blob: dba88853c2f93bbd646b1ca736ab083a793251a6 [file] [log] [blame]
* 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
* 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
* keyboard interrupt handler.
* Functions tested: PM_setKeyHandler()
* PM_chainPrevKey()
* PM_restoreKeyHandler()
#include <stdlib.h>
#include <stdio.h>
#include "pmapi.h"
volatile long count = 0;
#pragma off (check_stack) /* No stack checking under Watcom */
void PMAPI keyHandler(void)
PM_chainPrevKey(); /* Chain to previous handler */
int main(void)
int ch;
PM_lockHandle lh;
printf("Program running in ");
switch (PM_getModeType()) {
case PM_realMode:
printf("real mode.\n\n");
case PM_286:
printf("16 bit protected mode.\n\n");
case PM_386:
printf("32 bit protected mode.\n\n");
/* Install our timer handler and lock handler pages in memory. It is
* difficult to get the size of a function in C, but we know our
* function is well less than 100 bytes (and an entire 4k page will
* need to be locked by the server anyway).
PM_installBreakHandler(); /* We *DONT* want Ctrl-Breaks! */
printf("Keyboard interrupt handler installed - Type some characters and\n");
printf("hit ESC to exit\n");
while ((ch = PM_getch()) != 0x1B) {
printf("%c", ch);
printf("\n\nKeyboard handler was called %ld times\n", count);
return 0;