mirror of
https://github.com/berkeleydb/libdb.git
synced 2024-11-17 01:26:25 +00:00
219 lines
8.6 KiB
HTML
219 lines
8.6 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>DB_ENV->get_memory_init()</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="env.html" title="Chapter 5. The DB_ENV Handle" />
|
|||
|
|
<link rel="prev" href="envget_intermediate_dir_mode.html" title="DB_ENV->get_intermediate_dir_mode()" />
|
|||
|
|
<link rel="next" href="envget_memory_max.html" title="DB_ENV->get_memory_max()" />
|
|||
|
|
</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">DB_ENV->get_memory_init()</th>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td width="20%" align="left"><a accesskey="p" href="envget_intermediate_dir_mode.html">Prev</a> </td>
|
|||
|
|
<th width="60%" align="center">Chapter 5.
|
|||
|
|
The DB_ENV Handle
|
|||
|
|
</th>
|
|||
|
|
<td width="20%" align="right"> <a accesskey="n" href="envget_memory_max.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="envget_memory_init"></a>DB_ENV->get_memory_init()</h2>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<pre class="programlisting">#include <db.h>
|
|||
|
|
|
|||
|
|
int
|
|||
|
|
DB_ENV->get_memory_init(DB_ENV *dbenv, DB_MEM_CONFIG struct,
|
|||
|
|
u_int32_t *countp); </pre>
|
|||
|
|
<p>
|
|||
|
|
The <code class="methodname">DB_ENV->get_memory_init()</code> method returns
|
|||
|
|
the number of objects to allocate and initialize when an
|
|||
|
|
environment is created. The count is returned for a specific named
|
|||
|
|
structure. The count for each structure is set using the
|
|||
|
|
<a class="xref" href="envset_memory_init.html" title="DB_ENV->set_memory_init()">DB_ENV->set_memory_init()</a>
|
|||
|
|
method.
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The <code class="methodname">DB_ENV->get_memory_init()</code> method may be
|
|||
|
|
called at any time during the life of the application.
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The <code class="methodname">DB_ENV->get_memory_init()</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>
|
|||
|
|
<h3 class="title"><a id="id3887099"></a>Parameters</h3>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<div class="sect3" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h4 class="title"><a id="id3887088"></a>struct</h4>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
The <span class="bold"><strong>struct</strong></span> parameter
|
|||
|
|
identifies the structure for which you want
|
|||
|
|
an object count returned. It must be one of the following
|
|||
|
|
values:
|
|||
|
|
</p>
|
|||
|
|
<div class="itemizedlist">
|
|||
|
|
<ul type="disc">
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<code class="literal">DB_MEM_LOCK</code>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
Initialize locks. A thread uses this structure
|
|||
|
|
to lock a page (or record for the QUEUE access
|
|||
|
|
method) and hold it to the end of a transactions.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<code class="literal">DB_MEM_LOCKOBJECT</code>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
Initialize lock objects. For each page (or record) which
|
|||
|
|
is locked in the system, a lock object will be allocated.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<code class="literal">DB_MEM_LOCKER</code>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
Initialize lockers. Each thread which is active in a
|
|||
|
|
transactional environment will use a locker structure
|
|||
|
|
either for each transaction which is active, or for each
|
|||
|
|
non-transactional cursor that is active.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<code class="literal">DB_MEM_LOGID</code>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
Initialize the log fileid structures. For each database handle
|
|||
|
|
which is opened for writing in a transactional environment,
|
|||
|
|
a log fileid structure is used.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<code class="literal">DB_MEM_TRANSACTION</code>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
Initialize transaction structures. Each active
|
|||
|
|
transaction uses a transaction structure until it
|
|||
|
|
either commits or aborts.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<code class="literal">DB_MEM_THREAD</code>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
Initialize thread identification structures. If thread
|
|||
|
|
tracking is enabled then each active thread will use a
|
|||
|
|
structure. Note that since a thread does not signal the
|
|||
|
|
BDB library that it will no longer be making calls, unused
|
|||
|
|
structures may accumulate until a cleanup is triggered either
|
|||
|
|
using a high water mark or by running
|
|||
|
|
<a class="xref" href="envfailchk.html" title="DB_ENV->failchk()">DB_ENV->failchk()</a>.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
</ul>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<div class="sect3" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h4 class="title"><a id="id3887319"></a>countp</h4>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
The <span class="bold"><strong>countp</strong></span> parameter references
|
|||
|
|
memory into which object count for which the specified
|
|||
|
|
structure is copied.
|
|||
|
|
</p>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<div class="sect2" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h3 class="title"><a id="id3886911"></a>Class</h3>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
<a class="link" href="env.html" title="Chapter 5. The DB_ENV Handle">DB_ENV</a>
|
|||
|
|
</p>
|
|||
|
|
</div>
|
|||
|
|
<div class="sect2" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h3 class="title"><a id="id3887106"></a>See Also</h3>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
<a class="xref" href="env.html#envlist" title="Database Environments and Related Methods">Database Environments 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_intermediate_dir_mode.html">Prev</a> </td>
|
|||
|
|
<td width="20%" align="center">
|
|||
|
|
<a accesskey="u" href="env.html">Up</a>
|
|||
|
|
</td>
|
|||
|
|
<td width="40%" align="right"> <a accesskey="n" href="envget_memory_max.html">Next</a></td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td width="40%" align="left" valign="top">DB_ENV->get_intermediate_dir_mode() </td>
|
|||
|
|
<td width="20%" align="center">
|
|||
|
|
<a accesskey="h" href="index.html">Home</a>
|
|||
|
|
</td>
|
|||
|
|
<td width="40%" align="right" valign="top"> DB_ENV->get_memory_max()</td>
|
|||
|
|
</tr>
|
|||
|
|
</table>
|
|||
|
|
</div>
|
|||
|
|
</body>
|
|||
|
|
</html>
|