<!--$Id: memp_fput.so,v 10.35 2007/10/26 15:01:55 bostic Exp $--> <!--Copyright (c) 1997,2008 Oracle. All rights reserved.--> <!--See the file LICENSE for redistribution information.--> <html> <head> <title>Berkeley DB: DB_MPOOLFILE->put</title> <meta name="description" content="Berkeley DB: An embedded database programmatic toolkit."> <meta name="keywords" content="embedded,database,programmatic,toolkit,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++"> </head> <body bgcolor=white> <table width="100%"><tr valign=top> <td> <b>DB_MPOOLFILE->put</b> </td> <td align=right> <a href="../api_c/api_core.html"><img src="../images/api.gif" alt="API"></a> <a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a></td> </tr></table> <hr size=1 noshade> <tt> <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> <hr size=1 noshade> <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="../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> <hr size=1 noshade> <br><b>Class</b> <a href="../api_c/env_class.html">DB_ENV</a>, <a href="../api_c/mempfile_class.html">DB_MPOOLFILE</a> <br><b>See Also</b> <a href="../api_c/memp_list.html">Memory Pools and Related Methods</a> </tt> <table width="100%"><tr><td><br></td><td align=right> <a href="../api_c/api_core.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a> </td></tr></table> <p><font size=1>Copyright (c) 1996,2008 Oracle. All rights reserved.</font> </body> </html>