进程同步问题中双重作用信号量的选择

Choice of double function signal quantity in the synchronous question of the process

进程的同步和互斥历来是操作系统课程的一个难点和重点 ,本文主要讨论操作系统中进程的同步与互斥实现中信号量的选择问题 。

The synchronism and mutual exclusion of the process have always been a difficult point and focal point of operating system course, This text discuss between synchronism and mutual exclusion signal choice issue of quantity in realizing of process of the operating system mainly, Especially under special circumstances have a choice of double function signal quantity.