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<?php |
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/** |
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* This file is part of ninja-mutex. |
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* |
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* (C) Kamil Dziedzic <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace NinjaMutex; |
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use NinjaMutex\Lock\LockInterface; |
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/** |
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* Mutex |
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* |
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* @author Kamil Dziedzic <[email protected]> |
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*/ |
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class Mutex |
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{ |
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/** |
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* Lock implementor |
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* |
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* @var LockInterface |
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*/ |
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protected $lockImplementor; |
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/** |
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* Name of lock |
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* |
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* @var string |
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*/ |
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protected $name; |
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/** |
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* Lock counter to protect against recursive deadlock |
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* |
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* @var integer |
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*/ |
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protected $counter = 0; |
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/** |
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* @param string $name |
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* @param LockInterface $lockImplementor |
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*/ |
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public function __construct($name, LockInterface $lockImplementor) |
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{ |
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$this->name = $name; |
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$this->lockImplementor = $lockImplementor; |
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} |
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/** |
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* @param int|null $timeout |
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* @return bool |
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*/ |
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public function acquireLock($timeout = null) |
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{ |
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127 |
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if ($this->counter > 0 || |
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$this->lockImplementor->acquireLock($this->name, $timeout)) { |
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$this->counter++; |
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return true; |
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} |
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return false; |
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} |
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/** |
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* @return bool |
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*/ |
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127 |
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public function releaseLock() |
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{ |
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127 |
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if ($this->counter > 0) { |
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$this->counter--; |
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if ($this->counter > 0 || |
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$this->lockImplementor->releaseLock($this->name)) { |
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return true; |
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} |
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1 |
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$this->counter++; |
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1 |
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} |
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return false; |
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} |
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/** |
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* Try to release any obtained locks when object is destroyed |
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* |
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* This is a safe guard for cases when your php script dies unexpectedly. |
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* It's not guaranteed it will work either. |
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* |
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* You should not depend on __destruct() to release your locks, |
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* instead release them with `$released = $this->releaseLock()`A |
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* and check `$released` if lock was properly released |
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* @throws UnrecoverableMutexException |
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*/ |
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public function __destruct() |
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155 |
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{ |
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85 |
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while ($this->isAcquired()) { |
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$released = $this->releaseLock(); |
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1 |
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if (!$released) { |
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throw new UnrecoverableMutexException(sprintf( |
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'Cannot release lock in Mutex __destruct(): %s', |
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$this->name |
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)); |
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85 |
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} |
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155 |
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} |
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} |
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/** |
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* Check if Mutex is acquired |
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* |
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* @return bool |
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*/ |
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public function isAcquired() |
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155 |
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{ |
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return $this->counter > 0; |
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} |
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/** |
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* @return bool |
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*/ |
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public function isLocked() |
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{ |
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return $this->lockImplementor->isLocked($this->name); |
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} |
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} |
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arvenil /
ninja-mutex
