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面试官：你说说互斥锁、自旋锁、读写锁、悲观锁、乐观锁的应用场景
source link: https://database.51cto.com/art/202009/626231.htm
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多线程访问共享资源的时候，避免不了资源竞争而导致数据错乱的问题，所以我们通常为了解决这一问题，都会在访问共享资源之前加锁。
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