<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <meta http-equiv="X-UA-Compatible" content="IE=9"/> <meta name="generator" content="Doxygen 1.8.15"/> <meta name="viewport" content="width=device-width, initial-scale=1"/> <title>libstdc++: concurrence.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"> /* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */ $(document).ready(initResizable); /* @license-end */</script> <link href="doxygen.css" rel="stylesheet" type="text/css" /> </head> <body> <div id="top"><!-- do not remove this div, it is closed by doxygen! --> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td id="projectalign" style="padding-left: 0.5em;"> <div id="projectname">libstdc++ </div> </td> </tr> </tbody> </table> </div> <!-- end header part --> <!-- Generated by Doxygen 1.8.15 --> </div><!-- top --> <div id="side-nav" class="ui-resizable side-nav-resizable"> <div id="nav-tree"> <div id="nav-tree-contents"> <div id="nav-sync" class="sync"></div> </div> </div> <div id="splitbar" style="-moz-user-select:none;" class="ui-resizable-handle"> </div> </div> <script type="text/javascript"> /* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */ $(document).ready(function(){initNavTree('a01034_source.html','');}); /* @license-end */ </script> <div id="doc-content"> <div class="header"> <div class="headertitle"> <div class="title">concurrence.h</div> </div> </div><!--header--> <div class="contents"> <a href="a01034.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">// Support for concurrent programing -*- 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) 2003-2018 Free Software Foundation, Inc.</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">//</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// This file is part of the GNU ISO C++ Library. This library is free</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">// software; you can redistribute it and/or modify it under the</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// terms of the GNU General Public License as published by the</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// Free Software Foundation; either version 3, or (at your option)</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// any later version.</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// This library is distributed in the hope that it will be useful,</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment">// GNU General Public License for more details.</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">// Under Section 7 of GPL version 3, you are granted additional</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">// permissions described in the GCC Runtime Library Exception, version</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">// 3.1, as published by the Free Software Foundation.</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">// You should have received a copy of the GNU General Public License and</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">// a copy of the GCC Runtime Library Exception along with this program;</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">// <http://www.gnu.org/licenses/>.</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"></span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">/** @file ext/concurrence.h</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * This file is a GNU extension to the Standard C++ Library.</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> */</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#ifndef _CONCURRENCE_H</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#define _CONCURRENCE_H 1</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> </div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#pragma GCC system_header</span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#include <<a class="code" href="a00026.html">exception</a>></span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#include <bits/gthr.h></span> </div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#include <<a class="code" href="a00356.html">bits/functexcept.h</a>></span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#include <<a class="code" href="a00311.html">bits/cpp_type_traits.h</a>></span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#include <<a class="code" href="a01088.html">ext/type_traits.h</a>></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="keyword">namespace </span><a class="code" href="a01544.html">__gnu_cxx</a> _GLIBCXX_VISIBILITY(default)</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> {</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> _GLIBCXX_BEGIN_NAMESPACE_VERSION</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> </div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="comment">// Available locking policies:</span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="comment">// _S_single single-threaded code that doesn't need to be locked.</span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="comment">// _S_mutex multi-threaded code that requires additional support</span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="comment">// from gthr.h or abstraction layers in concurrence.h.</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="comment">// _S_atomic multi-threaded code using atomic operations.</span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keyword">enum</span> _Lock_policy { _S_single, _S_mutex, _S_atomic }; </div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> </div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="comment">// Compile time constant that indicates prefered locking policy in</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="comment">// the current configuration.</span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keyword">static</span> <span class="keyword">const</span> _Lock_policy __default_lock_policy = </div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="preprocessor">#ifdef __GTHREADS</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="preprocessor">#if (defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2) \</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="preprocessor"> && defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4))</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  _S_atomic;</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  _S_mutex;</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  _S_single;</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> </div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="comment">// NB: As this is used in libsupc++, need to only depend on</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="comment">// exception. No stdexception classes, no use of std::string.</span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keyword">class </span>__concurrence_lock_error : <span class="keyword">public</span> <a class="code" href="a05424.