Re: [Xenomai-help] xn_pipe_create [minor]

[Philippe Gerum <rpm@xenomai.org>]

Dmitry Adamushko wrote:
> Ignacio García Pérez <iggarpe@domain.hid> wrote on 14.11.2005 17:41:13:
> 
>  >
>  > >> Using this scheme, user mode programs just need to open()
>  > >> /proc/xenomai/registry/pipes/whatever to access a named pipe, without
>  > >> having to know the minor number.
>  > >>
>  > >> Under these circumstances, it would be *very* useful to have
>  > >> rt_pipe_create choose an unused minor automagically (for example 
> passing
>  > >> -1 as the minor).
> 
> ah.. yep, that's what I have meant with a PIPE_MINOR_AUTO thing :)
> 
>  > >>
>  > >
>  > > Sounds reasonable.
>  >
>  > On the heels of our abs/rel discussion, I suggest to use a #define
>  > istead of -1
>  >
>  > Will you implement it, or should I give a try?
>  >
> 
> If you want to have some fun (and you have some time and desire for 
> that) then go ahead :) Otherwise, no problem, I'll do that.
> 

Please make sure to implement this at the nucleus level, and if using a bitmap 
to locate free/busy slots, it should be large enough to handle FDSETSIZE 
channels, not BITS_PER_LONG.

-- 

Philippe.