Re: Ada.Interrpts.Names

[Simon Wright <simon@pushface.org>]

Simon Wright <simon@pushface.org> writes:

> lyttlec <lyttlec@removegmail.com> writes:
>
>> Under Ubuntu Linux kill -l lists interrupts including SIGRTMIN and
>> SIGRTMAX. However, gnat a-intnam.ads does not have these, nor does the
>> Ada ARM toolchain. Is there a way to use these interrupts?
>
> Looks as though Interrupt_ID is visibly a numeric type, so you could
> just use the number (so long as it's less than (what on Darwin is)
> System.OS_Interface.Max_Interrupt). Whether the RTS will actually
> respond to the signal in a useful way is another matter. Again,
> System.OS_Interface should offer a clue.

Via mail (better to use the newsgroup!) you said

> I tried that and the program in Chap.4 of "Building Parallel,
> Embedded, and Real-Time Applications with Ada" compiles.  The question
> is whether or not that is the only thing required to get a meaningful
> response?
> The "C" process is quiet complex.
> In Ada it looks like it might be as simple as editing a-intnam.ads,
> s-osinte.ads, and s-linux.ads. Or a lot more complex, like the methods
> for AVR-Ada.

I don't know, because I don't run Linux as my main development
environment.

Your best bet, I'd've thought, would be to write a very simple program
just to catch that signal (i.e. a PO interrupt handler) using the raw
integer and see if it works. If it doesn't, you'd probably have a long
row to hoe. If it does, you can consider whether it's worth the pain of
editing Ada.Interrupts.Names, otherwise, in your code, (e.g.)

   SIGRTMIN : constant Ada.Interrupts.Interrupt_ID := 42; -- or whatever