1<!--$Id: memp_set_flags.so,v 1.19 2007/06/07 15:30:46 bostic Exp $--> 2<!--Copyright (c) 1997,2008 Oracle. All rights reserved.--> 3<!--See the file LICENSE for redistribution information.--> 4<html> 5<head> 6<title>Berkeley DB: DB_MPOOLFILE->set_flags</title> 7<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit."> 8<meta name="keywords" content="embedded,database,programmatic,toolkit,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++"> 9</head> 10<body bgcolor=white> 11<table width="100%"><tr valign=top> 12<td> 13<b>DB_MPOOLFILE->set_flags</b> 14</td> 15<td align=right> 16<a href="/api_c/api_core.html"><img src="/images/api.gif" alt="API"></a> 17<a href="/ref/toc.html"><img src="/images/ref.gif" alt="Ref"></a></td> 18</tr></table> 19<hr size=1 noshade> 20<tt> 21<b><pre> 22#include <db.h> 23<p> 24int 25DB_MPOOLFILE->set_flags(DB_MPOOLFILE *mpf, u_int32_t flags, int onoff) 26<p> 27int 28DB_MPOOLFILE->get_flags(DB_MPOOLFILE *mpf, u_int32_t *flagsp); 29</pre></b> 30<hr size=1 noshade> 31<b>Description: DB_MPOOLFILE->set_flags</b> 32<p>Configure a file in the cache.</p> 33<p>To set the flags for a particular database, call the 34DB_MPOOLFILE->set_flags method using the <a href="/api_c/mempfile_class.html">DB_MPOOLFILE</a> handle stored in 35the <b>mpf</b> field of the <a href="/api_c/db_class.html">DB</a> handle.</p> 36<p>The DB_MPOOLFILE->set_flags method 37returns a non-zero error value on failure 38and 0 on success. 39</p> 40<b>Parameters</b> <br> 41 <b>flags</b><ul compact><li>The <b>flags</b> parameter must be set by bitwise inclusively <b>OR</b>'ing together one or more 42of the following values: 43<br> 44<b><a name="DB_MPOOL_NOFILE">DB_MPOOL_NOFILE</a></b><ul compact><li>If set, no backing temporary file will be opened for the specified 45in-memory database, even if it expands to fill the entire cache. 46Attempts to create new database pages after the cache has been filled 47will fail. 48<p>The DB_MPOOL_NOFILE flag configures a file in the memory pool, not only 49operations performed using the specified <a href="/api_c/mempfile_class.html">DB_MPOOLFILE</a> handle.</p> 50<p>The DB_MPOOL_NOFILE flag may be used to configure Berkeley DB at any time during 51the life of the application.</p></ul> 52<b><a name="DB_MPOOL_UNLINK">DB_MPOOL_UNLINK</a></b><ul compact><li>If set, remove the file when the last reference to it is closed. 53<p>The DB_MPOOL_NOFILE flag configures a file in the memory pool, not only 54operations performed using the specified <a href="/api_c/mempfile_class.html">DB_MPOOLFILE</a> handle.</p> 55<p>The DB_MPOOL_UNLINK flag may be used to configure Berkeley DB at any time during 56the life of the application.</p></ul> 57<br></ul> 58 <b>onoff</b><ul compact><li>If <b>onoff</b> is 59zero, 60the specified flags are cleared; otherwise they are set.</ul> 61<br> 62<hr size=1 noshade> 63<b>Description: DB_MPOOLFILE->get_flags</b> 64<p>The DB_MPOOLFILE->get_flags method returns the flags.</p> 65<p>The DB_MPOOLFILE->get_flags method may be called at any time during the life of the 66application.</p> 67<p>The DB_MPOOLFILE->get_flags method 68returns a non-zero error value on failure 69and 0 on success. 70</p> 71<b>Parameters</b> <br> 72 <b>flagsp</b><ul compact><li>The DB_MPOOLFILE->get_flags method returns the 73flags in <b>flagsp</b>.</ul> 74<br> 75<hr size=1 noshade> 76<br><b>Class</b> 77<a href="/api_c/env_class.html">DB_ENV</a>, <a href="/api_c/mempfile_class.html">DB_MPOOLFILE</a> 78<br><b>See Also</b> 79<a href="/api_c/memp_list.html">Memory Pools and Related Methods</a> 80</tt> 81<table width="100%"><tr><td><br></td><td align=right> 82<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> 83</td></tr></table> 84<p><font size=1>Copyright (c) 1996,2008 Oracle. All rights reserved.</font> 85</body> 86</html> 87
