用以演示他提出的信号量机制。本作业要求设计在同一个进程地址空间内执行的两个线程。生产者线程生产物品，然后将物品放置在一个空缓冲区中供消费者线程消费。-For the presentation he made semaphore mechanism. Operational requirements of the design process in the same address space to implement the two threads. Thread the production