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/****************************************************************************
*
* SciTech OS Portability Manager Library
*
* ========================================================================
*
* The contents of this file are subject to the SciTech MGL Public
* License Version 1.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.scitechsoft.com/mgl-license.txt
*
* Software distributed under the License is distributed on an
* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc.
*
* The Initial Developer of the Original Code is SciTech Software, Inc.
* All Rights Reserved.
*
* ========================================================================
*
*
* Language: ANSI C
* Environment: any
*
* Description: Test program to check the ability to install a C based
* critical error handler.
*
* Functions tested: PM_installCriticalHandler()
* PM_criticalError()
* PM_restoreCriticalHandler()
*
*
****************************************************************************/
#include <stdlib.h>
#include <stdio.h>
#include "pmapi.h"
volatile uint criticalError = false;
volatile uint axValue;
volatile uint diValue;
#pragma off (check_stack) /* No stack checking under Watcom */
uint PMAPI criticalHandler(uint axVal,uint diVal)
{
criticalError = true;
axValue = axVal;
diValue = diVal;
return 3; /* Tell MS-DOS to fail the operation */
}
int main(void)
{
FILE *f;
printf("Program running in ");
switch (PM_getModeType()) {
case PM_realMode:
printf("real mode.\n\n");
break;
case PM_286:
printf("16 bit protected mode.\n\n");
break;
case PM_386:
printf("32 bit protected mode.\n\n");
break;
}
PM_installAltCriticalHandler(criticalHandler);
printf("Critical Error handler installed - trying to read from A: drive...\n");
f = fopen("a:\bog.bog","rb");
if (f) fclose(f);
if (criticalError) {
printf("Critical error occured on INT 21h function %02X!\n",
axValue >> 8);
}
else
printf("Critical error was not caught!\n");
PM_restoreCriticalHandler();
return 0;
}
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