Mail Archives: cygwin-developers/2001/04/23/20:27:50
> -----Original Message-----
> From: Christopher Faylor [mailto:cgf AT redhat DOT com]
>
>
> On Tue, Apr 24, 2001 at 10:09:38AM +1000, Robert Collins wrote:
> >> -----Original Message-----
> >> From: Christopher Faylor [mailto:cgf AT redhat DOT com]
> >> On Mon, Apr 23, 2001 at 08:03:02PM -0400, John Fortin wrote:
> >>
> >> >> This would also be something that could be incorporated
> >> into Egor's daemon,
> >> >> too, if you've been following the discussion in
> cygwin-developers.
> >> >
> >> >I saw some general discussion, but I never quite got the
> >> jist of what the
> >> >daemon did..
> >> >
> >> >I saw that Robert Collins had been doing some investigating
> >> into the ipc
> >> >stuff. Do you know what his current status is...
> >>
> >> No, I don't. He was talking about implementing something but
> >> I'm sure he
> >> wouldn't mind collaborating.
I'm more than happy to collaborate on the remaining areas. They are
* Persistence.
* sem.h declared routines.
* msg.h declared routines.
> I guess we should move this discussion to cygwin-developers...
>
> John was asking for something interesting to do. He suggested POSIX
> IPC stuff, which I (possibly erroneously) assumed was the same as what
> cygipc provided.
It is. See http://www.opengroup.org/onlinepubs/7908799/xsh/ipc.html -
it's essential sysV IPC. To some extent these are equivalent to mmap and
the like, but I don't think mmap is cross process-persistent in cygwin
(And I don't know if it's meant to be). We could of course implement shm
with disk backing not VM backing, but that might cause issues with Gb
allocs :]
>
> At the time, I forgot that you were working on this already, Robert.
No probs. I only did it to allow testing of pshared mutexs!
Rob
>
> cgf
>
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