nextcloud /
server
@@ -27,119 +27,119 @@ |
||
| 27 | 27 | use OCP\IMemcache; |
| 28 | 28 | |
| 29 | 29 | class MemcacheLockingProvider extends AbstractLockingProvider { |
| 30 | - /** |
|
| 31 | - * @var \OCP\IMemcache |
|
| 32 | - */ |
|
| 33 | - private $memcache; |
|
| 30 | + /** |
|
| 31 | + * @var \OCP\IMemcache |
|
| 32 | + */ |
|
| 33 | + private $memcache; |
|
| 34 | 34 | |
| 35 | - /** |
|
| 36 | - * @param \OCP\IMemcache $memcache |
|
| 37 | - * @param int $ttl |
|
| 38 | - */ |
|
| 39 | - public function __construct(IMemcache $memcache, $ttl = 3600) { |
|
| 40 | - $this->memcache = $memcache; |
|
| 41 | - $this->ttl = $ttl; |
|
| 42 | - } |
|
| 35 | + /** |
|
| 36 | + * @param \OCP\IMemcache $memcache |
|
| 37 | + * @param int $ttl |
|
| 38 | + */ |
|
| 39 | + public function __construct(IMemcache $memcache, $ttl = 3600) { |
|
| 40 | + $this->memcache = $memcache; |
|
| 41 | + $this->ttl = $ttl; |
|
| 42 | + } |
|
| 43 | 43 | |
| 44 | - private function setTTL($path) { |
|
| 45 | - if ($this->memcache instanceof IMemcacheTTL) { |
|
| 46 | - $this->memcache->setTTL($path, $this->ttl); |
|
| 47 | - } |
|
| 48 | - } |
|
| 44 | + private function setTTL($path) { |
|
| 45 | + if ($this->memcache instanceof IMemcacheTTL) { |
|
| 46 | + $this->memcache->setTTL($path, $this->ttl); |
|
| 47 | + } |
|
| 48 | + } |
|
| 49 | 49 | |
| 50 | - /** |
|
| 51 | - * @param string $path |
|
| 52 | - * @param int $type self::LOCK_SHARED or self::LOCK_EXCLUSIVE |
|
| 53 | - * @return bool |
|
| 54 | - */ |
|
| 55 | - public function isLocked($path, $type) { |
|
| 56 | - $lockValue = $this->memcache->get($path); |
|
| 57 | - if ($type === self::LOCK_SHARED) { |
|
| 58 | - return $lockValue > 0; |
|
| 59 | - } else if ($type === self::LOCK_EXCLUSIVE) { |
|
| 60 | - return $lockValue === 'exclusive'; |
|
| 61 | - } else { |
|
| 62 | - return false; |
|
| 63 | - } |
|
| 64 | - } |
|
| 50 | + /** |
|
| 51 | + * @param string $path |
|
| 52 | + * @param int $type self::LOCK_SHARED or self::LOCK_EXCLUSIVE |
|
| 53 | + * @return bool |
|
| 54 | + */ |
|
| 55 | + public function isLocked($path, $type) { |
|
| 56 | + $lockValue = $this->memcache->get($path); |
|
| 57 | + if ($type === self::LOCK_SHARED) { |
|
| 58 | + return $lockValue > 0; |
|
| 59 | + } else if ($type === self::LOCK_EXCLUSIVE) { |
|
| 60 | + return $lockValue === 'exclusive'; |
|
| 61 | + } else { |
|
| 62 | + return false; |
|
| 63 | + } |
|
| 64 | + } |
|
| 65 | 65 | |
| 66 | - /** |
|
| 67 | - * @param string $path |
|
| 68 | - * @param int $type self::LOCK_SHARED or self::LOCK_EXCLUSIVE |
|
| 69 | - * @throws \OCP\Lock\LockedException |
|
| 70 | - */ |
|
| 71 | - public function acquireLock($path, $type) { |
|
| 72 | - if ($type === self::LOCK_SHARED) { |
|
| 73 | - if (!$this->memcache->inc($path)) { |
|
| 74 | - throw new LockedException($path, null, $this->getExistingLockForException($path)); |
|
| 75 | - } |
|
| 76 | - } else { |
|
| 77 | - $this->memcache->add($path, 0); |
|
| 78 | - if (!$this->memcache->cas($path, 0, 'exclusive')) { |
|
| 79 | - throw new LockedException($path, null, $this->getExistingLockForException($path)); |
