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/****************************************************************************
*
* SciTech Nucleus Graphics Architecture
*
* Copyright (C) 1991-1998 SciTech Software, Inc.
* All rights reserved.
*
* ======================================================================
* |REMOVAL OR MODIFICATION OF THIS HEADER IS STRICTLY PROHIBITED BY LAW|
* | |
* |This copyrighted computer code contains proprietary technology |
* |owned by SciTech Software, Inc., located at 505 Wall Street, |
* |Chico, CA 95928 USA (http://www.scitechsoft.com). |
* | |
* |The contents of this file are subject to the SciTech Nucleus |
* |License; you may *not* use this file or related software except in |
* |compliance with the License. You may obtain a copy of the License |
* |at http://www.scitechsoft.com/nucleus-license.txt |
* | |
* |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. |
* | |
* |REMOVAL OR MODIFICATION OF THIS HEADER IS STRICTLY PROHIBITED BY LAW|
* ======================================================================
*
* Language: ANSI C
* Environment: Win32 VxD
*
* Description: OS specific Nucleus Graphics Architecture services for
* the Win32 VxD's.
*
****************************************************************************/
#include "sdd/sddhelp.h"
/*------------------------- Global Variables ------------------------------*/
static ibool haveRDTSC;
/*-------------------------- Implementation -------------------------------*/
/****************************************************************************
REMARKS:
Return the internal shared info structure.
****************************************************************************/
GA_sharedInfo * NAPI GA_getSharedInfo(
int device)
{
static GA_sharedInfo shared = {0,-1};
return &shared;
}
/****************************************************************************
REMARKS:
Nothing special for this OS.
****************************************************************************/
ibool NAPI GA_getSharedExports(
GA_exports *gaExp)
{
(void)gaExp;
return false;
}
/****************************************************************************
REMARKS:
This function initialises the high precision timing functions for the
Nucleus loader library.
****************************************************************************/
ibool NAPI GA_TimerInit(void)
{
if (_GA_haveCPUID() && (_GA_getCPUIDFeatures() & CPU_HaveRDTSC) != 0) {
haveRDTSC = true;
}
return true;
}
/****************************************************************************
REMARKS:
This function reads the high resolution timer.
****************************************************************************/
void NAPI GA_TimerRead(
GA_largeInteger *value)
{
if (haveRDTSC)
_GA_readTimeStamp(value);
else
VTD_Get_Real_Time(&value->high,&value->low);
}
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