state(busy, numDaemons - busy)
    }

    void idle() {
        idle(numDaemons)
    }

    void idle(int idle) {
        state(numDaemons - idle, idle)
    }

    void stopped() {
        numDaemons = 0
        state(0, 0)
    }

    void state(int busy, int idle) {
        state(new DaemonsState(busy, idle))
    }

    void state(DaemonsState checkpointState) {

	ref [numSig]int64
	// Map channels to signals while the channel is being stopped.
	// Not a map because entries live here only very briefly.
	// We need a separate container because we need m to correspond to ref
	// at all times, and we also need to keep track of the *handler
	// value for a channel being stopped. See the Stop function.
	stopping []stopping
}

type stopping struct {
	c chan<- os.Signal

        e.message == 'Cannot create outgoing dispatch, as <hub> has been stopped.'
    }

    def "cannot add handler after stop started"() {
        when:
        hub.requestStop()
        hub.addHandler("channel", new Object())

        then:
        IllegalStateException e = thrown()
        e.message == 'Cannot add handler, as <hub> has been stopped.'
    }

    def "cannot add connection after stop started"() {

	12: "user defined signal 2",
	13: "broken pipe",
	14: "alarm clock",
	15: "terminated",
	16: "stack fault",
	17: "child exited",
	18: "continued",
	19: "stopped (signal)",
	20: "stopped",
	21: "stopped (tty input)",
	22: "stopped (tty output)",
	23: "urgent I/O condition",
	24: "CPU time limit exceeded",
	25: "file size limit exceeded",
	26: "virtual timer expired",
	27: "profiling timer expired",

   */
  @CanIgnoreReturnValue
  public Stopwatch stop() {
    long tick = ticker.read();
    checkState(isRunning, "This stopwatch is already stopped.");
    isRunning = false;
    elapsedNanos += tick - startTick;
    return this;
  }

  /**
   * Sets the elapsed time for this stopwatch to zero, and places it in a stopped state.
   *

    def fixture = new TestDeploymentFixture()

    def setup() {
        fixture.writeToProject(projectDir)
        buildTimeout = 30
    }

    def "deployment is stopped when continuous build is cancelled" () {
        when:
        runBuild(["runDeployment"]) {
            succeeds()
            def key = fixture.keyFile.text
            fixture.assertDeploymentIsRunning(key)

	12: "user defined signal 2",
	13: "broken pipe",
	14: "alarm clock",
	15: "terminated",
	16: "stack fault",
	17: "child exited",
	18: "continued",
	19: "stopped (signal)",
	20: "stopped",
	21: "stopped (tty input)",
	22: "stopped (tty output)",
	23: "urgent I/O condition",
	24: "CPU time limit exceeded",
	25: "file size limit exceeded",
	26: "virtual timer expired",
	27: "profiling timer expired",

            }
            if (numIncompatible > 0) {
                reasons.add(numIncompatible + " incompatible");
            }
            if (numStopped > 0) {
                reasons.add(numStopped + " stopped");
            }

            return STARTING_DAEMON_MESSAGE + ", "
                + Joiner.on(" and ").join(reasons) + " Daemon" + (totalUnavailableDaemons > 1 ? "s" : "")
                + NOT_REUSED_MESSAGE;

     * complete. Note that the action may have completed by the time this method returns.
     *
     * @throws IllegalStateException When this connection has been stopped or is stopping.
     */
    <T> void run(ConsumerAction<? extends T> action, ResultHandlerVersion1<? super T> handler);

    /**
     * Stops this connection, blocking until all operations on the connection have completed.

	if ready.check() {
		t.Errorf("unexpected ready state %v", ready.check())
	}
	// can not set to true if is stopped
	ready.set(true)
	if ready.check() {
		t.Errorf("unexpected ready state %v", ready.check())
	}
	err := ready.wait(context.Background())
	if err == nil {
		t.Errorf("expected error waiting on a stopped state")
	}
}

func Test_newReadyCancelPending(t *testing.T) {
	errCh := make(chan error, 10)