mirror of
https://github.com/berkeleydb/libdb.git
synced 2024-11-17 01:26:25 +00:00
168 lines
8.2 KiB
HTML
168 lines
8.2 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>DbLockNotGrantedException</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="dbexception.html" title="Chapter 6. The DbException Class" />
|
||
<link rel="prev" href="dbdeadlock.html" title="DbDeadlockException" />
|
||
<link rel="next" href="dbmemory.html" title="DbMemoryException" />
|
||
</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">DbLockNotGrantedException</th>
|
||
</tr>
|
||
<tr>
|
||
<td width="20%" align="left"><a accesskey="p" href="dbdeadlock.html">Prev</a> </td>
|
||
<th width="60%" align="center">Chapter 6. The DbException Class</th>
|
||
<td width="20%" align="right"> <a accesskey="n" href="dbmemory.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="dblocknotgranted"></a>DbLockNotGrantedException</h2>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<pre class="programlisting">#include <db_cxx.h>
|
||
|
||
class DbLockNotGrantedException : public DbException {
|
||
public:
|
||
db_lockop_t get_op() const;
|
||
db_lockmode_t get_mode() const;
|
||
const Dbt* get_obj() const;
|
||
DbLock *get_lock() const;
|
||
int get_index() const;
|
||
}; </pre>
|
||
<p>
|
||
This information describes the <code class="classname">DbLockNotGrantedException</code> class and how
|
||
it is used by the various Berkeley DB classes.
|
||
</p>
|
||
<p>
|
||
A <code class="classname">DbLockNotGrantedException</code> is thrown when
|
||
lock or transaction timeouts have been configured, a database operation has timed out, and the
|
||
<a class="link" href="envset_flags.html#envset_flags_DB_TIME_NOTGRANTED">DB_TIME_NOTGRANTED</a>
|
||
configuration flag has been specified.
|
||
</p>
|
||
<p>
|
||
Additionally <code class="classname">DbLockNotGrantedException</code> is thrown when a Berkeley DB
|
||
Concurrent Data Store database environment configured for lock timeouts was unable to grant
|
||
a lock in the allowed time.
|
||
</p>
|
||
<p>
|
||
Finally, <code class="classname">DbLockNotGrantedException</code> is thrown when a lock requested using the
|
||
<a class="xref" href="lockget.html" title="DbEnv::lock_get()">DbEnv::lock_get()</a>
|
||
or
|
||
<a class="xref" href="lockvec.html" title="DbEnv::lock_vec()">DbEnv::lock_vec()</a>
|
||
methods, where the <a class="link" href="lockvec.html#vec_DB_LOCK_NOWAIT">DB_LOCK_NOWAIT</a>
|
||
flag or lock timers were configured, could not be granted before the wait-time expired.
|
||
</p>
|
||
<p>
|
||
The <a class="link" href="dbexception.html" title="Chapter 6. The DbException Class">DbException</a> errno value is set to
|
||
<code class="literal">DB_LOCK_NOTGRANTED</code>.
|
||
</p>
|
||
<p>
|
||
The following getter methods are available on this class:
|
||
</p>
|
||
<div class="itemizedlist">
|
||
<ul type="disc">
|
||
<li>
|
||
<p>
|
||
<code class="methodname">get_op()</code>
|
||
</p>
|
||
<p>
|
||
Returns <code class="literal">DB_LOCK_GET</code> when <a class="xref" href="lockget.html" title="DbEnv::lock_get()">DbEnv::lock_get()</a>
|
||
was called, and returns the <span class="bold"><strong>op</strong></span> for the failed
|
||
<code class="literal">DB_LOCKREQ</code> when <a class="xref" href="lockvec.html" title="DbEnv::lock_vec()">DbEnv::lock_vec()</a>
|
||
was called. If this exception is raised due to a database
|
||
operation, <code class="literal">DB_LOCK_GET</code> is returned.
