2011-09-13 17:44:24 +00:00
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<title>DbEnv::set_lk_priority()</title>
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<link rel="up" href="lock.html" title="Chapter 7. The DbLock Handle" />
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<link rel="prev" href="envset_lk_partitions.html" title="DbEnv::set_lk_partitions()" />
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<p>Library Version 11.2.5.2</p>
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<table width="100%" summary="Navigation header">
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<th colspan="3" align="center">DbEnv::set_lk_priority()</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="envset_lk_partitions.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 7.
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The DbLock Handle
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</th>
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<td width="20%" align="right"> <a accesskey="n" href="envset_lk_tablesize.html">Next</a></td>
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<div class="sect1" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h2 class="title" style="clear: both"><a id="envset_lk_priority"></a>DbEnv::set_lk_priority()</h2>
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</div>
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<pre class="programlisting">#include <db_cxx.h>
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int
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DbEnv::set_lk_priority(u_int32_t u_int32_t lockerid, u_int32_t priority); </pre>
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<p>
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Set the priority of the given locker. This value is used when
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resolving deadlocks, the deadlock resolution algorithm will reject
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a lock request from a locker with a lower priority before a request
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from a locker with a higher priority.
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</p>
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<p>
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By default, all lockers are created with a priority of 100.
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</p>
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<p>
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The <code class="methodname">DbEnv::set_lk_priority()</code> method may be
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called at any time during the life of the application.
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</p>
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<p>
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The <code class="methodname">DbEnv::set_lk_priority()</code> <span>
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<span>
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method either returns a non-zero error value or throws an
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exception that encapsulates a non-zero error value on
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failure, and returns 0 on success.
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</span>
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</span>
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</p>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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2011-12-20 00:07:10 +00:00
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<h3 class="title"><a id="id3613778"></a>Parameters</h3>
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2011-09-13 17:44:24 +00:00
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</div>
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</div>
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</div>
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<div class="sect3" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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2011-12-20 00:07:10 +00:00
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<h4 class="title"><a id="id3613768"></a>lockerid</h4>
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2011-09-13 17:44:24 +00:00
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</div>
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</div>
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</div>
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<p>
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The <span class="bold"><strong>lockerid</strong></span> parameter
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represents a locker returned by
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<code class="methodname">DbEnv::lock_id()</code>.
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</p>
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</div>
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<div class="sect3" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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2011-12-20 00:07:10 +00:00
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<h4 class="title"><a id="id3613417"></a>priority</h4>
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2011-09-13 17:44:24 +00:00
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</div>
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</div>
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</div>
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<p>
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The <span class="bold"><strong>priority</strong></span> parameter
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must be a value between 0 and 2^32-1.
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</p>
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</div>
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</div>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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2011-12-20 00:07:10 +00:00
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<h3 class="title"><a id="id3613607"></a>Errors</h3>
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2011-09-13 17:44:24 +00:00
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</div>
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</div>
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</div>
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<p>
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The <code class="methodname">DbEnv::set_lk_priority()</code> <span>
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<span>
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method may fail and throw a <a class="link" href="dbexception.html" title="Chapter 6. The DbException Class">DbException</a>
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exception, encapsulating one of the following non-zero errors, or return one
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of the following non-zero errors:
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</span>
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</span>
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</p>
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<div class="sect3" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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2011-12-20 00:07:10 +00:00
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<h4 class="title"><a id="id3613893"></a>EINVAL</h4>
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2011-09-13 17:44:24 +00:00
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</div>
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</div>
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</div>
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<p>
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An invalid flag value or parameter was specified.
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</p>
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</div>
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</div>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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2011-12-20 00:07:10 +00:00
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<h3 class="title"><a id="id3613864"></a>Class</h3>
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2011-09-13 17:44:24 +00:00
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</div>
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</div>
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</div>
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<p>
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<a class="link" href="env.html" title="Chapter 5. The DbEnv Handle">DbEnv</a>,
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<a class="link" href="lock.html" title="Chapter 7. The DbLock Handle">DbLock</a>
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</p>
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</div>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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2011-12-20 00:07:10 +00:00
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<h3 class="title"><a id="id3613635"></a>See Also</h3>
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2011-09-13 17:44:24 +00:00
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</div>
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</div>
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</div>
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<p>
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<a class="xref" href="lock.html#locklist" title="Locking Subsystem and Related Methods">Locking Subsystem and Related Methods</a>
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</p>
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<td width="40%" align="right"> <a accesskey="n" href="envset_lk_tablesize.html">Next</a></td>
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<td width="40%" align="left" valign="top">DbEnv::set_lk_partitions() </td>
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<td width="20%" align="center">
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<a accesskey="h" href="index.html">Home</a>
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<td width="40%" align="right" valign="top"> DbEnv::set_lk_tablesize()</td>
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