// Place Rendezvous test code inside of the Rendezvous class.

    public static void rendezTest1() {
	final Rendezvous r = new Rendezvous();

	KThread t1 = new KThread( new Runnable () {
		public void run() {
		    int tag = 0;
		    int send = -1;

		    System.out.println ("Thread " + KThread.currentThread().getName() + " exchanging " + send);
		    int recv = r.exchange (tag, send);
		    Lib.assertTrue (recv == 1, "Was expecting " + 1 + " but received " + recv);
		    System.out.println ("Thread " + KThread.currentThread().getName() + " received " + recv);
		}
	    });
	t1.setName("t1");
	KThread t2 = new KThread( new Runnable () {
		public void run() {
		    int tag = 0;
		    int send = 1;

		    System.out.println ("Thread " + KThread.currentThread().getName() + " exchanging " + send);
		    int recv = r.exchange (tag, send);
		    Lib.assertTrue (recv == -1, "Was expecting " + -1 + " but received " + recv);
		    System.out.println ("Thread " + KThread.currentThread().getName() + " received " + recv);
		}
	    });
	t2.setName("t2");

	t1.fork(); t2.fork();
	// assumes join is implemented correctly
	t1.join(); t2.join();
    }

    // Invoke Rendezvous.selfTest() from ThreadedKernel.selfTest()

    public static void selfTest() {
	// place calls to your Rendezvous tests that you implement here
	rendezTest1();
    }