<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Chapter 6. The DB_LOCK Handle</title>
<link rel="stylesheet" href="apiReference.css" type="text/css" />
<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
<link rel="start" href="index.html" title="Berkeley DB C API Reference" />
<link rel="up" href="index.html" title="Berkeley DB C API Reference" />
<link rel="prev" href="envversion.html" title="db_version" />
<link rel="next" href="envget_lk_conflicts.html" title="DB_ENV->get_lk_conflicts()" />
</head>
<body>
<div class="navheader">
<table width="100%" summary="Navigation header">
<tr>
<th colspan="3" align="center">Chapter 6.
The DB_LOCK Handle
</th>
</tr>
<tr>
<td width="20%" align="left"><a accesskey="p" href="envversion.html">Prev</a> </td>
<th width="60%" align="center"> </th>
<td width="20%" align="right"> <a accesskey="n" href="envget_lk_conflicts.html">Next</a></td>
</tr>
</table>
<hr />
</div>
<div class="chapter" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h2 class="title"><a id="lock"></a>Chapter 6.
The DB_LOCK Handle
</h2>
</div>
</div>
</div>
<pre class="programlisting">#include <db.h>
typedef struct __db_lock_u DB_LOCK; </pre>
<p>
The locking interfaces for the Berkeley DB database environment
are methods of the <a class="link" href="env.html" title="Chapter 5. The DB_ENV Handle">DB_ENV</a>
handle. The <code class="classname">DB_LOCK</code> object is
the handle for a single lock, and has no methods of its own.
</p>
<div class="sect1" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h2 class="title" style="clear: both"><a id="locklist"></a>Locking Subsystem and Related Methods</h2>
</div>
</div>
</div>
<div class="navtable">
<table border="1" width="80%">
<thead>
<tr>
<th>Locking Subsystem and Related Methods</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td>
<a class="xref" href="lockdetect.html" title="DB_ENV->lock_detect()">DB_ENV->lock_detect()</a>
</td>
<td>Perform deadlock detection</td>
</tr>
<tr>
<td>
<a class="xref" href="lockget.html" title="DB_ENV->lock_get()">DB_ENV->lock_get()</a>
</td>
<td>Acquire a lock</td>
</tr>
<tr>
<td>
<a class="xref" href="lockid.html" title="DB_ENV->lock_id()">DB_ENV->lock_id()</a>
</td>
<td>Acquire a locker ID</td>
</tr>
<tr>
<td>
<a class="xref" href="lockid_free.html" title="DB_ENV->lock_id_free()">DB_ENV->lock_id_free()</a>
</td>
<td>Release a locker ID</td>
</tr>
<tr>
<td>
<a class="xref" href="lockput.html" title="DB_ENV->lock_put()">DB_ENV->lock_put()</a>
</td>
<td>Release a lock</td>
</tr>
<tr>
<td>
<a class="xref" href="lockstat.html" title="DB_ENV->lock_stat()">DB_ENV->lock_stat()</a>
</td>
<td>Return lock subsystem statistics</td>
</tr>
<tr>
<td>
<a class="xref" href="lockstat_print.html" title="DB_ENV->lock_stat_print()">DB_ENV->lock_stat_print()</a>
</td>
<td>Print lock subsystem statistics</td>
</tr>
<tr>
<td>
<a class="xref" href="lockvec.html" title="DB_ENV->lock_vec()">DB_ENV->lock_vec()</a>
</td>
<td>Acquire/release locks</td>
</tr>
<tr>
<td>
<a class="xref" href="envcdsgroup_begin.html" title="DB_ENV->cdsgroup_begin()">DB_ENV->cdsgroup_begin()</a>
</td>
<td>Get a locker ID in Berkeley DB Concurrent Data Store</td>
</tr>
<tr>
<td colspan="2">
<span class="bold">
<strong>Locking Subsystem Configuration</strong>
</span>
</td>
</tr>
<tr>
<td><a class="xref" href="envset_timeout.html" title="DB_ENV->set_timeout()">DB_ENV->set_timeout()</a>, <a class="xref" href="envget_timeout.html" title="DB_ENV->get_timeout()">DB_ENV->get_timeout()</a></td>
<td>Set/get lock and transaction timeout</td>
</tr>
<tr>
<td><a class="xref" href="envset_lk_conflicts.html" title="DB_ENV->set_lk_conflicts()">DB_ENV->set_lk_conflicts()</a>, <a class="xref" href="envget_lk_conflicts.html" title="DB_ENV->get_lk_conflicts()">DB_ENV->get_lk_conflicts()</a></td>
<td>Set/get lock conflicts matrix</td>
</tr>
<tr>
<td><a class="xref" href="envset_lk_detect.html" title="DB_ENV->set_lk_detect()">DB_ENV->set_lk_detect()</a>, <a class="xref" href="envget_lk_detect.html" title="DB_ENV->get_lk_detect()">DB_ENV->get_lk_detect()</a></td>
<td>Set/get automatic deadlock detection</td>
</tr>
<tr>
<td><a class="xref" href="envset_lk_max_lockers.html" title="DB_ENV->set_lk_max_lockers()">DB_ENV->set_lk_max_lockers()</a>, <a class="xref" href="envget_lk_max_lockers.html" title="DB_ENV->get_lk_max_lockers()">DB_ENV->get_lk_max_lockers()</a></td>
<td>Set/get maximum number of lockers</td>
</tr>
<tr>
<td><a class="xref" href="envset_lk_max_locks.html" title="DB_ENV->set_lk_max_locks()">DB_ENV->set_lk_max_locks()</a>, <a class="xref" href="envget_lk_max_locks.html" title="DB_ENV->get_lk_max_locks()">DB_ENV->get_lk_max_locks()</a></td>
<td>Set/get maximum number of locks</td>
</tr>
<tr>
<td><a class="xref" href="envset_lk_max_objects.html" title="DB_ENV->set_lk_max_objects()">DB_ENV->set_lk_max_objects()</a>, <a class="xref" href="envget_lk_max_objects.html" title="DB_ENV->get_lk_max_objects()">DB_ENV->get_lk_max_objects()</a></td>
<td>Set/get maximum number of lock objects</td>
</tr>
<tr>
<td><a class="xref" href="envset_lk_partitions.html" title="DB_ENV->set_lk_partitions()">DB_ENV->set_lk_partitions()</a>, <a class="xref" href="envget_lk_partitions.html" title="DB_ENV->get_lk_partitions()">DB_ENV->get_lk_partitions()</a></td>
<td>Set/get number of lock partitions</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="navfooter">
<hr />
<table width="100%" summary="Navigation footer">
<tr>
<td width="40%" align="left"><a accesskey="p" href="envversion.html">Prev</a> </td>
<td width="20%" align="center"> </td>
<td width="40%" align="right"> <a accesskey="n" href="envget_lk_conflicts.html">Next</a></td>
</tr>
<tr>
<td width="40%" align="left" valign="top">db_version </td>
<td width="20%" align="center">
<a accesskey="h" href="index.html">Home</a>
</td>
<td width="40%" align="right" valign="top"> DB_ENV->get_lk_conflicts()</td>
</tr>
</table>
</div>
</body>
</html>
distrib
>
Mandriva
>
2010.1
>
x86_64
>
media
>
main-release
>
by-pkgid
>
a00abf5f94bf470fd4cc9e10b2d135e0
>
files
>
258
