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<?php |
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declare(strict_types=1); |
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namespace Linio\Lock; |
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class Lock |
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{ |
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/** |
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* Lock path. If not set, the system temporary directory is used. |
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* |
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* @var string |
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*/ |
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protected $path; |
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/** |
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* Lock name. |
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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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* @var Process |
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*/ |
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protected $process; |
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/** |
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* @param string $name |
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* @param Process $process |
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*/ |
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public function __construct(string $name, Process $process = null) |
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{ |
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$this->name = $name; |
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if (!($process instanceof Process)) { |
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$this->process = new Process(); |
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} else { |
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$this->process = $process; |
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} |
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} |
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/** |
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* @return string |
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*/ |
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public function getPath(): string |
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{ |
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if (empty($this->path)) { |
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return sys_get_temp_dir(); |
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} |
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return $this->path; |
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} |
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/** |
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* @param string $path |
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*/ |
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public function setPath(string $path) |
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{ |
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$this->path = $path; |
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} |
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/** |
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* @return string |
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*/ |
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public function getName(): string |
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{ |
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return $this->name; |
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} |
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/** |
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* @return string |
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*/ |
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public function getFileName(): string |
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{ |
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return $this->getPath() . DIRECTORY_SEPARATOR . $this->getName() . '.lock'; |
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} |
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/** |
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* @return bool |
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*/ |
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public function isLocked(): bool |
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{ |
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$locked = file_exists($this->getFileName()); |
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if ($locked) { |
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$pid = trim(file_get_contents($this->getFileName())); |
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if (!$this->process->isApplicationProcess($pid)) { |
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$this->release(); |
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return false; |
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} |
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return true; |
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} |
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return false; |
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} |
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/** |
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* @throws LockException |
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*/ |
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public function acquire() |
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{ |
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if (file_put_contents($this->getFileName(), getmypid()) === false) { |
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throw new LockException('Lock file could not be created.'); |
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} |
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} |
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/** |
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* @throws LockException |
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*/ |
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public function release() |
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{ |
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if (!file_exists($this->getFileName())) { |
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return; |
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} |
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if (!unlink($this->getFileName())) { |
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throw new LockException('Lock file could not be removed.'); |
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} |
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} |
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/** |
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* @throws LockException |
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*/ |
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public function forceRelease() |
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{ |
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if (!$this->isLocked()) { |
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return; |
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} |
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$pid = (int) trim(file_get_contents($this->getFileName())); |
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if (!$this->process->isApplicationProcess($pid)) { |
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$this->release(); |
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return; |
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} |
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if (!posix_kill($pid, SIGKILL)) { |
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throw new LockException('Unable to kill the running process.'); |
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} |
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$this->release(); |
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} |
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} |
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LinioIT /
lock
