用CAS思想实现一个自旋锁

public class SpinLockDemo {
    //原子引用线程
    AtomicReference<Thread> atomicReference = new AtomicReference<>();

    public void myLock() {
        Thread thread = Thread.currentThread();
        System.out.println(thread.getName() + "\t invoke myLock()");
        //模拟自旋
        while (!atomicReference.compareAndSet(null, thread)) {
        }
    }

    public void myUnlock() {
        Thread thread = Thread.currentThread();
        System.out.println(thread.getName() + "\t invoke myUnlock()");
        atomicReference.compareAndSet(thread, null);
    }

    public static void main(String[] args) throws InterruptedException {
        SpinLockDemo spinLockDemo = new SpinLockDemo();

        new Thread(() -> {
            spinLockDemo.myLock();
            try {
                TimeUnit.SECONDS.sleep(5);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            spinLockDemo.myUnlock();
        }, "t1").start();

        TimeUnit.SECONDS.sleep(1);

        new Thread(() -> {
            spinLockDemo.myLock();
            try {
                TimeUnit.SECONDS.sleep(1);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            spinLockDemo.myUnlock();
        }, "t2").start();
    }
}