lrwm := NewLRWMutex()

	if !lrwm.GetRLock(ctx, "", "object1", time.Second) {
		panic("Failed to acquire read lock")
	}
	// fmt.Println("1st read lock acquired, waiting...")

	if !lrwm.GetRLock(ctx, "", "object1", time.Second) {
		panic("Failed to acquire read lock")
	}
	// fmt.Println("2nd read lock acquired, waiting...")

	go func() {
		time.Sleep(2 * time.Second)
		lrwm.RUnlock()

     */
    public SmbTreeImpl acquire ( boolean track ) {
        long usage = this.usageCount.incrementAndGet();
        if ( log.isTraceEnabled() ) {
            log.trace("Acquire tree " + usage + " " + this);
        }

        if ( track && this.traceResource ) {
            synchronized ( this.acquires ) {
                this.acquires.add(truncateTrace(Thread.currentThread().getStackTrace()));

        }
    }


    /**
     * @return a file handle with increased usage count
     */
    public SmbFileHandleImpl acquire () {
        long usage = this.usageCount.incrementAndGet();
        if ( log.isTraceEnabled() ) {
            log.trace(String.format("Acquire %s (%d)", this, usage));
        }
        return this;
    }


    /**
     * 
     */
    public void markClosed () {

    /**
     * Get transport connection
     * 
     * @param tc
     *            context to use
     * @param address
     * @param port
     * @param exclusive
     *            whether to acquire an unshared connection
     * @return a transport connection to the target
     */
    SmbTransport getSmbTransport ( CIFSContext tc, Address address, int port, boolean exclusive );


    /**

        release();
    }


    /**
     * @return tree handle with increased usage count
     */
    public SmbTreeHandleImpl acquire () {
        if ( this.usageCount.incrementAndGet() == 1 ) {
            this.treeConnection.acquire();
        }
        return this;
    }


    @Override
    public void release () {
        long us = this.usageCount.decrementAndGet();

    protected synchronized SmbFileHandleImpl ensureOpen () throws CIFSException {
        if ( !isOpen() ) {
            // one extra acquire to keep this open till the stream is released
            this.handle = this.file.openUnshared(this.openFlags, this.access, this.sharing, SmbConstants.ATTR_NORMAL, 0).acquire();
            if ( this.append ) {
                this.fp = this.handle.getInitialSize();
                if ( log.isDebugEnabled() ) {

     * <p>To avoid races between threads doing release and acquire, we transition to the final state
     * in two steps. One thread will successfully CAS from RUNNING to COMPLETING, that thread will
     * then set the result of the computation, and only then transition to COMPLETED, CANCELLED, or
     * INTERRUPTED.
     *
     * <p>We don't use the integer argument passed between acquire methods so we pass around a -1
     * everywhere.
     */

            }
            else {
                this.handle = this.file.openUnshared(this.openFlags, this.access, this.sharing, SmbConstants.ATTR_NORMAL, 0).acquire();
            }
            return this.handle;
        }
        return this.handle.acquire();
    }


    protected static IOException seToIoe ( SmbException se ) {
        IOException ioe = se;
        Throwable root = se.getCause();

		// 3) lk3 or lk4 (whichever didn't execute in step 1) then executes and creates
		//    a new entry in lockMap and acquires a lock for the same resource.

		<-lk2ch
		lk3ok := <-lk3ch
		lk4ok := <-lk4ch

		if lk3ok && lk4ok {
			t.Fatalf("multiple locks acquired; iteration=%d, lk3=%t, lk4=%t", i, lk3ok, lk4ok)
		}
	}

	// ErrIsNotEmpty is returned when the buffer is not empty and not blocking.
	ErrIsNotEmpty = errors.New("ringbuffer is not empty")

	// ErrAcquireLock is returned when the lock is not acquired on Try operations.
	ErrAcquireLock = errors.New("unable to acquire lock")

	// ErrWriteOnClosed is returned when write on a closed ringbuffer.
	ErrWriteOnClosed = errors.New("write on closed ringbuffer")
)