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<title>Berkeley DB: DB_MPOOLFILE->sync</title>
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<h1>DB_MPOOLFILE->sync</h1>
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<h3><pre>
#include <db.h>
<p>
int
DB_MPOOLFILE->sync(DB_MPOOLFILE *mpf);
</pre></h3>
<h1>Description</h1>
<p>The DB_MPOOLFILE->sync method writes all pages associated with the
<a href="../api_c/mempfile_class.html">DB_MPOOLFILE</a>, which were marked as modified using
<a href="../api_c/memp_fput.html">DB_MPOOLFILE->put</a> or <a href="../api_c/memp_fset.html">DB_MPOOLFILE->set</a>, back to the source file. If
any of the modified pages are also <i>pinned</i> (that is, this or
another process currently refers to them), DB_MPOOLFILE->sync will
ignore them.
<p>The DB_MPOOLFILE->sync method returns a non-zero error value on failure and 0 on success.
<h1>Errors</h1>
<p>The DB_MPOOLFILE->sync method may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions.
If a catastrophic error has occurred, the DB_MPOOLFILE->sync method may fail and
return <a href="../ref/program/errorret.html#DB_RUNRECOVERY">DB_RUNRECOVERY</a>,
in which case all subsequent Berkeley DB calls will fail in the same way.
<h1>Class</h1>
<a href="../api_c/env_class.html">DB_ENV</a>, <a href="../api_c/mempfile_class.html">DB_MPOOLFILE</a>
<h1>See Also</h1>
<a href="../api_c/memp_list.html">Memory Pools and Related Methods</a>
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