mirror of
https://github.com/MariaDB/server.git
synced 2025-11-09 11:41:36 +03:00
74 lines
3.8 KiB
HTML
74 lines
3.8 KiB
HTML
<!--$Id: lock_detect.so,v 10.26 2000/03/17 01:53:59 bostic Exp $-->
|
|
<!--Copyright 1997, 1998, 1999, 2000 by Sleepycat Software, Inc.-->
|
|
<!--All rights reserved.-->
|
|
<html>
|
|
<head>
|
|
<title>Berkeley DB: DbEnv::lock_detect</title>
|
|
<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
|
|
<meta name="keywords" content="embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,java,C,C++">
|
|
</head>
|
|
<body bgcolor=white>
|
|
<a name="2"><!--meow--></a>
|
|
<table><tr valign=top>
|
|
<td>
|
|
<h1>DbEnv::lock_detect</h1>
|
|
</td>
|
|
<td width="1%">
|
|
<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>
|
|
</td></tr></table>
|
|
<hr size=1 noshade>
|
|
<tt>
|
|
<h3><pre>
|
|
#include <db_cxx.h>
|
|
<p>
|
|
int
|
|
DbEnv::lock_detect(u_int32_t flags, u_int32_t atype, int *aborted);
|
|
</pre></h3>
|
|
<h1>Description</h1>
|
|
<p>The DbEnv::lock_detect method runs one iteration of the deadlock detector.
|
|
The deadlock detector traverses the lock table, and for each deadlock
|
|
it finds, marks one of the participating transactions for abort.
|
|
<p>The <b>flags</b> value must be set to 0 or by bitwise inclusively <b>OR</b>'ing together one or more
|
|
of the following values.
|
|
<p><dl compact>
|
|
<p><dt><a name="DB_LOCK_CONFLICT">DB_LOCK_CONFLICT</a><dd>Only run the deadlock detector if a lock conflict has occurred since
|
|
the last time that the deadlock detector was run.
|
|
</dl>
|
|
<p>The <b>atype</b> parameter specifies which transaction to abort in the
|
|
case of deadlock. It must be set to one of possible arguments listed for
|
|
the <a href="../api_cxx/env_set_lk_detect.html">DbEnv::set_lk_detect</a> interface.
|
|
<p>If the <b>aborted</b> parameter is non-NULL, the memory location it
|
|
references will be set to the number of transactions aborted by the
|
|
DbEnv::lock_detect method.
|
|
<p>The DbEnv::lock_detect method either returns a non-zero error value or throws an exception that
|
|
encapsulates a non-zero error value on failure, and returns 0 on success.
|
|
<h1>Errors</h1>
|
|
<p>The DbEnv::lock_detect 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.
|
|
If a catastrophic error has occurred, the DbEnv::lock_detect method may fail and either
|
|
return <a href="../ref/program/errorret.html#DB_RUNRECOVERY">DB_RUNRECOVERY</a> or throw an exception encapsulating
|
|
<a href="../ref/program/errorret.html#DB_RUNRECOVERY">DB_RUNRECOVERY</a>, in which case all subsequent Berkeley DB calls will fail
|
|
in the same way.
|
|
<h3>Classes</h3>
|
|
<a href="../api_cxx/dbenv_class.html">DbEnv</a>, <a href="../api_cxx/lock_class.html">DbLock</a>
|
|
<h1>See Also</h1>
|
|
<a href="../api_cxx/env_set_lk_conflicts.html">DbEnv::set_lk_conflicts</a>,
|
|
<a href="../api_cxx/env_set_lk_detect.html">DbEnv::set_lk_detect</a>,
|
|
<a href="../api_cxx/env_set_lk_max_locks.html">DbEnv::set_lk_max_locks</a>,
|
|
<a href="../api_cxx/env_set_lk_max_lockers.html">DbEnv::set_lk_max_lockers</a>,
|
|
<a href="../api_cxx/env_set_lk_max_objects.html">DbEnv::set_lk_max_objects</a>,
|
|
<a href="../api_cxx/env_set_lk_max.html">DbEnv::set_lk_max</a>,
|
|
<a href="../api_cxx/lock_detect.html">DbEnv::lock_detect</a>,
|
|
<a href="../api_cxx/lock_get.html">DbEnv::lock_get</a>,
|
|
<a href="../api_cxx/lock_id.html">DbEnv::lock_id</a>,
|
|
<a href="../api_cxx/lock_put.html">DbLock::put</a>,
|
|
<a href="../api_cxx/lock_stat.html">DbEnv::lock_stat</a>
|
|
and
|
|
<a href="../api_cxx/lock_vec.html">DbEnv::lock_vec</a>.
|
|
</tt>
|
|
<table><tr><td><br></td><td width="1%">
|
|
<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>
|
|
</td></tr></table>
|
|
<p><font size=1><a href="http://www.sleepycat.com">Copyright Sleepycat Software</a></font>
|
|
</body>
|
|
</html>
|