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linux semaphore mutex

linux semaphore mutex

mutex和semaphore有什么区别呢？ mutex是用作互斥的，而semaphore是用作同步的。 也就是说，mutex的初始化一定是为1，而semaphore可以是任意的数， 所以如果使用mutex，那第一个进入临界区的进程一定可以执行，而其他的进程必须等待。

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