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Path: utzoo!utcs!mnetor!yetti!andrew
From: andrew@yetti.UUCP
Newsgroups: net.lang.prolog
Subject: A fix for C-Prolog Ctrl-C handler problem
Message-ID: <384@yetti.UUCP>
Date: Fri, 18-Jul-86 15:19:31 EDT
Article-I.D.: yetti.384
Posted: Fri Jul 18 15:19:31 1986
Date-Received: Fri, 18-Jul-86 19:19:36 EDT
Reply-To: andrew@yetti.UUCP (Andrew Rau-Chaplin)
Organization: York University Computer Science
Lines: 23

The control-C handler in C-PROLOG (V1.5) does not always function correctly.
Under some circumstances it does not interrupt the program flow and forces
one to control-Y out of the program.  Here is a fix for this problem.
We are not proud of it, but it works.
     
Replace the function called interrupt in the sysbits.c file with the following
function.
     
Interrupt()
{
        debug = TRUE;
        sklev = 1000000;
        signal(SIGINT,TakeSignal);
}
     
This function will take you immediately into the debugger upon using control-C.
From there you may abort or use any of the standard debug options.
     
     
				Andrew
				us: utzoo!yetti!andrew
				bi: andrew@yuyetti
				    project5@yusol