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@@ 72-85 (lines=14) @@
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| 69 |
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* @param int $type self::LOCK_SHARED or self::LOCK_EXCLUSIVE |
| 70 |
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* @throws \OCP\Lock\LockedException |
| 71 |
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*/ |
| 72 |
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public function acquireLock(string $path, int $type) { |
| 73 |
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if ($type === self::LOCK_SHARED) { |
| 74 |
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if (!$this->memcache->inc($path)) { |
| 75 |
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throw new LockedException($path, null, $this->getExistingLockForException($path)); |
| 76 |
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} |
| 77 |
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} else { |
| 78 |
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$this->memcache->add($path, 0); |
| 79 |
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if (!$this->memcache->cas($path, 0, 'exclusive')) { |
| 80 |
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throw new LockedException($path, null, $this->getExistingLockForException($path)); |
| 81 |
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} |
| 82 |
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} |
| 83 |
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$this->setTTL($path); |
| 84 |
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$this->markAcquire($path, $type); |
| 85 |
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} |
| 86 |
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| 87 |
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/** |
| 88 |
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* @param string $path |
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@@ 121-134 (lines=14) @@
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| 118 |
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* @param int $targetType self::LOCK_SHARED or self::LOCK_EXCLUSIVE |
| 119 |
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* @throws \OCP\Lock\LockedException |
| 120 |
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*/ |
| 121 |
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public function changeLock(string $path, int $targetType) { |
| 122 |
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if ($targetType === self::LOCK_SHARED) { |
| 123 |
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if (!$this->memcache->cas($path, 'exclusive', 1)) { |
| 124 |
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throw new LockedException($path, null, $this->getExistingLockForException($path)); |
| 125 |
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} |
| 126 |
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} else if ($targetType === self::LOCK_EXCLUSIVE) { |
| 127 |
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// we can only change a shared lock to an exclusive if there's only a single owner of the shared lock |
| 128 |
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if (!$this->memcache->cas($path, 1, 'exclusive')) { |
| 129 |
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throw new LockedException($path, null, $this->getExistingLockForException($path)); |
| 130 |
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} |
| 131 |
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} |
| 132 |
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$this->setTTL($path); |
| 133 |
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$this->markChange($path, $targetType); |
| 134 |
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} |
| 135 |
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| 136 |
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private function getExistingLockForException($path) { |
| 137 |
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$existing = $this->memcache->get($path); |
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