<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <meta http-equiv="X-UA-Compatible" content="IE=9"/> <meta name="generator" content="Doxygen 1.8.15"/> <meta name="viewport" content="width=device-width, initial-scale=1"/> <title>libstdc++: thread Source File</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="dynsections.js"></script> <link href="navtree.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="resize.js"></script> <script type="text/javascript" src="navtreedata.js"></script> <script type="text/javascript" src="navtree.js"></script> <script type="text/javascript"> /* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */ $(document).ready(initResizable); /* @license-end */</script> <link href="doxygen.css" rel="stylesheet" type="text/css" /> </head> <body> <div id="top"><!-- do not remove this div, it is closed by doxygen! --> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td id="projectalign" style="padding-left: 0.5em;"> <div id="projectname">libstdc++ </div> </td> </tr> </tbody> </table> </div> <!-- end header part --> <!-- Generated by Doxygen 1.8.15 --> </div><!-- top --> <div id="side-nav" class="ui-resizable side-nav-resizable"> <div id="nav-tree"> <div id="nav-tree-contents"> <div id="nav-sync" class="sync"></div> </div> </div> <div id="splitbar" style="-moz-user-select:none;" class="ui-resizable-handle"> </div> </div> <script type="text/javascript"> /* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */ $(document).ready(function(){initNavTree('a00158_source.html','');}); /* @license-end */ </script> <div id="doc-content"> <div class="header"> <div class="headertitle"> <div class="title">thread</div> </div> </div><!--header--> <div class="contents"> <a href="a00158.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// <thread> -*- C++ -*-</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> </div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// Copyright (C) 2008-2018 Free Software Foundation, Inc.</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">//</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// This file is part of the GNU ISO C++ Library. This library is free</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">// software; you can redistribute it and/or modify it under the</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// terms of the GNU General Public License as published by the</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// Free Software Foundation; either version 3, or (at your option)</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// any later version.</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// This library is distributed in the hope that it will be useful,</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment">// GNU General Public License for more details.</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">// Under Section 7 of GPL version 3, you are granted additional</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">// permissions described in the GCC Runtime Library Exception, version</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">// 3.1, as published by the Free Software Foundation.</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">// You should have received a copy of the GNU General Public License and</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">// a copy of the GCC Runtime Library Exception along with this program;</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">// <http://www.gnu.org/licenses/>.</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"></span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">/** @file include/thread</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * This is a Standard C++ Library header.</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> */</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#ifndef _GLIBCXX_THREAD</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#define _GLIBCXX_THREAD 1</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> </div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#pragma GCC system_header</span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#if __cplusplus < 201103L</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor"># include <<a class="code" href="a00299.html">bits/c++0x_warning.h</a>></span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> </div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#include <<a class="code" href="a00050.html">chrono</a>></span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#include <<a class="code" href="a00107.html">memory</a>></span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor">#include <<a class="code" href="a00161.html">tuple</a>></span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#include <<a class="code" href="a00194.html">cerrno</a>></span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor">#include <<a class="code" href="a00356.html">bits/functexcept.h</a>></span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor">#include <<a class="code" href="a00359.html">bits/functional_hash.h</a>></span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="preprocessor">#include <<a class="code" href="a00380.html">bits/invoke.h</a>></span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor">#include <bits/gthr.h></span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor">#if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1)</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="keyword">namespace </span><a class="code" href="a01538.html">std</a> _GLIBCXX_VISIBILITY(default)</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> {</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> _GLIBCXX_BEGIN_NAMESPACE_VERSION</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"></span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> /**</span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> * @defgroup threads Threads</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"> * @ingroup concurrency</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"> *</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> * Classes for thread support.</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> * @{</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> */</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"></span></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> /// thread</span></div><div class="line"><a name="l00062"></a><span class="lineno"><a class="line" href="a02856.html"> 62</a></span> <span class="comment"></span> <span class="keyword">class </span><a class="code" href="a02856.html">thread</a></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  {</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="comment">// Abstract base class for types that wrap arbitrary functors to be</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="comment">// invoked in the new thread of execution.