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->get_q_extentsize()</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="db.html" title="Chapter��2.�� The DB Handle" /> 11 <link rel="prev" href="dbget_priority.html" title="DB->get_priority()" /> 12 <link rel="next" href="dbget_re_delim.html" title="DB->get_re_delim()" /> 13 </head> 14 <body> 15 <div class="navheader"> 16 <table width="100%" summary="Navigation header"> 17 <tr> 18 <th colspan="3" align="center">DB->get_q_extentsize()</th> 19 </tr> 20 <tr> 21 <td width="20%" align="left"><a accesskey="p" href="dbget_priority.html">Prev</a>��</td> 22 <th width="60%" align="center">Chapter��2.�� 23 The DB Handle 24 </th> 25 <td width="20%" align="right">��<a accesskey="n" href="dbget_re_delim.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="dbget_q_extentsize"></a>DB->get_q_extentsize()</h2> 35 </div> 36 </div> 37 </div> 38 <pre class="programlisting">#include <db.h> 39 40int 41DB->get_q_extentsize(DB *db, u_int32_t *extentsizep); </pre> 42 <p> 43 The <code class="methodname">DB->get_q_extentsize()</code> method returns the number of pages in an 44 extent. This value is used only for Queue databases and is set using the 45 <a class="xref" href="dbset_q_extentsize.html" title="DB->set_q_extentsize()">DB->set_q_extentsize()</a> 46 method. 47 </p> 48 <p> 49 The <code class="methodname">DB->get_q_extentsize()</code> method may be 50 called only after the database has been opened. 51 </p> 52 <p> 53 The <code class="methodname">DB->get_q_extentsize()</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="id1637979"></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="id1637936"></a>extentsizep</h4> 73 </div> 74 </div> 75 </div> 76 <p> 77 The <code class="methodname">DB->get_q_extentsize()</code> method returns the number of pages in an 78 extent in <span class="bold"><strong>extentsizep</strong></span>. If used on a handle that has not yet been opened, 79 <code class="literal">0</code> is returned. 80 </p> 81 </div> 82 </div> 83 <div class="sect2" lang="en" xml:lang="en"> 84 <div class="titlepage"> 85 <div> 86 <div> 87 <h3 class="title"><a id="id1637805"></a>Class</h3> 88 </div> 89 </div> 90 </div> 91 <p> 92 <a class="link" href="db.html" title="Chapter��2.�� The DB Handle">DB</a> 93 </p> 94 </div> 95 <div class="sect2" lang="en" xml:lang="en"> 96 <div class="titlepage"> 97 <div> 98 <div> 99 <h3 class="title"><a id="id1637653"></a>See Also</h3> 100 </div> 101 </div> 102 </div> 103 <p> 104 <a class="xref" href="db.html#dblist" title="Database and Related Methods">Database and Related Methods</a>, 105 <a class="xref" href="dbset_q_extentsize.html" title="DB->set_q_extentsize()">DB->set_q_extentsize()</a> 106 </p> 107 </div> 108 </div> 109 <div class="navfooter"> 110 <hr /> 111 <table width="100%" summary="Navigation footer"> 112 <tr> 113 <td width="40%" align="left"><a accesskey="p" href="dbget_priority.html">Prev</a>��</td> 114 <td width="20%" align="center"> 115 <a accesskey="u" href="db.html">Up</a> 116 </td> 117 <td width="40%" align="right">��<a accesskey="n" href="dbget_re_delim.html">Next</a></td> 118 </tr> 119 <tr> 120 <td width="40%" align="left" valign="top">DB->get_priority()��</td> 121 <td width="20%" align="center"> 122 <a accesskey="h" href="index.html">Home</a> 123 </td> 124 <td width="40%" align="right" valign="top">��DB->get_re_delim()</td> 125 </tr> 126 </table> 127 </div> 128 </body> 129</html> 130