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 <?php
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * If you did not receive a copy of the license and are unable to
  * obtain it through the world-wide-web, please send an email
  * to license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Cache
  * @subpackage Zend_Cache_Backend
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 
 /** @see Zend_Cache_Backend_Interface */
 // require_once 'Zend/Cache/Backend/Interface.php';
 
 /** @see Zend_Cache_Backend_ZendServer */
 // require_once 'Zend/Cache/Backend/ZendServer.php';
 
 
 /**
  * @package    Zend_Cache
  * @subpackage Zend_Cache_Backend
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Cache_Backend_ZendServer_ShMem extends Zend_Cache_Backend_ZendServer implements Zend_Cache_Backend_Interface
 {
     /**
      * Constructor
      *
      * @param  array $options associative array of options
      * @throws Zend_Cache_Exception
      */
     public function __construct(array $options = array())
     {
         if (!function_exists('zend_shm_cache_store')) {
             Zend_Cache::throwException('Zend_Cache_ZendServer_ShMem backend has to be used within Zend Server environment.');
         }
         parent::__construct($options);
     }
 
     /**
      * Store data
      *
      * @param mixed  $data       Object to store
      * @param string $id         Cache id
      * @param int    $timeToLive Time to live in seconds
      * @return bool
      */
     protected function _store($data, $id, $timeToLive)
     {
         if (zend_shm_cache_store($this->_options['namespace'] . '::' . $id,
                                   $data,
                                   $timeToLive) === false) {
             $this->_log('Store operation failed.');
             return false;
         }
         return true;
     }
 
     /**
      * Fetch data
      *
      * @param string $id Cache id
      * @return mixed|null
      */
     protected function _fetch($id)
     {
         return zend_shm_cache_fetch($this->_options['namespace'] . '::' . $id);
     }
 
     /**
      * Unset data
      *
      * @param string $id          Cache id
      * @return boolean true if no problem
      */
     protected function _unset($id)
     {
         return zend_shm_cache_delete($this->_options['namespace'] . '::' . $id);
     }
 
     /**
      * Clear cache
      */
     protected function _clear()
     {
         zend_shm_cache_clear($this->_options['namespace']);
     }
 }