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Release 5.2.28 on 6/10/2011
2011-09-13 17:44:24 +00:00
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<title>DB_ENV-&gt;set_lk_conflicts()</title>
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<p>Library Version 11.2.5.2</p>
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<th colspan="3" align="center">DB_ENV-&gt;set_lk_conflicts()</th>
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<tr>
<td width="20%" align="left"><a accesskey="p" href="envget_lk_tablesize.html">Prev</a> </td>
<th width="60%" align="center">Chapter 6. 
The DB_LOCK Handle
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<td width="20%" align="right"> <a accesskey="n" href="envset_lk_detect.html">Next</a></td>
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<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>DB_ENV-&gt;set_lk_conflicts()</h2>
</div>
</div>
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<pre class="programlisting">#include &lt;db.h&gt;
int
DB_ENV-&gt;set_lk_conflicts(DB_ENV *dbenv,
u_int8_t *conflicts, int nmodes); </pre>
<p>
Set the locking conflicts matrix.
</p>
<p>
If <code class="methodname">DB_ENV-&gt;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">DB_ENV-&gt;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 DB_ENV Handle">DB_ENV</a> handle.
</p>
<p>
The <code class="methodname">DB_ENV-&gt;set_lk_conflicts()</code> method may not be called after the
<a class="xref" href="envopen.html" title="DB_ENV-&gt;open()">DB_ENV-&gt;open()</a> method is
called. If the database environment already exists when
<a class="xref" href="envopen.html" title="DB_ENV-&gt;open()">DB_ENV-&gt;open()</a> is called, the
information specified to <code class="methodname">DB_ENV-&gt;set_lk_conflicts()</code> will be ignored.
</p>
<p>
The <code class="methodname">DB_ENV-&gt;set_lk_conflicts()</code> <span>
<span>
method returns a non-zero error value on failure and 0 on success.
</span>
</span>
</p>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
Release 5.2.36 on 9/14/2022
2011-12-20 00:07:10 +00:00
<h3 class="title"><a id="id3721318"></a>Parameters</h3>
Release 5.2.28 on 6/10/2011
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</div>
</div>
</div>
<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
Release 5.2.36 on 9/14/2022
2011-12-20 00:07:10 +00:00
<h4 class="title"><a id="id3721307"></a>conflicts</h4>
Release 5.2.28 on 6/10/2011
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</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>
Release 5.2.36 on 9/14/2022
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<h4 class="title"><a id="id3721366"></a>nmodes</h4>
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</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>
Release 5.2.36 on 9/14/2022
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<h3 class="title"><a id="id3721012"></a>Errors</h3>
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</div>
</div>
</div>
<p>
The <code class="methodname">DB_ENV-&gt;set_lk_conflicts()</code> <span>
<span>
method may fail and return one of the following non-zero errors:
</span>
</span>
</p>
<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
Release 5.2.36 on 9/14/2022
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<h4 class="title"><a id="id3721304"></a>EINVAL</h4>
Release 5.2.28 on 6/10/2011
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</div>
</div>
</div>
<p>
If the method was called after <a class="xref" href="envopen.html" title="DB_ENV-&gt;open()">DB_ENV-&gt;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>
Release 5.2.36 on 9/14/2022
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<h4 class="title"><a id="id3721013"></a>ENOMEM</h4>
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</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>
Release 5.2.36 on 9/14/2022
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<h3 class="title"><a id="id3721496"></a>Class</h3>
Release 5.2.28 on 6/10/2011
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</div>
</div>
</div>
<p>
<a class="link" href="env.html" title="Chapter 5.  The DB_ENV Handle">DB_ENV</a>,
<a class="link" href="lock.html" title="Chapter 6.  The DB_LOCK Handle">DB_LOCK</a>
</p>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
Release 5.2.36 on 9/14/2022
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<h3 class="title"><a id="id3721497"></a>See Also</h3>
Release 5.2.28 on 6/10/2011
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</div>
</div>
</div>
<p>
<a class="xref" href="lock.html#locklist" title="Locking Subsystem and Related Methods">Locking Subsystem and Related Methods</a>
</p>
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<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">DB_ENV-&gt;get_lk_tablesize() </td>
<td width="20%" align="center">
<a accesskey="h" href="index.html">Home</a>
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<td width="40%" align="right" valign="top"> DB_ENV-&gt;set_lk_detect()</td>
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