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84 lines
3.6 KiB
HTML
84 lines
3.6 KiB
HTML
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>DbDeadlockException</title>
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<link rel="stylesheet" href="apiReference.css" type="text/css" />
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<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
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<link rel="start" href="index.html" title="Berkeley DB C++ API Reference" />
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<link rel="up" href="dbexception.html" title="Chapter 6. The DbException Class" />
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<link rel="prev" href="dbexception.html" title="Chapter 6. The DbException Class" />
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<link rel="next" href="dblocknotgranted.html" title="DbLockNotGrantedException" />
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</head>
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<body>
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<div xmlns="" class="navheader">
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<div class="libver">
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<p>Library Version 11.2.5.2</p>
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</div>
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center">DbDeadlockException</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="dbexception.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 6. The DbException Class</th>
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<td width="20%" align="right"> <a accesskey="n" href="dblocknotgranted.html">Next</a></td>
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</tr>
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</table>
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<hr />
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</div>
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<div class="sect1" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h2 class="title" style="clear: both"><a id="dbdeadlock"></a>DbDeadlockException</h2>
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</div>
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</div>
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</div>
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<pre class="programlisting">#include <db_cxx.h>
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class DbDeadlockException : public DbException { ... }; </pre>
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<p>
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This information describes the <code class="classname">DbDeadlockException</code> class and how
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it is used by the various Berkeley DB classes.
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</p>
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<p>
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A <code class="classname">DbDeadlockException</code> is thrown when multiple threads competing for a
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lock are deadlocked, when a lock request has timed out (and
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<a class="link" href="envset_flags.html#envset_flags_DB_TIME_NOTGRANTED">DB_TIME_NOTGRANTED</a>
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has not been set in the environment), or when a lock
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request would need to block and the transaction has been configured to not wait for locks.
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One of the threads' transactions is selected for termination, and a
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<code class="classname">DbDeadlockException</code> is thrown to that thread.
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</p>
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<p>
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The <a class="link" href="dbexception.html" title="Chapter 6. The DbException Class">DbException</a> errno value is set to
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<code class="literal">DB_LOCK_DEADLOCK</code>.
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</p>
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</div>
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<div class="navfooter">
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<hr />
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<table width="100%" summary="Navigation footer">
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<tr>
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<td width="40%" align="left"><a accesskey="p" href="dbexception.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="dbexception.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="dblocknotgranted.html">Next</a></td>
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</tr>
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<tr>
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<td width="40%" align="left" valign="top">Chapter 6. The DbException Class </td>
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<td width="20%" align="center">
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<a accesskey="h" href="index.html">Home</a>
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</td>
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<td width="40%" align="right" valign="top"> DbLockNotGrantedException</td>
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</tr>
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</table>
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</div>
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</body>
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</html>
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