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author Paper <paper@tflc.us>
date Mon, 05 Jan 2026 02:15:46 -0500
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0:e9bb126753e7 1:20d02a178406
1 #ifndef __khrplatform_h_
2 #define __khrplatform_h_
3
4 /*
5 ** Copyright (c) 2008-2018 The Khronos Group Inc.
6 **
7 ** Permission is hereby granted, free of charge, to any person obtaining a
8 ** copy of this software and/or associated documentation files (the
9 ** "Materials"), to deal in the Materials without restriction, including
10 ** without limitation the rights to use, copy, modify, merge, publish,
11 ** distribute, sublicense, and/or sell copies of the Materials, and to
12 ** permit persons to whom the Materials are furnished to do so, subject to
13 ** the following conditions:
14 **
15 ** The above copyright notice and this permission notice shall be included
16 ** in all copies or substantial portions of the Materials.
17 **
18 ** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 ** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 ** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
21 ** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
22 ** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 ** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 ** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
25 */
26
27 /* Khronos platform-specific types and definitions.
28 *
29 * The master copy of khrplatform.h is maintained in the Khronos EGL
30 * Registry repository at https://github.com/KhronosGroup/EGL-Registry
31 * The last semantic modification to khrplatform.h was at commit ID:
32 * 67a3e0864c2d75ea5287b9f3d2eb74a745936692
33 *
34 * Adopters may modify this file to suit their platform. Adopters are
35 * encouraged to submit platform specific modifications to the Khronos
36 * group so that they can be included in future versions of this file.
37 * Please submit changes by filing pull requests or issues on
38 * the EGL Registry repository linked above.
39 *
40 *
41 * See the Implementer's Guidelines for information about where this file
42 * should be located on your system and for more details of its use:
43 * http://www.khronos.org/registry/implementers_guide.pdf
44 *
45 * This file should be included as
46 * #include <KHR/khrplatform.h>
47 * by Khronos client API header files that use its types and defines.
48 *
49 * The types in khrplatform.h should only be used to define API-specific types.
50 *
51 * Types defined in khrplatform.h:
52 * khronos_int8_t signed 8 bit
53 * khronos_uint8_t unsigned 8 bit
54 * khronos_int16_t signed 16 bit
55 * khronos_uint16_t unsigned 16 bit
56 * khronos_int32_t signed 32 bit
57 * khronos_uint32_t unsigned 32 bit
58 * khronos_int64_t signed 64 bit
59 * khronos_uint64_t unsigned 64 bit
60 * khronos_intptr_t signed same number of bits as a pointer
61 * khronos_uintptr_t unsigned same number of bits as a pointer
62 * khronos_ssize_t signed size
63 * khronos_usize_t unsigned size
64 * khronos_float_t signed 32 bit floating point
65 * khronos_time_ns_t unsigned 64 bit time in nanoseconds
66 * khronos_utime_nanoseconds_t unsigned time interval or absolute time in
67 * nanoseconds
68 * khronos_stime_nanoseconds_t signed time interval in nanoseconds
69 * khronos_boolean_enum_t enumerated boolean type. This should
70 * only be used as a base type when a client API's boolean type is
71 * an enum. Client APIs which use an integer or other type for
72 * booleans cannot use this as the base type for their boolean.
73 *
74 * Tokens defined in khrplatform.h:
75 *
76 * KHRONOS_FALSE, KHRONOS_TRUE Enumerated boolean false/true values.
77 *
78 * KHRONOS_SUPPORT_INT64 is 1 if 64 bit integers are supported; otherwise 0.
79 * KHRONOS_SUPPORT_FLOAT is 1 if floats are supported; otherwise 0.
80 *
81 * Calling convention macros defined in this file:
82 * KHRONOS_APICALL
83 * KHRONOS_APIENTRY
84 * KHRONOS_APIATTRIBUTES
85 *
86 * These may be used in function prototypes as:
87 *
88 * KHRONOS_APICALL void KHRONOS_APIENTRY funcname(
89 * int arg1,
90 * int arg2) KHRONOS_APIATTRIBUTES;
91 */
92
93 #if defined(__SCITECH_SNAP__) && !defined(KHRONOS_STATIC)
94 # define KHRONOS_STATIC 1
95 #endif
96
97 /*-------------------------------------------------------------------------
98 * Definition of KHRONOS_APICALL
99 *-------------------------------------------------------------------------
100 * This precedes the return type of the function in the function prototype.
