hiqdev\assetpackagist\helpers\Locker::getHandle PHP Method

    protected function getHandle()
    {
        if ($this->_handle === null) {
            if (isset(static::$_handles[$this->_path])) {
                $this->_handle = static::$_handles[$this->_path];
            } else {
                if (!file_exists($this->_path)) {
                    if (file_put_contents($this->_path, 'lock') === false) {
                        throw new Exception('failed create lock file');
                    }
                }
                $this->_handle = fopen($this->_path, 'r+');
            }
        }
        return $this->_handle;
    }