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134 lines
5.2 KiB
HTML
<?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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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>DbEnv::get_shm_key()</title>
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<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
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<link rel="up" href="env.html" title="Chapter 5. The DbEnv Handle" />
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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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<tr>
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<th colspan="3" align="center">DbEnv::get_shm_key()</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="envget_open_flags.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 5.
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The DbEnv Handle
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</th>
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<td width="20%" align="right"> <a accesskey="n" href="envget_thread_count.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="envget_shm_key"></a>DbEnv::get_shm_key()</h2>
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</div>
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</div>
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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::get_shm_key(long *shm_keyp);</pre>
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<p>
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The <code class="methodname">DbEnv::get_shm_key()</code> method returns the base segment ID. This is used for Berkeley DB environment
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shared memory regions created in system memory on VxWorks or systems supporting X/Open-style shared memory
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interfaces. It may be specified using the <a class="xref" href="envset_shm_key.html" title="DbEnv::set_shm_key()">DbEnv::set_shm_key()</a>
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method.
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</p>
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<p>
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The <code class="methodname">DbEnv::get_shm_key()</code> method may be called at any time during the
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life of the application.
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</p>
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<p>
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The <code class="methodname">DbEnv::get_shm_key()</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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<h3 class="title"><a id="id3596658"></a>Parameters</h3>
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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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<h4 class="title"><a id="id3596648"></a>shm_keyp</h4>
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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::get_shm_key()</code> method returns the base segment ID in
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<span class="bold"><strong>shm_keyp</strong></span>.
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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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<h3 class="title"><a id="id3596455"></a>Class</h3>
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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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</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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<h3 class="title"><a id="id3596662"></a>See Also</h3>
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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="env.html#envlist" title="Database Environments and Related Methods">Database Environments and Related Methods</a>,
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<a class="xref" href="envset_shm_key.html" title="DbEnv::set_shm_key()">DbEnv::set_shm_key()</a>
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</p>
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<td width="40%" align="left"><a accesskey="p" href="envget_open_flags.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="env.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="envget_thread_count.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">DbEnv::get_open_flags() </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_thread_count()</td>
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</body>
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