--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cake/libs/cache/apc.php	Sun Jul 24 21:08:31 2011 +0900
@@ -0,0 +1,123 @@
+<?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');
+	}
+}