</span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keyword">struct </span>_State</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  {</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keyword">virtual</span> ~_State();</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span> _M_run() = 0;</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  };</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keyword">using</span> <a class="code" href="a07964.html">_State_ptr</a> = <a class="code" href="a07964.html">unique_ptr<_State></a>;</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> </div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="keyword">typedef</span> __gthread_t native_handle_type;</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment"></span></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment"> /// thread::id</span></div><div class="line"><a name="l00077"></a><span class="lineno"><a class="line" href="a02864.html"> 77</a></span> <span class="comment"></span> <span class="keyword">class </span><a class="code" href="a02864.html">id</a></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  {</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  native_handle_type _M_thread;</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span> </div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <a class="code" href="a02864.html">id</a>() noexcept : _M_thread() { }</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> </div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keyword">explicit</span></div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <a class="code" href="a02864.html">id</a>(native_handle_type __id) : _M_thread(__id) { }</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> </div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="a02856.html">thread</a>;</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="a02836.html">hash</a><<a class="code" href="a02856.html">thread</a>::<a class="code" href="a02864.html">id</a>>;</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span> </div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  friend bool</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  operator==(thread::id __x, thread::id __y) noexcept;</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> </div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  friend bool</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  operator<(thread::id __x, thread::id __y) noexcept;</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> </div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  template<class _CharT, class _Traits></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  friend basic_ostream<_CharT, _Traits>&</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  operator<<(basic_ostream<_CharT, _Traits>& __out, thread::id __id);</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  };</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> </div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  private:</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  id _M_id;</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> </div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="comment">// _GLIBCXX_RESOLVE_LIB_DEFECTS</span></div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="comment">// 2097. packaged_task constructors should be constrained</span></div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  template<typename _Tp></div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  using __not_same = __not_<is_same<</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  typename remove_cv<typename remove_reference<_Tp>::type>::type,</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  thread>>;</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span> </div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  public:</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  thread() noexcept = default;</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> </div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  template<typename _Callable, typename... _Args,</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  typename = _Require<__not_same<_Callable>>></div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  explicit</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  thread(_Callable&& __f, _Args&&... __args)</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  {</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  static_assert( __is_invocable<typename decay<_Callable>::type,</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  typename decay<_Args>::type...>::value,</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  "std::thread arguments must be invocable after conversion to rvalues"</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  );</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span> </div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span> #ifdef GTHR_ACTIVE_PROXY</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="comment">// Create a reference to pthread_create, not just the gthr weak symbol.</span></div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  auto __depend = reinterpret_cast<void(*)()>(&pthread_create);</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span> #else</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  auto __depend = nullptr;</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> #endif</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  _M_start_thread(_S_make_state(</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  __make_invoker(std::forward<_Callable>(__f),</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  std::forward<_Args>(__args)...)),</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  __depend);</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  }</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span> </div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  ~thread()</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  {</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  if (joinable())</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  std::terminate();</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  }</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span> </div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  thread(const thread&) = delete;</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span> </div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  thread(thread&& __t) noexcept</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  { swap(__t); }</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span> </div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  thread& operator=(const thread&) = delete;</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span> </div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  thread& operator=(thread&& __t) noexcept</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  {</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  if (joinable())</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  std::terminate();</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  swap(__t);</div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  return *this;</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  }</div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span> </div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  void</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  swap(thread& __t) noexcept</div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  { std::swap(_M_id, __t._M_id); }</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span> </div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  bool</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  joinable() const noexcept</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  { return !