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-rw-r--r--lib/private/memcache/castrait.php56
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diff --git a/lib/private/memcache/castrait.php b/lib/private/memcache/castrait.php
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--- a/lib/private/memcache/castrait.php
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-<?php
-/**
- * @author Robin Appelman <icewind@owncloud.com>
- *
- * @copyright Copyright (c) 2016, ownCloud, Inc.
- * @license AGPL-3.0
- *
- * This code is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License, version 3,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License, version 3,
- * along with this program. If not, see <http://www.gnu.org/licenses/>
- *
- */
-
-namespace OC\Memcache;
-
-trait CASTrait {
- abstract public function get($key);
-
- abstract public function set($key, $value, $ttl = 0);
-
- abstract public function remove($key);
-
- abstract public function add($key, $value, $ttl = 0);
-
- /**
- * Compare and set
- *
- * @param string $key
- * @param mixed $old
- * @param mixed $new
- * @return bool
- */
- public function cas($key, $old, $new) {
- //no native cas, emulate with locking
- if ($this->add($key . '_lock', true)) {
- if ($this->get($key) === $old) {
- $this->set($key, $new);
- $this->remove($key . '_lock');
- return true;
- } else {
- $this->remove($key . '_lock');
- return false;
- }
- } else {
- return false;
- }
- }
-}