<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <meta http-equiv="X-UA-Compatible" content="IE=9"/> <meta name="generator" content="Doxygen 1.8.13"/> <meta name="viewport" content="width=device-width, initial-scale=1"/> <title>libstdc++: shared_ptr_base.h Source File</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="dynsections.js"></script> <link href="navtree.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="resize.js"></script> <script type="text/javascript" src="navtreedata.js"></script> <script type="text/javascript" src="navtree.js"></script> <script type="text/javascript"> $(document).ready(initResizable); </script> <link href="doxygen.css" rel="stylesheet" type="text/css" /> </head> <body> <div id="top"><!-- do not remove this div, it is closed by doxygen! --> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td id="projectalign" style="padding-left: 0.5em;"> <div id="projectname">libstdc++ </div> </td> </tr> </tbody> </table> </div> <!-- end header part --> <!-- Generated by Doxygen 1.8.13 --> </div><!-- top --> <div id="side-nav" class="ui-resizable side-nav-resizable"> <div id="nav-tree"> <div id="nav-tree-contents"> <div id="nav-sync" class="sync"></div> </div> </div> <div id="splitbar" style="-moz-user-select:none;" class="ui-resizable-handle"> </div> </div> <script type="text/javascript"> $(document).ready(function(){initNavTree('a00473_source.html','');}); </script> <div id="doc-content"> <div class="header"> <div class="headertitle"> <div class="title">shared_ptr_base.h</div> </div> </div><!--header--> <div class="contents"> <a href="a00473.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">// shared_ptr and weak_ptr implementation details -*- 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) 2007-2015 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> </div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">// GCC Note: Based on files from version 1.32.0 of the Boost library.</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment">// shared_count.hpp</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment">// Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd.</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment">// shared_ptr.hpp</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment">// Copyright (C) 1998, 1999 Greg Colvin and Beman Dawes.</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment">// Copyright (C) 2001, 2002, 2003 Peter Dimov</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="comment">// weak_ptr.hpp</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment">// Copyright (C) 2001, 2002, 2003 Peter Dimov</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment">// enable_shared_from_this.hpp</span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment">// Copyright (C) 2002 Peter Dimov</span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment">// Distributed under the Boost Software License, Version 1.0. (See</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment">// accompanying file LICENSE_1_0.txt or copy at</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment">// http://www.boost.org/LICENSE_1_0.txt)</span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"></span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment">/** @file bits/shared_ptr_base.h</span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"> * This is an internal header file, included by other library headers.</span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"> * Do not attempt to use it directly. @headername{memory}</span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> */</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor">#ifndef _SHARED_PTR_BASE_H</span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor">#define _SHARED_PTR_BASE_H 1</span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> </div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor">#include <<a class="code" href="a00260.html">bits/allocated_ptr.h</a>></span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="preprocessor">#include <<a class="code" href="a00968.html">ext/aligned_buffer.h</a>></span></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> <span class="keyword">namespace </span><a class="code" href="a01487.html">std</a> _GLIBCXX_VISIBILITY(default)</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> {</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> _GLIBCXX_BEGIN_NAMESPACE_VERSION</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="preprocessor">#if _GLIBCXX_USE_DEPRECATED</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keyword">template</span><<span class="keyword">typename</span>> <span class="keyword">class </span>auto_ptr;</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="preprocessor">#endif</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"> * @brief Exception possibly thrown by @c shared_ptr.</span></div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> * @ingroup exceptions</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment"> */</span></div><div class="line"><a name="l00067"></a><span class="lineno"><a class="line" href="a06121.html"> 67</a></span>  <span class="keyword">class </span><a class="code" href="a06121.html">bad_weak_ptr</a> : <span class="keyword">public</span> <a class="code" href="a01593.html">std::exception</a></div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  {</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keyword">virtual</span> <span class="keywordtype">char</span> <span class="keyword">const</span>*</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <a class="code" href="a06121.html#adfea1fffacfb8c9c39f374e16ec7315c">what</a>() <span class="keyword">const</span> noexcept;</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="keyword">virtual</span> ~<a class="code" href="a06121.html">bad_weak_ptr</a>() noexcept; </div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  };</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> </div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="comment">// Substitute for bad_weak_ptr object in the case of -fno-exceptions.</span></div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  __throw_bad_weak_ptr()</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  { _GLIBCXX_THROW_OR_ABORT(<a class="code" href="a06121.html">bad_weak_ptr</a>()); }</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span> </div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keyword">using</span> __gnu_cxx::_Lock_policy;</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keyword">using</span> __gnu_cxx::__default_lock_policy;</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keyword">using</span> __gnu_cxx::_S_single;</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keyword">using</span> __gnu_cxx::_S_mutex;</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keyword">using</span> __gnu_cxx::_S_atomic;</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> </div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="comment">// Empty helper class except when the template argument is _S_mutex.</span></div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keyword">template</span><_Lock_policy _Lp></div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keyword">class </span>_Mutex_base</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  {</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keyword">protected</span>:</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="comment">// The atomic policy uses fully-fenced builtins, single doesn't care.</span></div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keyword">enum</span> { _S_need_barriers = 0 };</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  };</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> </div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keyword">template</span><></div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keyword">class </span>_Mutex_base<_S_mutex></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  : <span class="keyword">public</span> __gnu_cxx::__mutex</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  {</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keyword">protected</span>:</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="comment">// This policy is used when atomic builtins are not available.</span></div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="comment">// The replacement atomic operations might not have the necessary</span></div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="comment">// memory barriers.</span></div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keyword">enum</span> { _S_need_barriers = 1 };</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> </div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keyword">template</span><_Lock_policy _Lp = __default_lock_policy></div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keyword">class </span>_Sp_counted_base</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  : <span class="keyword">public</span> _Mutex_base<_Lp></div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  {</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keyword">public</span>: </div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  _Sp_counted_base() noexcept</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  : _M_use_count(1), _M_weak_count(1) { }</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  </div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keyword">virtual</span></div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  ~_Sp_counted_base() noexcept</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>  </div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="comment">// Called when _M_use_count drops to zero, to release the resources</span></div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="comment">// managed by *this.</span></div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  _M_dispose() noexcept = 0;</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  </div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="comment">// Called when _M_weak_count drops to zero.</span></div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  _M_destroy() noexcept</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  { <span class="keyword">delete</span> <span class="keyword">this</span>; }</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  </div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span>*</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  _M_get_deleter(<span class="keyword">const</span> <a class="code" href="a01617.html">std::type_info</a>&) noexcept = 0;</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span> </div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  _M_add_ref_copy()</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  { __gnu_cxx::__atomic_add_dispatch(&_M_use_count, 1); }</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  </div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  _M_add_ref_lock();</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>  <span class="keywordtype">bool</span></div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  _M_add_ref_lock_nothrow();</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>  <span class="keywordtype">void</span></div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  _M_release() noexcept</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="comment">// Be race-detector-friendly. For more info see bits/c++config.</span></div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&_M_use_count);</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keywordflow">if</span> (__gnu_cxx::__exchange_and_add_dispatch(&_M_use_count, -1) == 1)</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>  _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&_M_use_count);</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  _M_dispose();</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="comment">// There must be a memory barrier between dispose() and destroy()</span></div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="comment">// to ensure that the effects of dispose() are observed in the</span></div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="comment">// thread that runs destroy().</span></div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="comment">// See http://gcc.gnu.org/ml/libstdc++/2005-11/msg00136.html</span></div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keywordflow">if</span> (_Mutex_base<_Lp>::_S_need_barriers)</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>  _GLIBCXX_READ_MEM_BARRIER;</div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  _GLIBCXX_WRITE_MEM_BARRIER;</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>  <span class="comment">// Be race-detector-friendly. For more info see bits/c++config.</span></div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&_M_weak_count);</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keywordflow">if</span> (__gnu_cxx::__exchange_and_add_dispatch(&_M_weak_count,</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  -1) == 1)</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  {</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&_M_weak_count);</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  _M_destroy();</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  }</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  }</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  }</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  </div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  _M_weak_add_ref() noexcept</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  { __gnu_cxx::__atomic_add_dispatch(&_M_weak_count, 1); }</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>  <span class="keywordtype">void</span></div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  _M_weak_release() noexcept</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  {</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="comment">// Be race-detector-friendly. For more info see bits/c++config.</span></div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&_M_weak_count);</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="keywordflow">if</span> (__gnu_cxx::__exchange_and_add_dispatch(&_M_weak_count, -1) == 1)</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  {</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&_M_weak_count);</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keywordflow">if</span> (_Mutex_base<_Lp>::_S_need_barriers)</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  {</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="comment">// See _M_release(),</span></div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="comment">// destroy() must observe results of dispose()</span></div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  _GLIBCXX_READ_MEM_BARRIER;</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  _GLIBCXX_WRITE_MEM_BARRIER;</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>  _M_destroy();</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  }</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  }</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  </div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="keywordtype">long</span></div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  _M_get_use_count() <span class="keyword">const</span> noexcept</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  {</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="comment">// No memory barrier is used here so there is no synchronization</span></div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="comment">// with other threads.</span></div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="keywordflow">return</span> __atomic_load_n(&_M_use_count, __ATOMIC_RELAXED);</div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  }</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span> </div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="keyword">private</span>: </div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  _Sp_counted_base(_Sp_counted_base <span class="keyword">const</span>&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  _Sp_counted_base& operator=(_Sp_counted_base <span class="keyword">const</span>&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span> </div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  _Atomic_word _M_use_count; <span class="comment">// #shared</span></div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  _Atomic_word _M_weak_count; <span class="comment">// #weak + (#shared != 0)</span></div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  };</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">template</span><></div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  _Sp_counted_base<_S_single>::</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  _M_add_ref_lock()</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="keywordflow">if</span> (_M_use_count == 0)</div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  __throw_bad_weak_ptr();</div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  ++_M_use_count;</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> </div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keyword">template</span><></div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  _Sp_counted_base<_S_mutex>::</div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  _M_add_ref_lock()</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  {</div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <a class="code" href="a09041.html">__gnu_cxx::__scoped_lock</a> sentry(*<span class="keyword">this</span>);</div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <span class="keywordflow">if</span> (__gnu_cxx::__exchange_and_add_dispatch(&_M_use_count, 1) == 0)</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>  _M_use_count = 0;</div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  __throw_bad_weak_ptr();</div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  }</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> </div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="keyword">template</span><> </div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  _Sp_counted_base<_S_atomic>::</div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  _M_add_ref_lock()</div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  {</div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="comment">// Perform lock-free add-if-not-zero operation.</span></div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  _Atomic_word __count = _M_get_use_count();</div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <span class="keywordflow">do</span></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>  <span class="keywordflow">if</span> (__count == 0)</div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  __throw_bad_weak_ptr();</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <span class="comment">// Replace the current counter value with the old value + 1, as</span></div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <span class="comment">// long as it's not changed meanwhile. </span></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="keywordflow">while</span> (!__atomic_compare_exchange_n(&_M_use_count, &__count, __count + 1,</div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  <span class="keyword">true</span>, __ATOMIC_ACQ_REL, </div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  __ATOMIC_RELAXED));</div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  }</div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span> </div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  <span class="keyword">template</span><></div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  _Sp_counted_base<_S_single>::</div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  _M_add_ref_lock_nothrow()</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>  <span class="keywordflow">if</span> (_M_use_count == 0)</div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  ++_M_use_count;</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  }</div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span> </div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  <span class="keyword">template</span><></div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  _Sp_counted_base<_S_mutex>::</div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  _M_add_ref_lock_nothrow()</div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  {</div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <a class="code" href="a09041.html">__gnu_cxx::__scoped_lock</a> sentry(*<span class="keyword">this</span>);</div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <span class="keywordflow">if</span> (__gnu_cxx::__exchange_and_add_dispatch(&_M_use_count, 1) == 0)</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>  _M_use_count = 0;</div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</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>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  }</div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span> </div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  <span class="keyword">template</span><></div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  _Sp_counted_base<_S_atomic>::</div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  _M_add_ref_lock_nothrow()</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>  <span class="comment">// Perform lock-free add-if-not-zero operation.