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<a href="a00074.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">// <future> -*- 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) 2009-2018 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/future</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_FUTURE</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#define _GLIBCXX_FUTURE 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="a00110.html">mutex</a>></span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#include <<a class="code" href="a00158.html">thread</a>></span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor">#include <<a class="code" href="a00059.html">condition_variable</a>></span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#include <<a class="code" href="a00155.html">system_error</a>></span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor">#include <<a class="code" href="a00044.html">atomic</a>></span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor">#include <<a class="code" href="a00278.html">bits/atomic_futex.h</a>></span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="preprocessor">#include <<a class="code" href="a00356.html">bits/functexcept.h</a>></span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor">#include <<a class="code" href="a00380.html">bits/invoke.h</a>></span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="preprocessor">#include <<a class="code" href="a00620.html">bits/unique_ptr.h</a>></span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor">#include <bits/shared_ptr.h></span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="preprocessor">#include <<a class="code" href="a00521.html">bits/std_function.h</a>></span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor">#include <bits/uses_allocator.h></span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor">#include <<a class="code" href="a00269.html">bits/allocated_ptr.h</a>></span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="preprocessor">#include <<a class="code" href="a01016.html">ext/aligned_buffer.h</a>></span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="keyword">namespace </span><a class="code" href="a01538.html">std</a> _GLIBCXX_VISIBILITY(default)</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> {</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> _GLIBCXX_BEGIN_NAMESPACE_VERSION</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"> /**</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> * @defgroup futures Futures</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> * @ingroup concurrency</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"> * Classes for futures support.</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> * @{</span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"> */</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"></span></div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> /// Error code for futures</span></div><div class="line"><a name="l00066"></a><span class="lineno"><a class="line" href="a01469.html#ga61938f7ac25df97b5362109e61bb46a6"> 66</a></span> <span class="comment"></span> <span class="keyword">enum class</span> <a class="code" href="a01469.html#ga61938f7ac25df97b5362109e61bb46a6">future_errc</a></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  {</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  future_already_retrieved = 1,</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  promise_already_satisfied,</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  no_state,</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  broken_promise</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  };</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment"></span></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment"> /// Specialization.</span></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment"></span> <span class="keyword">template</span><></div><div class="line"><a name="l00076"></a><span class="lineno"><a class="line" href="a02224.html"> 76</a></span>  <span class="keyword">struct </span><a class="code" href="a02820.html">is_error_code_enum</a><<a class="code" href="a01469.html#ga61938f7ac25df97b5362109e61bb46a6">future_errc</a>> : <span class="keyword">public</span> <a class="code" href="a03040.html">true_type</a> { };</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment"></span></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment"> /// Points to a statically-allocated object derived from error_category.</span></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment"></span> <span class="keyword">const</span> error_category&</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <a class="code" href="a01469.html#ga5b4abfa468beb197d5bdac89e20afdb0">future_category</a>() noexcept;</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="comment"></span></div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="comment"> /// Overload for make_error_code.</span></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment"></span> inline <a class="code" href="a02840.html">error_code</a></div><div class="line"><a name="l00084"></a><span class="lineno"><a class="line" href="a01469.html#ga32bbe57d8ae969ac5cee4f0c48c3e63f"> 84</a></span>  make_error_code(<a class="code" href="a01469.html#ga61938f7ac25df97b5362109e61bb46a6">future_errc</a> __errc) noexcept</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  { <span class="keywordflow">return</span> <a class="code" href="a02840.html">error_code</a>(static_cast<int>(__errc), <a class="code" href="a01469.html#ga5b4abfa468beb197d5bdac89e20afdb0">future_category</a>()); }</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="comment"></span></div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="comment"> /// Overload for make_error_condition.</span></div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="comment"></span> <span class="keyword">inline</span> error_condition</div><div class="line"><a name="l00089"></a><span class="lineno"><a class="line" href="a01469.html#ga298f6b4607ddc74c173e6f8887f72047"> 89</a></span>  make_error_condition(<a class="code" href="a01469.html#ga61938f7ac25df97b5362109e61bb46a6">future_errc</a> __errc) noexcept</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  { <span class="keywordflow">return</span> <a class="code" href="a02844.html">error_condition</a>(static_cast<int>(__errc), <a class="code" href="a01469.html#ga5b4abfa468beb197d5bdac89e20afdb0">future_category</a>()); }</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment"></span></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment"> /**</span></div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment"> * @brief Exception type thrown by futures.</span></div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="comment"> * @ingroup exceptions</span></div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="comment"> */</span></div><div class="line"><a name="l00096"></a><span class="lineno"><a class="line" href="a02228.html"> 96</a></span>  <span class="keyword">class </span><a class="code" href="a02228.html">future_error</a> : <span class="keyword">public</span> <a class="code" href="a02784.html">logic_error</a></div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  {</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keyword">explicit</span></div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <a class="code" href="a02228.html">future_error</a>(<a class="code" href="a01469.html#ga61938f7ac25df97b5362109e61bb46a6">future_errc</a> __errc)</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  : <a class="code" href="a02228.html">future_error</a>(std::make_error_code(__errc))</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  { }</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> </div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keyword">virtual</span> ~<a class="code" href="a02228.html">future_error</a>() noexcept;</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> </div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keyword">virtual</span> <span class="keyword">const</span> <span class="keywordtype">char</span>*</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <a class="code" href="a02228.html#a95833ed17fb6f056709e29abdc50f50c">what</a>() <span class="keyword">const</span> noexcept;</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> </div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keyword">const</span> <a class="code" href="a02840.html">error_code</a>&</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  code() <span class="keyword">const</span> noexcept { <span class="keywordflow">return</span> _M_code; }</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>  <span class="keyword">private</span>:</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keyword">explicit</span></div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <a class="code" href="a02228.html">future_error</a>(<a class="code" href="a02840.html">error_code</a> __ec)</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  : <a class="code" href="a02784.html#a48e6f223bbd547dcea0d5efdb54b4951">logic_error</a>(<span class="stringliteral">"std::future_error: "</span> + __ec.message()), _M_code(__ec)</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  { }</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span> </div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keyword">friend</span> <span class="keywordtype">void</span> __throw_future_error(<span class="keywordtype">int</span>);</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>  <a class="code" href="a02840.html">error_code</a> _M_code;</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  };</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span> </div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="comment">// Forward declarations.</span></div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res></div><div class="line"><a name="l00125"></a><span class="lineno"><a class="line" href="a02232.html"> 125</a></span>  <span class="keyword">class </span><a class="code" href="a02232.html">future</a>;</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> </div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res></div><div class="line"><a name="l00128"></a><span class="lineno"><a class="line" href="a02236.html"> 128</a></span>  <span class="keyword">class </span><a class="code" href="a02236.html">shared_future</a>;</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span> </div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Signature></div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keyword">class </span>packaged_task;</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span> </div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res></div><div class="line"><a name="l00134"></a><span class="lineno"><a class="line" href="a02244.html"> 134</a></span>  <span class="keyword">class </span><a class="code" href="a02244.html">promise</a>;</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="comment"></span></div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="comment"> /// Launch code for futures</span></div><div class="line"><a name="l00137"></a><span class="lineno"><a class="line" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b"> 137</a></span> <span class="comment"></span> <span class="keyword">enum class</span> <a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a></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>  <a class="code" href="a01469.html#gae1d80ff37cef48666bea37bcff54f6da">async</a> = 1,</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  deferred = 2</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>  constexpr <a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a> <a class="code" href="a01538.html#a7e7330f9af270f5bd90341928263da8d">operator&</a>(<a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a> __x, <a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a> __y)</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>  <span class="keywordflow">return</span> static_cast<launch>(</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  static_cast<int>(__x) & static_cast<int>(__y));</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> </div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  constexpr <a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a> <a class="code" href="a01538.html#a37b7f9acb3d4f471410857a524425f03">operator|</a>(<a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a> __x, <a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a> __y)</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  {</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordflow">return</span> static_cast<launch>(</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  static_cast<int>(__x) | static_cast<int>(__y));</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  }</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span> </div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  constexpr <a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a> <a class="code" href="a01538.html#a0eec0ec1834b05e931022533e2ae4d03">operator^</a>(<a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a> __x, <a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a> __y)</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>  <span class="keywordflow">return</span> static_cast<launch>(</div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  static_cast<int>(__x) ^ static_cast<int>(__y));</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  }</div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span> </div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  constexpr <a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a> operator~(<a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a> __x)</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  { <span class="keywordflow">return</span> static_cast<launch>(~static_cast<int>(__x)); }</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span> </div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keyword">inline</span> <a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a>& operator&=(<a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a>& __x, <a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a> __y)</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  { <span class="keywordflow">return</span> __x = __x & __y; }</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span> </div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="keyword">inline</span> <a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a>& operator|=(<a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a>& __x, <a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a> __y)</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  { <span class="keywordflow">return</span> __x = __x | __y; }</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span> </div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="keyword">inline</span> <a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a>& operator^=(<a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a>& __x, <a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a> __y)</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  { <span class="keywordflow">return</span> __x = __x ^ __y; }</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="comment"></span></div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span> <span class="comment"> /// Status code for futures</span></div><div class="line"><a name="l00174"></a><span class="lineno"><a class="line" href="a01469.html#ga528eb8f3b350394c0406d4d58ab7dbf4"> 174</a></span> <span class="comment"></span> <span class="keyword">enum class</span> <a class="code" href="a01469.html#ga528eb8f3b350394c0406d4d58ab7dbf4">future_status</a></div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  {</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  ready,</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  timeout,</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  deferred</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  };</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span> </div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="comment">// _GLIBCXX_RESOLVE_LIB_DEFECTS</span></div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="comment">// 2021. Further incorrect usages of result_of</span></div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Fn, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keyword">using</span> __async_result_of = <span class="keyword">typename</span> result_of<</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="keyword">typename</span> decay<_Fn>::type(<span class="keyword">typename</span> decay<_Args>::type...)>::type;</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span> </div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Fn, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  future<__async_result_of<_Fn, _Args...>></div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <a class="code" href="a01469.html#gae1d80ff37cef48666bea37bcff54f6da">async</a>(<a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a> __policy, _Fn&& __fn, _Args&&... __args);</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span> </div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Fn, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  future<__async_result_of<_Fn, _Args...>></div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <a class="code" href="a01469.html#gae1d80ff37cef48666bea37bcff54f6da">async</a>(_Fn&& __fn, _Args&&... __args);</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> <span class="preprocessor">#if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1)</span></div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span> <span class="comment"></span></div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span> <span class="comment"> /// Base class and enclosing scope.</span></div><div class="line"><a name="l00198"></a><span class="lineno"><a class="line" href="a02248.html"> 198</a></span> <span class="comment"></span> <span class="keyword">struct </span><a class="code" href="a02248.html">__future_base</a></div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  {<span class="comment"></span></div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="comment"> /// Base class for results.</span></div><div class="line"><a name="l00201"></a><span class="lineno"><a class="line" href="a02252.html"> 201</a></span> <span class="comment"></span> <span class="keyword">struct </span><a class="code" href="a02252.html">_Result_base</a></div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  {</div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <a class="code" href="a05428.html">exception_ptr</a> _M_error;</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span> </div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <a class="code" href="a02252.html">_Result_base</a>(<span class="keyword">const</span> <a class="code" href="a02252.html">_Result_base</a>&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <a class="code" href="a02252.html">_Result_base</a>& operator=(<span class="keyword">const</span> <a class="code" href="a02252.html">_Result_base</a>&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span> </div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="comment">// _M_destroy() allows derived classes to control deallocation</span></div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span> _M_destroy() = 0;</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span> </div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keyword">struct </span>_Deleter</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  {</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keywordtype">void</span> operator()(<a class="code" href="a02252.html">_Result_base</a>* __fr)<span class="keyword"> const </span>{ __fr->_M_destroy(); }</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> </div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="keyword">protected</span>:</div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <a class="code" href="a02252.html">_Result_base</a>();</div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="keyword">virtual</span> ~<a class="code" href="a02252.html">_Result_base</a>();</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> <span class="comment"></span></div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span> <span class="comment"> /// A unique_ptr for result objects.</span></div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Res></div><div class="line"><a name="l00223"></a><span class="lineno"><a class="line" href="a02248.html#a832cc3cad4729e395bea2475e1b3a741"> 223</a></span>  <span class="keyword">using</span> <a class="code" href="a07964.html">_Ptr</a> = <a class="code" href="a07964.html">unique_ptr<_Res, _Result_base::_Deleter></a>;</div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span> <span class="comment"></span></div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span> <span class="comment"> /// A result object that has storage for an object of type _Res.</span></div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Res></div><div class="line"><a name="l00227"></a><span class="lineno"><a class="line" href="a02260.html"> 227</a></span>  <span class="keyword">struct </span><a class="code" href="a02260.html">_Result</a> : <a class="code" href="a02252.html">_Result_base</a></div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  {</div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  __gnu_cxx::__aligned_buffer<_Res> _M_storage;</div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  <span class="keywordtype">bool</span> _M_initialized;</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>  <span class="keyword">public</span>:</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="keyword">typedef</span> _Res result_type;</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span> </div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <a class="code" href="a02260.html">_Result</a>() noexcept : _M_initialized() { }</div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span> </div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  ~<a class="code" href="a02260.html">_Result</a>()</div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  {</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keywordflow">if</span> (_M_initialized)</div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  _M_value().~_Res();</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  }</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span> </div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <span class="comment">// Return lvalue, future will add const or rvalue-reference</span></div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  _Res&</div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  _M_value() noexcept { <span class="keywordflow">return</span> *_M_storage._M_ptr(); }</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span> </div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  _M_set(<span class="keyword">const</span> _Res& __res)</div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  {</div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  ::new (_M_storage._M_addr()) _Res(__res);</div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  _M_initialized = <span class="keyword">true</span>;</div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  }</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>  <span class="keywordtype">void</span></div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  _M_set(_Res&& __res)</div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  {</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  ::new (_M_storage._M_addr()) _Res(std::move(__res));</div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  _M_initialized = <span class="keyword">true</span>;</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  }</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span> </div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  <span class="keywordtype">void</span> _M_destroy() { <span class="keyword">delete</span> <span class="keyword">this</span>; }</div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  };</div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span> <span class="comment"></span></div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span> <span class="comment"> /// A result object that uses an allocator.</span></div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span> _Alloc></div><div class="line"><a name="l00268"></a><span class="lineno"><a class="line" href="a02264.html"> 268</a></span>  <span class="keyword">struct </span><a class="code" href="a02264.html">_Result_alloc</a> final : <a class="code" href="a02260.html">_Result</a><_Res>, _Alloc</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>  <span class="keyword">using</span> __allocator_type = __alloc_rebind<_Alloc, _Result_alloc>;</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>  <span class="keyword">explicit</span></div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <a class="code" href="a02264.html">_Result_alloc</a>(<span class="keyword">const</span> _Alloc& __a) : <a class="code" href="a02260.html">_Result<_Res></a>(), _Alloc(__a)</div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  { }</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>  <span class="keyword">private</span>:</div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  <span class="keywordtype">void</span> _M_destroy()</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>  __allocator_type __a(*<span class="keyword">this</span>);</div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <a class="code" href="a04692.html">__allocated_ptr<__allocator_type></a> __guard_ptr{ __a, <span class="keyword">this</span> };</div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  this->~<a class="code" href="a02264.html">_Result_alloc</a>();</div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  }</div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  };</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>  <span class="comment">// Create a result object that uses an allocator.</span></div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span> _Allocator></div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="keyword">static</span> <a class="code" href="a07964.html">_Ptr<_Result_alloc<_Res, _Allocator></a>></div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  _S_allocate_result(<span class="keyword">const</span> _Allocator& __a)</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>  <span class="keyword">using</span> __result_type = <a class="code" href="a02264.html">_Result_alloc<_Res, _Allocator></a>;</div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  <span class="keyword">typename</span> __result_type::__allocator_type __a2(__a);</div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="keyword">auto</span> __guard = <a class="code" href="a01538.html#a1fa3f7679aec1619e37fddf24eb70a11">std::__allocate_guarded</a>(__a2);</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  __result_type* __p = ::new((<span class="keywordtype">void</span>*)__guard.get()) __result_type{__a};</div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  __guard = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  <span class="keywordflow">return</span> _Ptr<__result_type>(__p);</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>  <span class="comment">// Keep it simple for std::allocator.</span></div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <span class="keyword">static</span> _Ptr<_Result<_Res>></div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  _S_allocate_result(<span class="keyword">const</span> <a class="code" href="a04704.html">std::allocator<_Tp></a>& __a)</div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  {</div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <span class="keywordflow">return</span> _Ptr<_Result<_Res>>(<span class="keyword">new</span> _Result<_Res>);</div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  }</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>  <span class="comment">// Base class for various types of shared state created by an</span></div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="comment">// asynchronous provider (such as a std::promise) and shared with one</span></div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <span class="comment">// or more associated futures.