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171 lines
4.4 KiB
171 lines
4.4 KiB
<?php
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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*
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* @author Andreas Fischer <bantu@owncloud.com>
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* @author Bart Visscher <bartv@thisnet.nl>
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* @author Christoph Wurst <christoph@winzerhof-wurst.at>
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* @author Joas Schilling <coding@schilljs.com>
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* @author Lukas Reschke <lukas@statuscode.ch>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Robin Appelman <robin@icewind.nl>
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*
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OC\Memcache;
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use bantu\IniGetWrapper\IniGetWrapper;
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use OCP\IMemcache;
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class APCu extends Cache implements IMemcache {
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use CASTrait {
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cas as casEmulated;
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}
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use CADTrait;
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public function get($key) {
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$result = apcu_fetch($this->getPrefix() . $key, $success);
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if (!$success) {
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return null;
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}
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return $result;
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}
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public function set($key, $value, $ttl = 0) {
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return apcu_store($this->getPrefix() . $key, $value, $ttl);
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}
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public function hasKey($key) {
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return apcu_exists($this->getPrefix() . $key);
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}
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public function remove($key) {
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return apcu_delete($this->getPrefix() . $key);
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}
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public function clear($prefix = '') {
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$ns = $this->getPrefix() . $prefix;
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$ns = preg_quote($ns, '/');
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if (class_exists('\APCIterator')) {
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$iter = new \APCIterator('user', '/^' . $ns . '/', APC_ITER_KEY);
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} else {
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$iter = new \APCUIterator('/^' . $ns . '/', APC_ITER_KEY);
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}
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return apcu_delete($iter);
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}
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/**
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* Set a value in the cache if it's not already stored
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*
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* @param string $key
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* @param mixed $value
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* @param int $ttl Time To Live in seconds. Defaults to 60*60*24
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* @return bool
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*/
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public function add($key, $value, $ttl = 0) {
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return apcu_add($this->getPrefix() . $key, $value, $ttl);
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}
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/**
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* Increase a stored number
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*
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* @param string $key
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* @param int $step
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* @return int | bool
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*/
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public function inc($key, $step = 1) {
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$this->add($key, 0);
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/**
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* TODO - hack around a PHP 7 specific issue in APCu
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*
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* on PHP 7 the apcu_inc method on a non-existing object will increment
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* "0" and result in "1" as value - therefore we check for existence
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* first
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*
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* on PHP 5.6 this is not the case
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*
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* see https://github.com/krakjoe/apcu/issues/183#issuecomment-244038221
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* for details
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*/
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return apcu_exists($this->getPrefix() . $key)
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? apcu_inc($this->getPrefix() . $key, $step)
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: false;
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}
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/**
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* Decrease a stored number
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*
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* @param string $key
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* @param int $step
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* @return int | bool
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*/
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public function dec($key, $step = 1) {
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/**
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* TODO - hack around a PHP 7 specific issue in APCu
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*
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* on PHP 7 the apcu_dec method on a non-existing object will decrement
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* "0" and result in "-1" as value - therefore we check for existence
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* first
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*
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* on PHP 5.6 this is not the case
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*
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* see https://github.com/krakjoe/apcu/issues/183#issuecomment-244038221
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* for details
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*/
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return apcu_exists($this->getPrefix() . $key)
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? apcu_dec($this->getPrefix() . $key, $step)
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: false;
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}
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/**
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* Compare and set
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*
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* @param string $key
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* @param mixed $old
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* @param mixed $new
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* @return bool
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*/
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public function cas($key, $old, $new) {
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// apc only does cas for ints
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if (is_int($old) and is_int($new)) {
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return apcu_cas($this->getPrefix() . $key, $old, $new);
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} else {
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return $this->casEmulated($key, $old, $new);
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}
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}
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/**
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* @return bool
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*/
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public static function isAvailable() {
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if (!extension_loaded('apcu')) {
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return false;
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} elseif (!\OC::$server->get(IniGetWrapper::class)->getBool('apc.enabled')) {
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return false;
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} elseif (!\OC::$server->get(IniGetWrapper::class)->getBool('apc.enable_cli') && \OC::$CLI) {
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return false;
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} elseif (
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version_compare(phpversion('apc') ?: '0.0.0', '4.0.6') === -1 &&
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version_compare(phpversion('apcu') ?: '0.0.0', '5.1.0') === -1
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) {
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return false;
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} else {
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return true;
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}
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}
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}
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