From: Fernando <postmaster AT 127 DOT 0 DOT 0 DOT 1>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: ctrl-c handling question
Date: Wed, 28 Jan 1998 16:49:35 -0500
Organization: My own
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hmmm, interesting, but now, what happens with this small program:

#define    TRUE    1

int main(void)
{
int    i = 1 ;

    while (i == TRUE)
        ;
}

and with this variant:

#define    TRUE    (1 == 1)

int main(void)
{
    while (TRUE)
        ;
}

Are they accesing memory ? I think the first one is doing it but I am
not sure about the second one.

Thanks.

Thomas Demmer wrote:

> That's a flaw? of the DPMI host. It can only intercept
> ^C when your program touches memory. In the first case it does,
> unless you use -O2 or so to compile it. In the second case,
> there is no need do access memory, everything is inside
> registers. So, the DPMI host never sees the ^C.
>
> I think there is no way to come around this.
>
> I had to trim your program a bit, otherwise my news host
> would not le me post it.
> --
> Ciao
> Tom
>
> *************************************************************
> * Thomas Demmer                                             *
> * Lehrstuhl fuer Stroemungsmechanik                         *
> * Ruhr-Uni-Bochum                                           *
> * Universitaetsstr. 150                                     *
> * D-44780  Bochum                                           *
> * Tel: +49 234 700 6434                                     *
> * Fax: +49 234 709 4162                                     *
> * http://www.lstm.ruhr-uni-bochum.de/~demmer                *
> *************************************************************



--
These are my personal opinions.
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