</span></div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <span class="keyword">class </span>_State_baseV2</div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  {</div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  <span class="keyword">typedef</span> _Ptr<_Result_base> _Ptr_type;</div><div class="line"><a name="l00312"></a><span class="lineno"> 312</span> </div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  <span class="keyword">enum</span> _Status : <span class="keywordtype">unsigned</span> {</div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  __not_ready,</div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  __ready</div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  };</div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span> </div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  _Ptr_type _M_result;</div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  __atomic_futex_unsigned<> _M_status;</div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  atomic_flag _M_retrieved = ATOMIC_FLAG_INIT;</div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  once_flag _M_once;</div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span> </div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  _State_baseV2() noexcept : _M_result(), _M_status(_Status::__not_ready)</div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  { }</div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  _State_baseV2(<span class="keyword">const</span> _State_baseV2&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  _State_baseV2& operator=(<span class="keyword">const</span> _State_baseV2&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  <span class="keyword">virtual</span> ~_State_baseV2() = <span class="keywordflow">default</span>;</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>  _Result_base&</div><div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  wait()</div><div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  {</div><div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  <span class="comment">// Run any deferred function or join any asynchronous thread:</span></div><div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  _M_complete_async();</div><div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  <span class="comment">// Acquire MO makes sure this synchronizes with the thread that made</span></div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  <span class="comment">// the future ready.</span></div><div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  _M_status._M_load_when_equal(_Status::__ready, memory_order_acquire);</div><div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  <span class="keywordflow">return</span> *_M_result;</div><div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  }</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>  <span class="keyword">template</span><<span class="keyword">typename</span> _Rep, <span class="keyword">typename</span> _Period></div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  <a class="code" href="a01469.html#ga528eb8f3b350394c0406d4d58ab7dbf4">future_status</a></div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  wait_for(<span class="keyword">const</span> chrono::duration<_Rep, _Period>& __rel)</div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  {</div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  <span class="comment">// First, check if the future has been made ready. Use acquire MO</span></div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  <span class="comment">// to synchronize with the thread that made it ready.</span></div><div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  <span class="keywordflow">if</span> (_M_status._M_load(memory_order_acquire) == _Status::__ready)</div><div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  <span class="keywordflow">return</span> future_status::ready;</div><div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <span class="keywordflow">if</span> (_M_is_deferred_future())</div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  <span class="keywordflow">return</span> future_status::deferred;</div><div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="keywordflow">if</span> (_M_status._M_load_when_equal_for(_Status::__ready,</div><div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  memory_order_acquire, __rel))</div><div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  {</div><div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  <span class="comment">// _GLIBCXX_RESOLVE_LIB_DEFECTS</span></div><div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  <span class="comment">// 2100. timed waiting functions must also join</span></div><div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  <span class="comment">// This call is a no-op by default except on an async future,</span></div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  <span class="comment">// in which case the async thread is joined. It's also not a</span></div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  <span class="comment">// no-op for a deferred future, but such a future will never</span></div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  <span class="comment">// reach this point because it returns future_status::deferred</span></div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  <span class="comment">// instead of waiting for the future to become ready (see</span></div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  <span class="comment">// above). Async futures synchronize in this call, so we need</span></div><div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  <span class="comment">// no further synchronization here.</span></div><div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  _M_complete_async();</div><div class="line"><a name="l00364"></a><span class="lineno"> 364</span> </div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  <span class="keywordflow">return</span> future_status::ready;</div><div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  }</div><div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  <span class="keywordflow">return</span> future_status::timeout;</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> </div><div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Clock, <span class="keyword">typename</span> _Duration></div><div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  <a class="code" href="a01469.html#ga528eb8f3b350394c0406d4d58ab7dbf4">future_status</a></div><div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  wait_until(<span class="keyword">const</span> chrono::time_point<_Clock, _Duration>& __abs)</div><div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  {</div><div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  <span class="comment">// First, check if the future has been made ready. Use acquire MO</span></div><div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  <span class="comment">// to synchronize with the thread that made it ready.</span></div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  <span class="keywordflow">if</span> (_M_status._M_load(memory_order_acquire) == _Status::__ready)</div><div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  <span class="keywordflow">return</span> future_status::ready;</div><div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  <span class="keywordflow">if</span> (_M_is_deferred_future())</div><div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  <span class="keywordflow">return</span> future_status::deferred;</div><div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  <span class="keywordflow">if</span> (_M_status._M_load_when_equal_until(_Status::__ready,</div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  memory_order_acquire, __abs))</div><div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  {</div><div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  <span class="comment">// _GLIBCXX_RESOLVE_LIB_DEFECTS</span></div><div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <span class="comment">// 2100. timed waiting functions must also join</span></div><div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  <span class="comment">// See wait_for(...) above.</span></div><div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  _M_complete_async();</div><div class="line"><a name="l00387"></a><span class="lineno"> 387</span> </div><div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  <span class="keywordflow">return</span> future_status::ready;</div><div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  }</div><div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  <span class="keywordflow">return</span> future_status::timeout;</div><div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  }</div><div class="line"><a name="l00392"></a><span class="lineno"> 392</span> </div><div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  <span class="comment">// Provide a result to the shared state and make it ready.</span></div><div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  <span class="comment">// Calls at most once: _M_result = __res();</span></div><div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  _M_set_result(<span class="keyword">function</span><_Ptr_type()> __res, <span class="keywordtype">bool</span> __ignore_failure = <span class="keyword">false</span>)</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>  <span class="keywordtype">bool</span> __did_set = <span class="keyword">false</span>;</div><div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  <span class="comment">// all calls to this function are serialized,</span></div><div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  <span class="comment">// side-effects of invoking __res only happen once</span></div><div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  <a class="code" href="a01538.html#af3415e3476b6a4ecb873675dd10a0237">call_once</a>(_M_once, &_State_baseV2::_M_do_set, <span class="keyword">this</span>,</div><div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  <a class="code" href="a01477.html#ga1954d5552e24586051011312041033f6">std::__addressof</a>(__res), <a class="code" href="a01477.html#ga1954d5552e24586051011312041033f6">std::__addressof</a>(__did_set));</div><div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  <span class="keywordflow">if</span> (__did_set)</div><div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  <span class="comment">// Use release MO to synchronize with observers of the ready state.</span></div><div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  _M_status._M_store_notify_all(_Status::__ready,</div><div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  memory_order_release);</div><div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (!__ignore_failure)</div><div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  __throw_future_error(<span class="keywordtype">int</span>(future_errc::promise_already_satisfied));</div><div class="line"><a name="l00409"></a><span class="lineno"> 409</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>  <span class="comment">// Provide a result to the shared state but delay making it ready</span></div><div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  <span class="comment">// until the calling thread exits.</span></div><div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  <span class="comment">// Calls at most once: _M_result = __res();</span></div><div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  _M_set_delayed_result(<span class="keyword">function</span><_Ptr_type()> __res,</div><div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  weak_ptr<_State_baseV2> __self)</div><div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  {</div><div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  <span class="keywordtype">bool</span> __did_set = <span class="keyword">false</span>;</div><div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  unique_ptr<_Make_ready> __mr{<span class="keyword">new</span> _Make_ready};</div><div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  <span class="comment">// all calls to this function are serialized,</span></div><div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  <span class="comment">// side-effects of invoking __res only happen once</span></div><div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  <a class="code" href="a01538.html#af3415e3476b6a4ecb873675dd10a0237">call_once</a>(_M_once, &_State_baseV2::_M_do_set, <span class="keyword">this</span>,</div><div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  <a class="code" href="a01477.html#ga1954d5552e24586051011312041033f6">std::__addressof</a>(__res), <a class="code" href="a01477.html#ga1954d5552e24586051011312041033f6">std::__addressof</a>(__did_set));</div><div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  <span class="keywordflow">if</span> (!__did_set)</div><div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  __throw_future_error(<span class="keywordtype">int</span>(future_errc::promise_already_satisfied));</div><div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  __mr->_M_shared_state = std::move(__self);</div><div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  __mr->_M_set();</div><div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  __mr.release();</div><div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  }</div><div class="line"><a name="l00430"></a><span class="lineno"> 430</span> </div><div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  <span class="comment">// Abandon this shared state.</span></div><div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  _M_break_promise(_Ptr_type __res)</div><div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  {</div><div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  <span class="keywordflow">if</span> (static_cast<bool>(__res))</div><div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  {</div><div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  __res->_M_error =</div><div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  <a class="code" href="a01486.html#ga200c1d3152b2fd43b206da6c031b9730">make_exception_ptr</a>(future_error(future_errc::broken_promise));</div><div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  <span class="comment">// This function is only called when the last asynchronous result</span></div><div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  <span class="comment">// provider is abandoning this shared state, so noone can be</span></div><div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  <span class="comment">// trying to make the shared state ready at the same time, and</span></div><div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  <span class="comment">// we can access _M_result directly instead of through call_once.</span></div><div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  _M_result.swap(__res);</div><div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  <span class="comment">// Use release MO to synchronize with observers of the ready state.</span></div><div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  _M_status._M_store_notify_all(_Status::__ready,</div><div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  memory_order_release);</div><div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  }</div><div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  }</div><div class="line"><a name="l00449"></a><span class="lineno"> 449</span> </div><div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  <span class="comment">// Called when this object is first passed to a future.</span></div><div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  _M_set_retrieved_flag()</div><div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  {</div><div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  <span class="keywordflow">if</span> (_M_retrieved.test_and_set())</div><div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  __throw_future_error(<span class="keywordtype">int</span>(future_errc::future_already_retrieved));</div><div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  }</div><div class="line"><a name="l00457"></a><span class="lineno"> 457</span> </div><div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span> _Arg></div><div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  <span class="keyword">struct </span>_Setter;</div><div class="line"><a name="l00460"></a><span class="lineno"> 460</span> </div><div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  <span class="comment">// set lvalues</span></div><div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span> _Arg></div><div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  <span class="keyword">struct </span>_Setter<_Res, _Arg&></div><div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  {</div><div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  <span class="comment">// check this is only used by promise<R>::set_value(const R&)</span></div><div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  <span class="comment">// or promise<R&>::set_value(R&)</span></div><div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  static_assert(is_same<_Res, _Arg&>::value <span class="comment">// promise<R&></span></div><div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  || is_same<const _Res, _Arg>::value, <span class="comment">// promise<R></span></div><div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  <span class="stringliteral">"Invalid specialisation"</span>);</div><div class="line"><a name="l00470"></a><span class="lineno"> 470</span> </div><div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  <span class="comment">// Used by std::promise to copy construct the result.</span></div><div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  <span class="keyword">typename</span> promise<_Res>::_Ptr_type operator()()<span class="keyword"> const</span></div><div class="line"><a name="l00473"></a><span class="lineno"> 473</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  _M_promise->_M_storage->_M_set(*_M_arg);</div><div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  <span class="keywordflow">return</span> std::move(_M_promise->_M_storage);</div><div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  }</div><div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  promise<_Res>* _M_promise;</div><div class="line"><a name="l00478"></a><span class="lineno"> 478</span>  _Arg* _M_arg;</div><div class="line"><a name="l00479"></a><span class="lineno"> 479</span>  };</div><div class="line"><a name="l00480"></a><span class="lineno"> 480</span> </div><div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  <span class="comment">// set rvalues</span></div><div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res></div><div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  <span class="keyword">struct </span>_Setter<_Res, _Res&&></div><div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  {</div><div class="line"><a name="l00485"></a><span class="lineno"> 485</span>  <span class="comment">// Used by std::promise to move construct the result.</span></div><div class="line"><a name="l00486"></a><span class="lineno"> 486</span>  <span class="keyword">typename</span> promise<_Res>::_Ptr_type operator()()<span class="keyword"> const</span></div><div class="line"><a name="l00487"></a><span class="lineno"> 487</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00488"></a><span class="lineno"> 488</span>  _M_promise->_M_storage->_M_set(std::move(*_M_arg));</div><div class="line"><a name="l00489"></a><span class="lineno"> 489</span>  <span class="keywordflow">return</span> std::move(_M_promise->_M_storage);</div><div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  }</div><div class="line"><a name="l00491"></a><span class="lineno"> 491</span>  promise<_Res>* _M_promise;</div><div class="line"><a name="l00492"></a><span class="lineno"> 492</span>  _Res* _M_arg;</div><div class="line"><a name="l00493"></a><span class="lineno"> 493</span>  };</div><div class="line"><a name="l00494"></a><span class="lineno"> 494</span> </div><div class="line"><a name="l00495"></a><span class="lineno"> 495</span>  <span class="comment">// set void</span></div><div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res></div><div class="line"><a name="l00497"></a><span class="lineno"> 497</span>  <span class="keyword">struct </span>_Setter<_Res, void></div><div class="line"><a name="l00498"></a><span class="lineno"> 498</span>  {</div><div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  static_assert(is_void<_Res>::value, <span class="stringliteral">"Only used for promise<void>"</span>);</div><div class="line"><a name="l00500"></a><span class="lineno"> 500</span> </div><div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  <span class="keyword">typename</span> promise<_Res>::_Ptr_type operator()()<span class="keyword"> const</span></div><div class="line"><a name="l00502"></a><span class="lineno"> 502</span> <span class="keyword"> </span>{ <span class="keywordflow">return</span> std::move(_M_promise->_M_storage); }</div><div class="line"><a name="l00503"></a><span class="lineno"> 503</span> </div><div class="line"><a name="l00504"></a><span class="lineno"> 504</span>  promise<_Res>* _M_promise;</div><div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  };</div><div class="line"><a name="l00506"></a><span class="lineno"> 506</span> </div><div class="line"><a name="l00507"></a><span class="lineno"> 507</span>  <span class="keyword">struct </span>__exception_ptr_tag { };</div><div class="line"><a name="l00508"></a><span class="lineno"> 508</span> </div><div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  <span class="comment">// set exceptions</span></div><div class="line"><a name="l00510"></a><span class="lineno"> 510</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res></div><div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  <span class="keyword">struct </span>_Setter<_Res, __exception_ptr_tag></div><div class="line"><a name="l00512"></a><span class="lineno"> 512</span>  {</div><div class="line"><a name="l00513"></a><span class="lineno"> 513</span>  <span class="comment">// Used by std::promise to store an exception as the result.</span></div><div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  <span class="keyword">typename</span> promise<_Res>::_Ptr_type operator()()<span class="keyword"> const</span></div><div class="line"><a name="l00515"></a><span class="lineno"> 515</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  _M_promise->_M_storage->_M_error = *_M_ex;</div><div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  <span class="keywordflow">return</span> std::move(_M_promise->_M_storage);</div><div class="line"><a name="l00518"></a><span class="lineno"> 518</span>  }</div><div class="line"><a name="l00519"></a><span class="lineno"> 519</span> </div><div class="line"><a name="l00520"></a><span class="lineno"> 520</span>  promise<_Res>* _M_promise;</div><div class="line"><a name="l00521"></a><span class="lineno"> 521</span>  exception_ptr* _M_ex;</div><div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  };</div><div class="line"><a name="l00523"></a><span class="lineno"> 523</span> </div><div class="line"><a name="l00524"></a><span class="lineno"> 524</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span> _Arg></div><div class="line"><a name="l00525"></a><span class="lineno"> 525</span>  <span class="keyword">static</span> _Setter<_Res, _Arg&&></div><div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  __setter(promise<_Res>* __prom, _Arg&& __arg)</div><div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  {</div><div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  _S_check(__prom->_M_future);</div><div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  <span class="keywordflow">return</span> _Setter<_Res, _Arg&&>{ __prom, <a class="code" href="a01477.html#ga1954d5552e24586051011312041033f6">std::__addressof</a>(__arg) };</div><div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  }</div><div class="line"><a name="l00531"></a><span class="lineno"> 531</span> </div><div class="line"><a name="l00532"></a><span class="lineno"> 532</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res></div><div class="line"><a name="l00533"></a><span class="lineno"> 533</span>  <span class="keyword">static</span> _Setter<_Res, __exception_ptr_tag></div><div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  __setter(exception_ptr& __ex, promise<_Res>* __prom)</div><div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  {</div><div class="line"><a name="l00536"></a><span class="lineno"> 536</span>  _S_check(__prom->_M_future);</div><div class="line"><a name="l00537"></a><span class="lineno"> 537</span>  <span class="keywordflow">return</span> _Setter<_Res, __exception_ptr_tag>{ __prom, &__ex };</div><div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  }</div><div class="line"><a name="l00539"></a><span class="lineno"> 539</span> </div><div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res></div><div class="line"><a name="l00541"></a><span class="lineno"> 541</span>  <span class="keyword">static</span> _Setter<_Res, void></div><div class="line"><a name="l00542"></a><span class="lineno"> 542</span>  __setter(promise<_Res>* __prom)</div><div class="line"><a name="l00543"></a><span class="lineno"> 543</span>  {</div><div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  _S_check(__prom->_M_future);</div><div class="line"><a name="l00545"></a><span class="lineno"> 545</span>  <span class="keywordflow">return</span> _Setter<_Res, void>{ __prom };</div><div class="line"><a name="l00546"></a><span class="lineno"> 546</span>  }</div><div class="line"><a name="l00547"></a><span class="lineno"> 547</span> </div><div class="line"><a name="l00548"></a><span class="lineno"> 548</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00549"></a><span class="lineno"> 549</span>  <span class="keyword">static</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  _S_check(<span class="keyword">const</span> shared_ptr<_Tp>& __p)</div><div class="line"><a name="l00551"></a><span class="lineno"> 551</span>  {</div><div class="line"><a name="l00552"></a><span class="lineno"> 552</span>  <span class="keywordflow">if</span> (!static_cast<bool>(__p))</div><div class="line"><a name="l00553"></a><span class="lineno"> 553</span>  __throw_future_error((<span class="keywordtype">int</span>)future_errc::no_state);</div><div class="line"><a name="l00554"></a><span class="lineno"> 554</span>  }</div><div class="line"><a name="l00555"></a><span class="lineno"> 555</span> </div><div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00557"></a><span class="lineno"> 557</span>  <span class="comment">// The function invoked with std::call_once(_M_once, ...).</span></div><div class="line"><a name="l00558"></a><span class="lineno"> 558</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00559"></a><span class="lineno"> 559</span>  _M_do_set(<span class="keyword">function</span><_Ptr_type()>* __f, <span class="keywordtype">bool</span>* __did_set)</div><div class="line"><a name="l00560"></a><span class="lineno"> 560</span>  {</div><div class="line"><a name="l00561"></a><span class="lineno"> 561</span>  _Ptr_type __res = (*__f)();</div><div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  <span class="comment">// Notify the caller that we did try to set; if we do not throw an</span></div><div class="line"><a name="l00563"></a><span class="lineno"> 563</span>  <span class="comment">// exception, the caller will be aware that it did set (e.g., see</span></div><div class="line"><a name="l00564"></a><span class="lineno"> 564</span>  <span class="comment">// _M_set_result).</span></div><div class="line"><a name="l00565"></a><span class="lineno"> 565</span>  *__did_set = <span class="keyword">true</span>;</div><div class="line"><a name="l00566"></a><span class="lineno"> 566</span>  _M_result.swap(__res); <span class="comment">// nothrow</span></div><div class="line"><a name="l00567"></a><span class="lineno"> 567</span>  }</div><div class="line"><a name="l00568"></a><span class="lineno"> 568</span> </div><div class="line"><a name="l00569"></a><span class="lineno"> 569</span>  <span class="comment">// Wait for completion of async function.</span></div><div class="line"><a name="l00570"></a><span class="lineno"> 570</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span> _M_complete_async() { }</div><div class="line"><a name="l00571"></a><span class="lineno"> 571</span> </div><div class="line"><a name="l00572"></a><span class="lineno"> 572</span>  <span class="comment">// Return true if state corresponds to a deferred function.