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208 lines
9.5 KiB
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>Chapter 7. The DbLock Handle</title>
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<link rel="stylesheet" href="apiReference.css" type="text/css" />
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<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
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<link rel="prev" href="dbrunrecovery.html" title="DbRunRecoveryException" />
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<div class="libver">
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<p>Library Version 11.2.5.2</p>
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</div>
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center">Chapter 7.
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The DbLock Handle
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</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="dbrunrecovery.html">Prev</a> </td>
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<th width="60%" align="center"> </th>
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<td width="20%" align="right"> <a accesskey="n" href="envget_lk_conflicts.html">Next</a></td>
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</tr>
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</table>
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</div>
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<div class="chapter" 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"><a id="lock"></a>Chapter 7.
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The DbLock Handle
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</h2>
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</div>
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</div>
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</div>
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<pre class="programlisting">
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#include <db_cxx.h>
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class DbLock {
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public:
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DbLock();
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DbLock(const DbLock &);
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DbLock &operator = (const DbLock &);
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~DbLock();
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}; </pre>
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<p>
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The locking interfaces for the Berkeley DB database environment
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are methods of the <a class="link" href="env.html" title="Chapter 5. The DbEnv Handle">DbEnv</a>
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handle. The <code class="classname">DbLock</code> object is
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the handle for a single lock, and has no methods of its own.
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</p>
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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="locklist"></a>Locking Subsystem and Related Methods</h2>
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</div>
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</div>
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</div>
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<div class="navtable">
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<table border="1" width="80%">
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<thead>
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<tr>
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<th>Locking Subsystem and Related Methods</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>
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<a class="xref" href="dbdeadlock.html" title="DbDeadlockException">DbDeadlockException</a>
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</td>
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<td>Exception class for deadlocks</td>
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</tr>
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<tr>
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<td>
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<a class="xref" href="dblocknotgranted.html" title="DbLockNotGrantedException">DbLockNotGrantedException</a>
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</td>
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<td>Exception class for lock request failures</td>
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</tr>
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<tr>
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<td>
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<a class="xref" href="lockdetect.html" title="DbEnv::lock_detect()">DbEnv::lock_detect()</a>
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</td>
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<td>Perform deadlock detection</td>
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</tr>
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<tr>
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<td>
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<a class="xref" href="lockget.html" title="DbEnv::lock_get()">DbEnv::lock_get()</a>
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</td>
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<td>Acquire a lock</td>
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</tr>
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<tr>
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<td>
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<a class="xref" href="lockid.html" title="DbEnv::lock_id()">DbEnv::lock_id()</a>
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</td>
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<td>Acquire a locker ID</td>
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</tr>
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<tr>
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<td>
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<a class="xref" href="lockid_free.html" title="DbEnv::lock_id_free()">DbEnv::lock_id_free()</a>
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</td>
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<td>Release a locker ID</td>
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</tr>
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<tr>
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<td>
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<a class="xref" href="lockput.html" title="DbEnv::lock_put()">DbEnv::lock_put()</a>
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</td>
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<td>Release a lock</td>
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</tr>
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<tr>
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<td>
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<a class="xref" href="lockstat.html" title="DbEnv::lock_stat()">DbEnv::lock_stat()</a>
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</td>
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<td>Return lock subsystem statistics</td>
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</tr>
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<tr>
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<td>
