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<b>DB_MPOOLFILE->put</b>
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<b><pre>
#include <db.h>
<p>
int
DB_MPOOLFILE->put(DB_MPOOLFILE *mpf,
void *pgaddr, DB_CACHE_PRIORITY priority, u_int32_t flags);
</pre></b>
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<b>Description: DB_MPOOLFILE->put</b>
<p>The DB_MPOOLFILE->put method returns a reference to a page in the cache,
setting the priority of the page as specified by the <b>priority</b>
parameter.</p>
<p>The DB_MPOOLFILE->put method
returns a non-zero error value on failure
and 0 on success.
</p>
<b>Parameters</b> <br>
<b>flags</b><ul compact><li>The <b>flags</b> parameter is currently unused, and must be set to 0.</ul>
<b>pgaddr</b><ul compact><li>The <b>pgaddr</b> parameter is the address of the page to be returned
to the cache. The <b>pgaddr</b> parameter must be a value previously
returned by the <a href="../../db4-devel-4.7.25/api_c/memp_fget.html">DB_MPOOLFILE->get</a> method.</ul>
<b>priority</b><ul compact><li>Set the page's <b>priority</b> as follows:
<br>
<b><a name="DB_PRIORITY_UNCHANGED">DB_PRIORITY_UNCHANGED</a></b><ul compact><li>The priority is unchanged.</ul>
<b><a name="DB_PRIORITY_VERY_LOW">DB_PRIORITY_VERY_LOW</a></b><ul compact><li>The lowest priority: pages are the most likely to be discarded.</ul>
<b><a name="DB_PRIORITY_LOW">DB_PRIORITY_LOW</a></b><ul compact><li>The next lowest priority.</ul>
<b><a name="DB_PRIORITY_DEFAULT">DB_PRIORITY_DEFAULT</a></b><ul compact><li>The default priority.</ul>
<b><a name="DB_PRIORITY_HIGH">DB_PRIORITY_HIGH</a></b><ul compact><li>The next highest priority.</ul>
<b><a name="DB_PRIORITY_VERY_HIGH">DB_PRIORITY_VERY_HIGH</a></b><ul compact><li>The highest priority: pages are the least likely to be discarded.</ul>
<br></ul>
<br>
<br><b>Errors</b>
<p>The DB_MPOOLFILE->put method
may fail and return one of the following non-zero errors:</p>
<br>
<b>EINVAL</b><ul compact><li>An
invalid flag value or parameter was specified.</ul>
<br>
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<br><b>Class</b>
<a href="../../db4-devel-4.7.25/api_c/env_class.html">DB_ENV</a>, <a href="../../db4-devel-4.7.25/api_c/mempfile_class.html">DB_MPOOLFILE</a>
<br><b>See Also</b>
<a href="../../db4-devel-4.7.25/api_c/memp_list.html">Memory Pools and Related Methods</a>
</tt>
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