101 */
102 #if defined(KHRONOS_STATIC)
103 /* If the preprocessor constant KHRONOS_STATIC is defined, make the
104 * header compatible with static linking. */
105 # define KHRONOS_APICALL
106 #elif defined(_WIN32)
107 # define KHRONOS_APICALL __declspec(dllimport)
108 #elif defined (__SYMBIAN32__)
109 # define KHRONOS_APICALL IMPORT_C
110 #elif defined(__ANDROID__)
111 # define KHRONOS_APICALL __attribute__((visibility("default")))
112 #else
113 # define KHRONOS_APICALL
114 #endif
115
116 /*-------------------------------------------------------------------------
117 * Definition of KHRONOS_APIENTRY
118 *-------------------------------------------------------------------------
119 * This follows the return type of the function and precedes the function
120 * name in the function prototype.
121 */
122 #if defined(_WIN32) && !defined(_WIN32_WCE) && !defined(__SCITECH_SNAP__)
123 /* Win32 but not WinCE */
124 # define KHRONOS_APIENTRY __stdcall
125 #else
126 # define KHRONOS_APIENTRY
127 #endif
128
129 /*-------------------------------------------------------------------------
130 * Definition of KHRONOS_APIATTRIBUTES
131 *-------------------------------------------------------------------------
132 * This follows the closing parenthesis of the function prototype arguments.
133 */
134 #if defined (__ARMCC_2__)
135 #define KHRONOS_APIATTRIBUTES __softfp
136 #else
137 #define KHRONOS_APIATTRIBUTES
138 #endif
139
140 /*-------------------------------------------------------------------------
141 * basic type definitions
142 *-----------------------------------------------------------------------*/
143 #if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || defined(__GNUC__) || defined(__SCO__) || defined(__USLC__)
144
145
146 /*
147 * Using <stdint.h>
148 */
149 #include <stdint.h>
150 typedef int32_t khronos_int32_t;
151 typedef uint32_t khronos_uint32_t;
152 typedef int64_t khronos_int64_t;
153 typedef uint64_t khronos_uint64_t;
154 #define KHRONOS_SUPPORT_INT64 1
155 #define KHRONOS_SUPPORT_FLOAT 1
156 /*
157 * To support platform where unsigned long cannot be used interchangeably with
158 * inptr_t (e.g. CHERI-extended ISAs), we can use the stdint.h intptr_t.
159 * Ideally, we could just use (u)intptr_t everywhere, but this could result in
160 * ABI breakage if khronos_uintptr_t is changed from unsigned long to
161 * unsigned long long or similar (this results in different C++ name mangling).
162 * To avoid changes for existing platforms, we restrict usage of intptr_t to
163 * platforms where the size of a pointer is larger than the size of long.
164 */
165 #if defined(__SIZEOF_LONG__) && defined(__SIZEOF_POINTER__)
166 #if __SIZEOF_POINTER__ > __SIZEOF_LONG__
167 #define KHRONOS_USE_INTPTR_T
168 #endif
169 #endif
170
171 #elif defined(__VMS ) || defined(__sgi)
172
173 /*
174 * Using <inttypes.h>
175 */
176 #include <inttypes.h>
177 typedef int32_t khronos_int32_t;
178 typedef uint32_t khronos_uint32_t;
179 typedef int64_t khronos_int64_t;
180 typedef uint64_t khronos_uint64_t;
181 #define KHRONOS_SUPPORT_INT64 1
182 #define KHRONOS_SUPPORT_FLOAT 1
183
184 #elif defined(_WIN32) && !defined(__SCITECH_SNAP__)
185
186 /*
187 * Win32
188 */
189 typedef __int32 khronos_int32_t;
190 typedef unsigned __int32 khronos_uint32_t;
191 typedef __int64 khronos_int64_t;
192 typedef unsigned __int64 khronos_uint64_t;
193 #define KHRONOS_SUPPORT_INT64 1
