linux下邮箱方式进行进程通信的代码和实验报告，用P.V原语实现通信中的同步问题。运用生产者与消费者模型设计实现一个简单的信箱。-approach to the process under linux mail communications code and test reports, using PV primitives to achieve communication in the synchronization problem. The use of producer and consumer model design to achieve a simple mailbox.