212 lines
8.0 KiB
C
212 lines
8.0 KiB
C
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/****************************************************************************
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*
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* SciTech OS Portability Manager Library
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*
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* ========================================================================
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*
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* The contents of this file are subject to the SciTech MGL Public
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* License Version 1.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.scitechsoft.com/mgl-license.txt
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*
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* Software distributed under the License is distributed on an
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* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc.
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*
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* The Initial Developer of the Original Code is SciTech Software, Inc.
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* All Rights Reserved.
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*
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* ========================================================================
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*
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* Language: ANSI C
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* Environment: Real mode and 16/32 bit Protected Mode
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*
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* Description: Header file for the interrupt handling extensions to the OS
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* Portability Manager Library. These extensions includes
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* simplified interrupt handling, allowing all common interrupt
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* handlers to be hooked and handled directly with normal C
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* functions, both in 16 bit and 32 bit modes. Note however that
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* simplified handling does not mean slow performance! All low
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* level interrupt handling is done efficiently in assembler
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* for speed (well actually necessary to insulate the
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* application from the lack of far pointers in 32 bit PM). The
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* interrupt handlers currently supported are:
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*
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* Mouse (0x33 callback)
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* Timer Tick (0x8)
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* Keyboard (0x9 and 0x15)
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* Control C/Break (0x23/0x1B)
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* Critical Error (0x24)
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*
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****************************************************************************/
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#ifndef __PMINT_H
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#define __PMINT_H
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/*--------------------------- Macros and Typedefs -------------------------*/
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#ifdef __SMX32__
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/* PC interrupts (Ensure consistent with pme.inc) */
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#define PM_IRQ0 0x40
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#define PM_IRQ1 (PM_IRQ0+1)
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#define PM_IRQ6 (PM_IRQ0+6)
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#define PM_IRQ14 (PM_IRQ0+14)
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#endif
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/* Define the different types of interrupt handlers that we support */
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typedef uint (PMAPIP PM_criticalHandler)(uint axValue,uint diValue);
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typedef void (PMAPIP PM_breakHandler)(uint breakHit);
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typedef short (PMAPIP PM_key15Handler)(short scanCode);
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typedef void (PMAPIP PM_mouseHandler)(uint event, uint butstate,int x,int y,int mickeyX,int mickeyY);
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/* Create a type for representing far pointers in both 16 and 32 bit
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* protected mode.
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*/
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#ifdef PM386
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typedef struct {
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long off;
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short sel;
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} PMFARPTR;
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#define PMNULL {0,0}
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#else
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typedef void *PMFARPTR;
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#define PMNULL NULL
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#endif
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/*--------------------------- Function Prototypes -------------------------*/
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#ifdef __cplusplus
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extern "C" { /* Use "C" linkage when in C++ mode */
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#endif
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/* Routine to load save default data segment selector value into a code
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* segment variable, and another to load the value into the DS register.
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*/
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void PMAPI PM_loadDS(void);
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void PMAPI PM_saveDS(void);
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/* Routine to install a mouse interrupt handling routine. The
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* mouse handler routine is a normal C function, and the PM library
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* will take care of passing the correct parameters to the function,
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* and switching to a local stack.
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*
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* Note that you _must_ lock the memory containing the mouse interrupt
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* handler with the PM_lockPages() function otherwise you may encounter
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* problems in virtual memory environments.
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*/
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int PMAPI PM_setMouseHandler(int mask,PM_mouseHandler mh);
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void PMAPI PM_restoreMouseHandler(void);
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/* Routine to reset the mouse driver, and re-install the current
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* mouse interrupt handler if one was currently installed (since the
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* mouse reset will automatically remove this handler.
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*/
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void PMAPI PM_resetMouseDriver(int hardReset);
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/* Routine to reset the mouse driver, and re-install the current
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* mouse interrupt handler if one was currently installed (since the
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* mouse reset will automatically remove this handler.
