blob: aa203f6a90bedcc6b2f411d9ae4b7071ac105168 (
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
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
<?php
declare(strict_types=1);
/**
* SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
* SPDX-License-Identifier: AGPL-3.0-only
*/
namespace OC\Lock;
use OCP\Lock\ILockingProvider;
/**
* Base locking provider that keeps track of locks acquired during the current request
* to release any leftover locks at the end of the request
*/
abstract class AbstractLockingProvider implements ILockingProvider {
protected array $acquiredLocks = [
'shared' => [],
'exclusive' => []
];
/**
*
* @param int $ttl how long until we clear stray locks in seconds
*/
public function __construct(protected int $ttl) {
}
/** @inheritDoc */
protected function hasAcquiredLock(string $path, int $type): bool {
if ($type === self::LOCK_SHARED) {
return isset($this->acquiredLocks['shared'][$path]) && $this->acquiredLocks['shared'][$path] > 0;
} else {
return isset($this->acquiredLocks['exclusive'][$path]) && $this->acquiredLocks['exclusive'][$path] === true;
}
}
/** @inheritDoc */
protected function markAcquire(string $path, int $targetType): void {
if ($targetType === self::LOCK_SHARED) {
if (!isset($this->acquiredLocks['shared'][$path])) {
$this->acquiredLocks['shared'][$path] = 0;
}
$this->acquiredLocks['shared'][$path]++;
} else {
$this->acquiredLocks['exclusive'][$path] = true;
}
}
/** @inheritDoc */
protected function markRelease(string $path, int $type): void {
if ($type === self::LOCK_SHARED) {
if (isset($this->acquiredLocks['shared'][$path]) and $this->acquiredLocks['shared'][$path] > 0) {
$this->acquiredLocks['shared'][$path]--;
if ($this->acquiredLocks['shared'][$path] === 0) {
unset($this->acquiredLocks['shared'][$path]);
}
}
} elseif ($type === self::LOCK_EXCLUSIVE) {
unset($this->acquiredLocks['exclusive'][$path]);
}
}
/** @inheritDoc */
protected function markChange(string $path, int $targetType): void {
if ($targetType === self::LOCK_SHARED) {
unset($this->acquiredLocks['exclusive'][$path]);
if (!isset($this->acquiredLocks['shared'][$path])) {
$this->acquiredLocks['shared'][$path] = 0;
}
$this->acquiredLocks['shared'][$path]++;
} elseif ($targetType === self::LOCK_EXCLUSIVE) {
$this->acquiredLocks['exclusive'][$path] = true;
$this->acquiredLocks['shared'][$path]--;
}
}
/** @inheritDoc */
public function releaseAll(): void {
foreach ($this->acquiredLocks['shared'] as $path => $count) {
for ($i = 0; $i < $count; $i++) {
$this->releaseLock($path, self::LOCK_SHARED);
}
}
foreach ($this->acquiredLocks['exclusive'] as $path => $hasLock) {
$this->releaseLock($path, self::LOCK_EXCLUSIVE);
}
}
protected function getOwnSharedLockCount(string $path): int {
return $this->acquiredLocks['shared'][$path] ?? 0;
}
}
|
