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131 lines
6.8 KiB
HTML
131 lines
6.8 KiB
HTML
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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->set_malloc, DB->set_realloc</title>
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<link rel="stylesheet" href="gettingStarted.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 Upgrade Guide" />
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<link rel="up" href="upgrade_3_3_toc.html" title="Chapter 11. Upgrading Berkeley DB 3.2 applications to Berkeley DB 3.3" />
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<link rel="prev" href="upgrade_3_3_getswap.html" title="DB->get_byteswapped" />
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<link rel="next" href="upgrade_3_3_conflict.html" title="DB_LOCK_CONFLICT" />
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</head>
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<body>
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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->set_malloc, DB->set_realloc</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="upgrade_3_3_getswap.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 11. Upgrading Berkeley DB 3.2 applications to Berkeley DB 3.3</th>
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<td width="20%" align="right"> <a accesskey="n" href="upgrade_3_3_conflict.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="upgrade_3_3_alloc"></a>DB->set_malloc, DB->set_realloc</h2>
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</div>
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</div>
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</div>
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<p>There are two new methods in the Berkeley DB 3.3 release:
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<a href="../api_reference/C/envset_alloc.html" class="olink">DB_ENV->set_alloc()</a>. These functions
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allow applications to specify a set of allocation functions for the
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Berkeley DB library to use when allocating memory to be owned by the
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application and when freeing memory that was originally allocated by the
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application.</p>
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<p>The new methods affect or replace the following historic methods:</p>
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<div class="variablelist">
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<dl>
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<dt>
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<span class="term">DB->set_malloc</span>
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</dt>
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<dd>The DB->set_malloc method has been replaced in its entirety.
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Applications using this method should replace the call with a call
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to <a href="../api_reference/C/dbset_alloc.html" class="olink">DB->set_alloc()</a>.</dd>
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<dt>
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<span class="term">DB->set_realloc</span>
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</dt>
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<dd>The DB->set_realloc method has been replaced in its entirety.
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Applications using this method should replace the call with a call
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to <a href="../api_reference/C/dbset_alloc.html" class="olink">DB->set_alloc()</a>.</dd>
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<dt>
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<span class="term"><a href="../api_reference/C/dbstat.html" class="olink">DB->stat()</a> method</span>
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</dt>
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<dd> has
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been replaced. Applications using this method should do as follows:
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if the argument is NULL, it should simply be removed. If non-NULL,
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it should be replaced with a call to <a href="../api_reference/C/dbset_alloc.html" class="olink">DB->set_alloc()</a>.</dd>
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<dt>
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<span class="term">lock_stat</span>
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</dt>
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<dd>The historic <span class="bold"><strong>db_malloc</strong></span> argument to the lock_stat function has
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been replaced. Applications using this function should do as follows:
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if the argument is NULL, it should simply be removed. If
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non-NULL, it should be replaced with a call to <a href="../api_reference/C/envset_alloc.html" class="olink">DB_ENV->set_alloc()</a>.</dd>
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<dt>
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<span class="term">log_archive</span>
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</dt>
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<dd>The historic <span class="bold"><strong>db_malloc</strong></span> argument to the log_archive function has
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been replaced. Applications using this function should do as follows:
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if the argument is NULL, it should simply be removed. If non-NULL,
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it should be replaced with a call to <a href="../api_reference/C/envset_alloc.html" class="olink">DB_ENV->set_alloc()</a>.</dd>
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<dt>
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<span class="term">log_stat</span>
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</dt>
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<dd>The historic <span class="bold"><strong>db_malloc</strong></span> argument to the log_stat function has
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been replaced. Applications using this function should do as follows:
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if the argument is NULL, it should simply be removed. If non-NULL,
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it should be replaced with a call to <a href="../api_reference/C/envset_alloc.html" class="olink">DB_ENV->set_alloc()</a>.</dd>
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<dt>
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<span class="term">memp_stat</span>
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</dt>
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<dd>The historic <span class="bold"><strong>db_malloc</strong></span> argument to the memp_stat function has
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been replaced. Applications using this function should do as follows:
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if the argument is NULL, it should simply be removed. If non-NULL,
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it should be replaced with a call to <a href="../api_reference/C/envset_alloc.html" class="olink">DB_ENV->set_alloc()</a>.</dd>
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<dt>
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<span class="term">txn_stat</span>
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</dt>
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<dd>The historic <span class="bold"><strong>db_malloc</strong></span> argument to the txn_stat function has
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been replaced. Applications using this function should do as follows:
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if the argument is NULL, it should simply be removed. If non-NULL,
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it should be replaced with a call to <a href="../api_reference/C/envset_alloc.html" class="olink">DB_ENV->set_alloc()</a>.</dd>
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</dl>
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</div>
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<p>One potential incompatibility for historic applications is that the
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allocation functions for a database environment must now be set before
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the environment is opened. Historically, Berkeley DB applications could open
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the environment first, and subsequently call the DB->set_malloc
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and DB->set_realloc methods; that use is no longer supported.</p>
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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="upgrade_3_3_getswap.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="upgrade_3_3_toc.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="upgrade_3_3_conflict.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->get_byteswapped </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_LOCK_CONFLICT</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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