派生进程之间共享一个全局变量 [英] Sharing a global variable between forked processes

问题描述

我有一个全局变量，X.然后我叉，从孩子修改的X.我想这些变化在父显示出来，但我不希望父母要等上了孩子。

I have a global variable, X. I then fork and modify X from the child. I want those changes to show up in the parent, but I don't want the parent to have to wait on the child.

我怎样才能做到这一点？

How can I do this?

推荐答案

您需要把变量共享内存。有许多方法来创建共享内存。我可能只是使用 MMAP ，但你也可以看看 shmget的或的shm_open 。

You need to put the variable in shared memory. There are many ways to create shared memory. I'd probably just use mmap, but you could also check out shmget or shm_open.

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