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From: Lew Pitcher <lew.pitcher@digitalfreehold.ca>
Newsgroups: comp.unix.shell
Subject: Re: [OT] PIDs for Linux threads (was Re: pid ranges)
Date: Mon, 7 Oct 2024 16:47:26 -0000 (UTC)
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On Mon, 07 Oct 2024 18:29:00 +0200, Janis Papanagnou wrote:

> [ This is getting off-topic, sorry. ]
> 
> On 07.10.2024 15:31, Richard Kettlewell wrote:
>> 
>> _On Linux_ process IDs and thread IDs share the same number space which
>> changes the picture quite a bit: [...]
> 
> This is interesting.
> Since processes are handled by the OS kernel what does that imply...?
> A common process/thread interface in Linux?

Exactly.
In the early 2000's, the Linux kernel moved to supporting 1:1 threads,
and provided the NPTL ("Native Posix Threading Library") to provide the
POSIX application-level API to this new kernel capability.

> Is that defined by POSIX threads, or is it something specific?

It is how Linux implements the kernel-level responsibilities of POSIX
threads.

> Is there any good link to read more about that?

Plenty. Google "NPTL and Linux"

> (My thread times have long passed; I used it from C++, and there were
> a lot of things to consider when programming with threads back then.)
> 
> Janis




-- 
Lew Pitcher
"In Skills We Trust"