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42 lines
878 B
PHP
42 lines
878 B
PHP
<?php
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/**
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* SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
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* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
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* SPDX-License-Identifier: AGPL-3.0-only
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*/
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namespace OC\Memcache;
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trait CASTrait {
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abstract public function get($key);
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abstract public function set($key, $value, $ttl = 0);
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abstract public function remove($key);
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abstract public function add($key, $value, $ttl = 0);
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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, $new) {
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//no native cas, emulate with locking
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if ($this->add($key . '_lock', true)) {
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if ($this->get($key) === $old) {
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$this->set($key, $new);
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$this->remove($key . '_lock');
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return true;
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} else {
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$this->remove($key . '_lock');
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return false;
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}
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} else {
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return false;
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}
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}
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}
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