New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

关于map flags如何发现并发写问题 #75

Open

Whaleman55 opened this issue Sep 1, 2024 · 0 comments

Whaleman55 commented Sep 1, 2024

问题描述

map赋值时

函数首先会检查 map 的标志位 flags。如果 flags 的写标志位此时被置 1 了，说明有其他协程在执行“写”操作，进而导致程序 panic。这也说明了 map 对协程是不安全的。

但flags本身的线程/协程安全性如何保证呢？如果两个协程恰好同时进行写，flags此时还没有进入写状态，怎么办呢？

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment