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https://www.quora.com/How-are-mutexes-and-semaphores-different-with-respect-to-their-implementation-in-a-Linux-kernel
您即将离开知乎,请注意您的帐号和财产安全。
https://www.quora.com/How-are-mutexes-and-semaphores-different-with-respect-to-their-implementation-in-a-Linux-kernel