} finally {
                synchronized( sem ) {
                    sem.count--;
                    sem.notify();
                }
            }
        }
    }

    static NbtAddress lookupServerOrWorkgroup( String name, InetAddress svr )
                                                    throws UnknownHostException {
        Sem sem = new Sem( 2 );
        int type = NbtAddress.isWINS( svr ) ? 0x1b : 0x1d;