<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>DbMemoryException</title> <link rel="stylesheet" href="apiReference.css" type="text/css" /> <meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /> <link rel="start" href="index.html" title="Berkeley DB C++ API Reference" /> <link rel="up" href="dbexception.html" title="Chapter 6. The DbException Class" /> <link rel="prev" href="dblocknotgranted.html" title="DbLockNotGrantedException" /> <link rel="next" href="dbrephandledead.html" title="DbRepHandleDeadException" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">DbMemoryException</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="dblocknotgranted.html">Prev</a> </td> <th width="60%" align="center">Chapter 6. The DbException Class</th> <td width="20%" align="right"> <a accesskey="n" href="dbrephandledead.html">Next</a></td> </tr> </table> <hr /> </div> <div class="sect1" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h2 class="title" style="clear: both"><a id="dbmemory"></a>DbMemoryException</h2> </div> </div> </div> <pre class="programlisting">#include <db_cxx.h> class DbMemoryException : public DbException { public: Dbt *get_dbt() const; }; </pre> <p> This information describes the <code class="classname">DbMemoryException</code> class and how it is used by the various Berkeley DB classes. </p> <p> A <code class="classname">DbMemoryException</code> is thrown when there is insufficient memory to complete an operation, and there is the possibility of recovering. An example is during a <a class="xref" href="dbget.html" title="Db::get()">Db::get()</a> or <a class="xref" href="dbcget.html" title="Dbc::get()">Dbc::get()</a> operation with the <a class="link" href="dbt.html" title="Chapter 4. The Dbt Handle">Dbt</a> flags set to <a class="link" href="dbt.html#dbt_DB_DBT_USERMEM">DB_DBT_USERMEM</a>. </p> <p> The <a class="link" href="dbexception.html" title="Chapter 6. The DbException Class">DbException</a> errno value is set to <code class="literal">DB_BUFFER_SMALL</code> or <code class="literal">ENOMEM</code>. </p> <p> The <code class="methodname">get_dbt()</code> method returns the <a class="link" href="dbt.html" title="Chapter 4. The Dbt Handle">Dbt</a> with insufficient memory to complete the operation, causing the <code class="classname">DbMemoryException</code> to be thrown. The <a class="link" href="dbt.html" title="Chapter 4. The Dbt Handle">Dbt</a> pointer may or may not refer to valid memory, depending on whether the <a class="link" href="dbt.html" title="Chapter 4. The Dbt Handle">Dbt</a> used in the call to the failed Berkeley DB method is still in scope and has not been deleted. </p> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="dblocknotgranted.html">Prev</a> </td> <td width="20%" align="center"> <a accesskey="u" href="dbexception.html">Up</a> </td> <td width="40%" align="right"> <a accesskey="n" href="dbrephandledead.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">DbLockNotGrantedException </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> DbRepHandleDeadException</td> </tr> </table> </div> </body> </html>