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Re: New POSIX semaphore functionality
On Mon, Oct 27, 2003 at 11:35:27PM +1100, Robert Collins wrote:
> On Mon, 2003-10-27 at 23:32, Corinna Vinschen wrote:
> > IMHO it would be a pity to require cygserver for POSIX semaphores.
> > Except for sem_unlink(), every other functionality neatly matches
> > what is allowed by Windows. Perhaps we should implement sem_unlink()
> > so that it just returns -1 and sets errno to ENOSYS for now.
>
> Well, I don't see the cygserver as a bad thing - setup as a service,
> it's no more intrusive that RPCSS, for instance.
It's not a bad thing, but it's a bad thing to require an additional
running service for stuff which could be implemented without it.
POSIX semaphores are such a thing.
> And for the semaphores, what I was thinking was that the cygserver
> allocates anonymous semaphores, handing out the handles - not that the
> cygserver would be used for each and every call.
Which is not required. Anonymous POSIX semaphores are working fine,
don't they? Only named semaphores and only together with sem_unlink()
are a problem.
XSI semaphores are an entirely different problem, of course.
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
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