</span></div><div class="line"><a name="l00573"></a><span class="lineno"> 573</span>  <span class="keyword">virtual</span> <span class="keywordtype">bool</span> _M_is_deferred_future()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <span class="keyword">false</span>; }</div><div class="line"><a name="l00574"></a><span class="lineno"> 574</span> </div><div class="line"><a name="l00575"></a><span class="lineno"> 575</span>  <span class="keyword">struct </span>_Make_ready final : __at_thread_exit_elt</div><div class="line"><a name="l00576"></a><span class="lineno"> 576</span>  {</div><div class="line"><a name="l00577"></a><span class="lineno"> 577</span>  weak_ptr<_State_baseV2> _M_shared_state;</div><div class="line"><a name="l00578"></a><span class="lineno"> 578</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> _S_run(<span class="keywordtype">void</span>*);</div><div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  <span class="keywordtype">void</span> _M_set();</div><div class="line"><a name="l00580"></a><span class="lineno"> 580</span>  };</div><div class="line"><a name="l00581"></a><span class="lineno"> 581</span>  };</div><div class="line"><a name="l00582"></a><span class="lineno"> 582</span> </div><div class="line"><a name="l00583"></a><span class="lineno"> 583</span> <span class="preprocessor">#ifdef _GLIBCXX_ASYNC_ABI_COMPAT</span></div><div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  <span class="keyword">class </span>_State_base;</div><div class="line"><a name="l00585"></a><span class="lineno"> 585</span>  <span class="keyword">class </span>_Async_state_common;</div><div class="line"><a name="l00586"></a><span class="lineno"> 586</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00587"></a><span class="lineno"> 587</span>  <span class="keyword">using</span> _State_base = _State_baseV2;</div><div class="line"><a name="l00588"></a><span class="lineno"> 588</span>  <span class="keyword">class </span>_Async_state_commonV2;</div><div class="line"><a name="l00589"></a><span class="lineno"> 589</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00590"></a><span class="lineno"> 590</span> </div><div class="line"><a name="l00591"></a><span class="lineno"> 591</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _BoundFn,</div><div class="line"><a name="l00592"></a><span class="lineno"> 592</span>  <span class="keyword">typename</span> _Res = decltype(std::declval<_BoundFn&>()())></div><div class="line"><a name="l00593"></a><span class="lineno"> 593</span>  <span class="keyword">class </span>_Deferred_state;</div><div class="line"><a name="l00594"></a><span class="lineno"> 594</span> </div><div class="line"><a name="l00595"></a><span class="lineno"> 595</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _BoundFn,</div><div class="line"><a name="l00596"></a><span class="lineno"> 596</span>  <span class="keyword">typename</span> _Res = decltype(std::declval<_BoundFn&>()())></div><div class="line"><a name="l00597"></a><span class="lineno"> 597</span>  <span class="keyword">class </span>_Async_state_impl;</div><div class="line"><a name="l00598"></a><span class="lineno"> 598</span> </div><div class="line"><a name="l00599"></a><span class="lineno"> 599</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Signature></div><div class="line"><a name="l00600"></a><span class="lineno"> 600</span>  <span class="keyword">class </span>_Task_state_base;</div><div class="line"><a name="l00601"></a><span class="lineno"> 601</span> </div><div class="line"><a name="l00602"></a><span class="lineno"> 602</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Fn, <span class="keyword">typename</span> _Alloc, <span class="keyword">typename</span> _Signature></div><div class="line"><a name="l00603"></a><span class="lineno"> 603</span>  <span class="keyword">class </span>_Task_state;</div><div class="line"><a name="l00604"></a><span class="lineno"> 604</span> </div><div class="line"><a name="l00605"></a><span class="lineno"> 605</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _BoundFn></div><div class="line"><a name="l00606"></a><span class="lineno"> 606</span>  <span class="keyword">static</span> <a class="code" href="a06848.html">std::shared_ptr<_State_base></a></div><div class="line"><a name="l00607"></a><span class="lineno"> 607</span>  _S_make_deferred_state(_BoundFn&& __fn);</div><div class="line"><a name="l00608"></a><span class="lineno"> 608</span> </div><div class="line"><a name="l00609"></a><span class="lineno"> 609</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _BoundFn></div><div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  <span class="keyword">static</span> <a class="code" href="a06848.html">std::shared_ptr<_State_base></a></div><div class="line"><a name="l00611"></a><span class="lineno"> 611</span>  _S_make_async_state(_BoundFn&& __fn);</div><div class="line"><a name="l00612"></a><span class="lineno"> 612</span> </div><div class="line"><a name="l00613"></a><span class="lineno"> 613</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res_ptr, <span class="keyword">typename</span> _Fn,</div><div class="line"><a name="l00614"></a><span class="lineno"> 614</span>  <span class="keyword">typename</span> _Res = <span class="keyword">typename</span> _Res_ptr::element_type::result_type></div><div class="line"><a name="l00615"></a><span class="lineno"> 615</span>  <span class="keyword">struct </span>_Task_setter;</div><div class="line"><a name="l00616"></a><span class="lineno"> 616</span> </div><div class="line"><a name="l00617"></a><span class="lineno"> 617</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res_ptr, <span class="keyword">typename</span> _BoundFn></div><div class="line"><a name="l00618"></a><span class="lineno"> 618</span>  <span class="keyword">static</span> _Task_setter<_Res_ptr, _BoundFn></div><div class="line"><a name="l00619"></a><span class="lineno"> 619</span>  _S_task_setter(_Res_ptr& __ptr, _BoundFn& __call)</div><div class="line"><a name="l00620"></a><span class="lineno"> 620</span>  {</div><div class="line"><a name="l00621"></a><span class="lineno"> 621</span>  <span class="keywordflow">return</span> { <a class="code" href="a01477.html#ga1954d5552e24586051011312041033f6">std::__addressof</a>(__ptr), <a class="code" href="a01477.html#ga1954d5552e24586051011312041033f6">std::__addressof</a>(__call) };</div><div class="line"><a name="l00622"></a><span class="lineno"> 622</span>  }</div><div class="line"><a name="l00623"></a><span class="lineno"> 623</span>  };</div><div class="line"><a name="l00624"></a><span class="lineno"> 624</span> <span class="comment"></span></div><div class="line"><a name="l00625"></a><span class="lineno"> 625</span> <span class="comment"> /// Partial specialization for reference types.</span></div><div class="line"><a name="l00626"></a><span class="lineno"> 626</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Res></div><div class="line"><a name="l00627"></a><span class="lineno"><a class="line" href="a02320.html"> 627</a></span>  <span class="keyword">struct </span><a class="code" href="a02260.html">__future_base::_Result</a><_Res&> : <a class="code" href="a02252.html">__future_base::_Result_base</a></div><div class="line"><a name="l00628"></a><span class="lineno"> 628</span>  {</div><div class="line"><a name="l00629"></a><span class="lineno"> 629</span>  <span class="keyword">typedef</span> _Res& result_type;</div><div class="line"><a name="l00630"></a><span class="lineno"> 630</span> </div><div class="line"><a name="l00631"></a><span class="lineno"> 631</span>  <a class="code" href="a02260.html">_Result</a>() noexcept : _M_value_ptr() { }</div><div class="line"><a name="l00632"></a><span class="lineno"> 632</span> </div><div class="line"><a name="l00633"></a><span class="lineno"> 633</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00634"></a><span class="lineno"> 634</span>  _M_set(_Res& __res) noexcept</div><div class="line"><a name="l00635"></a><span class="lineno"> 635</span>  { _M_value_ptr = <a class="code" href="a01477.html#gafffcfc895d2cfa7c934ec045e884faec">std::addressof</a>(__res); }</div><div class="line"><a name="l00636"></a><span class="lineno"> 636</span> </div><div class="line"><a name="l00637"></a><span class="lineno"> 637</span>  _Res& _M_get() noexcept { <span class="keywordflow">return</span> *_M_value_ptr; }</div><div class="line"><a name="l00638"></a><span class="lineno"> 638</span> </div><div class="line"><a name="l00639"></a><span class="lineno"> 639</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00640"></a><span class="lineno"> 640</span>  _Res* _M_value_ptr;</div><div class="line"><a name="l00641"></a><span class="lineno"> 641</span> </div><div class="line"><a name="l00642"></a><span class="lineno"> 642</span>  <span class="keywordtype">void</span> _M_destroy() { <span class="keyword">delete</span> <span class="keyword">this</span>; }</div><div class="line"><a name="l00643"></a><span class="lineno"> 643</span>  };</div><div class="line"><a name="l00644"></a><span class="lineno"> 644</span> <span class="comment"></span></div><div class="line"><a name="l00645"></a><span class="lineno"> 645</span> <span class="comment"> /// Explicit specialization for void.</span></div><div class="line"><a name="l00646"></a><span class="lineno"> 646</span> <span class="comment"></span> <span class="keyword">template</span><></div><div class="line"><a name="l00647"></a><span class="lineno"><a class="line" href="a02324.html"> 647</a></span>  <span class="keyword">struct </span><a class="code" href="a02260.html">__future_base::_Result</a><void> : <a class="code" href="a02252.html">__future_base::_Result_base</a></div><div class="line"><a name="l00648"></a><span class="lineno"> 648</span>  {</div><div class="line"><a name="l00649"></a><span class="lineno"> 649</span>  <span class="keyword">typedef</span> <span class="keywordtype">void</span> result_type;</div><div class="line"><a name="l00650"></a><span class="lineno"> 650</span> </div><div class="line"><a name="l00651"></a><span class="lineno"> 651</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00652"></a><span class="lineno"> 652</span>  <span class="keywordtype">void</span> _M_destroy() { <span class="keyword">delete</span> <span class="keyword">this</span>; }</div><div class="line"><a name="l00653"></a><span class="lineno"> 653</span>  };</div><div class="line"><a name="l00654"></a><span class="lineno"> 654</span> </div><div class="line"><a name="l00655"></a><span class="lineno"> 655</span> <span class="preprocessor">#ifndef _GLIBCXX_ASYNC_ABI_COMPAT</span></div><div class="line"><a name="l00656"></a><span class="lineno"> 656</span> </div><div class="line"><a name="l00657"></a><span class="lineno"> 657</span>  <span class="comment">// Allow _Setter objects to be stored locally in std::function</span></div><div class="line"><a name="l00658"></a><span class="lineno"> 658</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span> _Arg></div><div class="line"><a name="l00659"></a><span class="lineno"> 659</span>  <span class="keyword">struct </span><a class="code" href="a07084.html">__is_location_invariant</a></div><div class="line"><a name="l00660"></a><span class="lineno"> 660</span>  <<a class="code" href="a02248.html">__future_base</a>::_State_base::_Setter<_Res, _Arg>></div><div class="line"><a name="l00661"></a><span class="lineno"> 661</span>  : <a class="code" href="a03040.html">true_type</a> { };</div><div class="line"><a name="l00662"></a><span class="lineno"> 662</span> </div><div class="line"><a name="l00663"></a><span class="lineno"> 663</span>  <span class="comment">// Allow _Task_setter objects to be stored locally in std::function</span></div><div class="line"><a name="l00664"></a><span class="lineno"> 664</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res_ptr, <span class="keyword">typename</span> _Fn, <span class="keyword">typename</span> _Res></div><div class="line"><a name="l00665"></a><span class="lineno"> 665</span>  <span class="keyword">struct </span><a class="code" href="a07084.html">__is_location_invariant</a></div><div class="line"><a name="l00666"></a><span class="lineno"> 666</span>  <<a class="code" href="a02248.html">__future_base</a>::_Task_setter<_Res_ptr, _Fn, _Res>></div><div class="line"><a name="l00667"></a><span class="lineno"> 667</span>  : <a class="code" href="a03040.html">true_type</a> { };</div><div class="line"><a name="l00668"></a><span class="lineno"> 668</span> <span class="comment"></span></div><div class="line"><a name="l00669"></a><span class="lineno"> 669</span> <span class="comment"> /// Common implementation for future and shared_future.</span></div><div class="line"><a name="l00670"></a><span class="lineno"> 670</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Res></div><div class="line"><a name="l00671"></a><span class="lineno"><a class="line" href="a02336.html"> 671</a></span>  <span class="keyword">class </span><a class="code" href="a02336.html">__basic_future</a> : <span class="keyword">public</span> <a class="code" href="a02248.html">__future_base</a></div><div class="line"><a name="l00672"></a><span class="lineno"> 672</span>  {</div><div class="line"><a name="l00673"></a><span class="lineno"> 673</span>  <span class="keyword">protected</span>:</div><div class="line"><a name="l00674"></a><span class="lineno"> 674</span>  <span class="keyword">typedef</span> <a class="code" href="a06848.html">shared_ptr<_State_base></a> <a class="code" href="a06848.html">__state_type</a>;</div><div class="line"><a name="l00675"></a><span class="lineno"> 675</span>  <span class="keyword">typedef</span> <a class="code" href="a02260.html">__future_base::_Result<_Res></a>& <a class="code" href="a02260.html">__result_type</a>;</div><div class="line"><a name="l00676"></a><span class="lineno"> 676</span> </div><div class="line"><a name="l00677"></a><span class="lineno"> 677</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00678"></a><span class="lineno"> 678</span>  <a class="code" href="a06848.html">__state_type</a> _M_state;</div><div class="line"><a name="l00679"></a><span class="lineno"> 679</span> </div><div class="line"><a name="l00680"></a><span class="lineno"> 680</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00681"></a><span class="lineno"> 681</span>  <span class="comment">// Disable copying.</span></div><div class="line"><a name="l00682"></a><span class="lineno"> 682</span>  <a class="code" href="a02336.html">__basic_future</a>(<span class="keyword">const</span> <a class="code" href="a02336.html">__basic_future</a>&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00683"></a><span class="lineno"> 683</span>  <a class="code" href="a02336.html">__basic_future</a>& operator=(<span class="keyword">const</span> <a class="code" href="a02336.html">__basic_future</a>&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00684"></a><span class="lineno"> 684</span> </div><div class="line"><a name="l00685"></a><span class="lineno"> 685</span>  <span class="keywordtype">bool</span></div><div class="line"><a name="l00686"></a><span class="lineno"> 686</span>  valid() <span class="keyword">const</span> noexcept { <span class="keywordflow">return</span> static_cast<bool>(_M_state); }</div><div class="line"><a name="l00687"></a><span class="lineno"> 687</span> </div><div class="line"><a name="l00688"></a><span class="lineno"> 688</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00689"></a><span class="lineno"> 689</span>  wait()<span class="keyword"> const</span></div><div class="line"><a name="l00690"></a><span class="lineno"> 690</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00691"></a><span class="lineno"> 691</span>  _State_base::_S_check(_M_state);</div><div class="line"><a name="l00692"></a><span class="lineno"> 692</span>  _M_state->wait();</div><div class="line"><a name="l00693"></a><span class="lineno"> 693</span>  }</div><div class="line"><a name="l00694"></a><span class="lineno"> 694</span> </div><div class="line"><a name="l00695"></a><span class="lineno"> 695</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Rep, <span class="keyword">typename</span> _Period></div><div class="line"><a name="l00696"></a><span class="lineno"> 696</span>  <a class="code" href="a01469.html#ga528eb8f3b350394c0406d4d58ab7dbf4">future_status</a></div><div class="line"><a name="l00697"></a><span class="lineno"> 697</span>  wait_for(<span class="keyword">const</span> <a class="code" href="a01828.html">chrono::duration<_Rep, _Period></a>& __rel)<span class="keyword"> const</span></div><div class="line"><a name="l00698"></a><span class="lineno"> 698</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00699"></a><span class="lineno"> 699</span>  _State_base::_S_check(_M_state);</div><div class="line"><a name="l00700"></a><span class="lineno"> 700</span>  <span class="keywordflow">return</span> _M_state->wait_for(__rel);</div><div class="line"><a name="l00701"></a><span class="lineno"> 701</span>  }</div><div class="line"><a name="l00702"></a><span class="lineno"> 702</span> </div><div class="line"><a name="l00703"></a><span class="lineno"> 703</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Clock, <span class="keyword">typename</span> _Duration></div><div class="line"><a name="l00704"></a><span class="lineno"> 704</span>  <a class="code" href="a01469.html#ga528eb8f3b350394c0406d4d58ab7dbf4">future_status</a></div><div class="line"><a name="l00705"></a><span class="lineno"> 705</span>  wait_until(<span class="keyword">const</span> <a class="code" href="a01832.html">chrono::time_point<_Clock, _Duration></a>& __abs)<span class="keyword"> const</span></div><div class="line"><a name="l00706"></a><span class="lineno"> 706</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00707"></a><span class="lineno"> 707</span>  _State_base::_S_check(_M_state);</div><div class="line"><a name="l00708"></a><span class="lineno"> 708</span>  <span class="keywordflow">return</span> _M_state->wait_until(__abs);</div><div class="line"><a name="l00709"></a><span class="lineno"> 709</span>  }</div><div class="line"><a name="l00710"></a><span class="lineno"> 710</span> </div><div class="line"><a name="l00711"></a><span class="lineno"> 711</span>  <span class="keyword">protected</span>:<span class="comment"></span></div><div class="line"><a name="l00712"></a><span class="lineno"> 712</span> <span class="comment"> /// Wait for the state to be ready and rethrow any stored exception</span></div><div class="line"><a name="l00713"></a><span class="lineno"> 713</span> <span class="comment"></span> <a class="code" href="a02260.html">__result_type</a></div><div class="line"><a name="l00714"></a><span class="lineno"><a class="line" href="a02336.html#a71d62e5218e561c5c4507eb3e7f70474"> 714</a></span>  <a class="code" href="a02336.html#a71d62e5218e561c5c4507eb3e7f70474">_M_get_result</a>()<span class="keyword"> const</span></div><div class="line"><a name="l00715"></a><span class="lineno"> 715</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00716"></a><span class="lineno"> 716</span>  _State_base::_S_check(_M_state);</div><div class="line"><a name="l00717"></a><span class="lineno"> 717</span>  <a class="code" href="a02252.html">_Result_base</a>& __res = _M_state->wait();</div><div class="line"><a name="l00718"></a><span class="lineno"> 718</span>  <span class="keywordflow">if</span> (!(__res._M_error == 0))</div><div class="line"><a name="l00719"></a><span class="lineno"> 719</span>  <a class="code" href="a01486.html#ga64d0b68338d7edbfd7d95f4177dbc442">rethrow_exception</a>(__res._M_error);</div><div class="line"><a name="l00720"></a><span class="lineno"> 720</span>  <span class="keywordflow">return</span> static_cast<__result_type>(__res);</div><div class="line"><a name="l00721"></a><span class="lineno"> 721</span>  }</div><div class="line"><a name="l00722"></a><span class="lineno"> 722</span> </div><div class="line"><a name="l00723"></a><span class="lineno"> 723</span>  <span class="keywordtype">void</span> _M_swap(<a class="code" href="a02336.html">__basic_future</a>& __that) noexcept</div><div class="line"><a name="l00724"></a><span class="lineno"> 724</span>  {</div><div class="line"><a name="l00725"></a><span class="lineno"> 725</span>  _M_state.swap(__that._M_state);</div><div class="line"><a name="l00726"></a><span class="lineno"> 726</span>  }</div><div class="line"><a name="l00727"></a><span class="lineno"> 727</span> </div><div class="line"><a name="l00728"></a><span class="lineno"> 728</span>  <span class="comment">// Construction of a future by promise::get_future()</span></div><div class="line"><a name="l00729"></a><span class="lineno"> 729</span>  <span class="keyword">explicit</span></div><div class="line"><a name="l00730"></a><span class="lineno"> 730</span>  __basic_future(<span class="keyword">const</span> __state_type& __state) : _M_state(__state)</div><div class="line"><a name="l00731"></a><span class="lineno"> 731</span>  {</div><div class="line"><a name="l00732"></a><span class="lineno"> 732</span>  _State_base::_S_check(_M_state);</div><div class="line"><a name="l00733"></a><span class="lineno"> 733</span>  _M_state->_M_set_retrieved_flag();</div><div class="line"><a name="l00734"></a><span class="lineno"> 734</span>  }</div><div class="line"><a name="l00735"></a><span class="lineno"> 735</span> </div><div class="line"><a name="l00736"></a><span class="lineno"> 736</span>  <span class="comment">// Copy construction from a shared_future</span></div><div class="line"><a name="l00737"></a><span class="lineno"> 737</span>  <span class="keyword">explicit</span></div><div class="line"><a name="l00738"></a><span class="lineno"> 738</span>  __basic_future(<span class="keyword">const</span> shared_future<_Res>&) noexcept;</div><div class="line"><a name="l00739"></a><span class="lineno"> 739</span> </div><div class="line"><a name="l00740"></a><span class="lineno"> 740</span>  <span class="comment">// Move construction from a shared_future</span></div><div class="line"><a name="l00741"></a><span class="lineno"> 741</span>  <span class="keyword">explicit</span></div><div class="line"><a name="l00742"></a><span class="lineno"> 742</span>  __basic_future(shared_future<_Res>&&) noexcept;</div><div class="line"><a name="l00743"></a><span class="lineno"> 743</span> </div><div class="line"><a name="l00744"></a><span class="lineno"> 744</span>  <span class="comment">// Move construction from a future</span></div><div class="line"><a name="l00745"></a><span class="lineno"> 745</span>  explicit</div><div class="line"><a name="l00746"></a><span class="lineno"> 746</span>  __basic_future(future<_Res>&&) noexcept;</div><div class="line"><a name="l00747"></a><span class="lineno"> 747</span> </div><div class="line"><a name="l00748"></a><span class="lineno"> 748</span>  constexpr __basic_future() noexcept : _M_state() { }</div><div class="line"><a name="l00749"></a><span class="lineno"> 749</span> </div><div class="line"><a name="l00750"></a><span class="lineno"> 750</span>  <span class="keyword">struct </span>_Reset</div><div class="line"><a name="l00751"></a><span class="lineno"> 751</span>  {</div><div class="line"><a name="l00752"></a><span class="lineno"> 752</span>  <span class="keyword">explicit</span> _Reset(__basic_future& __fut) noexcept : _M_fut(__fut) { }</div><div class="line"><a name="l00753"></a><span class="lineno"> 753</span>  ~_Reset() { _M_fut._M_state.reset(); }</div><div class="line"><a name="l00754"></a><span class="lineno"> 754</span>  __basic_future& _M_fut;</div><div class="line"><a name="l00755"></a><span class="lineno"> 755</span>  };</div><div class="line"><a name="l00756"></a><span class="lineno"> 756</span>  };</div><div class="line"><a name="l00757"></a><span class="lineno"> 757</span> </div><div class="line"><a name="l00758"></a><span class="lineno"> 758</span> <span class="comment"></span></div><div class="line"><a name="l00759"></a><span class="lineno"> 759</span> <span class="comment"> /// Primary template for future.</span></div><div class="line"><a name="l00760"></a><span class="lineno"> 760</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Res></div><div class="line"><a name="l00761"></a><span class="lineno"> 761</span>  <span class="keyword">class </span>future : <span class="keyword">public</span> __basic_future<_Res></div><div class="line"><a name="l00762"></a><span class="lineno"> 762</span>  {</div><div class="line"><a name="l00763"></a><span class="lineno"> 763</span>  <span class="keyword">friend</span> <span class="keyword">class </span>promise<_Res>;</div><div class="line"><a name="l00764"></a><span class="lineno"> 764</span>  <span class="keyword">template</span><<span class="keyword">typename</span>> <span class="keyword">friend</span> <span class="keyword">class </span>packaged_task;</div><div class="line"><a name="l00765"></a><span class="lineno"> 765</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Fn, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00766"></a><span class="lineno"> 766</span>  <span class="keyword">friend</span> future<__async_result_of<_Fn, _Args...>></div><div class="line"><a name="l00767"></a><span class="lineno"> 767</span>  <a class="code" href="a01469.html#gad61c88630f1705f6be0b8ba6cc832d6a">async</a>(<a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a>, _Fn&&, _Args&&...);</div><div class="line"><a name="l00768"></a><span class="lineno"> 768</span> </div><div class="line"><a name="l00769"></a><span class="lineno"> 769</span>  <span class="keyword">typedef</span> __basic_future<_Res> _Base_type;</div><div class="line"><a name="l00770"></a><span class="lineno"> 770</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> _Base_type::__state_type __state_type;</div><div class="line"><a name="l00771"></a><span class="lineno"> 771</span> </div><div class="line"><a name="l00772"></a><span class="lineno"> 772</span>  <span class="keyword">explicit</span></div><div class="line"><a name="l00773"></a><span class="lineno"> 773</span>  future(<span class="keyword">const</span> __state_type& __state) : _Base_type(__state) { }</div><div class="line"><a name="l00774"></a><span class="lineno"> 774</span> </div><div class="line"><a name="l00775"></a><span class="lineno"> 775</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00776"></a><span class="lineno"> 776</span>  constexpr future() noexcept : _Base_type() { }</div><div class="line"><a name="l00777"></a><span class="lineno"> 777</span> <span class="comment"></span></div><div class="line"><a name="l00778"></a><span class="lineno"> 778</span> <span class="comment"> /// Move constructor</span></div><div class="line"><a name="l00779"></a><span class="lineno"><a class="line" href="a02232.html#a47c11429633480bddbb965a5f79ab410"> 779</a></span> <span class="comment"></span> <a class="code" href="a02232.html#a47c11429633480bddbb965a5f79ab410">future</a>(<a class="code" href="a02232.html">future</a>&& __uf) noexcept : <a class="code" href="a02336.html">_Base_type</a>(std::move(__uf)) { }</div><div class="line"><a name="l00780"></a><span class="lineno"> 780</span> </div><div class="line"><a name="l00781"></a><span class="lineno"> 781</span>  <span class="comment">// Disable copying</span></div><div class="line"><a name="l00782"></a><span class="lineno"> 782</span>  <a class="code" href="a02232.html">future</a>(<span class="keyword">const</span> <a class="code" href="a02232.html">future</a>&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00783"></a><span class="lineno"> 783</span>  <a class="code" href="a02232.html">future</a>& operator=(<span class="keyword">const</span> <a class="code" href="a02232.html">future</a>&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00784"></a><span class="lineno"> 784</span> </div><div class="line"><a name="l00785"></a><span class="lineno"> 785</span>  <a class="code" href="a02232.html">future</a>& operator=(<a class="code" href="a02232.html">future</a>&& __fut) noexcept</div><div class="line"><a name="l00786"></a><span class="lineno"> 786</span>  {</div><div class="line"><a name="l00787"></a><span class="lineno"> 787</span>  <a class="code" href="a02232.html">future</a>(std::move(__fut))._M_swap(*<span class="keyword">this</span>);</div><div class="line"><a name="l00788"></a><span class="lineno"> 788</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00789"></a><span class="lineno"> 789</span>  }</div><div class="line"><a name="l00790"></a><span class="lineno"> 790</span> <span class="comment"></span></div><div class="line"><a name="l00791"></a><span class="lineno"> 791</span> <span class="comment"> /// Retrieving the value</span></div><div class="line"><a name="l00792"></a><span class="lineno"> 792</span> <span class="comment"></span> _Res</div><div class="line"><a name="l00793"></a><span class="lineno"><a class="line" href="a02232.html#ad340dd48cf99967cf53809024cbe9db1"> 793</a></span>  <a class="code" href="a02232.html#ad340dd48cf99967cf53809024cbe9db1">get</a>()</div><div class="line"><a name="l00794"></a><span class="lineno"> 794</span>  {</div><div class="line"><a name="l00795"></a><span class="lineno"> 795</span>  <span class="keyword">typename</span> _Base_type::_Reset __reset(*<span class="keyword">this</span>);</div><div class="line"><a name="l00796"></a><span class="lineno"> 796</span>  <span class="keywordflow">return</span> std::move(this-><a class="code" href="a02336.html#a71d62e5218e561c5c4507eb3e7f70474">_M_get_result</a>()._M_value());</div><div class="line"><a name="l00797"></a><span class="lineno"> 797</span>  }</div><div class="line"><a name="l00798"></a><span class="lineno"> 798</span> </div><div class="line"><a name="l00799"></a><span class="lineno"> 799</span>  <a class="code" href="a02236.html">shared_future<_Res></a> share() noexcept;</div><div class="line"><a name="l00800"></a><span class="lineno"> 800</span>  };</div><div class="line"><a name="l00801"></a><span class="lineno"> 801</span> <span class="comment"></span></div><div class="line"><a name="l00802"></a><span class="lineno"> 802</span> <span class="comment"> /// Partial specialization for future<R&></span></div><div class="line"><a name="l00803"></a><span class="lineno"> 803</span> <span class="comment"></span> template<typename _Res></div><div class="line"><a name="l00804"></a><span class="lineno"><a class="line" href="a02344.html"> 804</a></span>  class <a class="code" href="a02232.html">future</a><_Res&> : public <a class="code" href="a02336.html">__basic_future</a><_Res&></div><div class="line"><a name="l00805"></a><span class="lineno"> 805</span>  {</div><div class="line"><a name="l00806"></a><span class="lineno"> 806</span>  <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="a02244.html">promise</a><_Res&>;</div><div class="line"><a name="l00807"></a><span class="lineno"> 807</span>  <span class="keyword">template</span><<span class="keyword">typename</span>> <span class="keyword">friend</span> <span class="keyword">class </span>packaged_task;</div><div class="line"><a name="l00808"></a><span class="lineno"> 808</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Fn, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00809"></a><span class="lineno"> 809</span>  <span class="keyword">friend</span> <a class="code" href="a02232.html">future</a><__async_result_of<_Fn, _Args...