ThinkPHP/Library/Think/Cache/Driver/Shmop.class.php

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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2014 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
namespace Think\Cache\Driver;
use Think\Cache;
defined('THINK_PATH') or exit();
/**
 * Shmop缓存驱动 
 */
class Shmop extends Cache {

    /**
     * 架构函数
     * @param array $options 缓存参数
     * @access public
     */
    public function __construct($options=array()) {
        if ( !extension_loaded('shmop') ) {
            E(L('_NOT_SUPPORT_').':shmop');
        }
        if(!empty($options)){
            $options = array(
                'size'      => C('SHARE_MEM_SIZE'),
                'temp'      => TEMP_PATH,
                'project'   => 's',
                'length'    =>  0,
                );
        }
        $this->options = $options;
        $this->options['prefix'] =  isset($options['prefix'])?  $options['prefix']  :   C('DATA_CACHE_PREFIX');        
        $this->options['length'] =  isset($options['length'])?  $options['length']  :   0;        
        $this->handler = $this->_ftok($this->options['project']);
    }

    /**
     * 读取缓存
     * @access public
     * @param string $name 缓存变量名
     * @return mixed
     */
    public function get($name = false) {
        N('cache_read',1);
        $id = shmop_open($this->handler, 'c', 0600, 0);
        if ($id !== false) {
            $ret = unserialize(shmop_read($id, 0, shmop_size($id)));
            shmop_close($id);

            if ($name === false) {
                return $ret;
            }
            $name   =   $this->options['prefix'].$name;
            if(isset($ret[$name])) {
                $content   =  $ret[$name];