[OT] PIDs for Linux threads (was Re: pid ranges)

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

Is there any good link to read more about that?

(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