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1
4 package com.tc.util;
5
6 import com.tc.exception.TCRuntimeException;
7
8 public class Counter {
9 private int count;
10
11 public Counter() {
12 this(0);
13 }
14
15 public Counter(int initial) {
16 this.count = initial;
17 }
18
19 public int increment() {
20 return increment(1);
21 }
22
23 public synchronized int increment(int val) {
24 count += val;
25 notifyAll();
26 return count;
27 }
28
29 public int decrement() {
30 return decrement(1);
31 }
32
33 public synchronized int decrement(int val) {
34 count -= val;
35 notifyAll();
36 return count;
37 }
38
39 public synchronized int get() {
40 return count;
41 }
42
43 public synchronized void waitUntil(int value) {
44 while (this.count != value) {
45 try {
46 wait();
47 } catch (InterruptedException  e) {
48 throw new TCRuntimeException(e);
49 }
50 }
51 }
52 }
53 |
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