khanat-opennel-code/code/web/public_php/webtt/cake/libs/cache/apc.php

123 lines
3.4 KiB
PHP

<?php
/**
* APC storage engine for cache.
*
*
* PHP versions 4 and 5
*
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
* Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
* @link http://cakephp.org CakePHP(tm) Project
* @package cake
* @subpackage cake.cake.libs.cache
* @since CakePHP(tm) v 1.2.0.4933
* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
*/
/**
* APC storage engine for cache
*
* @package cake
* @subpackage cake.cake.libs.cache
*/
class ApcEngine extends CacheEngine {
/**
* Initialize the Cache Engine
*
* Called automatically by the cache frontend
* To reinitialize the settings call Cache::engine('EngineName', [optional] settings = array());
*
* @param array $setting array of setting for the engine
* @return boolean True if the engine has been successfully initialized, false if not
* @see CacheEngine::__defaults
* @access public
*/
function init($settings = array()) {
parent::init(array_merge(array('engine' => 'Apc', 'prefix' => Inflector::slug(APP_DIR) . '_'), $settings));
return function_exists('apc_cache_info');
}
/**
* Write data for key into cache
*
* @param string $key Identifier for the data
* @param mixed $value Data to be cached
* @param integer $duration How long to cache the data, in seconds
* @return boolean True if the data was succesfully cached, false on failure
* @access public
*/
function write($key, &$value, $duration) {
$expires = time() + $duration;
apc_store($key.'_expires', $expires, $duration);
return apc_store($key, $value, $duration);
}
/**
* Read a key from the cache
*
* @param string $key Identifier for the data
* @return mixed The cached data, or false if the data doesn't exist, has expired, or if there was an error fetching it
* @access public
*/
function read($key) {
$time = time();
$cachetime = intval(apc_fetch($key.'_expires'));
if ($cachetime < $time || ($time + $this->settings['duration']) < $cachetime) {
return false;
}
return apc_fetch($key);
}
/**
* Increments the value of an integer cached key
*
* @param string $key Identifier for the data
* @param integer $offset How much to increment
* @param integer $duration How long to cache the data, in seconds
* @return New incremented value, false otherwise
* @access public
*/
function increment($key, $offset = 1) {
return apc_inc($key, $offset);
}
/**
* Decrements the value of an integer cached key
*
* @param string $key Identifier for the data
* @param integer $offset How much to substract
* @param integer $duration How long to cache the data, in seconds
* @return New decremented value, false otherwise
* @access public
*/
function decrement($key, $offset = 1) {
return apc_dec($key, $offset);
}
/**
* Delete a key from the cache
*
* @param string $key Identifier for the data
* @return boolean True if the value was succesfully deleted, false if it didn't exist or couldn't be removed
* @access public
*/
function delete($key) {
return apc_delete($key);
}
/**
* Delete all keys from the cache
*
* @return boolean True if the cache was succesfully cleared, false otherwise
* @access public
*/
function clear() {
return apc_clear_cache('user');
}
}