</span></div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  _Atomic_word __count = _M_get_use_count();</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  <span class="keywordflow">do</span></div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  {</div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="keywordflow">if</span> (__count == 0)</div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <span class="comment">// Replace the current counter value with the old value + 1, as</span></div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="comment">// long as it's not changed meanwhile.</span></div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  }</div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="keywordflow">while</span> (!__atomic_compare_exchange_n(&_M_use_count, &__count, __count + 1,</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  <span class="keyword">true</span>, __ATOMIC_ACQ_REL,</div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  __ATOMIC_RELAXED));</div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</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="keyword">template</span><></div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  _Sp_counted_base<_S_single>::_M_add_ref_copy()</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  { ++_M_use_count; }</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="keyword">template</span><></div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  _Sp_counted_base<_S_single>::_M_release() noexcept</div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  {</div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="keywordflow">if</span> (--_M_use_count == 0)</div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  {</div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  _M_dispose();</div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="keywordflow">if</span> (--_M_weak_count == 0)</div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  _M_destroy();</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>  }</div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span> </div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  <span class="keyword">template</span><></div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  _Sp_counted_base<_S_single>::_M_weak_add_ref() noexcept</div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  { ++_M_weak_count; }</div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span> </div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  <span class="keyword">template</span><></div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  _Sp_counted_base<_S_single>::_M_weak_release() noexcept</div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  {</div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  <span class="keywordflow">if</span> (--_M_weak_count == 0)</div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  _M_destroy();</div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  }</div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span> </div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  <span class="keyword">template</span><></div><div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  <span class="keyword">inline</span> <span class="keywordtype">long</span></div><div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  _Sp_counted_base<_S_single>::_M_get_use_count() <span class="keyword">const</span> noexcept</div><div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  { <span class="keywordflow">return</span> _M_use_count; }</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> </div><div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  <span class="comment">// Forward declarations.</span></div><div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, _Lock_policy _Lp = __default_lock_policy></div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  <span class="keyword">class </span>__shared_ptr;</div><div class="line"><a name="l00337"></a><span class="lineno"> 337</span> </div><div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, _Lock_policy _Lp = __default_lock_policy></div><div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  <span class="keyword">class </span>__weak_ptr;</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> _Tp, _Lock_policy _Lp = __default_lock_policy></div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  <span class="keyword">class </span>__enable_shared_from_this;</div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span> </div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  <span class="keyword">class </span><a class="code" href="a06085.html">shared_ptr</a>;</div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span> </div><div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  <span class="keyword">class </span><a class="code" href="a06093.html">weak_ptr</a>;</div><div class="line"><a name="l00349"></a><span class="lineno"> 349</span> </div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="keyword">struct </span><a class="code" href="a06097.html">owner_less</a>;</div><div class="line"><a name="l00352"></a><span class="lineno"> 352</span> </div><div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  <span class="keyword">class </span><a class="code" href="a06109.html">enable_shared_from_this</a>;</div><div class="line"><a name="l00355"></a><span class="lineno"> 355</span> </div><div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  <span class="keyword">template</span><_Lock_policy _Lp = __default_lock_policy></div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  <span class="keyword">class </span>__weak_count;</div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span> </div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  <span class="keyword">template</span><_Lock_policy _Lp = __default_lock_policy></div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  <span class="keyword">class </span>__shared_count;</div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span> </div><div class="line"><a name="l00362"></a><span class="lineno"> 362</span> </div><div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  <span class="comment">// Counted ptr with no deleter or allocator support</span></div><div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Ptr, _Lock_policy _Lp></div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  <span class="keyword">class </span>_Sp_counted_ptr final : <span class="keyword">public</span> _Sp_counted_base<_Lp></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="keyword">public</span>:</div><div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  <span class="keyword">explicit</span></div><div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  _Sp_counted_ptr(_Ptr __p) noexcept</div><div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  : _M_ptr(__p) { }</div><div class="line"><a name="l00371"></a><span class="lineno"> 371</span> </div><div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  _M_dispose() noexcept</div><div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  { <span class="keyword">delete</span> _M_ptr; }</div><div class="line"><a name="l00375"></a><span class="lineno"> 375</span> </div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  _M_destroy() noexcept</div><div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  { <span class="keyword">delete</span> <span class="keyword">this</span>; }</div><div class="line"><a name="l00379"></a><span class="lineno"> 379</span> </div><div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span>*</div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  _M_get_deleter(<span class="keyword">const</span> <a class="code" href="a01617.html">std::type_info</a>&) noexcept</div><div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  { <span class="keywordflow">return</span> <span class="keyword">nullptr</span>; }</div><div class="line"><a name="l00383"></a><span class="lineno"> 383</span> </div><div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  _Sp_counted_ptr(<span class="keyword">const</span> _Sp_counted_ptr&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  _Sp_counted_ptr& operator=(<span class="keyword">const</span> _Sp_counted_ptr&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00386"></a><span class="lineno"> 386</span> </div><div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  _Ptr _M_ptr;</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> </div><div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  <span class="keyword">template</span><></div><div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  _Sp_counted_ptr<nullptr_t, _S_single>::_M_dispose() noexcept { }</div><div class="line"><a name="l00394"></a><span class="lineno"> 394</span> </div><div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  <span class="keyword">template</span><></div><div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  _Sp_counted_ptr<nullptr_t, _S_mutex>::_M_dispose() noexcept { }</div><div class="line"><a name="l00398"></a><span class="lineno"> 398</span> </div><div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  <span class="keyword">template</span><></div><div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  _Sp_counted_ptr<nullptr_t, _S_atomic>::_M_dispose() noexcept { }</div><div class="line"><a name="l00402"></a><span class="lineno"> 402</span> </div><div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  <span class="keyword">template</span><<span class="keywordtype">int</span> _Nm, <span class="keyword">typename</span> _Tp,</div><div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  <span class="keywordtype">bool</span> __use_ebo = !__is_final(_Tp) && __is_empty(_Tp)></div><div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  <span class="keyword">struct </span>_Sp_ebo_helper;</div><div class="line"><a name="l00406"></a><span class="lineno"> 406</span> <span class="comment"></span></div><div class="line"><a name="l00407"></a><span class="lineno"> 407</span> <span class="comment"> /// Specialization using EBO.</span></div><div class="line"><a name="l00408"></a><span class="lineno"> 408</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keywordtype">int</span> _Nm, <span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00409"></a><span class="lineno"><a class="line" href="a06165.html"> 409</a></span>  <span class="keyword">struct </span>_Sp_ebo_helper<_Nm, _Tp, true> : <span class="keyword">private</span> _Tp</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="keyword">explicit</span> _Sp_ebo_helper(<span class="keyword">const</span> _Tp& __tp) : _Tp(__tp) { }</div><div class="line"><a name="l00412"></a><span class="lineno"> 412</span> </div><div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  <span class="keyword">static</span> _Tp&</div><div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  _S_get(_Sp_ebo_helper& __eboh) { <span class="keywordflow">return</span> <span class="keyword">static_cast<</span>_Tp&<span class="keyword">></span>(__eboh); }</div><div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  };</div><div class="line"><a name="l00416"></a><span class="lineno"> 416</span> <span class="comment"></span></div><div class="line"><a name="l00417"></a><span class="lineno"> 417</span> <span class="comment"> /// Specialization not using EBO.</span></div><div class="line"><a name="l00418"></a><span class="lineno"> 418</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keywordtype">int</span> _Nm, <span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00419"></a><span class="lineno"><a class="line" href="a06169.html"> 419</a></span>  <span class="keyword">struct </span>_Sp_ebo_helper<_Nm, _Tp, false></div><div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  {</div><div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  <span class="keyword">explicit</span> _Sp_ebo_helper(<span class="keyword">const</span> _Tp& __tp) : _M_tp(__tp) { }</div><div class="line"><a name="l00422"></a><span class="lineno"> 422</span> </div><div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  <span class="keyword">static</span> _Tp&</div><div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  _S_get(_Sp_ebo_helper& __eboh)</div><div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  { <span class="keywordflow">return</span> __eboh._M_tp; }</div><div class="line"><a name="l00426"></a><span class="lineno"> 426</span> </div><div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  _Tp _M_tp;</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">// Support for custom deleter and/or allocator</span></div><div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Ptr, <span class="keyword">typename</span> _Deleter, <span class="keyword">typename</span> _Alloc, _Lock_policy _Lp></div><div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  <span class="keyword">class </span>_Sp_counted_deleter final : <span class="keyword">public</span> _Sp_counted_base<_Lp></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="keyword">class </span>_Impl : _Sp_ebo_helper<0, _Deleter>, _Sp_ebo_helper<1, _Alloc></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>  <span class="keyword">typedef</span> _Sp_ebo_helper<0, _Deleter> _Del_base;</div><div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  <span class="keyword">typedef</span> _Sp_ebo_helper<1, _Alloc> _Alloc_base;</div><div class="line"><a name="l00439"></a><span class="lineno"> 439</span> </div><div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  _Impl(_Ptr __p, _Deleter __d, <span class="keyword">const</span> _Alloc& __a) noexcept</div><div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  : _M_ptr(__p), _Del_base(__d), _Alloc_base(__a)</div><div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  { }</div><div class="line"><a name="l00444"></a><span class="lineno"> 444</span> </div><div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  _Deleter& _M_del() noexcept { <span class="keywordflow">return</span> _Del_base::_S_get(*<span class="keyword">this</span>); }</div><div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  _Alloc& _M_alloc() noexcept { <span class="keywordflow">return</span> _Alloc_base::_S_get(*<span class="keyword">this</span>); }</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>  _Ptr _M_ptr;</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> </div><div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  <span class="keyword">using</span> __allocator_type = __alloc_rebind<_Alloc, _Sp_counted_deleter>;</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="comment">// __d(__p) must not throw.</span></div><div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  _Sp_counted_deleter(_Ptr __p, _Deleter __d) noexcept</div><div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  : _M_impl(__p, __d, _Alloc()) { }</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="comment">// __d(__p) must not throw.</span></div><div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  _Sp_counted_deleter(_Ptr __p, _Deleter __d, <span class="keyword">const</span> _Alloc& __a) noexcept</div><div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  : _M_impl(__p, __d, __a) { }</div><div class="line"><a name="l00461"></a><span class="lineno"> 461</span> </div><div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  ~_Sp_counted_deleter() noexcept { }</div><div class="line"><a name="l00463"></a><span class="lineno"> 463</span> </div><div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  _M_dispose() noexcept</div><div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  { _M_impl._M_del()(_M_impl._M_ptr); }</div><div class="line"><a name="l00467"></a><span class="lineno"> 467</span> </div><div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  _M_destroy() noexcept</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>  __allocator_type __a(_M_impl._M_alloc());</div><div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  <a class="code" href="a04125.html">__allocated_ptr<__allocator_type></a> __guard_ptr{ __a, <span class="keyword">this</span> };</div><div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  this->~_Sp_counted_deleter();</div><div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  }</div><div class="line"><a name="l00475"></a><span class="lineno"> 475</span> </div><div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span>*</div><div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  _M_get_deleter(<span class="keyword">const</span> <a class="code" href="a01617.html">std::type_info</a>& __ti) noexcept</div><div class="line"><a name="l00478"></a><span class="lineno"> 478</span>  {</div><div class="line"><a name="l00479"></a><span class="lineno"> 479</span> <span class="preprocessor">#if __cpp_rtti</span></div><div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  <span class="comment">// _GLIBCXX_RESOLVE_LIB_DEFECTS</span></div><div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  <span class="comment">// 2400. shared_ptr's get_deleter() should use addressof()</span></div><div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  <span class="keywordflow">return</span> __ti == <span class="keyword">typeid</span>(_Deleter)</div><div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  ? <a class="code" href="a01431.html#ga145a38ffdb1e846f389c2841897665b7">std::__addressof</a>(_M_impl._M_del())</div><div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  : <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00485"></a><span class="lineno"> 485</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00486"></a><span class="lineno"> 486</span>  <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00487"></a><span class="lineno"> 487</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00488"></a><span class="lineno"> 488</span>  }</div><div class="line"><a name="l00489"></a><span class="lineno"> 489</span> </div><div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00491"></a><span class="lineno"> 491</span>  _Impl _M_impl;</div><div class="line"><a name="l00492"></a><span class="lineno"> 492</span>  };</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>  <span class="comment">// helpers for make_shared / allocate_shared</span></div><div class="line"><a name="l00495"></a><span class="lineno"> 495</span> </div><div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  <span class="keyword">struct </span>_Sp_make_shared_tag { };</div><div class="line"><a name="l00497"></a><span class="lineno"> 497</span> </div><div class="line"><a name="l00498"></a><span class="lineno"> 498</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Alloc, _Lock_policy _Lp></div><div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  <span class="keyword">class </span>_Sp_counted_ptr_inplace final : <span class="keyword">public</span> _Sp_counted_base<_Lp></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">class </span>_Impl : _Sp_ebo_helper<0, _Alloc></div><div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  {</div><div class="line"><a name="l00503"></a><span class="lineno"> 503</span>  <span class="keyword">typedef</span> _Sp_ebo_helper<0, _Alloc> _A_base;</div><div class="line"><a name="l00504"></a><span class="lineno"> 504</span> </div><div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  <span class="keyword">explicit</span> _Impl(_Alloc __a) noexcept : _A_base(__a) { }</div><div class="line"><a name="l00507"></a><span class="lineno"> 507</span> </div><div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  _Alloc& _M_alloc() noexcept { <span class="keywordflow">return</span> _A_base::_S_get(*<span class="keyword">this</span>); }</div><div class="line"><a name="l00509"></a><span class="lineno"> 509</span> </div><div class="line"><a name="l00510"></a><span class="lineno"> 510</span>  __gnu_cxx::__aligned_buffer<_Tp> _M_storage;</div><div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  };</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="keyword">public</span>:</div><div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  <span class="keyword">using</span> __allocator_type = __alloc_rebind<_Alloc, _Sp_counted_ptr_inplace>;</div><div class="line"><a name="l00515"></a><span class="lineno"> 515</span> </div><div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  _Sp_counted_ptr_inplace(_Alloc __a, _Args&&... __args)</div><div class="line"><a name="l00518"></a><span class="lineno"> 518</span>  : _M_impl(__a)</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>  <span class="comment">// _GLIBCXX_RESOLVE_LIB_DEFECTS</span></div><div class="line"><a name="l00521"></a><span class="lineno"> 521</span>  <span class="comment">// 2070. allocate_shared should use allocator_traits<A>::construct</span></div><div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  <a class="code" href="a04085.html#aad7d7b8604439d1ecf953a1b9a426e7b">allocator_traits<_Alloc>::construct</a>(__a, _M_ptr(),</div><div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  std::forward<_Args>(__args)...); <span class="comment">// might throw</span></div><div class="line"><a name="l00524"></a><span class="lineno"> 524</span>  }</div><div class="line"><a name="l00525"></a><span class="lineno"> 525</span> </div><div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  ~_Sp_counted_ptr_inplace() noexcept { }</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>  <span class="keyword">virtual</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  _M_dispose() noexcept</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>  <a class="code" href="a04085.html#ac73f3d164cf01c9d61b44d42c30db3d3">allocator_traits<_Alloc>::destroy</a>(_M_impl._M_alloc(), _M_ptr());</div><div class="line"><a name="l00532"></a><span class="lineno"> 532</span>  }</div><div class="line"><a name="l00533"></a><span class="lineno"> 533</span> </div><div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  <span class="comment">// Override because the allocator needs to know the dynamic