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<?xml version="1.0"?>
<!DOCTYPE modulesynopsis SYSTEM "../style/modulesynopsis.dtd">
<?xml-stylesheet type="text/xsl" href="../style/manual.en.xsl"?>
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<modulesynopsis metafile="mod_slotmem_plain.xml.meta">
<name>mod_slotmem_plain</name>
<description>Slot-based shared memory provider.</description>
<status>Extension</status>
<sourcefile>mod_slotmem_plain.c</sourcefile>
<identifier>mod_slotmem_plain</identifier>
<summary>
<p><code>mod_slotmem_plain</code> is a memory provider which
provides for creation and access to a plain memory segment
in which the datasets are organized in "slots."
</p>
<p>If the memory needs to be shared between threads and
processes, a better provider would be
<module>mod_slotmem_shm</module>.
</p>
<p><code>mod_slotmem_plain</code> provides the following API functions:
</p>
<dl>
<dt>apr_status_t doall(ap_slotmem_instance_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 create(ap_slotmem_instance_t **new, const char *name, apr_size_t item_size, unsigned int item_num, ap_slotmem_type_t type, apr_pool_t *pool)</dt>
<dd>create a new slotmem with each item size is item_size.</dd>
<dt>apr_status_t attach(ap_slotmem_instance_t **new, const char *name, apr_size_t *item_size, unsigned int *item_num, apr_pool_t *pool)</dt>
<dd>attach to an existing slotmem.</dd>
<dt>apr_status_t dptr(ap_slotmem_instance_t *s, unsigned int item_id, void**mem)</dt>
<dd>get the direct pointer to the memory associated with this worker slot.</dd>
<dt>apr_status_t get(ap_slotmem_instance_t *s, unsigned int item_id, unsigned char *dest, apr_size_t dest_len)</dt>
<dd>get/read the memory from this slot to dest</dd>
<dt>apr_status_t put(ap_slotmem_instance_t *slot, unsigned int item_id, unsigned char *src, apr_size_t src_len)</dt>
<dd>put/write the data from src to this slot</dd>
<dt>unsigned int num_slots(ap_slotmem_instance_t *s)</dt>
<dd>return the total number of slots in the segment</dd>
<dt>apr_size_t slot_size(ap_slotmem_instance_t *s)</dt>
<dd>return the total data size, in bytes, of a slot in the segment</dd>
<dt>apr_status_t grab(ap_slotmem_instance_t *s, unsigned int item_id);</dt>
<dd>grab or allocate a slot and mark as in-use (does not do any data copying)</dd>
<dt>apr_status_t release(ap_slotmem_instance_t *s, unsigned int item_id);</dt>
<dd>release or free a slot and mark as not in-use (does not do any data copying)</dd>
</dl>
</summary>
</modulesynopsis>
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