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_priority()</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="mempget_pgcookie.html" title="DbMpoolFile::get_pgcookie()" /> 12 <link rel="next" href="mempset_clear_len.html" title="DbMpoolFile::set_clear_len()" /> 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_priority()</th> 19 </tr> 20 <tr> 21 <td width="20%" align="left"><a accesskey="p" href="mempget_pgcookie.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_clear_len.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_priority"></a>DbMpoolFile::get_priority()</h2> 35 </div> 36 </div> 37 </div> 38 <pre class="programlisting">#include <db_cxx.h> 39 40int 41DbMpoolFile::get_priority(DB_CACHE_PRIORITY *priorityp);</pre> 42 <p> 43 44 The <code class="methodname">DbMpoolFile::get_priority()</code> method returns the cache priority for 45 the file referenced by the <a class="link" href="memp.html" title="Chapter 9. The DbMpoolFile Handle">DbMpoolFile</a> 46 handle. The priority of a page biases the replacement algorithm to be 47 more or less likely to discard a page when space is needed in the 48 cache. This value is set using the 49 <a class="xref" href="mempset_priority.html" title="DbMpoolFile::set_priority()">DbMpoolFile::set_priority()</a> 50 method. 51 </p> 52 <p> 53 The <code class="methodname">DbMpoolFile::get_priority()</code> method may be called at any time 54 during the life of the application. 55 </p> 56 <p> 57 The <code class="methodname">DbMpoolFile::get_priority()</code> <span> 58 59 <span> 60 method either returns a non-zero error value or throws an 61 exception that encapsulates a non-zero error value on 62 failure, and returns 0 on success. 63 </span> 64 </span> 65 </p> 66 <div class="sect2" lang="en" xml:lang="en"> 67 <div class="titlepage"> 68 <div> 69 <div> 70 <h3 class="title"><a id="id1695878"></a>Parameters</h3> 71 </div> 72 </div> 73 </div> 74 <div class="sect3" lang="en" xml:lang="en"> 75 <div class="titlepage"> 76 <div> 77 <div> 78 <h4 class="title"><a id="id1696157"></a>priorityp</h4> 79 </div> 80 </div> 81 </div> 82 <p> 83 The <code class="methodname">DbMpoolFile::get_priority()</code> method returns a reference to the 84 cache priority for the file referenced by the 85 <a class="link" href="memp.html" title="Chapter 9. The DbMpoolFile Handle">DbMpoolFile</a> handle in 86 <span class="bold"><strong>priorityp</strong></span>. 87 </p> 88 </div> 89 </div> 90 <div class="sect2" lang="en" xml:lang="en"> 91 <div class="titlepage"> 92 <div> 93 <div> 94 <h3 class="title"><a id="id1696158"></a>Class</h3> 95 </div> 96 </div> 97 </div> 98 <p> 99 <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> 100 </p> 101 </div> 102 <div class="sect2" lang="en" xml:lang="en"> 103 <div class="titlepage"> 104 <div> 105 <div> 106 <h3 class="title"><a id="id1695386"></a>See Also</h3> 107 </div> 108 </div> 109 </div> 110 <p> 111 <a class="xref" href="memp.html#memplist" title="Memory Pools and Related Methods">Memory Pools and Related Methods</a>, 112 <a class="xref" href="mempset_priority.html" title="DbMpoolFile::set_priority()">DbMpoolFile::set_priority()</a> 113 </p> 114 </div> 115 </div> 116 <div class="navfooter"> 117 <hr /> 118 <table width="100%" summary="Navigation footer"> 119 <tr> 120 <td width="40%" align="left"><a accesskey="p" href="mempget_pgcookie.html">Prev</a> </td> 121 <td width="20%" align="center"> 122 <a accesskey="u" href="memp.html">Up</a> 123 </td> 124 <td width="40%" align="right"> <a accesskey="n" href="mempset_clear_len.html">Next</a></td> 125 </tr> 126 <tr> 127 <td width="40%" align="left" valign="top">DbMpoolFile::get_pgcookie() </td> 128 <td width="20%" align="center"> 129 <a accesskey="h" href="index.html">Home</a> 130 </td> 131 <td width="40%" align="right" valign="top"> DbMpoolFile::set_clear_len()</td> 132 </tr> 133 </table> 134 </div> 135 </body> 136</html> 137