mirror of
https://github.com/berkeleydb/libdb.git
synced 2024-11-17 01:26:25 +00:00
206 lines
8.3 KiB
HTML
206 lines
8.3 KiB
HTML
<?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>DbEnv::set_lk_conflicts()</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="lock.html" title="Chapter 7. The DbLock Handle" />
|
||
<link rel="prev" href="envget_lk_tablesize.html" title="DbEnv::get_lk_tablesize()" />
|
||
<link rel="next" href="envset_lk_detect.html" title="DbEnv::set_lk_detect()" />
|
||
</head>
|
||
<body>
|
||
<div xmlns="" class="navheader">
|
||
<div class="libver">
|
||
<p>Library Version 11.2.5.2</p>
|
||
</div>
|
||
<table width="100%" summary="Navigation header">
|
||
<tr>
|
||
<th colspan="3" align="center">DbEnv::set_lk_conflicts()</th>
|
||
</tr>
|
||
<tr>
|
||
<td width="20%" align="left"><a accesskey="p" href="envget_lk_tablesize.html">Prev</a> </td>
|
||
<th width="60%" align="center">Chapter 7.
|
||
The DbLock Handle
|
||
</th>
|
||
<td width="20%" align="right"> <a accesskey="n" href="envset_lk_detect.html">Next</a></td>
|
||
</tr>
|
||
</table>
|
||
<hr />
|
||
</div>
|
||
<div class="sect1" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h2 class="title" style="clear: both"><a id="envset_lk_conflicts"></a>DbEnv::set_lk_conflicts()</h2>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<pre class="programlisting">#include <db_cxx.h>
|
||
|
||
int
|
||
DbEnv::set_lk_conflicts(u_int8_t *conflicts, int nmodes); </pre>
|
||
<p>
|
||
Set the locking conflicts matrix.
|
||
</p>
|
||
<p>
|
||
If <code class="methodname">DbEnv::set_lk_conflicts()</code> is never called, a standard conflicts
|
||
array is used; see <a href="../../programmer_reference/lock_stdmode.html" class="olink">Standard Lock Modes</a> for more information.
|
||
</p>
|
||
<p>
|
||
The <code class="methodname">DbEnv::set_lk_conflicts()</code> method configures a database
|
||
environment, not only operations performed using the specified
|
||
<a class="link" href="env.html" title="Chapter 5. The DbEnv Handle">DbEnv</a> handle.
|
||
</p>
|
||
<p>
|
||
The <code class="methodname">DbEnv::set_lk_conflicts()</code> method may not be called after the
|
||
<a class="xref" href="envopen.html" title="DbEnv::open()">DbEnv::open()</a> method is
|
||
called. If the database environment already exists when
|
||
<a class="xref" href="envopen.html" title="DbEnv::open()">DbEnv::open()</a> is called, the
|
||
information specified to <code class="methodname">DbEnv::set_lk_conflicts()</code> will be ignored.
|
||
</p>
|
||
<p>
|
||
The <code class="methodname">DbEnv::set_lk_conflicts()</code> <span>
|
||
|
||
<span>
|
||
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.
|
||
</span>
|
||
</span>
|
||
</p>
|
||
<div class="sect2" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h3 class="title"><a id="id3612042"></a>Parameters</h3>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<div class="sect3" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h4 class="title"><a id="id3612031"></a>conflicts</h4>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<p>
|
||
The <span class="bold"><strong>conflicts</strong></span> parameter is the new
|
||
locking conflicts matrix. The <span class="bold"><strong>conflicts</strong></span>
|
||
parameter is an <span class="bold"><strong>nmodes</strong></span> by
|
||
<span class="bold"><strong>nmodes</strong></span> array. A non-0 value for the array
|
||
element indicates that requested_mode and held_mode conflict:
|
||
</p>
|
||
<pre class="programlisting"> conflicts[requested_mode][held_mode] </pre>
|
||
<p>
|
||
The <span class="emphasis"><em>not-granted</em></span> mode must be represented by 0.
|
||
</p>
|
||
</div>
|
||
<div class="sect3" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h4 class="title"><a id="id3611407"></a>nmodes</h4>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<p>
|
||
The <span class="bold"><strong>nmodes</strong></span> parameter is the size of
|
||
the lock conflicts matrix.
|
||
</p>
|
||
</div>
|
||
</div>
|
||
<div class="sect2" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h3 class="title"><a id="id3612061"></a>Errors</h3>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<p>
|
||
The <code class="methodname">DbEnv::set_lk_conflicts()</code> <span>
|
||
|
||
<span>
|
||
method may fail and throw a <a class="link" href="dbexception.html" title="Chapter 6. The DbException Class">DbException</a>
|
||
exception, encapsulating one of the following non-zero errors, or return one
|
||
of the following non-zero errors:
|
||
</span>
|
||
</span>
|
||
</p>
|
||
<div class="sect3" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h4 class="title"><a id="id3612227"></a>EINVAL</h4>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<p>
|
||
If the method was called after <a class="xref" href="envopen.html" title="DbEnv::open()">DbEnv::open()</a>
|
||
was called; or if an invalid flag value or parameter was specified.
|
||
</p>
|
||
</div>
|
||
<div class="sect3" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h4 class="title"><a id="id3612214"></a>ENOMEM</h4>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<p>
|
||
The conflicts array could not be copied.
|
||
</p>
|
||
</div>
|
||
</div>
|
||
<div class="sect2" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h3 class="title"><a id="id3612155"></a>Class</h3>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<p>
|
||
<a class="link" href="env.html" title="Chapter 5. The DbEnv Handle">DbEnv</a>,
|
||
<a class="link" href="lock.html" title="Chapter 7. The DbLock Handle">DbLock</a>
|
||
</p>
|
||
</div>
|
||
<div class="sect2" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h3 class="title"><a id="id3612067"></a>See Also</h3>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<p>
|
||
<a class="xref" href="lock.html#locklist" title="Locking Subsystem and Related Methods">Locking Subsystem and Related Methods</a>
|
||
</p>
|
||
</div>
|
||
</div>
|
||
<div class="navfooter">
|
||
<hr />
|
||
<table width="100%" summary="Navigation footer">
|
||
<tr>
|
||
<td width="40%" align="left"><a accesskey="p" href="envget_lk_tablesize.html">Prev</a> </td>
|
||
<td width="20%" align="center">
|
||
<a accesskey="u" href="lock.html">Up</a>
|
||
</td>
|
||
<td width="40%" align="right"> <a accesskey="n" href="envset_lk_detect.html">Next</a></td>
|
||
</tr>
|
||
<tr>
|
||
<td width="40%" align="left" valign="top">DbEnv::get_lk_tablesize() </td>
|
||
<td width="20%" align="center">
|
||
<a accesskey="h" href="index.html">Home</a>
|
||
</td>
|
||
<td width="40%" align="right" valign="top"> DbEnv::set_lk_detect()</td>
|
||
</tr>
|
||
</table>
|
||
</div>
|
||
</body>
|
||
</html>
|