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<?php
/**
*
* @package acm
* @copyright (c) 2005, 2009 phpBB Group
* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
*
*/
/**
* @ignore
*/
if (!defined('IN_PHPBB'))
{
exit;
}
/**
* ACM for eAccelerator
* @package acm
* @todo Missing locks from destroy() talk with David
*/
class phpbb_cache_driver_eaccelerator extends phpbb_cache_driver_memory
{
var $extension = 'eaccelerator';
var $function = 'eaccelerator_get';
var $serialize_header = '#phpbb-serialized#';
/**
* Purge cache data
*
* @return null
*/
function purge()
{
foreach (eaccelerator_list_keys() as $var)
{
// @todo Check why the substr()
// @todo Only unset vars matching $this->key_prefix
eaccelerator_rm(substr($var['name'], 1));
}
parent::purge();
}
/**
* Perform cache garbage collection
*
* @return null
*/
function tidy()
{
eaccelerator_gc();
set_config('cache_last_gc', time(), true);
}
/**
* Fetch an item from the cache
*
* @access protected
* @param string $var Cache key
* @return mixed Cached data
*/
function _read($var)
{
$result = eaccelerator_get($this->key_prefix . $var);
if ($result === null)
{
return false;
}
// Handle serialized objects
if (is_string($result) && strpos($result, $this->serialize_header . 'O:') === 0)
{
$result = unserialize(substr($result, strlen($this->serialize_header)));
}
return $result;
}
/**
* Store data in the cache
*
* @access protected
* @param string $var Cache key
* @param mixed $data Data to store
* @param int $ttl Time-to-live of cached data
* @return bool True if the operation succeeded
*/
function _write($var, $data, $ttl = 2592000)
{
// Serialize objects and make them easy to detect
$data = (is_object($data)) ? $this->serialize_header . serialize($data) : $data;
return eaccelerator_put($this->key_prefix . $var, $data, $ttl);
}
/**
* Remove an item from the cache
*
* @access protected
* @param string $var Cache key
* @return bool True if the operation succeeded
*/
function _delete($var)
{
return eaccelerator_rm($this->key_prefix . $var);
}
}
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