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>DbMemoryException</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="dbexception.html" title="Chapter 6. The DbException Class" /> 11 <link rel="prev" href="dblocknotgranted.html" title="DbLockNotGrantedException" /> 12 <link rel="next" href="dbrephandledead.html" title="DbRepHandleDeadException" /> 13 </head> 14 <body> 15 <div class="navheader"> 16 <table width="100%" summary="Navigation header"> 17 <tr> 18 <th colspan="3" align="center">DbMemoryException</th> 19 </tr> 20 <tr> 21 <td width="20%" align="left"><a accesskey="p" href="dblocknotgranted.html">Prev</a> </td> 22 <th width="60%" align="center">Chapter 6. The DbException Class</th> 23 <td width="20%" align="right"> <a accesskey="n" href="dbrephandledead.html">Next</a></td> 24 </tr> 25 </table> 26 <hr /> 27 </div> 28 <div class="sect1" lang="en" xml:lang="en"> 29 <div class="titlepage"> 30 <div> 31 <div> 32 <h2 class="title" style="clear: both"><a id="dbmemory"></a>DbMemoryException</h2> 33 </div> 34 </div> 35 </div> 36 <pre class="programlisting">#include <db_cxx.h> 37 38class DbMemoryException : public DbException { 39public: 40 Dbt *get_dbt() const; 41}; </pre> 42 <p> 43 This information describes the <code class="classname">DbMemoryException</code> class and how 44 it is used by the various Berkeley DB classes. 45 </p> 46 <p> 47 A <code class="classname">DbMemoryException</code> is thrown when there is insufficient memory to 48 complete an operation, and there is the possibility of recovering. An example is during a 49 <a class="xref" href="dbget.html" title="Db::get()">Db::get()</a> or 50 <a class="xref" href="dbcget.html" title="Dbc::get()">Dbc::get()</a> operation with the 51 <a class="link" href="dbt.html" title="Chapter 4. The Dbt Handle">Dbt</a> flags set to 52 <a class="link" href="dbt.html#dbt_DB_DBT_USERMEM">DB_DBT_USERMEM</a>. 53 </p> 54 <p> 55 The <a class="link" href="dbexception.html" title="Chapter 6. The DbException Class">DbException</a> errno value is set to 56 <code class="literal">DB_BUFFER_SMALL</code> or <code class="literal">ENOMEM</code>. 57 </p> 58 <p> 59 The <code class="methodname">get_dbt()</code> method returns the 60 <a class="link" href="dbt.html" title="Chapter 4. The Dbt Handle">Dbt</a> with insufficient memory to complete the 61 operation, causing the <code class="classname">DbMemoryException</code> to be thrown. 62 The <a class="link" href="dbt.html" title="Chapter 4. The Dbt Handle">Dbt</a> pointer may or may not refer to valid 63 memory, depending on whether the <a class="link" href="dbt.html" title="Chapter 4. The Dbt Handle">Dbt</a> 64 used in the call to the failed Berkeley DB method is still in scope and has not been 65 deleted. 66 </p> 67 </div> 68 <div class="navfooter"> 69 <hr /> 70 <table width="100%" summary="Navigation footer"> 71 <tr> 72 <td width="40%" align="left"><a accesskey="p" href="dblocknotgranted.html">Prev</a> </td> 73 <td width="20%" align="center"> 74 <a accesskey="u" href="dbexception.html">Up</a> 75 </td> 76 <td width="40%" align="right"> <a accesskey="n" href="dbrephandledead.html">Next</a></td> 77 </tr> 78 <tr> 79 <td width="40%" align="left" valign="top">DbLockNotGrantedException </td> 80 <td width="20%" align="center"> 81 <a accesskey="h" href="index.html">Home</a> 82 </td> 83 <td width="40%" align="right" valign="top"> DbRepHandleDeadException</td> 84 </tr> 85 </table> 86 </div> 87 </body> 88</html> 89