1 /****************************************************************************
3 * SciTech Nucleus Graphics Architecture
5 * Copyright (C) 1991-1998 SciTech Software, Inc.
8 * ======================================================================
9 * |REMOVAL OR MODIFICATION OF THIS HEADER IS STRICTLY PROHIBITED BY LAW|
11 * |This copyrighted computer code contains proprietary technology |
12 * |owned by SciTech Software, Inc., located at 505 Wall Street, |
13 * |Chico, CA 95928 USA (http://www.scitechsoft.com). |
15 * |The contents of this file are subject to the SciTech Nucleus |
16 * |License; you may *not* use this file or related software except in |
17 * |compliance with the License. You may obtain a copy of the License |
18 * |at http://www.scitechsoft.com/nucleus-license.txt |
20 * |Software distributed under the License is distributed on an |
21 * |"AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or |
22 * |implied. See the License for the specific language governing |
23 * |rights and limitations under the License. |
25 * |REMOVAL OR MODIFICATION OF THIS HEADER IS STRICTLY PROHIBITED BY LAW|
26 * ======================================================================
31 * Description: OS specific Nucleus Graphics Architecture services for
32 * the Linux operating system.
34 ****************************************************************************/
36 #include "nucleus/graphics.h"
39 /*---------------------------- Global Variables ---------------------------*/
41 static ibool haveRDTSC;
43 /*-------------------------- Implementation -------------------------------*/
45 /****************************************************************************
47 path - Local path to the Nucleus driver files.
50 This function is used by the application program to override the location
51 of the Nucleus driver files that are loaded. Normally the loader code
52 will look in the system Nucleus directories first, then in the 'drivers'
53 directory relative to the current working directory, and finally relative
54 to the MGL_ROOT environment variable.
55 ****************************************************************************/
56 void NAPI GA_setLocalPath(
59 PM_setLocalBPDPath(path);
62 /****************************************************************************
64 Pointer to the system wide PM library imports, or the internal version if none
67 In order to support deploying new Nucleus drivers that may require updated
68 PM library functions, we check here to see if there is a system wide version
69 of the PM functions available. If so we return those functions for use with
70 the system wide Nucleus drivers, otherwise the compiled in version of the PM
71 library is used with the application local version of Nucleus.
72 ****************************************************************************/
73 PM_imports * NAPI GA_getSystemPMImports(void)
75 /* TODO: We may very well want to provide a system shared library */
76 /* that eports the PM functions required by the Nucleus library */
77 /* for Linux here. That will eliminate fatal errors loading new */
78 /* drivers on Linux! */
82 /****************************************************************************
84 Nothing special for this OS.
85 ****************************************************************************/
86 ibool NAPI GA_getSharedExports(
96 /****************************************************************************
98 Nothing special for this OS
99 ****************************************************************************/
100 ibool NAPI GA_queryFunctions(
105 return __GA_exports.GA_queryFunctions(dc,id,funcs);
108 /****************************************************************************
110 Nothing special for this OS
111 ****************************************************************************/
112 ibool NAPI REF2D_queryFunctions(
117 return __GA_exports.REF2D_queryFunctions(ref2d,id,funcs);
121 /****************************************************************************
123 This function initialises the high precision timing functions for the
124 Nucleus loader library.
125 ****************************************************************************/
126 ibool NAPI GA_TimerInit(void)
128 if (_GA_haveCPUID() && (_GA_getCPUIDFeatures() & CPU_HaveRDTSC) != 0)
133 /****************************************************************************
135 This function reads the high resolution timer.
136 ****************************************************************************/
137 void NAPI GA_TimerRead(
138 GA_largeInteger *value)
141 _GA_readTimeStamp(value);
144 gettimeofday(&t, NULL);
145 value->low = t.tv_sec*1000000 + t.tv_usec;