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<title>mod_plainmem - Apache HTTP Server</title>
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<p class="apache">Apache HTTP Server Version 2.3</p>
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<a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.3</a> > <a href="./">Modules</a></div>
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<div id="preamble"><h1>Apache Module mod_plainmem</h1>
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<p><span>Available Languages: </span><a href="/en/mod/mod_plainmem.html" title="English"> en </a></p>
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<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Slot-based shared memory provider.</td></tr>
<tr><th><a href="module-dict.html#ModuleIdentifier">Module�Identifier:</a></th><td>plainmem_module</td></tr>
<tr><th><a href="module-dict.html#SourceFile">Source�File:</a></th><td>mod_plainmem.c</td></tr></table>
<h3>Summary</h3>
<p><code>mod_plainmem</code> is a memory provider which
provides for creation and access to a plain memory segment
in which the datasets are organized in "slots." Although
it can be used directly, normally <code class="module"><a href="/mod/mod_slotmem.html">mod_slotmem</a></code>
is used as a front-end.
</p>
<p>If the memory needs to be shared between threads and
processes, a better provider would be
</p>
<p><code>mod_plainmem</code> provides the following
API functions:
</p>
<dl>
<dt>apr_status_t slotmem_do(ap_slotmem_t *s, ap_slotmem_callback_fn_t *func, void *data, apr_pool_t *pool)</dt>
<dd>call the callback on all worker slots</dd>
<dt>apr_status_t slotmem_create(ap_slotmem_t **new, const char *name, apr_size_t item_size, int item_num, apr_pool_t *pool)</dt>
<dd>create a new slotmem with each item size is item_size.</dd>
<dt>apr_status_t slotmem_attach(ap_slotmem_t **new, const char *name, apr_size_t *item_size, int *item_num, apr_pool_t *pool)</dt>
<dd>attach to an existing slotmem.</dd>
<dt>apr_status_t slotmem_mem(ap_slotmem_t *s, int item_id, void**mem)</dt>
<dd>get the memory associated with this worker slot.</dd>
<dt>apr_status_t slotmem_lock(ap_slotmem_t *s)</dt>
<dd>lock the memory segment</dd>
<dt>(apr_status_t slotmem_unlock(ap_slotmem_t *s)</dt>
<dd>unlock the memory segment</dd>
</dl>
</div>
<div id="quickview"><h3 class="directives">Directives</h3>
<p>This module provides no
directives.</p>
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<p class="apache">Copyright 2009 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p>
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