/**
  * @param string $path
  * @param int $type self::LOCK_SHARED or self::LOCK_EXCLUSIVE
  * @return bool
  */
 public function isLocked($path, $type)
 {
     $lockValue = $this->memcache->get($path);
     if ($type === self::LOCK_SHARED) {
         return $lockValue > 0;
     } else {
         if ($type === self::LOCK_EXCLUSIVE) {
             return $lockValue === 'exclusive';
         } else {
             return false;
         }
     }
 }