<!--$Id: set_func_unmap.so,v 10.17 2003/11/08 19:17:50 bostic Exp $--> <!--Copyright 1997-2003 by Sleepycat Software, Inc.--> <!--All rights reserved.--> <!--See the file LICENSE for redistribution information.--> <html> <head> <title>Berkeley DB: db_env_set_func_unmap</title> <meta name="description" content="Berkeley DB: An embedded database programmatic toolkit."> <meta name="keywords" content="embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++"> </head> <body bgcolor=white> <a name="2"><!--meow--></a> <table width="100%"><tr valign=top> <td> <h3>db_env_set_func_unmap</h3> </td> <td align=right> <a href="../../db42-devel-4.2.52/api_c/api_index.html"><img src="../../db42-4.2.52/images/api.gif" alt="API"></a> <a href="../../db42-devel-4.2.52/ref/toc.html"><img src="../../db42-4.2.52/images/ref.gif" alt="Ref"></a> </td></tr></table> <hr size=1 noshade> <tt> <h3><pre> #include <db.h> <p> int db_env_set_func_unmap(int (*func_unmap)(void *addr, size_t len)); </pre></h3> <hr size=1 noshade> <h3>Description: db_env_set_func_unmap</h3> <p>The Berkeley DB library requires the ability to unmap a file or shared memory region from memory.</p> <p>The db_env_set_func_unmap method configures all operations performed by a process and all of its threads of control, not operations confined to a single database environment.</p> <p>Although the db_env_set_func_unmap method may be called at any time during the life of the application, it should normally be called before making calls to the <a href="../../db42-devel-4.2.52/api_c/env_class.html">db_env_create</a> or <a href="../../db42-devel-4.2.52/api_c/db_class.html">db_create</a> methods.</p> <p>The db_env_set_func_unmap method returns a non-zero error value on failure and 0 on success. </p> <h3>Parameters</h3> <p><dl compact> <p><dt><b>func_unmap</b><dd> The <b>func_unmap</b> parameter is the function which unmaps a file or shared memory region. <p>The <b>addr</b> parameter is the value returned by the <a href="../../db42-devel-4.2.52/api_c/set_func_map.html">db_env_set_func_map</a> function when the file or region was mapped into memory, and the <b>len</b> parameter is the same as the <b>len</b> parameter specified to the <a href="../../db42-devel-4.2.52/api_c/set_func_map.html">db_env_set_func_map</a> function when the file or region was mapped into memory.</p> <p>The <b>func_unmap</b> function must return the value of <b>errno</b> on failure and 0 on success.</p> </dl> <h3>See Also</h3> <a href="../../db42-devel-4.2.52/ref/program/runtime.html">Run-time configuration</a> </tt> <table width="100%"><tr><td><br></td><td align=right> <a href="../../db42-devel-4.2.52/api_c/api_index.html"><img src="../../db42-4.2.52/images/api.gif" alt="API"></a><a href="../../db42-devel-4.2.52/ref/toc.html"><img src="../../db42-4.2.52/images/ref.gif" alt="Ref"></a> </td></tr></table> <p><font size=1><a href="../../db42-devel-4.2.52/sleepycat/legal.html">Copyright (c) 1996-2003</a> <a href="http://www.sleepycat.com">Sleepycat Software, Inc.</a> - All rights reserved.</font> </body> </html>
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