Re: Semaphores and threads anomaly and bug?

From: John M Collins
Date: Tue Nov 04 2003 - 13:10:55 EST

On Tuesday 04 November 2003 17:29, Linus Torvalds wrote:
> On Tue, 4 Nov 2003, John M Collins wrote:
> > I know this isn't defined anywhere but the seems to be an ambiguity and
> > discrepancy between versions of Unix and Linux over threads and
> > semaphores.
> >
> > Do the "SEM_UNDO"s get applied when a thread terminates or when the
> > "whole thing" terminates?
> It's entirely up to you. That's what CLONE_SYSVSEM is supposed to
> determine.
> However, CLONE_SYSVSEM is fairly recent, and I think you will need to use
> the new threading libraries to see it.


Could I possibly draw your attention to the other point I made about the
updating of "sempid" which does seem to be a mistake to me?

John Collins Xi Software Ltd
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