type</span></div><div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00536"></a><span class="lineno"> 536</span>  _M_destroy() noexcept</div><div class="line"><a name="l00537"></a><span class="lineno"> 537</span>  {</div><div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  __allocator_type __a(_M_impl._M_alloc());</div><div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  <a class="code" href="a04125.html">__allocated_ptr<__allocator_type></a> __guard_ptr{ __a, <span class="keyword">this</span> };</div><div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  this->~_Sp_counted_ptr_inplace();</div><div class="line"><a name="l00541"></a><span class="lineno"> 541</span>  }</div><div class="line"><a name="l00542"></a><span class="lineno"> 542</span> </div><div class="line"><a name="l00543"></a><span class="lineno"> 543</span>  <span class="comment">// Sneaky trick so __shared_ptr can get the managed pointer</span></div><div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span>*</div><div class="line"><a name="l00545"></a><span class="lineno"> 545</span>  _M_get_deleter(<span class="keyword">const</span> <a class="code" href="a01617.html">std::type_info</a>& __ti) noexcept</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> <span class="preprocessor">#if __cpp_rtti</span></div><div class="line"><a name="l00548"></a><span class="lineno"> 548</span>  <span class="keywordflow">if</span> (__ti == <span class="keyword">typeid</span>(_Sp_make_shared_tag))</div><div class="line"><a name="l00549"></a><span class="lineno"> 549</span>  <span class="keywordflow">return</span> <span class="keyword">const_cast<</span>typename remove_cv<_Tp>::type*<span class="keyword">></span>(_M_ptr());</div><div class="line"><a name="l00550"></a><span class="lineno"> 550</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00551"></a><span class="lineno"> 551</span>  <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00552"></a><span class="lineno"> 552</span>  }</div><div class="line"><a name="l00553"></a><span class="lineno"> 553</span> </div><div class="line"><a name="l00554"></a><span class="lineno"> 554</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00555"></a><span class="lineno"> 555</span>  _Tp* _M_ptr() noexcept { <span class="keywordflow">return</span> _M_impl._M_storage._M_ptr(); }</div><div class="line"><a name="l00556"></a><span class="lineno"> 556</span> </div><div class="line"><a name="l00557"></a><span class="lineno"> 557</span>  _Impl _M_impl;</div><div class="line"><a name="l00558"></a><span class="lineno"> 558</span>  };</div><div class="line"><a name="l00559"></a><span class="lineno"> 559</span> </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>  <span class="keyword">template</span><_Lock_policy _Lp></div><div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  <span class="keyword">class </span>__shared_count</div><div class="line"><a name="l00563"></a><span class="lineno"> 563</span>  {</div><div class="line"><a name="l00564"></a><span class="lineno"> 564</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00565"></a><span class="lineno"> 565</span>  constexpr __shared_count() noexcept : _M_pi(0)</div><div class="line"><a name="l00566"></a><span class="lineno"> 566</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>  <span class="keyword">template</span><<span class="keyword">typename</span> _Ptr></div><div class="line"><a name="l00569"></a><span class="lineno"> 569</span>  <span class="keyword">explicit</span></div><div class="line"><a name="l00570"></a><span class="lineno"> 570</span>  __shared_count(_Ptr __p) : _M_pi(0)</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>  __try</div><div class="line"><a name="l00573"></a><span class="lineno"> 573</span>  {</div><div class="line"><a name="l00574"></a><span class="lineno"> 574</span>  _M_pi = <span class="keyword">new</span> _Sp_counted_ptr<_Ptr, _Lp>(__p);</div><div class="line"><a name="l00575"></a><span class="lineno"> 575</span>  }</div><div class="line"><a name="l00576"></a><span class="lineno"> 576</span>  __catch(...)</div><div class="line"><a name="l00577"></a><span class="lineno"> 577</span>  {</div><div class="line"><a name="l00578"></a><span class="lineno"> 578</span>  <span class="keyword">delete</span> __p;</div><div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  __throw_exception_again;</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="keyword">template</span><<span class="keyword">typename</span> _Ptr, <span class="keyword">typename</span> _Deleter></div><div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  __shared_count(_Ptr __p, _Deleter __d)</div><div class="line"><a name="l00585"></a><span class="lineno"> 585</span>  : __shared_count(__p, std::move(__d), <a class="code" href="a04129.html">allocator<void></a>())</div><div class="line"><a name="l00586"></a><span class="lineno"> 586</span>  { }</div><div class="line"><a name="l00587"></a><span class="lineno"> 587</span> </div><div class="line"><a name="l00588"></a><span class="lineno"> 588</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Ptr, <span class="keyword">typename</span> _Deleter, <span class="keyword">typename</span> _Alloc></div><div class="line"><a name="l00589"></a><span class="lineno"> 589</span>  __shared_count(_Ptr __p, _Deleter __d, _Alloc __a) : _M_pi(0)</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">typedef</span> _Sp_counted_deleter<_Ptr, _Deleter, _Alloc, _Lp> _Sp_cd_type;</div><div class="line"><a name="l00592"></a><span class="lineno"> 592</span>  __try</div><div class="line"><a name="l00593"></a><span class="lineno"> 593</span>  {</div><div class="line"><a name="l00594"></a><span class="lineno"> 594</span>  <span class="keyword">typename</span> _Sp_cd_type::__allocator_type __a2(__a);</div><div class="line"><a name="l00595"></a><span class="lineno"> 595</span>  <span class="keyword">auto</span> __guard = <a class="code" href="a01487.html#a1fa3f7679aec1619e37fddf24eb70a11">std::__allocate_guarded</a>(__a2);</div><div class="line"><a name="l00596"></a><span class="lineno"> 596</span>  _Sp_cd_type* __mem = __guard.get();</div><div class="line"><a name="l00597"></a><span class="lineno"> 597</span>  ::new (__mem) _Sp_cd_type(__p, std::move(__d), std::move(__a));</div><div class="line"><a name="l00598"></a><span class="lineno"> 598</span>  _M_pi = __mem;</div><div class="line"><a name="l00599"></a><span class="lineno"> 599</span>  __guard = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00600"></a><span class="lineno"> 600</span>  }</div><div class="line"><a name="l00601"></a><span class="lineno"> 601</span>  __catch(...)</div><div class="line"><a name="l00602"></a><span class="lineno"> 602</span>  {</div><div class="line"><a name="l00603"></a><span class="lineno"> 603</span>  __d(__p); <span class="comment">// Call _Deleter on __p.</span></div><div class="line"><a name="l00604"></a><span class="lineno"> 604</span>  __throw_exception_again;</div><div class="line"><a name="l00605"></a><span class="lineno"> 605</span>  }</div><div class="line"><a name="l00606"></a><span class="lineno"> 606</span>  }</div><div class="line"><a name="l00607"></a><span class="lineno"> 607</span> </div><div class="line"><a name="l00608"></a><span class="lineno"> 608</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Alloc, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00609"></a><span class="lineno"> 609</span>  __shared_count(_Sp_make_shared_tag, _Tp*, <span class="keyword">const</span> _Alloc& __a,</div><div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  _Args&&... __args)</div><div class="line"><a name="l00611"></a><span class="lineno"> 611</span>  : _M_pi(0)</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">typedef</span> _Sp_counted_ptr_inplace<_Tp, _Alloc, _Lp> _Sp_cp_type;</div><div class="line"><a name="l00614"></a><span class="lineno"> 614</span>  <span class="keyword">typename</span> _Sp_cp_type::__allocator_type __a2(__a);</div><div class="line"><a name="l00615"></a><span class="lineno"> 615</span>  <span class="keyword">auto</span> __guard = <a class="code" href="a01487.html#a1fa3f7679aec1619e37fddf24eb70a11">std::__allocate_guarded</a>(__a2);</div><div class="line"><a name="l00616"></a><span class="lineno"> 616</span>  _Sp_cp_type* __mem = __guard.get();</div><div class="line"><a name="l00617"></a><span class="lineno"> 617</span>  ::new (__mem) _Sp_cp_type(std::move(__a),</div><div class="line"><a name="l00618"></a><span class="lineno"> 618</span>  std::forward<_Args>(__args)...);</div><div class="line"><a name="l00619"></a><span class="lineno"> 619</span>  _M_pi = __mem;</div><div class="line"><a name="l00620"></a><span class="lineno"> 620</span>  __guard = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00621"></a><span class="lineno"> 621</span>  }</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> <span class="preprocessor">#if _GLIBCXX_USE_DEPRECATED</span></div><div class="line"><a name="l00624"></a><span class="lineno"> 624</span>  <span class="comment">// Special case for auto_ptr<_Tp> to provide the strong guarantee.</span></div><div class="line"><a name="l00625"></a><span class="lineno"> 625</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00626"></a><span class="lineno"> 626</span>  <span class="keyword">explicit</span></div><div class="line"><a name="l00627"></a><span class="lineno"> 627</span>  __shared_count(<a class="code" href="a07325.html">std::auto_ptr<_Tp></a>&& __r);</div><div class="line"><a name="l00628"></a><span class="lineno"> 628</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00629"></a><span class="lineno"> 629</span> </div><div class="line"><a name="l00630"></a><span class="lineno"> 630</span>  <span class="comment">// Special case for unique_ptr<_Tp,_Del> to provide the strong guarantee.</span></div><div class="line"><a name="l00631"></a><span class="lineno"> 631</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Del></div><div class="line"><a name="l00632"></a><span class="lineno"> 632</span>  <span class="keyword">explicit</span></div><div class="line"><a name="l00633"></a><span class="lineno"> 633</span>  __shared_count(<a class="code" href="a06853.html">std::unique_ptr<_Tp, _Del></a>&& __r) : _M_pi(0)</div><div class="line"><a name="l00634"></a><span class="lineno"> 634</span>  {</div><div class="line"><a name="l00635"></a><span class="lineno"> 635</span>  <span class="keyword">using</span> _Ptr = <span class="keyword">typename</span> unique_ptr<_Tp, _Del>::pointer;</div><div class="line"><a name="l00636"></a><span class="lineno"> 636</span>  <span class="keyword">using</span> _Del2 = <span class="keyword">typename</span> conditional<is_reference<_Del>::value,</div><div class="line"><a name="l00637"></a><span class="lineno"> 637</span>  <a class="code" href="a02249.html">reference_wrapper<typename remove_reference<_Del>::type</a>>,</div><div class="line"><a name="l00638"></a><span class="lineno"> 638</span>  _Del>::type;</div><div class="line"><a name="l00639"></a><span class="lineno"> 639</span>  <span class="keyword">using</span> _Sp_cd_type</div><div class="line"><a name="l00640"></a><span class="lineno"> 640</span>  = _Sp_counted_deleter<_Ptr, _Del2, allocator<void>, _Lp>;</div><div class="line"><a name="l00641"></a><span class="lineno"> 641</span>  <span class="keyword">using</span> _Alloc = <a class="code" href="a04137.html">allocator<_Sp_cd_type></a>;</div><div class="line"><a name="l00642"></a><span class="lineno"> 642</span>  <span class="keyword">using</span> _Alloc_traits = <a class="code" href="a04085.html">allocator_traits<_Alloc></a>;</div><div class="line"><a name="l00643"></a><span class="lineno"> 643</span>  _Alloc __a;</div><div class="line"><a name="l00644"></a><span class="lineno"> 644</span>  _Sp_cd_type* __mem = _Alloc_traits::allocate(__a, 1);</div><div class="line"><a name="l00645"></a><span class="lineno"> 645</span>  _Alloc_traits::construct(__a, __mem, __r.release(),</div><div class="line"><a name="l00646"></a><span class="lineno"> 646</span>  __r.get_deleter()); <span class="comment">// non-throwing</span></div><div class="line"><a name="l00647"></a><span class="lineno"> 647</span>  _M_pi = __mem;</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> </div><div class="line"><a name="l00650"></a><span class="lineno"> 650</span>  <span class="comment">// Throw bad_weak_ptr when __r._M_get_use_count() == 0.</span></div><div class="line"><a name="l00651"></a><span class="lineno"> 651</span>  <span class="keyword">explicit</span> __shared_count(<span class="keyword">const</span> __weak_count<_Lp>& __r);</div><div class="line"><a name="l00652"></a><span class="lineno"> 652</span> </div><div class="line"><a name="l00653"></a><span class="lineno"> 653</span>  <span class="comment">// Does not throw if __r._M_get_use_count() == 0, caller must check.</span></div><div class="line"><a name="l00654"></a><span class="lineno"> 654</span>  <span class="keyword">explicit</span> __shared_count(<span class="keyword">const</span> __weak_count<_Lp>& __r, std::nothrow_t);</div><div class="line"><a name="l00655"></a><span class="lineno"> 655</span> </div><div class="line"><a name="l00656"></a><span class="lineno"> 656</span>  ~__shared_count() noexcept</div><div class="line"><a name="l00657"></a><span class="lineno"> 657</span>  {</div><div class="line"><a name="l00658"></a><span class="lineno"> 658</span>  <span class="keywordflow">if</span> (_M_pi != <span class="keyword">nullptr</span>)</div><div class="line"><a name="l00659"></a><span class="lineno"> 659</span>  _M_pi->_M_release();</div><div class="line"><a name="l00660"></a><span class="lineno"> 660</span>  }</div><div class="line"><a name="l00661"></a><span class="lineno"> 661</span> </div><div class="line"><a name="l00662"></a><span class="lineno"> 662</span>  __shared_count(<span class="keyword">const</span> __shared_count& __r) noexcept</div><div class="line"><a name="l00663"></a><span class="lineno"> 663</span>  : _M_pi(__r._M_pi)</div><div class="line"><a name="l00664"></a><span class="lineno"> 664</span>  {</div><div class="line"><a name="l00665"></a><span class="lineno"> 665</span>  <span class="keywordflow">if</span> (_M_pi != 0)</div><div class="line"><a name="l00666"></a><span class="lineno"> 666</span>  _M_pi->_M_add_ref_copy();</div><div class="line"><a name="l00667"></a><span class="lineno"> 667</span>  }</div><div class="line"><a name="l00668"></a><span class="lineno"> 668</span> </div><div class="line"><a name="l00669"></a><span class="lineno"> 669</span>  __shared_count&</div><div class="line"><a name="l00670"></a><span class="lineno"> 670</span>  operator=(<span class="keyword">const</span> __shared_count& __r) noexcept</div><div class="line"><a name="l00671"></a><span class="lineno"> 671</span>  {</div><div class="line"><a name="l00672"></a><span class="lineno"> 672</span>  _Sp_counted_base<_Lp>* __tmp = __r._M_pi;</div><div class="line"><a name="l00673"></a><span class="lineno"> 673</span>  <span class="keywordflow">if</span> (__tmp != _M_pi)</div><div class="line"><a name="l00674"></a><span class="lineno"> 674</span>  {</div><div class="line"><a name="l00675"></a><span class="lineno"> 675</span>  <span class="keywordflow">if</span> (__tmp != 0)</div><div class="line"><a name="l00676"></a><span class="lineno"> 676</span>  __tmp->_M_add_ref_copy();</div><div class="line"><a name="l00677"></a><span class="lineno"> 677</span>  <span class="keywordflow">if</span> (_M_pi != 0)</div><div class="line"><a name="l00678"></a><span class="lineno"> 678</span>  _M_pi->_M_release();</div><div class="line"><a name="l00679"></a><span class="lineno"> 679</span>  _M_pi = __tmp;</div><div class="line"><a name="l00680"></a><span class="lineno"> 680</span>  }</div><div class="line"><a name="l00681"></a><span class="lineno"> 681</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00682"></a><span class="lineno"> 682</span>  }</div><div class="line"><a name="l00683"></a><span class="lineno"> 683</span> </div><div class="line"><a name="l00684"></a><span class="lineno"> 684</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00685"></a><span class="lineno"> 685</span>  _M_swap(__shared_count& __r) noexcept</div><div class="line"><a name="l00686"></a><span class="lineno"> 686</span>  {</div><div class="line"><a name="l00687"></a><span class="lineno"> 687</span>  _Sp_counted_base<_Lp>* __tmp = __r._M_pi;</div><div class="line"><a name="l00688"></a><span class="lineno"> 688</span>  __r._M_pi = _M_pi;</div><div class="line"><a name="l00689"></a><span class="lineno"> 689</span>  _M_pi = __tmp;</div><div class="line"><a name="l00690"></a><span class="lineno"> 690</span>  }</div><div class="line"><a name="l00691"></a><span class="lineno"> 691</span> </div><div class="line"><a name="l00692"></a><span class="lineno"> 692</span>  <span class="keywordtype">long</span></div><div class="line"><a name="l00693"></a><span class="lineno"> 693</span>  _M_get_use_count() <span class="keyword">const</span> noexcept</div><div class="line"><a name="l00694"></a><span class="lineno"> 694</span>  { <span class="keywordflow">return</span> _M_pi != 0 ? _M_pi->_M_get_use_count() : 0; }</div><div class="line"><a name="l00695"></a><span class="lineno"> 695</span> </div><div class="line"><a name="l00696"></a><span class="lineno"> 696</span>  <span class="keywordtype">bool</span></div><div class="line"><a name="l00697"></a><span class="lineno"> 697</span>  _M_unique() <span class="keyword">const</span> noexcept</div><div class="line"><a name="l00698"></a><span class="lineno"> 698</span>  { <span class="keywordflow">return</span> this->_M_get_use_count() == 1; }</div><div class="line"><a name="l00699"></a><span class="lineno"> 699</span> </div><div class="line"><a name="l00700"></a><span class="lineno"> 700</span>  <span class="keywordtype">void</span>*</div><div class="line"><a name="l00701"></a><span class="lineno"> 701</span>  _M_get_deleter(<span class="keyword">const</span> <a class="code" href="a01617.html">std::type_info</a>& __ti) <span class="keyword">const</span> noexcept</div><div class="line"><a name="l00702"></a><span class="lineno"> 702</span>  { <span class="keywordflow">return</span> _M_pi ? _M_pi->_M_get_deleter(__ti) : <span class="keyword">nullptr</span>; }</div><div class="line"><a name="l00703"></a><span class="lineno"> 703</span> </div><div class="line"><a name="l00704"></a><span class="lineno"> 704</span>  <span class="keywordtype">bool</span></div><div class="line"><a name="l00705"></a><span class="lineno"> 705</span>  _M_less(<span class="keyword">const</span> __shared_count& __rhs) <span class="keyword">const</span> noexcept</div><div class="line"><a name="l00706"></a><span class="lineno"> 706</span>  { <span class="keywordflow">return</span> <a class="code" href="a06417.html">std::less<_Sp_counted_base<_Lp></a>*>()(this->_M_pi, __rhs._M_pi); }</div><div class="line"><a name="l00707"></a><span class="lineno"> 707</span> </div><div class="line"><a name="l00708"></a><span class="lineno"> 708</span>  <span class="keywordtype">bool</span></div><div class="line"><a name="l00709"></a><span class="lineno"> 709</span>  _M_less(<span class="keyword">const</span> __weak_count<_Lp>& __rhs) <span class="keyword">const</span> noexcept</div><div class="line"><a name="l00710"></a><span class="lineno"> 710</span>  { <span class="keywordflow">return</span> <a class="code" href="a06417.html">std::less<_Sp_counted_base<_Lp></a>*>()(this->_M_pi, __rhs._M_pi); }</div><div class="line"><a name="l00711"></a><span class="lineno"> 711</span> </div><div class="line"><a name="l00712"></a><span class="lineno"> 712</span>  <span class="comment">// Friend function injected into enclosing namespace and found by ADL</span></div><div class="line"><a name="l00713"></a><span class="lineno"> 713</span>  <span class="keyword">friend</span> <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l00714"></a><span class="lineno"> 714</span>  operator==(<span class="keyword">const</span> __shared_count& __a, <span class="keyword">const</span> __shared_count& __b) noexcept</div><div class="line"><a name="l00715"></a><span class="lineno"> 715</span>  { <span class="keywordflow">return</span> __a._M_pi == __b._M_pi; }</div><div class="line"><a name="l00716"></a><span class="lineno"> 716</span> </div><div class="line"><a name="l00717"></a><span class="lineno"> 717</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00718"></a><span class="lineno"> 718</span>  <span class="keyword">friend</span> <span class="keyword">class </span>__weak_count<_Lp>;</div><div class="line"><a name="l00719"></a><span class="lineno"> 719</span> </div><div class="line"><a name="l00720"></a><span class="lineno"> 720</span>  _Sp_counted_base<_Lp>* _M_pi;</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> </div><div class="line"><a name="l00724"></a><span class="lineno"> 724</span>  <span class="keyword">template</span><_Lock_policy _Lp></div><div class="line"><a name="l00725"></a><span class="lineno"> 725</span>  <span class="keyword">class </span>__weak_count</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>  <span class="keyword">public</span>:</div><div class="line"><a name="l00728"></a><span class="lineno"> 728</span>  constexpr __weak_count() noexcept : _M_pi(<span class="keyword">nullptr</span>)</div><div class="line"><a name="l00729"></a><span class="lineno"> 729</span>  { }</div><div class="line"><a name="l00730"></a><span class="lineno"> 730</span> </div><div class="line"><a name="l00731"></a><span class="lineno"> 731</span>  __weak_count(<span class="keyword">const</span> __shared_count<_Lp>& __r) noexcept</div><div class="line"><a name="l00732"></a><span class="lineno"> 732</span>  : _M_pi(__r._M_pi)</div><div class="line"><a name="l00733"></a><span class="lineno"> 733</span>  {</div><div class="line"><a name="l00734"></a><span class="lineno"> 734</span>  <span class="keywordflow">if</span> (_M_pi != <span class="keyword">nullptr</span>)</div><div class="line"><a name="l00735"></a><span class="lineno"> 735</span>  _M_pi->_M_weak_add_ref();</div><div class="line"><a name="l00736"></a><span class="lineno"> 736</span>  }</div><div class="line"><a name="l00737"></a><span class="lineno"> 737</span> </div><div class="line"><a name="l00738"></a><span class="lineno"> 738</span>  __weak_count(<span class="keyword">const</span> __weak_count& __r) noexcept</div><div class="line"><a name="l00739"></a><span class="lineno"> 739</span>  : _M_pi(__r._M_pi)</div><div class="line"><a name="l00740"></a><span class="lineno"> 740</span>  {</div><div class="line"><a name="l00741"></a><span class="lineno"> 741</span>  <span class="keywordflow">if</span> (_M_pi != <span class="keyword">nullptr</span>)</div><div class="line"><a name="l00742"></a><span class="lineno"> 742</span>  _M_pi->_M_weak_add_ref();</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> </div><div class="line"><a name="l00745"></a><span class="lineno"> 745</span>  __weak_count(__weak_count&& __r) noexcept</div><div class="line"><a name="l00746"></a><span class="lineno"> 746</span>  : _M_pi(__r._M_pi)</div><div class="line"><a name="l00747"></a><span class="lineno"> 747</span>  { __r._M_pi = <span class="keyword">nullptr</span>; }</div><div class="line"><a name="l00748"></a><span class="lineno"> 748</span> </div><div class="line"><a name="l00749"></a><span class="lineno"> 749</span>  ~__weak_count() noexcept</div><div class="line"><a name="l00750"></a><span class="lineno"> 750</span>  {</div><div class="line"><a name="l00751"></a><span class="lineno"> 751</span>  <span class="keywordflow">if</span> (_M_pi != <span class="keyword">nullptr</span>)</div><div class="line"><a name="l00752"></a><span class="lineno"> 752</span>  _M_pi->_M_weak_release();</div><div class="line"><a name="l00753"></a><span class="lineno"> 753</span>  }</div><div class="line"><a name="l00754"></a><span class="lineno"> 754</span> </div><div class="line"><a name="l00755"></a><span class="lineno"> 755</span>  __weak_count&</div><div class="line"><a name="l00756"></a><span class="lineno"> 756</span>  operator=(<span class="keyword">const</span> __shared_count<_Lp>& __r) noexcept</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>  _Sp_counted_base<_Lp>* __tmp = __r._M_pi;</div><div class="line"><a name="l00759"></a><span class="lineno"> 759</span>  <span class="keywordflow">if</span> (__tmp != <span class="keyword">nullptr</span>)</div><div class="line"><a name="l00760"></a><span class="lineno"> 760</span>  __tmp->_M_weak_add_ref();</div><div class="line"><a name="l00761"></a><span class="lineno"> 761</span>  <span class="keywordflow">if</span> (_M_pi != <span class="keyword">nullptr</span>)</div><div class="line"><a name="l00762"></a><span class="lineno"> 762</span>  _M_pi->_M_weak_release();</div><div class="line"><a name="l00763"></a><span class="lineno"> 763</span>  _M_pi = __tmp;</div><div class="line"><a name="l00764"></a><span class="lineno"> 764</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00765"></a><span class="lineno"> 765</span>  }</div><div class="line"><a name="l00766"></a><span class="lineno"> 766</span> </div><div class="line"><a name="l00767"></a><span class="lineno"> 767</span>  __weak_count&</div><div class="line"><a name="l00768"></a><span class="lineno"> 768</span>  operator=(<span class="keyword">const</span> __weak_count& __r) noexcept</div><div class="line"><a name="l00769"></a><span class="lineno"> 769</span>  {</div><div class="line"><a name="l00770"></a><span class="lineno"> 770</span>  _Sp_counted_base<_Lp>* __tmp = __r._M_pi;</div><div class="line"><a name="l00771"></a><span class="lineno"> 771</span>  <span class="keywordflow">if</span> (__tmp != <span class="keyword">nullptr</span>)</div><div class="line"><a name="l00772"></a><span class="lineno"> 772</span>  __tmp->_M_weak_add_ref();</div><div class="line"><a name="l00773"></a><span class="lineno"> 773</span>  <span class="keywordflow">if</span> (_M_pi != <span class="keyword">nullptr</span>)</div><div class="line"><a name="l00774"></a><span class="lineno"> 774</span>  _M_pi->_M_weak_release();</div><div class="line"><a name="l00775"></a><span class="lineno"> 775</span>  _M_pi = __tmp;</div><div class="line"><a name="l00776"></a><span class="lineno"> 776</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00777"></a><span class="lineno"> 777</span>  }</div><div class="line"><a name="l00778"></a><span class="lineno"> 778</span> </div><div class="line"><a name="l00779"></a><span class="lineno"> 779</span>  __weak_count&</div><div class="line"><a name="l00780"></a><span class="lineno"> 780</span>  operator=(__weak_count&& __r) noexcept</div><div class="line"><a name="l00781"></a><span class="lineno"> 781</span>  {</div><div class="line"><a name="l00782"></a><span class="lineno"> 782</span>  <span class="keywordflow">if</span> (_M_pi != <span class="keyword">nullptr</span>)</div><div class="line"><a name="l00783"></a><span class="lineno"> 783</span>  _M_pi->_M_weak_release();</div><div class="line"><a name="l00784"></a><span class="lineno"> 784</span>  _M_pi = __r._M_pi;</div><div class="line"><a name="l00785"></a><span class="lineno"> 785</span>  __r._M_pi = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00786"></a><span class="lineno"> 786</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00787"></a><span class="lineno"> 787</span>  }</div><div class="line"><a name="l00788"></a><span class="lineno"> 788</span> </div><div class="line"><a name="l00789"></a><span class="lineno"> 789</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00790"></a><span class="lineno"> 790</span>  _M_swap(__weak_count& __r) noexcept</div><div class="line"><a name="l00791"></a><span class="lineno"> 791</span>  {</div><div class="line"><a name="l00792"></a><span class="lineno"> 792</span>  _Sp_counted_base<_Lp>* __tmp = __r._M_pi;</div><div class="line"><a name="l00793"></a><span class="lineno"> 793</span>  __r._M_pi = _M_pi;</div><div class="line"><a name="l00794"></a><span class="lineno"> 794</span>  _M_pi = __tmp;</div><div class="line"><a name="l00795"></a><span class="lineno"> 795</span>  }</div><div class="line"><a name="l00796"></a><span class="lineno"> 796</span> </div><div class="line"><a name="l00797"></a><span class="lineno"> 797</span>  <span class="keywordtype">long</span></div><div class="line"><a name="l00798"></a><span class="lineno"> 798</span>  _M_get_use_count() <span class="keyword">const</span> noexcept</div><div class="line"><a name="l00799"></a><span class="lineno"> 799</span>  { <span class="keywordflow">return</span> _M_pi != <span class="keyword">nullptr</span> ? _M_pi->_M_get_use_count() : 0; }</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="keywordtype">bool</span></div><div class="line"><a name="l00802"></a><span class="lineno"> 802</span>  _M_less(<span class="keyword">const</span> __weak_count& __rhs) <span class="keyword">const</span> noexcept</div><div class="line"><a name="l00803"></a><span class="lineno"> 803</span>  { <span class="keywordflow">return</span> <a class="code" href="a06417.html">std::less<_Sp_counted_base<_Lp></a>*>()(this->_M_pi, __rhs._M_pi); }</div><div class="line"><a name="l00804"></a><span class="lineno"> 804</span> </div><div class="line"><a name="l00805"></a><span class="lineno"> 805</span>  <span class="keywordtype">bool</span></div><div class="line"><a name="l00806"></a><span class="lineno"> 806</span>  _M_less(<span class="keyword">const</span> __shared_count<_Lp>& __rhs) <span class="keyword">const</span> noexcept</div><div class="line"><a name="l00807"></a><span class="lineno"> 807</span>  { <span class="keywordflow">return</span> <a class="code" href="a06417.html">std::less<_Sp_counted_base<_Lp></a>*>()(this->_M_pi, __rhs._M_pi); }</div><div class="line"><a name="l00808"></a><span class="lineno"> 808</span> </div><div class="line"><a name="l00809"></a><span class="lineno"> 809</span>  <span class="comment">// Friend function injected into enclosing namespace and found by ADL</span></div><div class="line"><a name="l00810"></a><span class="lineno"> 810</span>  <span class="keyword">friend</span> <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l00811"></a><span class="lineno"> 811</span>  operator==(<span class="keyword">const</span> __weak_count& __a, <span class="keyword">const</span> __weak_count& __b) noexcept</div><div class="line"><a name="l00812"></a><span class="lineno"> 812</span>  { <span class="keywordflow">return</span> __a._M_pi == __b._M_pi; }</div><div class="line"><a name="l00813"></a><span class="lineno"> 813</span> </div><div class="line"><a name="l00814"></a><span class="lineno"> 814</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00815"></a><span class="lineno"> 815</span>  <span class="keyword">friend</span> <span class="keyword">class </span>__shared_count<_Lp>;</div><div class="line"><a name="l00816"></a><span class="lineno"> 816</span> </div><div class="line"><a name="l00817"></a><span class="lineno"> 817</span>  _Sp_counted_base<_Lp>* _M_pi;</div><div class="line"><a name="l00818"></a><span class="lineno"> 818</span>  };</div><div class="line"><a name="l00819"></a><span class="lineno"> 819</span> </div><div class="line"><a name="l00820"></a><span class="lineno"> 820</span>  <span class="comment">// Now that __weak_count is defined we can define this constructor:</span></div><div class="line"><a name="l00821"></a><span class="lineno"> 821</span>  <span class="keyword">template</span><_Lock_policy _Lp></div><div class="line"><a name="l00822"></a><span class="lineno"> 822</span>  <span class="keyword">inline</span></div><div class="line"><a name="l00823"></a><span class="lineno"> 823</span>  __shared_count<_Lp>::__shared_count(<span class="keyword">const</span> __weak_count<_Lp>& __r)</div><div class="line"><a name="l00824"></a><span class="lineno"> 824</span>  : _M_pi(__r._M_pi)</div><div class="line"><a name="l00825"></a><span class="lineno"> 825</span>  {</div><div class="line"><a name="l00826"></a><span class="lineno"> 826</span>  <span class="keywordflow">if</span> (_M_pi != <span class="keyword">nullptr</span>)</div><div class="line"><a name="l00827"></a><span class="lineno"> 827</span>  _M_pi->_M_add_ref_lock();</div><div class="line"><a name="l00828"></a><span class="lineno"> 828</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00829"></a><span class="lineno"> 829</span>  __throw_bad_weak_ptr();</div><div class="line"><a name="l00830"></a><span class="lineno"> 830</span>  }</div><div class="line"><a name="l00831"></a><span class="lineno"> 831</span> </div><div class="line"><a name="l00832"></a><span class="lineno"> 832</span>  <span class="comment">// Now that __weak_count is defined we can define this constructor:</span></div><div class="line"><a name="l00833"></a><span class="lineno"> 833</span>  <span class="keyword">template</span><_Lock_policy _Lp></div><div class="line"><a name="l00834"></a><span class="lineno"> 834</span>  <span class="keyword">inline</span></div><div class="line"><a name="l00835"></a><span class="lineno"> 835</span>  __shared_count<_Lp>::</div><div class="line"><a name="l00836"></a><span class="lineno"> 836</span>  __shared_count(<span class="keyword">const</span> __weak_count<_Lp>& __r, std::nothrow_t)</div><div class="line"><a name="l00837"></a><span class="lineno"> 837</span>  : _M_pi(__r._M_pi)</div><div class="line"><a name="l00838"></a><span class="lineno"> 838</span>  {</div><div class="line"><a name="l00839"></a><span class="lineno"> 839</span>  <span class="keywordflow">if</span> (_M_pi != <span class="keyword">nullptr</span>)</div><div class="line"><a name="l00840"></a><span class="lineno"> 840</span>  <span class="keywordflow">if</span> (!_M_pi->_M_add_ref_lock_nothrow())</div><div class="line"><a name="l00841"></a><span class="lineno"> 841</span>  _M_pi = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00842"></a><span class="lineno"> 842</span>  }</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">// Support for enable_shared_from_this.</span></div><div class="line"><a name="l00845"></a><span class="lineno"> 845</span> </div><div class="line"><a name="l00846"></a><span class="lineno"> 846</span>  <span class="comment">// Friend of __enable_shared_from_this.</span></div><div class="line"><a name="l00847"></a><span class="lineno"> 847</span>  <span class="keyword">template</span><_Lock_policy _Lp, <span class="keyword">typename</span> _Tp1, <span class="keyword">typename</span> _Tp2></div><div class="line"><a name="l00848"></a><span class="lineno"> 848</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00849"></a><span class="lineno"> 849</span>  __enable_shared_from_this_helper(<span class="keyword">const</span> __shared_count<_Lp>&,</div><div class="line"><a name="l00850"></a><span class="lineno"> 850</span>  <span class="keyword">const</span> __enable_shared_from_this<_Tp1,</div><div class="line"><a name="l00851"></a><span class="lineno"> 851</span>  _Lp>*, <span class="keyword">const</span> _Tp2*) noexcept;</div><div class="line"><a name="l00852"></a><span class="lineno"> 852</span> </div><div class="line"><a name="l00853"></a><span class="lineno"> 853</span>  <span class="comment">// Friend of enable_shared_from_this.</span></div><div class="line"><a name="l00854"></a><span class="lineno"> 854</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1, <span class="keyword">typename</span> _Tp2></div><div class="line"><a name="l00855"></a><span class="lineno"> 855</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00856"></a><span class="lineno"> 856</span>  __enable_shared_from_this_helper(<span class="keyword">const</span> __shared_count<>&,</div><div class="line"><a name="l00857"></a><span class="lineno"> 857</span>  <span class="keyword">const</span> <a class="code" href="a06109.html">enable_shared_from_this<_Tp1></a>*,</div><div class="line"><a name="l00858"></a><span class="lineno"> 858</span>  <span class="keyword">const</span> _Tp2*) noexcept;</div><div class="line"><a name="l00859"></a><span class="lineno"> 859</span> </div><div class="line"><a name="l00860"></a><span class="lineno"> 860</span>  <span class="keyword">template</span><_Lock_policy _Lp></div><div class="line"><a name="l00861"></a><span class="lineno"> 861</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00862"></a><span class="lineno"> 862</span>  __enable_shared_from_this_helper(<span class="keyword">const</span> __shared_count<_Lp>&, ...) noexcept</div><div class="line"><a name="l00863"></a><span class="lineno"> 863</span>  { }</div><div class="line"><a name="l00864"></a><span class="lineno"> 864</span> </div><div class="line"><a name="l00865"></a><span class="lineno"> 865</span> </div><div class="line"><a name="l00866"></a><span class="lineno"> 866</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, _Lock_policy _Lp></div><div class="line"><a name="l00867"></a><span class="lineno"> 867</span>  <span class="keyword">class </span>__shared_ptr</div><div class="line"><a name="l00868"></a><span class="lineno"> 868</span>  {</div><div class="line"><a name="l00869"></a><span class="lineno"> 869</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Ptr></div><div class="line"><a name="l00870"></a><span class="lineno"> 870</span>  <span class="keyword">using</span> _Convertible</div><div class="line"><a name="l00871"></a><span class="lineno"> 871</span>  = <span class="keyword">typename</span> enable_if<is_convertible<_Ptr, _Tp*>::value>::type;</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>  <span class="keyword">public</span>:</div><div class="line"><a name="l00874"></a><span class="lineno"> 874</span>  <span class="keyword">typedef</span> _Tp element_type;</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>  constexpr __shared_ptr() noexcept</div><div class="line"><a name="l00877"></a><span class="lineno"> 877</span>  : _M_ptr(0), _M_refcount()</div><div class="line"><a name="l00878"></a><span class="lineno"> 878</span>  { }</div><div class="line"><a name="l00879"></a><span class="lineno"> 879</span> </div><div class="line"><a name="l00880"></a><span class="lineno"> 880</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1></div><div class="line"><a name="l00881"></a><span class="lineno"> 881</span>  <span class="keyword">explicit</span> __shared_ptr(_Tp1* __p)</div><div class="line"><a name="l00882"></a><span class="lineno"> 882</span>  : _M_ptr(__p), _M_refcount(__p)</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>  __glibcxx_function_requires(_ConvertibleConcept<_Tp1*, _Tp*>)</div><div class="line"><a name="l00885"></a><span class="lineno"> 885</span>  static_assert( !<a class="code" href="a03557.html">is_void<_Tp1>::value</a>, <span class="stringliteral">"incomplete type"</span> );</div><div class="line"><a name="l00886"></a><span class="lineno"> 886</span>  static_assert( <span class="keyword">sizeof</span>(_Tp1) > 0, <span class="stringliteral">"incomplete type"</span> );</div><div class="line"><a name="l00887"></a><span class="lineno"> 887</span>  __enable_shared_from_this_helper(_M_refcount, __p, __p);</div><div class="line"><a name="l00888"></a><span class="lineno"> 888</span>  }</div><div class="line"><a name="l00889"></a><span class="lineno"> 889</span> </div><div class="line"><a name="l00890"></a><span class="lineno"> 890</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1, <span class="keyword">typename</span> _Deleter></div><div class="line"><a name="l00891"></a><span class="lineno"> 891</span>  __shared_ptr(_Tp1* __p, _Deleter __d)</div><div class="line"><a name="l00892"></a><span class="lineno"> 892</span>  : _M_ptr(__p), _M_refcount(__p, __d)</div><div class="line"><a name="l00893"></a><span class="lineno"> 893</span>  {</div><div class="line"><a name="l00894"></a><span class="lineno"> 894</span>  __glibcxx_function_requires(_ConvertibleConcept<_Tp1*, _Tp*>)</div><div class="line"><a name="l00895"></a><span class="lineno"> 895</span>  <span class="comment">// TODO requires _Deleter CopyConstructible and __d(__p) well-formed</span></div><div class="line"><a name="l00896"></a><span class="lineno"> 896</span>  __enable_shared_from_this_helper(_M_refcount, __p, __p);</div><div class="line"><a name="l00897"></a><span class="lineno"> 897</span>  }</div><div class="line"><a name="l00898"></a><span class="lineno"> 898</span> </div><div class="line"><a name="l00899"></a><span class="lineno"> 899</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1, <span class="keyword">typename</span> _Deleter, <span class="keyword">typename</span> _Alloc></div><div class="line"><a name="l00900"></a><span class="lineno"> 900</span>  __shared_ptr(_Tp1* __p, _Deleter __d, _Alloc __a)</div><div class="line"><a name="l00901"></a><span class="lineno"> 901</span>  : _M_ptr(__p), _M_refcount(__p, __d, std::move(__a))</div><div class="line"><a name="l00902"></a><span class="lineno"> 902</span>  {</div><div class="line"><a name="l00903"></a><span class="lineno"> 903</span>  __glibcxx_function_requires(_ConvertibleConcept<_Tp1*, _Tp*>)</div><div class="line"><a name="l00904"></a><span class="lineno"> 904</span>  <span class="comment">// TODO requires _Deleter CopyConstructible and __d(__p) well-formed</span></div><div class="line"><a name="l00905"></a><span class="lineno"> 905</span>  __enable_shared_from_this_helper(_M_refcount, __p, __p);</div><div class="line"><a name="l00906"></a><span class="lineno"> 906</span>  }</div><div class="line"><a name="l00907"></a><span class="lineno"> 907</span> </div><div class="line"><a name="l00908"></a><span class="lineno"> 908</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Deleter></div><div class="line"><a name="l00909"></a><span class="lineno"> 909</span>  __shared_ptr(nullptr_t __p, _Deleter __d)</div><div class="line"><a name="l00910"></a><span class="lineno"> 910</span>  : _M_ptr(0), _M_refcount(__p, __d)</div><div class="line"><a name="l00911"></a><span class="lineno"> 911</span>  { }</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>  <span class="keyword">template</span><<span class="keyword">typename</span> _Deleter, <span class="keyword">typename</span> _Alloc></div><div class="line"><a name="l00914"></a><span class="lineno"> 914</span>  __shared_ptr(nullptr_t __p, _Deleter __d, _Alloc __a)</div><div class="line"><a name="l00915"></a><span class="lineno"> 915</span>  : _M_ptr(0), _M_refcount(__p, __d, std::move(__a))</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> </div><div class="line"><a name="l00918"></a><span class="lineno"> 918</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1></div><div class="line"><a name="l00919"></a><span class="lineno"> 919</span>  __shared_ptr(<span class="keyword">const</span> __shared_ptr<_Tp1, _Lp>& __r, _Tp* __p) noexcept</div><div class="line"><a name="l00920"></a><span class="lineno"> 920</span>  : _M_ptr(__p), _M_refcount(__r._M_refcount) <span class="comment">// never throws</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> </div><div class="line"><a name="l00923"></a><span class="lineno"> 923</span>  __shared_ptr(<span class="keyword">const</span> __shared_ptr&) noexcept = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00924"></a><span class="lineno"> 924</span>  __shared_ptr& operator=(<span class="keyword">const</span> __shared_ptr&) noexcept = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00925"></a><span class="lineno"> 925</span>  ~__shared_ptr() = <span class="keywordflow">default</span>;</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="keyword">template</span><<span class="keyword">typename</span> _Tp1, <span class="keyword">typename</span> = _Convertible<_Tp1*>></div><div class="line"><a name="l00928"></a><span class="lineno"> 928</span>  __shared_ptr(<span class="keyword">const</span> __shared_ptr<_Tp1, _Lp>& __r) noexcept</div><div class="line"><a name="l00929"></a><span class="lineno"> 929</span>  : _M_ptr(__r._M_ptr), _M_refcount(__r._M_refcount)</div><div class="line"><a name="l00930"></a><span class="lineno"> 930</span>  { }</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>  __shared_ptr(__shared_ptr&& __r) noexcept</div><div class="line"><a name="l00933"></a><span class="lineno"> 933</span>  : _M_ptr(__r._M_ptr), _M_refcount()</div><div class="line"><a name="l00934"></a><span class="lineno"> 934</span>  {</div><div class="line"><a name="l00935"></a><span class="lineno"> 935</span>  _M_refcount._M_swap(__r._M_refcount);</div><div class="line"><a name="l00936"></a><span class="lineno"> 936</span>  __r._M_ptr = 0;</div><div class="line"><a name="l00937"></a><span class="lineno"> 937</span>  }</div><div class="line"><a name="l00938"></a><span class="lineno"> 938</span> </div><div class="line"><a name="l00939"></a><span class="lineno"> 939</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1, <span class="keyword">typename</span> = _Convertible<_Tp1*>></div><div class="line"><a name="l00940"></a><span class="lineno"> 940</span>  __shared_ptr(__shared_ptr<_Tp1, _Lp>&& __r) noexcept</div><div class="line"><a name="l00941"></a><span class="lineno"> 941</span>  : _M_ptr(__r._M_ptr), _M_refcount()</div><div class="line"><a name="l00942"></a><span class="lineno"> 942</span>  {</div><div class="line"><a name="l00943"></a><span class="lineno"> 943</span>  _M_refcount._M_swap(__r._M_refcount);</div><div class="line"><a name="l00944"></a><span class="lineno"> 944</span>  __r._M_ptr = 0;</div><div class="line"><a name="l00945"></a><span class="lineno"> 945</span>  }</div><div class="line"><a name="l00946"></a><span class="lineno"> 946</span> </div><div class="line"><a name="l00947"></a><span class="lineno"> 947</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1></div><div class="line"><a name="l00948"></a><span class="lineno"> 948</span>  <span class="keyword">explicit</span> __shared_ptr(<span class="keyword">const</span> __weak_ptr<_Tp1, _Lp>& __r)</div><div class="line"><a name="l00949"></a><span class="lineno"> 949</span>  : _M_refcount(__r._M_refcount) <span class="comment">// may throw</span></div><div class="line"><a name="l00950"></a><span class="lineno"> 950</span>  {</div><div class="line"><a name="l00951"></a><span class="lineno"> 951</span>  __glibcxx_function_requires(_ConvertibleConcept<_Tp1*, _Tp*>)</div><div class="line"><a name="l00952"></a><span class="lineno"> 952</span> </div><div class="line"><a name="l00953"></a><span class="lineno"> 953</span>  <span class="comment">// It is now safe to copy __r._M_ptr, as</span></div><div class="line"><a name="l00954"></a><span class="lineno"> 954</span>  <span class="comment">// _M_refcount(__r._M_refcount) did not throw.