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_MPOOLFILE->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��8.�� The DB_MPOOLFILE Handle" /> 11 <link rel="prev" href="mempset_flags.html" title="DB_MPOOLFILE->set_flags()" /> 12 <link rel="next" href="mempset_lsn_offset.html" title="DB_MPOOLFILE->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">DB_MPOOLFILE->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��8.�� 23 The DB_MPOOLFILE 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>DB_MPOOLFILE->set_ftype()</h2> 35 </div> 36 </div> 37 </div> 38 <pre class="programlisting">#include <db.h> 39 40int 41DB_MPOOLFILE->set_ftype(DB_MPOOLFILE *mpf, int ftype); </pre> 42 <p> 43 The <code class="methodname">DB_MPOOLFILE->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">DB_MPOOLFILE->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��8.�� The DB_MPOOLFILE Handle">DB_MPOOLFILE</a> handle. 51 </p> 52 <p> 53 The <code class="methodname">DB_MPOOLFILE->set_ftype()</code> method may not be called after the 54 <a class="xref" href="mempfopen.html" title="DB_MPOOLFILE->open()">DB_MPOOLFILE->open()</a> 55 method is called. If the file is already open in the cache when 56 <a class="xref" href="mempfopen.html" title="DB_MPOOLFILE->open()">DB_MPOOLFILE->open()</a> is 57 called, the information specified to <code class="methodname">DB_MPOOLFILE->set_ftype()</code> will 58 replace the existing information. 59 </p> 60 <p> 61 The <code class="methodname">DB_MPOOLFILE->set_ftype()</code> <span> 62 <span> 63 method returns a non-zero error value on failure and 0 on success. 64 </span> 65 66 </span> 67 </p> 68 <div class="sect2" lang="en" xml:lang="en"> 69 <div class="titlepage"> 70 <div> 71 <div> 72 <h3 class="title"><a id="id1692180"></a>Parameters</h3> 73 </div> 74 </div> 75 </div> 76 <div class="sect3" lang="en" xml:lang="en"> 77 <div class="titlepage"> 78 <div> 79 <div> 80 <h4 class="title"><a id="id1692458"></a>ftype</h4> 81 </div> 82 </div> 83 </div> 84 <p> 85 The <span class="bold"><strong>ftype</strong></span> parameter sets the file's 86 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 87 <a class="xref" href="mempregister.html" title="DB_ENV->memp_register()">DB_ENV->memp_register()</a> 88 method. 89 </p> 90 </div> 91 </div> 92 <div class="sect2" lang="en" xml:lang="en"> 93 <div class="titlepage"> 94 <div> 95 <div> 96 <h3 class="title"><a id="id1692309"></a>Class</h3> 97 </div> 98 </div> 99 </div> 100 <p> 101 <a class="link" href="env.html" title="Chapter��5.�� The DB_ENV Handle">DB_ENV</a>, <a class="link" href="memp.html" title="Chapter��8.�� The DB_MPOOLFILE Handle">DB_MPOOLFILE</a> 102 </p> 103 </div> 104 <div class="sect2" lang="en" xml:lang="en"> 105 <div class="titlepage"> 106 <div> 107 <div> 108 <h3 class="title"><a id="id1692456"></a>See Also</h3> 109 </div> 110 </div> 111 </div> 112 <p> 113 <a class="xref" href="memp.html#memplist" title="Memory Pools and Related Methods">Memory Pools and Related Methods</a> 114 </p> 115 </div> 116 </div> 117 <div class="navfooter"> 118 <hr /> 119 <table width="100%" summary="Navigation footer"> 120 <tr> 121 <td width="40%" align="left"><a accesskey="p" href="mempset_flags.html">Prev</a>��</td> 122 <td width="20%" align="center"> 123 <a accesskey="u" href="memp.html">Up</a> 124 </td> 125 <td width="40%" align="right">��<a accesskey="n" href="mempset_lsn_offset.html">Next</a></td> 126 </tr> 127 <tr> 128 <td width="40%" align="left" valign="top">DB_MPOOLFILE->set_flags()��</td> 129 <td width="20%" align="center"> 130 <a accesskey="h" href="index.html">Home</a> 131 </td> 132 <td width="40%" align="right" valign="top">��DB_MPOOLFILE->set_lsn_offset()</td> 133 </tr> 134 </table> 135 </div> 136 </body> 137</html> 138