自己写的一个Lock 是否能锁住，有什么地方需要优化 ？？？

Question

代码如下

import java.util.Queue;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.locks.LockSupport;

public class MyLock {
    //用来表示当前线程是否获取锁 0 无锁 1 有锁
//    private volatile int state;
    private volatile static AtomicInteger state = new AtomicInteger(0);

    private Thread ownerThread;

    private volatile Queue<Thread> queue = new LinkedBlockingQueue<>();


    public void lock(){
        //如果当前state为0 则可以将state和当前线程绑定
        Thread thread = Thread.currentThread();
        if(state.compareAndSet(0,1)){
            ownerThread = thread;
        }else{
            for (;;){
                //挂起前 尝试再次获取
                if(state.compareAndSet(0,1)){
                    ownerThread = thread;
                    return;
                }

                if(queue.add(thread)){
                    //挂起
                    LockSupport.unpark(thread);
                    LockSupport.park();
                }

            }
        }
    }

    /**
     * 解锁
     */
    public void unlock(){
        if(state.compareAndSet(1,0)){
            ownerThread = null;//help GC
            Thread peek = queue.peek();
            if(peek != null){
                Thread head = queue.poll();
                LockSupport.unpark(head);
            }
        }

    }

}

Answer 1

不可重入，你试试同一个线程连续获取锁的场景，而且你的队列会无限增长