|
||
</p>
|
||
</li>
|
||
<li>
|
||
<p>
|
||
<code class="methodname">get_mode()</code>
|
||
</p>
|
||
<p>
|
||
Returns the <span class="bold"><strong>mode</strong></span> parameter when
|
||
<a class="xref" href="lockget.html" title="DbEnv::lock_get()">DbEnv::lock_get()</a> was called, and returns the
|
||
<span class="bold"><strong>mode</strong></span> for the failed <code class="literal">DB_LOCKREQ</code>
|
||
when <a class="xref" href="lockvec.html" title="DbEnv::lock_vec()">DbEnv::lock_vec()</a> was called.
|
||
If this exception is raised due to a database operation,
|
||
<code class="literal">DB_LOCK_NG</code> is returned.
|
||
</p>
|
||
</li>
|
||
<li>
|
||
<p>
|
||
<code class="methodname">get_obj()</code>
|
||
</p>
|
||
<p>
|
||
Returns the <span class="bold"><strong>object</strong></span> parameter when
|
||
<a class="xref" href="lockget.html" title="DbEnv::lock_get()">DbEnv::lock_get()</a> was called, and returns the
|
||
<span class="bold"><strong>object</strong></span> for the failed <code class="literal">DB_LOCKREQ</code>
|
||
when <a class="xref" href="lockvec.html" title="DbEnv::lock_vec()">DbEnv::lock_vec()</a> was called.
|
||
The <a class="link" href="dbt.html" title="Chapter 4. The Dbt Handle">Dbt</a> pointer may or may not refer valid
|
||
memory, depending on whether the <a class="link" href="dbt.html" title="Chapter 4. The Dbt Handle">Dbt</a>
|
||
used in the call to the failed <a class="xref" href="lockget.html" title="DbEnv::lock_get()">DbEnv::lock_get()</a>
|
||
or <a class="xref" href="lockvec.html" title="DbEnv::lock_vec()">DbEnv::lock_vec()</a> method is still in
|
||
scope and has not been deleted.
|
||
</p>
|
||
</li>
|
||
<li>
|
||
<p>
|
||
<code class="methodname">get_lock()</code>
|
||
</p>
|
||
<p>
|
||
Returns NULL when <a class="xref" href="lockget.html" title="DbEnv::lock_get()">DbEnv::lock_get()</a> was called,
|
||
and returns the <span class="bold"><strong>lock</strong></span> in the failed <code class="literal">DB_LOCKREQ</code>
|
||
when <a class="xref" href="lockvec.html" title="DbEnv::lock_vec()">DbEnv::lock_vec()</a> was called.
|
||
If this exception is raised due to a database operation, NULL is returned.
|
||
</p>
|
||
</li>
|
||
<li>
|
||
<p>
|
||
<code class="methodname">get_index()</code>
|
||
</p>
|
||
<p>
|
||
Returns <code class="literal">-1</code> when <a class="xref" href="lockget.html" title="DbEnv::lock_get()">DbEnv::lock_get()</a> was called,
|
||
and returns the index of the failed <code class="literal">DB_LOCKREQ</code>
|
||
when <a class="xref" href="lockvec.html" title="DbEnv::lock_vec()">DbEnv::lock_vec()</a> was called.
|
||
If this exception is raised due to a database operation,
|
||
<code class="literal">0</code> is returned.
|
||
</p>
|
||
</li>
|
||
</ul>
|
||
</div>
|
||
</div>
|
||
<div class="navfooter">
|
||
<hr />
|
||
<table width="100%" summary="Navigation footer">
|
||
<tr>
|
||
<td width="40%" align="left"><a accesskey="p" href="dbdeadlock.html">Prev</a> </td>
|
||
<td width="20%" align="center">
|
||
<a accesskey="u" href="dbexception.html">Up</a>
|
||
</td>
|
||
<td width="40%" align="right"> <a accesskey="n" href="dbmemory.html">Next</a></td>
|
||
</tr>
|
||
<tr>
|
||
<td width="40%" align="left" valign="top">DbDeadlockException </td>
|
||
<td width="20%" align="center">
|
||
<a accesskey="h" href="index.html">Home</a>
|
||
</td>
|
||
<td width="40%" align="right" valign="top"> DbMemoryException</td>
|
||
</tr>
|
||
</table>
|
||
</div>
|
||
</body>
|
||
</html>
|