[李景山php]thinkphp核心源码注释|Eaccelerator.class.php

<?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 <[e-mail]>// +----------------------------------------------------------------------namespace Think\Cache\Driver;use Think\Cache;defined('THINK_PATH') or exit();/** * Eaccelerator缓存驱动 */// opcode 一类的缓存class Eaccelerator extends Cache {    /**     * 架构函数     * @param array $options 缓存参数     * @access public     */    // 通用参数 设置    public function __construct($options=array()) {        $this->options['expire'] =  isset($options['expire'])?  $options['expire']  :   C('DATA_CACHE_TIME');        $this->options['prefix'] =  isset($options['prefix'])?  $options['prefix']  :   C('DATA_CACHE_PREFIX');                $this->options['length'] =  isset($options['length'])?  $options['length']  :   0;    }    /**     * 读取缓存     * @access public     * @param string $name 缓存变量名     * @return mixed     */    // 官方获取缓存封装     public function get($name) {        N('cache_read',1);         return eaccelerator_get($this->options['prefix'].$name);     }    /**     * 写入缓存     * @access public     * @param string $name 缓存变量名     * @param mixed $value  存储数据     * @param integer $expire  有效时间（秒）     * @return boolean     */    // 官方获取缓存设置     public function set($name, $value, $expire = null) {        N('cache_write',1);        if(is_null($expire)) {            $expire  =  $this->options['expire'];        }        $name   =   $this->options['prefix'].$name;         // 上面为基础处理         // 开始正式的 写入处理        eaccelerator_lock($name); // 锁定        if(eaccelerator_put($name, $value, $expire)) {            if($this->options['length']>0) {                // 记录缓存队列                $this->queue($name);            }            return true;        }        return false;     }    /**     * 删除缓存     * @access public     * @param string $name 缓存变量名     * @return boolean     */     public function rm($name) {         return eaccelerator_rm($this->options['prefix'].$name);     }}