1 /****************************************************************************
3 * SciTech OS Portability Manager Library
5 * ========================================================================
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
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.
17 * The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc.
19 * The Initial Developer of the Original Code is SciTech Software, Inc.
20 * All Rights Reserved.
22 * ========================================================================
28 * Description: Test program to check the ability to install a C based
29 * keyboard interrupt handler.
31 * Functions tested: PM_setKeyHandler()
33 * PM_restoreKeyHandler()
36 ****************************************************************************/
42 volatile long count = 0;
44 #pragma off (check_stack) /* No stack checking under Watcom */
46 void PMAPI keyHandler(void)
49 PM_chainPrevKey(); /* Chain to previous handler */
57 printf("Program running in ");
58 switch (PM_getModeType()) {
60 printf("real mode.\n\n");
63 printf("16 bit protected mode.\n\n");
66 printf("32 bit protected mode.\n\n");
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).
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) {
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);