Spin locks work well in cases where lock durations are very short.

当锁被占有的时间很短时，自旋锁的效果非常好。

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Furthermore, we can define as many spin locks as we want, to guard as many Shared resources as we want.

另外，我们可以定义我们想要的旋转锁数量，来守护我们想要得共享资源。

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While spin locks are CPU-intensive and appear inefficient, they can be more efficient than suspending the thread and subsequently waking it up if the lock in question is held for a very short time.

虽然旋转锁是cpu密集型的，显得效率低下，但是如果争夺的锁被持有的时间非常短，那么旋转锁要比暂挂线程然后再唤醒它更有效率。

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