[issue21998] asyncio: support fork

[Yury Selivanov]

Yury Selivanov added the comment:

> I was thinking only in the child. The parent should be able to continue to use the loop as if the fork didn't happen, right?

Yes, everything should be fine.

I'll rephrase my question: do you think there is a way (and need) to at least throw a warning in the master process that the fork has failed (without monkey patching os.fork() which is not an option)?

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<http://bugs.python.org/issue21998>
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