>></div><div class="line"><a name="l00810"></a><span class="lineno"> 810</span>  <a class="code" href="a01469.html#gad61c88630f1705f6be0b8ba6cc832d6a">async</a>(<a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a>, _Fn&&, _Args&&...);</div><div class="line"><a name="l00811"></a><span class="lineno"> 811</span> </div><div class="line"><a name="l00812"></a><span class="lineno"> 812</span>  <span class="keyword">typedef</span> <a class="code" href="a02336.html">__basic_future<_Res&></a> <a class="code" href="a02336.html">_Base_type</a>;</div><div class="line"><a name="l00813"></a><span class="lineno"> 813</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="a06848.html">_Base_type::__state_type</a> <a class="code" href="a06848.html">__state_type</a>;</div><div class="line"><a name="l00814"></a><span class="lineno"> 814</span> </div><div class="line"><a name="l00815"></a><span class="lineno"> 815</span>  <span class="keyword">explicit</span></div><div class="line"><a name="l00816"></a><span class="lineno"> 816</span>  <a class="code" href="a02232.html">future</a>(<span class="keyword">const</span> <a class="code" href="a06848.html">__state_type</a>& __state) : <a class="code" href="a02336.html">_Base_type</a>(__state) { }</div><div class="line"><a name="l00817"></a><span class="lineno"> 817</span> </div><div class="line"><a name="l00818"></a><span class="lineno"> 818</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00819"></a><span class="lineno"> 819</span>  constexpr <a class="code" href="a02232.html">future</a>() noexcept : <a class="code" href="a02336.html">_Base_type</a>() { }</div><div class="line"><a name="l00820"></a><span class="lineno"> 820</span> <span class="comment"></span></div><div class="line"><a name="l00821"></a><span class="lineno"> 821</span> <span class="comment"> /// Move constructor</span></div><div class="line"><a name="l00822"></a><span class="lineno"><a class="line" href="a02344.html#a290550ce931d18ccad7d296e4875ddb3"> 822</a></span> <span class="comment"></span> <a class="code" href="a02344.html#a290550ce931d18ccad7d296e4875ddb3">future</a>(<a class="code" href="a02232.html">future</a>&& __uf) noexcept : <a class="code" href="a02336.html">_Base_type</a>(std::move(__uf)) { }</div><div class="line"><a name="l00823"></a><span class="lineno"> 823</span> </div><div class="line"><a name="l00824"></a><span class="lineno"> 824</span>  <span class="comment">// Disable copying</span></div><div class="line"><a name="l00825"></a><span class="lineno"> 825</span>  <a class="code" href="a02232.html">future</a>(<span class="keyword">const</span> <a class="code" href="a02232.html">future</a>&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00826"></a><span class="lineno"> 826</span>  <a class="code" href="a02232.html">future</a>& operator=(<span class="keyword">const</span> <a class="code" href="a02232.html">future</a>&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00827"></a><span class="lineno"> 827</span> </div><div class="line"><a name="l00828"></a><span class="lineno"> 828</span>  <a class="code" href="a02232.html">future</a>& operator=(<a class="code" href="a02232.html">future</a>&& __fut) noexcept</div><div class="line"><a name="l00829"></a><span class="lineno"> 829</span>  {</div><div class="line"><a name="l00830"></a><span class="lineno"> 830</span>  <a class="code" href="a02232.html">future</a>(std::move(__fut))._M_swap(*<span class="keyword">this</span>);</div><div class="line"><a name="l00831"></a><span class="lineno"> 831</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00832"></a><span class="lineno"> 832</span>  }</div><div class="line"><a name="l00833"></a><span class="lineno"> 833</span> <span class="comment"></span></div><div class="line"><a name="l00834"></a><span class="lineno"> 834</span> <span class="comment"> /// Retrieving the value</span></div><div class="line"><a name="l00835"></a><span class="lineno"> 835</span> <span class="comment"></span> _Res&</div><div class="line"><a name="l00836"></a><span class="lineno"><a class="line" href="a02344.html#a02dd6ce87e29a3baadfc1061430df774"> 836</a></span>  <a class="code" href="a02344.html#a02dd6ce87e29a3baadfc1061430df774">get</a>()</div><div class="line"><a name="l00837"></a><span class="lineno"> 837</span>  {</div><div class="line"><a name="l00838"></a><span class="lineno"> 838</span>  <span class="keyword">typename</span> _Base_type::_Reset __reset(*<span class="keyword">this</span>);</div><div class="line"><a name="l00839"></a><span class="lineno"> 839</span>  <span class="keywordflow">return</span> this-><a class="code" href="a02336.html#a71d62e5218e561c5c4507eb3e7f70474">_M_get_result</a>()._M_get();</div><div class="line"><a name="l00840"></a><span class="lineno"> 840</span>  }</div><div class="line"><a name="l00841"></a><span class="lineno"> 841</span> </div><div class="line"><a name="l00842"></a><span class="lineno"> 842</span>  <a class="code" href="a02352.html">shared_future<_Res&></a> share() noexcept;</div><div class="line"><a name="l00843"></a><span class="lineno"> 843</span>  };</div><div class="line"><a name="l00844"></a><span class="lineno"> 844</span> <span class="comment"></span></div><div class="line"><a name="l00845"></a><span class="lineno"> 845</span> <span class="comment"> /// Explicit specialization for future<void></span></div><div class="line"><a name="l00846"></a><span class="lineno"> 846</span> <span class="comment"></span> template<></div><div class="line"><a name="l00847"></a><span class="lineno"><a class="line" href="a02348.html"> 847</a></span>  class <a class="code" href="a02232.html">future</a><<span class="keywordtype">void</span>> : public <a class="code" href="a02336.html">__basic_future</a><<span class="keywordtype">void</span>></div><div class="line"><a name="l00848"></a><span class="lineno"> 848</span>  {</div><div class="line"><a name="l00849"></a><span class="lineno"> 849</span>  <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="a02244.html">promise</a><void>;</div><div class="line"><a name="l00850"></a><span class="lineno"> 850</span>  <span class="keyword">template</span><<span class="keyword">typename</span>> <span class="keyword">friend</span> <span class="keyword">class </span>packaged_task;</div><div class="line"><a name="l00851"></a><span class="lineno"> 851</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Fn, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00852"></a><span class="lineno"> 852</span>  <span class="keyword">friend</span> <a class="code" href="a02232.html">future</a><__async_result_of<_Fn, _Args...>></div><div class="line"><a name="l00853"></a><span class="lineno"> 853</span>  <a class="code" href="a01469.html#gad61c88630f1705f6be0b8ba6cc832d6a">async</a>(<a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a>, _Fn&&, _Args&&...);</div><div class="line"><a name="l00854"></a><span class="lineno"> 854</span> </div><div class="line"><a name="l00855"></a><span class="lineno"> 855</span>  <span class="keyword">typedef</span> <a class="code" href="a02336.html">__basic_future<void></a> <a class="code" href="a02336.html">_Base_type</a>;</div><div class="line"><a name="l00856"></a><span class="lineno"> 856</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="a06848.html">_Base_type::__state_type</a> <a class="code" href="a06848.html">__state_type</a>;</div><div class="line"><a name="l00857"></a><span class="lineno"> 857</span> </div><div class="line"><a name="l00858"></a><span class="lineno"> 858</span>  <span class="keyword">explicit</span></div><div class="line"><a name="l00859"></a><span class="lineno"> 859</span>  <a class="code" href="a02232.html">future</a>(<span class="keyword">const</span> <a class="code" href="a06848.html">__state_type</a>& __state) : <a class="code" href="a02336.html">_Base_type</a>(__state) { }</div><div class="line"><a name="l00860"></a><span class="lineno"> 860</span> </div><div class="line"><a name="l00861"></a><span class="lineno"> 861</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00862"></a><span class="lineno"> 862</span>  constexpr <a class="code" href="a02232.html">future</a>() noexcept : <a class="code" href="a02336.html">_Base_type</a>() { }</div><div class="line"><a name="l00863"></a><span class="lineno"> 863</span> <span class="comment"></span></div><div class="line"><a name="l00864"></a><span class="lineno"> 864</span> <span class="comment"> /// Move constructor</span></div><div class="line"><a name="l00865"></a><span class="lineno"><a class="line" href="a02348.html#a8d804ed9d3fb0818d7d4af8197cc00a7"> 865</a></span> <span class="comment"></span> <a class="code" href="a02348.html#a8d804ed9d3fb0818d7d4af8197cc00a7">future</a>(<a class="code" href="a02232.html">future</a>&& __uf) noexcept : <a class="code" href="a02336.html">_Base_type</a>(std::move(__uf)) { }</div><div class="line"><a name="l00866"></a><span class="lineno"> 866</span> </div><div class="line"><a name="l00867"></a><span class="lineno"> 867</span>  <span class="comment">// Disable copying</span></div><div class="line"><a name="l00868"></a><span class="lineno"> 868</span>  <a class="code" href="a02232.html">future</a>(<span class="keyword">const</span> <a class="code" href="a02232.html">future</a>&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00869"></a><span class="lineno"> 869</span>  <a class="code" href="a02232.html">future</a>& operator=(<span class="keyword">const</span> <a class="code" href="a02232.html">future</a>&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00870"></a><span class="lineno"> 870</span> </div><div class="line"><a name="l00871"></a><span class="lineno"> 871</span>  <a class="code" href="a02232.html">future</a>& operator=(<a class="code" href="a02232.html">future</a>&& __fut) noexcept</div><div class="line"><a name="l00872"></a><span class="lineno"> 872</span>  {</div><div class="line"><a name="l00873"></a><span class="lineno"> 873</span>  <a class="code" href="a02232.html">future</a>(std::move(__fut))._M_swap(*<span class="keyword">this</span>);</div><div class="line"><a name="l00874"></a><span class="lineno"> 874</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00875"></a><span class="lineno"> 875</span>  }</div><div class="line"><a name="l00876"></a><span class="lineno"> 876</span> <span class="comment"></span></div><div class="line"><a name="l00877"></a><span class="lineno"> 877</span> <span class="comment"> /// Retrieving the value</span></div><div class="line"><a name="l00878"></a><span class="lineno"> 878</span> <span class="comment"></span> <span class="keywordtype">void</span></div><div class="line"><a name="l00879"></a><span class="lineno"><a class="line" href="a02348.html#a22b2cb90803ba2cae78dafa81ba278d6"> 879</a></span>  <a class="code" href="a02348.html#a22b2cb90803ba2cae78dafa81ba278d6">get</a>()</div><div class="line"><a name="l00880"></a><span class="lineno"> 880</span>  {</div><div class="line"><a name="l00881"></a><span class="lineno"> 881</span>  <span class="keyword">typename</span> _Base_type::_Reset __reset(*<span class="keyword">this</span>);</div><div class="line"><a name="l00882"></a><span class="lineno"> 882</span>  this-><a class="code" href="a02336.html#a71d62e5218e561c5c4507eb3e7f70474">_M_get_result</a>();</div><div class="line"><a name="l00883"></a><span class="lineno"> 883</span>  }</div><div class="line"><a name="l00884"></a><span class="lineno"> 884</span> </div><div class="line"><a name="l00885"></a><span class="lineno"> 885</span>  <a class="code" href="a02356.html">shared_future<void></a> share() noexcept;</div><div class="line"><a name="l00886"></a><span class="lineno"> 886</span>  };</div><div class="line"><a name="l00887"></a><span class="lineno"> 887</span> </div><div class="line"><a name="l00888"></a><span class="lineno"> 888</span> <span class="comment"></span></div><div class="line"><a name="l00889"></a><span class="lineno"> 889</span> <span class="comment"> /// Primary template for shared_future.</span></div><div class="line"><a name="l00890"></a><span class="lineno"> 890</span> <span class="comment"></span> template<typename _Res></div><div class="line"><a name="l00891"></a><span class="lineno"> 891</span>  class <a class="code" href="a02236.html">shared_future</a> : public <a class="code" href="a02336.html">__basic_future</a><_Res></div><div class="line"><a name="l00892"></a><span class="lineno"> 892</span>  {</div><div class="line"><a name="l00893"></a><span class="lineno"> 893</span>  <span class="keyword">typedef</span> <a class="code" href="a02336.html">__basic_future<_Res></a> _Base_type;</div><div class="line"><a name="l00894"></a><span class="lineno"> 894</span> </div><div class="line"><a name="l00895"></a><span class="lineno"> 895</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00896"></a><span class="lineno"> 896</span>  constexpr <a class="code" href="a02236.html">shared_future</a>() noexcept : _Base_type() { }</div><div class="line"><a name="l00897"></a><span class="lineno"> 897</span> <span class="comment"></span></div><div class="line"><a name="l00898"></a><span class="lineno"> 898</span> <span class="comment"> /// Copy constructor</span></div><div class="line"><a name="l00899"></a><span class="lineno"><a class="line" href="a02236.html#a7abac9b976a7f293a80951ddc77c61a9"> 899</a></span> <span class="comment"></span> <a class="code" href="a02236.html#a7abac9b976a7f293a80951ddc77c61a9">shared_future</a>(<span class="keyword">const</span> <a class="code" href="a02236.html">shared_future</a>& __sf) noexcept : <a class="code" href="a02336.html">_Base_type</a>(__sf) { }</div><div class="line"><a name="l00900"></a><span class="lineno"> 900</span> <span class="comment"></span></div><div class="line"><a name="l00901"></a><span class="lineno"> 901</span> <span class="comment"> /// Construct from a future rvalue</span></div><div class="line"><a name="l00902"></a><span class="lineno"><a class="line" href="a02236.html#aa1f48e4ac60e93f1eccaf5c4992e5af9"> 902</a></span> <span class="comment"></span> <a class="code" href="a02236.html#aa1f48e4ac60e93f1eccaf5c4992e5af9">shared_future</a>(<a class="code" href="a02232.html">future<_Res></a>&& __uf) noexcept</div><div class="line"><a name="l00903"></a><span class="lineno"> 903</span>  : <a class="code" href="a02336.html">_Base_type</a>(std::move(__uf))</div><div class="line"><a name="l00904"></a><span class="lineno"> 904</span>  { }</div><div class="line"><a name="l00905"></a><span class="lineno"> 905</span> <span class="comment"></span></div><div class="line"><a name="l00906"></a><span class="lineno"> 906</span> <span class="comment"> /// Construct from a shared_future rvalue</span></div><div class="line"><a name="l00907"></a><span class="lineno"><a class="line" href="a02236.html#a39eb67ba5bfeda967888f6f8fafd0de8"> 907</a></span> <span class="comment"></span> <a class="code" href="a02236.html#a39eb67ba5bfeda967888f6f8fafd0de8">shared_future</a>(<a class="code" href="a02236.html">shared_future</a>&& __sf) noexcept</div><div class="line"><a name="l00908"></a><span class="lineno"> 908</span>  : <a class="code" href="a02336.html">_Base_type</a>(std::move(__sf))</div><div class="line"><a name="l00909"></a><span class="lineno"> 909</span>  { }</div><div class="line"><a name="l00910"></a><span class="lineno"> 910</span> </div><div class="line"><a name="l00911"></a><span class="lineno"> 911</span>  <a class="code" href="a02236.html">shared_future</a>& operator=(<span class="keyword">const</span> <a class="code" href="a02236.html">shared_future</a>& __sf) noexcept</div><div class="line"><a name="l00912"></a><span class="lineno"> 912</span>  {</div><div class="line"><a name="l00913"></a><span class="lineno"> 913</span>  <a class="code" href="a02236.html">shared_future</a>(__sf)._M_swap(*<span class="keyword">this</span>);</div><div class="line"><a name="l00914"></a><span class="lineno"> 914</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00915"></a><span class="lineno"> 915</span>  }</div><div class="line"><a name="l00916"></a><span class="lineno"> 916</span> </div><div class="line"><a name="l00917"></a><span class="lineno"> 917</span>  shared_future& operator=(shared_future&& __sf) noexcept</div><div class="line"><a name="l00918"></a><span class="lineno"> 918</span>  {</div><div class="line"><a name="l00919"></a><span class="lineno"> 919</span>  shared_future(std::move(__sf))._M_swap(*<span class="keyword">this</span>);</div><div class="line"><a name="l00920"></a><span class="lineno"> 920</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00921"></a><span class="lineno"> 921</span>  }</div><div class="line"><a name="l00922"></a><span class="lineno"> 922</span> <span class="comment"></span></div><div class="line"><a name="l00923"></a><span class="lineno"> 923</span> <span class="comment"> /// Retrieving the value</span></div><div class="line"><a name="l00924"></a><span class="lineno"> 924</span> <span class="comment"></span> <span class="keyword">const</span> _Res&</div><div class="line"><a name="l00925"></a><span class="lineno"><a class="line" href="a02236.html#a5684fd5dd1daebc3b81737fbc6d60390"> 925</a></span>  <a class="code" href="a02236.html#a5684fd5dd1daebc3b81737fbc6d60390">get</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> this-><a class="code" href="a02336.html#a71d62e5218e561c5c4507eb3e7f70474">_M_get_result</a>()._M_value(); }</div><div class="line"><a name="l00926"></a><span class="lineno"> 926</span>  };</div><div class="line"><a name="l00927"></a><span class="lineno"> 927</span> <span class="comment"></span></div><div class="line"><a name="l00928"></a><span class="lineno"> 928</span> <span class="comment"> /// Partial specialization for shared_future<R&></span></div><div class="line"><a name="l00929"></a><span class="lineno"> 929</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Res></div><div class="line"><a name="l00930"></a><span class="lineno"><a class="line" href="a02352.html"> 930</a></span>  <span class="keyword">class </span><a class="code" href="a02236.html">shared_future</a><_Res&> : <span class="keyword">public</span> <a class="code" href="a02336.html">__basic_future<_Res&></a></div><div class="line"><a name="l00931"></a><span class="lineno"> 931</span>  {</div><div class="line"><a name="l00932"></a><span class="lineno"> 932</span>  <span class="keyword">typedef</span> <a class="code" href="a02336.html">__basic_future<_Res&></a> <a class="code" href="a02336.html">_Base_type</a>;</div><div class="line"><a name="l00933"></a><span class="lineno"> 933</span> </div><div class="line"><a name="l00934"></a><span class="lineno"> 934</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00935"></a><span class="lineno"> 935</span>  constexpr <a class="code" href="a02236.html">shared_future</a>() noexcept : <a class="code" href="a02336.html">_Base_type</a>() { }</div><div class="line"><a name="l00936"></a><span class="lineno"> 936</span> <span class="comment"></span></div><div class="line"><a name="l00937"></a><span class="lineno"> 937</span> <span class="comment"> /// Copy constructor</span></div><div class="line"><a name="l00938"></a><span class="lineno"><a class="line" href="a02352.html#abf5c5217a5d88d363cf2b0c09b44b4a0"> 938</a></span> <span class="comment"></span> <a class="code" href="a02352.html#abf5c5217a5d88d363cf2b0c09b44b4a0">shared_future</a>(<span class="keyword">const</span> <a class="code" href="a02236.html">shared_future</a>& __sf) : <a class="code" href="a02336.html">_Base_type</a>(__sf) { }</div><div class="line"><a name="l00939"></a><span class="lineno"> 939</span> <span class="comment"></span></div><div class="line"><a name="l00940"></a><span class="lineno"> 940</span> <span class="comment"> /// Construct from a future rvalue</span></div><div class="line"><a name="l00941"></a><span class="lineno"><a class="line" href="a02352.html#a6326dd904d9cfb96a6505ade6e9d02dc"> 941</a></span> <span class="comment"></span> <a class="code" href="a02352.html#a6326dd904d9cfb96a6505ade6e9d02dc">shared_future</a>(<a class="code" href="a02344.html">future<_Res&></a>&& __uf) noexcept</div><div class="line"><a name="l00942"></a><span class="lineno"> 942</span>  : <a class="code" href="a02336.html">_Base_type</a>(std::move(__uf))</div><div class="line"><a name="l00943"></a><span class="lineno"> 943</span>  { }</div><div class="line"><a name="l00944"></a><span class="lineno"> 944</span> <span class="comment"></span></div><div class="line"><a name="l00945"></a><span class="lineno"> 945</span> <span class="comment"> /// Construct from a shared_future rvalue</span></div><div class="line"><a name="l00946"></a><span class="lineno"><a class="line" href="a02352.html#ae6d05bb66171df7a69ccbcf3d0a14059"> 946</a></span> <span class="comment"></span> <a class="code" href="a02352.html#ae6d05bb66171df7a69ccbcf3d0a14059">shared_future</a>(<a class="code" href="a02236.html">shared_future</a>&& __sf) noexcept</div><div class="line"><a name="l00947"></a><span class="lineno"> 947</span>  : <a class="code" href="a02336.html">_Base_type</a>(std::move(__sf))</div><div class="line"><a name="l00948"></a><span class="lineno"> 948</span>  { }</div><div class="line"><a name="l00949"></a><span class="lineno"> 949</span> </div><div class="line"><a name="l00950"></a><span class="lineno"> 950</span>  <a class="code" href="a02236.html">shared_future</a>& operator=(<span class="keyword">const</span> <a class="code" href="a02236.html">shared_future</a>& __sf)</div><div class="line"><a name="l00951"></a><span class="lineno"> 951</span>  {</div><div class="line"><a name="l00952"></a><span class="lineno"> 952</span>  <a class="code" href="a02236.html">shared_future</a>(__sf)._M_swap(*<span class="keyword">this</span>);</div><div class="line"><a name="l00953"></a><span class="lineno"> 953</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00954"></a><span class="lineno"> 954</span>  }</div><div class="line"><a name="l00955"></a><span class="lineno"> 955</span> </div><div class="line"><a name="l00956"></a><span class="lineno"> 956</span>  shared_future& operator=(shared_future&& __sf) noexcept</div><div class="line"><a name="l00957"></a><span class="lineno"> 957</span>  {</div><div class="line"><a name="l00958"></a><span class="lineno"> 958</span>  shared_future(std::move(__sf))._M_swap(*<span class="keyword">this</span>);</div><div class="line"><a name="l00959"></a><span class="lineno"> 959</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00960"></a><span class="lineno"> 960</span>  }</div><div class="line"><a name="l00961"></a><span class="lineno"> 961</span> <span class="comment"></span></div><div class="line"><a name="l00962"></a><span class="lineno"> 962</span> <span class="comment"> /// Retrieving the value</span></div><div class="line"><a name="l00963"></a><span class="lineno"> 963</span> <span class="comment"></span> _Res&</div><div class="line"><a name="l00964"></a><span class="lineno"><a class="line" href="a02352.html#a07561897cc476a3a01878bd17cf1eb75"> 964</a></span>  <a class="code" href="a02352.html#a07561897cc476a3a01878bd17cf1eb75">get</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> this-><a class="code" href="a02336.html#a71d62e5218e561c5c4507eb3e7f70474">_M_get_result</a>()._M_get(); }</div><div class="line"><a name="l00965"></a><span class="lineno"> 965</span>  };</div><div class="line"><a name="l00966"></a><span class="lineno"> 966</span> <span class="comment"></span></div><div class="line"><a name="l00967"></a><span class="lineno"> 967</span> <span class="comment"> /// Explicit specialization for shared_future<void></span></div><div class="line"><a name="l00968"></a><span class="lineno"> 968</span> <span class="comment"></span> <span class="keyword">template</span><></div><div class="line"><a name="l00969"></a><span class="lineno"><a class="line" href="a02356.html"> 969</a></span>  <span class="keyword">class </span><a class="code" href="a02236.html">shared_future</a><void> : <span class="keyword">public</span> <a class="code" href="a02336.html">__basic_future</a><void></div><div class="line"><a name="l00970"></a><span class="lineno"> 970</span>  {</div><div class="line"><a name="l00971"></a><span class="lineno"> 971</span>  <span class="keyword">typedef</span> <a class="code" href="a02336.html">__basic_future<void></a> <a class="code" href="a02336.html">_Base_type</a>;</div><div class="line"><a name="l00972"></a><span class="lineno"> 972</span> </div><div class="line"><a name="l00973"></a><span class="lineno"> 973</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00974"></a><span class="lineno"> 974</span>  constexpr <a class="code" href="a02236.html">shared_future</a>() noexcept : <a class="code" href="a02336.html">_Base_type</a>() { }</div><div class="line"><a name="l00975"></a><span class="lineno"> 975</span> <span class="comment"></span></div><div class="line"><a name="l00976"></a><span class="lineno"> 976</span> <span class="comment"> /// Copy constructor</span></div><div class="line"><a name="l00977"></a><span class="lineno"><a class="line" href="a02356.html#ad638460091d07d1688a8fdb974acacc5"> 977</a></span> <span class="comment"></span> <a class="code" href="a02356.html#ad638460091d07d1688a8fdb974acacc5">shared_future</a>(<span class="keyword">const</span> <a class="code" href="a02236.html">shared_future</a>& __sf) : <a class="code" href="a02336.html">_Base_type</a>(__sf) { }</div><div class="line"><a name="l00978"></a><span class="lineno"> 978</span> <span class="comment"></span></div><div class="line"><a name="l00979"></a><span class="lineno"> 979</span> <span class="comment"> /// Construct from a future rvalue</span></div><div class="line"><a name="l00980"></a><span class="lineno"><a class="line" href="a02356.html#a98919d50a2faca6306005a458236176f"> 980</a></span> <span class="comment"></span> <a class="code" href="a02356.html#a98919d50a2faca6306005a458236176f">shared_future</a>(<a class="code" href="a02348.html">future<void></a>&& __uf) noexcept</div><div class="line"><a name="l00981"></a><span class="lineno"> 981</span>  : <a class="code" href="a02336.html">_Base_type</a>(std::move(__uf))</div><div class="line"><a name="l00982"></a><span class="lineno"> 982</span>  { }</div><div class="line"><a name="l00983"></a><span class="lineno"> 983</span> <span class="comment"></span></div><div class="line"><a name="l00984"></a><span class="lineno"> 984</span> <span class="comment"> /// Construct from a shared_future rvalue</span></div><div class="line"><a name="l00985"></a><span class="lineno"><a class="line" href="a02356.html#ad2689035011932d007e07c10e1e48d47"> 985</a></span> <span class="comment"></span> <a class="code" href="a02356.html#ad2689035011932d007e07c10e1e48d47">shared_future</a>(<a class="code" href="a02236.html">shared_future</a>&& __sf) noexcept</div><div class="line"><a name="l00986"></a><span class="lineno"> 986</span>  : <a class="code" href="a02336.html">_Base_type</a>(std::move(__sf))</div><div class="line"><a name="l00987"></a><span class="lineno"> 987</span>  { }</div><div class="line"><a name="l00988"></a><span class="lineno"> 988</span> </div><div class="line"><a name="l00989"></a><span class="lineno"> 989</span>  <a class="code" href="a02236.html">shared_future</a>& operator=(<span class="keyword">const</span> <a class="code" href="a02236.html">shared_future</a>& __sf)</div><div class="line"><a name="l00990"></a><span class="lineno"> 990</span>  {</div><div class="line"><a name="l00991"></a><span class="lineno"> 991</span>  <a class="code" href="a02236.html">shared_future</a>(__sf)._M_swap(*<span class="keyword">this</span>);</div><div class="line"><a name="l00992"></a><span class="lineno"> 992</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00993"></a><span class="lineno"> 993</span>  }</div><div class="line"><a name="l00994"></a><span class="lineno"> 994</span> </div><div class="line"><a name="l00995"></a><span class="lineno"> 995</span>  shared_future& operator=(shared_future&& __sf) noexcept</div><div class="line"><a name="l00996"></a><span class="lineno"> 996</span>  {</div><div class="line"><a name="l00997"></a><span class="lineno"> 997</span>  shared_future(std::move(__sf))._M_swap(*<span class="keyword">this</span>);</div><div class="line"><a name="l00998"></a><span class="lineno"> 998</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00999"></a><span class="lineno"> 999</span>  }</div><div class="line"><a name="l01000"></a><span class="lineno"> 1000</span> </div><div class="line"><a name="l01001"></a><span class="lineno"> 1001</span>  <span class="comment">// Retrieving the value</span></div><div class="line"><a name="l01002"></a><span class="lineno"> 1002</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01003"></a><span class="lineno"> 1003</span>  <a class="code" href="a02232.html#ad340dd48cf99967cf53809024cbe9db1">get</a>()<span class="keyword"> const </span>{ this-><a class="code" href="a02336.html#a71d62e5218e561c5c4507eb3e7f70474">_M_get_result</a>(); }</div><div class="line"><a name="l01004"></a><span class="lineno"> 1004</span>  };</div><div class="line"><a name="l01005"></a><span class="lineno"> 1005</span> </div><div class="line"><a name="l01006"></a><span class="lineno"> 1006</span>  <span class="comment">// Now we can define the protected __basic_future constructors.