile atomic<_ITp>* __a) noexcept
|
---|
1350 | { return atomic_load_explicit(__a, memory_order_seq_cst); }
|
---|
1351 |
|
---|
1352 | template<typename _ITp>
|
---|
1353 | inline _ITp
|
---|
1354 | atomic_exchange(atomic<_ITp>* __a, __atomic_val_t<_ITp> __i) noexcept
|
---|
1355 | { return atomic_exchange_explicit(__a, __i, memory_order_seq_cst); }
|
---|
1356 |
|
---|
1357 | template<typename _ITp>
|
---|
1358 | inline _ITp
|
---|
1359 | atomic_exchange(volatile atomic<_ITp>* __a,
|
---|
1360 | __atomic_val_t<_ITp> __i) noexcept
|
---|
1361 | { return atomic_exchange_explicit(__a, __i, memory_order_seq_cst); }
|
---|
1362 |
|
---|
1363 | template<typename _ITp>
|
---|
1364 | inline bool
|
---|
1365 | atomic_compare_exchange_weak(atomic<_ITp>* __a,
|
---|
1366 | __atomic_val_t<_ITp>* __i1,
|
---|
1367 | __atomic_val_t<_ITp> __i2) noexcept
|
---|
1368 | {
|
---|
1369 | return atomic_compare_exchange_weak_explicit(__a, __i1, __i2,
|
---|
1370 | memory_order_seq_cst,
|
---|
1371 | memory_order_seq_cst);
|
---|
1372 | }
|
---|
1373 |
|
---|
1374 | template<typename _ITp>
|
---|
1375 | inline bool
|
---|
1376 | atomic_compare_exchange_weak(volatile atomic<_ITp>* __a,
|
---|
1377 | __atomic_val_t<_ITp>* __i1,
|
---|
1378 | __atomic_val_t<_ITp> __i2) noexcept
|
---|
1379 | {
|
---|
1380 | return atomic_compare_exchange_weak_explicit(__a, __i1, __i2,
|
---|
1381 | memory_order_seq_cst,
|
---|
1382 | memory_order_seq_cst);
|
---|
1383 | }
|
---|
1384 |
|
---|
1385 | template<typename _ITp>
|
---|
1386 | inline bool
|
---|
1387 | atomic_compare_exchange_strong(atomic<_ITp>* __a,
|
---|
1388 | __atomic_val_t<_ITp>* __i1,
|
---|
1389 | __atomic_val_t<_ITp> __i2) noexcept
|
---|
1390 | {
|
---|
1391 | return atomic_compare_exchange_strong_explicit(__a, __i1, __i2,
|
---|
1392 | memory_order_seq_cst,
|
---|
1393 | memory_order_seq_cst);
|
---|
1394 | }
|
---|
1395 |
|
---|
1396 | template<typename _ITp>
|
---|
1397 | inline bool
|
---|
1398 | atomic_compare_exchange_strong(volatile atomic<_ITp>* __a,
|
---|
1399 | __atomic_val_t<_ITp>* __i1,
|
---|
1400 | __atomic_val_t<_ITp> __i2) noexcept
|
---|
1401 | {
|
---|
1402 | return atomic_compare_exchange_strong_explicit(__a, __i1, __i2,
|
---|
1403 | memory_order_seq_cst,
|
---|
1404 | memory_order_seq_cst);
|
---|
1405 | }
|
---|
1406 |
|
---|
1407 |
|
---|
1408 | #if __cpp_lib_atomic_wait
|
---|
1409 | template<typename _Tp>
|
---|
1410 | inline void
|
---|
1411 | atomic_wait(const atomic<_Tp>* __a,
|
---|
1412 | typename std::atomic<_Tp>::value_type __old) noexcept
|
---|
1413 | { __a->wait(__old); }
|
---|
1414 |
|
---|
1415 | template<typename _Tp>
|
---|
1416 | inline void
|
---|
1417 | atomic_wait_explicit(const atomic<_Tp>* __a,
|
---|
1418 | typename std::atomic<_Tp>::value_type __old,
|
---|
1419 | std::memory_order __m) noexcept
|
---|
1420 | { __a->wait(__old, __m); }
|
---|
1421 |
|
---|
1422 | template<typename _Tp>
|
---|
1423 | inline void
|
---|
1424 | atomic_notify_one(atomic<_Tp>* __a) noexcept
|
---|
1425 | { __a->notify_one(); }
|
---|
1426 |
|
---|
1427 | template<typename _Tp>
|
---|
1428 | inline void
|
---|
1429 | atomic_notify_all(atomic<_Tp>* __a) noexcept
|
---|
1430 | { __a->notify_all(); }
|
---|
1431 | #endif // __cpp_lib_atomic_wait
|
---|
1432 |
|
---|
1433 | // Function templates for atomic_integral and atomic_pointer operations only.
