Re: [ECOS] need cdl help

[Jonathan Larmour <jifl at eCosCentric dot com>]

Andrew Lunn wrote:
> On Wed, Apr 02, 2003 at 10:52:02AM +0200, Koeller, T. wrote:
>
> > Hi all,
> >
> > I have a question about the watchdog.cdl file located
> > in io/watchdog/current/cdl/watchdog.cdl:
> >
> > The interface CYGINT_WATCHDOG_IMPLEMENTATIONS has a
> > 'requires  1 == CYGINT_WATCHDOG_IMPLEMENTATIONS' constraint.
> > I would have expected to find this constraint at the package
> > level (since it is the package as a whole that requires exactly
> > one implementation), not with the interface itself.
>
>
> Im not a CDL expert....
>
> I don't think it makes a difference if the requires is inside the
> interface declaration or at the top of the package declaration. I
> think keeping it all together inside the interface declaration makes
> it easier to read, but thats a personal opinion.

Actually it is a bit of a mistake. When the interface has no 
implementations, the requires will have no effect because the interface 
will then be inactive (in the CDL sense). So in practice this would permit 
no watchdog implementations.

So in fact it should be in the package, not the interface. I'll change that.

Jifl
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