Eric Peterson wrote:
> On Thu, Dec 14, 2000 at 11:37:29AM -0500, Stephen D. Cohen wrote:
> > Hi,
> >
> > David Olofson offered an excellent treatise on why multiple open of a
> > FIFO is a bad idea. I would like to offer a fairly simple solution.
> >
> > Simply create a block of FIFOs on the RTL side of the house. Attach
> > them all to the same handler (it gets the FIFO number when it is
> > called, but since you were planning to multi-open, it probably doesn't
> > matter).
>
> > Then simply have your user-mode programs try opening FIFOs until they
> > succeed or run out of FIFOs to try.
>
> Steve,
>
> Thanks for the suggestion - I thought a bit about doing this, but it
> doesn't scale too well (n**2). Assuming I have a unique FIFO for each
> RT-task, and one for every Linux process, the number of FIFOs starts
> getting large.
>
> David O's suggestion of a message queue seems to be a good solution - now
> just to find one...
RTAI has a POSIX queues module, why not take a look at that?
Cheers
Trev
>
>
> Regards,
> Eric
>
> --
> God made everything out of nothing, but the nothingness shows through.
> -- Paul Valery
>
> Eric Peterson WB6PYK (805)370-3046 [EMAIL PROTECTED] HOME: [EMAIL PROTECTED]
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