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->mutex_get_tas_spins()</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 9. Mutex Methods" /> 11 <link rel="prev" href="mutexget_max.html" title="DB_ENV->mutex_get_max()" /> 12 <link rel="next" href="mutexlock.html" title="DB_ENV->mutex_lock()" /> 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->mutex_get_tas_spins()</th> 19 </tr> 20 <tr> 21 <td width="20%" align="left"><a accesskey="p" href="mutexget_max.html">Prev</a> </td> 22 <th width="60%" align="center">Chapter 9. 23 Mutex Methods 24 </th> 25 <td width="20%" align="right"> <a accesskey="n" href="mutexlock.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="mutexget_tas_spins"></a>DB_ENV->mutex_get_tas_spins()</h2> 35 </div> 36 </div> 37 </div> 38 <pre class="programlisting">#include <db.h> 39 40int 41DB_ENV->mutex_get_tas_spins(DB_ENV *dbenv, u_int32_t *tas_spinsp); </pre> 42 <p> 43 The <code class="methodname">DB_ENV->mutex_get_tas_spins()</code> method returns the test-and-set 44 spin count. This value may be configured using the 45 <a class="xref" href="mutexset_tas_spins.html" title="DB_ENV->mutex_set_tas_spins()">DB_ENV->mutex_set_tas_spins()</a> 46 method. 47 </p> 48 <p> 49 The <code class="methodname">DB_ENV->mutex_get_tas_spins()</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->mutex_get_tas_spins()</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="id1693509"></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="id1693809"></a>tas_spinsp</h4> 73 </div> 74 </div> 75 </div> 76 <p> 77 The <code class="methodname">DB_ENV->mutex_get_tas_spins()</code> method returns the test-and-set 78 spin count in <span class="bold"><strong>tas_spinsp</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="id1694181"></a>Class</h3> 87 </div> 88 </div> 89 </div> 90 <p> 91 <a class="link" href="env.html" title="Chapter 5. The DB_ENV Handle">DB_ENV</a> 92 </p> 93 </div> 94 <div class="sect2" lang="en" xml:lang="en"> 95 <div class="titlepage"> 96 <div> 97 <div> 98 <h3 class="title"><a id="id1693833"></a>See Also</h3> 99 </div> 100 </div> 101 </div> 102 <p> 103 <a class="xref" href="mutex.html#mutexlist" title="Mutex Methods">Mutex Methods</a> 104 </p> 105 </div> 106 </div> 107 <div class="navfooter"> 108 <hr /> 109 <table width="100%" summary="Navigation footer"> 110 <tr> 111 <td width="40%" align="left"><a accesskey="p" href="mutexget_max.html">Prev</a> </td> 112 <td width="20%" align="center"> 113 <a accesskey="u" href="mutex.html">Up</a> 114 </td> 115 <td width="40%" align="right"> <a accesskey="n" href="mutexlock.html">Next</a></td> 116 </tr> 117 <tr> 118 <td width="40%" align="left" valign="top">DB_ENV->mutex_get_max() </td> 119 <td width="20%" align="center"> 120 <a accesskey="h" href="index.html">Home</a> 121 </td> 122 <td width="40%" align="right" valign="top"> DB_ENV->mutex_lock()</td> 123 </tr> 124 </table> 125 </div> 126 </body> 127</html> 128