1<?xml version="1.0" encoding="UTF-8" standalone="no"?> 2<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 3<html xmlns="http://www.w3.org/1999/xhtml"> 4 <head> 5 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> 6 <title>DbDeadlockException</title> 7 <link rel="stylesheet" href="apiReference.css" type="text/css" /> 8 <meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /> 9 <link rel="start" href="index.html" title="Berkeley DB C++ API Reference" /> 10 <link rel="up" href="dbexception.html" title="Chapter 6. The DbException Class" /> 11 <link rel="prev" href="dbexception.html" title="Chapter 6. The DbException Class" /> 12 <link rel="next" href="dblocknotgranted.html" title="DbLockNotGrantedException" /> 13 </head> 14 <body> 15 <div class="navheader"> 16 <table width="100%" summary="Navigation header"> 17 <tr> 18 <th colspan="3" align="center">DbDeadlockException</th> 19 </tr> 20 <tr> 21 <td width="20%" align="left"><a accesskey="p" href="dbexception.html">Prev</a> </td> 22 <th width="60%" align="center">Chapter 6. The DbException Class</th> 23 <td width="20%" align="right"> <a accesskey="n" href="dblocknotgranted.html">Next</a></td> 24 </tr> 25 </table> 26 <hr /> 27 </div> 28 <div class="sect1" lang="en" xml:lang="en"> 29 <div class="titlepage"> 30 <div> 31 <div> 32 <h2 class="title" style="clear: both"><a id="dbdeadlock"></a>DbDeadlockException</h2> 33 </div> 34 </div> 35 </div> 36 <pre class="programlisting">#include <db_cxx.h> 37 38class DbDeadlockException : public DbException { ... }; </pre> 39 <p> 40 This information describes the <code class="classname">DbDeadlockException</code> class and how 41 it is used by the various Berkeley DB classes. 42 </p> 43 <p> 44 A <code class="classname">DbDeadlockException</code> is thrown when multiple threads competing for a 45 lock are deadlocked, when a lock request has timed out (and 46 <a class="link" href="envset_flags.html#envset_flags_DB_TIME_NOTGRANTED">DB_TIME_NOTGRANTED</a> 47 has not been set in the environment), or when a lock 48 request would need to block and the transaction has been configured to not wait for locks. 49 One of the threads' transactions is selected for termination, and a 50 <code class="classname">DbDeadlockException</code> is thrown to that thread. 51 52 53 54 </p> 55 <p> 56 The <a class="link" href="dbexception.html" title="Chapter 6. The DbException Class">DbException</a> errno value is set to 57 <code class="literal">DB_LOCK_DEADLOCK</code>. 58 </p> 59 </div> 60 <div class="navfooter"> 61 <hr /> 62 <table width="100%" summary="Navigation footer"> 63 <tr> 64 <td width="40%" align="left"><a accesskey="p" href="dbexception.html">Prev</a> </td> 65 <td width="20%" align="center"> 66 <a accesskey="u" href="dbexception.html">Up</a> 67 </td> 68 <td width="40%" align="right"> <a accesskey="n" href="dblocknotgranted.html">Next</a></td> 69 </tr> 70 <tr> 71 <td width="40%" align="left" valign="top">Chapter 6. The DbException Class </td> 72 <td width="20%" align="center"> 73 <a accesskey="h" href="index.html">Home</a> 74 </td> 75 <td width="40%" align="right" valign="top"> DbLockNotGrantedException</td> 76 </tr> 77 </table> 78 </div> 79 </body> 80</html> 81