Nextras\Orm\Mapper\Memory\ArrayMapper::lock PHP Метод

    protected function lock()
    {
        if (self::$lock) {
            throw new LogicException('Critical section has already beed entered.');
        }
        $file = realpath(sys_get_temp_dir()) . '/NextrasOrmArrayMapper.lock.' . md5(__FILE__);
        $handle = fopen($file, 'c+');
        if (!$handle) {
            throw new IOException('Unable to create critical section.');
        }
        flock($handle, LOCK_EX);
        self::$lock = $handle;
    }