180 lines
4.0 KiB
C
Executable File
180 lines
4.0 KiB
C
Executable File
/*
|
|
Copyright (C) 1994-1995 Apogee Software, Ltd.
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; either version 2
|
|
of the License, or (at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
|
|
See the GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
|
*/
|
|
/**********************************************************************
|
|
module: DPMI.C
|
|
|
|
author: James R. Dose
|
|
date: April 8, 1994
|
|
|
|
Functions for performing DPMI calls.
|
|
|
|
(c) Copyright 1994 James R. Dose. All Rights Reserved.
|
|
**********************************************************************/
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include "dpmi.h"
|
|
|
|
#define TRUE ( 1 == 1 )
|
|
#define FALSE ( !TRUE )
|
|
|
|
/*---------------------------------------------------------------------
|
|
Function: DPMI_GetRealModeVector
|
|
|
|
Returns the vector of a real mode interrupt.
|
|
---------------------------------------------------------------------*/
|
|
|
|
unsigned long DPMI_GetRealModeVector
|
|
(
|
|
int num
|
|
)
|
|
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*---------------------------------------------------------------------
|
|
Function: DPMI_SetRealModeVector
|
|
|
|
Sets the vector of a real mode interrupt.
|
|
---------------------------------------------------------------------*/
|
|
|
|
void DPMI_SetRealModeVector
|
|
(
|
|
int num,
|
|
unsigned long vector
|
|
)
|
|
|
|
{
|
|
}
|
|
|
|
|
|
/*---------------------------------------------------------------------
|
|
Function: DPMI_CallRealModeFunction
|
|
|
|
Performs a call to a real mode function.
|
|
---------------------------------------------------------------------*/
|
|
|
|
int DPMI_CallRealModeFunction
|
|
(
|
|
dpmi_regs *callregs
|
|
)
|
|
|
|
{
|
|
return( DPMI_Ok );
|
|
}
|
|
|
|
|
|
/*---------------------------------------------------------------------
|
|
Function: DPMI_LockMemory
|
|
|
|
Locks a region of memory to keep the virtual memory manager from
|
|
paging the region out.
|
|
---------------------------------------------------------------------*/
|
|
|
|
int DPMI_LockMemory
|
|
(
|
|
void *address,
|
|
unsigned length
|
|
)
|
|
|
|
{
|
|
return ( DPMI_Ok );
|
|
}
|
|
|
|
|
|
/*---------------------------------------------------------------------
|
|
Function: DPMI_LockMemoryRegion
|
|
|
|
Locks a region of memory to keep the virtual memory manager from
|
|
paging the region out.
|
|
---------------------------------------------------------------------*/
|
|
|
|
int DPMI_LockMemoryRegion
|
|
(
|
|
void *start,
|
|
void *end
|
|
)
|
|
|
|
{
|
|
int status;
|
|
|
|
status = DPMI_LockMemory( start, ( char * )end - ( char * )start );
|
|
|
|
return( status );
|
|
}
|
|
|
|
|
|
/*---------------------------------------------------------------------
|
|
Function: DPMI_UnlockMemory
|
|
|
|
Unlocks a region of memory that was previously locked.
|
|
---------------------------------------------------------------------*/
|
|
|
|
int DPMI_UnlockMemory
|
|
(
|
|
void *address,
|
|
unsigned length
|
|
)
|
|
|
|
{
|
|
return ( DPMI_Ok );
|
|
}
|
|
|
|
|
|
/*---------------------------------------------------------------------
|
|
Function: DPMI_UnlockMemoryRegion
|
|
|
|
Unlocks a region of memory that was previously locked.
|
|
---------------------------------------------------------------------*/
|
|
|
|
int DPMI_UnlockMemoryRegion
|
|
(
|
|
void *start,
|
|
void *end
|
|
)
|
|
|
|
{
|
|
int status;
|
|
|
|
status = DPMI_UnlockMemory( start, ( char * )end - ( char * )start );
|
|
|
|
return( status );
|
|
}
|
|
|
|
int DPMI_GetDOSMemory( void **ptr, int *descriptor, unsigned length )
|
|
{
|
|
/* Lovely... */
|
|
|
|
*ptr = (void *)malloc(length);
|
|
|
|
*descriptor = (int) *ptr;
|
|
|
|
return (descriptor == 0) ? DPMI_Error : DPMI_Ok;
|
|
}
|
|
|
|
int DPMI_FreeDOSMemory( int descriptor )
|
|
{
|
|
free((void *)descriptor);
|
|
|
|
return (descriptor == 0) ? DPMI_Error : DPMI_Ok;
|
|
}
|