board/MAI/bios_emulator/scitech/src/pm/tests/altcrit.c

   1 /****************************************************************************
   2 *
   3 *                   SciTech OS Portability Manager Library
   4 *
   5 *  ========================================================================
   6 *
   7 *    The contents of this file are subject to the SciTech MGL Public
   8 *    License Version 1.0 (the "License"); you may not use this file
   9 *    except in compliance with the License. You may obtain a copy of
  10 *    the License at http://www.scitechsoft.com/mgl-license.txt
  11 *
  12 *    Software distributed under the License is distributed on an
  13 *    "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
  14 *    implied. See the License for the specific language governing
  15 *    rights and limitations under the License.
  16 *
  17 *    The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc.
  18 *
  19 *    The Initial Developer of the Original Code is SciTech Software, Inc.
  20 *    All Rights Reserved.
  21 *
  22 *  ========================================================================
  23 *
  24 *
  25 * Language:     ANSI C
  26 * Environment:  any
  27 *
  28 * Description:  Test program to check the ability to install a C based
  29 *               critical error handler.
  30 *
  31 *               Functions tested:   PM_installCriticalHandler()
  32 *                                   PM_criticalError()
  33 *                                   PM_restoreCriticalHandler()
  34 *
  35 *
  36 ****************************************************************************/
  37
  38 #include <stdlib.h>
  39 #include <stdio.h>
  40 #include "pmapi.h"
  41
  42 volatile uint criticalError = false;
  43 volatile uint axValue;
  44 volatile uint diValue;
  45
  46 #pragma off (check_stack)           /* No stack checking under Watcom   */
  47
  48 uint PMAPI criticalHandler(uint axVal,uint diVal)
  49 {
  50     criticalError = true;
  51     axValue = axVal;
  52     diValue = diVal;
  53     return 3;       /* Tell MS-DOS to fail the operation */
  54 }
  55
  56 int main(void)
  57 {
  58     FILE    *f;
  59
  60     printf("Program running in ");
  61     switch (PM_getModeType()) {
  62         case PM_realMode:
  63             printf("real mode.\n\n");
  64             break;
  65         case PM_286:
  66             printf("16 bit protected mode.\n\n");
  67             break;
  68         case PM_386:
  69             printf("32 bit protected mode.\n\n");
  70             break;
  71         }
  72
  73     PM_installAltCriticalHandler(criticalHandler);
  74     printf("Critical Error handler installed - trying to read from A: drive...\n");
  75     f = fopen("a:\bog.bog","rb");
  76     if (f) fclose(f);
  77     if (criticalError) {
  78         printf("Critical error occured on INT 21h function %02X!\n",
  79             axValue >> 8);
  80         }
  81     else
  82         printf("Critical error was not caught!\n");
  83     PM_restoreCriticalHandler();
  84     return 0;
  85 }