|
| 80 | - } |
|
| 81 | - } |
|
| 82 | - $this->setTTL($path); |
|
| 83 | - $this->markAcquire($path, $type); |
|
| 84 | - } |
|
| 66 | + /** |
|
| 67 | + * @param string $path |
|
| 68 | + * @param int $type self::LOCK_SHARED or self::LOCK_EXCLUSIVE |
|
| 69 | + * @throws \OCP\Lock\LockedException |
|
| 70 | + */ |
|
| 71 | + public function acquireLock($path, $type) { |
|
| 72 | + if ($type === self::LOCK_SHARED) { |
|
| 73 | + if (!$this->memcache->inc($path)) { |
|
| 74 | + throw new LockedException($path, null, $this->getExistingLockForException($path)); |
|
| 75 | + } |
|
| 76 | + } else { |
|
| 77 | + $this->memcache->add($path, 0); |
|
| 78 | + if (!$this->memcache->cas($path, 0, 'exclusive')) { |
|
| 79 | + throw new LockedException($path, null, $this->getExistingLockForException($path)); |
|
| 80 | + } |
|
| 81 | + } |
|
| 82 | + $this->setTTL($path); |
|
| 83 | + $this->markAcquire($path, $type); |
|
| 84 | + } |
|
| 85 | 85 | |
| 86 | - /** |
|
| 87 | - * @param string $path |
|
| 88 | - * @param int $type self::LOCK_SHARED or self::LOCK_EXCLUSIVE |
|
| 89 | - */ |
|
| 90 | - public function releaseLock($path, $type) { |
|
| 91 | - if ($type === self::LOCK_SHARED) { |
|
| 92 | - $newValue = 0; |
|
| 93 | - if ($this->getOwnSharedLockCount($path) === 1) { |
|
| 94 | - $removed = $this->memcache->cad($path, 1); // if we're the only one having a shared lock we can remove it in one go |
|
| 95 | - if (!$removed) { //someone else also has a shared lock, decrease only |
|
| 96 | - $newValue = $this->memcache->dec($path); |
|
| 97 | - } |
|
| 98 | - } else { |
|
| 99 | - // if we own more than one lock ourselves just decrease |
|
| 100 | - $newValue = $this->memcache->dec($path); |
|
| 101 | - } |
|
| 86 | + /** |
|
| 87 | + * @param string $path |
|
| 88 | + * @param int $type self::LOCK_SHARED or self::LOCK_EXCLUSIVE |
|
| 89 | + */ |
|
| 90 | + public function releaseLock($path, $type) { |
|
| 91 | + if ($type === self::LOCK_SHARED) { |
|
| 92 | + $newValue = 0; |
|
| 93 | + if ($this->getOwnSharedLockCount($path) === 1) { |
|
| 94 | + $removed = $this->memcache->cad($path, 1); // if we're the only one having a shared lock we can remove it in one go |
|
| 95 | + if (!$removed) { //someone else also has a shared lock, decrease only |
|
| 96 | + $newValue = $this->memcache->dec($path); |
|
| 97 | + } |
|
| 98 | + } else { |
|
| 99 | + // if we own more than one lock ourselves just decrease |
|
| 100 | + $newValue = $this->memcache->dec($path); |
|
| 101 | + } |
|
| 102 | 102 | |
| 103 | - // if we somehow release more locks then exists, reset the lock |
|
| 104 | - if ($newValue < 0) { |
|
| 105 | - $this->memcache->cad($path, $newValue); |
|
| 106 | - } |
|
| 107 | - } else if ($type === self::LOCK_EXCLUSIVE) { |
|
| 108 | - $this->memcache->cad($path, 'exclusive'); |
|
| 109 | - } |
|
| 110 | - $this->markRelease($path, $type); |
|
| 111 | - } |
|
| 103 | + // if we somehow release more locks then exists, reset the lock |
|
| 104 | + if ($newValue < 0) { |
|
| 105 | + $this->memcache->cad($path, $newValue); |
