74 lines
3.3 KiB
HTML
74 lines
3.3 KiB
HTML
<!--$Id: memp_fput.html 63573 2008-05-23 21:43:21Z trent.nelson $-->
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<!--Copyright (c) 1997,2008 Oracle. All rights reserved.-->
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<html>
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<head>
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<title>Berkeley DB: DbMpoolFile::put</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,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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<table width="100%"><tr valign=top>
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<td>
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<b>DbMpoolFile::put</b>
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</td>
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<td align=right>
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<a href="../api_cxx/api_core.html"><img src="../images/api.gif" alt="API"></a>
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<a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a></td>
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</tr></table>
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<hr size=1 noshade>
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<tt>
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<b><pre>
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#include <db_cxx.h>
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<p>
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int
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DbMpoolFile::put(void *pgaddr, DB_CACHE_PRIORITY priority, u_int32_t flags);
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</pre></b>
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<hr size=1 noshade>
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<b>Description: DbMpoolFile::put</b>
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<p>The DbMpoolFile::put method returns a reference to a page in the cache,
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setting the priority of the page as specified by the <b>priority</b>
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parameter.</p>
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<p>The DbMpoolFile::put method
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either returns a non-zero error value
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or throws an exception that encapsulates a non-zero error value on
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failure, and returns 0 on success.
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</p>
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<b>Parameters</b> <br>
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<b>flags</b><ul compact><li>The <b>flags</b> parameter is currently unused, and must be set to 0.</ul>
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<b>pgaddr</b><ul compact><li>The <b>pgaddr</b> parameter is the address of the page to be returned
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to the cache. The <b>pgaddr</b> parameter must be a value previously
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returned by the <a href="../api_cxx/memp_fget.html">DbMpoolFile::get</a> method.</ul>
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<b>priority</b><ul compact><li>Set the page's <b>priority</b> as follows:
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<br>
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<b><a name="DB_PRIORITY_UNCHANGED">DB_PRIORITY_UNCHANGED</a></b><ul compact><li>The priority is unchanged.</ul>
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<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>
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<b><a name="DB_PRIORITY_LOW">DB_PRIORITY_LOW</a></b><ul compact><li>The next lowest priority.</ul>
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<b><a name="DB_PRIORITY_DEFAULT">DB_PRIORITY_DEFAULT</a></b><ul compact><li>The default priority.</ul>
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<b><a name="DB_PRIORITY_HIGH">DB_PRIORITY_HIGH</a></b><ul compact><li>The next highest priority.</ul>
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<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>
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<br></ul>
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<br>
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<br><b>Errors</b>
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<p>The DbMpoolFile::put method
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may fail and throw
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<a href="../api_cxx/except_class.html">DbException</a>,
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encapsulating one of the following non-zero errors, or return one of
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the following non-zero errors:</p>
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<br>
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<b>EINVAL</b><ul compact><li>An
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invalid flag value or parameter was specified.</ul>
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<br>
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<hr size=1 noshade>
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<br><b>Class</b>
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<a href="../api_cxx/env_class.html">DbEnv</a>, <a href="../api_cxx/mempfile_class.html">DbMpoolFile</a>
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<br><b>See Also</b>
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<a href="../api_cxx/memp_list.html">Memory Pools and Related Methods</a>
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</tt>
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<table width="100%"><tr><td><br></td><td align=right>
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<a href="../api_cxx/api_core.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>Copyright (c) 1996,2008 Oracle. All rights reserved.</font>
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