<!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 1.8.3"/> <title>libstdc++: gthr.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="navtree.js"></script> <script type="text/javascript"> $(document).ready(initResizable); $(window).load(resizeHeight); </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 style="padding-left: 0.5em;"> <div id="projectname">libstdc++ </div> </td> </tr> </tbody> </table> </div> <!-- end header part --> <!-- Generated by Doxygen 1.8.3 --> </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('a01213_source.html','');}); </script> <div id="doc-content"> <div class="header"> <div class="headertitle"> <div class="title">gthr.h</div> </div> </div><!--header--> <div class="contents"> <div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/* Threads compatibility routines for libgcc2. */</span></div> <div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">/* Compile this one with gcc. */</span></div> <div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">/* Copyright (C) 1997, 1998, 2004, 2008, 2009, 2011</span></div> <div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> Free Software Foundation, Inc.</span></div> <div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"></span></div> <div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">This file is part of GCC.</span></div> <div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"></span></div> <div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">GCC is free software; you can redistribute it and/or modify it under</span></div> <div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">the terms of the GNU General Public License as published by the Free</span></div> <div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">Software Foundation; either version 3, or (at your option) any later</span></div> <div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">version.</span></div> <div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"></span></div> <div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">GCC is distributed in the hope that it will be useful, but WITHOUT ANY</span></div> <div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment">WARRANTY; without even the implied warranty of MERCHANTABILITY or</span></div> <div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment">FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License</span></div> <div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">for more details.</span></div> <div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"></span></div> <div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">Under Section 7 of GPL version 3, you are granted additional</span></div> <div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment">permissions described in the GCC Runtime Library Exception, version</span></div> <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">3.1, as published by the Free Software Foundation.</span></div> <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"></span></div> <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">You should have received a copy of the GNU General Public License and</span></div> <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">a copy of the GCC Runtime Library Exception along with this program;</span></div> <div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment">see the files COPYING3 and COPYING.RUNTIME respectively. If not, see</span></div> <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"><http://www.gnu.org/licenses/>. */</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="preprocessor">#ifndef _GLIBCXX_GCC_GTHR_H</span></div> <div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor"></span><span class="preprocessor">#define _GLIBCXX_GCC_GTHR_H</span></div> <div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor"></span></div> <div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#ifndef _GLIBCXX_HIDE_EXPORTS</span></div> <div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor"></span><span class="preprocessor">#pragma GCC visibility push(default)</span></div> <div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div> <div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor"></span></div> <div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment">/* If this file is compiled with threads support, it must</span></div> <div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> #define __GTHREADS 1</span></div> <div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"> to indicate that threads support is present. Also it has define</span></div> <div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"> function</span></div> <div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"> int __gthread_active_p ()</span></div> <div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"> that returns 1 if thread system is active, 0 if not.</span></div> <div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"></span></div> <div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> The threads interface must define the following types:</span></div> <div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> __gthread_key_t</span></div> <div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> __gthread_once_t</span></div> <div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> __gthread_mutex_t</span></div> <div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"> __gthread_recursive_mutex_t</span></div> <div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"></span></div> <div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> The threads interface must define the following macros:</span></div> <div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"></span></div> <div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"> __GTHREAD_ONCE_INIT</span></div> <div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"> to initialize __gthread_once_t</span></div> <div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"> __GTHREAD_MUTEX_INIT</span></div> <div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> to initialize __gthread_mutex_t to get a fast</span></div> <div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> non-recursive mutex.</span></div> <div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> __GTHREAD_MUTEX_INIT_FUNCTION</span></div> <div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"> some systems can't initialize a mutex without a</span></div> <div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"> function call. On such systems, define this to a</span></div> <div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> function which looks like this:</span></div> <div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> void __GTHREAD_MUTEX_INIT_FUNCTION (__gthread_mutex_t *)</span></div> <div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> Don't define __GTHREAD_MUTEX_INIT in this case</span></div> <div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"> __GTHREAD_RECURSIVE_MUTEX_INIT</span></div> <div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION</span></div> <div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> as above, but for a recursive mutex.</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"> The threads interface must define the following static functions:</span></div> <div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"></span></div> <div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment"> int __gthread_once (__gthread_once_t *once, void (*func) ())</span></div> <div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment"></span></div> <div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"> int __gthread_key_create (__gthread_key_t *keyp, void (*dtor) (void *))</span></div> <div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"> int __gthread_key_delete (__gthread_key_t key)</span></div> <div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment"></span></div> <div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment"> void *__gthread_getspecific (__gthread_key_t key)</span></div> <div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment"> int __gthread_setspecific (__gthread_key_t key, const void *ptr)</span></div> <div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment"></span></div> <div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment"> int __gthread_mutex_destroy (__gthread_mutex_t *mutex);</span></div> <div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment"></span></div> <div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment"> int __gthread_mutex_lock (__gthread_mutex_t *mutex);</span></div> <div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment"> int __gthread_mutex_trylock (__gthread_mutex_t *mutex);</span></div> <div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment"> int __gthread_mutex_unlock (__gthread_mutex_t *mutex);</span></div> <div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment"></span></div> <div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="comment"> int __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex);</span></div> <div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="comment"> int __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex);</span></div> <div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="comment"> int __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex);</span></div> <div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment"></span></div> <div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment"> The following are supported in POSIX threads only. They are required to</span></div> <div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment"> fix a deadlock in static initialization inside libsupc++. The header file</span></div> <div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="comment"> gthr-posix.h defines a symbol __GTHREAD_HAS_COND to signify that these extra</span></div> <div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="comment"> features are supported.