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>  what() <span class="keyword">const</span> throw()</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  { <span class="keywordflow">return</span> <span class="stringliteral">"__gnu_cxx::__concurrence_lock_error"</span>; }</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  };</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keyword">class </span>__concurrence_unlock_error : <span class="keyword">public</span> <a class="code" href="a05424.html">std::exception</a></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  {</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keyword">virtual</span> <span class="keywordtype">char</span> <span class="keyword">const</span>*</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  what() <span class="keyword">const</span> throw()</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  { <span class="keywordflow">return</span> <span class="stringliteral">"__gnu_cxx::__concurrence_unlock_error"</span>; }</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  };</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> </div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keyword">class </span>__concurrence_broadcast_error : <span class="keyword">public</span> <a class="code" href="a05424.html">std::exception</a></div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  {</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keyword">virtual</span> <span class="keywordtype">char</span> <span class="keyword">const</span>*</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  what() <span class="keyword">const</span> throw()</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  { <span class="keywordflow">return</span> <span class="stringliteral">"__gnu_cxx::__concurrence_broadcast_error"</span>; }</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  };</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">class </span>__concurrence_wait_error : <span class="keyword">public</span> <a class="code" href="a05424.html">std::exception</a></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  {</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keyword">virtual</span> <span class="keywordtype">char</span> <span class="keyword">const</span>*</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  what() <span class="keyword">const</span> throw()</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  { <span class="keywordflow">return</span> <span class="stringliteral">"__gnu_cxx::__concurrence_wait_error"</span>; }</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  };</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> </div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="comment">// Substitute for concurrence_error object in the case of -fno-exceptions.</span></div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  __throw_concurrence_lock_error()</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  { _GLIBCXX_THROW_OR_ABORT(__concurrence_lock_error()); }</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> </div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  __throw_concurrence_unlock_error()</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  { _GLIBCXX_THROW_OR_ABORT(__concurrence_unlock_error()); }</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span> </div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="preprocessor">#ifdef __GTHREAD_HAS_COND</span></div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  __throw_concurrence_broadcast_error()</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  { _GLIBCXX_THROW_OR_ABORT(__concurrence_broadcast_error()); }</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span> </div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  __throw_concurrence_wait_error()</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  { _GLIBCXX_THROW_OR_ABORT(__concurrence_wait_error()); }</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  </div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keyword">class </span>__mutex </div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  {</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="preprocessor">#if __GTHREADS && defined __GTHREAD_MUTEX_INIT</span></div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  __gthread_mutex_t _M_mutex = __GTHREAD_MUTEX_INIT;</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  __gthread_mutex_t _M_mutex;</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> </div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  __mutex(<span class="keyword">const</span> __mutex&);</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  __mutex& operator=(<span class="keyword">const</span> __mutex&);</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span> </div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  __mutex() </div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  { </div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="preprocessor">#if __GTHREADS && ! defined __GTHREAD_MUTEX_INIT</span></div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keywordflow">if</span> (__gthread_active_p())</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  __GTHREAD_MUTEX_INIT_FUNCTION(&_M_mutex);</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  }</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="preprocessor">#if __GTHREADS && ! defined __GTHREAD_MUTEX_INIT</span></div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  ~__mutex() </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="keywordflow">if</span> (__gthread_active_p())</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  __gthread_mutex_destroy(&_M_mutex); </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="preprocessor">#endif </span></div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span> </div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keywordtype">void</span> <a class="code" href="a01538.html#a82fa606b1427f731ac64bb8ac49221f3">lock</a>()</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> <span class="preprocessor">#if __GTHREADS</span></div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordflow">if</span> (__gthread_active_p())</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  {</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="keywordflow">if</span> (__gthread_mutex_lock(&_M_mutex) != 0)</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  __throw_concurrence_lock_error();</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  }</div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  }</div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  </div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keywordtype">void</span> unlock()</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> <span class="preprocessor">#if __GTHREADS</span></div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keywordflow">if</span> (__gthread_active_p())</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  {</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keywordflow">if</span> (__gthread_mutex_unlock(&_M_mutex) != 0)</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  __throw_concurrence_unlock_error();</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> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  }</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>  __gthread_mutex_t* gthread_mutex(<span class="keywordtype">void</span>)</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  { <span class="keywordflow">return</span> &_M_mutex; }</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> </div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keyword">class </span>__recursive_mutex </div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  {</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="preprocessor">#if __GTHREADS && defined __GTHREAD_RECURSIVE_MUTEX_INIT</span></div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  __gthread_recursive_mutex_t _M_mutex = __GTHREAD_RECURSIVE_MUTEX_INIT;</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  __gthread_recursive_mutex_t _M_mutex;</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span> </div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  __recursive_mutex(<span class="keyword">const</span> __recursive_mutex&);</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  __recursive_mutex& operator=(<span class="keyword">const</span> __recursive_mutex&);</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span> </div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  __recursive_mutex() </div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  { </div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span> <span class="preprocessor">#if __GTHREADS && ! defined __GTHREAD_RECURSIVE_MUTEX_INIT</span></div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keywordflow">if</span> (__gthread_active_p())</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION(&_M_mutex);</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span> <span class="preprocessor">#endif</span></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> <span class="preprocessor">#if __GTHREADS && ! defined __GTHREAD_RECURSIVE_MUTEX_INIT</span></div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  ~__recursive_mutex()</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  {</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="keywordflow">if</span> (__gthread_active_p())</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  __gthread_recursive_mutex_destroy(&_M_mutex);</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  }</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="preprocessor">#endif</span></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>  <span class="keywordtype">void</span> <a class="code" href="a01538.html#a82fa606b1427f731ac64bb8ac49221f3">lock</a>()</div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  { </div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span> <span class="preprocessor">#if __GTHREADS</span></div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="keywordflow">if</span> (__gthread_active_p())</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>  <span class="keywordflow">if</span> (__gthread_recursive_mutex_lock(&_M_mutex) != 0)</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  __throw_concurrence_lock_error();</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> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  }</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  </div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keywordtype">void</span> unlock()</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  { </div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span> <span class="preprocessor">#if __GTHREADS</span></div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="keywordflow">if</span> (__gthread_active_p())</div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  {</div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="keywordflow">if</span> (__gthread_recursive_mutex_unlock(&_M_mutex) != 0)</div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  __throw_concurrence_unlock_error();</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="preprocessor">#endif</span></div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  }</div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span> </div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  __gthread_recursive_mutex_t* gthread_recursive_mutex(<span class="keywordtype">void</span>)</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  { <span class="keywordflow">return</span> &_M_mutex; }</div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  };</div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span> <span class="comment"></span></div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span> <span class="comment"> /// Scoped lock idiom.</span></div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span> <span class="comment"></span> <span class="comment">// Acquire the mutex here with a constructor call, then release with</span></div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="comment">// the destructor call in accordance with RAII style.</span></div><div class="line"><a name="l00231"></a><span class="lineno"><a class="line" href="a10280.html"> 231</a></span>  <span class="keyword">class </span><a class="code" href="a10280.html">__scoped_lock</a></div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  {</div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="keyword">typedef</span> __mutex __mutex_type;</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span> </div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  __mutex_type& _M_device;</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>  <a class="code" href="a10280.html">__scoped_lock</a>(<span class="keyword">const</span> <a class="code" href="a10280.html">__scoped_lock</a>&);</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <a class="code" href="a10280.html">__scoped_lock</a>& operator=(<span class="keyword">const</span> <a class="code" href="a10280.html">__scoped_lock</a>&);</div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span> </div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="keyword">explicit</span> <a class="code" href="a10280.html">__scoped_lock</a>(__mutex_type& __name) : _M_device(__name)</div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  { _M_device.lock(); }</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span> </div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  ~<a class="code" href="a10280.html">__scoped_lock</a>() <span class="keywordflow">throw</span>()</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  { _M_device.unlock(); }</div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  };</div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span> </div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span> <span class="preprocessor">#ifdef __GTHREAD_HAS_COND</span></div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <span class="keyword">class </span>__cond</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">private</span>:</div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span> <span class="preprocessor">#if __GTHREADS && defined __GTHREAD_COND_INIT</span></div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  __gthread_cond_t _M_cond = __GTHREAD_COND_INIT;</div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  __gthread_cond_t _M_cond;</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span> </div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  __cond(<span class="keyword">const</span> __cond&);</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  __cond& operator=(<span class="keyword">const</span> __cond&);</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>  <span class="keyword">public</span>:</div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  __cond() </div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  { </div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span> <span class="preprocessor">#if __GTHREADS && ! defined __GTHREAD_COND_INIT</span></div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <span class="keywordflow">if</span> (__gthread_active_p())</div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  __GTHREAD_COND_INIT_FUNCTION(&_M_cond);</div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  }</div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span> </div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span> <span class="preprocessor">#if __GTHREADS && ! defined __GTHREAD_COND_INIT</span></div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  ~__cond() </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">if</span> (__gthread_active_p())</div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  __gthread_cond_destroy(&_M_cond); </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="preprocessor">#endif </span></div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span> </div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <span class="keywordtype">void</span> broadcast()</div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  {</div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span> <span class="preprocessor">#if __GTHREADS</span></div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  <span class="keywordflow">if</span> (__gthread_active_p())</div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  {</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  <span class="keywordflow">if</span> (__gthread_cond_broadcast(&_M_cond) != 0)</div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  __throw_concurrence_broadcast_error();</div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  }</div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  }</div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span> </div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  <span class="keywordtype">void</span> wait(__mutex *mutex)</div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  {</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span> <span class="preprocessor">#if __GTHREADS</span></div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  {</div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  <span class="keywordflow">if</span> (__gthread_cond_wait(&_M_cond, mutex->gthread_mutex()) != 0)</div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  __throw_concurrence_wait_error();</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="preprocessor">#endif</span></div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  }</div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span> </div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  <span class="keywordtype">void</span> wait_recursive(__recursive_mutex *mutex)</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="preprocessor">#if __GTHREADS</span></div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  {</div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="keywordflow">if</span> (__gthread_cond_wait_recursive(&_M_cond,</div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  mutex->gthread_recursive_mutex())</div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  != 0)</div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  __throw_concurrence_wait_error();</div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  }</div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  }</div><div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  };</div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span> <span class="preprocessor">#endif</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> _GLIBCXX_END_NAMESPACE_VERSION</div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span> } <span class="comment">// namespace</span></div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span> </div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span> <span class="preprocessor">#endif</span></div><div class="ttc" id="a01538_html_a82fa606b1427f731ac64bb8ac49221f3"><div class="ttname"><a href="a01538.html#a82fa606b1427f731ac64bb8ac49221f3">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="a00110_source.html#l00542">mutex:542</a></div></div> <div class="ttc" id="a00356_html"><div class="ttname"><a href="a00356.html">functexcept.h</a></div></div> <div class="ttc" id="a01544_html"><div class="ttname"><a href="a01544.html">__gnu_cxx</a></div><div class="ttdoc">GNU extensions for public use.</div></div> <div class="ttc" id="a01088_html"><div class="ttname"><a href="a01088.html">type_traits.h</a></div></div> <div class="ttc" id="a00026_html"><div class="ttname"><a href="a00026.html">exception</a></div></div> <div class="ttc" id="a10280_html"><div class="ttname"><a href="a10280.html">__gnu_cxx::__scoped_lock</a></div><div class="ttdoc">Scoped lock idiom.</div><div class="ttdef"><b>Definition:</b> <a href="a01034_source.html#l00231">concurrence.h:231</a></div></div> <div class="ttc" id="a00311_html"><div class="ttname"><a href="a00311.html">cpp_type_traits.h</a></div></div> <div class="ttc" id="a05424_html"><div class="ttname"><a href="a05424.html">std::exception</a></div><div class="ttdoc">Base class for all library exceptions.</div><div class="ttdef"><b>Definition:</b> <a href="a00326_source.html#l00060">exception.h:60</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_d6815ee4ad7be618f033845800be3017.html">ext</a></li><li class="navelem"><a class="el" href="a01034.html">concurrence.h</a></li> <li class="footer">Generated by <a href="http://www.doxygen.org/index.html"> <img class="footer" 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