From:	"Martin Czamai" <M DOT Czamai AT peak-system DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Cannot use of LOCK_FUNCTION, END_OF_FUNCTION,... in classes?
Date:	Tue, 26 Sep 2000 16:14:36 +0200
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Damian Yerrick <Bullcr_pd_yerrick AT hotmail DOT comRemoveBullcr_p> schrieb in im
Newsbeitrag: tc71ts8ihcuan0s7nl6u336q6cm0kpsafr AT 4ax DOT com...
> On Tue, 26 Sep 2000 06:48:44 +0200, "Martin Czamai"
> <M DOT Czamai AT peak-system DOT com> wrote:
>
> >
> >Damian Yerrick <Bullcr_pd_yerrick AT hotmail DOT comRemoveBullcr_p> schrieb in
im
> >Newsbeitrag: n8jvsskmu0b5sb4qa1f2uvheu1bcirjqf7 AT 4ax DOT com...
> >> On Mon, 25 Sep 2000 17:37:59 +0200, "Martin Czamai"
> >> <M DOT Czamai AT peak-system DOT com> wrote:
> >>
> >> >Hello,
> >> >
> >> >my problem is that I want to lock functions (like interrupt service
> >> >routines) using the END_OF_FUNCTION and LOCK_FUNCTION macros from
allegro
> >in
> >> >classes. This doesn't work because MYFUNCNAME_end is not a member of
> >> >MYCLASS. Any idea how to fix this problem?
> >> >Thanks in advance for your help
> >>
> >> If you're using a class method as an Allegro timer handler, make sure
> >> both the method and the END_OF_FUNCTION are static.
> >>
> >> static void Class::my_timer(void)
> >> {
> >>
> >> }
> >> static END_OF_FUNCTION(Class::my_timer);
> >
> >This doesn't work - the compiler returns the error message "cannot
declare
> >member function Class::mytimer() to have static linkage" :-((
>
> Been a while since I wrote C++.  Normally I stick to C or go all the
> way and use Java (veering offtopic...).
>
> >The intened purpose of the function i want to lock is the interrupt
service
> >routine of some piece of hardware.
> >Any idea again?
>
> I wouldn't use methods as timer handlers.  This isn't Java.
>
> Now I remember.  The 'static' keywords go in your class declaration:
> class Class
> {
>   ...
>   static void my_timer();
>   static END_OF_FUNCTION(my_timer);
>   ...
> }
> and leave static off the implementations.
>
> This might have _bad_ effects; I can't guarantee the performance of a
> method used as a timer handler.
>
> --
> <O
> ( \   GNOME vs. KDE: the game!
>  X    http://pineight.8m.com/nes.htm
>
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THANK YOU!

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