什么是Test-and-Set用于？ [英] What is Test-and-Set used for?

问题描述

阅读测试和设置后维基百科条目，我仍然是留下了一个问题什么是测试和设置？

After reading the Test-and-Set Wikipedia entry, I am still left with the question "What would a Test-and-Set be used for?"

我意识到可以使用它来实现Mutex（如维基百科所述）但是它有什么其他用途？

I realize that you can use it to implement Mutex (as described in wikipedia), but what other uses does it have?

推荐答案

您可以随时在数据写入数据后进行一些工作，确保自从您启动以来，另一个线程没有覆盖目的地。许多锁定/互斥锁算法需要这种形式。

You use it any time you want to write data to memory after doing some work and make sure another thread hasn't overwritten the destination since you started. A lot of lock/mutex-free algorithms take this form.

这篇关于什么是Test-and-Set用于？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！