</span></div><div class="line"><a name="l01007"></a><span class="lineno"> 1007</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res></div><div class="line"><a name="l01008"></a><span class="lineno"> 1008</span>  <span class="keyword">inline</span> __basic_future<_Res>::</div><div class="line"><a name="l01009"></a><span class="lineno"> 1009</span>  __basic_future(<span class="keyword">const</span> shared_future<_Res>& __sf) noexcept</div><div class="line"><a name="l01010"></a><span class="lineno"> 1010</span>  : _M_state(__sf._M_state)</div><div class="line"><a name="l01011"></a><span class="lineno"> 1011</span>  { }</div><div class="line"><a name="l01012"></a><span class="lineno"> 1012</span> </div><div class="line"><a name="l01013"></a><span class="lineno"> 1013</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res></div><div class="line"><a name="l01014"></a><span class="lineno"> 1014</span>  <span class="keyword">inline</span> __basic_future<_Res>::</div><div class="line"><a name="l01015"></a><span class="lineno"> 1015</span>  __basic_future(shared_future<_Res>&& __sf) noexcept</div><div class="line"><a name="l01016"></a><span class="lineno"> 1016</span>  : _M_state(std::move(__sf._M_state))</div><div class="line"><a name="l01017"></a><span class="lineno"> 1017</span>  { }</div><div class="line"><a name="l01018"></a><span class="lineno"> 1018</span> </div><div class="line"><a name="l01019"></a><span class="lineno"> 1019</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res></div><div class="line"><a name="l01020"></a><span class="lineno"> 1020</span>  <span class="keyword">inline</span> __basic_future<_Res>::</div><div class="line"><a name="l01021"></a><span class="lineno"> 1021</span>  __basic_future(future<_Res>&& __uf) noexcept</div><div class="line"><a name="l01022"></a><span class="lineno"> 1022</span>  : _M_state(std::move(__uf._M_state))</div><div class="line"><a name="l01023"></a><span class="lineno"> 1023</span>  { }</div><div class="line"><a name="l01024"></a><span class="lineno"> 1024</span> </div><div class="line"><a name="l01025"></a><span class="lineno"> 1025</span>  <span class="comment">// _GLIBCXX_RESOLVE_LIB_DEFECTS</span></div><div class="line"><a name="l01026"></a><span class="lineno"> 1026</span>  <span class="comment">// 2556. Wide contract for future::share()</span></div><div class="line"><a name="l01027"></a><span class="lineno"> 1027</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res></div><div class="line"><a name="l01028"></a><span class="lineno"> 1028</span>  <span class="keyword">inline</span> shared_future<_Res></div><div class="line"><a name="l01029"></a><span class="lineno"> 1029</span>  future<_Res>::share() noexcept</div><div class="line"><a name="l01030"></a><span class="lineno"> 1030</span>  { <span class="keywordflow">return</span> shared_future<_Res>(std::move(*<span class="keyword">this</span>)); }</div><div class="line"><a name="l01031"></a><span class="lineno"> 1031</span> </div><div class="line"><a name="l01032"></a><span class="lineno"> 1032</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res></div><div class="line"><a name="l01033"></a><span class="lineno"> 1033</span>  <span class="keyword">inline</span> shared_future<_Res&></div><div class="line"><a name="l01034"></a><span class="lineno"> 1034</span>  future<_Res&>::share() noexcept</div><div class="line"><a name="l01035"></a><span class="lineno"> 1035</span>  { <span class="keywordflow">return</span> shared_future<_Res&>(std::move(*<span class="keyword">this</span>)); }</div><div class="line"><a name="l01036"></a><span class="lineno"> 1036</span> </div><div class="line"><a name="l01037"></a><span class="lineno"> 1037</span>  <span class="keyword">inline</span> shared_future<void></div><div class="line"><a name="l01038"></a><span class="lineno"> 1038</span>  future<void>::share() noexcept</div><div class="line"><a name="l01039"></a><span class="lineno"> 1039</span>  { <span class="keywordflow">return</span> shared_future<void>(std::move(*<span class="keyword">this</span>)); }</div><div class="line"><a name="l01040"></a><span class="lineno"> 1040</span> <span class="comment"></span></div><div class="line"><a name="l01041"></a><span class="lineno"> 1041</span> <span class="comment"> /// Primary template for promise</span></div><div class="line"><a name="l01042"></a><span class="lineno"> 1042</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Res></div><div class="line"><a name="l01043"></a><span class="lineno"> 1043</span>  <span class="keyword">class </span>promise</div><div class="line"><a name="l01044"></a><span class="lineno"> 1044</span>  {</div><div class="line"><a name="l01045"></a><span class="lineno"> 1045</span>  <span class="keyword">typedef</span> __future_base::_State_base _State;</div><div class="line"><a name="l01046"></a><span class="lineno"> 1046</span>  <span class="keyword">typedef</span> __future_base::_Result<_Res> _Res_type;</div><div class="line"><a name="l01047"></a><span class="lineno"> 1047</span>  <span class="keyword">typedef</span> __future_base::_Ptr<_Res_type> _Ptr_type;</div><div class="line"><a name="l01048"></a><span class="lineno"> 1048</span>  <span class="keyword">template</span><<span class="keyword">typename</span>, <span class="keyword">typename</span>> <span class="keyword">friend</span> <span class="keyword">class </span>_State::_Setter;</div><div class="line"><a name="l01049"></a><span class="lineno"> 1049</span>  <span class="keyword">friend</span> _State;</div><div class="line"><a name="l01050"></a><span class="lineno"> 1050</span> </div><div class="line"><a name="l01051"></a><span class="lineno"> 1051</span>  shared_ptr<_State> _M_future;</div><div class="line"><a name="l01052"></a><span class="lineno"> 1052</span>  _Ptr_type _M_storage;</div><div class="line"><a name="l01053"></a><span class="lineno"> 1053</span> </div><div class="line"><a name="l01054"></a><span class="lineno"> 1054</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l01055"></a><span class="lineno"> 1055</span>  promise()</div><div class="line"><a name="l01056"></a><span class="lineno"> 1056</span>  : _M_future(<a class="code" href="a01538.html">std</a>::<a class="code" href="a01472.html#ga1f3ad1c876ee5b203367e06d74fe0bf2">make_shared</a><_State>()),</div><div class="line"><a name="l01057"></a><span class="lineno"> 1057</span>  _M_storage(new _Res_type())</div><div class="line"><a name="l01058"></a><span class="lineno"> 1058</span>  { }</div><div class="line"><a name="l01059"></a><span class="lineno"> 1059</span> </div><div class="line"><a name="l01060"></a><span class="lineno"> 1060</span>  promise(promise&& __rhs) noexcept</div><div class="line"><a name="l01061"></a><span class="lineno"> 1061</span>  : _M_future(std::move(__rhs._M_future)),</div><div class="line"><a name="l01062"></a><span class="lineno"> 1062</span>  _M_storage(std::move(__rhs._M_storage))</div><div class="line"><a name="l01063"></a><span class="lineno"> 1063</span>  { }</div><div class="line"><a name="l01064"></a><span class="lineno"> 1064</span> </div><div class="line"><a name="l01065"></a><span class="lineno"> 1065</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Allocator></div><div class="line"><a name="l01066"></a><span class="lineno"> 1066</span>  promise(allocator_arg_t, <span class="keyword">const</span> _Allocator& __a)</div><div class="line"><a name="l01067"></a><span class="lineno"> 1067</span>  : _M_future(<a class="code" href="a01538.html">std</a>::<a class="code" href="a01472.html#ga84894e14d771a93b933577b3f8f191cc">allocate_shared</a><_State>(__a)),</div><div class="line"><a name="l01068"></a><span class="lineno"> 1068</span>  _M_storage(__future_base::_S_allocate_result<_Res>(__a))</div><div class="line"><a name="l01069"></a><span class="lineno"> 1069</span>  { }</div><div class="line"><a name="l01070"></a><span class="lineno"> 1070</span> </div><div class="line"><a name="l01071"></a><span class="lineno"> 1071</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Allocator></div><div class="line"><a name="l01072"></a><span class="lineno"> 1072</span>  promise(allocator_arg_t, <span class="keyword">const</span> _Allocator&, promise&& __rhs)</div><div class="line"><a name="l01073"></a><span class="lineno"> 1073</span>  : _M_future(<a class="code" href="a01538.html">std</a>::move(__rhs._M_future)),</div><div class="line"><a name="l01074"></a><span class="lineno"> 1074</span>  _M_storage(<a class="code" href="a01538.html">std</a>::move(__rhs._M_storage))</div><div class="line"><a name="l01075"></a><span class="lineno"> 1075</span>  { }</div><div class="line"><a name="l01076"></a><span class="lineno"> 1076</span> </div><div class="line"><a name="l01077"></a><span class="lineno"> 1077</span>  promise(<span class="keyword">const</span> promise&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l01078"></a><span class="lineno"> 1078</span> </div><div class="line"><a name="l01079"></a><span class="lineno"> 1079</span>  ~promise()</div><div class="line"><a name="l01080"></a><span class="lineno"> 1080</span>  {</div><div class="line"><a name="l01081"></a><span class="lineno"> 1081</span>  <span class="keywordflow">if</span> (static_cast<bool>(_M_future) && !_M_future.unique())</div><div class="line"><a name="l01082"></a><span class="lineno"> 1082</span>  _M_future->_M_break_promise(std::move(_M_storage));</div><div class="line"><a name="l01083"></a><span class="lineno"> 1083</span>  }</div><div class="line"><a name="l01084"></a><span class="lineno"> 1084</span> </div><div class="line"><a name="l01085"></a><span class="lineno"> 1085</span>  <span class="comment">// Assignment</span></div><div class="line"><a name="l01086"></a><span class="lineno"> 1086</span>  promise&</div><div class="line"><a name="l01087"></a><span class="lineno"> 1087</span>  operator=(promise&& __rhs) noexcept</div><div class="line"><a name="l01088"></a><span class="lineno"> 1088</span>  {</div><div class="line"><a name="l01089"></a><span class="lineno"> 1089</span>  promise(std::move(__rhs)).swap(*<span class="keyword">this</span>);</div><div class="line"><a name="l01090"></a><span class="lineno"> 1090</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l01091"></a><span class="lineno"> 1091</span>  }</div><div class="line"><a name="l01092"></a><span class="lineno"> 1092</span> </div><div class="line"><a name="l01093"></a><span class="lineno"> 1093</span>  promise& operator=(<span class="keyword">const</span> promise&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l01094"></a><span class="lineno"> 1094</span> </div><div class="line"><a name="l01095"></a><span class="lineno"> 1095</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01096"></a><span class="lineno"> 1096</span>  <a class="code" href="a01469.html#ga2700089f8b9371e6aafdb9a7e7a552e7">swap</a>(promise& __rhs) noexcept</div><div class="line"><a name="l01097"></a><span class="lineno"> 1097</span>  {</div><div class="line"><a name="l01098"></a><span class="lineno"> 1098</span>  _M_future.swap(__rhs._M_future);</div><div class="line"><a name="l01099"></a><span class="lineno"> 1099</span>  _M_storage.swap(__rhs._M_storage);</div><div class="line"><a name="l01100"></a><span class="lineno"> 1100</span>  }</div><div class="line"><a name="l01101"></a><span class="lineno"> 1101</span> </div><div class="line"><a name="l01102"></a><span class="lineno"> 1102</span>  <span class="comment">// Retrieving the result</span></div><div class="line"><a name="l01103"></a><span class="lineno"> 1103</span>  future<_Res></div><div class="line"><a name="l01104"></a><span class="lineno"> 1104</span>  get_future()</div><div class="line"><a name="l01105"></a><span class="lineno"> 1105</span>  { <span class="keywordflow">return</span> future<_Res>(_M_future); }</div><div class="line"><a name="l01106"></a><span class="lineno"> 1106</span> </div><div class="line"><a name="l01107"></a><span class="lineno"> 1107</span>  <span class="comment">// Setting the result</span></div><div class="line"><a name="l01108"></a><span class="lineno"> 1108</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01109"></a><span class="lineno"> 1109</span>  set_value(<span class="keyword">const</span> _Res& __r)</div><div class="line"><a name="l01110"></a><span class="lineno"> 1110</span>  { _M_future->_M_set_result(_State::__setter(<span class="keyword">this</span>, __r)); }</div><div class="line"><a name="l01111"></a><span class="lineno"> 1111</span> </div><div class="line"><a name="l01112"></a><span class="lineno"> 1112</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01113"></a><span class="lineno"> 1113</span>  set_value(_Res&& __r)</div><div class="line"><a name="l01114"></a><span class="lineno"> 1114</span>  { _M_future->_M_set_result(_State::__setter(<span class="keyword">this</span>, std::move(__r))); }</div><div class="line"><a name="l01115"></a><span class="lineno"> 1115</span> </div><div class="line"><a name="l01116"></a><span class="lineno"> 1116</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01117"></a><span class="lineno"> 1117</span>  set_exception(exception_ptr __p)</div><div class="line"><a name="l01118"></a><span class="lineno"> 1118</span>  { _M_future->_M_set_result(_State::__setter(__p, <span class="keyword">this</span>)); }</div><div class="line"><a name="l01119"></a><span class="lineno"> 1119</span> </div><div class="line"><a name="l01120"></a><span class="lineno"> 1120</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01121"></a><span class="lineno"> 1121</span>  set_value_at_thread_exit(<span class="keyword">const</span> _Res& __r)</div><div class="line"><a name="l01122"></a><span class="lineno"> 1122</span>  {</div><div class="line"><a name="l01123"></a><span class="lineno"> 1123</span>  _M_future->_M_set_delayed_result(_State::__setter(<span class="keyword">this</span>, __r),</div><div class="line"><a name="l01124"></a><span class="lineno"> 1124</span>  _M_future);</div><div class="line"><a name="l01125"></a><span class="lineno"> 1125</span>  }</div><div class="line"><a name="l01126"></a><span class="lineno"> 1126</span> </div><div class="line"><a name="l01127"></a><span class="lineno"> 1127</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01128"></a><span class="lineno"> 1128</span>  set_value_at_thread_exit(_Res&& __r)</div><div class="line"><a name="l01129"></a><span class="lineno"> 1129</span>  {</div><div class="line"><a name="l01130"></a><span class="lineno"> 1130</span>  _M_future->_M_set_delayed_result(</div><div class="line"><a name="l01131"></a><span class="lineno"> 1131</span>  _State::__setter(<span class="keyword">this</span>, std::move(__r)), _M_future);</div><div class="line"><a name="l01132"></a><span class="lineno"> 1132</span>  }</div><div class="line"><a name="l01133"></a><span class="lineno"> 1133</span> </div><div class="line"><a name="l01134"></a><span class="lineno"> 1134</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01135"></a><span class="lineno"> 1135</span>  set_exception_at_thread_exit(exception_ptr __p)</div><div class="line"><a name="l01136"></a><span class="lineno"> 1136</span>  {</div><div class="line"><a name="l01137"></a><span class="lineno"> 1137</span>  _M_future->_M_set_delayed_result(_State::__setter(__p, <span class="keyword">this</span>),</div><div class="line"><a name="l01138"></a><span class="lineno"> 1138</span>  _M_future);</div><div class="line"><a name="l01139"></a><span class="lineno"> 1139</span>  }</div><div class="line"><a name="l01140"></a><span class="lineno"> 1140</span>  };</div><div class="line"><a name="l01141"></a><span class="lineno"> 1141</span> </div><div class="line"><a name="l01142"></a><span class="lineno"> 1142</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res></div><div class="line"><a name="l01143"></a><span class="lineno"> 1143</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span></div><div class="line"><a name="l01144"></a><span class="lineno"> 1144</span>  <a class="code" href="a01469.html#ga2700089f8b9371e6aafdb9a7e7a552e7">swap</a>(promise<_Res>& __x, promise<_Res>& __y) noexcept</div><div class="line"><a name="l01145"></a><span class="lineno"> 1145</span>  { __x.swap(__y); }</div><div class="line"><a name="l01146"></a><span class="lineno"> 1146</span> </div><div class="line"><a name="l01147"></a><span class="lineno"> 1147</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span> _Alloc></div><div class="line"><a name="l01148"></a><span class="lineno"> 1148</span>  <span class="keyword">struct </span>uses_allocator<promise<_Res>, _Alloc></div><div class="line"><a name="l01149"></a><span class="lineno"> 1149</span>  : <span class="keyword">public</span> <a class="code" href="a01476.html#ga6a860513044e23d34e553ea986e83fa1">true_type</a> { };</div><div class="line"><a name="l01150"></a><span class="lineno"> 1150</span> </div><div class="line"><a name="l01151"></a><span class="lineno"> 1151</span> <span class="comment"></span></div><div class="line"><a name="l01152"></a><span class="lineno"> 1152</span> <span class="comment"> /// Partial specialization for promise<R&></span></div><div class="line"><a name="l01153"></a><span class="lineno"> 1153</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Res></div><div class="line"><a name="l01154"></a><span class="lineno"><a class="line" href="a02364.html"> 1154</a></span>  <span class="keyword">class </span><a class="code" href="a02244.html">promise</a><_Res&></div><div class="line"><a name="l01155"></a><span class="lineno"> 1155</span>  {</div><div class="line"><a name="l01156"></a><span class="lineno"> 1156</span>  <span class="keyword">typedef</span> __future_base::_State_base _State;</div><div class="line"><a name="l01157"></a><span class="lineno"> 1157</span>  <span class="keyword">typedef</span> <a class="code" href="a02320.html">__future_base::_Result<_Res&></a> <a class="code" href="a02320.html">_Res_type</a>;</div><div class="line"><a name="l01158"></a><span class="lineno"> 1158</span>  <span class="keyword">typedef</span> <a class="code" href="a07964.html">__future_base::_Ptr<_Res_type></a> <a class="code" href="a07964.html">_Ptr_type</a>;</div><div class="line"><a name="l01159"></a><span class="lineno"> 1159</span>  <span class="keyword">template</span><<span class="keyword">typename</span>, <span class="keyword">typename</span>> <span class="keyword">friend</span> <span class="keyword">class </span>_State::_Setter;</div><div class="line"><a name="l01160"></a><span class="lineno"> 1160</span>  <span class="keyword">friend</span> _State;</div><div class="line"><a name="l01161"></a><span class="lineno"> 1161</span> </div><div class="line"><a name="l01162"></a><span class="lineno"> 1162</span>  <a class="code" href="a06848.html">shared_ptr<_State></a> _M_future;</div><div class="line"><a name="l01163"></a><span class="lineno"> 1163</span>  <a class="code" href="a07964.html">_Ptr_type</a> _M_storage;</div><div class="line"><a name="l01164"></a><span class="lineno"> 1164</span> </div><div class="line"><a name="l01165"></a><span class="lineno"> 1165</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l01166"></a><span class="lineno"> 1166</span>  <a class="code" href="a02244.html">promise</a>()</div><div class="line"><a name="l01167"></a><span class="lineno"> 1167</span>  : _M_future(std::make_shared<_State>()),</div><div class="line"><a name="l01168"></a><span class="lineno"> 1168</span>  _M_storage(<span class="keyword">new</span> <a class="code" href="a02320.html">_Res_type</a>())</div><div class="line"><a name="l01169"></a><span class="lineno"> 1169</span>  { }</div><div class="line"><a name="l01170"></a><span class="lineno"> 1170</span> </div><div class="line"><a name="l01171"></a><span class="lineno"> 1171</span>  <a class="code" href="a02244.html">promise</a>(<a class="code" href="a02244.html">promise</a>&& __rhs) noexcept</div><div class="line"><a name="l01172"></a><span class="lineno"> 1172</span>  : _M_future(std::move(__rhs._M_future)),</div><div class="line"><a name="l01173"></a><span class="lineno"> 1173</span>  _M_storage(std::move(__rhs._M_storage))</div><div class="line"><a name="l01174"></a><span class="lineno"> 1174</span>  { }</div><div class="line"><a name="l01175"></a><span class="lineno"> 1175</span> </div><div class="line"><a name="l01176"></a><span class="lineno"> 1176</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Allocator></div><div class="line"><a name="l01177"></a><span class="lineno"> 1177</span>  <a class="code" href="a02244.html">promise</a>(<a class="code" href="a08012.html">allocator_arg_t</a>, <span class="keyword">const</span> _Allocator& __a)</div><div class="line"><a name="l01178"></a><span class="lineno"> 1178</span>  : _M_future(std::allocate_shared<_State>(__a)),</div><div class="line"><a name="l01179"></a><span class="lineno"> 1179</span>  _M_storage(__future_base::_S_allocate_result<_Res&>(__a))</div><div class="line"><a name="l01180"></a><span class="lineno"> 1180</span>  { }</div><div class="line"><a name="l01181"></a><span class="lineno"> 1181</span> </div><div class="line"><a name="l01182"></a><span class="lineno"> 1182</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Allocator></div><div class="line"><a name="l01183"></a><span class="lineno"> 1183</span>  <a class="code" href="a02244.html">promise</a>(<a class="code" href="a08012.html">allocator_arg_t</a>, <span class="keyword">const</span> _Allocator&, <a class="code" href="a02244.html">promise</a>&& __rhs)</div><div class="line"><a name="l01184"></a><span class="lineno"> 1184</span>  : _M_future(std::move(__rhs._M_future)),</div><div class="line"><a name="l01185"></a><span class="lineno"> 1185</span>  _M_storage(std::move(__rhs._M_storage))</div><div class="line"><a name="l01186"></a><span class="lineno"> 1186</span>  { }</div><div class="line"><a name="l01187"></a><span class="lineno"> 1187</span> </div><div class="line"><a name="l01188"></a><span class="lineno"> 1188</span>  <a class="code" href="a02244.html">promise</a>(<span class="keyword">const</span> <a class="code" href="a02244.html">promise</a>&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l01189"></a><span class="lineno"> 1189</span> </div><div class="line"><a name="l01190"></a><span class="lineno"> 1190</span>  ~<a class="code" href="a02244.html">promise</a>()</div><div class="line"><a name="l01191"></a><span class="lineno"> 1191</span>  {</div><div class="line"><a name="l01192"></a><span class="lineno"> 1192</span>  <span class="keywordflow">if</span> (static_cast<bool>(_M_future) && !_M_future.unique())</div><div class="line"><a name="l01193"></a><span class="lineno"> 1193</span>  _M_future->_M_break_promise(std::move(_M_storage));</div><div class="line"><a name="l01194"></a><span class="lineno"> 1194</span>  }</div><div class="line"><a name="l01195"></a><span class="lineno"> 1195</span> </div><div class="line"><a name="l01196"></a><span class="lineno"> 1196</span>  <span class="comment">// Assignment</span></div><div class="line"><a name="l01197"></a><span class="lineno"> 1197</span>  <a class="code" href="a02244.html">promise</a>&</div><div class="line"><a name="l01198"></a><span class="lineno"> 1198</span>  operator=(<a class="code" href="a02244.html">promise</a>&& __rhs) noexcept</div><div class="line"><a name="l01199"></a><span class="lineno"> 1199</span>  {</div><div class="line"><a name="l01200"></a><span class="lineno"> 1200</span>  <a class="code" href="a02244.html">promise</a>(std::move(__rhs)).swap(*<span class="keyword">this</span>);</div><div class="line"><a name="l01201"></a><span class="lineno"> 1201</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l01202"></a><span class="lineno"> 1202</span>  }</div><div class="line"><a name="l01203"></a><span class="lineno"> 1203</span> </div><div class="line"><a name="l01204"></a><span class="lineno"> 1204</span>  <a class="code" href="a02244.html">promise</a>& operator=(<span class="keyword">const</span> <a class="code" href="a02244.html">promise</a>&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l01205"></a><span class="lineno"> 1205</span> </div><div class="line"><a name="l01206"></a><span class="lineno"> 1206</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01207"></a><span class="lineno"> 1207</span>  <a class="code" href="a01469.html#ga2700089f8b9371e6aafdb9a7e7a552e7">swap</a>(<a class="code" href="a02244.html">promise</a>& __rhs) noexcept</div><div class="line"><a name="l01208"></a><span class="lineno"> 1208</span>  {</div><div class="line"><a name="l01209"></a><span class="lineno"> 1209</span>  _M_future.swap(__rhs._M_future);</div><div class="line"><a name="l01210"></a><span class="lineno"> 1210</span>  _M_storage.<a class="code" href="a07964.html#a20128902c397043453a90db55f4ea276">swap</a>(__rhs._M_storage);</div><div class="line"><a name="l01211"></a><span class="lineno"> 1211</span>  }</div><div class="line"><a name="l01212"></a><span class="lineno"> 1212</span> </div><div class="line"><a name="l01213"></a><span class="lineno"> 1213</span>  <span class="comment">// Retrieving the result</span></div><div class="line"><a name="l01214"></a><span class="lineno"> 1214</span>  <a class="code" href="a02344.html">future<_Res&></a></div><div class="line"><a name="l01215"></a><span class="lineno"> 1215</span>  get_future()</div><div class="line"><a name="l01216"></a><span class="lineno"> 1216</span>  { <span class="keywordflow">return</span> <a class="code" href="a02344.html">future<_Res&></a>(_M_future); }</div><div class="line"><a name="l01217"></a><span class="lineno"> 1217</span> </div><div class="line"><a name="l01218"></a><span class="lineno"> 1218</span>  <span class="comment">// Setting the result</span></div><div class="line"><a name="l01219"></a><span class="lineno"> 1219</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01220"></a><span class="lineno"> 1220</span>  set_value(_Res& __r)</div><div class="line"><a name="l01221"></a><span class="lineno"> 1221</span>  { _M_future->_M_set_result(_State::__setter(<span class="keyword">this</span>, __r)); }</div><div class="line"><a name="l01222"></a><span class="lineno"> 1222</span> </div><div class="line"><a name="l01223"></a><span class="lineno"> 1223</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01224"></a><span class="lineno"> 1224</span>  set_exception(<a class="code" href="a05428.html">exception_ptr</a> __p)</div><div class="line"><a name="l01225"></a><span class="lineno"> 1225</span>  { _M_future->_M_set_result(_State::__setter(__p, <span class="keyword">this</span>)); }</div><div class="line"><a name="l01226"></a><span class="lineno"> 1226</span> </div><div class="line"><a name="l01227"></a><span class="lineno"> 1227</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01228"></a><span class="lineno"> 1228</span>  set_value_at_thread_exit(_Res& __r)</div><div class="line"><a name="l01229"></a><span class="lineno"> 1229</span>  {</div><div class="line"><a name="l01230"></a><span class="lineno"> 1230</span>  _M_future->_M_set_delayed_result(_State::__setter(<span class="keyword">this</span>, __r),</div><div class="line"><a name="l01231"></a><span class="lineno"> 1231</span>  _M_future);</div><div class="line"><a name="l01232"></a><span class="lineno"> 1232</span>  }</div><div class="line"><a name="l01233"></a><span class="lineno"> 1233</span> </div><div class="line"><a name="l01234"></a><span class="lineno"> 1234</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01235"></a><span class="lineno"> 1235</span>  set_exception_at_thread_exit(<a class="code" href="a05428.html">exception_ptr</a> __p)</div><div class="line"><a name="l01236"></a><span class="lineno"> 1236</span>  {</div><div class="line"><a name="l01237"></a><span class="lineno"> 1237</span>  _M_future->_M_set_delayed_result(_State::__setter(__p, <span class="keyword">this</span>),</div><div class="line"><a name="l01238"></a><span class="lineno"> 1238</span>  _M_future);</div><div class="line"><a name="l01239"></a><span class="lineno"> 1239</span>  }</div><div class="line"><a name="l01240"></a><span class="lineno"> 1240</span>  };</div><div class="line"><a name="l01241"></a><span class="lineno"> 1241</span> <span class="comment"></span></div><div class="line"><a name="l01242"></a><span class="lineno"> 1242</span> <span class="comment"> /// Explicit specialization for promise<void></span></div><div class="line"><a name="l01243"></a><span class="lineno"> 1243</span> <span class="comment"></span> <span class="keyword">template</span><></div><div class="line"><a name="l01244"></a><span class="lineno"><a class="line" href="a02368.html"> 1244</a></span>  <span class="keyword">class </span><a class="code" href="a02244.html">promise</a><void></div><div class="line"><a name="l01245"></a><span class="lineno"> 1245</span>  {</div><div class="line"><a name="l01246"></a><span class="lineno"> 1246</span>  <span class="keyword">typedef</span> __future_base::_State_base _State;</div><div class="line"><a name="l01247"></a><span class="lineno"> 1247</span>  <span class="keyword">typedef</span> <a class="code" href="a02324.html">__future_base::_Result<void></a> <a class="code" href="a02324.html">_Res_type</a>;</div><div class="line"><a name="l01248"></a><span class="lineno"> 1248</span>  <span class="keyword">typedef</span> <a class="code" href="a07964.html">__future_base::_Ptr<_Res_type></a> <a class="code" href="a07964.html">_Ptr_type</a>;</div><div class="line"><a name="l01249"></a><span class="lineno"> 1249</span>  <span class="keyword">template</span><<span class="keyword">typename</span>, <span class="keyword">typename</span>> <span class="keyword">friend</span> <span class="keyword">class </span>_State::_Setter;</div><div class="line"><a name="l01250"></a><span class="lineno"> 1250</span>  <span class="keyword">friend</span> _State;</div><div class="line"><a name="l01251"></a><span class="lineno"> 1251</span> </div><div class="line"><a name="l01252"></a><span class="lineno"> 1252</span>  <a class="code" href="a06848.html">shared_ptr<_State></a> _M_future;</div><div class="line"><a name="l01253"></a><span class="lineno"> 1253</span>  <a class="code" href="a07964.html">_Ptr_type</a> _M_storage;</div><div class="line"><a name="l01254"></a><span class="lineno"> 1254</span> </div><div class="line"><a name="l01255"></a><span class="lineno"> 1255</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l01256"></a><span class="lineno"> 1256</span>  <a class="code" href="a02244.html">promise</a>()</div><div class="line"><a name="l01257"></a><span class="lineno"> 1257</span>  : _M_future(std::make_shared<_State>()),</div><div class="line"><a name="l01258"></a><span class="lineno"> 1258</span>  _M_storage(<span class="keyword">new</span> <a class="code" href="a02324.html">_Res_type</a>())</div><div class="line"><a name="l01259"></a><span class="lineno"> 1259</span>  { }</div><div class="line"><a name="l01260"></a><span class="lineno"> 1260</span> </div><div class="line"><a name="l01261"></a><span class="lineno"> 1261</span>  <a class="code" href="a02244.html">promise</a>(<a class="code" href="a02244.html">promise</a>&& __rhs) noexcept</div><div class="line"><a name="l01262"></a><span class="lineno"> 1262</span>  : _M_future(std::move(__rhs._M_future)),</div><div class="line"><a name="l01263"></a><span class="lineno"> 1263</span>  _M_storage(std::move(__rhs._M_storage))</div><div class="line"><a name="l01264"></a><span class="lineno"> 1264</span>  { }</div><div class="line"><a name="l01265"></a><span class="lineno"> 1265</span> </div><div class="line"><a name="l01266"></a><span class="lineno"> 1266</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Allocator></div><div class="line"><a name="l01267"></a><span class="lineno"> 1267</span>  <a class="code" href="a02244.html">promise</a>(<a class="code" href="a08012.html">allocator_arg_t</a>, <span class="keyword">const</span> _Allocator& __a)</div><div class="line"><a name="l01268"></a><span class="lineno"> 1268</span>  : _M_future(std::allocate_shared<_State>(__a)),</div><div class="line"><a name="l01269"></a><span class="lineno"> 1269</span>  _M_storage(__future_base::_S_allocate_result<void>(__a))</div><div class="line"><a name="l01270"></a><span class="lineno"> 1270</span>  { }</div><div class="line"><a name="l01271"></a><span class="lineno"> 1271</span> </div><div class="line"><a name="l01272"></a><span class="lineno"> 1272</span>  <span class="comment">// _GLIBCXX_RESOLVE_LIB_DEFECTS</span></div><div class="line"><a name="l01273"></a><span class="lineno"> 1273</span>  <span class="comment">// 2095. missing constructors needed for uses-allocator construction</span></div><div class="line"><a name="l01274"></a><span class="lineno"> 1274</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Allocator></div><div class="line"><a name="l01275"></a><span class="lineno"> 1275</span>  <a class="code" href="a02244.html">promise</a>(<a class="code" href="a08012.html">allocator_arg_t</a>, <span class="keyword">const</span> _Allocator&, <a class="code" href="a02244.html">promise</a>&& __rhs)</div><div class="line"><a name="l01276"></a><span class="lineno"> 1276</span>  : _M_future(std::move(__rhs._M_future)),</div><div class="line"><a name="l01277"></a><span class="lineno"> 1277</span>  _M_storage(std::move(__rhs._M_storage))</div><div class="line"><a name="l01278"></a><span class="lineno"> 1278</span>  { }</div><div class="line"><a name="l01279"></a><span class="lineno"> 1279</span> </div><div class="line"><a name="l01280"></a><span class="lineno"> 1280</span>  <a class="code" href="a02244.html">promise</a>(<span class="keyword">const</span> <a class="code" href="a02244.html">promise</a>&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l01281"></a><span class="lineno"> 1281</span> </div><div class="line"><a name="l01282"></a><span class="lineno"> 1282</span>  ~<a class="code" href="a02244.html">promise</a>()</div><div class="line"><a name="l01283"></a><span class="lineno"> 1283</span>  {</div><div class="line"><a name="l01284"></a><span class="lineno"> 1284</span>  <span class="keywordflow">if</span> (static_cast<bool>(_M_future) && !