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234 lines
8.2 KiB
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>DB_MPOOLFILE->put()</title>
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<link rel="stylesheet" href="apiReference.css" type="text/css" />
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<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
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<link rel="start" href="index.html" title="Berkeley DB C API Reference" />
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<link rel="up" href="memp.html" title="Chapter 8. The DB_MPOOLFILE Handle" />
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<link rel="prev" href="mempfopen.html" title="DB_MPOOLFILE->open()" />
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<link rel="next" href="mempfsync.html" title="DB_MPOOLFILE->sync()" />
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<div xmlns="" class="navheader">
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<div class="libver">
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<p>Library Version 11.2.5.2</p>
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</div>
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center">DB_MPOOLFILE->put()</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="mempfopen.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 8.
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The DB_MPOOLFILE Handle
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</th>
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<td width="20%" align="right"> <a accesskey="n" href="mempfsync.html">Next</a></td>
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</tr>
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</table>
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<hr />
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</div>
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<div class="sect1" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h2 class="title" style="clear: both"><a id="mempput"></a>DB_MPOOLFILE->put()</h2>
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</div>
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</div>
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</div>
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<pre class="programlisting">#include <db.h>
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int
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DB_MPOOLFILE->put(DB_MPOOLFILE *mpf,
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void *pgaddr, DB_CACHE_PRIORITY priority, u_int32_t flags); </pre>
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<p>
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The <code class="methodname">DB_MPOOLFILE->put()</code> method returns a reference to a page in the
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cache, setting the priority of the page as specified by the <span class="bold"><strong>priority</strong></span> parameter.
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</p>
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<p>
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The <code class="methodname">DB_MPOOLFILE->put()</code> <span>
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<span>
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method returns a non-zero error value on failure and 0 on success.
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</span>
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</span>
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</p>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="id3917756"></a>Parameters</h3>
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</div>
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</div>
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</div>
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<div class="sect3" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h4 class="title"><a id="id3917881"></a>pgaddr</h4>
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</div>
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</div>
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</div>
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<p>
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The <span class="bold"><strong>pgaddr</strong></span> parameter is the address
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of the page to be returned to the cache. The <span class="bold"><strong>pgaddr</strong></span> parameter must be a value previously
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returned by the
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<a class="xref" href="mempfget.html" title="DB_MPOOLFILE->get()">DB_MPOOLFILE->get()</a> method.
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</p>
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</div>
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<div class="sect3" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h4 class="title"><a id="id3918202"></a>priority</h4>
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</div>
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</div>
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</div>
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<p>
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Set the page's <span class="bold"><strong>priority</strong></span> as follows:
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</p>
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<div class="itemizedlist">
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<ul type="disc">
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<li>
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<p><a id="fput_DB_PRIORITY_UNCHANGED"></a>
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<code class="literal">DB_PRIORITY_UNCHANGED</code>
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</p>
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<p>
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The priority is unchanged.
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</p>
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</li>
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<li>
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<p>
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<code class="literal">DB_PRIORITY_VERY_LOW</code>
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</p>
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<p>
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The lowest priority: pages are the most likely to be discarded.
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</p>
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</li>
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<li>
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<p>
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<code class="literal">DB_PRIORITY_LOW</code>
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</p>
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<p>
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The next lowest priority.
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</p>
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</li>
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<li>
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<p>
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<code class="literal">DB_PRIORITY_DEFAULT</code>
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</p>
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<p>
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The default priority.
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</p>
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</li>
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<li>
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<p>
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<code class="literal">DB_PRIORITY_HIGH</code>
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</p>
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<p>
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The next highest priority.
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</p>
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</li>
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<li>
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<p>
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<code class="literal">DB_PRIORITY_VERY_HIGH</code>
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</p>
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<p>
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The highest priority: pages are the least likely to be discarded.
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</p>
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</li>
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</ul>
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</div>
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</div>
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<div class="sect3" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h4 class="title"><a id="id3918454"></a>flags</h4>
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</div>
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</div>
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</div>
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<p>
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The <span class="bold"><strong>flags</strong></span> parameter is currently
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unused, and must be set to 0.
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</p>
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</div>
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</div>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="id3918476"></a>Errors</h3>
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</div>
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</div>
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</div>
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<p>
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The <code class="methodname">DB_MPOOLFILE->put()</code> <span>
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<span>
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method may fail and return one of the following non-zero errors:
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</span>
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</span>
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</p>
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<div class="sect3" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h4 class="title"><a id="id3918062"></a>EINVAL</h4>
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</div>
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</div>
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</div>
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<p>
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An invalid flag value or parameter was specified.
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</p>
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</div>
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</div>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="id3918347"></a>Class</h3>
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</div>
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</div>
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</div>
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<p>
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<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>
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</p>
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</div>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="id3917247"></a>See Also</h3>
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</div>
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</div>
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</div>
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<p>
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<a class="xref" href="memp.html#memplist" title="Memory Pools and Related Methods">Memory Pools and Related Methods</a>
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</p>
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</div>
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</div>
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<div class="navfooter">
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<hr />
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<table width="100%" summary="Navigation footer">
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<tr>
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<td width="40%" align="left"><a accesskey="p" href="mempfopen.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="memp.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="mempfsync.html">Next</a></td>
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</tr>
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<tr>
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<td width="40%" align="left" valign="top">DB_MPOOLFILE->open() </td>
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<td width="20%" align="center">
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<a accesskey="h" href="index.html">Home</a>
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</td>
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<td width="40%" align="right" valign="top"> DB_MPOOLFILE->sync()</td>
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</tr>
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</table>
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</div>
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</body>
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</html>
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