53 lines
2.4 KiB
HTML
53 lines
2.4 KiB
HTML
<!--$Id: memp_class.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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<!--See the file LICENSE for redistribution information.-->
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<html>
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<head>
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<title>Berkeley DB: DbMemoryException</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>DbMemoryException</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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class DbMemoryException : public DbException {
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public:
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Dbt *get_dbt() const;
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};
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</pre></b>
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<hr size=1 noshade>
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<b>Description: DbMemoryException</b>
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<p>This information describes the DbMemoryException class and how
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it is used by the various Db* classes.</p>
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<p>A DbMemoryException is thrown when there is insufficient memory
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to complete an operation, and there is the possibility of recovering.
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An example is during a <a href="../api_cxx/db_get.html">Db::get</a> or <a href="../api_cxx/dbc_get.html">Dbc::get</a> operation with
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the <a href="../api_cxx/dbt_class.html">Dbt</a> flags set to <a href="../api_cxx/dbt_class.html#DB_DBT_USERMEM">DB_DBT_USERMEM</a>.</p>
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<a name="2"><!--meow--></a>
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<p>The <a href="../api_cxx/except_class.html">DbException</a> errno value is set to <a href="../api_cxx/dbt_class.html#DB_BUFFER_SMALL">DB_BUFFER_SMALL</a>
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or ENOMEM.</p>
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<p>The <b>get_dbt</b> method returns the <a href="../api_cxx/dbt_class.html">Dbt</a> with insufficient
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memory to complete the operation, causing the DbMemoryException
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to be thrown.
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The <a href="../api_cxx/dbt_class.html">Dbt</a> pointer may or may not refer to valid memory, depending
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on whether the <a href="../api_cxx/dbt_class.html">Dbt</a> used in the call to the failed Berkeley DB method
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is still in scope and has not been deleted.</p>
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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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</body>
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</html>
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