|
---|
1434 | // Some operations (and, or, xor) are only available for atomic integrals,
|
---|
1435 | // which is implemented by taking a parameter of type __atomic_base<_ITp>*.
|
---|
1436 |
|
---|
1437 | template<typename _ITp>
|
---|
1438 | inline _ITp
|
---|
1439 | atomic_fetch_add_explicit(atomic<_ITp>* __a,
|
---|
1440 | __atomic_diff_t<_ITp> __i,
|
---|
1441 | memory_order __m) noexcept
|
---|
1442 | { return __a->fetch_add(__i, __m); }
|
---|
1443 |
|
---|
1444 | template<typename _ITp>
|
---|
1445 | inline _ITp
|
---|
1446 | atomic_fetch_add_explicit(volatile atomic<_ITp>* __a,
|
---|
1447 | __atomic_diff_t<_ITp> __i,
|
---|
1448 | memory_order __m) noexcept
|
---|
1449 | { return __a->fetch_add(__i, __m); }
|
---|
1450 |
|
---|
1451 | template<typename _ITp>
|
---|
1452 | inline _ITp
|
---|
1453 | atomic_fetch_sub_explicit(atomic<_ITp>* __a,
|
---|
1454 | __atomic_diff_t<_ITp> __i,
|
---|
1455 | memory_order __m) noexcept
|
---|
1456 | { return __a->fetch_sub(__i, __m); }
|
---|
1457 |
|
---|
1458 | template<typename _ITp>
|
---|
1459 | inline _ITp
|
---|
1460 | atomic_fetch_sub_explicit(volatile atomic<_ITp>* __a,
|
---|
1461 | __atomic_diff_t<_ITp> __i,
|
---|
1462 | memory_order __m) noexcept
|
---|
1463 | { return __a->fetch_sub(__i, __m); }
|
---|
1464 |
|
---|
1465 | template<typename _ITp>
|
---|
1466 | inline _ITp
|
---|
1467 | atomic_fetch_and_explicit(__atomic_base<_ITp>* __a,
|
---|
1468 | __atomic_val_t<_ITp> __i,
|
---|
1469 | memory_order __m) noexcept
|
---|
1470 | { return __a->fetch_and(__i, __m); }
|
---|
1471 |
|
---|
1472 | template<typename _ITp>
|
---|
1473 | inline _ITp
|
---|
1474 | atomic_fetch_and_explicit(volatile __atomic_base<_ITp>* __a,
|
---|
1475 | __atomic_val_t<_ITp> __i,
|
---|
1476 | memory_order __m) noexcept
|
---|
1477 | { return __a->fetch_and(__i, __m); }
|
---|
1478 |
|
---|
1479 | template<typename _ITp>
|
---|
1480 | inline _ITp
|
---|
1481 | atomic_fetch_or_explicit(__atomic_base<_ITp>* __a,
|
---|
1482 | __atomic_val_t<_ITp> __i,
|
---|
1483 | memory_order __m) noexcept
|
---|
1484 | { return __a->fetch_or(__i, __m); }
|
---|
1485 |
|
---|
1486 | template<typename _ITp>
|
---|
1487 | inline _ITp
|
---|
1488 | atomic_fetch_or_explicit(volatile __atomic_base<_ITp>* __a,
|
---|
1489 | __atomic_val_t<_ITp> __i,
|
---|
1490 | memory_order __m) noexcept
|
---|
1491 | { return __a->fetch_or(__i, __m); }
|
---|
1492 |
|
---|
1493 | template<typename _ITp>
|
---|
1494 | inline _ITp
|
---|
1495 | atomic_fetch_xor_explicit(__atomic_base<_ITp>* __a,
|
---|
1496 | __atomic_val_t<_ITp> __i,
|
---|
1497 | memory_order __m) noexcept
|
---|
1498 | { return __a->fetch_xor(__i, __m); }
|
---|
1499 |
|
---|
1500 | template<typename _ITp>
|
---|
