自定义一个自旋锁并使用

package com.Lock;

import java.util.concurrent.atomic.AtomicReference;

/**
 * @author LZP
 * @create 2020/7/12
 * 自旋锁
 */
public class SpinLock {
    AtomicReference<Object> reference = new AtomicReference<>();
    //加锁
    public void myLock(){
        Thread thread = Thread.currentThread();
        System.out.println(Thread.currentThread().getName()+"这是我的加锁");
        while (!reference.compareAndSet(null,thread)){

        }
    }
    //解锁
    public void unMyLock(){
        Thread thread = Thread.currentThread();
        System.out.println(Thread.currentThread().getName()+"这是我的解锁");
        reference.compareAndSet(thread,null);
    }

}

package com.Lock;

import java.util.concurrent.TimeUnit;

/**
 * @author LZP
 * @create 2020/7/12
 * 自旋锁测试
 */
public class SpinLockTest {
    public static void main(String[] args) {
        SpinLock spinLock = new SpinLock();
        new Thread(()->{
            try {
                spinLock.myLock();
                Thread.sleep(2000);
            }catch (Exception e){
                e.printStackTrace();
            }finally {
                spinLock.unMyLock();
            }
        },"A1").start();

        try {
            TimeUnit.SECONDS.sleep(1);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        new Thread(()->{
            try {
                spinLock.myLock();
                Thread.sleep(2000);
            }catch (Exception e){
                e.printStackTrace();
            }finally {
                spinLock.unMyLock();
            }
        },"A2").start();

    }
}