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77 lines
3.9 KiB
HTML
<!--$Id: memp_fset.so,v 10.18 2000/03/01 21:41:30 bostic Exp $-->
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<!--Copyright 1997, 1998, 1999, 2000 by Sleepycat Software, Inc.-->
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<!--All rights reserved.-->
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<html>
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<head>
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<title>Berkeley DB: DbMpoolFile::set</title>
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<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
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<meta name="keywords" content="embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,java,C,C++">
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</head>
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<body bgcolor=white>
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<a name="2"><!--meow--></a>
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<table><tr valign=top>
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<td>
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<h1>DbMpoolFile::set</h1>
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</td>
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<td width="1%">
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<a href="../api_cxx/cxx_index.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a>
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</td></tr></table>
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<hr size=1 noshade>
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<tt>
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<h3><pre>
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#include <db_cxx.h>
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<p>
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int
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DbMpoolFile::set(void *pgaddr, u_int32_t flags);
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</pre></h3>
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<h1>Description</h1>
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<p>The DbMpoolFile::set method sets the flags associated with the page referenced
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by <b>pgaddr</b> without unpinning it from the pool. The <b>pgaddr</b>
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argument must be an address previously returned by <a href="../api_cxx/memp_fget.html">DbMpoolFile::get</a>.
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<p>The <b>flags</b> value must be set to 0 or by bitwise inclusively <b>OR</b>'ing together one or more
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of the following values.
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<p><dl compact>
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<p><dt><a name="DB_MPOOL_CLEAN">DB_MPOOL_CLEAN</a><dd>Clear any previously set modification information (i.e., don't bother
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writing the page back to the source file).
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<p><dt><a name="DB_MPOOL_DIRTY">DB_MPOOL_DIRTY</a><dd>The page has been modified and must be written to the source file
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before being evicted from the pool.
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<p><dt><a name="DB_MPOOL_DISCARD">DB_MPOOL_DISCARD</a><dd>The page is unlikely to be useful in the near future,
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and should be discarded before other pages in the pool.
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</dl>
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<p>The DB_MPOOL_CLEAN and DB_MPOOL_DIRTY flags are
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mutually exclusive.
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<p>The DbMpoolFile::set method either returns a non-zero error value or throws an exception that
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encapsulates a non-zero error value on failure, and returns 0 on success.
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<h1>Errors</h1>
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<p>The DbMpoolFile::set method may fail and throw an exception or return a non-zero error for the following conditions:
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<p><dl compact>
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<p><dt>EINVAL<dd>An invalid flag value or parameter was specified.
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</dl>
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<p>The DbMpoolFile::set method may fail and throw an exception or return a non-zero error for errors specified for other Berkeley DB and C library or system methods.
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If a catastrophic error has occurred, the DbMpoolFile::set method may fail and either
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return <a href="../ref/program/errorret.html#DB_RUNRECOVERY">DB_RUNRECOVERY</a> or throw an exception encapsulating
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<a href="../ref/program/errorret.html#DB_RUNRECOVERY">DB_RUNRECOVERY</a>, in which case all subsequent Berkeley DB calls will fail
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in the same way.
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<h3>Classes</h3>
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<a href="../api_cxx/dbenv_class.html">DbEnv</a>, <a href="../api_cxx/mempfile_class.html">DbMpoolFile</a>
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<h1>See Also</h1>
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<a href="../api_cxx/env_set_mp_mmapsize.html">DbEnv::set_mp_mmapsize</a>,
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<a href="../api_cxx/memp_fclose.html">DbMpoolFile::close</a>,
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<a href="../api_cxx/memp_fget.html">DbMpoolFile::get</a>,
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<a href="../api_cxx/memp_fopen.html">DbMpoolFile::open</a>,
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<a href="../api_cxx/memp_fput.html">DbMpoolFile::put</a>,
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<a href="../api_cxx/memp_fset.html">DbMpoolFile::set</a>,
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<a href="../api_cxx/memp_fsync.html">DbMpoolFile::sync</a>,
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<a href="../api_cxx/memp_register.html">DbEnv::memp_register</a>,
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<a href="../api_cxx/memp_stat.html">DbEnv::memp_stat</a>,
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<a href="../api_cxx/memp_sync.html">DbEnv::memp_sync</a>
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and
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<a href="../api_cxx/memp_trickle.html">DbEnv::memp_trickle</a>.
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</tt>
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<table><tr><td><br></td><td width="1%">
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<a href="../api_cxx/cxx_index.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a>
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</td></tr></table>
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<p><font size=1><a href="http://www.sleepycat.com">Copyright Sleepycat Software</a></font>
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