Path: news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail
From: "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com>
Newsgroups: comp.lang.c
Subject: Re: Python recompile
Date: Fri, 14 Mar 2025 19:35:32 -0700
Organization: A noiseless patient Spider
Lines: 15
Message-ID: <vr2p1k$2hq49$3@dont-email.me>
References: <vq1qas$j22$1@gallifrey.nk.ca> <vqm0b9$179ca$1@dont-email.me>
 <vqnfvp$1gsl4$2@dont-email.me> <20250310135828.116@kylheku.com>
 <vqnkdq$1gsl4$6@dont-email.me> <vqnmbn$1i1s0$6@dont-email.me>
 <vqnmig$1ie8j$2@dont-email.me> <vqns51$1jibk$5@dont-email.me>
 <vqo5hd$1lant$1@dont-email.me> <vqo9df$1ls6a$2@dont-email.me>
 <vqoe8o$1qblf$1@dont-email.me> <vqolqv$1rfnf$5@dont-email.me>
 <vqq8v2$262gq$1@dont-email.me> <vqqf3r$273mt$6@dont-email.me>
 <vqqjra$286h8$2@dont-email.me> <vqqlff$28fls$7@dont-email.me>
 <vqqtjv$2a3dv$1@dont-email.me> <vqqu21$2a18r$3@dont-email.me>
 <vqr25u$2eit2$1@dont-email.me> <vqras6$2fsqk$1@dont-email.me>
 <vqtq8v$33itc$1@dont-email.me> <vqvfl6$3rsid$2@dont-email.me>
 <vqvqmq$49pc$1@dont-email.me> <vr01sp$9jrt$2@dont-email.me>
 <vr212d$1uc77$1@dont-email.me> <vr26ih$23hho$1@dont-email.me>
 <vr299n$25gok$1@dont-email.me> <vr2ckr$2872d$2@dont-email.me>
 <vr2dts$29d9l$1@dont-email.me> <vr2e4v$29d9l$2@dont-email.me>
 <vr2oqr$2hjmt$4@dont-email.me>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Injection-Date: Sat, 15 Mar 2025 03:35:33 +0100 (CET)
Injection-Info: dont-email.me; posting-host="f54594f8eb80134925da391bfb78d663";
	logging-data="2680969"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX19W5fvfsQXBnTCu9+7ZujkQNbYSQ5C8r00="
User-Agent: Mozilla Thunderbird
Cancel-Lock: sha1:NQWg5anZvzOSjCudiCGmNOYkSoA=
Content-Language: en-US
In-Reply-To: <vr2oqr$2hjmt$4@dont-email.me>

On 3/14/2025 7:31 PM, Lawrence D'Oliveiro wrote:
> On Fri, 14 Mar 2025 16:29:34 -0700, Chris M. Thomasson wrote:
> 
>> There is a way to tell IOCP to do a so-called "zero byte
>> receive" where it does not use any non-paged memory for the receive
>> buffer because it's zero. Then when IOCP completes it means you are
>> guaranteed a non-blocking receive call, pretty nice!
> 
> Not sure why you need such a roundabout trick just to get a nonblocking
> version of an I/O call.

Well, ideally this would be a last resort, so to speak. When the system 
is under moderate load, we would use multiple overlapped WSARecv's and 
WSASend's. However, when things got a bit tight, switch to the 
zero-byte-receive trick that I learned about many moons ago.