1/**
2 * Copyright(C) 1998
3 * All Rights Reserved. Salih Yurttas, ZCubes, BitsOfCode Software Systems, Inc..
4 *
5 * Permission to use, copy, modify, and distribute this
6 * software and its documentation for EDUCATIONAL purposes
7 * and without fee is hereby granted provided that this
8 * copyright notice appears in all copies.
9 *
10 * @date : January 1, 1998.
11 * @author : Salih Yurttas.
12 */
13
14
15public class Fork {
16
17 private boolean free = true;
18
19 public synchronized void pickUp() {
20 while(!free) {
21 try {
22 wait();
23 }
24 catch(Exception e) {
25 Thread.currentThread().stop();
26 }
27 }
28 free = false;
29 }
30
31 public synchronized void putDown() {
32 free = true;
33 notify();
34 }
35
36}