(_M_id == id()); }</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span> </div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  void</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  join();</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span> </div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  void</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  detach();</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span> </div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  thread::id</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  get_id() const noexcept</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  { return _M_id; }</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="comment"></span></div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="comment"> /** @pre thread is joinable</span></div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span> <span class="comment"> */</span></div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  native_handle_type</div><div class="line"><a name="l00179"></a><span class="lineno"><a class="line" href="a02856.html#a6d1397f899cbcd9d48a6cb6b1df5ab1c"> 179</a></span>  native_handle()</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  { return _M_id._M_thread; }</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span> </div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="comment">// Returns a value that hints at the number of hardware thread contexts.</span></div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  static unsigned int</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  hardware_concurrency() noexcept;</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span> </div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  private:</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  template<typename _Callable></div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  struct _State_impl : public _State</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  {</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  _Callable _M_func;</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span> </div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  _State_impl(_Callable&& __f) : _M_func(std::forward<_Callable>(__f))</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  { }</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span> </div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  void</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  _M_run() { _M_func(); }</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  };</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span> </div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  void</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  _M_start_thread(_State_ptr, void (*)());</div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span> </div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  template<typename _Callable></div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  static _State_ptr</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  _S_make_state(_Callable&& __f)</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  {</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  using _Impl = _State_impl<_Callable>;</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  return _State_ptr{new _Impl{std::forward<_Callable>(__f)}};</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  }</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span> #if _GLIBCXX_THREAD_ABI_COMPAT</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  public:</div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  struct _Impl_base;</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  typedef shared_ptr<_Impl_base> __shared_base_type;</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  struct _Impl_base</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  {</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  __shared_base_type _M_this_ptr;</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  virtual ~_Impl_base() = default;</div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  virtual void _M_run() = 0;</div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  };</div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span> </div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  private:</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  void</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  _M_start_thread(__shared_base_type, void (*)());</div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span> </div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  void</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  _M_start_thread(__shared_base_type);</div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span> #endif</div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span> </div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  private:</div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="comment">// A call wrapper that does INVOKE(forwarded tuple elements...)</span></div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  template<typename _Tuple></div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  struct _Invoker</div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  {</div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  _Tuple _M_t;</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span> </div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  template<size_t _Index></div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  static __tuple_element_t<_Index, _Tuple>&&</div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  _S_declval();</div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span> </div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  template<size_t... _Ind></div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  auto</div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  _M_invoke(_Index_tuple<_Ind...>)</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  noexcept(noexcept(std::__invoke(_S_declval<_Ind>()...)))</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  -> decltype(std::__invoke(_S_declval<_Ind>()...))</div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  { return std::__invoke(std::get<_Ind>(std::move(_M_t))...); }</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span> </div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  using _Indices</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  = typename _Build_index_tuple<tuple_size<_Tuple>::value>::__type;</div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span> </div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  auto</div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  operator()()</div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  noexcept(noexcept(std::declval<_Invoker&>()._M_invoke(_Indices())))</div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  -> decltype(std::declval<_Invoker&>()._M_invoke(_Indices()))</div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  { return _M_invoke(_Indices()); }</div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  };</div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span> </div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  template<typename... _Tp></div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  using __decayed_tuple = tuple<typename std::decay<_Tp>::type...>;</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span> </div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  public:</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <span class="comment">// Returns a call wrapper that stores</span></div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <span class="comment">// tuple{DECAY_COPY(__callable), DECAY_COPY(__args)...}.