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Date: Sun, 6 Jan 2002 16:40:46 -0600
From: Alfred Perlstein <bright@mu.org>
To: Archie Cobbs <archie@dellroad.org>
Cc: Dan Eischen <eischen@vigrid.com>, arch@FreeBSD.ORG
Subject: Re: Request for review: getcontext, setcontext, etc
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References: <20020106032709.A82406@elvis.mu.org> <200201062000.g06K0La35178@arch20m.dellroad.org>
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* Archie Cobbs <archie@dellroad.org> [020106 14:09] wrote:
> Alfred Perlstein writes:
> > > Is there a reason that getcontext and setcontext need to be
> > > system calls?
> > 
> > Atomicity?
> 
> That can't be why.. otherwise this would imply that just because
> something is written in assembly instead of C that it could have
> atomicity problems.
> 
> BTW, I think this adding these is a great idea.. e.g., the pth port
> can take advantage of these as well.

http://www.opengroup.org/onlinepubs/007908799/xsh/ucontext.h.html

Defines a signal mask switchover, that's why I assumed some degree
of atomicity help from the kernel.

-- 
-Alfred Perlstein [alfred@freebsd.org]
'Instead of asking why a piece of software is using "1970s technology,"
 start asking why software is ignoring 30 years of accumulated wisdom.'
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