Path: utzoo!mnetor!uunet!lll-winken!lll-lcc!mordor!sri-spam!rutgers!rochester!udel!burdvax!sdcrdcf!trwrb!trwspf!knurlin
From: knurlin@trwspf.TRW.COM (Scott Karlin)
Newsgroups: comp.sys.amiga
Subject: Cause() problem solved.
Message-ID: <699@trwspf.TRW.COM>
Date: 3 Feb 88 19:10:06 GMT
Reply-To: knurlin@trwspf.UUCP (Scott Karlin)
Distribution: na
Organization: TRW - Data Systems Lab., Redondo Beach, CA
Lines: 58

A few weeks ago, I posted a question about using
the Cause() function to generate an interrupt.
For those of you who might be interested there
were two problems: (1) NT_SOFTINT should be changed
to NT_INTERRUPT and (2) the compiler was too smart
for my own good (the compiler saw that abort was
always 0 so it didn't bother to test it each time
through the loop).  Here is the corrected code:


#include <exec/types.h>
#include <exec/interrupts.h>
#include <stdio.h>

int abort;

/* Compile with Lattice 4.0 using -y -v options */

void main()
{
   struct Interrupt interrupt;
   int aborttest();                    /* new */
   void InterruptCode();

   abort = 0;

   interrupt.is_Node.ln_Type = NT_INTERRUPT;     /* was NT_SOFTINT */
   interrupt.is_Node.ln_Pri  = 0;
   interrupt.is_Node.ln_Name = "test";
   interrupt.is_Code         = InterruptCode;

   Cause(&interrupt);
   while(aborttest() == 0)             /* aborttest() was abort */
      {
         printf(".");
         Delay(50);
      }
   printf("abort = 1\n");
   return;
}

int aborttest()                       /* new subroutine */
{
   return(abort);
}

void InterruptCode()
{
   abort = 1;
   return;
}



-- 
-- Scott Karlin
   TRW, Bldg O2-1761, One Space Park, Redondo Beach, CA 90278
   USENET:  knurlin@trwspf.trw.com     Phone:  (213) 535-3785
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