-
Notifications
You must be signed in to change notification settings - Fork 0
/
PingPongLock.java
63 lines (57 loc) · 1.25 KB
/
PingPongLock.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
54
55
56
57
58
59
60
61
62
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
public class PingPongLock {
private final int MAX = 10;
private volatile int counter = 0;
private Lock lock = new ReentrantLock();
private Condition pinged;
private Condition ponged;
public PingPongLock() {
pinged = lock.newCondition();
ponged = lock.newCondition();
}
public void ping() {
try {
lock.lock();
counter++;
System.out.println("Ping");
pinged.signalAll();
if (counter < MAX)
ponged.await();
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
lock.unlock();
}
}
public void pong() {
try {
lock.lock();
counter++;
System.out.println("Pong");
ponged.signalAll();
if (counter < MAX)
pinged.await();
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
lock.unlock();
}
}
public static void main(String[] args) {
final PingPongLock pingpong = new PingPongLock();
new Thread() {
public void run() {
while (pingpong.counter < pingpong.MAX)
pingpong.ping();
}
}.start();
new Thread() {
public void run() {
while (pingpong.counter < pingpong.MAX)
pingpong.pong();
}
}.start();
}
}