</span></div><div class="line"><a name="l00955"></a><span class="lineno"> 955</span>  _M_ptr = __r._M_ptr;</div><div class="line"><a name="l00956"></a><span class="lineno"> 956</span>  }</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>  <span class="comment">// If an exception is thrown this constructor has no effect.</span></div><div class="line"><a name="l00959"></a><span class="lineno"> 959</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1, <span class="keyword">typename</span> _Del, <span class="keyword">typename</span></div><div class="line"><a name="l00960"></a><span class="lineno"> 960</span>  = _Convertible<typename unique_ptr<_Tp1, _Del>::pointer>></div><div class="line"><a name="l00961"></a><span class="lineno"> 961</span>  __shared_ptr(<a class="code" href="a06853.html">std::unique_ptr<_Tp1, _Del></a>&& __r)</div><div class="line"><a name="l00962"></a><span class="lineno"> 962</span>  : _M_ptr(__r.get()), _M_refcount()</div><div class="line"><a name="l00963"></a><span class="lineno"> 963</span>  {</div><div class="line"><a name="l00964"></a><span class="lineno"> 964</span>  __glibcxx_function_requires(_ConvertibleConcept<_Tp1*, _Tp*>)</div><div class="line"><a name="l00965"></a><span class="lineno"> 965</span>  <span class="keyword">auto</span> __raw = _S_raw_ptr(__r.get());</div><div class="line"><a name="l00966"></a><span class="lineno"> 966</span>  _M_refcount = __shared_count<_Lp>(std::move(__r));</div><div class="line"><a name="l00967"></a><span class="lineno"> 967</span>  __enable_shared_from_this_helper(_M_refcount, __raw, __raw);</div><div class="line"><a name="l00968"></a><span class="lineno"> 968</span>  }</div><div class="line"><a name="l00969"></a><span class="lineno"> 969</span> </div><div class="line"><a name="l00970"></a><span class="lineno"> 970</span> <span class="preprocessor">#if _GLIBCXX_USE_DEPRECATED</span></div><div class="line"><a name="l00971"></a><span class="lineno"> 971</span>  <span class="comment">// Postcondition: use_count() == 1 and __r.get() == 0</span></div><div class="line"><a name="l00972"></a><span class="lineno"> 972</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1></div><div class="line"><a name="l00973"></a><span class="lineno"> 973</span>  __shared_ptr(<a class="code" href="a07325.html">std::auto_ptr<_Tp1></a>&& __r);</div><div class="line"><a name="l00974"></a><span class="lineno"> 974</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00975"></a><span class="lineno"> 975</span> </div><div class="line"><a name="l00976"></a><span class="lineno"> 976</span>  constexpr __shared_ptr(nullptr_t) noexcept : __shared_ptr() { }</div><div class="line"><a name="l00977"></a><span class="lineno"> 977</span> </div><div class="line"><a name="l00978"></a><span class="lineno"> 978</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1></div><div class="line"><a name="l00979"></a><span class="lineno"> 979</span>  __shared_ptr&</div><div class="line"><a name="l00980"></a><span class="lineno"> 980</span>  operator=(<span class="keyword">const</span> __shared_ptr<_Tp1, _Lp>& __r) noexcept</div><div class="line"><a name="l00981"></a><span class="lineno"> 981</span>  {</div><div class="line"><a name="l00982"></a><span class="lineno"> 982</span>  _M_ptr = __r._M_ptr;</div><div class="line"><a name="l00983"></a><span class="lineno"> 983</span>  _M_refcount = __r._M_refcount; <span class="comment">// __shared_count::op= doesn't throw</span></div><div class="line"><a name="l00984"></a><span class="lineno"> 984</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00985"></a><span class="lineno"> 985</span>  }</div><div class="line"><a name="l00986"></a><span class="lineno"> 986</span> </div><div class="line"><a name="l00987"></a><span class="lineno"> 987</span> <span class="preprocessor">#if _GLIBCXX_USE_DEPRECATED</span></div><div class="line"><a name="l00988"></a><span class="lineno"> 988</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1></div><div class="line"><a name="l00989"></a><span class="lineno"> 989</span>  __shared_ptr&</div><div class="line"><a name="l00990"></a><span class="lineno"> 990</span>  operator=(<a class="code" href="a07325.html">std::auto_ptr<_Tp1></a>&& __r)</div><div class="line"><a name="l00991"></a><span class="lineno"> 991</span>  {</div><div class="line"><a name="l00992"></a><span class="lineno"> 992</span>  __shared_ptr(std::move(__r)).swap(*<span class="keyword">this</span>);</div><div class="line"><a name="l00993"></a><span class="lineno"> 993</span>  <span class="keywordflow">return</span> *<span class="keyword">this</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> <span class="preprocessor">#endif</span></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_ptr&</div><div class="line"><a name="l00998"></a><span class="lineno"> 998</span>  operator=(__shared_ptr&& __r) noexcept</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>  __shared_ptr(std::move(__r)).swap(*<span class="keyword">this</span>);</div><div class="line"><a name="l01001"></a><span class="lineno"> 1001</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l01002"></a><span class="lineno"> 1002</span>  }</div><div class="line"><a name="l01003"></a><span class="lineno"> 1003</span> </div><div class="line"><a name="l01004"></a><span class="lineno"> 1004</span>  <span class="keyword">template</span><<span class="keyword">class</span> _Tp1></div><div class="line"><a name="l01005"></a><span class="lineno"> 1005</span>  __shared_ptr&</div><div class="line"><a name="l01006"></a><span class="lineno"> 1006</span>  operator=(__shared_ptr<_Tp1, _Lp>&& __r) noexcept</div><div class="line"><a name="l01007"></a><span class="lineno"> 1007</span>  {</div><div class="line"><a name="l01008"></a><span class="lineno"> 1008</span>  __shared_ptr(std::move(__r)).swap(*<span class="keyword">this</span>);</div><div class="line"><a name="l01009"></a><span class="lineno"> 1009</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l01010"></a><span class="lineno"> 1010</span>  }</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>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1, <span class="keyword">typename</span> _Del></div><div class="line"><a name="l01013"></a><span class="lineno"> 1013</span>  __shared_ptr&</div><div class="line"><a name="l01014"></a><span class="lineno"> 1014</span>  operator=(<a class="code" href="a06853.html">std::unique_ptr<_Tp1, _Del></a>&& __r)</div><div class="line"><a name="l01015"></a><span class="lineno"> 1015</span>  {</div><div class="line"><a name="l01016"></a><span class="lineno"> 1016</span>  __shared_ptr(std::move(__r)).swap(*<span class="keyword">this</span>);</div><div class="line"><a name="l01017"></a><span class="lineno"> 1017</span>  <span class="keywordflow">return</span> *<span class="keyword">this</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> </div><div class="line"><a name="l01020"></a><span class="lineno"> 1020</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01021"></a><span class="lineno"> 1021</span>  reset() noexcept</div><div class="line"><a name="l01022"></a><span class="lineno"> 1022</span>  { __shared_ptr().swap(*<span class="keyword">this</span>); }</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>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1></div><div class="line"><a name="l01025"></a><span class="lineno"> 1025</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01026"></a><span class="lineno"> 1026</span>  reset(_Tp1* __p) <span class="comment">// _Tp1 must be complete.</span></div><div class="line"><a name="l01027"></a><span class="lineno"> 1027</span>  {</div><div class="line"><a name="l01028"></a><span class="lineno"> 1028</span>  <span class="comment">// Catch self-reset errors.</span></div><div class="line"><a name="l01029"></a><span class="lineno"> 1029</span>  _GLIBCXX_DEBUG_ASSERT(__p == 0 || __p != _M_ptr);</div><div class="line"><a name="l01030"></a><span class="lineno"> 1030</span>  __shared_ptr(__p).swap(*<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> </div><div class="line"><a name="l01033"></a><span class="lineno"> 1033</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1, <span class="keyword">typename</span> _Deleter></div><div class="line"><a name="l01034"></a><span class="lineno"> 1034</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01035"></a><span class="lineno"> 1035</span>  reset(_Tp1* __p, _Deleter __d)</div><div class="line"><a name="l01036"></a><span class="lineno"> 1036</span>  { __shared_ptr(__p, __d).swap(*<span class="keyword">this</span>); }</div><div class="line"><a name="l01037"></a><span class="lineno"> 1037</span> </div><div class="line"><a name="l01038"></a><span class="lineno"> 1038</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1, <span class="keyword">typename</span> _Deleter, <span class="keyword">typename</span> _Alloc></div><div class="line"><a name="l01039"></a><span class="lineno"> 1039</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01040"></a><span class="lineno"> 1040</span>  reset(_Tp1* __p, _Deleter __d, _Alloc __a)</div><div class="line"><a name="l01041"></a><span class="lineno"> 1041</span>  { __shared_ptr(__p, __d, std::move(__a)).swap(*<span class="keyword">this</span>); }</div><div class="line"><a name="l01042"></a><span class="lineno"> 1042</span> </div><div class="line"><a name="l01043"></a><span class="lineno"> 1043</span>  <span class="comment">// Allow class instantiation when _Tp is [cv-qual] void.</span></div><div class="line"><a name="l01044"></a><span class="lineno"> 1044</span>  <span class="keyword">typename</span> std::add_lvalue_reference<_Tp>::type</div><div class="line"><a name="l01045"></a><span class="lineno"> 1045</span>  <a class="code" href="a01420.html#gaf84b7343bdda8ed9615cd8f5a61c5e83">operator*</a>() <span class="keyword">const</span> noexcept</div><div class="line"><a name="l01046"></a><span class="lineno"> 1046</span>  {</div><div class="line"><a name="l01047"></a><span class="lineno"> 1047</span>  _GLIBCXX_DEBUG_ASSERT(_M_ptr != 0);</div><div class="line"><a name="l01048"></a><span class="lineno"> 1048</span>  <span class="keywordflow">return</span> *_M_ptr;</div><div class="line"><a name="l01049"></a><span class="lineno"> 1049</span>  }</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>  _Tp*</div><div class="line"><a name="l01052"></a><span class="lineno"> 1052</span>  operator->() <span class="keyword">const</span> noexcept</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>  _GLIBCXX_DEBUG_ASSERT(_M_ptr != 0);</div><div class="line"><a name="l01055"></a><span class="lineno"> 1055</span>  <span class="keywordflow">return</span> _M_ptr;</div><div class="line"><a name="l01056"></a><span class="lineno"> 1056</span>  }</div><div class="line"><a name="l01057"></a><span class="lineno"> 1057</span> </div><div class="line"><a name="l01058"></a><span class="lineno"> 1058</span>  _Tp*</div><div class="line"><a name="l01059"></a><span class="lineno"> 1059</span>  <span class="keyword">get</span>() <span class="keyword">const</span> noexcept</div><div class="line"><a name="l01060"></a><span class="lineno"> 1060</span>  { <span class="keywordflow">return</span> _M_ptr; }</div><div class="line"><a name="l01061"></a><span class="lineno"> 1061</span> </div><div class="line"><a name="l01062"></a><span class="lineno"> 1062</span>  <span class="keyword">explicit</span> <span class="keyword">operator</span> bool() <span class="keyword">const</span> <span class="comment">// never throws</span></div><div class="line"><a name="l01063"></a><span class="lineno"> 1063</span>  { <span class="keywordflow">return</span> _M_ptr == 0 ? false : <span class="keyword">true</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="keywordtype">bool</span></div><div class="line"><a name="l01066"></a><span class="lineno"> 1066</span>  unique() <span class="keyword">const</span> noexcept</div><div class="line"><a name="l01067"></a><span class="lineno"> 1067</span>  { <span class="keywordflow">return</span> _M_refcount._M_unique(); }</div><div class="line"><a name="l01068"></a><span class="lineno"> 1068</span> </div><div class="line"><a name="l01069"></a><span class="lineno"> 1069</span>  <span class="keywordtype">long</span></div><div class="line"><a name="l01070"></a><span class="lineno"> 1070</span>  use_count() <span class="keyword">const</span> noexcept</div><div class="line"><a name="l01071"></a><span class="lineno"> 1071</span>  { <span class="keywordflow">return</span> _M_refcount._M_get_use_count(); }</div><div class="line"><a name="l01072"></a><span class="lineno"> 1072</span> </div><div class="line"><a name="l01073"></a><span class="lineno"> 1073</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01074"></a><span class="lineno"> 1074</span>  swap(__shared_ptr<_Tp, _Lp>& __other) noexcept</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>  std::swap(_M_ptr, __other._M_ptr);</div><div class="line"><a name="l01077"></a><span class="lineno"> 1077</span>  _M_refcount._M_swap(__other._M_refcount);</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> </div><div class="line"><a name="l01080"></a><span class="lineno"> 1080</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1></div><div class="line"><a name="l01081"></a><span class="lineno"> 1081</span>  <span class="keywordtype">bool</span></div><div class="line"><a name="l01082"></a><span class="lineno"> 1082</span>  owner_before(__shared_ptr<_Tp1, _Lp> <span class="keyword">const</span>& __rhs) <span class="keyword">const</span> noexcept</div><div class="line"><a name="l01083"></a><span class="lineno"> 1083</span>  { <span class="keywordflow">return</span> _M_refcount._M_less(__rhs._M_refcount); }</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="keyword">template</span><<span class="keyword">typename</span> _Tp1></div><div class="line"><a name="l01086"></a><span class="lineno"> 1086</span>  <span class="keywordtype">bool</span></div><div class="line"><a name="l01087"></a><span class="lineno"> 1087</span>  owner_before(__weak_ptr<_Tp1, _Lp> <span class="keyword">const</span>& __rhs) <span class="keyword">const</span> noexcept</div><div class="line"><a name="l01088"></a><span class="lineno"> 1088</span>  { <span class="keywordflow">return</span> _M_refcount._M_less(__rhs._M_refcount); }</div><div class="line"><a name="l01089"></a><span class="lineno"> 1089</span> </div><div class="line"><a name="l01090"></a><span class="lineno"> 1090</span> <span class="preprocessor">#if __cpp_rtti</span></div><div class="line"><a name="l01091"></a><span class="lineno"> 1091</span>  <span class="keyword">protected</span>:</div><div class="line"><a name="l01092"></a><span class="lineno"> 1092</span>  <span class="comment">// This constructor is non-standard, it is used by allocate_shared.</span></div><div class="line"><a name="l01093"></a><span class="lineno"> 1093</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Alloc, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l01094"></a><span class="lineno"> 1094</span>  __shared_ptr(_Sp_make_shared_tag __tag, <span class="keyword">const</span> _Alloc& __a,</div><div class="line"><a name="l01095"></a><span class="lineno"> 1095</span>  _Args&&... __args)</div><div class="line"><a name="l01096"></a><span class="lineno"> 1096</span>  : _M_ptr(), _M_refcount(__tag, (_Tp*)0, __a,</div><div class="line"><a name="l01097"></a><span class="lineno"> 1097</span>  std::forward<_Args>(__args)...)</div><div class="line"><a name="l01098"></a><span class="lineno"> 1098</span>  {</div><div class="line"><a name="l01099"></a><span class="lineno"> 1099</span>  <span class="comment">// _M_ptr needs to point to the newly constructed object.</span></div><div class="line"><a name="l01100"></a><span class="lineno"> 1100</span>  <span class="comment">// This relies on _Sp_counted_ptr_inplace::_M_get_deleter.</span></div><div class="line"><a name="l01101"></a><span class="lineno"> 1101</span>  <span class="keywordtype">void</span>* __p = _M_refcount._M_get_deleter(<span class="keyword">typeid</span>(__tag));</div><div class="line"><a name="l01102"></a><span class="lineno"> 1102</span>  _M_ptr = <span class="keyword">static_cast<</span>_Tp*<span class="keyword">></span>(__p);</div><div class="line"><a name="l01103"></a><span class="lineno"> 1103</span>  __enable_shared_from_this_helper(_M_refcount, _M_ptr, _M_ptr);</div><div class="line"><a name="l01104"></a><span class="lineno"> 1104</span>  }</div><div class="line"><a name="l01105"></a><span class="lineno"> 1105</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l01106"></a><span class="lineno"> 1106</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Alloc></div><div class="line"><a name="l01107"></a><span class="lineno"> 1107</span>  <span class="keyword">struct </span>_Deleter</div><div class="line"><a name="l01108"></a><span class="lineno"> 1108</span>  {</div><div class="line"><a name="l01109"></a><span class="lineno"> 1109</span>  <span class="keywordtype">void</span> operator()(<span class="keyword">typename</span> _Alloc::value_type* __ptr)</div><div class="line"><a name="l01110"></a><span class="lineno"> 1110</span>  {</div><div class="line"><a name="l01111"></a><span class="lineno"> 1111</span>  <a class="code" href="a04125.html">__allocated_ptr<_Alloc></a> __guard{ _M_alloc, __ptr };</div><div class="line"><a name="l01112"></a><span class="lineno"> 1112</span>  <a class="code" href="a04085.html#ac73f3d164cf01c9d61b44d42c30db3d3">allocator_traits<_Alloc>::destroy</a>(_M_alloc, __guard.get());</div><div class="line"><a name="l01113"></a><span class="lineno"> 1113</span>  }</div><div class="line"><a name="l01114"></a><span class="lineno"> 1114</span>  _Alloc _M_alloc;</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> </div><div class="line"><a name="l01117"></a><span class="lineno"> 1117</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Alloc, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l01118"></a><span class="lineno"> 1118</span>  __shared_ptr(_Sp_make_shared_tag __tag, <span class="keyword">const</span> _Alloc& __a,</div><div class="line"><a name="l01119"></a><span class="lineno"> 1119</span>  _Args&&... __args)</div><div class="line"><a name="l01120"></a><span class="lineno"> 1120</span>  : _M_ptr(), _M_refcount()</div><div class="line"><a name="l01121"></a><span class="lineno"> 1121</span>  {</div><div class="line"><a name="l01122"></a><span class="lineno"> 1122</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="a04085.html">allocator_traits<_Alloc>::template</a></div><div class="line"><a name="l01123"></a><span class="lineno"> 1123</span>  rebind_traits<typename std::remove_cv<_Tp>::type> __traits;</div><div class="line"><a name="l01124"></a><span class="lineno"> 1124</span>  _Deleter<typename __traits::allocator_type> __del = { __a };</div><div class="line"><a name="l01125"></a><span class="lineno"> 1125</span>  <span class="keyword">auto</span> __guard = <a class="code" href="a01487.html#a1fa3f7679aec1619e37fddf24eb70a11">std::__allocate_guarded</a>(__del._M_alloc);</div><div class="line"><a name="l01126"></a><span class="lineno"> 1126</span>  <span class="keyword">auto</span> __ptr = __guard.get();</div><div class="line"><a name="l01127"></a><span class="lineno"> 1127</span>  <span class="comment">// _GLIBCXX_RESOLVE_LIB_DEFECTS</span></div><div class="line"><a name="l01128"></a><span class="lineno"> 1128</span>  <span class="comment">// 2070. allocate_shared should use allocator_traits<A>::construct</span></div><div class="line"><a name="l01129"></a><span class="lineno"> 1129</span>  __traits::construct(__del._M_alloc, __ptr,</div><div class="line"><a name="l01130"></a><span class="lineno"> 1130</span>  std::forward<_Args>(__args)...);</div><div class="line"><a name="l01131"></a><span class="lineno"> 1131</span>  __guard = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l01132"></a><span class="lineno"> 1132</span>  __shared_count<_Lp> __count(__ptr, __del, __del._M_alloc);</div><div class="line"><a name="l01133"></a><span class="lineno"> 1133</span>  _M_refcount._M_swap(__count);</div><div class="line"><a name="l01134"></a><span class="lineno"> 1134</span>  _M_ptr = __ptr;</div><div class="line"><a name="l01135"></a><span class="lineno"> 1135</span>  __enable_shared_from_this_helper(_M_refcount, _M_ptr, _M_ptr);</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> <span class="preprocessor">#endif</span></div><div class="line"><a name="l01138"></a><span class="lineno"> 1138</span> </div><div class="line"><a name="l01139"></a><span class="lineno"> 1139</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1, _Lock_policy _Lp1, <span class="keyword">typename</span> _Alloc,</div><div class="line"><a name="l01140"></a><span class="lineno"> 1140</span>  <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l01141"></a><span class="lineno"> 1141</span>  <span class="keyword">friend</span> __shared_ptr<_Tp1, _Lp1></div><div class="line"><a name="l01142"></a><span class="lineno"> 1142</span>  __allocate_shared(<span class="keyword">const</span> _Alloc& __a, _Args&&... __args);</div><div class="line"><a name="l01143"></a><span class="lineno"> 1143</span> </div><div class="line"><a name="l01144"></a><span class="lineno"> 1144</span>  <span class="comment">// This constructor is used by __weak_ptr::lock() and</span></div><div class="line"><a name="l01145"></a><span class="lineno"> 1145</span>  <span class="comment">// shared_ptr::shared_ptr(const weak_ptr&, std::nothrow_t).