阻塞系统调用＆QUOT;？;什么是＆QUOT意思 [英] What is meant by "blocking system call"?

问题描述

什么是堵系统调用的含义是什么？

What is the meaning of "blocking system call"?

在我的操作系统当然，我们正在研究多线程编程。我不能确定，当我在我的课本读，它可以让另一个线程运行时一个线程进行阻塞系统调用是什么意思

In my operating systems course, we are studying multithreaded programming. I'm unsure what is meant when I read in my textbook "it can allow another thread to run when a thread make a blocking system call"

推荐答案

一个拦截系统调用是一个必须等​​到动作就可以完成。 阅读（）将是一个很好的例子 - 如果没有输入准备好了，它会坐在那里，等待某些被（前提是你有没有把它设置为非阻塞当然，在这种情况下，它不会是一个阻塞系统调用）。很显然，当一个线程在一个阻塞系统呼叫等待，另一个线程可以关闭做别的事情。

A blocking system call is one that must wait until the action can be completed. read() would be a good example - if no input is ready, it'll sit there and wait until some is (provided you haven't set it to non-blocking, of course, in which case it wouldn't be a blocking system call). Obviously, while one thread is waiting on a blocking system call, another thread can be off doing something else.

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