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1 | /**************************************************************************** |
2 | * | |
3 | * SciTech Nucleus Graphics Architecture | |
4 | * | |
5 | * Copyright (C) 1991-1998 SciTech Software, Inc. | |
6 | * All rights reserved. | |
7 | * | |
8 | * ====================================================================== | |
9 | * |REMOVAL OR MODIFICATION OF THIS HEADER IS STRICTLY PROHIBITED BY LAW| | |
10 | * | | | |
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). | | |
14 | * | | | |
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 | | |
19 | * | | | |
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. | | |
24 | * | | | |
25 | * |REMOVAL OR MODIFICATION OF THIS HEADER IS STRICTLY PROHIBITED BY LAW| | |
26 | * ====================================================================== | |
27 | * | |
28 | * Language: ANSI C | |
29 | * Environment: Linux | |
30 | * | |
31 | * Description: OS specific Nucleus Graphics Architecture services for | |
32 | * the Linux operating system. | |
33 | * | |
34 | ****************************************************************************/ | |
35 | ||
36 | #include "nucleus/graphics.h" | |
37 | #include <sys/time.h> | |
38 | ||
39 | /*---------------------------- Global Variables ---------------------------*/ | |
40 | ||
41 | static ibool haveRDTSC; | |
42 | ||
43 | /*-------------------------- Implementation -------------------------------*/ | |
44 | ||
45 | /**************************************************************************** | |
46 | PARAMETERS: | |
47 | path - Local path to the Nucleus driver files. | |
48 | ||
49 | REMARKS: | |
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( | |
57 | const char *path) | |
58 | { | |
59 | PM_setLocalBPDPath(path); | |
60 | } | |
61 | ||
62 | /**************************************************************************** | |
63 | RETURNS: | |
64 | Pointer to the system wide PM library imports, or the internal version if none | |
65 | ||
66 | REMARKS: | |
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) | |
74 | { | |
8bde7f77 WD |
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! */ | |
c7de829c WD |
79 | return &_PM_imports; |
80 | } | |
81 | ||
82 | /**************************************************************************** | |
83 | REMARKS: | |
84 | Nothing special for this OS. | |
85 | ****************************************************************************/ | |
86 | ibool NAPI GA_getSharedExports( | |
87 | GA_exports *gaExp, | |
88 | ibool shared) | |
89 | { | |
90 | (void)gaExp; | |
91 | (void)shared; | |
92 | return false; | |
93 | } | |
94 | ||
95 | #ifndef TEST_HARNESS | |
96 | /**************************************************************************** | |
97 | REMARKS: | |
98 | Nothing special for this OS | |
99 | ****************************************************************************/ | |
100 | ibool NAPI GA_queryFunctions( | |
101 | GA_devCtx *dc, | |
102 | N_uint32 id, | |
103 | void _FAR_ *funcs) | |
104 | { | |
105 | return __GA_exports.GA_queryFunctions(dc,id,funcs); | |
106 | } | |
107 | ||
108 | /**************************************************************************** | |
109 | REMARKS: | |
110 | Nothing special for this OS | |
111 | ****************************************************************************/ | |
112 | ibool NAPI REF2D_queryFunctions( | |
113 | REF2D_driver *ref2d, | |
114 | N_uint32 id, | |
115 | void _FAR_ *funcs) | |
116 | { | |
117 | return __GA_exports.REF2D_queryFunctions(ref2d,id,funcs); | |
118 | } | |
119 | #endif | |
120 | ||
121 | /**************************************************************************** | |
122 | REMARKS: | |
123 | This function initialises the high precision timing functions for the | |
124 | Nucleus loader library. | |
125 | ****************************************************************************/ | |
126 | ibool NAPI GA_TimerInit(void) | |
127 | { | |
128 | if (_GA_haveCPUID() && (_GA_getCPUIDFeatures() & CPU_HaveRDTSC) != 0) | |
8bde7f77 | 129 | haveRDTSC = true; |
c7de829c WD |
130 | return true; |
131 | } | |
132 | ||
133 | /**************************************************************************** | |
134 | REMARKS: | |
135 | This function reads the high resolution timer. | |
136 | ****************************************************************************/ | |
137 | void NAPI GA_TimerRead( | |
138 | GA_largeInteger *value) | |
139 | { | |
140 | if (haveRDTSC) | |
8bde7f77 | 141 | _GA_readTimeStamp(value); |
c7de829c | 142 | else { |
8bde7f77 WD |
143 | struct timeval t; |
144 | gettimeofday(&t, NULL); | |
145 | value->low = t.tv_sec*1000000 + t.tv_usec; | |
146 | value->high = 0; | |
147 | } | |
c7de829c | 148 | } |