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<!--$Id: log_flush.so,v 10.31 2004/08/13 03:38:57 bostic Exp $-->
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<title>Berkeley DB: DbEnv::log_flush</title>
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<h3>DbEnv::log_flush</h3>
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<h3><pre>
#include <db_cxx.h>
<p>
int
DbEnv::log_flush(const DbLsn *lsn);
</pre></h3>
<hr size=1 noshade>
<h3>Description: DbEnv::log_flush</h3>
<p>The DbEnv::log_flush method writes log records to disk.</p>
<p>The DbEnv::log_flush method
either returns a non-zero error value
or throws an exception that encapsulates a non-zero error value on
failure, and returns 0 on success.
</p>
<h3>Parameters</h3>
<dl compact>
<dt><b>lsn</b><dd>All log records with <a href="../api_cxx/lsn_class.html">DbLsn</a> values less than or equal to the
<b>lsn</b> parameter are written to disk. If <b>lsn</b> is NULL,
all records in the log are flushed.
</dl>
<h3>Errors</h3>
<p>The DbEnv::log_flush method
may fail and throw
<a href="../api_cxx/except_class.html">DbException</a>,
encapsulating one of the following non-zero errors, or return one of
the following non-zero errors:</p>
<dl compact>
<dt>EINVAL<dd>An
invalid flag value or parameter was specified.
</dl>
<hr size=1 noshade>
<h3>Class</h3>
<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>
<h3>See Also</h3>
<a href="../api_cxx/log_list.html">Logging Subsystem and Related Methods</a>
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