</span></div><div class="line"><a name="l01146"></a><span class="lineno"> 1146</span>  __shared_ptr(<span class="keyword">const</span> __weak_ptr<_Tp, _Lp>& __r, std::nothrow_t)</div><div class="line"><a name="l01147"></a><span class="lineno"> 1147</span>  : _M_refcount(__r._M_refcount, std::nothrow)</div><div class="line"><a name="l01148"></a><span class="lineno"> 1148</span>  {</div><div class="line"><a name="l01149"></a><span class="lineno"> 1149</span>  _M_ptr = _M_refcount._M_get_use_count() ? __r._M_ptr : <span class="keyword">nullptr</span>;</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> </div><div class="line"><a name="l01152"></a><span class="lineno"> 1152</span>  <span class="keyword">friend</span> <span class="keyword">class </span>__weak_ptr<_Tp, _Lp>;</div><div class="line"><a name="l01153"></a><span class="lineno"> 1153</span> </div><div class="line"><a name="l01154"></a><span class="lineno"> 1154</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l01155"></a><span class="lineno"> 1155</span>  <span class="keywordtype">void</span>*</div><div class="line"><a name="l01156"></a><span class="lineno"> 1156</span>  _M_get_deleter(<span class="keyword">const</span> <a class="code" href="a01617.html">std::type_info</a>& __ti) <span class="keyword">const</span> noexcept</div><div class="line"><a name="l01157"></a><span class="lineno"> 1157</span>  { <span class="keywordflow">return</span> _M_refcount._M_get_deleter(__ti); }</div><div class="line"><a name="l01158"></a><span class="lineno"> 1158</span> </div><div class="line"><a name="l01159"></a><span class="lineno"> 1159</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1></div><div class="line"><a name="l01160"></a><span class="lineno"> 1160</span>  <span class="keyword">static</span> _Tp1*</div><div class="line"><a name="l01161"></a><span class="lineno"> 1161</span>  _S_raw_ptr(_Tp1* __ptr)</div><div class="line"><a name="l01162"></a><span class="lineno"> 1162</span>  { <span class="keywordflow">return</span> __ptr; }</div><div class="line"><a name="l01163"></a><span class="lineno"> 1163</span> </div><div class="line"><a name="l01164"></a><span class="lineno"> 1164</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1></div><div class="line"><a name="l01165"></a><span class="lineno"> 1165</span>  <span class="keyword">static</span> <span class="keyword">auto</span></div><div class="line"><a name="l01166"></a><span class="lineno"> 1166</span>  _S_raw_ptr(_Tp1 __ptr) -> decltype(<a class="code" href="a01431.html#ga145a38ffdb1e846f389c2841897665b7">std::__addressof</a>(*__ptr))</div><div class="line"><a name="l01167"></a><span class="lineno"> 1167</span>  { <span class="keywordflow">return</span> <a class="code" href="a01431.html#ga145a38ffdb1e846f389c2841897665b7">std::__addressof</a>(*__ptr); }</div><div class="line"><a name="l01168"></a><span class="lineno"> 1168</span> </div><div class="line"><a name="l01169"></a><span class="lineno"> 1169</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1, _Lock_policy _Lp1> <span class="keyword">friend</span> <span class="keyword">class </span>__shared_ptr;</div><div class="line"><a name="l01170"></a><span class="lineno"> 1170</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1, _Lock_policy _Lp1> <span class="keyword">friend</span> <span class="keyword">class </span>__weak_ptr;</div><div class="line"><a name="l01171"></a><span class="lineno"> 1171</span> </div><div class="line"><a name="l01172"></a><span class="lineno"> 1172</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Del, <span class="keyword">typename</span> _Tp1, _Lock_policy _Lp1></div><div class="line"><a name="l01173"></a><span class="lineno"> 1173</span>  <span class="keyword">friend</span> _Del* <a class="code" href="a01425.html#ga6f732e9d75b33511b0d0f8f8cc1c84e3">get_deleter</a>(<span class="keyword">const</span> __shared_ptr<_Tp1, _Lp1>&) noexcept;</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>  _Tp* _M_ptr; <span class="comment">// Contained pointer.</span></div><div class="line"><a name="l01176"></a><span class="lineno"> 1176</span>  __shared_count<_Lp> _M_refcount; <span class="comment">// Reference counter.</span></div><div class="line"><a name="l01177"></a><span class="lineno"> 1177</span>  };</div><div class="line"><a name="l01178"></a><span class="lineno"> 1178</span> </div><div class="line"><a name="l01179"></a><span class="lineno"> 1179</span> </div><div class="line"><a name="l01180"></a><span class="lineno"> 1180</span>  <span class="comment">// 20.7.2.2.7 shared_ptr comparisons</span></div><div class="line"><a name="l01181"></a><span class="lineno"> 1181</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1, <span class="keyword">typename</span> _Tp2, _Lock_policy _Lp></div><div class="line"><a name="l01182"></a><span class="lineno"> 1182</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l01183"></a><span class="lineno"> 1183</span>  operator==(<span class="keyword">const</span> __shared_ptr<_Tp1, _Lp>& __a,</div><div class="line"><a name="l01184"></a><span class="lineno"> 1184</span>  <span class="keyword">const</span> __shared_ptr<_Tp2, _Lp>& __b) noexcept</div><div class="line"><a name="l01185"></a><span class="lineno"> 1185</span>  { <span class="keywordflow">return</span> __a.get() == __b.get(); }</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>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, _Lock_policy _Lp></div><div class="line"><a name="l01188"></a><span class="lineno"> 1188</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l01189"></a><span class="lineno"> 1189</span>  operator==(<span class="keyword">const</span> __shared_ptr<_Tp, _Lp>& __a, nullptr_t) noexcept</div><div class="line"><a name="l01190"></a><span class="lineno"> 1190</span>  { <span class="keywordflow">return</span> !__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="keyword">template</span><<span class="keyword">typename</span> _Tp, _Lock_policy _Lp></div><div class="line"><a name="l01193"></a><span class="lineno"> 1193</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l01194"></a><span class="lineno"> 1194</span>  operator==(nullptr_t, <span class="keyword">const</span> __shared_ptr<_Tp, _Lp>& __a) noexcept</div><div class="line"><a name="l01195"></a><span class="lineno"> 1195</span>  { <span class="keywordflow">return</span> !__a; }</div><div class="line"><a name="l01196"></a><span class="lineno"> 1196</span> </div><div class="line"><a name="l01197"></a><span class="lineno"> 1197</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1, <span class="keyword">typename</span> _Tp2, _Lock_policy _Lp></div><div class="line"><a name="l01198"></a><span class="lineno"> 1198</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l01199"></a><span class="lineno"> 1199</span>  operator!=(<span class="keyword">const</span> __shared_ptr<_Tp1, _Lp>& __a,</div><div class="line"><a name="l01200"></a><span class="lineno"> 1200</span>  <span class="keyword">const</span> __shared_ptr<_Tp2, _Lp>& __b) noexcept</div><div class="line"><a name="l01201"></a><span class="lineno"> 1201</span>  { <span class="keywordflow">return</span> __a.get() != __b.get(); }</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>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, _Lock_policy _Lp></div><div class="line"><a name="l01204"></a><span class="lineno"> 1204</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l01205"></a><span class="lineno"> 1205</span>  operator!=(<span class="keyword">const</span> __shared_ptr<_Tp, _Lp>& __a, nullptr_t) noexcept</div><div class="line"><a name="l01206"></a><span class="lineno"> 1206</span>  { <span class="keywordflow">return</span> (<span class="keywordtype">bool</span>)__a; }</div><div class="line"><a name="l01207"></a><span class="lineno"> 1207</span> </div><div class="line"><a name="l01208"></a><span class="lineno"> 1208</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, _Lock_policy _Lp></div><div class="line"><a name="l01209"></a><span class="lineno"> 1209</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l01210"></a><span class="lineno"> 1210</span>  operator!=(nullptr_t, <span class="keyword">const</span> __shared_ptr<_Tp, _Lp>& __a) noexcept</div><div class="line"><a name="l01211"></a><span class="lineno"> 1211</span>  { <span class="keywordflow">return</span> (<span class="keywordtype">bool</span>)__a; }</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="keyword">template</span><<span class="keyword">typename</span> _Tp1, <span class="keyword">typename</span> _Tp2, _Lock_policy _Lp></div><div class="line"><a name="l01214"></a><span class="lineno"> 1214</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l01215"></a><span class="lineno"> 1215</span>  operator<(const __shared_ptr<_Tp1, _Lp>& __a,</div><div class="line"><a name="l01216"></a><span class="lineno"> 1216</span>  <span class="keyword">const</span> __shared_ptr<_Tp2, _Lp>& __b) noexcept</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="keyword">typedef</span> <span class="keyword">typename</span> std::common_type<_Tp1*, _Tp2*>::type _CT;</div><div class="line"><a name="l01219"></a><span class="lineno"> 1219</span>  <span class="keywordflow">return</span> <a class="code" href="a06417.html">std::less<_CT></a>()(__a.get(), __b.get());</div><div class="line"><a name="l01220"></a><span class="lineno"> 1220</span>  }</div><div class="line"><a name="l01221"></a><span class="lineno"> 1221</span> </div><div class="line"><a name="l01222"></a><span class="lineno"> 1222</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, _Lock_policy _Lp></div><div class="line"><a name="l01223"></a><span class="lineno"> 1223</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l01224"></a><span class="lineno"> 1224</span>  operator<(const __shared_ptr<_Tp, _Lp>& __a, nullptr_t) noexcept</div><div class="line"><a name="l01225"></a><span class="lineno"> 1225</span>  { <span class="keywordflow">return</span> <a class="code" href="a06417.html">std::less<_Tp*></a>()(__a.get(), <span class="keyword">nullptr</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="keyword">template</span><<span class="keyword">typename</span> _Tp, _Lock_policy _Lp></div><div class="line"><a name="l01228"></a><span class="lineno"> 1228</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l01229"></a><span class="lineno"> 1229</span>  operator<(nullptr_t, const __shared_ptr<_Tp, _Lp>& __a) noexcept</div><div class="line"><a name="l01230"></a><span class="lineno"> 1230</span>  { <span class="keywordflow">return</span> <a class="code" href="a06417.html">std::less<_Tp*></a>()(<span class="keyword">nullptr</span>, __a.get()); }</div><div class="line"><a name="l01231"></a><span class="lineno"> 1231</span> </div><div class="line"><a name="l01232"></a><span class="lineno"> 1232</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1, <span class="keyword">typename</span> _Tp2, _Lock_policy _Lp></div><div class="line"><a name="l01233"></a><span class="lineno"> 1233</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l01234"></a><span class="lineno"> 1234</span>  operator<=(const __shared_ptr<_Tp1, _Lp>& __a,</div><div class="line"><a name="l01235"></a><span class="lineno"> 1235</span>  <span class="keyword">const</span> __shared_ptr<_Tp2, _Lp>& __b) noexcept</div><div class="line"><a name="l01236"></a><span class="lineno"> 1236</span>  { <span class="keywordflow">return</span> !(__b < __a); }</div><div class="line"><a name="l01237"></a><span class="lineno"> 1237</span> </div><div class="line"><a name="l01238"></a><span class="lineno"> 1238</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, _Lock_policy _Lp></div><div class="line"><a name="l01239"></a><span class="lineno"> 1239</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l01240"></a><span class="lineno"> 1240</span>  operator<=(const __shared_ptr<_Tp, _Lp>& __a, nullptr_t) noexcept</div><div class="line"><a name="l01241"></a><span class="lineno"> 1241</span>  { <span class="keywordflow">return</span> !(<span class="keyword">nullptr</span> < __a); }</div><div class="line"><a name="l01242"></a><span class="lineno"> 1242</span> </div><div class="line"><a name="l01243"></a><span class="lineno"> 1243</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, _Lock_policy _Lp></div><div class="line"><a name="l01244"></a><span class="lineno"> 1244</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l01245"></a><span class="lineno"> 1245</span>  operator<=(nullptr_t, const __shared_ptr<_Tp, _Lp>& __a) noexcept</div><div class="line"><a name="l01246"></a><span class="lineno"> 1246</span>  { <span class="keywordflow">return</span> !(__a < <span class="keyword">nullptr</span>); }</div><div class="line"><a name="l01247"></a><span class="lineno"> 1247</span> </div><div class="line"><a name="l01248"></a><span class="lineno"> 1248</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1, <span class="keyword">typename</span> _Tp2, _Lock_policy _Lp></div><div class="line"><a name="l01249"></a><span class="lineno"> 1249</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l01250"></a><span class="lineno"> 1250</span>  operator>(<span class="keyword">const</span> __shared_ptr<_Tp1, _Lp>& __a,</div><div class="line"><a name="l01251"></a><span class="lineno"> 1251</span>  <span class="keyword">const</span> __shared_ptr<_Tp2, _Lp>& __b) noexcept</div><div class="line"><a name="l01252"></a><span class="lineno"> 1252</span>  { <span class="keywordflow">return</span> (__b < __a); }</div><div class="line"><a name="l01253"></a><span class="lineno"> 1253</span> </div><div class="line"><a name="l01254"></a><span class="lineno"> 1254</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, _Lock_policy _Lp></div><div class="line"><a name="l01255"></a><span class="lineno"> 1255</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l01256"></a><span class="lineno"> 1256</span>  operator>(<span class="keyword">const</span> __shared_ptr<_Tp, _Lp>& __a, nullptr_t) noexcept</div><div class="line"><a name="l01257"></a><span class="lineno"> 1257</span>  { <span class="keywordflow">return</span> <a class="code" href="a06417.html">std::less<_Tp*></a>()(<span class="keyword">nullptr</span>, __a.get()); }</div><div class="line"><a name="l01258"></a><span class="lineno"> 1258</span> </div><div class="line"><a name="l01259"></a><span class="lineno"> 1259</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, _Lock_policy _Lp></div><div class="line"><a name="l01260"></a><span class="lineno"> 1260</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l01261"></a><span class="lineno"> 1261</span>  operator>(nullptr_t, <span class="keyword">const</span> __shared_ptr<_Tp, _Lp>& __a) noexcept</div><div class="line"><a name="l01262"></a><span class="lineno"> 1262</span>  { <span class="keywordflow">return</span> <a class="code" href="a06417.html">std::less<_Tp*></a>()(__a.get(), <span class="keyword">nullptr</span>); }</div><div class="line"><a name="l01263"></a><span class="lineno"> 1263</span> </div><div class="line"><a name="l01264"></a><span class="lineno"> 1264</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1, <span class="keyword">typename</span> _Tp2, _Lock_policy _Lp></div><div class="line"><a name="l01265"></a><span class="lineno"> 1265</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l01266"></a><span class="lineno"> 1266</span>  operator>=(<span class="keyword">const</span> __shared_ptr<_Tp1, _Lp>& __a,</div><div class="line"><a name="l01267"></a><span class="lineno"> 1267</span>  <span class="keyword">const</span> __shared_ptr<_Tp2, _Lp>& __b) noexcept</div><div class="line"><a name="l01268"></a><span class="lineno"> 1268</span>  { <span class="keywordflow">return</span> !(__a < __b); }</div><div class="line"><a name="l01269"></a><span class="lineno"> 1269</span> </div><div class="line"><a name="l01270"></a><span class="lineno"> 1270</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, _Lock_policy _Lp></div><div class="line"><a name="l01271"></a><span class="lineno"> 1271</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l01272"></a><span class="lineno"> 1272</span>  operator>=(<span class="keyword">const</span> __shared_ptr<_Tp, _Lp>& __a, nullptr_t) noexcept</div><div class="line"><a name="l01273"></a><span class="lineno"> 1273</span>  { <span class="keywordflow">return</span> !(__a < <span class="keyword">nullptr</span>); }</div><div class="line"><a name="l01274"></a><span class="lineno"> 1274</span> </div><div class="line"><a name="l01275"></a><span class="lineno"> 1275</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, _Lock_policy _Lp></div><div class="line"><a name="l01276"></a><span class="lineno"> 1276</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l01277"></a><span class="lineno"> 1277</span>  operator>=(nullptr_t, <span class="keyword">const</span> __shared_ptr<_Tp, _Lp>& __a) noexcept</div><div class="line"><a name="l01278"></a><span class="lineno"> 1278</span>  { <span class="keywordflow">return</span> !(<span class="keyword">nullptr</span> < __a); }</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>  <span class="keyword">template</span><<span class="keyword">typename</span> _Sp></div><div class="line"><a name="l01281"></a><span class="lineno"> 1281</span>  <span class="keyword">struct </span>_Sp_less : <span class="keyword">public</span> <a class="code" href="a06353.html">binary_function</a><_Sp, _Sp, bool></div><div class="line"><a name="l01282"></a><span class="lineno"> 1282</span>  {</div><div class="line"><a name="l01283"></a><span class="lineno"> 1283</span>  <span class="keywordtype">bool</span></div><div class="line"><a name="l01284"></a><span class="lineno"> 1284</span>  operator()(<span class="keyword">const</span> _Sp& __lhs, <span class="keyword">const</span> _Sp& __rhs) <span class="keyword">const</span> noexcept</div><div class="line"><a name="l01285"></a><span class="lineno"> 1285</span>  {</div><div class="line"><a name="l01286"></a><span class="lineno"> 1286</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> _Sp::element_type element_type;</div><div class="line"><a name="l01287"></a><span class="lineno"> 1287</span>  <span class="keywordflow">return</span> <a class="code" href="a06417.html">std::less<element_type*></a>()(__lhs.get(), __rhs.get());</div><div class="line"><a name="l01288"></a><span class="lineno"> 1288</span>  }</div><div class="line"><a name="l01289"></a><span class="lineno"> 1289</span>  };</div><div class="line"><a name="l01290"></a><span class="lineno"> 1290</span> </div><div class="line"><a name="l01291"></a><span class="lineno"> 1291</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, _Lock_policy _Lp></div><div class="line"><a name="l01292"></a><span class="lineno"> 1292</span>  <span class="keyword">struct </span><a class="code" href="a06417.html">less</a><__shared_ptr<_Tp, _Lp>></div><div class="line"><a name="l01293"></a><span class="lineno"> 1293</span>  : <span class="keyword">public</span> _Sp_less<__shared_ptr<_Tp, _Lp>></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>  <span class="comment">// 20.7.2.2.8 shared_ptr specialized algorithms.</span></div><div class="line"><a name="l01297"></a><span class="lineno"> 1297</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, _Lock_policy _Lp></div><div class="line"><a name="l01298"></a><span class="lineno"> 1298</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span></div><div class="line"><a name="l01299"></a><span class="lineno"> 1299</span>  swap(__shared_ptr<_Tp, _Lp>& __a, __shared_ptr<_Tp, _Lp>& __b) noexcept</div><div class="line"><a name="l01300"></a><span class="lineno"> 1300</span>  { __a.swap(__b); }</div><div class="line"><a name="l01301"></a><span class="lineno"> 1301</span> </div><div class="line"><a name="l01302"></a><span class="lineno"> 1302</span>  <span class="comment">// 20.7.2.2.9 shared_ptr casts</span></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>  <span class="comment">// The seemingly equivalent code:</span></div><div class="line"><a name="l01305"></a><span class="lineno"> 1305</span>  <span class="comment">// shared_ptr<_Tp, _Lp>(static_cast<_Tp*>(__r.get()))</span></div><div class="line"><a name="l01306"></a><span class="lineno"> 1306</span>  <span class="comment">// will eventually result in undefined behaviour, attempting to</span></div><div class="line"><a name="l01307"></a><span class="lineno"> 1307</span>  <span class="comment">// delete the same object twice.