pictcode

<?php

/**

 * Wincache storage engine for cache.

 *

 * Supports wincache 1.1.0 and higher.

 *

 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)

 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)

 *

 * Licensed under The MIT License

 * For full copyright and license information, please see the LICENSE.txt

 * Redistributions of files must retain the above copyright notice.

 *

 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)

 * @link          http://cakephp.org CakePHP(tm) Project

 * @package       Cake.Cache.Engine

 * @since         CakePHP(tm) v 1.2.0.4933

 * @license       http://www.opensource.org/licenses/mit-license.php MIT License

 */

/**

 * Wincache storage engine for cache

 *

 * @package       Cake.Cache.Engine

 */

class WincacheEngine extends CacheEngine {

/**

 * Contains the compiled group names

 * (prefixed with the global configuration prefix)

 *

 * @var array

 */

        protected $_compiledGroupNames = array();

/**

 * Initialize the Cache Engine

 *

 * Called automatically by the cache frontend

 * To reinitialize the settings call Cache::engine('EngineName', [optional] settings = array());

 *

 * @param array $settings array of setting for the engine

 * @return bool True if the engine has been successfully initialized, false if not

 * @see CacheEngine::__defaults

 */

        public function init($settings = array()) {

                if (!isset($settings['prefix'])) {

                        $settings['prefix'] = Inflector::slug(APP_DIR) . '_';

                }

                $settings += array('engine' => 'Wincache');

                parent::init($settings);

                return function_exists('wincache_ucache_info');

        }

/**

 * Write data for key into cache

 *

 * @param string $key Identifier for the data

 * @param mixed $value Data to be cached

 * @param int $duration How long to cache the data, in seconds

 * @return bool True if the data was successfully cached, false on failure

 */

        public function write($key, $value, $duration) {

                $expires = time() + $duration;

                $data = array(

                        $key . '_expires' => $expires,

                        $key => $value

                );

                $result = wincache_ucache_set($data, null, $duration);

                return empty($result);

        }

/**

 * 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

 */

        public function read($key) {

                $time = time();

                $cachetime = (int)wincache_ucache_get($key . '_expires');

                if ($cachetime < $time || ($time + $this->settings['duration']) < $cachetime) {

                        return false;

                }

                return wincache_ucache_get($key);

        }

/**

 * Increments the value of an integer cached key

 *

 * @param string $key Identifier for the data

 * @param int $offset How much to increment

 * @return New incremented value, false otherwise

 */

        public function increment($key, $offset = 1) {

                return wincache_ucache_inc($key, $offset);

        }

/**

 * Decrements the value of an integer cached key

 *

 * @param string $key Identifier for the data

 * @param int $offset How much to subtract

 * @return New decremented value, false otherwise

 */

        public function decrement($key, $offset = 1) {

                return wincache_ucache_dec($key, $offset);

        }

/**

 * Delete a key from the cache

 *

 * @param string $key Identifier for the data

 * @return bool True if the value was successfully deleted, false if it didn't exist or couldn't be removed

 */

        public function delete($key) {

                return wincache_ucache_delete($key);

        }

/**

 * Delete all keys from the cache. This will clear every

 * item in the cache matching the cache config prefix.

 *

 * @param bool $check If true, nothing will be cleared, as entries will

 *   naturally expire in wincache..

 * @return bool True Returns true.

 */

        public function clear($check) {

                if ($check) {

                        return true;

                }

                $info = wincache_ucache_info();

                $cacheKeys = $info['ucache_entries'];

                unset($info);

                foreach ($cacheKeys as $key) {

                        if (strpos($key['key_name'], $this->settings['prefix']) === 0) {

                                wincache_ucache_delete($key['key_name']);

                        }

                }

                return true;

        }

/**

 * Returns the `group value` for each of the configured groups

 * If the group initial value was not found, then it initializes

 * the group accordingly.

 *

 * @return array

 */

        public function groups() {

                if (empty($this->_compiledGroupNames)) {

                        foreach ($this->settings['groups'] as $group) {

                                $this->_compiledGroupNames[] = $this->settings['prefix'] . $group;

                        }

                }

                $groups = wincache_ucache_get($this->_compiledGroupNames);

                if (count($groups) !== count($this->settings['groups'])) {

                        foreach ($this->_compiledGroupNames as $group) {

                                if (!isset($groups[$group])) {

                                        wincache_ucache_set($group, 1);

                                        $groups[$group] = 1;

                                }

                        }

                        ksort($groups);

                }

                $result = array();

                $groups = array_values($groups);

                foreach ($this->settings['groups'] as $i => $group) {

                        $result[] = $group . $groups[$i];

                }

                return $result;

        }

/**

 * Increments the group value to simulate deletion of all keys under a group

 * old values will remain in storage until they expire.

 *

 * @param string $group The group to clear.

 * @return bool success

 */

        public function clearGroup($group) {

                $success = null;

                wincache_ucache_inc($this->settings['prefix'] . $group, 1, $success);

                return $success;

        }

}