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<!--$Id: memp_set_flags.so,v 1.18 2005/09/17 16:30:18 bostic Exp $-->
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<title>Berkeley DB: DB_MPOOLFILE->set_flags</title>
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<h3>DB_MPOOLFILE->set_flags</h3>
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<h3><pre>
#include <db.h>
<p>
int
DB_MPOOLFILE->set_flags(DB_MPOOLFILE *mpf, u_int32_t flags, int onoff)
<p>
int
DB_MPOOLFILE->get_flags(DB_MPOOLFILE *mpf, u_int32_t *flagsp);
</pre></h3>
<hr size=1 noshade>
<h3>Description: DB_MPOOLFILE->set_flags</h3>
<p>Configure a file in the cache.</p>
<p>To set the flags for a particular database, call the
DB_MPOOLFILE->set_flags method using the <a href="../api_c/mempfile_class.html">DB_MPOOLFILE</a> handle stored in
the <b>mpf</b> field of the <a href="../api_c/db_class.html">DB</a> handle.</p>
<p>The DB_MPOOLFILE->set_flags method
returns a non-zero error value on failure
and 0 on success.
</p>
<h3>Parameters</h3>
<dl compact>
<dt><b>flags</b><dd>The <b>flags</b> parameter must be set by bitwise inclusively <b>OR</b>'ing together one or more
of the following values:
<dl compact>
<dt><a name="DB_MPOOL_NOFILE">DB_MPOOL_NOFILE</a><dd>If set, no backing temporary file will be opened for in-memory
databases, even if they expand to fill the entire cache. Attempts to
create new file pages after the cache has been filled will fail.
<p>The DB_MPOOL_NOFILE flag configures a file in the memory pool, not only
operations performed using the specified <a href="../api_c/mempfile_class.html">DB_MPOOLFILE</a> handle.</p>
<p>The DB_MPOOL_NOFILE flag may be used to configure Berkeley DB at any time during
the life of the application.</p>
<dt><a name="DB_MPOOL_UNLINK">DB_MPOOL_UNLINK</a><dd>If set, remove the file when the last reference to it is closed.
<p>The DB_MPOOL_NOFILE flag configures a file in the memory pool, not only
operations performed using the specified <a href="../api_c/mempfile_class.html">DB_MPOOLFILE</a> handle.</p>
<p>The DB_MPOOL_UNLINK flag may be used to configure Berkeley DB at any time during
the life of the application.</p>
</dl>
<dt><b>onoff</b><dd>If <b>onoff</b> is
zero,
the specified flags are cleared; otherwise they are set.
</dl>
<hr size=1 noshade>
<h3>Description: DB_MPOOLFILE->get_flags</h3>
<p>The DB_MPOOLFILE->get_flags method returns the flags.</p>
<p>The DB_MPOOLFILE->get_flags method may be called at any time during the life of the
application.</p>
<p>The DB_MPOOLFILE->get_flags method
returns a non-zero error value on failure
and 0 on success.
</p>
<h3>Parameters</h3>
<dl compact>
<dt><b>flagsp</b><dd>The DB_MPOOLFILE->get_flags method returns the
flags in <b>flagsp</b>.
</dl>
<hr size=1 noshade>
<h3>Class</h3>
<a href="../api_c/env_class.html">DB_ENV</a>, <a href="../api_c/mempfile_class.html">DB_MPOOLFILE</a>
<h3>See Also</h3>
<a href="../api_c/memp_list.html">Memory Pools and Related Methods</a>
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