</span><span class="comment"></span></div><div class="line"><a name="l01308"></a><span class="lineno"> 1308</span> <span class="comment"> /// static_pointer_cast</span></div><div class="line"><a name="l01309"></a><span class="lineno"> 1309</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Tp1, _Lock_policy _Lp></div><div class="line"><a name="l01310"></a><span class="lineno"> 1310</span>  <span class="keyword">inline</span> __shared_ptr<_Tp, _Lp></div><div class="line"><a name="l01311"></a><span class="lineno"><a class="line" href="a01487.html#a6a221c308f0ca0e44b5fffa32a6d4595"> 1311</a></span>  static_pointer_cast(<span class="keyword">const</span> __shared_ptr<_Tp1, _Lp>& __r) noexcept</div><div class="line"><a name="l01312"></a><span class="lineno"> 1312</span>  { <span class="keywordflow">return</span> __shared_ptr<_Tp, _Lp>(__r, <span class="keyword">static_cast<</span>_Tp*<span class="keyword">></span>(__r.get())); }</div><div class="line"><a name="l01313"></a><span class="lineno"> 1313</span> </div><div class="line"><a name="l01314"></a><span class="lineno"> 1314</span>  <span class="comment">// The seemingly equivalent code:</span></div><div class="line"><a name="l01315"></a><span class="lineno"> 1315</span>  <span class="comment">// shared_ptr<_Tp, _Lp>(const_cast<_Tp*>(__r.get()))</span></div><div class="line"><a name="l01316"></a><span class="lineno"> 1316</span>  <span class="comment">// will eventually result in undefined behaviour, attempting to</span></div><div class="line"><a name="l01317"></a><span class="lineno"> 1317</span>  <span class="comment">// delete the same object twice.</span><span class="comment"></span></div><div class="line"><a name="l01318"></a><span class="lineno"> 1318</span> <span class="comment"> /// const_pointer_cast</span></div><div class="line"><a name="l01319"></a><span class="lineno"> 1319</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Tp1, _Lock_policy _Lp></div><div class="line"><a name="l01320"></a><span class="lineno"> 1320</span>  <span class="keyword">inline</span> __shared_ptr<_Tp, _Lp></div><div class="line"><a name="l01321"></a><span class="lineno"><a class="line" href="a01487.html#aa2f97c555285b7c2e771b789ccd7b126"> 1321</a></span>  const_pointer_cast(<span class="keyword">const</span> __shared_ptr<_Tp1, _Lp>& __r) noexcept</div><div class="line"><a name="l01322"></a><span class="lineno"> 1322</span>  { <span class="keywordflow">return</span> __shared_ptr<_Tp, _Lp>(__r, <span class="keyword">const_cast<</span>_Tp*<span class="keyword">></span>(__r.get())); }</div><div class="line"><a name="l01323"></a><span class="lineno"> 1323</span> </div><div class="line"><a name="l01324"></a><span class="lineno"> 1324</span>  <span class="comment">// The seemingly equivalent code:</span></div><div class="line"><a name="l01325"></a><span class="lineno"> 1325</span>  <span class="comment">// shared_ptr<_Tp, _Lp>(dynamic_cast<_Tp*>(__r.get()))</span></div><div class="line"><a name="l01326"></a><span class="lineno"> 1326</span>  <span class="comment">// will eventually result in undefined behaviour, attempting to</span></div><div class="line"><a name="l01327"></a><span class="lineno"> 1327</span>  <span class="comment">// delete the same object twice.</span><span class="comment"></span></div><div class="line"><a name="l01328"></a><span class="lineno"> 1328</span> <span class="comment"> /// dynamic_pointer_cast</span></div><div class="line"><a name="l01329"></a><span class="lineno"> 1329</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Tp1, _Lock_policy _Lp></div><div class="line"><a name="l01330"></a><span class="lineno"> 1330</span>  <span class="keyword">inline</span> __shared_ptr<_Tp, _Lp></div><div class="line"><a name="l01331"></a><span class="lineno"><a class="line" href="a01487.html#aea22d7ec8d3648b381cf98d0ba570e9b"> 1331</a></span>  dynamic_pointer_cast(<span class="keyword">const</span> __shared_ptr<_Tp1, _Lp>& __r) noexcept</div><div class="line"><a name="l01332"></a><span class="lineno"> 1332</span>  {</div><div class="line"><a name="l01333"></a><span class="lineno"> 1333</span>  <span class="keywordflow">if</span> (_Tp* __p = dynamic_cast<_Tp*>(__r.get()))</div><div class="line"><a name="l01334"></a><span class="lineno"> 1334</span>  <span class="keywordflow">return</span> __shared_ptr<_Tp, _Lp>(__r, __p);</div><div class="line"><a name="l01335"></a><span class="lineno"> 1335</span>  <span class="keywordflow">return</span> __shared_ptr<_Tp, _Lp>();</div><div class="line"><a name="l01336"></a><span class="lineno"> 1336</span>  }</div><div class="line"><a name="l01337"></a><span class="lineno"> 1337</span> </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>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, _Lock_policy _Lp></div><div class="line"><a name="l01340"></a><span class="lineno"> 1340</span>  <span class="keyword">class </span>__weak_ptr</div><div class="line"><a name="l01341"></a><span class="lineno"> 1341</span>  {</div><div class="line"><a name="l01342"></a><span class="lineno"> 1342</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Ptr></div><div class="line"><a name="l01343"></a><span class="lineno"> 1343</span>  <span class="keyword">using</span> _Convertible</div><div class="line"><a name="l01344"></a><span class="lineno"> 1344</span>  = <span class="keyword">typename</span> enable_if<is_convertible<_Ptr, _Tp*>::value>::type;</div><div class="line"><a name="l01345"></a><span class="lineno"> 1345</span> </div><div class="line"><a name="l01346"></a><span class="lineno"> 1346</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l01347"></a><span class="lineno"> 1347</span>  <span class="keyword">typedef</span> _Tp element_type;</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>  constexpr __weak_ptr() noexcept</div><div class="line"><a name="l01350"></a><span class="lineno"> 1350</span>  : _M_ptr(<span class="keyword">nullptr</span>), _M_refcount()</div><div class="line"><a name="l01351"></a><span class="lineno"> 1351</span>  { }</div><div class="line"><a name="l01352"></a><span class="lineno"> 1352</span> </div><div class="line"><a name="l01353"></a><span class="lineno"> 1353</span>  __weak_ptr(<span class="keyword">const</span> __weak_ptr&) noexcept = <span class="keywordflow">default</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>  ~__weak_ptr() = <span class="keywordflow">default</span>;</div><div class="line"><a name="l01356"></a><span class="lineno"> 1356</span> </div><div class="line"><a name="l01357"></a><span class="lineno"> 1357</span>  <span class="comment">// The "obvious" converting constructor implementation:</span></div><div class="line"><a name="l01358"></a><span class="lineno"> 1358</span>  <span class="comment">//</span></div><div class="line"><a name="l01359"></a><span class="lineno"> 1359</span>  <span class="comment">// template<typename _Tp1></span></div><div class="line"><a name="l01360"></a><span class="lineno"> 1360</span>  <span class="comment">// __weak_ptr(const __weak_ptr<_Tp1, _Lp>& __r)</span></div><div class="line"><a name="l01361"></a><span class="lineno"> 1361</span>  <span class="comment">// : _M_ptr(__r._M_ptr), _M_refcount(__r._M_refcount) // never throws</span></div><div class="line"><a name="l01362"></a><span class="lineno"> 1362</span>  <span class="comment">// { }</span></div><div class="line"><a name="l01363"></a><span class="lineno"> 1363</span>  <span class="comment">//</span></div><div class="line"><a name="l01364"></a><span class="lineno"> 1364</span>  <span class="comment">// has a serious problem.</span></div><div class="line"><a name="l01365"></a><span class="lineno"> 1365</span>  <span class="comment">//</span></div><div class="line"><a name="l01366"></a><span class="lineno"> 1366</span>  <span class="comment">// __r._M_ptr may already have been invalidated. The _M_ptr(__r._M_ptr)</span></div><div class="line"><a name="l01367"></a><span class="lineno"> 1367</span>  <span class="comment">// conversion may require access to *__r._M_ptr (virtual inheritance).</span></div><div class="line"><a name="l01368"></a><span class="lineno"> 1368</span>  <span class="comment">//</span></div><div class="line"><a name="l01369"></a><span class="lineno"> 1369</span>  <span class="comment">// It is not possible to avoid spurious access violations since</span></div><div class="line"><a name="l01370"></a><span class="lineno"> 1370</span>  <span class="comment">// in multithreaded programs __r._M_ptr may be invalidated at any point.</span></div><div class="line"><a name="l01371"></a><span class="lineno"> 1371</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1, <span class="keyword">typename</span> = _Convertible<_Tp1*>></div><div class="line"><a name="l01372"></a><span class="lineno"> 1372</span>  __weak_ptr(<span class="keyword">const</span> __weak_ptr<_Tp1, _Lp>& __r) noexcept</div><div class="line"><a name="l01373"></a><span class="lineno"> 1373</span>  : _M_refcount(__r._M_refcount)</div><div class="line"><a name="l01374"></a><span class="lineno"> 1374</span>  { _M_ptr = __r.lock().get(); }</div><div class="line"><a name="l01375"></a><span class="lineno"> 1375</span> </div><div class="line"><a name="l01376"></a><span class="lineno"> 1376</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1, <span class="keyword">typename</span> = _Convertible<_Tp1*>></div><div class="line"><a name="l01377"></a><span class="lineno"> 1377</span>  __weak_ptr(<span class="keyword">const</span> __shared_ptr<_Tp1, _Lp>& __r) noexcept</div><div class="line"><a name="l01378"></a><span class="lineno"> 1378</span>  : _M_ptr(__r._M_ptr), _M_refcount(__r._M_refcount)</div><div class="line"><a name="l01379"></a><span class="lineno"> 1379</span>  { }</div><div class="line"><a name="l01380"></a><span class="lineno"> 1380</span> </div><div class="line"><a name="l01381"></a><span class="lineno"> 1381</span>  __weak_ptr(__weak_ptr&& __r) noexcept</div><div class="line"><a name="l01382"></a><span class="lineno"> 1382</span>  : _M_ptr(__r._M_ptr), _M_refcount(std::move(__r._M_refcount))</div><div class="line"><a name="l01383"></a><span class="lineno"> 1383</span>  { __r._M_ptr = <span class="keyword">nullptr</span>; }</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> _Tp1, <span class="keyword">typename</span> = _Convertible<_Tp1*>></div><div class="line"><a name="l01386"></a><span class="lineno"> 1386</span>  __weak_ptr(__weak_ptr<_Tp1, _Lp>&& __r) noexcept</div><div class="line"><a name="l01387"></a><span class="lineno"> 1387</span>  : _M_ptr(__r.lock().get()), _M_refcount(std::move(__r._M_refcount))</div><div class="line"><a name="l01388"></a><span class="lineno"> 1388</span>  { __r._M_ptr = <span class="keyword">nullptr</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>  __weak_ptr&</div><div class="line"><a name="l01391"></a><span class="lineno"> 1391</span>  operator=(<span class="keyword">const</span> __weak_ptr& __r) noexcept = <span class="keywordflow">default</span>;</div><div class="line"><a name="l01392"></a><span class="lineno"> 1392</span> </div><div class="line"><a name="l01393"></a><span class="lineno"> 1393</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1></div><div class="line"><a name="l01394"></a><span class="lineno"> 1394</span>  __weak_ptr&</div><div class="line"><a name="l01395"></a><span class="lineno"> 1395</span>  operator=(<span class="keyword">const</span> __weak_ptr<_Tp1, _Lp>& __r) noexcept</div><div class="line"><a name="l01396"></a><span class="lineno"> 1396</span>  {</div><div class="line"><a name="l01397"></a><span class="lineno"> 1397</span>  _M_ptr = __r.lock().get();</div><div class="line"><a name="l01398"></a><span class="lineno"> 1398</span>  _M_refcount = __r._M_refcount;</div><div class="line"><a name="l01399"></a><span class="lineno"> 1399</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</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> </div><div class="line"><a name="l01402"></a><span class="lineno"> 1402</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1></div><div class="line"><a name="l01403"></a><span class="lineno"> 1403</span>  __weak_ptr&</div><div class="line"><a name="l01404"></a><span class="lineno"> 1404</span>  operator=(<span class="keyword">const</span> __shared_ptr<_Tp1, _Lp>& __r) noexcept</div><div class="line"><a name="l01405"></a><span class="lineno"> 1405</span>  {</div><div class="line"><a name="l01406"></a><span class="lineno"> 1406</span>  _M_ptr = __r._M_ptr;</div><div class="line"><a name="l01407"></a><span class="lineno"> 1407</span>  _M_refcount = __r._M_refcount;</div><div class="line"><a name="l01408"></a><span class="lineno"> 1408</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</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> </div><div class="line"><a name="l01411"></a><span class="lineno"> 1411</span>  __weak_ptr&</div><div class="line"><a name="l01412"></a><span class="lineno"> 1412</span>  operator=(__weak_ptr&& __r) noexcept</div><div class="line"><a name="l01413"></a><span class="lineno"> 1413</span>  {</div><div class="line"><a name="l01414"></a><span class="lineno"> 1414</span>  _M_ptr = __r._M_ptr;</div><div class="line"><a name="l01415"></a><span class="lineno"> 1415</span>  _M_refcount = std::move(__r._M_refcount);</div><div class="line"><a name="l01416"></a><span class="lineno"> 1416</span>  __r._M_ptr = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l01417"></a><span class="lineno"> 1417</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l01418"></a><span class="lineno"> 1418</span>  }</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">template</span><<span class="keyword">typename</span> _Tp1></div><div class="line"><a name="l01421"></a><span class="lineno"> 1421</span>  __weak_ptr&</div><div class="line"><a name="l01422"></a><span class="lineno"> 1422</span>  operator=(__weak_ptr<_Tp1, _Lp>&& __r) noexcept</div><div class="line"><a name="l01423"></a><span class="lineno"> 1423</span>  {</div><div class="line"><a name="l01424"></a><span class="lineno"> 1424</span>  _M_ptr = __r.lock().get();</div><div class="line"><a name="l01425"></a><span class="lineno"> 1425</span>  _M_refcount = std::move(__r._M_refcount);</div><div class="line"><a name="l01426"></a><span class="lineno"> 1426</span>  __r._M_ptr = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l01427"></a><span class="lineno"> 1427</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</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> </div><div class="line"><a name="l01430"></a><span class="lineno"> 1430</span>  __shared_ptr<_Tp, _Lp></div><div class="line"><a name="l01431"></a><span class="lineno"> 1431</span>  <a class="code" href="a01426.html#ga82fa606b1427f731ac64bb8ac49221f3">lock</a>() <span class="keyword">const</span> noexcept</div><div class="line"><a name="l01432"></a><span class="lineno"> 1432</span>  { <span class="keywordflow">return</span> __shared_ptr<element_type, _Lp>(*<span class="keyword">this</span>, std::nothrow); }</div><div class="line"><a name="l01433"></a><span class="lineno"> 1433</span> </div><div class="line"><a name="l01434"></a><span class="lineno"> 1434</span>  <span class="keywordtype">long</span></div><div class="line"><a name="l01435"></a><span class="lineno"> 1435</span>  use_count() <span class="keyword">const</span> noexcept</div><div class="line"><a name="l01436"></a><span class="lineno"> 1436</span>  { <span class="keywordflow">return</span> _M_refcount._M_get_use_count(); }</div><div class="line"><a name="l01437"></a><span class="lineno"> 1437</span> </div><div class="line"><a name="l01438"></a><span class="lineno"> 1438</span>  <span class="keywordtype">bool</span></div><div class="line"><a name="l01439"></a><span class="lineno"> 1439</span>  expired() <span class="keyword">const</span> noexcept</div><div class="line"><a name="l01440"></a><span class="lineno"> 1440</span>  { <span class="keywordflow">return</span> _M_refcount._M_get_use_count() == 0; }</div><div class="line"><a name="l01441"></a><span class="lineno"> 1441</span> </div><div class="line"><a name="l01442"></a><span class="lineno"> 1442</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1></div><div class="line"><a name="l01443"></a><span class="lineno"> 1443</span>  <span class="keywordtype">bool</span></div><div class="line"><a name="l01444"></a><span class="lineno"> 1444</span>  owner_before(<span class="keyword">const</span> __shared_ptr<_Tp1, _Lp>& __rhs) <span class="keyword">const</span> noexcept</div><div class="line"><a name="l01445"></a><span class="lineno"> 1445</span>  { <span class="keywordflow">return</span> _M_refcount._M_less(__rhs._M_refcount); }</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>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1></div><div class="line"><a name="l01448"></a><span class="lineno"> 1448</span>  <span class="keywordtype">bool</span></div><div class="line"><a name="l01449"></a><span class="lineno"> 1449</span>  owner_before(<span class="keyword">const</span> __weak_ptr<_Tp1, _Lp>& __rhs) <span class="keyword">const</span> noexcept</div><div class="line"><a name="l01450"></a><span class="lineno"> 1450</span>  { <span class="keywordflow">return</span> _M_refcount._M_less(__rhs._M_refcount); }</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="keywordtype">void</span></div><div class="line"><a name="l01453"></a><span class="lineno"> 1453</span>  reset() noexcept</div><div class="line"><a name="l01454"></a><span class="lineno"> 1454</span>  { __weak_ptr().swap(*<span class="keyword">this</span>); }</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>  <span class="keywordtype">void</span></div><div class="line"><a name="l01457"></a><span class="lineno"> 1457</span>  swap(__weak_ptr& __s) noexcept</div><div class="line"><a name="l01458"></a><span class="lineno"> 1458</span>  {</div><div class="line"><a name="l01459"></a><span class="lineno"> 1459</span>  std::swap(_M_ptr, __s._M_ptr);</div><div class="line"><a name="l01460"></a><span class="lineno"> 1460</span>  _M_refcount._M_swap(__s._M_refcount);</div><div class="line"><a name="l01461"></a><span class="lineno"> 1461</span>  }</div><div class="line"><a name="l01462"></a><span class="lineno"> 1462</span> </div><div class="line"><a name="l01463"></a><span class="lineno"> 1463</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l01464"></a><span class="lineno"> 1464</span>  <span class="comment">// Used by __enable_shared_from_this.</span></div><div class="line"><a name="l01465"></a><span class="lineno"> 1465</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01466"></a><span class="lineno"> 1466</span>  _M_assign(_Tp* __ptr, <span class="keyword">const</span> __shared_count<_Lp>& __refcount) noexcept</div><div class="line"><a name="l01467"></a><span class="lineno"> 1467</span>  {</div><div class="line"><a name="l01468"></a><span class="lineno"> 1468</span>  _M_ptr = __ptr;</div><div class="line"><a name="l01469"></a><span class="lineno"> 1469</span>  _M_refcount = __refcount;</div><div class="line"><a name="l01470"></a><span class="lineno"> 1470</span>  }</div><div class="line"><a name="l01471"></a><span class="lineno"> 1471</span> </div><div class="line"><a name="l01472"></a><span class="lineno"> 1472</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1, _Lock_policy _Lp1> <span class="keyword">friend</span> <span class="keyword">class </span>__shared_ptr;</div><div class="line"><a name="l01473"></a><span class="lineno"> 1473</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1, _Lock_policy _Lp1> <span class="keyword">friend</span> <span class="keyword">class </span>__weak_ptr;</div><div class="line"><a name="l01474"></a><span class="lineno"> 1474</span>  <span class="keyword">friend</span> <span class="keyword">class </span>__enable_shared_from_this<_Tp, _Lp>;</div><div class="line"><a name="l01475"></a><span class="lineno"> 1475</span>  <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="a06109.html">enable_shared_from_this</a><_Tp>;</div><div class="line"><a name="l01476"></a><span class="lineno"> 1476</span> </div><div class="line"><a name="l01477"></a><span class="lineno"> 1477</span>  _Tp* _M_ptr; <span class="comment">// Contained pointer.</span></div><div class="line"><a name="l01478"></a><span class="lineno"> 1478</span>  __weak_count<_Lp> _M_refcount; <span class="comment">// Reference counter.</span></div><div class="line"><a name="l01479"></a><span class="lineno"> 1479</span>  };</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="comment">// 20.7.2.3.6 weak_ptr specialized algorithms.