_M_future.unique())</div><div class="line"><a name="l01285"></a><span class="lineno"> 1285</span>  _M_future->_M_break_promise(std::move(_M_storage));</div><div class="line"><a name="l01286"></a><span class="lineno"> 1286</span>  }</div><div class="line"><a name="l01287"></a><span class="lineno"> 1287</span> </div><div class="line"><a name="l01288"></a><span class="lineno"> 1288</span>  <span class="comment">// Assignment</span></div><div class="line"><a name="l01289"></a><span class="lineno"> 1289</span>  <a class="code" href="a02244.html">promise</a>&</div><div class="line"><a name="l01290"></a><span class="lineno"> 1290</span>  operator=(<a class="code" href="a02244.html">promise</a>&& __rhs) noexcept</div><div class="line"><a name="l01291"></a><span class="lineno"> 1291</span>  {</div><div class="line"><a name="l01292"></a><span class="lineno"> 1292</span>  <a class="code" href="a02244.html">promise</a>(std::move(__rhs)).swap(*<span class="keyword">this</span>);</div><div class="line"><a name="l01293"></a><span class="lineno"> 1293</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l01294"></a><span class="lineno"> 1294</span>  }</div><div class="line"><a name="l01295"></a><span class="lineno"> 1295</span> </div><div class="line"><a name="l01296"></a><span class="lineno"> 1296</span>  <a class="code" href="a02244.html">promise</a>& operator=(<span class="keyword">const</span> <a class="code" href="a02244.html">promise</a>&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l01297"></a><span class="lineno"> 1297</span> </div><div class="line"><a name="l01298"></a><span class="lineno"> 1298</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01299"></a><span class="lineno"> 1299</span>  <a class="code" href="a01469.html#ga2700089f8b9371e6aafdb9a7e7a552e7">swap</a>(<a class="code" href="a02244.html">promise</a>& __rhs) noexcept</div><div class="line"><a name="l01300"></a><span class="lineno"> 1300</span>  {</div><div class="line"><a name="l01301"></a><span class="lineno"> 1301</span>  _M_future.swap(__rhs._M_future);</div><div class="line"><a name="l01302"></a><span class="lineno"> 1302</span>  _M_storage.<a class="code" href="a07964.html#a20128902c397043453a90db55f4ea276">swap</a>(__rhs._M_storage);</div><div class="line"><a name="l01303"></a><span class="lineno"> 1303</span>  }</div><div class="line"><a name="l01304"></a><span class="lineno"> 1304</span> </div><div class="line"><a name="l01305"></a><span class="lineno"> 1305</span>  <span class="comment">// Retrieving the result</span></div><div class="line"><a name="l01306"></a><span class="lineno"> 1306</span>  <a class="code" href="a02348.html">future<void></a></div><div class="line"><a name="l01307"></a><span class="lineno"> 1307</span>  get_future()</div><div class="line"><a name="l01308"></a><span class="lineno"> 1308</span>  { <span class="keywordflow">return</span> <a class="code" href="a02348.html">future<void></a>(_M_future); }</div><div class="line"><a name="l01309"></a><span class="lineno"> 1309</span> </div><div class="line"><a name="l01310"></a><span class="lineno"> 1310</span>  <span class="comment">// Setting the result</span></div><div class="line"><a name="l01311"></a><span class="lineno"> 1311</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01312"></a><span class="lineno"> 1312</span>  set_value()</div><div class="line"><a name="l01313"></a><span class="lineno"> 1313</span>  { _M_future->_M_set_result(_State::__setter(<span class="keyword">this</span>)); }</div><div class="line"><a name="l01314"></a><span class="lineno"> 1314</span> </div><div class="line"><a name="l01315"></a><span class="lineno"> 1315</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01316"></a><span class="lineno"> 1316</span>  set_exception(<a class="code" href="a05428.html">exception_ptr</a> __p)</div><div class="line"><a name="l01317"></a><span class="lineno"> 1317</span>  { _M_future->_M_set_result(_State::__setter(__p, <span class="keyword">this</span>)); }</div><div class="line"><a name="l01318"></a><span class="lineno"> 1318</span> </div><div class="line"><a name="l01319"></a><span class="lineno"> 1319</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01320"></a><span class="lineno"> 1320</span>  set_value_at_thread_exit()</div><div class="line"><a name="l01321"></a><span class="lineno"> 1321</span>  { _M_future->_M_set_delayed_result(_State::__setter(<span class="keyword">this</span>), _M_future); }</div><div class="line"><a name="l01322"></a><span class="lineno"> 1322</span> </div><div class="line"><a name="l01323"></a><span class="lineno"> 1323</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01324"></a><span class="lineno"> 1324</span>  set_exception_at_thread_exit(<a class="code" href="a05428.html">exception_ptr</a> __p)</div><div class="line"><a name="l01325"></a><span class="lineno"> 1325</span>  {</div><div class="line"><a name="l01326"></a><span class="lineno"> 1326</span>  _M_future->_M_set_delayed_result(_State::__setter(__p, <span class="keyword">this</span>),</div><div class="line"><a name="l01327"></a><span class="lineno"> 1327</span>  _M_future);</div><div class="line"><a name="l01328"></a><span class="lineno"> 1328</span>  }</div><div class="line"><a name="l01329"></a><span class="lineno"> 1329</span>  };</div><div class="line"><a name="l01330"></a><span class="lineno"> 1330</span> </div><div class="line"><a name="l01331"></a><span class="lineno"> 1331</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Ptr_type, <span class="keyword">typename</span> _Fn, <span class="keyword">typename</span> _Res></div><div class="line"><a name="l01332"></a><span class="lineno"> 1332</span>  <span class="keyword">struct </span>__future_base::_Task_setter</div><div class="line"><a name="l01333"></a><span class="lineno"> 1333</span>  {</div><div class="line"><a name="l01334"></a><span class="lineno"> 1334</span>  <span class="comment">// Invoke the function and provide the result to the caller.</span></div><div class="line"><a name="l01335"></a><span class="lineno"> 1335</span>  _Ptr_type operator()()<span class="keyword"> const</span></div><div class="line"><a name="l01336"></a><span class="lineno"> 1336</span> <span class="keyword"> </span>{</div><div class="line"><a name="l01337"></a><span class="lineno"> 1337</span>  __try</div><div class="line"><a name="l01338"></a><span class="lineno"> 1338</span>  {</div><div class="line"><a name="l01339"></a><span class="lineno"> 1339</span>  (*_M_result)->_M_set((*_M_fn)());</div><div class="line"><a name="l01340"></a><span class="lineno"> 1340</span>  }</div><div class="line"><a name="l01341"></a><span class="lineno"> 1341</span>  __catch(<span class="keyword">const</span> <a class="code" href="a05332.html">__cxxabiv1::__forced_unwind</a>&)</div><div class="line"><a name="l01342"></a><span class="lineno"> 1342</span>  {</div><div class="line"><a name="l01343"></a><span class="lineno"> 1343</span>  __throw_exception_again; <span class="comment">// will cause broken_promise</span></div><div class="line"><a name="l01344"></a><span class="lineno"> 1344</span>  }</div><div class="line"><a name="l01345"></a><span class="lineno"> 1345</span>  __catch(...)</div><div class="line"><a name="l01346"></a><span class="lineno"> 1346</span>  {</div><div class="line"><a name="l01347"></a><span class="lineno"> 1347</span>  (*_M_result)->_M_error = <a class="code" href="a01486.html#ga02cdcc517fefe661313437aa9356a28f">current_exception</a>();</div><div class="line"><a name="l01348"></a><span class="lineno"> 1348</span>  }</div><div class="line"><a name="l01349"></a><span class="lineno"> 1349</span>  <span class="keywordflow">return</span> std::move(*_M_result);</div><div class="line"><a name="l01350"></a><span class="lineno"> 1350</span>  }</div><div class="line"><a name="l01351"></a><span class="lineno"> 1351</span>  _Ptr_type* _M_result;</div><div class="line"><a name="l01352"></a><span class="lineno"> 1352</span>  _Fn* _M_fn;</div><div class="line"><a name="l01353"></a><span class="lineno"> 1353</span>  };</div><div class="line"><a name="l01354"></a><span class="lineno"> 1354</span> </div><div class="line"><a name="l01355"></a><span class="lineno"> 1355</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Ptr_type, <span class="keyword">typename</span> _Fn></div><div class="line"><a name="l01356"></a><span class="lineno"> 1356</span>  <span class="keyword">struct </span>__future_base::_Task_setter<_Ptr_type, _Fn, void></div><div class="line"><a name="l01357"></a><span class="lineno"> 1357</span>  {</div><div class="line"><a name="l01358"></a><span class="lineno"> 1358</span>  _Ptr_type operator()()<span class="keyword"> const</span></div><div class="line"><a name="l01359"></a><span class="lineno"> 1359</span> <span class="keyword"> </span>{</div><div class="line"><a name="l01360"></a><span class="lineno"> 1360</span>  __try</div><div class="line"><a name="l01361"></a><span class="lineno"> 1361</span>  {</div><div class="line"><a name="l01362"></a><span class="lineno"> 1362</span>  (*_M_fn)();</div><div class="line"><a name="l01363"></a><span class="lineno"> 1363</span>  }</div><div class="line"><a name="l01364"></a><span class="lineno"> 1364</span>  __catch(<span class="keyword">const</span> <a class="code" href="a05332.html">__cxxabiv1::__forced_unwind</a>&)</div><div class="line"><a name="l01365"></a><span class="lineno"> 1365</span>  {</div><div class="line"><a name="l01366"></a><span class="lineno"> 1366</span>  __throw_exception_again; <span class="comment">// will cause broken_promise</span></div><div class="line"><a name="l01367"></a><span class="lineno"> 1367</span>  }</div><div class="line"><a name="l01368"></a><span class="lineno"> 1368</span>  __catch(...)</div><div class="line"><a name="l01369"></a><span class="lineno"> 1369</span>  {</div><div class="line"><a name="l01370"></a><span class="lineno"> 1370</span>  (*_M_result)->_M_error = <a class="code" href="a01486.html#ga02cdcc517fefe661313437aa9356a28f">current_exception</a>();</div><div class="line"><a name="l01371"></a><span class="lineno"> 1371</span>  }</div><div class="line"><a name="l01372"></a><span class="lineno"> 1372</span>  <span class="keywordflow">return</span> std::move(*_M_result);</div><div class="line"><a name="l01373"></a><span class="lineno"> 1373</span>  }</div><div class="line"><a name="l01374"></a><span class="lineno"> 1374</span>  _Ptr_type* _M_result;</div><div class="line"><a name="l01375"></a><span class="lineno"> 1375</span>  _Fn* _M_fn;</div><div class="line"><a name="l01376"></a><span class="lineno"> 1376</span>  };</div><div class="line"><a name="l01377"></a><span class="lineno"> 1377</span> </div><div class="line"><a name="l01378"></a><span class="lineno"> 1378</span>  <span class="comment">// Holds storage for a packaged_task's result.</span></div><div class="line"><a name="l01379"></a><span class="lineno"> 1379</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l01380"></a><span class="lineno"> 1380</span>  <span class="keyword">struct </span>__future_base::_Task_state_base<_Res(_Args...)></div><div class="line"><a name="l01381"></a><span class="lineno"> 1381</span>  : __future_base::_State_base</div><div class="line"><a name="l01382"></a><span class="lineno"> 1382</span>  {</div><div class="line"><a name="l01383"></a><span class="lineno"> 1383</span>  <span class="keyword">typedef</span> _Res _Res_type;</div><div class="line"><a name="l01384"></a><span class="lineno"> 1384</span> </div><div class="line"><a name="l01385"></a><span class="lineno"> 1385</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Alloc></div><div class="line"><a name="l01386"></a><span class="lineno"> 1386</span>  _Task_state_base(<span class="keyword">const</span> _Alloc& __a)</div><div class="line"><a name="l01387"></a><span class="lineno"> 1387</span>  : _M_result(_S_allocate_result<_Res>(__a))</div><div class="line"><a name="l01388"></a><span class="lineno"> 1388</span>  { }</div><div class="line"><a name="l01389"></a><span class="lineno"> 1389</span> </div><div class="line"><a name="l01390"></a><span class="lineno"> 1390</span>  <span class="comment">// Invoke the stored task and make the state ready.</span></div><div class="line"><a name="l01391"></a><span class="lineno"> 1391</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span></div><div class="line"><a name="l01392"></a><span class="lineno"> 1392</span>  _M_run(_Args&&... __args) = 0;</div><div class="line"><a name="l01393"></a><span class="lineno"> 1393</span> </div><div class="line"><a name="l01394"></a><span class="lineno"> 1394</span>  <span class="comment">// Invoke the stored task and make the state ready at thread exit.</span></div><div class="line"><a name="l01395"></a><span class="lineno"> 1395</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span></div><div class="line"><a name="l01396"></a><span class="lineno"> 1396</span>  _M_run_delayed(_Args&&... __args, weak_ptr<_State_base>) = 0;</div><div class="line"><a name="l01397"></a><span class="lineno"> 1397</span> </div><div class="line"><a name="l01398"></a><span class="lineno"> 1398</span>  <span class="keyword">virtual</span> shared_ptr<_Task_state_base></div><div class="line"><a name="l01399"></a><span class="lineno"> 1399</span>  _M_reset() = 0;</div><div class="line"><a name="l01400"></a><span class="lineno"> 1400</span> </div><div class="line"><a name="l01401"></a><span class="lineno"> 1401</span>  <span class="keyword">typedef</span> __future_base::_Ptr<_Result<_Res>> _Ptr_type;</div><div class="line"><a name="l01402"></a><span class="lineno"> 1402</span>  _Ptr_type _M_result;</div><div class="line"><a name="l01403"></a><span class="lineno"> 1403</span>  };</div><div class="line"><a name="l01404"></a><span class="lineno"> 1404</span> </div><div class="line"><a name="l01405"></a><span class="lineno"> 1405</span>  <span class="comment">// Holds a packaged_task's stored task.</span></div><div class="line"><a name="l01406"></a><span class="lineno"> 1406</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Fn, <span class="keyword">typename</span> _Alloc, <span class="keyword">typename</span> _Res, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l01407"></a><span class="lineno"> 1407</span>  <span class="keyword">struct </span>__future_base::_Task_state<_Fn, _Alloc, _Res(_Args...)> final</div><div class="line"><a name="l01408"></a><span class="lineno"> 1408</span>  : __future_base::_Task_state_base<_Res(_Args...)></div><div class="line"><a name="l01409"></a><span class="lineno"> 1409</span>  {</div><div class="line"><a name="l01410"></a><span class="lineno"> 1410</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Fn2></div><div class="line"><a name="l01411"></a><span class="lineno"> 1411</span>  _Task_state(_Fn2&& __fn, <span class="keyword">const</span> _Alloc& __a)</div><div class="line"><a name="l01412"></a><span class="lineno"> 1412</span>  : _Task_state_base<_Res(_Args...)>(__a),</div><div class="line"><a name="l01413"></a><span class="lineno"> 1413</span>  _M_impl(<a class="code" href="a01538.html">std</a>::<a class="code" href="a01477.html#gacb5baec338e12b99cb6bddea7506c7c6">forward</a><_Fn2>(__fn), __a)</div><div class="line"><a name="l01414"></a><span class="lineno"> 1414</span>  { }</div><div class="line"><a name="l01415"></a><span class="lineno"> 1415</span> </div><div class="line"><a name="l01416"></a><span class="lineno"> 1416</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l01417"></a><span class="lineno"> 1417</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span></div><div class="line"><a name="l01418"></a><span class="lineno"> 1418</span>  _M_run(_Args&&... __args)</div><div class="line"><a name="l01419"></a><span class="lineno"> 1419</span>  {</div><div class="line"><a name="l01420"></a><span class="lineno"> 1420</span>  <span class="keyword">auto</span> __boundfn = [&] () -> <span class="keyword">typename</span> result_of<_Fn&(_Args&&...)>::type {</div><div class="line"><a name="l01421"></a><span class="lineno"> 1421</span>  <span class="keywordflow">return</span> <a class="code" href="a01477.html#ga5f5136396a5ab3c02543bb01d4364f40">std::__invoke</a>(_M_impl._M_fn, std::forward<_Args>(__args)...);</div><div class="line"><a name="l01422"></a><span class="lineno"> 1422</span>  };</div><div class="line"><a name="l01423"></a><span class="lineno"> 1423</span>  this->_M_set_result(_S_task_setter(this->_M_result, __boundfn));</div><div class="line"><a name="l01424"></a><span class="lineno"> 1424</span>  }</div><div class="line"><a name="l01425"></a><span class="lineno"> 1425</span> </div><div class="line"><a name="l01426"></a><span class="lineno"> 1426</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span></div><div class="line"><a name="l01427"></a><span class="lineno"> 1427</span>  _M_run_delayed(_Args&&... __args, weak_ptr<_State_base> __self)</div><div class="line"><a name="l01428"></a><span class="lineno"> 1428</span>  {</div><div class="line"><a name="l01429"></a><span class="lineno"> 1429</span>  <span class="keyword">auto</span> __boundfn = [&] () -> <span class="keyword">typename</span> result_of<_Fn&(_Args&&...)>::type {</div><div class="line"><a name="l01430"></a><span class="lineno"> 1430</span>  <span class="keywordflow">return</span> <a class="code" href="a01477.html#ga5f5136396a5ab3c02543bb01d4364f40">std::__invoke</a>(_M_impl._M_fn, std::forward<_Args>(__args)...);</div><div class="line"><a name="l01431"></a><span class="lineno"> 1431</span>  };</div><div class="line"><a name="l01432"></a><span class="lineno"> 1432</span>  this->_M_set_delayed_result(_S_task_setter(this->_M_result, __boundfn),</div><div class="line"><a name="l01433"></a><span class="lineno"> 1433</span>  std::move(__self));</div><div class="line"><a name="l01434"></a><span class="lineno"> 1434</span>  }</div><div class="line"><a name="l01435"></a><span class="lineno"> 1435</span> </div><div class="line"><a name="l01436"></a><span class="lineno"> 1436</span>  <span class="keyword">virtual</span> shared_ptr<_Task_state_base<_Res(_Args...)>></div><div class="line"><a name="l01437"></a><span class="lineno"> 1437</span>  _M_reset();</div><div class="line"><a name="l01438"></a><span class="lineno"> 1438</span> </div><div class="line"><a name="l01439"></a><span class="lineno"> 1439</span>  <span class="keyword">struct </span>_Impl : _Alloc</div><div class="line"><a name="l01440"></a><span class="lineno"> 1440</span>  {</div><div class="line"><a name="l01441"></a><span class="lineno"> 1441</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Fn2></div><div class="line"><a name="l01442"></a><span class="lineno"> 1442</span>  _Impl(_Fn2&& __fn, <span class="keyword">const</span> _Alloc& __a)</div><div class="line"><a name="l01443"></a><span class="lineno"> 1443</span>  : _Alloc(__a), _M_fn(<a class="code" href="a01538.html">std</a>::<a class="code" href="a01477.html#gacb5baec338e12b99cb6bddea7506c7c6">forward</a><_Fn2>(__fn)) { }</div><div class="line"><a name="l01444"></a><span class="lineno"> 1444</span>  _Fn _M_fn;</div><div class="line"><a name="l01445"></a><span class="lineno"> 1445</span>  } _M_impl;</div><div class="line"><a name="l01446"></a><span class="lineno"> 1446</span>  };</div><div class="line"><a name="l01447"></a><span class="lineno"> 1447</span> </div><div class="line"><a name="l01448"></a><span class="lineno"> 1448</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Signature, <span class="keyword">typename</span> _Fn, <span class="keyword">typename</span> _Alloc></div><div class="line"><a name="l01449"></a><span class="lineno"> 1449</span>  <span class="keyword">static</span> shared_ptr<__future_base::_Task_state_base<_Signature>></div><div class="line"><a name="l01450"></a><span class="lineno"> 1450</span>  __create_task_state(_Fn&& __fn, <span class="keyword">const</span> _Alloc& __a)</div><div class="line"><a name="l01451"></a><span class="lineno"> 1451</span>  {</div><div class="line"><a name="l01452"></a><span class="lineno"> 1452</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> decay<_Fn>::type _Fn2;</div><div class="line"><a name="l01453"></a><span class="lineno"> 1453</span>  <span class="keyword">typedef</span> __future_base::_Task_state<_Fn2, _Alloc, _Signature> _State;</div><div class="line"><a name="l01454"></a><span class="lineno"> 1454</span>  <span class="keywordflow">return</span> std::allocate_shared<_State>(__a, std::forward<_Fn>(__fn), __a);</div><div class="line"><a name="l01455"></a><span class="lineno"> 1455</span>  }</div><div class="line"><a name="l01456"></a><span class="lineno"> 1456</span> </div><div class="line"><a name="l01457"></a><span class="lineno"> 1457</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Fn, <span class="keyword">typename</span> _Alloc, <span class="keyword">typename</span> _Res, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l01458"></a><span class="lineno"> 1458</span>  shared_ptr<__future_base::_Task_state_base<_Res(_Args...)>></div><div class="line"><a name="l01459"></a><span class="lineno"> 1459</span>  __future_base::_Task_state<_Fn, _Alloc, _Res(_Args...)>::_M_reset()</div><div class="line"><a name="l01460"></a><span class="lineno"> 1460</span>  {</div><div class="line"><a name="l01461"></a><span class="lineno"> 1461</span>  <span class="keywordflow">return</span> __create_task_state<_Res(_Args...)>(std::move(_M_impl._M_fn),</div><div class="line"><a name="l01462"></a><span class="lineno"> 1462</span>  static_cast<_Alloc&>(_M_impl));</div><div class="line"><a name="l01463"></a><span class="lineno"> 1463</span>  }</div><div class="line"><a name="l01464"></a><span class="lineno"> 1464</span> </div><div class="line"><a name="l01465"></a><span class="lineno"> 1465</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Task, <span class="keyword">typename</span> _Fn, <span class="keywordtype">bool</span></div><div class="line"><a name="l01466"></a><span class="lineno"> 1466</span>  = is_same<_Task, typename decay<_Fn>::type>::value></div><div class="line"><a name="l01467"></a><span class="lineno"> 1467</span>  <span class="keyword">struct </span>__constrain_pkgdtask</div><div class="line"><a name="l01468"></a><span class="lineno"> 1468</span>  { <span class="keyword">typedef</span> <span class="keywordtype">void</span> __type; };</div><div class="line"><a name="l01469"></a><span class="lineno"> 1469</span> </div><div class="line"><a name="l01470"></a><span class="lineno"> 1470</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Task, <span class="keyword">typename</span> _Fn></div><div class="line"><a name="l01471"></a><span class="lineno"> 1471</span>  <span class="keyword">struct </span>__constrain_pkgdtask<_Task, _Fn, true></div><div class="line"><a name="l01472"></a><span class="lineno"> 1472</span>  { };</div><div class="line"><a name="l01473"></a><span class="lineno"> 1473</span> <span class="comment"></span></div><div class="line"><a name="l01474"></a><span class="lineno"> 1474</span> <span class="comment"> /// packaged_task</span></div><div class="line"><a name="l01475"></a><span class="lineno"> 1475</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span>... _ArgTypes></div><div class="line"><a name="l01476"></a><span class="lineno"><a class="line" href="a02396.html"> 1476</a></span>  <span class="keyword">class </span>packaged_task<_Res(_ArgTypes...)></div><div class="line"><a name="l01477"></a><span class="lineno"> 1477</span>  {</div><div class="line"><a name="l01478"></a><span class="lineno"> 1478</span>  <span class="keyword">typedef</span> __future_base::_Task_state_base<_Res(_ArgTypes...)> _State_type;</div><div class="line"><a name="l01479"></a><span class="lineno"> 1479</span>  <a class="code" href="a06848.html">shared_ptr<_State_type></a> _M_state;</div><div class="line"><a name="l01480"></a><span class="lineno"> 1480</span> </div><div class="line"><a name="l01481"></a><span class="lineno"> 1481</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l01482"></a><span class="lineno"> 1482</span>  <span class="comment">// Construction and destruction</span></div><div class="line"><a name="l01483"></a><span class="lineno"> 1483</span>  packaged_task() noexcept { }</div><div class="line"><a name="l01484"></a><span class="lineno"> 1484</span> </div><div class="line"><a name="l01485"></a><span class="lineno"> 1485</span>  <span class="comment">// _GLIBCXX_RESOLVE_LIB_DEFECTS</span></div><div class="line"><a name="l01486"></a><span class="lineno"> 1486</span>  <span class="comment">// 2095. missing constructors needed for uses-allocator construction</span></div><div class="line"><a name="l01487"></a><span class="lineno"> 1487</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Allocator></div><div class="line"><a name="l01488"></a><span class="lineno"> 1488</span>  packaged_task(<a class="code" href="a08012.html">allocator_arg_t</a>, <span class="keyword">const</span> _Allocator& __a) noexcept</div><div class="line"><a name="l01489"></a><span class="lineno"> 1489</span>  { }</div><div class="line"><a name="l01490"></a><span class="lineno"> 1490</span> </div><div class="line"><a name="l01491"></a><span class="lineno"> 1491</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Fn, <span class="keyword">typename</span> = <span class="keyword">typename</span></div><div class="line"><a name="l01492"></a><span class="lineno"> 1492</span>  __constrain_pkgdtask<packaged_task, _Fn>::__type></div><div class="line"><a name="l01493"></a><span class="lineno"> 1493</span>  <span class="keyword">explicit</span></div><div class="line"><a name="l01494"></a><span class="lineno"> 1494</span>  packaged_task(_Fn&& __fn)</div><div class="line"><a name="l01495"></a><span class="lineno"> 1495</span>  : packaged_task(allocator_arg, <a class="code" href="a04704.html">std::allocator<int></a>(),</div><div class="line"><a name="l01496"></a><span class="lineno"> 1496</span>  std::forward<_Fn>(__fn))</div><div class="line"><a name="l01497"></a><span class="lineno"> 1497</span>  { }</div><div class="line"><a name="l01498"></a><span class="lineno"> 1498</span> </div><div class="line"><a name="l01499"></a><span class="lineno"> 1499</span>  <span class="comment">// _GLIBCXX_RESOLVE_LIB_DEFECTS</span></div><div class="line"><a name="l01500"></a><span class="lineno"> 1500</span>  <span class="comment">// 2097. packaged_task constructors should be constrained</span></div><div class="line"><a name="l01501"></a><span class="lineno"> 1501</span>  <span class="comment">// 2407. [this constructor should not be] explicit</span></div><div class="line"><a name="l01502"></a><span class="lineno"> 1502</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Fn, <span class="keyword">typename</span> _Alloc, <span class="keyword">typename</span> = <span class="keyword">typename</span></div><div class="line"><a name="l01503"></a><span class="lineno"> 1503</span>  __constrain_pkgdtask<packaged_task, _Fn>::__type></div><div class="line"><a name="l01504"></a><span class="lineno"> 1504</span>  packaged_task(<a class="code" href="a08012.html">allocator_arg_t</a>, <span class="keyword">const</span> _Alloc& __a, _Fn&& __fn)</div><div class="line"><a name="l01505"></a><span class="lineno"> 1505</span>  : _M_state(__create_task_state<_Res(_ArgTypes...)