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>DbMpoolFile::get_clear_len()</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="memp.html" title="Chapter��9.�� The DbMpoolFile Handle" /> 11 <link rel="prev" href="mempfsync.html" title="DbMpoolFile::sync()" /> 12 <link rel="next" href="mempget_fileid.html" title="DbMpoolFile::get_fileid()" /> 13 </head> 14 <body> 15 <div class="navheader"> 16 <table width="100%" summary="Navigation header"> 17 <tr> 18 <th colspan="3" align="center">DbMpoolFile::get_clear_len()</th> 19 </tr> 20 <tr> 21 <td width="20%" align="left"><a accesskey="p" href="mempfsync.html">Prev</a>��</td> 22 <th width="60%" align="center">Chapter��9.�� 23 The DbMpoolFile Handle 24 </th> 25 <td width="20%" align="right">��<a accesskey="n" href="mempget_fileid.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="mempget_clear_len"></a>DbMpoolFile::get_clear_len()</h2> 35 </div> 36 </div> 37 </div> 38 <pre class="programlisting">#include <db_cxx.h> 39 40int 41DbMpoolFile::get_clear_len(u_int32_t *lenp);</pre> 42 <p> 43 The <code class="methodname">DbMpoolFile::get_clear_len()</code> method returns the bytes to be 44 cleared. 45 </p> 46 <p> 47 The <code class="methodname">DbMpoolFile::get_clear_len()</code> method may be called at any time 48 during the life of the application. 49 </p> 50 <p> 51 The <code class="methodname">DbMpoolFile::get_clear_len()</code> <span> 52 53 <span> 54 method either returns a non-zero error value or throws an 55 exception that encapsulates a non-zero error value on 56 failure, and returns 0 on success. 57 </span> 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="id1695275"></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="id1695389"></a>lenp</h4> 73 </div> 74 </div> 75 </div> 76 <p> 77 The <code class="methodname">DbMpoolFile::get_clear_len()</code> method returns the bytes to be 78 cleared in <span class="bold"><strong>lenp</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="id1694820"></a>Class</h3> 87 </div> 88 </div> 89 </div> 90 <p> 91 <a class="link" href="env.html" title="Chapter��5.�� The DbEnv Handle">DbEnv</a>, <a class="link" href="memp.html" title="Chapter��9.�� The DbMpoolFile Handle">DbMpoolFile</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="id1695268"></a>See Also</h3> 99 </div> 100 </div> 101 </div> 102 <p> 103 <a class="xref" href="memp.html#memplist" title="Memory Pools and Related Methods">Memory Pools and Related 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="mempfsync.html">Prev</a>��</td> 112 <td width="20%" align="center"> 113 <a accesskey="u" href="memp.html">Up</a> 114 </td> 115 <td width="40%" align="right">��<a accesskey="n" href="mempget_fileid.html">Next</a></td> 116 </tr> 117 <tr> 118 <td width="40%" align="left" valign="top">DbMpoolFile::sync()��</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">��DbMpoolFile::get_fileid()</td> 123 </tr> 124 </table> 125 </div> 126 </body> 127</html> 128