</span></div><div class="line"><a name="l01482"></a><span class="lineno"> 1482</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, _Lock_policy _Lp></div><div class="line"><a name="l01483"></a><span class="lineno"> 1483</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span></div><div class="line"><a name="l01484"></a><span class="lineno"> 1484</span>  swap(__weak_ptr<_Tp, _Lp>& __a, __weak_ptr<_Tp, _Lp>& __b) noexcept</div><div class="line"><a name="l01485"></a><span class="lineno"> 1485</span>  { __a.swap(__b); }</div><div class="line"><a name="l01486"></a><span class="lineno"> 1486</span> </div><div class="line"><a name="l01487"></a><span class="lineno"> 1487</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Tp1></div><div class="line"><a name="l01488"></a><span class="lineno"> 1488</span>  <span class="keyword">struct </span>_Sp_owner_less : <span class="keyword">public</span> <a class="code" href="a06353.html">binary_function</a><_Tp, _Tp, bool></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>  <span class="keywordtype">bool</span></div><div class="line"><a name="l01491"></a><span class="lineno"> 1491</span>  operator()(<span class="keyword">const</span> _Tp& __lhs, <span class="keyword">const</span> _Tp& __rhs) <span class="keyword">const</span> noexcept</div><div class="line"><a name="l01492"></a><span class="lineno"> 1492</span>  { <span class="keywordflow">return</span> __lhs.owner_before(__rhs); }</div><div class="line"><a name="l01493"></a><span class="lineno"> 1493</span> </div><div class="line"><a name="l01494"></a><span class="lineno"> 1494</span>  <span class="keywordtype">bool</span></div><div class="line"><a name="l01495"></a><span class="lineno"> 1495</span>  operator()(<span class="keyword">const</span> _Tp& __lhs, <span class="keyword">const</span> _Tp1& __rhs) <span class="keyword">const</span> noexcept</div><div class="line"><a name="l01496"></a><span class="lineno"> 1496</span>  { <span class="keywordflow">return</span> __lhs.owner_before(__rhs); }</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>  <span class="keywordtype">bool</span></div><div class="line"><a name="l01499"></a><span class="lineno"> 1499</span>  operator()(<span class="keyword">const</span> _Tp1& __lhs, <span class="keyword">const</span> _Tp& __rhs) <span class="keyword">const</span> noexcept</div><div class="line"><a name="l01500"></a><span class="lineno"> 1500</span>  { <span class="keywordflow">return</span> __lhs.owner_before(__rhs); }</div><div class="line"><a name="l01501"></a><span class="lineno"> 1501</span>  };</div><div class="line"><a name="l01502"></a><span class="lineno"> 1502</span> </div><div class="line"><a name="l01503"></a><span class="lineno"> 1503</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, _Lock_policy _Lp></div><div class="line"><a name="l01504"></a><span class="lineno"> 1504</span>  <span class="keyword">struct </span><a class="code" href="a06097.html">owner_less</a><__shared_ptr<_Tp, _Lp>></div><div class="line"><a name="l01505"></a><span class="lineno"> 1505</span>  : <span class="keyword">public</span> _Sp_owner_less<__shared_ptr<_Tp, _Lp>, __weak_ptr<_Tp, _Lp>></div><div class="line"><a name="l01506"></a><span class="lineno"> 1506</span>  { };</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>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, _Lock_policy _Lp></div><div class="line"><a name="l01509"></a><span class="lineno"> 1509</span>  <span class="keyword">struct </span><a class="code" href="a06097.html">owner_less</a><__weak_ptr<_Tp, _Lp>></div><div class="line"><a name="l01510"></a><span class="lineno"> 1510</span>  : <span class="keyword">public</span> _Sp_owner_less<__weak_ptr<_Tp, _Lp>, __shared_ptr<_Tp, _Lp>></div><div class="line"><a name="l01511"></a><span class="lineno"> 1511</span>  { };</div><div class="line"><a name="l01512"></a><span class="lineno"> 1512</span> </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>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, _Lock_policy _Lp></div><div class="line"><a name="l01515"></a><span class="lineno"> 1515</span>  <span class="keyword">class </span>__enable_shared_from_this</div><div class="line"><a name="l01516"></a><span class="lineno"> 1516</span>  {</div><div class="line"><a name="l01517"></a><span class="lineno"> 1517</span>  <span class="keyword">protected</span>:</div><div class="line"><a name="l01518"></a><span class="lineno"> 1518</span>  constexpr __enable_shared_from_this() noexcept { }</div><div class="line"><a name="l01519"></a><span class="lineno"> 1519</span> </div><div class="line"><a name="l01520"></a><span class="lineno"> 1520</span>  __enable_shared_from_this(<span class="keyword">const</span> __enable_shared_from_this&) noexcept { }</div><div class="line"><a name="l01521"></a><span class="lineno"> 1521</span> </div><div class="line"><a name="l01522"></a><span class="lineno"> 1522</span>  __enable_shared_from_this&</div><div class="line"><a name="l01523"></a><span class="lineno"> 1523</span>  operator=(<span class="keyword">const</span> __enable_shared_from_this&) noexcept</div><div class="line"><a name="l01524"></a><span class="lineno"> 1524</span>  { <span class="keywordflow">return</span> *<span class="keyword">this</span>; }</div><div class="line"><a name="l01525"></a><span class="lineno"> 1525</span> </div><div class="line"><a name="l01526"></a><span class="lineno"> 1526</span>  ~__enable_shared_from_this() { }</div><div class="line"><a name="l01527"></a><span class="lineno"> 1527</span> </div><div class="line"><a name="l01528"></a><span class="lineno"> 1528</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l01529"></a><span class="lineno"> 1529</span>  __shared_ptr<_Tp, _Lp></div><div class="line"><a name="l01530"></a><span class="lineno"> 1530</span>  shared_from_this()</div><div class="line"><a name="l01531"></a><span class="lineno"> 1531</span>  { <span class="keywordflow">return</span> __shared_ptr<_Tp, _Lp>(this->_M_weak_this); }</div><div class="line"><a name="l01532"></a><span class="lineno"> 1532</span> </div><div class="line"><a name="l01533"></a><span class="lineno"> 1533</span>  __shared_ptr<const _Tp, _Lp></div><div class="line"><a name="l01534"></a><span class="lineno"> 1534</span>  shared_from_this()<span class="keyword"> const</span></div><div class="line"><a name="l01535"></a><span class="lineno"> 1535</span> <span class="keyword"> </span>{ <span class="keywordflow">return</span> __shared_ptr<const _Tp, _Lp>(this->_M_weak_this); }</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>  <span class="keyword">private</span>:</div><div class="line"><a name="l01538"></a><span class="lineno"> 1538</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1></div><div class="line"><a name="l01539"></a><span class="lineno"> 1539</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l01540"></a><span class="lineno"> 1540</span>  _M_weak_assign(_Tp1* __p, <span class="keyword">const</span> __shared_count<_Lp>& __n) <span class="keyword">const</span> noexcept</div><div class="line"><a name="l01541"></a><span class="lineno"> 1541</span>  { _M_weak_this._M_assign(__p, __n); }</div><div class="line"><a name="l01542"></a><span class="lineno"> 1542</span> </div><div class="line"><a name="l01543"></a><span class="lineno"> 1543</span>  <span class="keyword">template</span><_Lock_policy _Lp1, <span class="keyword">typename</span> _Tp1, <span class="keyword">typename</span> _Tp2></div><div class="line"><a name="l01544"></a><span class="lineno"> 1544</span>  <span class="keyword">friend</span> <span class="keywordtype">void</span></div><div class="line"><a name="l01545"></a><span class="lineno"> 1545</span>  __enable_shared_from_this_helper(<span class="keyword">const</span> __shared_count<_Lp1>&,</div><div class="line"><a name="l01546"></a><span class="lineno"> 1546</span>  <span class="keyword">const</span> __enable_shared_from_this<_Tp1,</div><div class="line"><a name="l01547"></a><span class="lineno"> 1547</span>  _Lp1>*, <span class="keyword">const</span> _Tp2*) noexcept;</div><div class="line"><a name="l01548"></a><span class="lineno"> 1548</span> </div><div class="line"><a name="l01549"></a><span class="lineno"> 1549</span>  <span class="keyword">mutable</span> __weak_ptr<_Tp, _Lp> _M_weak_this;</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> </div><div class="line"><a name="l01552"></a><span class="lineno"> 1552</span>  <span class="keyword">template</span><_Lock_policy _Lp1, <span class="keyword">typename</span> _Tp1, <span class="keyword">typename</span> _Tp2></div><div class="line"><a name="l01553"></a><span class="lineno"> 1553</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span></div><div class="line"><a name="l01554"></a><span class="lineno"> 1554</span>  __enable_shared_from_this_helper(<span class="keyword">const</span> __shared_count<_Lp1>& __pn,</div><div class="line"><a name="l01555"></a><span class="lineno"> 1555</span>  <span class="keyword">const</span> __enable_shared_from_this<_Tp1,</div><div class="line"><a name="l01556"></a><span class="lineno"> 1556</span>  _Lp1>* __pe,</div><div class="line"><a name="l01557"></a><span class="lineno"> 1557</span>  <span class="keyword">const</span> _Tp2* __px) noexcept</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="keywordflow">if</span> (__pe != <span class="keyword">nullptr</span>)</div><div class="line"><a name="l01560"></a><span class="lineno"> 1560</span>  __pe->_M_weak_assign(const_cast<_Tp2*>(__px), __pn);</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> </div><div class="line"><a name="l01563"></a><span class="lineno"> 1563</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, _Lock_policy _Lp, <span class="keyword">typename</span> _Alloc, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l01564"></a><span class="lineno"> 1564</span>  <span class="keyword">inline</span> __shared_ptr<_Tp, _Lp></div><div class="line"><a name="l01565"></a><span class="lineno"> 1565</span>  __allocate_shared(<span class="keyword">const</span> _Alloc& __a, _Args&&... __args)</div><div class="line"><a name="l01566"></a><span class="lineno"> 1566</span>  {</div><div class="line"><a name="l01567"></a><span class="lineno"> 1567</span>  <span class="keywordflow">return</span> __shared_ptr<_Tp, _Lp>(_Sp_make_shared_tag(), __a,</div><div class="line"><a name="l01568"></a><span class="lineno"> 1568</span>  std::forward<_Args>(__args)...);</div><div class="line"><a name="l01569"></a><span class="lineno"> 1569</span>  }</div><div class="line"><a name="l01570"></a><span class="lineno"> 1570</span> </div><div class="line"><a name="l01571"></a><span class="lineno"> 1571</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, _Lock_policy _Lp, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l01572"></a><span class="lineno"> 1572</span>  <span class="keyword">inline</span> __shared_ptr<_Tp, _Lp></div><div class="line"><a name="l01573"></a><span class="lineno"> 1573</span>  __make_shared(_Args&&... __args)</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="keyword">typedef</span> <span class="keyword">typename</span> std::remove_const<_Tp>::type _Tp_nc;</div><div class="line"><a name="l01576"></a><span class="lineno"> 1576</span>  <span class="keywordflow">return</span> std::__allocate_shared<_Tp, _Lp>(<a class="code" href="a04137.html">std::allocator<_Tp_nc></a>(),</div><div class="line"><a name="l01577"></a><span class="lineno"> 1577</span>  std::forward<_Args>(__args)...);</div><div class="line"><a name="l01578"></a><span class="lineno"> 1578</span>  }</div><div class="line"><a name="l01579"></a><span class="lineno"> 1579</span> <span class="comment"></span></div><div class="line"><a name="l01580"></a><span class="lineno"> 1580</span> <span class="comment"> /// std::hash specialization for __shared_ptr.</span></div><div class="line"><a name="l01581"></a><span class="lineno"> 1581</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, _Lock_policy _Lp></div><div class="line"><a name="l01582"></a><span class="lineno"><a class="line" href="a06213.html"> 1582</a></span>  <span class="keyword">struct </span><a class="code" href="a03257.html">hash</a><__shared_ptr<_Tp, _Lp>></div><div class="line"><a name="l01583"></a><span class="lineno"> 1583</span>  : <span class="keyword">public</span> __hash_base<size_t, __shared_ptr<_Tp, _Lp>></div><div class="line"><a name="l01584"></a><span class="lineno"> 1584</span>  {</div><div class="line"><a name="l01585"></a><span class="lineno"> 1585</span>  <span class="keywordtype">size_t</span></div><div class="line"><a name="l01586"></a><span class="lineno"> 1586</span>  operator()(<span class="keyword">const</span> __shared_ptr<_Tp, _Lp>& __s) <span class="keyword">const</span> noexcept</div><div class="line"><a name="l01587"></a><span class="lineno"> 1587</span>  { <span class="keywordflow">return</span> <a class="code" href="a04897.html">std::hash<_Tp*></a>()(__s.get()); }</div><div class="line"><a name="l01588"></a><span class="lineno"> 1588</span>  };</div><div class="line"><a name="l01589"></a><span class="lineno"> 1589</span> </div><div class="line"><a name="l01590"></a><span class="lineno"> 1590</span> _GLIBCXX_END_NAMESPACE_VERSION</div><div class="line"><a name="l01591"></a><span class="lineno"> 1591</span> } <span class="comment">// namespace</span></div><div class="line"><a name="l01592"></a><span class="lineno"> 1592</span> </div><div class="line"><a name="l01593"></a><span class="lineno"> 1593</span> <span class="preprocessor">#endif // _SHARED_PTR_BASE_H</span></div><div class="ttc" id="a04897_html"><div class="ttname"><a href="a04897.html">std::hash< _Tp * ></a></div><div class="ttdoc">Partial specializations for pointer types. </div><div class="ttdef"><b>Definition:</b> <a href="a00335_source.html#l00062">functional_hash.h:62</a></div></div> <div class="ttc" id="a04085_html"><div class="ttname"><a href="a04085.html">std::allocator_traits</a></div><div class="ttdoc">Uniform interface to all allocator types. </div><div class="ttdef"><b>Definition:</b> <a href="a14746_source.html#l00083">bits/alloc_traits.h:83</a></div></div> <div class="ttc" id="a00968_html"><div class="ttname"><a href="a00968.html">aligned_buffer.h</a></div></div> <div class="ttc" id="a06121_html"><div class="ttname"><a href="a06121.html">std::bad_weak_ptr</a></div><div class="ttdoc">Exception possibly thrown by shared_ptr. </div><div class="ttdef"><b>Definition:</b> <a href="a00473_source.html#l00067">shared_ptr_base.h:67</a></div></div> <div class="ttc" id="a01487_html_a1fa3f7679aec1619e37fddf24eb70a11"><div class="ttname"><a href="a01487.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="a00260_source.html#l00100">allocated_ptr.h:100</a></div></div> <div class="ttc" id="a01426_html_ga82fa606b1427f731ac64bb8ac49221f3"><div class="ttname"><a href="a01426.html#ga82fa606b1427f731ac64bb8ac49221f3">std::lock</a></div><div class="ttdeci">void lock(_L1 &__l1, _L2 &__l2, _L3 &... __l3)</div><div class="ttdoc">Generic lock. </div><div class="ttdef"><b>Definition:</b> <a href="a00104_source.html#l00659">mutex:659</a></div></div> <div class="ttc" id="a04085_html_ac73f3d164cf01c9d61b44d42c30db3d3"><div class="ttname"><a href="a04085.html#ac73f3d164cf01c9d61b44d42c30db3d3">std::allocator_traits::destroy</a></div><div class="ttdeci">static void destroy(_Alloc &__a, _Tp *__p)</div><div class="ttdoc">Destroy an object of type _Tp. </div><div class="ttdef"><b>Definition:</b> <a href="a14746_source.html#l00413">bits/alloc_traits.h:413</a></div></div> <div class="ttc" id="a01593_html"><div class="ttname"><a href="a01593.html">std::exception</a></div><div class="ttdoc">Base class for all library exceptions. </div><div class="ttdef"><b>Definition:</b> <a href="a00020_source.html#l00059">exception:59</a></div></div> <div class="ttc" id="a09041_html"><div class="ttname"><a href="a09041.html">__gnu_cxx::__scoped_lock</a></div><div class="ttdoc">Scoped lock idiom. </div><div class="ttdef"><b>Definition:</b> <a href="a00986_source.html#l00231">concurrence.h:231</a></div></div> <div class="ttc" id="a06121_html_adfea1fffacfb8c9c39f374e16ec7315c"><div class="ttname"><a href="a06121.html#adfea1fffacfb8c9c39f374e16ec7315c">std::bad_weak_ptr::what</a></div><div class="ttdeci">virtual char const * what() const noexcept</div></div> <div class="ttc" id="a06109_html"><div class="ttname"><a href="a06109.html">std::enable_shared_from_this</a></div><div class="ttdoc">Base class allowing use of member function shared_from_this. </div><div class="ttdef"><b>Definition:</b> <a href="a00467_source.html#l00557">shared_ptr.h:557</a></div></div> <div class="ttc" id="a01420_html_gaf84b7343bdda8ed9615cd8f5a61c5e83"><div class="ttname"><a href="a01420.html#gaf84b7343bdda8ed9615cd8f5a61c5e83">std::operator*</a></div><div class="ttdeci">complex< _Tp > operator*(const complex< _Tp > &__x, const complex< _Tp > &__y)</div><div class="ttdoc">Return new complex value x times y. </div><div class="ttdef"><b>Definition:</b> <a href="a00047_source.html#l00386">complex:386</a></div></div> <div class="ttc" id="a04085_html_aad7d7b8604439d1ecf953a1b9a426e7b"><div class="ttname"><a href="a04085.html#aad7d7b8604439d1ecf953a1b9a426e7b">std::allocator_traits::construct</a></div><div class="ttdeci">static auto construct(_Alloc &__a, _Tp *__p, _Args &&... __args) -> decltype(_S_construct(__a, __p, std::forward< _Args >(__args)...))</div><div class="ttdoc">Construct an object of type _Tp. </div><div class="ttdef"><b>Definition:</b> <a href="a14746_source.html#l00400">bits/alloc_traits.h:400</a></div></div> <div class="ttc" id="a06417_html"><div class="ttname"><a href="a06417.html">std::less</a></div><div class="ttdoc">One of the comparison functors. </div><div class="ttdef"><b>Definition:</b> <a href="a00497_source.html#l00341">stl_function.h:341</a></div></div> <div class="ttc" id="a07325_html"><div class="ttname"><a href="a07325.html">std::auto_ptr</a></div><div class="ttdoc">A simple smart pointer providing strict ownership semantics. </div><div class="ttdef"><b>Definition:</b> <a href="a00671_source.html#l00087">auto_ptr.h:87</a></div></div> <div class="ttc" id="a01425_html_ga6f732e9d75b33511b0d0f8f8cc1c84e3"><div class="ttname"><a href="a01425.html#ga6f732e9d75b33511b0d0f8f8cc1c84e3">std::get_deleter</a></div><div class="ttdeci">_Del * get_deleter(const __shared_ptr< _Tp, _Lp > &__p) noexcept</div><div class="ttdoc">20.7.2.2.10 shared_ptr get_deleter </div><div class="ttdef"><b>Definition:</b> <a href="a00467_source.html#l00076">shared_ptr.h:76</a></div></div> <div class="ttc" id="a01431_html_ga145a38ffdb1e846f389c2841897665b7"><div class="ttname"><a href="a01431.html#ga145a38ffdb1e846f389c2841897665b7">std::__addressof</a></div><div class="ttdeci">_Tp * __addressof(_Tp &__r) noexcept</div><div class="ttdoc">Same as C++11 std::addressof. </div><div class="ttdef"><b>Definition:</b> <a href="a00395_source.html#l00047">move.h:47</a></div></div> <div class="ttc" id="a01487_html"><div class="ttname"><a href="a01487.html">std</a></div><div class="ttdoc">ISO C++ entities toplevel namespace is std. </div></div> <div class="ttc" id="a04129_html"><div class="ttname"><a href="a04129.html">std::allocator< void ></a></div><div class="ttdoc">allocator<void> specialization. </div><div class="ttdef"><b>Definition:</b> <a href="a00263_source.html#l00063">allocator.h:63</a></div></div> <div class="ttc" id="a01617_html"><div class="ttname"><a href="a01617.html">std::type_info</a></div><div class="ttdoc">Part of RTTI. </div><div class="ttdef"><b>Definition:</b> <a href="a00029_source.html#l00088">typeinfo:88</a></div></div> <div class="ttc" id="a06353_html"><div class="ttname"><a href="a06353.html">std::binary_function</a></div><div class="ttdef"><b>Definition:</b> <a href="a00497_source.html#l00118">stl_function.h:118</a></div></div> <div class="ttc" id="a06853_html"><div class="ttname"><a href="a06853.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="a00572_source.html#l00129">unique_ptr.h:129</a></div></div> <div class="ttc" id="a04137_html"><div class="ttname"><a href="a04137.html">std::allocator</a></div><div class="ttdoc">The standard allocator, as per [20.4]. </div><div class="ttdef"><b>Definition:</b> <a href="a00263_source.html#l00101">allocator.h:101</a></div></div> <div class="ttc" id="a04125_html"><div class="ttname"><a href="a04125.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="a00260_source.html#l00046">allocated_ptr.h:46</a></div></div> <div class="ttc" id="a06097_html"><div class="ttname"><a href="a06097.html">std::owner_less</a></div><div class="ttdoc">Primary template owner_less. </div><div class="ttdef"><b>Definition:</b> <a href="a00467_source.html#l00539">shared_ptr.h:539</a></div></div> <div class="ttc" id="a02249_html"><div class="ttname"><a href="a02249.html">std::reference_wrapper</a></div><div class="ttdoc">Primary class template for reference_wrapper. </div><div class="ttdef"><b>Definition:</b> <a href="a00065_source.html#l00398">functional:398</a></div></div> <div class="ttc" id="a06085_html"><div class="ttname"><a href="a06085.html">std::shared_ptr</a></div><div class="ttdoc">A smart pointer with reference-counted copy semantics. </div><div class="ttdef"><b>Definition:</b> <a href="a00467_source.html#l00093">shared_ptr.h:93</a></div></div> <div class="ttc" id="a00260_html"><div class="ttname"><a href="a00260.html">allocated_ptr.h</a></div></div> <div class="ttc" id="a03257_html"><div class="ttname"><a href="a03257.html">std::hash</a></div><div class="ttdoc">Primary class template hash. </div><div class="ttdef"><b>Definition:</b> <a href="a00149_source.html#l00134">system_error:134</a></div></div> <div class="ttc" id="a03557_html"><div class="ttname"><a href="a03557.html">std::is_void</a></div><div class="ttdoc">is_void </div><div class="ttdef"><b>Definition:</b> <a href="a00161_source.html#l00178">type_traits:178</a></div></div> <div class="ttc" id="a06093_html"><div class="ttname"><a href="a06093.html">std::weak_ptr</a></div><div class="ttdoc">A smart pointer with weak semantics. </div><div class="ttdef"><b>Definition:</b> <a href="a00467_source.html#l00470">shared_ptr.h:470</a></div></div> </div><!-- fragment --></div><!-- contents --> </div><!-- doc-content --> <!-- start footer part --> <div id="nav-path" class="navpath"><!-- id is needed for treeview function! --> <ul> <li class="navelem"><a class="el" href="dir_3a83f109ff04170a1f8448445d1bdcba.html">include</a></li><li class="navelem"><a class="el" href="dir_599c955538774c0249d4ddd97c0a9ae8.html">bits</a></li><li class="navelem"><a class="el" href="a00473.html">shared_ptr_base.h</a></li> <li class="footer">Generated by <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.13 </li> </ul> </div> </body> </html>