-
Notifications
You must be signed in to change notification settings - Fork 1
/
SlowCountDownLatch276Neo.java
53 lines (46 loc) · 1.35 KB
/
SlowCountDownLatch276Neo.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
public class SlowCountDownLatch276Neo {
public static void main(String args[]) throws Exception {
final CountDownLatch c = new CountDownLatch(10);
new Thread(new Runnable() {
@Override
public void run() {
while (c.getCount() > 0) {
System.out.println(c.getCount());
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
c.countDown();
}
}
}).start();
c.await();
System.out.println("Finished!");
}
public static class CountDownLatch {
private int count;
public CountDownLatch(int count) {
if (count < 0)
throw new IllegalArgumentException(count + " < 0");
this.count = count;
}
public void await() throws InterruptedException {
while (true) {
synchronized (this) {
if (count == 0) return;
wait(100);
}
}
}
public synchronized void countDown() {
if (count != 0) {
count--;
}
notifyAll();
}
public synchronized int getCount() {
return count;
}
}
}