Linux 快速用户态互斥锁例程。 linux2.5以上内核，支持Futex，对于刚接触的用户，使用起来非常麻烦，这部分源码，详尽的利用futex基础原理，进行了封装，并且给出了几个测试例子。-Fast User Mode Linux mutex locking routines. linux2.5 above kernel, support Futex, for the new to the user, is very cumbersome to use, this part of the