From: Thomas Demmer <demmer AT LSTM DOT Ruhr-UNI-Bochum DOT De>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: ctrl-c handling question
Date: Wed, 28 Jan 1998 16:28:15 +0100
Organization: Lehrstuhl fuer Stroemungsmechanik
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Jerry van Dijk wrote:
> When running the following program:
>         int main(void){
>                 int i;
>                 i = 5;
>                 while (i == 5) {;}
> 
>                 return 0;
>         }
> pressing CTRL-C will abort it.
> However, when running the following program:
> 
>         int main(void)
>         {
>                 while (1) {
>                 }
>         } 
> pressing CTRL-C has no effect.
> Anyone have any idea as to the cause and how to get around it ?
> 
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

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* Thomas Demmer                                             *
* Lehrstuhl fuer Stroemungsmechanik                         *
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