Moved to PHP folder
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217
php/system/libraries/Cache/drivers/Cache_wincache.php
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217
php/system/libraries/Cache/drivers/Cache_wincache.php
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<?php
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/**
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* CodeIgniter
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*
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* An open source application development framework for PHP
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*
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* This content is released under the MIT License (MIT)
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*
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* Copyright (c) 2014 - 2018, British Columbia Institute of Technology
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @package CodeIgniter
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* @author EllisLab Dev Team
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* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
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* @copyright Copyright (c) 2014 - 2018, British Columbia Institute of Technology (http://bcit.ca/)
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* @license http://opensource.org/licenses/MIT MIT License
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* @link https://codeigniter.com
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* @since Version 3.0.0
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* @filesource
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*/
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defined('BASEPATH') OR exit('No direct script access allowed');
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/**
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* CodeIgniter Wincache Caching Class
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*
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* Read more about Wincache functions here:
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* http://www.php.net/manual/en/ref.wincache.php
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*
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* @package CodeIgniter
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* @subpackage Libraries
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* @category Core
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* @author Mike Murkovic
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* @link
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*/
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class CI_Cache_wincache extends CI_Driver {
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/**
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* Class constructor
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*
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* Only present so that an error message is logged
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* if APC is not available.
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*
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* @return void
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*/
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public function __construct()
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{
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if ( ! $this->is_supported())
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{
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log_message('error', 'Cache: Failed to initialize Wincache; extension not loaded/enabled?');
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}
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}
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// ------------------------------------------------------------------------
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/**
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* Get
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*
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* Look for a value in the cache. If it exists, return the data,
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* if not, return FALSE
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*
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* @param string $id Cache Ide
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* @return mixed Value that is stored/FALSE on failure
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*/
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public function get($id)
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{
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$success = FALSE;
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$data = wincache_ucache_get($id, $success);
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// Success returned by reference from wincache_ucache_get()
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return ($success) ? $data : FALSE;
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}
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// ------------------------------------------------------------------------
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/**
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* Cache Save
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*
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* @param string $id Cache ID
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* @param mixed $data Data to store
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* @param int $ttl Time to live (in seconds)
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* @param bool $raw Whether to store the raw value (unused)
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* @return bool true on success/false on failure
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*/
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public function save($id, $data, $ttl = 60, $raw = FALSE)
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{
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return wincache_ucache_set($id, $data, $ttl);
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}
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// ------------------------------------------------------------------------
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/**
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* Delete from Cache
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*
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* @param mixed unique identifier of the item in the cache
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* @return bool true on success/false on failure
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*/
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public function delete($id)
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{
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return wincache_ucache_delete($id);
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}
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// ------------------------------------------------------------------------
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/**
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* Increment a raw value
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*
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* @param string $id Cache ID
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* @param int $offset Step/value to add
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* @return mixed New value on success or FALSE on failure
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*/
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public function increment($id, $offset = 1)
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{
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$success = FALSE;
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$value = wincache_ucache_inc($id, $offset, $success);
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return ($success === TRUE) ? $value : FALSE;
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}
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// ------------------------------------------------------------------------
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/**
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* Decrement a raw value
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*
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* @param string $id Cache ID
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* @param int $offset Step/value to reduce by
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* @return mixed New value on success or FALSE on failure
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*/
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public function decrement($id, $offset = 1)
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{
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$success = FALSE;
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$value = wincache_ucache_dec($id, $offset, $success);
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return ($success === TRUE) ? $value : FALSE;
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}
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// ------------------------------------------------------------------------
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/**
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* Clean the cache
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*
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* @return bool false on failure/true on success
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*/
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public function clean()
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{
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return wincache_ucache_clear();
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}
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// ------------------------------------------------------------------------
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/**
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* Cache Info
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*
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* @return mixed array on success, false on failure
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*/
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public function cache_info()
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{
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return wincache_ucache_info(TRUE);
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}
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// ------------------------------------------------------------------------
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/**
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* Get Cache Metadata
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*
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* @param mixed key to get cache metadata on
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* @return mixed array on success/false on failure
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*/
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public function get_metadata($id)
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{
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if ($stored = wincache_ucache_info(FALSE, $id))
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{
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$age = $stored['ucache_entries'][1]['age_seconds'];
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$ttl = $stored['ucache_entries'][1]['ttl_seconds'];
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$hitcount = $stored['ucache_entries'][1]['hitcount'];
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return array(
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'expire' => $ttl - $age,
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'hitcount' => $hitcount,
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'age' => $age,
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'ttl' => $ttl
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);
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}
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return FALSE;
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}
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// ------------------------------------------------------------------------
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/**
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* is_supported()
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*
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* Check to see if WinCache is available on this system, bail if it isn't.
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*
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* @return bool
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*/
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public function is_supported()
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{
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return (extension_loaded('wincache') && ini_get('wincache.ucenabled'));
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}
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}
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