board/MAI/bios_emulator/scitech/src/pm/tests/key.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 *               keyboard interrupt handler.
  30 *
  31 *               Functions tested:   PM_setKeyHandler()
  32 *                                   PM_chainPrevKey()
  33 *                                   PM_restoreKeyHandler()
  34 *
  35 *
  36 ****************************************************************************/
  37
  38 #include <stdlib.h>
  39 #include <stdio.h>
  40 #include "pmapi.h"
  41
  42 volatile long count = 0;
  43
  44 #pragma off (check_stack)           /* No stack checking under Watcom   */
  45
  46 void PMAPI keyHandler(void)
  47 {
  48     count++;
  49     PM_chainPrevKey();  /* Chain to previous handler    */
  50 }
  51
  52 int main(void)
  53 {
  54     int             ch;
  55     PM_lockHandle   lh;
  56
  57     printf("Program running in ");
  58     switch (PM_getModeType()) {
  59         case PM_realMode:
  60             printf("real mode.\n\n");
  61             break;
  62         case PM_286:
  63             printf("16 bit protected mode.\n\n");
  64             break;
  65         case PM_386:
  66             printf("32 bit protected mode.\n\n");
  67             break;
  68         }
  69
  70     /* Install our timer handler and lock handler pages in memory. It is
  71      * difficult to get the size of a function in C, but we know our
  72      * function is well less than 100 bytes (and an entire 4k page will
  73      * need to be locked by the server anyway).
  74      */
  75     PM_lockCodePages((__codePtr)keyHandler,100,&lh);
  76     PM_lockDataPages((void*)&count,sizeof(count),&lh);
  77     PM_installBreakHandler();           /* We *DONT* want Ctrl-Breaks! */
  78     PM_setKeyHandler(keyHandler);
  79     printf("Keyboard interrupt handler installed - Type some characters and\n");
  80     printf("hit ESC to exit\n");
  81     while ((ch = PM_getch()) != 0x1B) {
  82         printf("%c", ch);
  83         fflush(stdout);
  84         }
  85
  86     PM_restoreKeyHandler();
  87     PM_restoreBreakHandler();
  88     PM_unlockDataPages((void*)&count,sizeof(count),&lh);
  89     PM_unlockCodePages((__codePtr)keyHandler,100,&lh);
  90     printf("\n\nKeyboard handler was called %ld times\n", count);
  91     return 0;
  92 }