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<a class="xref" href="lockstat_print.html" title="DbEnv::lock_stat_print()">DbEnv::lock_stat_print()</a>
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</td>
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<td>Print lock subsystem statistics</td>
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</tr>
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<tr>
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<td>
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<a class="xref" href="lockvec.html" title="DbEnv::lock_vec()">DbEnv::lock_vec()</a>
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</td>
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<td>Acquire/release locks</td>
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</tr>
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<tr>
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<td>
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<a class="xref" href="envcdsgroup_begin.html" title="DbEnv::cdsgroup_begin()">DbEnv::cdsgroup_begin()</a>
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</td>
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<td>Get a locker ID in Berkeley DB Concurrent Data Store</td>
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</tr>
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<tr>
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<td colspan="2">
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<span class="bold">
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<strong>Locking Subsystem Configuration</strong>
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</span>
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</td>
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</tr>
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<tr>
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<td><a class="xref" href="envset_timeout.html" title="DbEnv::set_timeout()">DbEnv::set_timeout()</a>, <a class="xref" href="envget_timeout.html" title="DbEnv::get_timeout()">DbEnv::get_timeout()</a></td>
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<td>Set/get lock and transaction timeout</td>
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</tr>
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<tr>
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<td><a class="xref" href="envset_lk_conflicts.html" title="DbEnv::set_lk_conflicts()">DbEnv::set_lk_conflicts()</a>, <a class="xref" href="envget_lk_conflicts.html" title="DbEnv::get_lk_conflicts()">DbEnv::get_lk_conflicts()</a></td>
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<td>Set/get lock conflicts matrix</td>
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</tr>
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<tr>
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<td><a class="xref" href="envset_lk_detect.html" title="DbEnv::set_lk_detect()">DbEnv::set_lk_detect()</a>, <a class="xref" href="envget_lk_detect.html" title="DbEnv::get_lk_detect()">DbEnv::get_lk_detect()</a></td>
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<td>Set/get automatic deadlock detection</td>
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</tr>
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<tr>
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<td><a class="xref" href="envset_lk_max_lockers.html" title="DbEnv::set_lk_max_lockers()">DbEnv::set_lk_max_lockers()</a>, <a class="xref" href="envget_lk_max_lockers.html" title="DbEnv::get_lk_max_lockers()">DbEnv::get_lk_max_lockers()</a></td>
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<td>Set/get maximum number of lockers</td>
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</tr>
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<tr>
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<td><a class="xref" href="envset_lk_max_locks.html" title="DbEnv::set_lk_max_locks()">DbEnv::set_lk_max_locks()</a>, <a class="xref" href="envget_lk_max_locks.html" title="DbEnv::get_lk_max_locks()">DbEnv::get_lk_max_locks()</a></td>
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<td>Set/get maximum number of locks</td>
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</tr>
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<tr>
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<td><a class="xref" href="envset_lk_max_objects.html" title="DbEnv::set_lk_max_objects()">DbEnv::set_lk_max_objects()</a>, <a class="xref" href="envget_lk_max_objects.html" title="DbEnv::get_lk_max_objects()">DbEnv::get_lk_max_objects()</a></td>
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<td>Set/get maximum number of lock objects</td>
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</tr>
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<tr>
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<td><a class="xref" href="envset_lk_partitions.html" title="DbEnv::set_lk_partitions()">DbEnv::set_lk_partitions()</a>, <a class="xref" href="envget_lk_partitions.html" title="DbEnv::get_lk_partitions()">DbEnv::get_lk_partitions()</a></td>
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<td>Set/get number of lock partitions</td>
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</tr>
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<tr>
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<td><a class="xref" href="envset_lk_priority.html" title="DbEnv::set_lk_priority()">DbEnv::set_lk_priority()</a>, <a class="xref" href="envget_lk_priority.html" title="DbEnv::get_lk_priority()">DbEnv::get_lk_priority()</a></td>
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<td>Set/get a locker's deadlock priority</td>
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</tr>
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<tr>
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<td><a class="xref" href="envset_lk_tablesize.html" title="DbEnv::set_lk_tablesize()">DbEnv::set_lk_tablesize()</a>, <a class="xref" href="envget_lk_tablesize.html" title="DbEnv::get_lk_tablesize()">DbEnv::get_lk_tablesize()</a></td>
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<td>Set/get size of the lock object hash table</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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</div>
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<div class="navfooter">
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<hr />
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<table width="100%" summary="Navigation footer">
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<tr>
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<td width="40%" align="left"><a accesskey="p" href="dbrunrecovery.html">Prev</a> </td>
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<td width="20%" align="center"> </td>
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<td width="40%" align="right"> <a accesskey="n" href="envget_lk_conflicts.html">Next</a></td>
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</tr>
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<tr>
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<td width="40%" align="left" valign="top">DbRunRecoveryException </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>
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<td width="40%" align="right" valign="top"> DbEnv::get_lk_conflicts()</td>
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</tr>
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</table>
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</div>
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</body>
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</html>
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