1<!--$Id: memp_class.so,v 10.21 2006/10/24 15:47:59 bostic Exp $--> 2<!--Copyright (c) 1997,2008 Oracle. All rights reserved.--> 3<!--See the file LICENSE for redistribution information.--> 4<html> 5<head> 6<title>Berkeley DB: DbMemoryException</title> 7<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit."> 8<meta name="keywords" content="embedded,database,programmatic,toolkit,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++"> 9</head> 10<body bgcolor=white> 11<table width="100%"><tr valign=top> 12<td> 13<b>DbMemoryException</b> 14</td> 15<td align=right> 16<a href="../api_cxx/api_core.html"><img src="../images/api.gif" alt="API"></a> 17<a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a></td> 18</tr></table> 19<hr size=1 noshade> 20<tt> 21<b><pre> 22#include <db_cxx.h> 23<p> 24class DbMemoryException : public DbException { 25public: 26 Dbt *get_dbt() const; 27}; 28</pre></b> 29<hr size=1 noshade> 30<b>Description: DbMemoryException</b> 31<p>This information describes the DbMemoryException class and how 32it is used by the various Db* classes.</p> 33<p>A DbMemoryException is thrown when there is insufficient memory 34to complete an operation, and there is the possibility of recovering. 35An example is during a <a href="../api_cxx/db_get.html">Db::get</a> or <a href="../api_cxx/dbc_get.html">Dbc::get</a> operation with 36the <a href="../api_cxx/dbt_class.html">Dbt</a> flags set to <a href="../api_cxx/dbt_class.html#DB_DBT_USERMEM">DB_DBT_USERMEM</a>.</p> 37<a name="2"><!--meow--></a> 38<p>The <a href="../api_cxx/except_class.html">DbException</a> errno value is set to <a href="../api_cxx/dbt_class.html#DB_BUFFER_SMALL">DB_BUFFER_SMALL</a> 39or ENOMEM.</p> 40<p>The <b>get_dbt</b> method returns the <a href="../api_cxx/dbt_class.html">Dbt</a> with insufficient 41memory to complete the operation, causing the DbMemoryException 42to be thrown. 43The <a href="../api_cxx/dbt_class.html">Dbt</a> pointer may or may not refer to valid memory, depending 44on whether the <a href="../api_cxx/dbt_class.html">Dbt</a> used in the call to the failed Berkeley DB method 45is still in scope and has not been deleted.</p> 46</tt> 47<table width="100%"><tr><td><br></td><td align=right> 48<a href="../api_cxx/api_core.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a> 49</td></tr></table> 50<p><font size=1>Copyright (c) 1996,2008 Oracle. All rights reserved.</font> 51</body> 52</html> 53