</span></div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  template<typename _Callable, typename... _Args></div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  static _Invoker<__decayed_tuple<_Callable, _Args...>></div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  __make_invoker(_Callable&& __callable, _Args&&... __args)</div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  {</div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  return { __decayed_tuple<_Callable, _Args...>{</div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  std::forward<_Callable>(__callable), std::forward<_Args>(__args)...</div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  } };</div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  }</div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  };</div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span> </div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  inline void</div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  swap(thread& __x, thread& __y) noexcept</div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  { __x.swap(__y); }</div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span> </div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  inline bool</div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  operator==(thread::id __x, thread::id __y) noexcept</div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  {</div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <span class="comment">// pthread_equal is undefined if either thread ID is not valid, so we</span></div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <span class="comment">// can't safely use __gthread_equal on default-constructed values (nor</span></div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  <span class="comment">// the non-zero value returned by this_thread::get_id() for</span></div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <span class="comment">// single-threaded programs using GNU libc). Assume EqualityComparable.</span></div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  return __x._M_thread == __y._M_thread;</div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  }</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span> </div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  inline bool</div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  operator!=(thread::id __x, thread::id __y) noexcept</div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  { return !(__x == __y); }</div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span> </div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  inline bool</div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  operator<(thread::id __x, thread::id __y) noexcept</div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  {</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  <span class="comment">// Pthreads doesn't define any way to do this, so we just have to</span></div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <span class="comment">// assume native_handle_type is LessThanComparable.</span></div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  return __x._M_thread < __y._M_thread;</div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  }</div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span> </div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  inline bool</div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  operator<=(thread::id __x, thread::id __y) noexcept</div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  { return !(__y < __x); }</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span> </div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  inline bool</div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  operator>(thread::id __x, thread::id __y) noexcept</div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  { return __y < __x; }</div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span> </div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  inline bool</div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  operator>=(thread::id __x, thread::id __y) noexcept</div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  { return !(__x < __y); }</div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span> </div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="comment">// DR 889.</span><span class="comment"></span></div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span> <span class="comment"> /// std::hash specialization for thread::id.</span></div><div class="line"><a name="l00312"></a><span class="lineno"> 312</span> <span class="comment"></span> template<></div><div class="line"><a name="l00313"></a><span class="lineno"><a class="line" href="a02876.html"> 313</a></span>  struct hash<thread::id></div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  : public __hash_base<size_t, thread::id></div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  {</div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  size_t</div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  operator()(const thread::id& __id) const noexcept</div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  { return std::_Hash_impl::hash(__id._M_thread); }</div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  };</div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span> </div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  template<class _CharT, class _Traits></div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  inline basic_ostream<_CharT, _Traits>&</div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  operator<<(basic_ostream<_CharT, _Traits>& __out, thread::id __id)</div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  {</div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  if (__id == thread::id())</div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  return __out << "thread::id of a non-executing thread";</div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  else</div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  return __out << __id._M_thread;</div><div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  }</div><div class="line"><a name="l00330"></a><span class="lineno"> 330</span> <span class="comment"></span></div><div class="line"><a name="l00331"></a><span class="lineno"> 331</span> <span class="comment"> /** @namespace std::this_thread</span></div><div class="line"><a name="l00332"></a><span class="lineno"> 332</span> <span class="comment"> * @brief ISO C++ 2011 entities sub-namespace for thread.</span></div><div class="line"><a name="l00333"></a><span class="lineno"> 333</span> <span class="comment"> * 30.3.2 Namespace this_thread.</span></div><div class="line"><a name="l00334"></a><span class="lineno"> 334</span> <span class="comment"> */</span></div><div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  namespace this_thread</div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  {<span class="comment"></span></div><div class="line"><a name="l00337"></a><span class="lineno"> 337</span> <span class="comment"> /// get_id</span></div><div class="line"><a name="l00338"></a><span class="lineno"> 338</span> <span class="comment"></span> inline thread::id</div><div class="line"><a name="l00339"></a><span class="lineno"><a class="line" href="a01556.html#ad4ed754e0d5a61283cf36f4918ab3444"> 339</a></span>  get_id() noexcept</div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  {</div><div class="line"><a name="l00341"></a><span class="lineno"> 341</span> #ifdef __GLIBC__</div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  <span class="comment">// For the GNU C library pthread_self() is usable without linking to</span></div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  <span class="comment">// libpthread.so but returns 0, so we cannot use it in single-threaded</span></div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  <span class="comment">// programs, because this_thread::get_id() != thread::id{} must be true.