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Merge pull request #27 from JanVoracek/directory-lock
Added lock implementor that uses mkdir
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<?php | ||
/** | ||
* This file is part of ninja-mutex. | ||
* | ||
* (C) Kamil Dziedzic <[email protected]> | ||
* | ||
* For the full copyright and license information, please view the LICENSE | ||
* file that was distributed with this source code. | ||
*/ | ||
namespace NinjaMutex\Lock; | ||
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/** | ||
* Lock implementor using mkdir | ||
* | ||
* @author Jan Voracek <[email protected]> | ||
*/ | ||
class DirectoryLock extends LockAbstract | ||
{ | ||
protected $dirname; | ||
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/** | ||
* @param string $dirname | ||
*/ | ||
public function __construct($dirname) | ||
{ | ||
parent::__construct(); | ||
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$this->dirname = $dirname; | ||
} | ||
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/** | ||
* @param string $name | ||
* @param bool $blocking | ||
* @return bool | ||
*/ | ||
protected function getLock($name, $blocking) | ||
{ | ||
while (!@mkdir($this->getDirectoryPath($name))) { | ||
if (!$blocking) { | ||
return false; | ||
} | ||
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usleep(rand(5000, 20000)); | ||
} | ||
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return true; | ||
} | ||
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/** | ||
* Release lock | ||
* | ||
* @param string $name name of lock | ||
* @return bool | ||
*/ | ||
public function releaseLock($name) | ||
{ | ||
if (isset($this->locks[$name])) { | ||
rmdir($this->getDirectoryPath($name)); | ||
unset($this->locks[$name]); | ||
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return true; | ||
} | ||
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return false; | ||
} | ||
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/** | ||
* @param string $name | ||
* @return string | ||
*/ | ||
protected function getDirectoryPath($name) | ||
{ | ||
return $this->dirname . DIRECTORY_SEPARATOR . $name . '.lock'; | ||
} | ||
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/** | ||
* Check if lock is locked | ||
* | ||
* @param string $name name of lock | ||
* @return bool | ||
*/ | ||
public function isLocked($name) | ||
{ | ||
if ($this->acquireLock($name, false)) { | ||
return !$this->releaseLock($name); | ||
} | ||
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return true; | ||
} | ||
} |
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