</span></div> <div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="comment"></span></div> <div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="comment"> Types:</span></div> <div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="comment"> __gthread_cond_t</span></div> <div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment"></span></div> <div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment"> Macros:</span></div> <div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment"> __GTHREAD_COND_INIT</span></div> <div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="comment"> __GTHREAD_COND_INIT_FUNCTION</span></div> <div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="comment"></span></div> <div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="comment"> Interface:</span></div> <div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="comment"> int __gthread_cond_broadcast (__gthread_cond_t *cond);</span></div> <div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment"> int __gthread_cond_wait (__gthread_cond_t *cond, __gthread_mutex_t *mutex);</span></div> <div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment"> int __gthread_cond_wait_recursive (__gthread_cond_t *cond,</span></div> <div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment"> __gthread_recursive_mutex_t *mutex);</span></div> <div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment"></span></div> <div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment"> All functions returning int should return zero on success or the error</span></div> <div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="comment"> number. If the operation is not supported, -1 is returned.</span></div> <div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="comment"></span></div> <div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="comment"> If the following are also defined, you should</span></div> <div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="comment"> #define __GTHREADS_CXX0X 1</span></div> <div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="comment"> to enable the c++0x thread library.</span></div> <div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="comment"></span></div> <div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="comment"> Types:</span></div> <div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="comment"> __gthread_t</span></div> <div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="comment"> __gthread_time_t</span></div> <div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="comment"></span></div> <div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="comment"> Interface:</span></div> <div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment"> int __gthread_create (__gthread_t *thread, void *(*func) (void*),</span></div> <div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="comment"> void *args);</span></div> <div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="comment"> int __gthread_join (__gthread_t thread, void **value_ptr);</span></div> <div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="comment"> int __gthread_detach (__gthread_t thread);</span></div> <div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="comment"> int __gthread_equal (__gthread_t t1, __gthread_t t2);</span></div> <div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="comment"> __gthread_t __gthread_self (void);</span></div> <div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="comment"> int __gthread_yield (void);</span></div> <div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="comment"></span></div> <div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="comment"> int __gthread_mutex_timedlock (__gthread_mutex_t *m,</span></div> <div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="comment"> const __gthread_time_t *abs_timeout);</span></div> <div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="comment"> int __gthread_recursive_mutex_timedlock (__gthread_recursive_mutex_t *m,</span></div> <div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="comment"> const __gthread_time_t *abs_time);</span></div> <div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="comment"></span></div> <div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="comment"> int __gthread_cond_signal (__gthread_cond_t *cond);</span></div> <div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="comment"> int __gthread_cond_timedwait (__gthread_cond_t *cond,</span></div> <div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="comment"> __gthread_mutex_t *mutex,</span></div> <div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="comment"> const __gthread_time_t *abs_timeout);</span></div> <div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="comment"> int __gthread_cond_timedwait_recursive (__gthread_cond_t *cond,</span></div> <div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="comment"> __gthread_recursive_mutex_t *mutex,</span></div> <div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="comment"> const __gthread_time_t *abs_time)</span></div> <div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="comment"></span></div> <div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="comment">*/</span></div> <div class="line"><a name="l00136"></a><span class="lineno"> 136</span> </div> <div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="preprocessor">#if __GXX_WEAK__</span></div> <div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <span class="preprocessor"></span><span class="comment">/* The pe-coff weak support isn't fully compatible to ELF's weak.</span></div> <div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="comment"> For static libraries it might would work, but as we need to deal</span></div> <div class="line"><a name="l00140"></a><span class="lineno"> 140</span> <span class="comment"> with shared versions too, we disable it for mingw-targets. */</span></div> <div class="line"><a name="l00141"></a><span class="lineno"> 141</span> <span class="preprocessor">#ifdef _GLIBCXX___MINGW32_GLIBCXX___</span></div> <div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="preprocessor"></span><span class="preprocessor">#undef _GLIBCXX_GTHREAD_USE_WEAK</span></div> <div class="line"><a name="l00143"></a><span class="lineno"> 143</span> <span class="preprocessor"></span><span class="preprocessor">#define _GLIBCXX_GTHREAD_USE_WEAK 0</span></div> <div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div> <div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="preprocessor"></span></div> <div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="preprocessor">#ifndef _GLIBCXX_GTHREAD_USE_WEAK</span></div> <div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="preprocessor"></span><span class="preprocessor">#define _GLIBCXX_GTHREAD_USE_WEAK 1</span></div> <div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div> <div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div> <div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="preprocessor"></span><span class="preprocessor">#include <bits/gthr-default.h></span></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="preprocessor">#ifndef _GLIBCXX_HIDE_EXPORTS</span></div> <div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <span class="preprocessor"></span><span class="preprocessor">#pragma GCC visibility pop</span></div> <div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div> <div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <span class="preprocessor"></span></div> <div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="preprocessor">#endif </span><span class="comment">/* ! _GLIBCXX_GCC_GTHR_H */</span><span class="preprocessor"></span></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" 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