</span></div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  <span class="comment">// We know that pthread_t is an integral type in the GNU C library.</span></div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  if (!__gthread_active_p())</div><div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  return thread::id(1);</div><div class="line"><a name="l00348"></a><span class="lineno"> 348</span> #endif</div><div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  return thread::id(__gthread_self());</div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  }</div><div class="line"><a name="l00351"></a><span class="lineno"> 351</span> <span class="comment"></span></div><div class="line"><a name="l00352"></a><span class="lineno"> 352</span> <span class="comment"> /// yield</span></div><div class="line"><a name="l00353"></a><span class="lineno"> 353</span> <span class="comment"></span> inline void</div><div class="line"><a name="l00354"></a><span class="lineno"><a class="line" href="a01556.html#a2a1ecebfe73aaa3eb40e909991bbd16e"> 354</a></span>  yield() noexcept</div><div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  {</div><div class="line"><a name="l00356"></a><span class="lineno"> 356</span> #ifdef _GLIBCXX_USE_SCHED_YIELD</div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  __gthread_yield();</div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span> #endif</div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  }</div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span> </div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  void</div><div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  __sleep_for(chrono::seconds, chrono::nanoseconds);</div><div class="line"><a name="l00363"></a><span class="lineno"> 363</span> <span class="comment"></span></div><div class="line"><a name="l00364"></a><span class="lineno"> 364</span> <span class="comment"> /// sleep_for</span></div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span> <span class="comment"></span> template<typename _Rep, typename _Period></div><div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  inline void</div><div class="line"><a name="l00367"></a><span class="lineno"><a class="line" href="a01556.html#a7ddb6a2d48e0bb2cace6dd67c4c38596"> 367</a></span>  sleep_for(const chrono::duration<_Rep, _Period>& __rtime)</div><div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  {</div><div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  if (__rtime <= __rtime.zero())</div><div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  return;</div><div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  auto __s = chrono::duration_cast<chrono::seconds>(__rtime);</div><div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  auto __ns = chrono::duration_cast<chrono::nanoseconds>(__rtime - __s);</div><div class="line"><a name="l00373"></a><span class="lineno"> 373</span> #ifdef _GLIBCXX_USE_NANOSLEEP</div><div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  __gthread_time_t __ts =</div><div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  {</div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  static_cast<std::time_t>(__s.count()),</div><div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  static_cast<long>(__ns.count())</div><div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  };</div><div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  while (::nanosleep(&__ts, &__ts) == -1 && errno == EINTR)</div><div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  { }</div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span> #else</div><div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  __sleep_for(__s, __ns);</div><div class="line"><a name="l00383"></a><span class="lineno"> 383</span> #endif</div><div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  }</div><div class="line"><a name="l00385"></a><span class="lineno"> 385</span> <span class="comment"></span></div><div class="line"><a name="l00386"></a><span class="lineno"> 386</span> <span class="comment"> /// sleep_until</span></div><div class="line"><a name="l00387"></a><span class="lineno"> 387</span> <span class="comment"></span> template<typename _Clock, typename _Duration></div><div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  inline void</div><div class="line"><a name="l00389"></a><span class="lineno"><a class="line" href="a01556.html#a277096a2cdd1fc66b7569f457b731bfb"> 389</a></span>  sleep_until(const chrono::time_point<_Clock, _Duration>& __atime)</div><div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  {</div><div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  auto __now = _Clock::now();</div><div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  if (_Clock::is_steady)</div><div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  {</div><div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  if (__now < __atime)</div><div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  sleep_for(__atime - __now);</div><div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  return;</div><div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  }</div><div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  while (__now < __atime)</div><div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  {</div><div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  sleep_for(__atime - __now);</div><div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  __now = _Clock::now();</div><div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  }</div><div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  }</div><div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  }</div><div class="line"><a name="l00405"></a><span class="lineno"> 405</span> </div><div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  <span class="comment">// @} group threads</span></div><div class="line"><a name="l00407"></a><span class="lineno"> 407</span> </div><div class="line"><a name="l00408"></a><span class="lineno"> 408</span> _GLIBCXX_END_NAMESPACE_VERSION</div><div class="line"><a name="l00409"></a><span class="lineno"> 409</span> } <span class="comment">// namespace</span></div><div class="line"><a name="l00410"></a><span class="lineno"> 410</span> </div><div class="line"><a name="l00411"></a><span class="lineno"> 411</span> #endif <span class="comment">// _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1</span></div><div class="line"><a name="l00412"></a><span class="lineno"> 412</span> </div><div class="line"><a name="l00413"></a><span class="lineno"> 413</span> #endif <span class="comment">// C++11</span></div><div class="line"><a name="l00414"></a><span class="lineno"> 414</span> </div><div class="line"><a name="l00415"></a><span class="lineno"> 415</span> #endif <span class="comment">// _GLIBCXX_THREAD</span></div><div class="ttc" id="a00356_html"><div class="ttname"><a href="a00356.html">functexcept.h</a></div></div> <div class="ttc" id="a02836_html"><div class="ttname"><a href="a02836.html">std::hash</a></div><div class="ttdoc">Primary class template hash.</div><div class="ttdef"><b>Definition:</b> <a 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