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<title>Berkeley DB: DB_ENV-&gt;memp_fcreate</title>
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<h1>DB_ENV-&gt;memp_fcreate</h1>
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#include &lt;db.h&gt;
<p>
int
DB_ENV-&gt;memp_fcreate(DB_ENV *dbenvp, DB_MPOOLFILE **dbmfp, u_int32_t flags);
</pre></h3>
<h1>Description</h1>
<p>The DB_ENV-&gt;memp_fcreate method creates a <a href="../api_c/mempfile_class.html">DB_MPOOLFILE</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_c/memp_fclose.html">DB_MPOOLFILE-&gt;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 DB_ENV-&gt;memp_fcreate method returns a non-zero error value on failure and 0 on success.
<h1>Errors</h1>
<p>The DB_ENV-&gt;memp_fcreate 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_ENV-&gt;memp_fcreate 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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