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<h2 class="title" style="clear: both"><a id="envget_memory_init"></a>DbEnv::get_memory_init()</h2>
</div>
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</div>
<pre class="programlisting">#include <db_cxx.h>
int
DbEnv::get_memory_init(DB_MEM_CONFIG type, u_int32_t *countp);</pre>
<p>
The <code class="methodname">DbEnv::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="DbEnv::set_memory_init()">DbEnv::set_memory_init()</a>
method.
</p>
<p>
The <code class="methodname">DbEnv::get_memory_init()</code> method may be
called at any time during the life of the application.
</p>
<p>
The <code class="methodname">DbEnv::get_memory_init()</code> <span>
<span>
method either returns a non-zero error value or throws an
exception that encapsulates a non-zero error value on
failure, and returns 0 on success.
</span>
</span>
</p>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
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<h3 class="title"><a id="idp6874256"></a>Parameters</h3>
</div>
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<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="idp6873608"></a>type</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="DbEnv::failchk()">DbEnv::failchk()</a>.
</p>
</li>
</ul>
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<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="idp6887960"></a>countp</h4>
</div>
</div>
</div>
<p>
The <span class="bold"><strong>countp</strong></span> parameter references
memory into which the object count for the specified
structure is copied.
</p>
</div>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
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<h3 class="title"><a id="idp6877816"></a>Class</h3>
</div>
</div>
</div>
<p>
<a class="link" href="env.html" title="Chapter 5. The DbEnv Handle">DbEnv</a>
</p>
</div>
<div class="sect2" lang="en" xml:lang="en">
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<div>
<h3 class="title"><a id="idp6890248"></a>See Also</h3>
</div>
</div>
</div>
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<a class="xref" href="env.html#envlist" title="Database Environments and Related Methods">Database Environments and Related Methods</a>
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