} finally {
                    releaseOwnership();
                }
            } finally {
                stateLock.unlock();
            }
        }
    }

    /**
     * Waits until the current thread can take ownership.
     * Must be called while holding the lock.
     */
    private void takeOwnership() {
        while (owner != null && owner != Thread.currentThread()) {
            try {

  }

  /**
   * Converts the given ThreadPoolExecutor into an ExecutorService that exits when the application
   * is complete. It does so by using daemon threads and adding a shutdown hook to wait for their
   * completion.
   *
   * <p>This method waits 120 seconds before continuing with JVM termination, even if the executor
   * has not finished its work.
   *

	bgwork <- func() {
		defer wg.Done()
		run(dir, CheckExit|ShowOutput|Background, cmd...)
	}
}

// bgwait waits for pending bgruns to finish.
// bgwait must be called from only a single goroutine at a time.
func bgwait(wg *sync.WaitGroup) {
	done := make(chan struct{})
	go func() {
		wg.Wait()
		close(done)
	}()
	select {
	case <-done:
	case <-dying:

			}
			continue
		case <-t.C:
			return fmt.Errorf("timeout, still waiting for update for %v", want)
		}
	}
}

// Wait for an updates for all the specified types
// If updates is empty, this will wait for any update
func (a *ADSC) Wait(to time.Duration, updates ...string) ([]string, error) {
	t := time.NewTimer(to)
	want := sets.New[string](updates...)
	got := make([]string, 0, len(updates))

	The '->' token (like in 'ls -l' output on Unix) is required.

wait 
	wait for completion of background commands

	Waits for all background commands to complete.
	The output (and any error) from each command is printed to
	the log in the order in which the commands were started.
	After the call to 'wait', the script's stdout and stderr
	buffers contain the concatenation of the background

// with its current contents.
//
// If the script completed successfully, HandleScript invokes f on the handler
// with the script's result still read-locked, and waits for it to return. (That
// ensures that cache invalidation does not race with an in-flight handler.)
//
// Otherwise, HandleScript returns the (cached) error from executing the script.

	}
	c.handshakeFn = c.clientHandshake
	return c
}

// A listener implements a network listener (net.Listener) for TLS connections.
type listener struct {
	net.Listener
	config *Config
}

// Accept waits for and returns the next incoming TLS connection.
// The returned connection is of type *Conn.
func (l *listener) Accept() (net.Conn, error) {
	c, err := l.Listener.Accept()
	if err != nil {
		return nil, err
	}

	_ = wait.PollImmediateUntil(1*time.Minute, func() (bool, error) {
		c.queue.Add(keyFn())
		return false, nil
	}, ctx.Done())

	// wait until we're told to stop
	<-ctx.Done()
}

func (c *Controller) runWorker() {
	// hot loop until we're told to stop.  processNextWorkItem will automatically wait until there's work
	// available, so we don't worry about secondary waits

	// wait to force acquire leadership. This is measured against time of
	// last observed ack.
	//
	// A client needs to wait a full LeaseDuration without observing a change to
	// the record before it can attempt to take over. When all clients are
	// shutdown and a new set of clients are started with different names against
	// the same leader record, they must wait the full LeaseDuration before

		r.writeCond.Broadcast()
	}

	// Unlock the mutex so readers/writers can finish.
	r.mu.Unlock()
	r.wg.Wait()
	r.mu.Lock()
	r.r = 0
	r.w = 0
	r.err = nil
	r.isFull = false
}

// WriteCloser returns a WriteCloser that writes to the ring buffer.
// When the returned WriteCloser is closed, it will wait for all data to be read before returning.
func (r *RingBuffer) WriteCloser() io.WriteCloser {