说明：  操作系统课程设计，线程的实现，利用时间片给每个线程分配运行时间，并行运算，带有消息缓冲区，可以实现线程的死锁和激活，合作等功能
(Operating systems curriculum design, implementation of threads, the use of time slices to each thread run-time, parallel computing, with a message buffer, the thread can deadlock and activation, cooperation and other functions)