cas 不加锁也能保证线程安全这句话有错吗? - V2EX
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jsdi
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cas 不加锁也能保证线程安全这句话有错吗?

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  •   jsdi 2022-03-24 16:39:52 +08:00 1356 次点击
    这是一个创建于 1297 天前的主题,其中的信息可能已经有所发展或是发生改变。
    今天面试提到了 cas ,我说 cas 是通过乐观锁的机制,不加锁也可以保证线程安全。说完面试官明显嗤笑了一声,说你要是这么理解 balabala ,我这么理解有问题吗?
    越想越气,迟到就算了面试还各种瞧不起人,最后也没让反问,我答完也一点反馈没有直接跳下一个
    yzbythesea
        1
    yzbythesea  
       2022-03-24 17:12:58 +08:00
    cas 是 compare and swap ,哪里有锁?只是取了这个名字代称。。。感觉不加锁的 cas 没有这个说法吧。
    anonymousar
        2
    anonymousar  
       2022-03-24 17:19:56 +08:00
    他可能想说 总线锁
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