C#+ =线程安全吗? [英] Is C# += thread safe?

问题描述

只需运行一个程序，在线程之间的共享变量上使用+ =，那么+ =线程安全吗，即原子地执行加法和赋值?

Just ran into a program where += is used on a shared variable among threads, so is += thread safe, i.e. performs addition and assignment atomically?

推荐答案

不，它不是线程安全的，因为它等效于:

No it isn't thread safe since it's equivalent to:

int temp = orig + value;
orig = temp;

您可以改用 Interlocked.Add :

You can use Interlocked.Add instead:

Interlocked.Add(ref orig, value);

这篇关于C#+ =线程安全吗?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！