1<!--$Id: log_flush.so,v 10.31 2004/08/13 03:38:57 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::log_flush</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::log_flush</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::log_flush(const DbLsn *lsn); 26</pre></b> 27<hr size=1 noshade> 28<b>Description: DbEnv::log_flush</b> 29<p>The DbEnv::log_flush method writes log records to disk.</p> 30<p>The DbEnv::log_flush method 31either returns a non-zero error value 32or throws an exception that encapsulates a non-zero error value on 33failure, and returns 0 on success. 34</p> 35<b>Parameters</b> <br> 36 <b>lsn</b><ul compact><li>All log records with <a href="/api_cxx/lsn_class.html">DbLsn</a> values less than or equal to the 37<b>lsn</b> parameter are written to disk. If <b>lsn</b> is NULL, 38all records in the log are flushed.</ul> 39<br> 40<br><b>Errors</b> 41<p>The DbEnv::log_flush method 42may fail and throw 43<a href="/api_cxx/except_class.html">DbException</a>, 44encapsulating one of the following non-zero errors, or return one of 45the following non-zero errors:</p> 46<br> 47<b>EINVAL</b><ul compact><li>An 48invalid flag value or parameter was specified.</ul> 49<br> 50<hr size=1 noshade> 51<br><b>Class</b> 52<a href="/api_cxx/env_class.html">DbEnv</a>, <a href="/api_cxx/logc_class.html">DbLogc</a>, <a href="/api_cxx/lsn_class.html">DbLsn</a> 53<br><b>See Also</b> 54<a href="/api_cxx/log_list.html">Logging Subsystem and Related Methods</a> 55</tt> 56<table width="100%"><tr><td><br></td><td align=right> 57<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> 58</td></tr></table> 59<p><font size=1>Copyright (c) 1996,2008 Oracle. All rights reserved.</font> 60</body> 61</html> 62