140 lines
5.2 KiB
C
140 lines
5.2 KiB
C
/****************************************************************************
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*
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* SciTech Nucleus Graphics Architecture
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*
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* Copyright (C) 1991-1998 SciTech Software, Inc.
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* All rights reserved.
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*
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* ======================================================================
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* |REMOVAL OR MODIFICATION OF THIS HEADER IS STRICTLY PROHIBITED BY LAW|
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* | |
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* |This copyrighted computer code contains proprietary technology |
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* |owned by SciTech Software, Inc., located at 505 Wall Street, |
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* |Chico, CA 95928 USA (http://www.scitechsoft.com). |
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* | |
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* |The contents of this file are subject to the SciTech Nucleus |
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* |License; you may *not* use this file or related software except in |
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* |compliance with the License. You may obtain a copy of the License |
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* |at http://www.scitechsoft.com/nucleus-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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* |REMOVAL OR MODIFICATION OF THIS HEADER IS STRICTLY PROHIBITED BY LAW|
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* ======================================================================
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*
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* Language: ANSI C
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* Environment: RTTarget-32
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*
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* Description: OS specific Nucleus Graphics Architecture services for
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* the RTTarget-32 operating system environments.
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*
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****************************************************************************/
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#include "nucleus/graphics.h"
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/*------------------------- Global Variables ------------------------------*/
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static ibool haveRDTSC;
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/*-------------------------- Implementation -------------------------------*/
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/****************************************************************************
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PARAMETERS:
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path - Local path to the Nucleus driver files.
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REMARKS:
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This function is used by the application program to override the location
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of the Nucleus driver files that are loaded. Normally the loader code
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will look in the system Nucleus directories first, then in the 'drivers'
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directory relative to the current working directory, and finally relative
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to the MGL_ROOT environment variable.
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****************************************************************************/
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void NAPI GA_setLocalPath(
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const char *path)
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{
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PM_setLocalBPDPath(path);
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}
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/****************************************************************************
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RETURNS:
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Pointer to the system wide PM library imports, or the internal version if none
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REMARKS:
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In order to support deploying new Nucleus drivers that may require updated
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PM library functions, we check here to see if there is a system wide version
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of the PM functions available. If so we return those functions for use with
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the system wide Nucleus drivers, otherwise the compiled in version of the PM
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library is used with the application local version of Nucleus.
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****************************************************************************/
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PM_imports * NAPI GA_getSystemPMImports(void)
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{
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return &_PM_imports;
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}
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/****************************************************************************
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REMARKS:
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Nothing special for this OS.
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****************************************************************************/
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ibool NAPI GA_getSharedExports(
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GA_exports *gaExp,
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ibool shared)
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{
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(void)gaExp;
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(void)shared;
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return false;
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}
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#ifndef TEST_HARNESS
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/****************************************************************************
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REMARKS:
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Nothing special for this OS
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****************************************************************************/
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ibool NAPI GA_queryFunctions(
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GA_devCtx *dc,
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N_uint32 id,
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void _FAR_ *funcs)
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{
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return __GA_exports.GA_queryFunctions(dc,id,funcs);
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}
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/****************************************************************************
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REMARKS:
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Nothing special for this OS
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****************************************************************************/
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ibool NAPI REF2D_queryFunctions(
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REF2D_driver *ref2d,
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N_uint32 id,
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void _FAR_ *funcs)
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{
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return __GA_exports.REF2D_queryFunctions(ref2d,id,funcs);
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}
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#endif
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/****************************************************************************
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REMARKS:
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This function initialises the high precision timing functions for the
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Nucleus loader library.
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****************************************************************************/
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ibool NAPI GA_TimerInit(void)
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{
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if (_GA_haveCPUID() && (_GA_getCPUIDFeatures() & CPU_HaveRDTSC) != 0) {
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haveRDTSC = true;
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return true;
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}
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return false;
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}
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/****************************************************************************
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REMARKS:
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This function reads the high resolution timer.
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****************************************************************************/
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void NAPI GA_TimerRead(
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GA_largeInteger *value)
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{
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if (haveRDTSC)
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_GA_readTimeStamp(value);
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}
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