适用于嵌入式linux下的互斥锁源代码，绝对真实可用。非常有益-For embedded linux source code under the exclusive lock, absolute truth can be. Very useful

嵌入式实际一个密码锁，实现了密码锁的基本功能，这是一个源程序，能够使用-Embedded real a password lock, to achieve the basic password lock function, this is a source code, can be used