<!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++: std::once_flag Struct Reference</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('a00862.html','');}); </script> <div id="doc-content"> <div class="header"> <div class="summary"> <a href="#pub-methods">Public Member Functions</a> | <a href="#friends">Friends</a> | <a href="a03157.html">List of all members</a> </div> <div class="headertitle"> <div class="title">std::once_flag Struct Reference<div class="ingroups"><a class="el" href="a01638.html">Mutexes</a></div></div> </div> </div><!--header--> <div class="contents"> <table class="memberdecls"> <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a> Public Member Functions</h2></td></tr> <tr class="memitem:a78b964b5391b5aa7da309eb3d8b88178"><td class="memItemLeft" align="right" valign="top">constexpr </td><td class="memItemRight" valign="bottom"><a class="el" href="a00862.html#a78b964b5391b5aa7da309eb3d8b88178">once_flag</a> () noexcept=default</td></tr> <tr class="separator:a78b964b5391b5aa7da309eb3d8b88178"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a60da2be389d0324a5210bd778a522af8"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00862.html#a60da2be389d0324a5210bd778a522af8">once_flag</a> (const <a class="el" href="a00862.html">once_flag</a> &)=delete</td></tr> <tr class="separator:a60da2be389d0324a5210bd778a522af8"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:adbefc6681906783e9e20249895a98082"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00862.html">once_flag</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="a00862.html#adbefc6681906783e9e20249895a98082">operator=</a> (const <a class="el" href="a00862.html">once_flag</a> &)=delete</td></tr> <tr class="separator:adbefc6681906783e9e20249895a98082"><td class="memSeparator" colspan="2"> </td></tr> </table><table class="memberdecls"> <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="friends"></a> Friends</h2></td></tr> <tr class="memitem:a413ad4ec8c9116bffdd976beed6fc029"><td class="memTemplParams" colspan="2">template<typename _Callable , typename... _Args> </td></tr> <tr class="memitem:a413ad4ec8c9116bffdd976beed6fc029"><td class="memTemplItemLeft" align="right" valign="top">void </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00862.html#a413ad4ec8c9116bffdd976beed6fc029">call_once</a> (<a class="el" href="a00862.html">once_flag</a> &__once, _Callable &&__f, _Args &&...__args)</td></tr> <tr class="separator:a413ad4ec8c9116bffdd976beed6fc029"><td class="memSeparator" colspan="2"> </td></tr> </table> <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2> <div class="textblock"><p><a class="el" href="a00862.html" title="once_flag">once_flag</a> </p> <p>Definition at line <a class="el" href="a01321_source.html#l00759">759</a> of file <a class="el" href="a01321_source.html">mutex</a>.</p> </div><h2 class="groupheader">Constructor & Destructor Documentation</h2> <a class="anchor" id="a78b964b5391b5aa7da309eb3d8b88178"></a> <div class="memitem"> <div class="memproto"> <table class="mlabels"> <tr> <td class="mlabels-left"> <table class="memname"> <tr> <td class="memname">constexpr std::once_flag::once_flag </td> <td>(</td> <td class="paramname"></td><td>)</td> <td></td> </tr> </table> </td> <td class="mlabels-right"> <span class="mlabels"><span class="mlabel">default</span><span class="mlabel">noexcept</span></span> </td> </tr> </table> </div><div class="memdoc"> <p>Constructor. </p> </div> </div> <a class="anchor" id="a60da2be389d0324a5210bd778a522af8"></a> <div class="memitem"> <div class="memproto"> <table class="mlabels"> <tr> <td class="mlabels-left"> <table class="memname"> <tr> <td class="memname">std::once_flag::once_flag </td> <td>(</td> <td class="paramtype">const <a class="el" href="a00862.html">once_flag</a> & </td> <td class="paramname"></td><td>)</td> <td></td> </tr> </table> </td> <td class="mlabels-right"> <span class="mlabels"><span class="mlabel">delete</span></span> </td> </tr> </table> </div><div class="memdoc"> <p>Deleted copy constructor. </p> </div> </div> <h2 class="groupheader">Member Function Documentation</h2> <a class="anchor" id="adbefc6681906783e9e20249895a98082"></a> <div class="memitem"> <div class="memproto"> <table class="mlabels"> <tr> <td class="mlabels-left"> <table class="memname"> <tr> <td class="memname"><a class="el" href="a00862.html">once_flag</a>& std::once_flag::operator= </td> <td>(</td> <td class="paramtype">const <a class="el" href="a00862.html">once_flag</a> & </td> <td class="paramname"></td><td>)</td> <td></td> </tr> </table> </td> <td class="mlabels-right"> <span class="mlabels"><span class="mlabel">delete</span></span> </td> </tr> </table> </div><div class="memdoc"> <p>Deleted assignment operator. </p> </div> </div> <h2 class="groupheader">Friends And Related Function Documentation</h2> <a class="anchor" id="a413ad4ec8c9116bffdd976beed6fc029"></a> <div class="memitem"> <div class="memproto"> <div class="memtemplate"> template<typename _Callable , typename... _Args> </div> <table class="mlabels"> <tr> <td class="mlabels-left"> <table class="memname"> <tr> <td class="memname">void call_once </td> <td>(</td> <td class="paramtype"><a class="el" href="a00862.html">once_flag</a> & </td> <td class="paramname"><em>__once</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">_Callable && </td> <td class="paramname"><em>__f</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">_Args &&... </td> <td class="paramname"><em>__args</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </td> <td class="mlabels-right"> <span class="mlabels"><span class="mlabel">friend</span></span> </td> </tr> </table> </div><div class="memdoc"> <p>call_once </p> <p>Definition at line <a class="el" href="a01321_source.html#l00804">804</a> of file <a class="el" href="a01321_source.html">mutex</a>.</p> </div> </div> <hr/>The documentation for this struct was generated from the following file:<ul> <li><a class="el" href="a01321_source.html">mutex</a></li> </ul> </div><!-- contents --> </div><!-- doc-content --> <!-- start footer part --> <div id="nav-path" class="navpath"><!-- id is needed for treeview function! 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