194 #define KHRONOS_SUPPORT_FLOAT 1
195
196 #elif defined(__sun__) || defined(__digital__)
197
198 /*
199 * Sun or Digital
200 */
201 typedef int khronos_int32_t;
202 typedef unsigned int khronos_uint32_t;
203 #if defined(__arch64__) || defined(_LP64)
204 typedef long int khronos_int64_t;
205 typedef unsigned long int khronos_uint64_t;
206 #else
207 typedef long long int khronos_int64_t;
208 typedef unsigned long long int khronos_uint64_t;
209 #endif /* __arch64__ */
210 #define KHRONOS_SUPPORT_INT64 1
211 #define KHRONOS_SUPPORT_FLOAT 1
212
213 #elif 0
214
215 /*
216 * Hypothetical platform with no float or int64 support
217 */
218 typedef int khronos_int32_t;
219 typedef unsigned int khronos_uint32_t;
220 #define KHRONOS_SUPPORT_INT64 0
221 #define KHRONOS_SUPPORT_FLOAT 0
222
223 #else
224
225 /*
226 * Generic fallback
227 */
228 #include <stdint.h>
229 typedef int32_t khronos_int32_t;
230 typedef uint32_t khronos_uint32_t;
231 typedef int64_t khronos_int64_t;
232 typedef uint64_t khronos_uint64_t;
233 #define KHRONOS_SUPPORT_INT64 1
234 #define KHRONOS_SUPPORT_FLOAT 1
235
236 #endif
237
238
239 /*
240 * Types that are (so far) the same on all platforms
241 */
242 typedef signed char khronos_int8_t;
243 typedef unsigned char khronos_uint8_t;
244 typedef signed short int khronos_int16_t;
245 typedef unsigned short int khronos_uint16_t;
246
247 /*
248 * Types that differ between LLP64 and LP64 architectures - in LLP64,
249 * pointers are 64 bits, but 'long' is still 32 bits. Win64 appears
250 * to be the only LLP64 architecture in current use.
251 */
252 #ifdef KHRONOS_USE_INTPTR_T
253 typedef intptr_t khronos_intptr_t;
254 typedef uintptr_t khronos_uintptr_t;
255 #elif defined(_WIN64)
256 typedef signed long long int khronos_intptr_t;
257 typedef unsigned long long int khronos_uintptr_t;
258 #else
259 typedef signed long int khronos_intptr_t;
260 typedef unsigned long int khronos_uintptr_t;
261 #endif
262
263 #if defined(_WIN64)
264 typedef signed long long int khronos_ssize_t;
265 typedef unsigned long long int khronos_usize_t;
266 #else
267 typedef signed long int khronos_ssize_t;
268 typedef unsigned long int khronos_usize_t;
269 #endif
270
271 #if KHRONOS_SUPPORT_FLOAT
272 /*
273 * Float type
274 */
275 typedef float khronos_float_t;
276 #endif
277
278 #if KHRONOS_SUPPORT_INT64
279 /* Time types
280 *
281 * These types can be used to represent a time interval in nanoseconds or
282 * an absolute Unadjusted System Time. Unadjusted System Time is the number
283 * of nanoseconds since some arbitrary system event (e.g. since the last
284 * time the system booted). The Unadjusted System Time is an unsigned
285 * 64 bit value that wraps back to 0 every 584 years. Time intervals
286 * may be either signed or unsigned.
287 */
288 typedef khronos_uint64_t khronos_utime_nanoseconds_t;
289 typedef khronos_int64_t khronos_stime_nanoseconds_t;
290 #endif
291
292 /*
293 * Dummy value used to pad enum types to 32 bits.
294 */
295 #ifndef KHRONOS_MAX_ENUM
296 #define KHRONOS_MAX_ENUM 0x7FFFFFFF
297 #endif
298
299 /*
300 * Enumerated boolean type
301 *
302 * Values other than zero should be considered to be true. Therefore
303 * comparisons should not be made against KHRONOS_TRUE.
304 */
305 typedef enum {
306 KHRONOS_FALSE = 0,
307 KHRONOS_TRUE = 1,
308 KHRONOS_BOOLEAN_ENUM_FORCE_SIZE = KHRONOS_MAX_ENUM
309 } khronos_boolean_enum_t;
310
311 #endif /* __khrplatform_h_ */