1 files changed, 161 insertions, 0 deletions
diff --git a/system/libraries/drivers/Cache/Xcache.php b/system/libraries/drivers/Cache/Xcache.php
new file mode 100644
index 0000000..6761983
--- /dev/null
+++ b/system/libraries/drivers/Cache/Xcache.php
@@ -0,0 +1,161 @@
+<?php defined('SYSPATH') OR die('No direct access allowed.');
+/**
+ * XCache-based Cache driver.
+ * 
+ * $Id: Memcache.php 4605 2009-09-14 17:22:21Z kiall $
+ *
+ * @package    Cache
+ * @author     Kohana Team
+ * @copyright  (c) 2007-2009 Kohana Team
+ * @license    http://kohanaphp.com/license
+ * @TODO       Check if XCache cleans its own keys.
+ */
+class Cache_Xcache_Driver extends Cache_Driver {
+	protected $config;
+
+	public function __construct($config)
+	{
+		if ( ! extension_loaded('xcache'))
+			throw new Cache_Exception('The xcache PHP extension must be loaded to use this driver.');
+
+		$this->config = $config;
+	}
+
+	public function set($items, $tags = NULL, $lifetime = NULL)
+	{
+		if ($tags !== NULL)
+		{
+			Kohana_Log::add('debug', __('Cache: XCache driver does not support tags'));
+		}
+
+		foreach ($items as $key => $value)
+		{
+			if (is_resource($value))
+				throw new Cache_Exception('Caching of resources is impossible, because resources cannot be serialised.');
+
+			if ( ! xcache_set($key, $value, $lifetime))
+			{
+				return FALSE;
+			}
+		}
+
+		return TRUE;
+	}
+
+	public function get($keys, $single = FALSE)
+	{
+		$items = array();
+
+		foreach ($keys as $key)
+		{
+			if (xcache_isset($key))
+			{
+				$items[$key] = xcache_get($key);
+			}
+			else
+			{
+				$items[$key] = NULL;
+			}
+		}
+
+		if ($single)
+		{
+			return ($items === FALSE OR count($items) > 0) ? current($items) : NULL;
+		}
+		else
+		{
+			return ($items === FALSE) ? array() : $items;
+		}
+	}
+
+	/**
+	 * Get cache items by tag
+	 */
+	public function get_tag($tags)
+	{
+		Kohana_Log::add('debug', __('Cache: XCache driver does not support tags'));
+		return NULL;
+	}
+
+	/**
+	 * Delete cache item by key
+	 */
+	public function delete($keys)
+	{
+		foreach ($keys as $key)
+		{
+			if ( ! xcache_unset($key))
+			{
+				return FALSE;
+			}
+		}
+
+		return TRUE;
+	}
+
+	/**
+	 * Delete cache items by tag
+	 */
+	public function delete_tag($tags)
+	{
+		Kohana_Log::add('debug', __('Cache: XCache driver does not support tags'));
+		return NULL;
+	}
+
+	/**
+	 * Empty the cache
+	 */
+	public function delete_all()
+	{
+		$this->auth();
+		$result = TRUE;
+
+		for ($i = 0, $max = xcache_count(XC_TYPE_VAR); $i < $max; $i++)
+		{
+			if (xcache_clear_cache(XC_TYPE_VAR, $i) !== NULL)
+			{
+				$result = FALSE;
+				break;
+			}
+		}
+
+		// Undo the login
+		$this->auth(TRUE);
+
+		return $result;
+	}
+
+	private function auth($reverse = FALSE)
+	{
+		static $backup = array();
+
+		$keys = array('PHP_AUTH_USER', 'PHP_AUTH_PW');
+
+		foreach ($keys as $key)
+		{
+			if ($reverse)
+			{
+				if (isset($backup[$key]))
+				{
+					$_SERVER[$key] = $backup[$key];
+					unset($backup[$key]);
+				}
+				else
+				{
+					unset($_SERVER[$key]);
+				}
+			}
+			else
+			{
+				$value = getenv($key);
+
+				if ( ! empty($value))
+				{
+					$backup[$key] = $value;
+				}
+
+				$_SERVER[$key] = $this->config->{$key};
+			}
+		}
+	}
+} // End Cache XCache Driver