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*/
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void PMAPI PM_resetMouseDriver(int hardReset);
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/* Routines to install and remove timer interrupt handlers.
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*
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* Note that you _must_ lock the memory containing the interrupt
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* handlers with the PM_lockPages() function otherwise you may encounter
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* problems in virtual memory environments.
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*/
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void PMAPI PM_setTimerHandler(PM_intHandler ih);
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void PMAPI PM_chainPrevTimer(void);
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void PMAPI PM_restoreTimerHandler(void);
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/* Routines to install and keyboard interrupt handlers.
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*
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* Note that you _must_ lock the memory containing the interrupt
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* handlers with the PM_lockPages() function otherwise you may encounter
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* problems in virtual memory environments.
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*/
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void PMAPI PM_setKeyHandler(PM_intHandler ih);
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void PMAPI PM_chainPrevKey(void);
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void PMAPI PM_restoreKeyHandler(void);
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/* Routines to hook and unhook the alternate Int 15h keyboard intercept
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* callout routine. Your event handler will need to return the following:
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*
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* scanCode - Let the BIOS process scan code (chains to previous handler)
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* 0 - You have processed the scan code so flush from BIOS
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*
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* Note that this is not available under all DOS extenders, but does
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* work under real mode, DOS4GW and X32-VM. It does not work under the
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* PowerPack 32 bit DOS extenders. If you figure out how to do it let us know!
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*/
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void PMAPI PM_setKey15Handler(PM_key15Handler ih);
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void PMAPI PM_restoreKey15Handler(void);
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/* Routines to install and remove the control c/break interrupt handlers.
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* Interrupt handling is performed by the PM/Pro library, and you can call
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* the supplied routines to test the status of the Ctrl-C and Ctrl-Break
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* flags. If you pass the value TRUE for 'clearFlag' to these routines,
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* the internal flags will be reset in order to catch another Ctrl-C or
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* Ctrl-Break interrupt.
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*/
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void PMAPI PM_installBreakHandler(void);
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int PMAPI PM_ctrlCHit(int clearFlag);
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int PMAPI PM_ctrlBreakHit(int clearFlag);
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void PMAPI PM_restoreBreakHandler(void);
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/* Routine to install an alternate break handler that will call your
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* code directly. This is not available under all DOS extenders, but does
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* work under real mode, DOS4GW and X32-VM. It does not work under the
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* PowerPack 32 bit DOS extenders. If you figure out how to do it let us know!
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*
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* Note that you should either install one or the other, but not both!
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*/
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void PMAPI PM_installAltBreakHandler(PM_breakHandler bh);
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/* Routines to install and remove the critical error handler. The interrupt
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* is handled by the PM/Pro library, and the operation will always be failed.
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* You can check the status of the critical error handler with the
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* appropriate function. If you pass the value TRUE for 'clearFlag', the
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* internal flag will be reset ready to catch another critical error.
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*/
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void PMAPI PM_installCriticalHandler(void);
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int PMAPI PM_criticalError(int *axValue, int *diValue, int clearFlag);
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void PMAPI PM_restoreCriticalHandler(void);
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/* Routine to install an alternate critical handler that will call your
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* code directly. This is not available under all DOS extenders, but does
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* work under real mode, DOS4GW and X32-VM. It does not work under the
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* PowerPack 32 bit DOS extenders. If you figure out how to do it let us know!
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*
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* Note that you should either install one or the other, but not both!
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*/
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void PMAPI PM_installAltCriticalHandler(PM_criticalHandler);
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/* Functions to manage protected mode only interrupt handlers */
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void PMAPI PM_getPMvect(int intno, PMFARPTR *isr);
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void PMAPI PM_setPMvect(int intno, PM_intHandler ih);
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void PMAPI PM_restorePMvect(int intno, PMFARPTR isr);
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#ifdef __cplusplus
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} /* End of "C" linkage for C++ */
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#endif
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#endif /* __PMINT_H */
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