RE: [ECOS] Wait on multiple objects

[Fabrice Gautier <Fabrice_Gautier at sdesigns dot com>]

Well, I can only wait on one flag object right?
So if i have two (or more) modules that i want to control with flags then
they have to share a common flag. That's what the implementation of pselect
does also with a conditonnal variable i believe.

This would work for my purpose so maybe that's what i end up doing. But i
was actually looking for a way to port some code that use select without
having to include the io packages. I figured out that what i was looking for
was a wait on multiple objects.

I guess there's not such thing yet in eCos. The principle to implement this
kind of feature look pretty simple, but i guess it would also be easy to
have many race conditions and other problems in the actual
implementation....

-- 
Fabrice Gautier, 
Fabrice_Gautier at sdesigns dot com


> -----Original Message-----
> From: Jonathan Larmour [mailto:jifl at eCosCentric dot com]
> Sent: Wednesday, February 19, 2003 7:14 AM
> To: Fabrice Gautier
> Cc: Ecos-List (E-mail)
> Subject: Re: [ECOS] Wait on multiple objects
> 
> 
> Fabrice Gautier wrote:
> > Hi,
> > 
> > I'm looking for a way to wait on multiple object, for 
> example multiple
> > conditionnal variables. Something that would provide a 
> functionality similar
> > to select. 
> > 
> > The thing is i dont want to include all the io packages 
> just to use select.
> > I've looked at how the pselect implementation is done, but 
> i'm a bit puzzled
> > since it seems  pselect wait on only one object.
> > 
> > Is there any (easy) way to do something that looks like 
> wait queues ?
> 
> What about flags?
> 
> Jifl
> -- 
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