blob: d44d98cba0b56da0ef35fee1cfa917e30296f150 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
<?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 CADTrait {
abstract public function get($key);
abstract public function remove($key);
abstract public function add($key, $value, $ttl = 0);
/**
* Compare and delete
*
* @param string $key
* @param mixed $old
* @return bool
*/
public function cad($key, $old) {
//no native cas, emulate with locking
if ($this->add($key . '_lock', true)) {
if ($this->get($key) === $old) {
$this->remove($key);
$this->remove($key . '_lock');
return true;
} else {
$this->remove($key . '_lock');
return false;
}
} else {
return false;
}
}
}
|
