ref: 516fc276f112baf0bd4508596598aed49929bde9
dir: /src/audiolib/nodpmi.c/
/*
Copyright (C) 1994-1995 Apogee Software, Ltd.
Copyright (C) 2002-2015 icculus.org, GNU/Linux port
Copyright (C) 2017-2018 Steven LeVesque
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.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/**********************************************************************
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, long *descriptor, unsigned length )
{
/* Lovely... */
*ptr = (void *)malloc(length);
*descriptor = (long) *ptr;
return (descriptor == 0) ? DPMI_Error : DPMI_Ok;
}
int DPMI_FreeDOSMemory( long descriptor )
{
free((void *)descriptor);
return (descriptor == 0) ? DPMI_Error : DPMI_Ok;
}