`
package spin;
import java.util.concurrent.atomic.AtomicReference;
public class spinDemo {
AtomicReference<Thread> atomicReference = new AtomicReference<>();
//加锁
public void myLock(){
Thread thread = Thread.currentThread();
//重点 使用CAS
while (!atomicReference.compareAndSet(null, thread)){
System.out.println(Thread.currentThread().getName()+"\t想拿到锁");
}
System.out.println(Thread.currentThread().getName()+"\t拿到锁");
}
//解锁
public void myUnLock(){
Thread thread = Thread.currentThread();
System.out.println(Thread.currentThread().getName()+"\t解锁");
atomicReference.compareAndSet(thread, null);
}
}
`
