1<!--$Id: mutex_unlock.so,v 10.2 2007/09/21 20:06:03 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: DbEnv::mutex_unlock</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>DbEnv::mutex_unlock</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> 24int 25DbEnv::mutex_unlock(db_mutex_t mutex); 26</pre></b> 27<hr size=1 noshade> 28<b>Description: DbEnv::mutex_unlock</b> 29<p>The DbEnv::mutex_unlock method unlocks the mutex locked by 30<a href="../api_cxx/mutex_lock.html">DbEnv::mutex_lock</a>.</p> 31<p>The DbEnv::mutex_unlock method may not be called before the <a href="../api_cxx/env_open.html">DbEnv::open</a> method is called.</p> 32<p>The DbEnv::mutex_unlock method 33either returns a non-zero error value 34or throws an exception that encapsulates a non-zero error value on 35failure, and returns 0 on success. 36</p> 37<b>Parameters</b> <br> 38 <b>mutex</b><ul compact><li>The <b>mutex</b> parameter is a mutex previously locked by 39<a href="../api_cxx/mutex_lock.html">DbEnv::mutex_lock</a>.</ul> 40<br> 41<br><b>Errors</b> 42<p>The DbEnv::mutex_unlock method 43may fail and throw 44<a href="../api_cxx/except_class.html">DbException</a>, 45encapsulating one of the following non-zero errors, or return one of 46the following non-zero errors:</p> 47<br> 48<b>EINVAL</b><ul compact><li>An 49invalid flag value or parameter was specified.</ul> 50<br> 51<hr size=1 noshade> 52<br><b>Class</b> 53<a href="../api_cxx/env_class.html">DbEnv</a> 54<br><b>See Also</b> 55<a href="../api_cxx/env_list.html">Database Environments and Related Methods</a> 56</tt> 57<table width="100%"><tr><td><br></td><td align=right> 58<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> 59</td></tr></table> 60<p><font size=1>Copyright (c) 1996,2008 Oracle. All rights reserved.</font> 61</body> 62</html> 63