对操作系统教学中进程同步与互斥的研究

Study on Course Synchronism and Exclusion in Operating System Teaching

操作系统进程间的同步与互斥关系一直是高校教学中的重点和难点。进程同步和互斥的实现机制有四种:信号量、管程、会合、分布式系统。信号量机制基本原理为两个或多个进程通过简单的信号申请和释放来合作,进程通过执行原语V(s)来释放信号,通过执行原语P(s)来申请信号。

The course synchronism and exclusion in operating system is always the emphasis and difficulty in college teaching.Its realizing system includes four kinds,signal,monitor,assemble and distributing system.The basic principle of signal mechanism is two or more courses apply and release for cooperation by simple signals.Course releases signal by carrying out original V（s）,and applies signal by carrying out original P（s）.