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<h1>DbEnv::memp_fcreate</h1>
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<h3><pre>
#include <db_cxx.h>
<p>
int
DbEnv::memp_fcreate(DbMpoolFile **dbmfp, u_int32_t flags);
</pre></h3>
<h1>Description</h1>
<p>The DbEnv::memp_fcreate method creates a <a href="../api_cxx/mempfile_class.html">DbMpoolFile</a> structure that
is the handle for a Berkeley DB shared memory buffer pool file. A pointer to
this structure is returned in the memory to which <b>dbmfp</b> refers.
Calling the <a href="../api_cxx/memp_fclose.html">DbMpoolFile::close</a> method will discard the returned handle.
<p>The <b>flags</b> parameter is currently unused, and must be set to 0.
<p>The DbEnv::memp_fcreate 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.
<h1>Errors</h1>
<p>The DbEnv::memp_fcreate method may fail and throw an exception or return a non-zero error for errors specified for other Berkeley DB and C library or system methods.
If a catastrophic error has occurred, the DbEnv::memp_fcreate method may fail and
either return <a href="../ref/program/errorret.html#DB_RUNRECOVERY">DB_RUNRECOVERY</a> or throw a
<a href="../api_cxx/runrec_class.html">DbRunRecoveryException</a>,
in which case all subsequent Berkeley DB calls will fail in the same way.
<h1>Class</h1>
<a href="../api_cxx/env_class.html">DbEnv</a>, <a href="../api_cxx/mempfile_class.html">DbMpoolFile</a>
<h1>See Also</h1>
<a href="../api_cxx/memp_list.html">Memory Pools and Related Methods</a>
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