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>DB_ENV->get_lk_max_locks()</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="lock.html" title="Chapter��6.�� The DB_LOCK Handle" /> 11 <link rel="prev" href="envget_lk_max_lockers.html" title="DB_ENV->get_lk_max_lockers()" /> 12 <link rel="next" href="envget_lk_max_objects.html" title="DB_ENV->get_lk_max_objects()" /> 13 </head> 14 <body> 15 <div class="navheader"> 16 <table width="100%" summary="Navigation header"> 17 <tr> 18 <th colspan="3" align="center">DB_ENV->get_lk_max_locks()</th> 19 </tr> 20 <tr> 21 <td width="20%" align="left"><a accesskey="p" href="envget_lk_max_lockers.html">Prev</a>��</td> 22 <th width="60%" align="center">Chapter��6.�� 23 The DB_LOCK Handle 24 </th> 25 <td width="20%" align="right">��<a accesskey="n" href="envget_lk_max_objects.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="envget_lk_max_locks"></a>DB_ENV->get_lk_max_locks()</h2> 35 </div> 36 </div> 37 </div> 38 <pre class="programlisting">#include <db.h> 39 40int 41DB_ENV->get_lk_max_locks(DB_ENV *dbenv, u_int32_t *lk_maxp); </pre> 42 <p> 43 The <code class="methodname">DB_ENV->get_lk_max_locks()</code> method returns the maximum number of 44 potential locks. You can configure this using the 45 <a class="xref" href="envset_lk_max_locks.html" title="DB_ENV->set_lk_max_locks()">DB_ENV->set_lk_max_locks()</a> 46 method. 47 </p> 48 <p> 49 The <code class="methodname">DB_ENV->get_lk_max_locks()</code> method may be called at any time 50 during the life of the application. 51 </p> 52 <p> 53 The <code class="methodname">DB_ENV->get_lk_max_locks()</code> <span> 54 <span> 55 method returns a non-zero error value on failure and 0 on success. 56 </span> 57 58 </span> 59 </p> 60 <div class="sect2" lang="en" xml:lang="en"> 61 <div class="titlepage"> 62 <div> 63 <div> 64 <h3 class="title"><a id="id1674644"></a>Parameters</h3> 65 </div> 66 </div> 67 </div> 68 <div class="sect3" lang="en" xml:lang="en"> 69 <div class="titlepage"> 70 <div> 71 <div> 72 <h4 class="title"><a id="id1674645"></a>lk_maxp</h4> 73 </div> 74 </div> 75 </div> 76 <p> 77 The <code class="methodname">DB_ENV->get_lk_max_locks()</code> method returns the maximum number of 78 locks in <span class="bold"><strong>lk_maxp</strong></span>. 79 </p> 80 </div> 81 </div> 82 <div class="sect2" lang="en" xml:lang="en"> 83 <div class="titlepage"> 84 <div> 85 <div> 86 <h3 class="title"><a id="id1674302"></a>Errors</h3> 87 </div> 88 </div> 89 </div> 90 <p> 91 The <code class="methodname">DB_ENV->get_lk_max_locks()</code> <span> 92 <span> 93 method may fail and return one of the following non-zero errors: 94 </span> 95 96 </span> 97 </p> 98 <div class="sect3" lang="en" xml:lang="en"> 99 <div class="titlepage"> 100 <div> 101 <div> 102 <h4 class="title"><a id="id1674737"></a>EINVAL</h4> 103 </div> 104 </div> 105 </div> 106 <p> 107 The method was called on an environment which had been 108 opened without being configured for locking. 109 </p> 110 </div> 111 </div> 112 <div class="sect2" lang="en" xml:lang="en"> 113 <div class="titlepage"> 114 <div> 115 <div> 116 <h3 class="title"><a id="id1674874"></a>Class</h3> 117 </div> 118 </div> 119 </div> 120 <p> 121 <a class="link" href="env.html" title="Chapter��5.�� The DB_ENV Handle">DB_ENV</a>, <a class="link" href="lock.html" title="Chapter��6.�� The DB_LOCK Handle">DB_LOCK</a> 122 </p> 123 </div> 124 <div class="sect2" lang="en" xml:lang="en"> 125 <div class="titlepage"> 126 <div> 127 <div> 128 <h3 class="title"><a id="id1674698"></a>See Also</h3> 129 </div> 130 </div> 131 </div> 132 <p> 133 <a class="xref" href="lock.html#locklist" title="Locking Subsystem and Related Methods">Locking Subsystem and Related Methods</a>, 134 <a class="xref" href="envset_lk_max_locks.html" title="DB_ENV->set_lk_max_locks()">DB_ENV->set_lk_max_locks()</a> 135 </p> 136 </div> 137 </div> 138 <div class="navfooter"> 139 <hr /> 140 <table width="100%" summary="Navigation footer"> 141 <tr> 142 <td width="40%" align="left"><a accesskey="p" href="envget_lk_max_lockers.html">Prev</a>��</td> 143 <td width="20%" align="center"> 144 <a accesskey="u" href="lock.html">Up</a> 145 </td> 146 <td width="40%" align="right">��<a accesskey="n" href="envget_lk_max_objects.html">Next</a></td> 147 </tr> 148 <tr> 149 <td width="40%" align="left" valign="top">DB_ENV->get_lk_max_lockers()��</td> 150 <td width="20%" align="center"> 151 <a accesskey="h" href="index.html">Home</a> 152 </td> 153 <td width="40%" align="right" valign="top">��DB_ENV->get_lk_max_objects()</td> 154 </tr> 155 </table> 156 </div> 157 </body> 158</html> 159