Fix windows 1022 error using multiple workers

[euri10]

Fixes #514 shamelessly inspired by hypercorn
Fixes #683 also

[cdeler]

May be I'm a newby, but I had to dig inside cpython source and msdn to realize why it works.

Specifying --workers <int> we enforce the server to use multiple workers processes spawning child processes. It's like a "pre-fork" mode, used, for example, by Apache web server: several child processes handles the same server socket. Unlike in *nix, the only way to share a socket between processes in Win is WSADuplicateSocket, called by sock.share().

It's what the PR did.

Let me left it there, just for the history :-)

Approved

[euri10]

Let me left it there, just for the history :-)

history thank you ! pretty amazing explanation, I didn't know all that

[bobfang1992]

When will this be released? Thanks!

[cdeler]

@bobfang1992 here is the release

#823

[bobfang1992]

awesome.

[qqletter]

I get the same error when use multiple workers on win11(22H2) and uvicorn 0.22.0