[issue35493] multiprocessing.Pool._worker_handler(): use SIGCHLD to be notified on worker exit

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

How do you use SIGCHLD on Windows?

There is actually a portable (and robust) solution: use Process.sentinel
https://docs.python.org/3/library/multiprocessing.html#multiprocessing.Process.sentinel

There is another issue: Pool is currently subclassed by ThreadPool. You'll probably have to make the two implementations diverge a bit.

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