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::set_ftype()</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="mempset_flags.html" title="DbMpoolFile::set_flags()" /> 12 <link rel="next" href="mempset_lsn_offset.html" title="DbMpoolFile::set_lsn_offset()" /> 13 </head> 14 <body> 15 <div class="navheader"> 16 <table width="100%" summary="Navigation header"> 17 <tr> 18 <th colspan="3" align="center">DbMpoolFile::set_ftype()</th> 19 </tr> 20 <tr> 21 <td width="20%" align="left"><a accesskey="p" href="mempset_flags.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="mempset_lsn_offset.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="mempset_ftype"></a>DbMpoolFile::set_ftype()</h2> 35 </div> 36 </div> 37 </div> 38 <pre class="programlisting">#include <db_cxx.h> 39 40int 41DbMpoolFile::set_flags(int ftype); </pre> 42 <p> 43 The <code class="methodname">DbMpoolFile::set_ftype()</code> method specifies a file type for the 44 purposes of input or output processing of the file's pages as they are 45 read from or written to, the backing filesystem store. 46 </p> 47 <p> 48 The <code class="methodname">DbMpoolFile::set_ftype()</code> method configures a file in the 49 cache, not only operations performed using the specified 50 <a class="link" href="memp.html" title="Chapter 9. The DbMpoolFile Handle">DbMpoolFile</a> handle. 51 </p> 52 <p> 53 The <code class="methodname">DbMpoolFile::set_ftype()</code> method may not be called after the 54 <a class="xref" href="mempfopen.html" title="DbMpoolFile::open()">DbMpoolFile::open()</a> 55 method is called. If the file is already open in the cache when 56 <a class="xref" href="mempfopen.html" title="DbMpoolFile::open()">DbMpoolFile::open()</a> is 57 called, the information specified to <code class="methodname">DbMpoolFile::set_ftype()</code> will 58 replace the existing information. 59 </p> 60 <p> 61 The <code class="methodname">DbMpoolFile::set_ftype()</code> <span> 62 63 <span> 64 method either returns a non-zero error value or throws an 65 exception that encapsulates a non-zero error value on 66 failure, and returns 0 on success. 67 </span> 68 </span> 69 </p> 70 <div class="sect2" lang="en" xml:lang="en"> 71 <div class="titlepage"> 72 <div> 73 <div> 74 <h3 class="title"><a id="id1696945"></a>Parameters</h3> 75 </div> 76 </div> 77 </div> 78 <div class="sect3" lang="en" xml:lang="en"> 79 <div class="titlepage"> 80 <div> 81 <div> 82 <h4 class="title"><a id="id1697141"></a>ftype</h4> 83 </div> 84 </div> 85 </div> 86 <p> 87 The <span class="bold"><strong>ftype</strong></span> parameter sets the file's 88 type for the purposes of input and output processing. The <span class="bold"><strong>ftype</strong></span> must be the same as a <span class="bold"><strong>ftype</strong></span> parameter previously specified to the 89 <a class="xref" href="mempregister.html" title="DbEnv::memp_register()">DbEnv::memp_register()</a> 90 method. 91 </p> 92 </div> 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="id1697139"></a>Class</h3> 99 </div> 100 </div> 101 </div> 102 <p> 103 <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> 104 </p> 105 </div> 106 <div class="sect2" lang="en" xml:lang="en"> 107 <div class="titlepage"> 108 <div> 109 <div> 110 <h3 class="title"><a id="id1696934"></a>See Also</h3> 111 </div> 112 </div> 113 </div> 114 <p> 115 <a class="xref" href="memp.html#memplist" title="Memory Pools and Related Methods">Memory Pools and Related Methods</a> 116 </p> 117 </div> 118 </div> 119 <div class="navfooter"> 120 <hr /> 121 <table width="100%" summary="Navigation footer"> 122 <tr> 123 <td width="40%" align="left"><a accesskey="p" href="mempset_flags.html">Prev</a> </td> 124 <td width="20%" align="center"> 125 <a accesskey="u" href="memp.html">Up</a> 126 </td> 127 <td width="40%" align="right"> <a accesskey="n" href="mempset_lsn_offset.html">Next</a></td> 128 </tr> 129 <tr> 130 <td width="40%" align="left" valign="top">DbMpoolFile::set_flags() </td> 131 <td width="20%" align="center"> 132 <a accesskey="h" href="index.html">Home</a> 133 </td> 134 <td width="40%" align="right" valign="top"> DbMpoolFile::set_lsn_offset()</td> 135 </tr> 136 </table> 137 </div> 138 </body> 139</html> 140