Philippe Gerum wrote:
> On Tue, 2011-02-08 at 13:16 +0100, Gilles Chanteperdrix wrote:
>> I was not talking about the Xenomai case specifically, but since Henri
>> would like to have the full signals implementation with Xenomai, this
>> does a apply to Xenomai too.
>>
>>
>
> I think we all agree that having a complete signal implementation for
> Xenomai in pure rt mode won't happen overnight. So the point is now: how
> could it be mimicked, at least for the most useful part.
>
My point is that whatever you do, a switch user-kernel, then kernel-user
is not going to be lightweight, so avoiding it in the application in the
first place may be a better idea.
My aim with implementing complete signals was rather for things like
timer_* and mq_notify, where the interface requires them, I did not even
imagine implementing SIGFPE, SIGILL, SIGTRAP, which I thought could not
be time critical anyway, for the reasons explained earlier. So, my
question (rather to Henri) is: what would we need SIGFPE, SIGILL,
SIGTRAP in an real-time application for?
--
Gilles.
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