>(</div><div class="line"><a name="l01506"></a><span class="lineno"> 1506</span>  std::forward<_Fn>(__fn), __a))</div><div class="line"><a name="l01507"></a><span class="lineno"> 1507</span>  { }</div><div class="line"><a name="l01508"></a><span class="lineno"> 1508</span> </div><div class="line"><a name="l01509"></a><span class="lineno"> 1509</span>  ~packaged_task()</div><div class="line"><a name="l01510"></a><span class="lineno"> 1510</span>  {</div><div class="line"><a name="l01511"></a><span class="lineno"> 1511</span>  <span class="keywordflow">if</span> (static_cast<bool>(_M_state) && !_M_state.unique())</div><div class="line"><a name="l01512"></a><span class="lineno"> 1512</span>  _M_state->_M_break_promise(std::move(_M_state->_M_result));</div><div class="line"><a name="l01513"></a><span class="lineno"> 1513</span>  }</div><div class="line"><a name="l01514"></a><span class="lineno"> 1514</span> </div><div class="line"><a name="l01515"></a><span class="lineno"> 1515</span>  <span class="comment">// No copy</span></div><div class="line"><a name="l01516"></a><span class="lineno"> 1516</span>  packaged_task(<span class="keyword">const</span> packaged_task&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l01517"></a><span class="lineno"> 1517</span>  packaged_task& operator=(<span class="keyword">const</span> packaged_task&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l01518"></a><span class="lineno"> 1518</span> </div><div class="line"><a name="l01519"></a><span class="lineno"> 1519</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Allocator></div><div class="line"><a name="l01520"></a><span class="lineno"> 1520</span>  packaged_task(<a class="code" href="a08012.html">allocator_arg_t</a>, <span class="keyword">const</span> _Allocator&,</div><div class="line"><a name="l01521"></a><span class="lineno"> 1521</span>  <span class="keyword">const</span> packaged_task&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l01522"></a><span class="lineno"> 1522</span> </div><div class="line"><a name="l01523"></a><span class="lineno"> 1523</span>  <span class="comment">// Move support</span></div><div class="line"><a name="l01524"></a><span class="lineno"> 1524</span>  packaged_task(packaged_task&& __other) noexcept</div><div class="line"><a name="l01525"></a><span class="lineno"> 1525</span>  { this->swap(__other); }</div><div class="line"><a name="l01526"></a><span class="lineno"> 1526</span> </div><div class="line"><a name="l01527"></a><span class="lineno"> 1527</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Allocator></div><div class="line"><a name="l01528"></a><span class="lineno"> 1528</span>  packaged_task(<a class="code" href="a08012.html">allocator_arg_t</a>, <span class="keyword">const</span> _Allocator&,</div><div class="line"><a name="l01529"></a><span class="lineno"> 1529</span>  packaged_task&& __other) noexcept</div><div class="line"><a name="l01530"></a><span class="lineno"> 1530</span>  { this->swap(__other); }</div><div class="line"><a name="l01531"></a><span class="lineno"> 1531</span> </div><div class="line"><a name="l01532"></a><span class="lineno"> 1532</span>  packaged_task& operator=(packaged_task&& __other) noexcept</div><div class="line"><a name="l01533"></a><span class="lineno"> 1533</span>  {</div><div class="line"><a name="l01534"></a><span class="lineno"> 1534</span>  packaged_task(std::move(__other)).swap(*<span class="keyword">this</span>);</div><div class="line"><a name="l01535"></a><span class="lineno"> 1535</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l01536"></a><span class="lineno"> 1536</span>  }</div><div class="line"><a name="l01537"></a><span class="lineno"> 1537</span> </div><div class="line"><a name="l01538"></a><span class="lineno"> 1538</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01539"></a><span class="lineno"> 1539</span>  swap(packaged_task& __other) noexcept</div><div class="line"><a name="l01540"></a><span class="lineno"> 1540</span>  { _M_state.swap(__other._M_state); }</div><div class="line"><a name="l01541"></a><span class="lineno"> 1541</span> </div><div class="line"><a name="l01542"></a><span class="lineno"> 1542</span>  <span class="keywordtype">bool</span></div><div class="line"><a name="l01543"></a><span class="lineno"> 1543</span>  valid() <span class="keyword">const</span> noexcept</div><div class="line"><a name="l01544"></a><span class="lineno"> 1544</span>  { <span class="keywordflow">return</span> static_cast<bool>(_M_state); }</div><div class="line"><a name="l01545"></a><span class="lineno"> 1545</span> </div><div class="line"><a name="l01546"></a><span class="lineno"> 1546</span>  <span class="comment">// Result retrieval</span></div><div class="line"><a name="l01547"></a><span class="lineno"> 1547</span>  <a class="code" href="a02232.html">future<_Res></a></div><div class="line"><a name="l01548"></a><span class="lineno"> 1548</span>  get_future()</div><div class="line"><a name="l01549"></a><span class="lineno"> 1549</span>  { <span class="keywordflow">return</span> <a class="code" href="a02232.html">future<_Res></a>(_M_state); }</div><div class="line"><a name="l01550"></a><span class="lineno"> 1550</span> </div><div class="line"><a name="l01551"></a><span class="lineno"> 1551</span>  <span class="comment">// Execution</span></div><div class="line"><a name="l01552"></a><span class="lineno"> 1552</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01553"></a><span class="lineno"> 1553</span>  operator()(_ArgTypes... __args)</div><div class="line"><a name="l01554"></a><span class="lineno"> 1554</span>  {</div><div class="line"><a name="l01555"></a><span class="lineno"> 1555</span>  __future_base::_State_base::_S_check(_M_state);</div><div class="line"><a name="l01556"></a><span class="lineno"> 1556</span>  _M_state->_M_run(std::forward<_ArgTypes>(__args)...);</div><div class="line"><a name="l01557"></a><span class="lineno"> 1557</span>  }</div><div class="line"><a name="l01558"></a><span class="lineno"> 1558</span> </div><div class="line"><a name="l01559"></a><span class="lineno"> 1559</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01560"></a><span class="lineno"> 1560</span>  make_ready_at_thread_exit(_ArgTypes... __args)</div><div class="line"><a name="l01561"></a><span class="lineno"> 1561</span>  {</div><div class="line"><a name="l01562"></a><span class="lineno"> 1562</span>  __future_base::_State_base::_S_check(_M_state);</div><div class="line"><a name="l01563"></a><span class="lineno"> 1563</span>  _M_state->_M_run_delayed(std::forward<_ArgTypes>(__args)..., _M_state);</div><div class="line"><a name="l01564"></a><span class="lineno"> 1564</span>  }</div><div class="line"><a name="l01565"></a><span class="lineno"> 1565</span> </div><div class="line"><a name="l01566"></a><span class="lineno"> 1566</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01567"></a><span class="lineno"> 1567</span>  reset()</div><div class="line"><a name="l01568"></a><span class="lineno"> 1568</span>  {</div><div class="line"><a name="l01569"></a><span class="lineno"> 1569</span>  __future_base::_State_base::_S_check(_M_state);</div><div class="line"><a name="l01570"></a><span class="lineno"> 1570</span>  packaged_task __tmp;</div><div class="line"><a name="l01571"></a><span class="lineno"> 1571</span>  __tmp._M_state = _M_state;</div><div class="line"><a name="l01572"></a><span class="lineno"> 1572</span>  _M_state = _M_state->_M_reset();</div><div class="line"><a name="l01573"></a><span class="lineno"> 1573</span>  }</div><div class="line"><a name="l01574"></a><span class="lineno"> 1574</span>  };</div><div class="line"><a name="l01575"></a><span class="lineno"> 1575</span> <span class="comment"></span></div><div class="line"><a name="l01576"></a><span class="lineno"> 1576</span> <span class="comment"> /// swap</span></div><div class="line"><a name="l01577"></a><span class="lineno"> 1577</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span>... _ArgTypes></div><div class="line"><a name="l01578"></a><span class="lineno"> 1578</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span></div><div class="line"><a name="l01579"></a><span class="lineno"><a class="line" href="a01469.html#ga2700089f8b9371e6aafdb9a7e7a552e7"> 1579</a></span>  swap(packaged_task<_Res(_ArgTypes...)>& __x,</div><div class="line"><a name="l01580"></a><span class="lineno"> 1580</span>  packaged_task<_Res(_ArgTypes...)>& __y) noexcept</div><div class="line"><a name="l01581"></a><span class="lineno"> 1581</span>  { __x.swap(__y); }</div><div class="line"><a name="l01582"></a><span class="lineno"> 1582</span> </div><div class="line"><a name="l01583"></a><span class="lineno"> 1583</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span> _Alloc></div><div class="line"><a name="l01584"></a><span class="lineno"> 1584</span>  <span class="keyword">struct </span>uses_allocator<packaged_task<_Res>, _Alloc></div><div class="line"><a name="l01585"></a><span class="lineno"> 1585</span>  : <span class="keyword">public</span> <a class="code" href="a01476.html#ga6a860513044e23d34e553ea986e83fa1">true_type</a> { };</div><div class="line"><a name="l01586"></a><span class="lineno"> 1586</span> </div><div class="line"><a name="l01587"></a><span class="lineno"> 1587</span> </div><div class="line"><a name="l01588"></a><span class="lineno"> 1588</span>  <span class="comment">// Shared state created by std::async().</span></div><div class="line"><a name="l01589"></a><span class="lineno"> 1589</span>  <span class="comment">// Holds a deferred function and storage for its result.</span></div><div class="line"><a name="l01590"></a><span class="lineno"> 1590</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _BoundFn, <span class="keyword">typename</span> _Res></div><div class="line"><a name="l01591"></a><span class="lineno"> 1591</span>  <span class="keyword">class </span>__future_base::_Deferred_state final</div><div class="line"><a name="l01592"></a><span class="lineno"> 1592</span>  : <span class="keyword">public</span> __future_base::_State_base</div><div class="line"><a name="l01593"></a><span class="lineno"> 1593</span>  {</div><div class="line"><a name="l01594"></a><span class="lineno"> 1594</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l01595"></a><span class="lineno"> 1595</span>  <span class="keyword">explicit</span></div><div class="line"><a name="l01596"></a><span class="lineno"> 1596</span>  _Deferred_state(_BoundFn&& __fn)</div><div class="line"><a name="l01597"></a><span class="lineno"> 1597</span>  : _M_result(new _Result<_Res>()), _M_fn(<a class="code" href="a01538.html">std</a>::move(__fn))</div><div class="line"><a name="l01598"></a><span class="lineno"> 1598</span>  { }</div><div class="line"><a name="l01599"></a><span class="lineno"> 1599</span> </div><div class="line"><a name="l01600"></a><span class="lineno"> 1600</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l01601"></a><span class="lineno"> 1601</span>  <span class="keyword">typedef</span> __future_base::_Ptr<_Result<_Res>> _Ptr_type;</div><div class="line"><a name="l01602"></a><span class="lineno"> 1602</span>  _Ptr_type _M_result;</div><div class="line"><a name="l01603"></a><span class="lineno"> 1603</span>  _BoundFn _M_fn;</div><div class="line"><a name="l01604"></a><span class="lineno"> 1604</span> </div><div class="line"><a name="l01605"></a><span class="lineno"> 1605</span>  <span class="comment">// Run the deferred function.</span></div><div class="line"><a name="l01606"></a><span class="lineno"> 1606</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span></div><div class="line"><a name="l01607"></a><span class="lineno"> 1607</span>  _M_complete_async()</div><div class="line"><a name="l01608"></a><span class="lineno"> 1608</span>  {</div><div class="line"><a name="l01609"></a><span class="lineno"> 1609</span>  <span class="comment">// Multiple threads can call a waiting function on the future and</span></div><div class="line"><a name="l01610"></a><span class="lineno"> 1610</span>  <span class="comment">// reach this point at the same time. The call_once in _M_set_result</span></div><div class="line"><a name="l01611"></a><span class="lineno"> 1611</span>  <span class="comment">// ensures only the first one run the deferred function, stores the</span></div><div class="line"><a name="l01612"></a><span class="lineno"> 1612</span>  <span class="comment">// result in _M_result, swaps that with the base _M_result and makes</span></div><div class="line"><a name="l01613"></a><span class="lineno"> 1613</span>  <span class="comment">// the state ready. Tell _M_set_result to ignore failure so all later</span></div><div class="line"><a name="l01614"></a><span class="lineno"> 1614</span>  <span class="comment">// calls do nothing.</span></div><div class="line"><a name="l01615"></a><span class="lineno"> 1615</span>  _M_set_result(_S_task_setter(_M_result, _M_fn), <span class="keyword">true</span>);</div><div class="line"><a name="l01616"></a><span class="lineno"> 1616</span>  }</div><div class="line"><a name="l01617"></a><span class="lineno"> 1617</span> </div><div class="line"><a name="l01618"></a><span class="lineno"> 1618</span>  <span class="comment">// Caller should check whether the state is ready first, because this</span></div><div class="line"><a name="l01619"></a><span class="lineno"> 1619</span>  <span class="comment">// function will return true even after the deferred function has run.</span></div><div class="line"><a name="l01620"></a><span class="lineno"> 1620</span>  <span class="keyword">virtual</span> <span class="keywordtype">bool</span> _M_is_deferred_future()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <span class="keyword">true</span>; }</div><div class="line"><a name="l01621"></a><span class="lineno"> 1621</span>  };</div><div class="line"><a name="l01622"></a><span class="lineno"> 1622</span> </div><div class="line"><a name="l01623"></a><span class="lineno"> 1623</span>  <span class="comment">// Common functionality hoisted out of the _Async_state_impl template.</span></div><div class="line"><a name="l01624"></a><span class="lineno"> 1624</span>  <span class="keyword">class </span>__future_base::_Async_state_commonV2</div><div class="line"><a name="l01625"></a><span class="lineno"> 1625</span>  : <span class="keyword">public</span> __future_base::_State_base</div><div class="line"><a name="l01626"></a><span class="lineno"> 1626</span>  {</div><div class="line"><a name="l01627"></a><span class="lineno"> 1627</span>  <span class="keyword">protected</span>:</div><div class="line"><a name="l01628"></a><span class="lineno"> 1628</span>  ~_Async_state_commonV2() = <span class="keywordflow">default</span>;</div><div class="line"><a name="l01629"></a><span class="lineno"> 1629</span> </div><div class="line"><a name="l01630"></a><span class="lineno"> 1630</span>  <span class="comment">// Make waiting functions block until the thread completes, as if joined.</span></div><div class="line"><a name="l01631"></a><span class="lineno"> 1631</span>  <span class="comment">//</span></div><div class="line"><a name="l01632"></a><span class="lineno"> 1632</span>  <span class="comment">// This function is used by wait() to satisfy the first requirement below</span></div><div class="line"><a name="l01633"></a><span class="lineno"> 1633</span>  <span class="comment">// and by wait_for() / wait_until() to satisfy the second.</span></div><div class="line"><a name="l01634"></a><span class="lineno"> 1634</span>  <span class="comment">//</span></div><div class="line"><a name="l01635"></a><span class="lineno"> 1635</span>  <span class="comment">// [futures.async]:</span></div><div class="line"><a name="l01636"></a><span class="lineno"> 1636</span>  <span class="comment">//</span></div><div class="line"><a name="l01637"></a><span class="lineno"> 1637</span>  <span class="comment">// — a call to a waiting function on an asynchronous return object that</span></div><div class="line"><a name="l01638"></a><span class="lineno"> 1638</span>  <span class="comment">// shares the shared state created by this async call shall block until</span></div><div class="line"><a name="l01639"></a><span class="lineno"> 1639</span>  <span class="comment">// the associated thread has completed, as if joined, or else time out.</span></div><div class="line"><a name="l01640"></a><span class="lineno"> 1640</span>  <span class="comment">//</span></div><div class="line"><a name="l01641"></a><span class="lineno"> 1641</span>  <span class="comment">// — the associated thread completion synchronizes with the return from</span></div><div class="line"><a name="l01642"></a><span class="lineno"> 1642</span>  <span class="comment">// the first function that successfully detects the ready status of the</span></div><div class="line"><a name="l01643"></a><span class="lineno"> 1643</span>  <span class="comment">// shared state or with the return from the last function that releases</span></div><div class="line"><a name="l01644"></a><span class="lineno"> 1644</span>  <span class="comment">// the shared state, whichever happens first.</span></div><div class="line"><a name="l01645"></a><span class="lineno"> 1645</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span> _M_complete_async() { _M_join(); }</div><div class="line"><a name="l01646"></a><span class="lineno"> 1646</span> </div><div class="line"><a name="l01647"></a><span class="lineno"> 1647</span>  <span class="keywordtype">void</span> _M_join() { <a class="code" href="a01538.html#af3415e3476b6a4ecb873675dd10a0237">std::call_once</a>(_M_once, &thread::join, &_M_thread); }</div><div class="line"><a name="l01648"></a><span class="lineno"> 1648</span> </div><div class="line"><a name="l01649"></a><span class="lineno"> 1649</span>  thread _M_thread;</div><div class="line"><a name="l01650"></a><span class="lineno"> 1650</span>  once_flag _M_once;</div><div class="line"><a name="l01651"></a><span class="lineno"> 1651</span>  };</div><div class="line"><a name="l01652"></a><span class="lineno"> 1652</span> </div><div class="line"><a name="l01653"></a><span class="lineno"> 1653</span>  <span class="comment">// Shared state created by std::async().</span></div><div class="line"><a name="l01654"></a><span class="lineno"> 1654</span>  <span class="comment">// Starts a new thread that runs a function and makes the shared state ready.</span></div><div class="line"><a name="l01655"></a><span class="lineno"> 1655</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _BoundFn, <span class="keyword">typename</span> _Res></div><div class="line"><a name="l01656"></a><span class="lineno"> 1656</span>  <span class="keyword">class </span>__future_base::_Async_state_impl final</div><div class="line"><a name="l01657"></a><span class="lineno"> 1657</span>  : <span class="keyword">public</span> __future_base::_Async_state_commonV2</div><div class="line"><a name="l01658"></a><span class="lineno"> 1658</span>  {</div><div class="line"><a name="l01659"></a><span class="lineno"> 1659</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l01660"></a><span class="lineno"> 1660</span>  <span class="keyword">explicit</span></div><div class="line"><a name="l01661"></a><span class="lineno"> 1661</span>  _Async_state_impl(_BoundFn&& __fn)</div><div class="line"><a name="l01662"></a><span class="lineno"> 1662</span>  : _M_result(new _Result<_Res>()), _M_fn(<a class="code" href="a01538.html">std</a>::move(__fn))</div><div class="line"><a name="l01663"></a><span class="lineno"> 1663</span>  {</div><div class="line"><a name="l01664"></a><span class="lineno"> 1664</span>  _M_thread = <a class="code" href="a02856.html">std::thread</a>{ [<span class="keyword">this</span>] {</div><div class="line"><a name="l01665"></a><span class="lineno"> 1665</span>  __try</div><div class="line"><a name="l01666"></a><span class="lineno"> 1666</span>  {</div><div class="line"><a name="l01667"></a><span class="lineno"> 1667</span>  _M_set_result(_S_task_setter(_M_result, _M_fn));</div><div class="line"><a name="l01668"></a><span class="lineno"> 1668</span>  }</div><div class="line"><a name="l01669"></a><span class="lineno"> 1669</span>  __catch (<span class="keyword">const</span> <a class="code" href="a05332.html">__cxxabiv1::__forced_unwind</a>&)</div><div class="line"><a name="l01670"></a><span class="lineno"> 1670</span>  {</div><div class="line"><a name="l01671"></a><span class="lineno"> 1671</span>  <span class="comment">// make the shared state ready on thread cancellation</span></div><div class="line"><a name="l01672"></a><span class="lineno"> 1672</span>  <span class="keywordflow">if</span> (static_cast<bool>(_M_result))</div><div class="line"><a name="l01673"></a><span class="lineno"> 1673</span>  this->_M_break_promise(std::move(_M_result));</div><div class="line"><a name="l01674"></a><span class="lineno"> 1674</span>  __throw_exception_again;</div><div class="line"><a name="l01675"></a><span class="lineno"> 1675</span>  }</div><div class="line"><a name="l01676"></a><span class="lineno"> 1676</span>  } };</div><div class="line"><a name="l01677"></a><span class="lineno"> 1677</span>  }</div><div class="line"><a name="l01678"></a><span class="lineno"> 1678</span> </div><div class="line"><a name="l01679"></a><span class="lineno"> 1679</span>  <span class="comment">// Must not destroy _M_result and _M_fn until the thread finishes.</span></div><div class="line"><a name="l01680"></a><span class="lineno"> 1680</span>  <span class="comment">// Call join() directly rather than through _M_join() because no other</span></div><div class="line"><a name="l01681"></a><span class="lineno"> 1681</span>  <span class="comment">// thread can be referring to this state if it is being destroyed.</span></div><div class="line"><a name="l01682"></a><span class="lineno"> 1682</span>  ~_Async_state_impl() { <span class="keywordflow">if</span> (_M_thread.joinable()) _M_thread.join(); }</div><div class="line"><a name="l01683"></a><span class="lineno"> 1683</span> </div><div class="line"><a name="l01684"></a><span class="lineno"> 1684</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l01685"></a><span class="lineno"> 1685</span>  <span class="keyword">typedef</span> __future_base::_Ptr<_Result<_Res>> _Ptr_type;</div><div class="line"><a name="l01686"></a><span class="lineno"> 1686</span>  _Ptr_type _M_result;</div><div class="line"><a name="l01687"></a><span class="lineno"> 1687</span>  _BoundFn _M_fn;</div><div class="line"><a name="l01688"></a><span class="lineno"> 1688</span>  };</div><div class="line"><a name="l01689"></a><span class="lineno"> 1689</span> </div><div class="line"><a name="l01690"></a><span class="lineno"> 1690</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _BoundFn></div><div class="line"><a name="l01691"></a><span class="lineno"> 1691</span>  <span class="keyword">inline</span> <a class="code" href="a06848.html">std::shared_ptr<__future_base::_State_base></a></div><div class="line"><a name="l01692"></a><span class="lineno"> 1692</span>  __future_base::_S_make_deferred_state(_BoundFn&& __fn)</div><div class="line"><a name="l01693"></a><span class="lineno"> 1693</span>  {</div><div class="line"><a name="l01694"></a><span class="lineno"> 1694</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> remove_reference<_BoundFn>::type __fn_type;</div><div class="line"><a name="l01695"></a><span class="lineno"> 1695</span>  <span class="keyword">typedef</span> _Deferred_state<__fn_type> __state_type;</div><div class="line"><a name="l01696"></a><span class="lineno"> 1696</span>  <span class="keywordflow">return</span> std::make_shared<__state_type>(std::move(__fn));</div><div class="line"><a name="l01697"></a><span class="lineno"> 1697</span>  }</div><div class="line"><a name="l01698"></a><span class="lineno"> 1698</span> </div><div class="line"><a name="l01699"></a><span class="lineno"> 1699</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _BoundFn></div><div class="line"><a name="l01700"></a><span class="lineno"> 1700</span>  <span class="keyword">inline</span> <a class="code" href="a06848.html">std::shared_ptr<__future_base::_State_base></a></div><div class="line"><a name="l01701"></a><span class="lineno"> 1701</span>  __future_base::_S_make_async_state(_BoundFn&& __fn)</div><div class="line"><a name="l01702"></a><span class="lineno"> 1702</span>  {</div><div class="line"><a name="l01703"></a><span class="lineno"> 1703</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> remove_reference<_BoundFn>::type __fn_type;</div><div class="line"><a name="l01704"></a><span class="lineno"> 1704</span>  <span class="keyword">typedef</span> _Async_state_impl<__fn_type> __state_type;</div><div class="line"><a name="l01705"></a><span class="lineno"> 1705</span>  <span class="keywordflow">return</span> std::make_shared<__state_type>(std::move(__fn));</div><div class="line"><a name="l01706"></a><span class="lineno"> 1706</span>  }</div><div class="line"><a name="l01707"></a><span class="lineno"> 1707</span> </div><div class="line"><a name="l01708"></a><span class="lineno"> 1708</span> <span class="comment"></span></div><div class="line"><a name="l01709"></a><span class="lineno"> 1709</span> <span class="comment"> /// async</span></div><div class="line"><a name="l01710"></a><span class="lineno"> 1710</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Fn, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l01711"></a><span class="lineno"> 1711</span>  future<__async_result_of<_Fn, _Args...>></div><div class="line"><a name="l01712"></a><span class="lineno"><a class="line" href="a01469.html#gae1d80ff37cef48666bea37bcff54f6da"> 1712</a></span>  async(<a class="code" href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">launch</a> __policy, _Fn&& __fn, _Args&&... __args)</div><div class="line"><a name="l01713"></a><span class="lineno"> 1713</span>  {</div><div class="line"><a name="l01714"></a><span class="lineno"> 1714</span>  <a class="code" href="a06848.html">std::shared_ptr<__future_base::_State_base></a> __state;</div><div class="line"><a name="l01715"></a><span class="lineno"> 1715</span>  <span class="keywordflow">if</span> ((__policy & launch::async) == launch::async)</div><div class="line"><a name="l01716"></a><span class="lineno"> 1716</span>  {</div><div class="line"><a name="l01717"></a><span class="lineno"> 1717</span>  __try</div><div class="line"><a name="l01718"></a><span class="lineno"> 1718</span>  {</div><div class="line"><a name="l01719"></a><span class="lineno"> 1719</span>  __state = __future_base::_S_make_async_state(</div><div class="line"><a name="l01720"></a><span class="lineno"> 1720</span>  std::thread::__make_invoker(std::forward<_Fn>(__fn),</div><div class="line"><a name="l01721"></a><span class="lineno"> 1721</span>  std::forward<_Args>(__args)...)</div><div class="line"><a name="l01722"></a><span class="lineno"> 1722</span>  );</div><div class="line"><a name="l01723"></a><span class="lineno"> 1723</span>  }</div><div class="line"><a name="l01724"></a><span class="lineno"> 1724</span> <span class="preprocessor">#if __cpp_exceptions</span></div><div class="line"><a name="l01725"></a><span class="lineno"> 1725</span>  <span class="keywordflow">catch</span>(<span class="keyword">const</span> <a class="code" href="a02848.html">system_error</a>& __e)</div><div class="line"><a name="l01726"></a><span class="lineno"> 1726</span>  {</div><div class="line"><a name="l01727"></a><span class="lineno"> 1727</span>  <span class="keywordflow">if</span> (__e.code() != errc::resource_unavailable_try_again</div><div class="line"><a name="l01728"></a><span class="lineno"> 1728</span>  || (__policy & launch::deferred) != launch::deferred)</div><div class="line"><a name="l01729"></a><span class="lineno"> 1729</span>  <span class="keywordflow">throw</span>;</div><div class="line"><a name="l01730"></a><span class="lineno"> 1730</span>  }</div><div class="line"><a name="l01731"></a><span class="lineno"> 1731</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l01732"></a><span class="lineno"> 1732</span>  }</div><div class="line"><a name="l01733"></a><span class="lineno"> 1733</span>  <span class="keywordflow">if</span> (!__state)</div><div class="line"><a name="l01734"></a><span class="lineno"> 1734</span>  {</div><div class="line"><a name="l01735"></a><span class="lineno"> 1735</span>  __state = __future_base::_S_make_deferred_state(</div><div class="line"><a name="l01736"></a><span class="lineno"> 1736</span>  std::thread::__make_invoker(std::forward<_Fn>(__fn),</div><div class="line"><a name="l01737"></a><span class="lineno"> 1737</span>  std::forward<_Args>(__args)...));</div><div class="line"><a name="l01738"></a><span class="lineno"> 1738</span>  }</div><div class="line"><a name="l01739"></a><span class="lineno"> 1739</span>  <span class="keywordflow">return</span> <a class="code" href="a02232.html">future</a><__async_result_of<_Fn, _Args...>>(__state);</div><div class="line"><a name="l01740"></a><span class="lineno"> 1740</span>  }</div><div class="line"><a name="l01741"></a><span class="lineno"> 1741</span> <span class="comment"></span></div><div class="line"><a name="l01742"></a><span class="lineno"> 1742</span> <span class="comment"> /// async, potential overload</span></div><div class="line"><a name="l01743"></a><span class="lineno"> 1743</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Fn, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l01744"></a><span class="lineno"> 1744</span>  <span class="keyword">inline</span> future<__async_result_of<_Fn, _Args...>></div><div class="line"><a name="l01745"></a><span class="lineno"><a class="line" href="a01469.html#gad61c88630f1705f6be0b8ba6cc832d6a"> 1745</a></span>  async(_Fn&& __fn, _Args&&... __args)</div><div class="line"><a name="l01746"></a><span class="lineno"> 1746</span>  {</div><div class="line"><a name="l01747"></a><span class="lineno"> 1747</span>  <span class="keywordflow">return</span> <a class="code" href="a01469.html#gad61c88630f1705f6be0b8ba6cc832d6a">std::async</a>(launch::async|launch::deferred,</div><div class="line"><a name="l01748"></a><span class="lineno"> 1748</span>  std::forward<_Fn>(__fn),</div><div class="line"><a name="l01749"></a><span class="lineno"> 1749</span>  std::forward<_Args>(__args)...);</div><div class="line"><a name="l01750"></a><span class="lineno"> 1750</span>  }</div><div class="line"><a name="l01751"></a><span class="lineno"> 1751</span> </div><div class="line"><a name="l01752"></a><span class="lineno"> 1752</span> <span class="preprocessor">#endif // _GLIBCXX_ASYNC_ABI_COMPAT</span></div><div class="line"><a name="l01753"></a><span class="lineno"> 1753</span> <span class="preprocessor">#endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1</span></div><div class="line"><a name="l01754"></a><span class="lineno"> 1754</span> </div><div class="line"><a name="l01755"></a><span class="lineno"> 1755</span>  <span class="comment">// @} group futures</span></div><div class="line"><a name="l01756"></a><span class="lineno"> 1756</span> _GLIBCXX_END_NAMESPACE_VERSION</div><div class="line"><a name="l01757"></a><span class="lineno"> 1757</span> } <span class="comment">// namespace</span></div><div class="line"><a name="l01758"></a><span class="lineno"> 1758</span> </div><div class="line"><a name="l01759"></a><span class="lineno"> 1759</span> <span class="preprocessor">#endif // C++11</span></div><div class="line"><a name="l01760"></a><span class="lineno"> 1760</span> </div><div class="line"><a name="l01761"></a><span class="lineno"> 1761</span> <span class="preprocessor">#endif // _GLIBCXX_FUTURE</span></div><div class="ttc" id="a02352_html_abf5c5217a5d88d363cf2b0c09b44b4a0"><div class="ttname"><a href="a02352.html#abf5c5217a5d88d363cf2b0c09b44b4a0">std::shared_future< _Res & >::shared_future</a></div><div class="ttdeci">shared_future(const shared_future &__sf)</div><div class="ttdoc">Copy constructor.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00938">future:938</a></div></div>
