1<!--$Id: malloc.so,v 10.20 2001/04/03 16:27:58 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 Reference Guide: Non-local memory allocation</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><b><dl><dt>Berkeley DB Reference Guide:<dd>Access Methods</dl></b></td> 13<td align=right><a href="../am_conf/dup.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../am_conf/bt_compare.html"><img src="../../images/next.gif" alt="Next"></a> 14</td></tr></table> 15<p align=center><b>Non-local memory allocation</b></p> 16<p>Berkeley DB allocates memory for returning key/data pairs and statistical 17information which becomes the responsibility of the application. 18There are also interfaces where an application will allocate memory 19which becomes the responsibility of Berkeley DB.</p> 20<p>On systems in which there may be multiple library versions of the 21standard allocation routines (notably Windows NT), transferring memory 22between the library and the application will fail because the Berkeley DB 23library allocates memory from a different heap than the application 24uses to free it, or vice versa. To avoid this problem, the 25<a href="../../api_c/env_set_alloc.html">DB_ENV->set_alloc</a> and <a href="../../api_c/db_set_alloc.html">DB->set_alloc</a> methods can be used to 26give Berkeley DB references to the application's allocation routines.</p> 27<table width="100%"><tr><td><br></td><td align=right><a href="../am_conf/dup.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../am_conf/bt_compare.html"><img src="../../images/next.gif" alt="Next"></a> 28</td></tr></table> 29<p><font size=1>Copyright (c) 1996,2008 Oracle. All rights reserved.</font> 30</body> 31</html> 32
