说明：  用多进程同步方法解决生产者——费者问题 设计目的：通过研究Linux 的进程机制和信号量实现生产者消费者问题的并发控制. 说明：有界缓冲区内设有20个存储单元，放入/取出的数据项设定为1-20这20个整型数. 设计要求： (1)每个生产者和消费者对有界缓冲区进行操作后，即时显示有界缓冲区的全部内容，当前指针位置和生产者/消费者县城的标识符. (2)生产者和消费者各有两个以上. (3)多个生产者或多个消费者之间须有共享对缓冲区进行操作的函数代码.
(Multi-process synchronization solution to the producer- the issue of fees is designed to: Linux by studying the process of the mechanism and signal volume producers realize concurrency control on consumer issues. Description: Bounded buffer zone there are 20 storage units, Add/Remove the data item is set to 1-20 this 20 integer. design requirements: (1) Each producer and consumer sector of the buffer zone have to operate immediately after showing the entire contents of the buffer zone community, current pointer location and producer/consumer identifier county. (2) producers and consumers have more than two. (3) or more consumers than producers have to be shared between the conduct of the buffer zone a function of the operation code.)