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From: Lawrence D'Oliveiro <ldo@nz.invalid>
Newsgroups: comp.lang.c
Subject: Re: Python recompile
Date: Wed, 12 Mar 2025 06:50:46 -0000 (UTC)
Organization: A noiseless patient Spider
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On Tue, 11 Mar 2025 21:22:22 -0700, Chris M. Thomasson wrote:

> On 3/11/2025 8:12 PM, Lawrence D'Oliveiro wrote:
>
>> On Tue, 11 Mar 2025 20:04:30 -0700, Chris M. Thomasson wrote:
>>
>>> IOCP works fine ...
>>
>> But not with pipes.
>
> Never tried them with pipes, only sockets.

The Python developers have tried. They ended up creating two event
loop implementations on Windows, neither of which quite covers all the
bases
<https://docs.python.org/3/library/asyncio-eventloop.html#event-loop-implementations>.

According to the platform support notes
<https://docs.python.org/3/library/asyncio-platforms.html>,
SelectorEventLoop can only handle sockets (and has a limit of 512 of
them), not pipes or subprocesses. ProactorEventLoop uses your
favourite IOCP, but does not allow the addition of reader/writer
callbacks for caller-supplied file descriptors.

Neither one supports signal handlers. And there seems to be no Windows
equivalent to Unix-style sockets.

So on Windows, it’s a question of choosing which one is the least bad
fit for your needs, and hoping you can make that work over your entire
program.