<div class="ttc" id="a01828_html"><div class="ttname"><a href="a01828.html">std::chrono::duration</a></div><div class="ttdoc">duration</div><div class="ttdef"><b>Definition:</b> <a href="a00050_source.html#l00064">chrono:64</a></div></div>
<div class="ttc" id="a01016_html"><div class="ttname"><a href="a01016.html">aligned_buffer.h</a></div></div>
<div class="ttc" id="a04704_html"><div class="ttname"><a href="a04704.html">std::allocator</a></div><div class="ttdoc">The standard allocator, as per [20.4].</div><div class="ttdef"><b>Definition:</b> <a href="a00272_source.html#l00108">allocator.h:108</a></div></div>
<div class="ttc" id="a02228_html"><div class="ttname"><a href="a02228.html">std::future_error</a></div><div class="ttdoc">Exception type thrown by futures.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00096">future:96</a></div></div>
<div class="ttc" id="a00110_html"><div class="ttname"><a href="a00110.html">mutex</a></div></div>
<div class="ttc" id="a07084_html"><div class="ttname"><a href="a07084.html">std::__is_location_invariant</a></div><div class="ttdef"><b>Definition:</b> <a href="a00521_source.html#l00071">std_function.h:71</a></div></div>
<div class="ttc" id="a01469_html_ga6f4ad125d364f01560e2ed20a3c8bb5b"><div class="ttname"><a href="a01469.html#ga6f4ad125d364f01560e2ed20a3c8bb5b">std::launch</a></div><div class="ttdeci">launch</div><div class="ttdoc">Launch code for futures.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00137">future:137</a></div></div>
<div class="ttc" id="a02344_html_a290550ce931d18ccad7d296e4875ddb3"><div class="ttname"><a href="a02344.html#a290550ce931d18ccad7d296e4875ddb3">std::future< _Res & >::future</a></div><div class="ttdeci">future(future &&__uf) noexcept</div><div class="ttdoc">Move constructor.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00822">future:822</a></div></div>
<div class="ttc" id="a00356_html"><div class="ttname"><a href="a00356.html">functexcept.h</a></div></div>
<div class="ttc" id="a02336_html_a71d62e5218e561c5c4507eb3e7f70474"><div class="ttname"><a href="a02336.html#a71d62e5218e561c5c4507eb3e7f70474">std::__basic_future::_M_get_result</a></div><div class="ttdeci">__result_type _M_get_result() const</div><div class="ttdoc">Wait for the state to be ready and rethrow any stored exception.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00714">future:714</a></div></div>
<div class="ttc" id="a00044_html"><div class="ttname"><a href="a00044.html">atomic</a></div></div>
<div class="ttc" id="a02348_html"><div class="ttname"><a href="a02348.html">std::future< void ></a></div><div class="ttdoc">Explicit specialization for future<void></div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00847">future:847</a></div></div>
<div class="ttc" id="a02248_html"><div class="ttname"><a href="a02248.html">std::__future_base</a></div><div class="ttdoc">Base class and enclosing scope.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00198">future:198</a></div></div>
<div class="ttc" id="a02848_html"><div class="ttname"><a href="a02848.html">std::system_error</a></div><div class="ttdoc">Thrown to indicate error code of underlying system.</div><div class="ttdef"><b>Definition:</b> <a href="a00155_source.html#l00341">system_error:341</a></div></div>
<div class="ttc" id="a01472_html_ga84894e14d771a93b933577b3f8f191cc"><div class="ttname"><a href="a01472.html#ga84894e14d771a93b933577b3f8f191cc">std::allocate_shared</a></div><div class="ttdeci">shared_ptr< _Tp > allocate_shared(const _Alloc &__a, _Args &&... __args)</div><div class="ttdoc">Create an object that is owned by a shared_ptr.</div><div class="ttdef"><b>Definition:</b> <a href="a17109_source.html#l00703">bits/shared_ptr.h:703</a></div></div>
<div class="ttc" id="a02336_html"><div class="ttname"><a href="a02336.html">std::__basic_future</a></div><div class="ttdoc">Common implementation for future and shared_future.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00671">future:671</a></div></div>
<div class="ttc" id="a02236_html"><div class="ttname"><a href="a02236.html">std::shared_future</a></div><div class="ttdoc">Primary template for shared_future.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00128">future:128</a></div></div>
<div class="ttc" id="a02352_html_a6326dd904d9cfb96a6505ade6e9d02dc"><div class="ttname"><a href="a02352.html#a6326dd904d9cfb96a6505ade6e9d02dc">std::shared_future< _Res & >::shared_future</a></div><div class="ttdeci">shared_future(future< _Res & > &&__uf) noexcept</div><div class="ttdoc">Construct from a future rvalue.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00941">future:941</a></div></div>
<div class="ttc" id="a00059_html"><div class="ttname"><a href="a00059.html">condition_variable</a></div></div>
<div class="ttc" id="a02324_html"><div class="ttname"><a href="a02324.html">std::__future_base::_Result< void ></a></div><div class="ttdoc">Explicit specialization for void.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00647">future:647</a></div></div>
<div class="ttc" id="a01472_html_ga1f3ad1c876ee5b203367e06d74fe0bf2"><div class="ttname"><a href="a01472.html#ga1f3ad1c876ee5b203367e06d74fe0bf2">std::make_shared</a></div><div class="ttdeci">shared_ptr< _Tp > make_shared(_Args &&... __args)</div><div class="ttdoc">Create an object that is owned by a shared_ptr.</div><div class="ttdef"><b>Definition:</b> <a href="a17109_source.html#l00718">bits/shared_ptr.h:718</a></div></div>
<div class="ttc" id="a01469_html_gae1d80ff37cef48666bea37bcff54f6da"><div class="ttname"><a href="a01469.html#gae1d80ff37cef48666bea37bcff54f6da">std::async</a></div><div class="ttdeci">future< __async_result_of< _Fn, _Args... > > async(launch __policy, _Fn &&__fn, _Args &&... __args)</div><div class="ttdoc">async</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l01712">future:1712</a></div></div>
<div class="ttc" id="a02356_html"><div class="ttname"><a href="a02356.html">std::shared_future< void ></a></div><div class="ttdoc">Explicit specialization for shared_future<void></div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00969">future:969</a></div></div>
<div class="ttc" id="a02856_html"><div class="ttname"><a href="a02856.html">std::thread</a></div><div class="ttdoc">thread</div><div class="ttdef"><b>Definition:</b> <a href="a00158_source.html#l00062">thread:62</a></div></div>
<div class="ttc" id="a00521_html"><div class="ttname"><a href="a00521.html">std_function.h</a></div></div>
<div class="ttc" id="a02344_html"><div class="ttname"><a href="a02344.html">std::future< _Res & ></a></div><div class="ttdoc">Partial specialization for future<R&></div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00804">future:804</a></div></div>
<div class="ttc" id="a02244_html"><div class="ttname"><a href="a02244.html">std::promise</a></div><div class="ttdoc">Primary template for promise.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00134">future:134</a></div></div>
<div class="ttc" id="a02844_html"><div class="ttname"><a href="a02844.html">std::error_condition</a></div><div class="ttdoc">error_condition</div><div class="ttdef"><b>Definition:</b> <a href="a00155_source.html#l00224">system_error:224</a></div></div>
<div class="ttc" id="a08012_html"><div class="ttname"><a href="a08012.html">std::allocator_arg_t</a></div><div class="ttdoc">[allocator.tag]</div><div class="ttdef"><b>Definition:</b> <a href="a00629_source.html#l00046">uses_allocator.h:46</a></div></div>
<div class="ttc" id="a02352_html_a07561897cc476a3a01878bd17cf1eb75"><div class="ttname"><a href="a02352.html#a07561897cc476a3a01878bd17cf1eb75">std::shared_future< _Res & >::get</a></div><div class="ttdeci">_Res & get() const</div><div class="ttdoc">Retrieving the value.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00964">future:964</a></div></div>
<div class="ttc" id="a00155_html"><div class="ttname"><a href="a00155.html">system_error</a></div></div>
<div class="ttc" id="a01538_html_af3415e3476b6a4ecb873675dd10a0237"><div class="ttname"><a href="a01538.html#af3415e3476b6a4ecb873675dd10a0237">std::call_once</a></div><div class="ttdeci">void call_once(once_flag &__once, _Callable &&__f, _Args &&... __args)</div><div class="ttdoc">call_once</div><div class="ttdef"><b>Definition:</b> <a href="a00110_source.html#l00667">mutex:667</a></div></div>
<div class="ttc" id="a01538_html_a37b7f9acb3d4f471410857a524425f03"><div class="ttname"><a href="a01538.html#a37b7f9acb3d4f471410857a524425f03">std::operator|</a></div><div class="ttdeci">bitset< _Nb > operator|(const bitset< _Nb > &__x, const bitset< _Nb > &__y) noexcept</div><div class="ttdoc">Global bitwise operations on bitsets.</div><div class="ttdef"><b>Definition:</b> <a href="a00047_source.html#l01438">bitset:1438</a></div></div>
<div class="ttc" id="a02264_html"><div class="ttname"><a href="a02264.html">std::__future_base::_Result_alloc</a></div><div class="ttdoc">A result object that uses an allocator.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00268">future:268</a></div></div>
<div class="ttc" id="a00299_html"><div class="ttname"><a href="a00299.html">c++0x_warning.h</a></div></div>
<div class="ttc" id="a01538_html_a0eec0ec1834b05e931022533e2ae4d03"><div class="ttname"><a href="a01538.html#a0eec0ec1834b05e931022533e2ae4d03">std::operator^</a></div><div class="ttdeci">bitset< _Nb > operator^(const bitset< _Nb > &__x, const bitset< _Nb > &__y) noexcept</div><div class="ttdoc">Global bitwise operations on bitsets.</div><div class="ttdef"><b>Definition:</b> <a href="a00047_source.html#l01447">bitset:1447</a></div></div>
<div class="ttc" id="a01477_html_ga1954d5552e24586051011312041033f6"><div class="ttname"><a href="a01477.html#ga1954d5552e24586051011312041033f6">std::__addressof</a></div><div class="ttdeci">constexpr _Tp * __addressof(_Tp &__r) noexcept</div><div class="ttdoc">Same as C++11 std::addressof.</div><div class="ttdef"><b>Definition:</b> <a href="a00422_source.html#l00047">move.h:47</a></div></div>
<div class="ttc" id="a02228_html_a95833ed17fb6f056709e29abdc50f50c"><div class="ttname"><a href="a02228.html#a95833ed17fb6f056709e29abdc50f50c">std::future_error::what</a></div><div class="ttdeci">virtual const char * what() const noexcept</div></div>
<div class="ttc" id="a05332_html"><div class="ttname"><a href="a05332.html">__cxxabiv1::__forced_unwind</a></div><div class="ttdoc">Thrown as part of forced unwinding.A magic placeholder class that can be caught by reference to recog...</div><div class="ttdef"><b>Definition:</b> <a href="a00314_source.html#l00048">cxxabi_forced.h:48</a></div></div>
<div class="ttc" id="a01477_html_gacb5baec338e12b99cb6bddea7506c7c6"><div class="ttname"><a href="a01477.html#gacb5baec338e12b99cb6bddea7506c7c6">std::forward</a></div><div class="ttdeci">constexpr _Tp && forward(typename std::remove_reference< _Tp >::type &__t) noexcept</div><div class="ttdoc">Forward an lvalue.</div><div class="ttdef"><b>Definition:</b> <a href="a00422_source.html#l00074">move.h:74</a></div></div>
<div class="ttc" id="a02784_html_a48e6f223bbd547dcea0d5efdb54b4951"><div class="ttname"><a href="a02784.html#a48e6f223bbd547dcea0d5efdb54b4951">std::logic_error::logic_error</a></div><div class="ttdeci">logic_error(const string &__arg) _GLIBCXX_TXN_SAFE</div></div>
<div class="ttc" id="a02784_html"><div class="ttname"><a href="a02784.html">std::logic_error</a></div><div class="ttdoc">One of two subclasses of exception.</div><div class="ttdef"><b>Definition:</b> <a href="a00146_source.html#l00113">stdexcept:113</a></div></div>
<div class="ttc" id="a01469_html_ga61938f7ac25df97b5362109e61bb46a6"><div class="ttname"><a href="a01469.html#ga61938f7ac25df97b5362109e61bb46a6">std::future_errc</a></div><div class="ttdeci">future_errc</div><div class="ttdoc">Error code for futures.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00066">future:66</a></div></div>
<div class="ttc" id="a01538_html_a1fa3f7679aec1619e37fddf24eb70a11"><div class="ttname"><a href="a01538.html#a1fa3f7679aec1619e37fddf24eb70a11">std::__allocate_guarded</a></div><div class="ttdeci">__allocated_ptr< _Alloc > __allocate_guarded(_Alloc &__a)</div><div class="ttdoc">Allocate space for a single object using __a.</div><div class="ttdef"><b>Definition:</b> <a href="a00269_source.html#l00095">allocated_ptr.h:95</a></div></div>
<div class="ttc" id="a01486_html_ga64d0b68338d7edbfd7d95f4177dbc442"><div class="ttname"><a href="a01486.html#ga64d0b68338d7edbfd7d95f4177dbc442">std::rethrow_exception</a></div><div class="ttdeci">void rethrow_exception(exception_ptr) __attribute__((__noreturn__))</div><div class="ttdoc">Throw the object pointed to by the exception_ptr.</div></div>
<div class="ttc" id="a01469_html_ga2700089f8b9371e6aafdb9a7e7a552e7"><div class="ttname"><a href="a01469.html#ga2700089f8b9371e6aafdb9a7e7a552e7">std::swap</a></div><div class="ttdeci">void swap(packaged_task< _Res(_ArgTypes...)> &__x, packaged_task< _Res(_ArgTypes...)> &__y) noexcept</div><div class="ttdoc">swap</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l01579">future:1579</a></div></div>
<div class="ttc" id="a01476_html_ga6a860513044e23d34e553ea986e83fa1"><div class="ttname"><a href="a01476.html#ga6a860513044e23d34e553ea986e83fa1">std::true_type</a></div><div class="ttdeci">integral_constant< bool, true > true_type</div><div class="ttdoc">The type used as a compile-time boolean with true value.</div><div class="ttdef"><b>Definition:</b> <a href="a00167_source.html#l00075">type_traits:75</a></div></div>
<div class="ttc" id="a00158_html"><div class="ttname"><a href="a00158.html">thread</a></div></div>
<div class="ttc" id="a02348_html_a22b2cb90803ba2cae78dafa81ba278d6"><div class="ttname"><a href="a02348.html#a22b2cb90803ba2cae78dafa81ba278d6">std::future< void >::get</a></div><div class="ttdeci">void get()</div><div class="ttdoc">Retrieving the value.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00879">future:879</a></div></div>
<div class="ttc" id="a01538_html"><div class="ttname"><a href="a01538.html">std</a></div><div class="ttdoc">ISO C++ entities toplevel namespace is std.</div></div>
<div class="ttc" id="a00620_html"><div class="ttname"><a href="a00620.html">unique_ptr.h</a></div></div>
<div class="ttc" id="a02236_html_a7abac9b976a7f293a80951ddc77c61a9"><div class="ttname"><a href="a02236.html#a7abac9b976a7f293a80951ddc77c61a9">std::shared_future::shared_future</a></div><div class="ttdeci">shared_future(const shared_future &__sf) noexcept</div><div class="ttdoc">Copy constructor.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00899">future:899</a></div></div>
<div class="ttc" id="a02356_html_ad2689035011932d007e07c10e1e48d47"><div class="ttname"><a href="a02356.html#ad2689035011932d007e07c10e1e48d47">std::shared_future< void >::shared_future</a></div><div class="ttdeci">shared_future(shared_future &&__sf) noexcept</div><div class="ttdoc">Construct from a shared_future rvalue.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00985">future:985</a></div></div>
<div class="ttc" id="a02232_html_a47c11429633480bddbb965a5f79ab410"><div class="ttname"><a href="a02232.html#a47c11429633480bddbb965a5f79ab410">std::future::future</a></div><div class="ttdeci">future(future &&__uf) noexcept</div><div class="ttdoc">Move constructor.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00779">future:779</a></div></div>
<div class="ttc" id="a00278_html"><div class="ttname"><a href="a00278.html">atomic_futex.h</a></div></div>
<div class="ttc" id="a02236_html_aa1f48e4ac60e93f1eccaf5c4992e5af9"><div class="ttname"><a href="a02236.html#aa1f48e4ac60e93f1eccaf5c4992e5af9">std::shared_future::shared_future</a></div><div class="ttdeci">shared_future(future< _Res > &&__uf) noexcept</div><div class="ttdoc">Construct from a future rvalue.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00902">future:902</a></div></div>
<div class="ttc" id="a02352_html_ae6d05bb66171df7a69ccbcf3d0a14059"><div class="ttname"><a href="a02352.html#ae6d05bb66171df7a69ccbcf3d0a14059">std::shared_future< _Res & >::shared_future</a></div><div class="ttdeci">shared_future(shared_future &&__sf) noexcept</div><div class="ttdoc">Construct from a shared_future rvalue.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00946">future:946</a></div></div>
<div class="ttc" id="a05428_html"><div class="ttname"><a href="a05428.html">std::__exception_ptr::exception_ptr</a></div><div class="ttdoc">An opaque pointer to an arbitrary exception.</div><div class="ttdef"><b>Definition:</b> <a href="a00332_source.html#l00079">exception_ptr.h:79</a></div></div>
<div class="ttc" id="a01477_html_ga5f5136396a5ab3c02543bb01d4364f40"><div class="ttname"><a href="a01477.html#ga5f5136396a5ab3c02543bb01d4364f40">std::__invoke</a></div><div class="ttdeci">constexpr __invoke_result< _Callable, _Args... >::type __invoke(_Callable &&__fn, _Args &&... __args) noexcept(__is_nothrow_invocable< _Callable, _Args... >::value)</div><div class="ttdoc">Invoke a callable object.</div><div class="ttdef"><b>Definition:</b> <a href="a00380_source.html#l00089">invoke.h:89</a></div></div>
<div class="ttc" id="a01832_html"><div class="ttname"><a href="a01832.html">std::chrono::time_point< _Clock, _Duration ></a></div></div>
<div class="ttc" id="a00269_html"><div class="ttname"><a href="a00269.html">allocated_ptr.h</a></div></div>
<div class="ttc" id="a01469_html_ga528eb8f3b350394c0406d4d58ab7dbf4"><div class="ttname"><a href="a01469.html#ga528eb8f3b350394c0406d4d58ab7dbf4">std::future_status</a></div><div class="ttdeci">future_status</div><div class="ttdoc">Status code for futures.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00174">future:174</a></div></div>
<div class="ttc" id="a02232_html"><div class="ttname"><a href="a02232.html">std::future</a></div><div class="ttdoc">Primary template for future.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00125">future:125</a></div></div>
<div class="ttc" id="a02320_html"><div class="ttname"><a href="a02320.html">std::__future_base::_Result< _Res & ></a></div><div class="ttdoc">Partial specialization for reference types.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00627">future:627</a></div></div>
<div class="ttc" id="a02820_html"><div class="ttname"><a href="a02820.html">std::is_error_code_enum</a></div><div class="ttdoc">is_error_code_enum</div><div class="ttdef"><b>Definition:</b> <a href="a00155_source.html#l00053">system_error:53</a></div></div>
<div class="ttc" id="a03040_html"><div class="ttname"><a href="a03040.html">std::integral_constant</a></div><div class="ttdoc">integral_constant</div><div class="ttdef"><b>Definition:</b> <a href="a00167_source.html#l00057">type_traits:57</a></div></div>
<div class="ttc" id="a02232_html_ad340dd48cf99967cf53809024cbe9db1"><div class="ttname"><a href="a02232.html#ad340dd48cf99967cf53809024cbe9db1">std::future::get</a></div><div class="ttdeci">_Res get()</div><div class="ttdoc">Retrieving the value.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00793">future:793</a></div></div>
<div class="ttc" id="a02236_html_a5684fd5dd1daebc3b81737fbc6d60390"><div class="ttname"><a href="a02236.html#a5684fd5dd1daebc3b81737fbc6d60390">std::shared_future::get</a></div><div class="ttdeci">const _Res & get() const</div><div class="ttdoc">Retrieving the value.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00925">future:925</a></div></div>
<div class="ttc" id="a06848_html"><div class="ttname"><a href="a06848.html">std::shared_ptr< _State_base ></a></div></div>
<div class="ttc" id="a02352_html"><div class="ttname"><a href="a02352.html">std::shared_future< _Res & ></a></div><div class="ttdoc">Partial specialization for shared_future<R&></div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00930">future:930</a></div></div>
<div class="ttc" id="a02344_html_a02dd6ce87e29a3baadfc1061430df774"><div class="ttname"><a href="a02344.html#a02dd6ce87e29a3baadfc1061430df774">std::future< _Res & >::get</a></div><div class="ttdeci">_Res & get()</div><div class="ttdoc">Retrieving the value.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00836">future:836</a></div></div>
<div class="ttc" id="a02252_html"><div class="ttname"><a href="a02252.html">std::__future_base::_Result_base</a></div><div class="ttdoc">Base class for results.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00201">future:201</a></div></div>
<div class="ttc" id="a02356_html_a98919d50a2faca6306005a458236176f"><div class="ttname"><a href="a02356.html#a98919d50a2faca6306005a458236176f">std::shared_future< void >::shared_future</a></div><div class="ttdeci">shared_future(future< void > &&__uf) noexcept</div><div class="ttdoc">Construct from a future rvalue.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00980">future:980</a></div></div>
<div class="ttc" id="a02840_html"><div class="ttname"><a href="a02840.html">std::error_code</a></div><div class="ttdoc">error_code</div><div class="ttdef"><b>Definition:</b> <a href="a00155_source.html#l00146">system_error:146</a></div></div>
<div class="ttc" id="a01469_html_gad61c88630f1705f6be0b8ba6cc832d6a"><div class="ttname"><a href="a01469.html#gad61c88630f1705f6be0b8ba6cc832d6a">std::async</a></div><div class="ttdeci">future< __async_result_of< _Fn, _Args... > > async(_Fn &&__fn, _Args &&... __args)</div><div class="ttdoc">async, potential overload</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l01745">future:1745</a></div></div>
<div class="ttc" id="a02356_html_ad638460091d07d1688a8fdb974acacc5"><div class="ttname"><a href="a02356.html#ad638460091d07d1688a8fdb974acacc5">std::shared_future< void >::shared_future</a></div><div class="ttdeci">shared_future(const shared_future &__sf)</div><div class="ttdoc">Copy constructor.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00977">future:977</a></div></div>
<div class="ttc" id="a00380_html"><div class="ttname"><a href="a00380.html">invoke.h</a></div></div>
<div class="ttc" id="a02348_html_a8d804ed9d3fb0818d7d4af8197cc00a7"><div class="ttname"><a href="a02348.html#a8d804ed9d3fb0818d7d4af8197cc00a7">std::future< void >::future</a></div><div class="ttdeci">future(future &&__uf) noexcept</div><div class="ttdoc">Move constructor.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00865">future:865</a></div></div>
<div class="ttc" id="a01486_html_ga02cdcc517fefe661313437aa9356a28f"><div class="ttname"><a href="a01486.html#ga02cdcc517fefe661313437aa9356a28f">std::current_exception</a></div><div class="ttdeci">exception_ptr current_exception() noexcept</div></div>
<div class="ttc" id="a01477_html_gafffcfc895d2cfa7c934ec045e884faec"><div class="ttname"><a href="a01477.html#gafffcfc895d2cfa7c934ec045e884faec">std::addressof</a></div><div class="ttdeci">_GLIBCXX17_CONSTEXPR _Tp * addressof(_Tp &__r) noexcept</div><div class="ttdoc">Returns the actual address of the object or function referenced by r, even in the presence of an over...</div><div class="ttdef"><b>Definition:</b> <a href="a00422_source.html#l00138">move.h:138</a></div></div>
<div class="ttc" id="a02236_html_a39eb67ba5bfeda967888f6f8fafd0de8"><div class="ttname"><a href="a02236.html#a39eb67ba5bfeda967888f6f8fafd0de8">std::shared_future::shared_future</a></div><div class="ttdeci">shared_future(shared_future &&__sf) noexcept</div><div class="ttdoc">Construct from a shared_future rvalue.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00907">future:907</a></div></div>
<div class="ttc" id="a01469_html_ga5b4abfa468beb197d5bdac89e20afdb0"><div class="ttname"><a href="a01469.html#ga5b4abfa468beb197d5bdac89e20afdb0">std::future_category</a></div><div class="ttdeci">const error_category & future_category() noexcept</div><div class="ttdoc">Points to a statically-allocated object derived from error_category.</div></div>
<div class="ttc" id="a07964_html_a20128902c397043453a90db55f4ea276"><div class="ttname"><a href="a07964.html#a20128902c397043453a90db55f4ea276">std::unique_ptr::swap</a></div><div class="ttdeci">void swap(unique_ptr &__u) noexcept</div><div class="ttdoc">Exchange the pointer and deleter with another object.</div><div class="ttdef"><b>Definition:</b> <a href="a00620_source.html#l00382">unique_ptr.h:382</a></div></div>
<div class="ttc" id="a01538_html_a7e7330f9af270f5bd90341928263da8d"><div class="ttname"><a href="a01538.html#a7e7330f9af270f5bd90341928263da8d">std::operator&</a></div><div class="ttdeci">bitset< _Nb > operator&(const bitset< _Nb > &__x, const bitset< _Nb > &__y) noexcept</div><div class="ttdoc">Global bitwise operations on bitsets.</div><div class="ttdef"><b>Definition:</b> <a href="a00047_source.html#l01429">bitset:1429</a></div></div>
<div class="ttc" id="a02260_html"><div class="ttname"><a href="a02260.html">std::__future_base::_Result</a></div><div class="ttdoc">A result object that has storage for an object of type _Res.</div><div class="ttdef"><b>Definition:</b> <a href="a00074_source.html#l00227">future:227</a></div></div>
<div class="ttc" id="a04692_html"><div class="ttname"><a href="a04692.html">std::__allocated_ptr</a></div><div class="ttdoc">Non-standard RAII type for managing pointers obtained from allocators.</div><div class="ttdef"><b>Definition:</b> <a href="a00269_source.html#l00046">allocated_ptr.h:46</a></div></div>
<div class="ttc" id="a01486_html_ga200c1d3152b2fd43b206da6c031b9730"><div class="ttname"><a href="a01486.html#ga200c1d3152b2fd43b206da6c031b9730">std::make_exception_ptr</a></div><div class="ttdeci">exception_ptr make_exception_ptr(_Ex) noexcept</div><div class="ttdoc">Obtain an exception_ptr pointing to a copy of the supplied object.</div><div class="ttdef"><b>Definition:</b> <a href="a00332_source.html#l00179">exception_ptr.h:179</a></div></div>
<div class="ttc" id="a07964_html"><div class="ttname"><a href="a07964.html">std::unique_ptr</a></div><div class="ttdoc">20.7.1.2 unique_ptr for single objects.</div><div class="ttdef"><b>Definition:</b> <a href="a00620_source.html#l00160">unique_ptr.h:160</a></div></div>
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