forked from guanpengchn/java-concurrent-programming
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathBadSuspend.java
More file actions
34 lines (28 loc) · 992 Bytes
/
Copy pathBadSuspend.java
File metadata and controls
34 lines (28 loc) · 992 Bytes
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
package ch2;
public class BadSuspend {
public static Object u = new Object();
static ChangeObjectThread t1 = new ChangeObjectThread("t1");
static ChangeObjectThread t2 = new ChangeObjectThread("t2");
public static class ChangeObjectThread extends Thread{
public ChangeObjectThread(String name) {
super.setName(name);
}
public void run() {
synchronized (u){
System.out.println("in "+ getName());
Thread.currentThread().suspend();
}
}
}
// 导致resume不生效的执行顺序可能是这样的：
// 打印t1 => t1在suspend => t2等待u释放 => t1被resume => t2被resume => u释放打印t2 => t2被suspend => 永远无法结束
public static void main(String []args) throws InterruptedException {
t1.start();
Thread.sleep(100);
t2.start();
t1.resume();
t2.resume();
t1.join();
t2.join();
}
}