1501 | inline _ITp
|
---|
1502 | atomic_fetch_xor_explicit(volatile __atomic_base<_ITp>* __a,
|
---|
1503 | __atomic_val_t<_ITp> __i,
|
---|
1504 | memory_order __m) noexcept
|
---|
1505 | { return __a->fetch_xor(__i, __m); }
|
---|
1506 |
|
---|
1507 | template<typename _ITp>
|
---|
1508 | inline _ITp
|
---|
1509 | atomic_fetch_add(atomic<_ITp>* __a,
|
---|
1510 | __atomic_diff_t<_ITp> __i) noexcept
|
---|
1511 | { return atomic_fetch_add_explicit(__a, __i, memory_order_seq_cst); }
|
---|
1512 |
|
---|
1513 | template<typename _ITp>
|
---|
1514 | inline _ITp
|
---|
1515 | atomic_fetch_add(volatile atomic<_ITp>* __a,
|
---|
1516 | __atomic_diff_t<_ITp> __i) noexcept
|
---|
1517 | { return atomic_fetch_add_explicit(__a, __i, memory_order_seq_cst); }
|
---|
1518 |
|
---|
1519 | template<typename _ITp>
|
---|
1520 | inline _ITp
|
---|
1521 | atomic_fetch_sub(atomic<_ITp>* __a,
|
---|
1522 | __atomic_diff_t<_ITp> __i) noexcept
|
---|
1523 | { return atomic_fetch_sub_explicit(__a, __i, memory_order_seq_cst); }
|
---|
1524 |
|
---|
1525 | template<typename _ITp>
|
---|
1526 | inline _ITp
|
---|
1527 | atomic_fetch_sub(volatile atomic<_ITp>* __a,
|
---|
1528 | __atomic_diff_t<_ITp> __i) noexcept
|
---|
1529 | { return atomic_fetch_sub_explicit(__a, __i, memory_order_seq_cst); }
|
---|
1530 |
|
---|
1531 | template<typename _ITp>
|
---|
1532 | inline _ITp
|
---|
1533 | atomic_fetch_and(__atomic_base<_ITp>* __a,
|
---|
1534 | __atomic_val_t<_ITp> __i) noexcept
|
---|
1535 | { return atomic_fetch_and_explicit(__a, __i, memory_order_seq_cst); }
|
---|
1536 |
|
---|
1537 | template<typename _ITp>
|
---|
1538 | inline _ITp
|
---|
1539 | atomic_fetch_and(volatile __atomic_base<_ITp>* __a,
|
---|
1540 | __atomic_val_t<_ITp> __i) noexcept
|
---|
1541 | { return atomic_fetch_and_explicit(__a, __i, memory_order_seq_cst); }
|
---|
1542 |
|
---|
1543 | template<typename _ITp>
|
---|
1544 | inline _ITp
|
---|
1545 | atomic_fetch_or(__atomic_base<_ITp>* __a,
|
---|
1546 | __atomic_val_t<_ITp> __i) noexcept
|
---|
1547 | { return atomic_fetch_or_explicit(__a, __i, memory_order_seq_cst); }
|
---|
1548 |
|
---|
1549 | template<typename _ITp>
|
---|
1550 | inline _ITp
|
---|
1551 | atomic_fetch_or(volatile __atomic_base<_ITp>* __a,
|
---|
1552 | __atomic_val_t<_ITp> __i) noexcept
|
---|
1553 | { return atomic_fetch_or_explicit(__a, __i, memory_order_seq_cst); }
|
---|
1554 |
|
---|
1555 | template<typename _ITp>
|
---|
1556 | inline _ITp
|
---|
1557 | atomic_fetch_xor(__atomic_base<_ITp>* __a,
|
---|
1558 | __atomic_val_t<_ITp> __i) noexcept
|
---|
1559 | { return atomic_fetch_xor_explicit(__a, __i, memory_order_seq_cst); }
|
---|
1560 |
|
---|
1561 | template<typename _ITp>
|
---|
1562 | inline _ITp
|
---|
