mirror of
https://github.com/yasuhirokimura/db18
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Yasuhiro KIMURA
98 lines
4.4 KiB
HTML
98 lines
4.4 KiB
HTML
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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>DbMemoryException</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="dbexception.html" title="Chapter 6. The DbException Class" />
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<link rel="prev" href="dblocknotgranted.html" title="DbLockNotGrantedException" />
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<link rel="next" href="dbrephandledead.html" title="DbRepHandleDeadException" />
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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 18.1.40</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">DbMemoryException</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="dblocknotgranted.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 6. The DbException Class</th>
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<td width="20%" align="right"> <a accesskey="n" href="dbrephandledead.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="dbmemory"></a>DbMemoryException</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_cxx.h>
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class DbMemoryException : public DbException {
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public:
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Dbt *get_dbt() const;
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}; </pre>
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<p>
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This information describes the <code class="classname">DbMemoryException</code> class and how
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it is used by the various Berkeley DB classes.
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</p>
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<p>
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A <code class="classname">DbMemoryException</code> is thrown when there is insufficient memory to
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complete an operation, and there is the possibility of recovering. An example is during a
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<a class="xref" href="dbget.html" title="Db::get()">
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<span>Db::get()</span>
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</a> or
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<a class="xref" href="dbcget.html" title="Dbc::get()">
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<span>Dbc::get()</span>
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</a> operation with the
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<a class="link" href="dbt.html" title="Chapter 4. The Dbt Handle">Dbt</a> flags set to
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<a class="link" href="dbt.html#dbt_DB_DBT_USERMEM">DB_DBT_USERMEM</a>.
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</p>
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<p>
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The <a class="link" href="dbexception.html" title="Chapter 6. The DbException Class">DbException</a> errno value is set to
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<code class="literal">DB_BUFFER_SMALL</code> or <code class="literal">ENOMEM</code>.
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</p>
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<p>
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The <code class="methodname">get_dbt()</code> method returns the
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<a class="link" href="dbt.html" title="Chapter 4. The Dbt Handle">Dbt</a> with insufficient memory to complete the
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operation, causing the <code class="classname">DbMemoryException</code> to be thrown.
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The <a class="link" href="dbt.html" title="Chapter 4. The Dbt Handle">Dbt</a> pointer may or may not refer to valid
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memory, depending on whether the <a class="link" href="dbt.html" title="Chapter 4. The Dbt Handle">Dbt</a>
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used in the call to the failed Berkeley DB method is still in scope and has not been
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deleted.
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</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="dblocknotgranted.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="dbexception.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="dbrephandledead.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">DbLockNotGrantedException </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"> DbRepHandleDeadException</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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