1<?xml version="1.0" encoding="UTF-8" standalone="no"?> 2<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 3<html xmlns="http://www.w3.org/1999/xhtml"> 4 <head> 5 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> 6 <title>DbEnv::mutex_unlock()</title> 7 <link rel="stylesheet" href="apiReference.css" type="text/css" /> 8 <meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /> 9 <link rel="start" href="index.html" title="Berkeley DB C++ API Reference" /> 10 <link rel="up" href="mutex.html" title="Chapter 10. Mutex Methods" /> 11 <link rel="prev" href="mutexstat_print.html" title="DbEnv::mutex_stat_print()" /> 12 <link rel="next" href="rep.html" title="Chapter 11. Replication Methods" /> 13 </head> 14 <body> 15 <div class="navheader"> 16 <table width="100%" summary="Navigation header"> 17 <tr> 18 <th colspan="3" align="center">DbEnv::mutex_unlock()</th> 19 </tr> 20 <tr> 21 <td width="20%" align="left"><a accesskey="p" href="mutexstat_print.html">Prev</a> </td> 22 <th width="60%" align="center">Chapter 10. 23 Mutex Methods 24 </th> 25 <td width="20%" align="right"> <a accesskey="n" href="rep.html">Next</a></td> 26 </tr> 27 </table> 28 <hr /> 29 </div> 30 <div class="sect1" lang="en" xml:lang="en"> 31 <div class="titlepage"> 32 <div> 33 <div> 34 <h2 class="title" style="clear: both"><a id="mutexunlock"></a>DbEnv::mutex_unlock()</h2> 35 </div> 36 </div> 37 </div> 38 <pre class="programlisting">#include <db_cxx.h> 39 40int 41DbEnv::mutex_unlock(db_mutex_t mutex);</pre> 42 <p> 43 The <code class="methodname">DbEnv::mutex_unlock()</code> method unlocks the mutex locked by 44 <a class="xref" href="mutexlock.html" title="DbEnv::mutex_lock()">DbEnv::mutex_lock()</a>. 45 </p> 46 <p> 47 The <code class="methodname">DbEnv::mutex_unlock()</code> <span> 48 49 <span> 50 method either returns a non-zero error value or throws an 51 exception that encapsulates a non-zero error value on 52 failure, and returns 0 on success. 53 </span> 54 </span> 55 </p> 56 <div class="sect2" lang="en" xml:lang="en"> 57 <div class="titlepage"> 58 <div> 59 <div> 60 <h3 class="title"><a id="id1700302"></a>Parameters</h3> 61 </div> 62 </div> 63 </div> 64 <div class="sect3" lang="en" xml:lang="en"> 65 <div class="titlepage"> 66 <div> 67 <div> 68 <h4 class="title"><a id="id1700356"></a>mutex</h4> 69 </div> 70 </div> 71 </div> 72 <p> 73 The <span class="bold"><strong>mutex</strong></span> parameter is a mutex 74 previously locked by <a class="xref" href="mutexlock.html" title="DbEnv::mutex_lock()">DbEnv::mutex_lock()</a>. 75 </p> 76 </div> 77 </div> 78 <div class="sect2" lang="en" xml:lang="en"> 79 <div class="titlepage"> 80 <div> 81 <div> 82 <h3 class="title"><a id="id1700431"></a>Errors</h3> 83 </div> 84 </div> 85 </div> 86 <p> 87 The <code class="methodname">DbEnv::mutex_unlock()</code> <span> 88 89 <span> 90 method may fail and throw a <a class="link" href="dbexception.html" title="Chapter 6. The DbException Class">DbException</a> 91 exception, encapsulating one of the following non-zero errors, or return one 92 of the following non-zero errors: 93 </span> 94 </span> 95 </p> 96 <div class="sect3" lang="en" xml:lang="en"> 97 <div class="titlepage"> 98 <div> 99 <div> 100 <h4 class="title"><a id="id1700348"></a>EINVAL</h4> 101 </div> 102 </div> 103 </div> 104 <p> 105 An invalid flag value or parameter was specified. 106 </p> 107 </div> 108 </div> 109 <div class="sect2" lang="en" xml:lang="en"> 110 <div class="titlepage"> 111 <div> 112 <div> 113 <h3 class="title"><a id="id1700158"></a>Class</h3> 114 </div> 115 </div> 116 </div> 117 <p> 118 <a class="link" href="env.html" title="Chapter 5. The DbEnv Handle">DbEnv</a> 119 </p> 120 </div> 121 <div class="sect2" lang="en" xml:lang="en"> 122 <div class="titlepage"> 123 <div> 124 <div> 125 <h3 class="title"><a id="id1700354"></a>See Also</h3> 126 </div> 127 </div> 128 </div> 129 <p> 130 <a class="xref" href="mutex.html#mutexlist" title="Mutex Methods">Mutex Methods</a> 131 </p> 132 </div> 133 </div> 134 <div class="navfooter"> 135 <hr /> 136 <table width="100%" summary="Navigation footer"> 137 <tr> 138 <td width="40%" align="left"><a accesskey="p" href="mutexstat_print.html">Prev</a> </td> 139 <td width="20%" align="center"> 140 <a accesskey="u" href="mutex.html">Up</a> 141 </td> 142 <td width="40%" align="right"> <a accesskey="n" href="rep.html">Next</a></td> 143 </tr> 144 <tr> 145 <td width="40%" align="left" valign="top">DbEnv::mutex_stat_print() </td> 146 <td width="20%" align="center"> 147 <a accesskey="h" href="index.html">Home</a> 148 </td> 149 <td width="40%" align="right" valign="top"> Chapter 11. 150 Replication Methods 151 </td> 152 </tr> 153 </table> 154 </div> 155 </body> 156</html> 157