生产者消费者模型，用c语言实现模拟内存管理中的生产者和消费者，实现用信号量和锁的使用方法-Model of producers and consumers, producers and consumers in the analog memory management using the c language, the use of semaphores and locks

nachos 系统下使用信号量和条件变量，锁实现对链表和缓冲区中信息的修改，确保线程的同步。-Under the nachos system using semaphores and condition variables, the lock list and buffer to achieve changes to the information, to ensure the synchronization of threads

基于RT_thread的线程间调度问题，运用信号量及互斥锁解决线程资源抢占问题(Producer consumer problem)