|
| 106 | + } |
|
| 107 | + } else if ($type === self::LOCK_EXCLUSIVE) { |
|
| 108 | + $this->memcache->cad($path, 'exclusive'); |
|
| 109 | + } |
|
| 110 | + $this->markRelease($path, $type); |
|
| 111 | + } |
|
| 112 | 112 | |
| 113 | - /** |
|
| 114 | - * Change the type of an existing lock |
|
| 115 | - * |
|
| 116 | - * @param string $path |
|
| 117 | - * @param int $targetType self::LOCK_SHARED or self::LOCK_EXCLUSIVE |
|
| 118 | - * @throws \OCP\Lock\LockedException |
|
| 119 | - */ |
|
| 120 | - public function changeLock($path, $targetType) { |
|
| 121 | - if ($targetType === self::LOCK_SHARED) { |
|
| 122 | - if (!$this->memcache->cas($path, 'exclusive', 1)) { |
|
| 123 | - throw new LockedException($path, null, $this->getExistingLockForException($path)); |
|
| 124 | - } |
|
| 125 | - } else if ($targetType === self::LOCK_EXCLUSIVE) { |
|
| 126 | - // we can only change a shared lock to an exclusive if there's only a single owner of the shared lock |
|
| 127 | - if (!$this->memcache->cas($path, 1, 'exclusive')) { |
|
| 128 | - throw new LockedException($path, null, $this->getExistingLockForException($path)); |
|
| 129 | - } |
|
| 130 | - } |
|
| 131 | - $this->setTTL($path); |
|
| 132 | - $this->markChange($path, $targetType); |
|
| 133 | - } |
|
| 113 | + /** |
|
| 114 | + * Change the type of an existing lock |
|
| 115 | + * |
|
| 116 | + * @param string $path |
|
| 117 | + * @param int $targetType self::LOCK_SHARED or self::LOCK_EXCLUSIVE |
|
| 118 | + * @throws \OCP\Lock\LockedException |
|
| 119 | + */ |
|
| 120 | + public function changeLock($path, $targetType) { |
|
| 121 | + if ($targetType === self::LOCK_SHARED) { |
|
| 122 | + if (!$this->memcache->cas($path, 'exclusive', 1)) { |
|
| 123 | + throw new LockedException($path, null, $this->getExistingLockForException($path)); |
|
| 124 | + } |
|
| 125 | + } else if ($targetType === self::LOCK_EXCLUSIVE) { |
|
| 126 | + // we can only change a shared lock to an exclusive if there's only a single owner of the shared lock |
|
| 127 | + if (!$this->memcache->cas($path, 1, 'exclusive')) { |
|
| 128 | + throw new LockedException($path, null, $this->getExistingLockForException($path)); |
|
| 129 | + } |
|
| 130 | + } |
|
| 131 | + $this->setTTL($path); |
|
| 132 | + $this->markChange($path, $targetType); |
|
| 133 | + } |
|
| 134 | 134 | |
| 135 | - private function getExistingLockForException($path) { |
|
| 136 | - $existing = $this->memcache->get($path); |
|
| 137 | - if (!$existing) { |
|
| 138 | - return 'none'; |
|
| 139 | - } else if ($existing === 'exclusive') { |
|
| 140 | - return $existing; |
|
| 141 | - } else { |
|
| 142 | - return $existing . ' shared locks'; |
|
| 143 | - } |
|
| 144 | - } |
|
| 135 | + private function getExistingLockForException($path) { |
|
| 136 | + $existing = $this->memcache->get($path); |
|
| 137 | + if (!$existing) { |
|
| 138 | + return 'none'; |
|
| 139 | + } else if ($existing === 'exclusive') { |
|
| 140 | + return $existing; |
|
| 141 | + } else { |
|
| 142 | + return $existing . ' shared locks'; |
|
| 143 | + } |
|
| 144 | + } |
|
| 145 | 145 | } |