1563 | atomic_fetch_xor(volatile __atomic_base<_ITp>* __a,
|
---|
1564 | __atomic_val_t<_ITp> __i) noexcept
|
---|
1565 | { return atomic_fetch_xor_explicit(__a, __i, memory_order_seq_cst); }
|
---|
1566 |
|
---|
1567 | #if __cplusplus > 201703L
|
---|
1568 | #define __cpp_lib_atomic_float 201711L
|
---|
1569 | template<>
|
---|
1570 | struct atomic<float> : __atomic_float<float>
|
---|
1571 | {
|
---|
1572 | atomic() noexcept = default;
|
---|
1573 |
|
---|
1574 | constexpr
|
---|
1575 | atomic(float __fp) noexcept : __atomic_float<float>(__fp)
|
---|
1576 | { }
|
---|
1577 |
|
---|
1578 | atomic& operator=(const atomic&) volatile = delete;
|
---|
1579 | atomic& operator=(const atomic&) = delete;
|
---|
1580 |
|
---|
1581 | using __atomic_float<float>::operator=;
|
---|
1582 | };
|
---|
1583 |
|
---|
1584 | template<>
|
---|
1585 | struct atomic<double> : __atomic_float<double>
|
---|
1586 | {
|
---|
1587 | atomic() noexcept = default;
|
---|
1588 |
|
---|
1589 | constexpr
|
---|
1590 | atomic(double __fp) noexcept : __atomic_float<double>(__fp)
|
---|
1591 | { }
|
---|
1592 |
|
---|
1593 | atomic& operator=(const atomic&) volatile = delete;
|
---|
1594 | atomic& operator=(const atomic&) = delete;
|
---|
1595 |
|
---|
1596 | using __atomic_float<double>::operator=;
|
---|
1597 | };
|
---|
1598 |
|
---|
1599 | template<>
|
---|
1600 | struct atomic<long double> : __atomic_float<long double>
|
---|
1601 | {
|
---|
1602 | atomic() noexcept = default;
|
---|
1603 |
|
---|
1604 | constexpr
|
---|
1605 | atomic(long double __fp) noexcept : __atomic_float<long double>(__fp)
|
---|
1606 | { }
|
---|
1607 |
|
---|
1608 | atomic& operator=(const atomic&) volatile = delete;
|
---|
1609 | atomic& operator=(const atomic&) = delete;
|
---|
1610 |
|
---|
1611 | using __atomic_float<long double>::operator=;
|
---|
1612 | };
|
---|
1613 |
|
---|
1614 | #define __cpp_lib_atomic_ref 201806L
|
---|
1615 |
|
---|
1616 | /// Class template to provide atomic operations on a non-atomic variable.
|
---|
1617 | template<typename _Tp>
|
---|
1618 | struct atomic_ref : __atomic_ref<_Tp>
|
---|
1619 | {
|
---|
1620 | explicit
|
---|
1621 | atomic_ref(_Tp& __t) noexcept : __atomic_ref<_Tp>(__t)
|
---|
1622 | { }
|
---|
1623 |
|
---|
1624 | atomic_ref& operator=(const atomic_ref&) = delete;
|
---|
1625 |
|
---|
1626 | atomic_ref(const atomic_ref&) = default;
|
---|
1627 |
|
---|
1628 | using __atomic_ref<_Tp>::operator=;
|
---|
1629 | };
|
---|
1630 |
|
---|
1631 | #endif // C++2a
|
---|
1632 |
|
---|
1633 | /// @} group atomics
|
---|
1634 |
|
---|
1635 | _GLIBCXX_END_NAMESPACE_VERSION
|
---|
1636 | } // namespace
|
---|
1637 |
|
---|
1638 | #endif // C++11
|
---|
1639 |
|
---|
1640 | #endif // _GLIBCXX_ATOMIC
|
---|