| @@ -1,717 +1,717 @@ | | | @@ -1,717 +1,717 @@ |
1 | /* $NetBSD: cdefs.h,v 1.152 2020/04/17 14:33:42 kamil Exp $ */ | | 1 | /* $NetBSD: cdefs.h,v 1.153 2020/04/17 14:59:23 joerg Exp $ */ |
2 | | | 2 | |
3 | /* * Copyright (c) 1991, 1993 | | 3 | /* * Copyright (c) 1991, 1993 |
4 | * The Regents of the University of California. All rights reserved. | | 4 | * The Regents of the University of California. All rights reserved. |
5 | * | | 5 | * |
6 | * This code is derived from software contributed to Berkeley by | | 6 | * This code is derived from software contributed to Berkeley by |
7 | * Berkeley Software Design, Inc. | | 7 | * Berkeley Software Design, Inc. |
8 | * | | 8 | * |
9 | * Redistribution and use in source and binary forms, with or without | | 9 | * Redistribution and use in source and binary forms, with or without |
10 | * modification, are permitted provided that the following conditions | | 10 | * modification, are permitted provided that the following conditions |
11 | * are met: | | 11 | * are met: |
12 | * 1. Redistributions of source code must retain the above copyright | | 12 | * 1. Redistributions of source code must retain the above copyright |
13 | * notice, this list of conditions and the following disclaimer. | | 13 | * notice, this list of conditions and the following disclaimer. |
14 | * 2. Redistributions in binary form must reproduce the above copyright | | 14 | * 2. Redistributions in binary form must reproduce the above copyright |
15 | * notice, this list of conditions and the following disclaimer in the | | 15 | * notice, this list of conditions and the following disclaimer in the |
16 | * documentation and/or other materials provided with the distribution. | | 16 | * documentation and/or other materials provided with the distribution. |
17 | * 3. Neither the name of the University nor the names of its contributors | | 17 | * 3. Neither the name of the University nor the names of its contributors |
18 | * may be used to endorse or promote products derived from this software | | 18 | * may be used to endorse or promote products derived from this software |
19 | * without specific prior written permission. | | 19 | * without specific prior written permission. |
20 | * | | 20 | * |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | | 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | | 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | | 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | | 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | | 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | | 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | | 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | | 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | | 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | | 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
31 | * SUCH DAMAGE. | | 31 | * SUCH DAMAGE. |
32 | * | | 32 | * |
33 | * @(#)cdefs.h 8.8 (Berkeley) 1/9/95 | | 33 | * @(#)cdefs.h 8.8 (Berkeley) 1/9/95 |
34 | */ | | 34 | */ |
35 | | | 35 | |
36 | #ifndef _SYS_CDEFS_H_ | | 36 | #ifndef _SYS_CDEFS_H_ |
37 | #define _SYS_CDEFS_H_ | | 37 | #define _SYS_CDEFS_H_ |
38 | | | 38 | |
39 | #ifdef _KERNEL_OPT | | 39 | #ifdef _KERNEL_OPT |
40 | #include "opt_diagnostic.h" | | 40 | #include "opt_diagnostic.h" |
41 | #endif | | 41 | #endif |
42 | | | 42 | |
43 | /* | | 43 | /* |
44 | * Macro to test if we're using a GNU C compiler of a specific vintage | | 44 | * Macro to test if we're using a GNU C compiler of a specific vintage |
45 | * or later, for e.g. features that appeared in a particular version | | 45 | * or later, for e.g. features that appeared in a particular version |
46 | * of GNU C. Usage: | | 46 | * of GNU C. Usage: |
47 | * | | 47 | * |
48 | * #if __GNUC_PREREQ__(major, minor) | | 48 | * #if __GNUC_PREREQ__(major, minor) |
49 | * ...cool feature... | | 49 | * ...cool feature... |
50 | * #else | | 50 | * #else |
51 | * ...delete feature... | | 51 | * ...delete feature... |
52 | * #endif | | 52 | * #endif |
53 | */ | | 53 | */ |
54 | #ifdef __GNUC__ | | 54 | #ifdef __GNUC__ |
55 | #define __GNUC_PREREQ__(x, y) \ | | 55 | #define __GNUC_PREREQ__(x, y) \ |
56 | ((__GNUC__ == (x) && __GNUC_MINOR__ >= (y)) || \ | | 56 | ((__GNUC__ == (x) && __GNUC_MINOR__ >= (y)) || \ |
57 | (__GNUC__ > (x))) | | 57 | (__GNUC__ > (x))) |
58 | #else | | 58 | #else |
59 | #define __GNUC_PREREQ__(x, y) 0 | | 59 | #define __GNUC_PREREQ__(x, y) 0 |
60 | #endif | | 60 | #endif |
61 | | | 61 | |
62 | /* | | 62 | /* |
63 | * Macros to test Clang/LLVM features. | | 63 | * Macros to test Clang/LLVM features. |
64 | * Usage: | | 64 | * Usage: |
65 | * | | 65 | * |
66 | * #if __has_feature(safe_stack) | | 66 | * #if __has_feature(safe_stack) |
67 | * ...SafeStack specific code... | | 67 | * ...SafeStack specific code... |
68 | * #else | | 68 | * #else |
69 | * ..regular code... | | 69 | * ..regular code... |
70 | * #endif | | 70 | * #endif |
71 | */ | | 71 | */ |
72 | #ifndef __has_feature | | 72 | #ifndef __has_feature |
73 | #define __has_feature(x) 0 | | 73 | #define __has_feature(x) 0 |
74 | #endif | | 74 | #endif |
75 | | | 75 | |
76 | #ifndef __has_extension | | 76 | #ifndef __has_extension |
77 | #define __has_extension __has_feature /* Compat with pre-3.0 Clang */ | | 77 | #define __has_extension __has_feature /* Compat with pre-3.0 Clang */ |
78 | #endif | | 78 | #endif |
79 | | | 79 | |
80 | #include <machine/cdefs.h> | | 80 | #include <machine/cdefs.h> |
81 | #ifdef __ELF__ | | 81 | #ifdef __ELF__ |
82 | #include <sys/cdefs_elf.h> | | 82 | #include <sys/cdefs_elf.h> |
83 | #else | | 83 | #else |
84 | #include <sys/cdefs_aout.h> | | 84 | #include <sys/cdefs_aout.h> |
85 | #endif | | 85 | #endif |
86 | | | 86 | |
87 | #ifdef __GNUC__ | | 87 | #ifdef __GNUC__ |
88 | #define __strict_weak_alias(alias,sym) \ | | 88 | #define __strict_weak_alias(alias,sym) \ |
89 | __unused static __typeof__(alias) *__weak_alias_##alias = &sym; \ | | 89 | __unused static __typeof__(alias) *__weak_alias_##alias = &sym; \ |
90 | __weak_alias(alias,sym) | | 90 | __weak_alias(alias,sym) |
91 | #else | | 91 | #else |
92 | #define __strict_weak_alias(alias,sym) __weak_alias(alias,sym) | | 92 | #define __strict_weak_alias(alias,sym) __weak_alias(alias,sym) |
93 | #endif | | 93 | #endif |
94 | | | 94 | |
95 | /* | | 95 | /* |
96 | * Optional marker for size-optimised MD calling convention. | | 96 | * Optional marker for size-optimised MD calling convention. |
97 | */ | | 97 | */ |
98 | #ifndef __compactcall | | 98 | #ifndef __compactcall |
99 | #define __compactcall | | 99 | #define __compactcall |
100 | #endif | | 100 | #endif |
101 | | | 101 | |
102 | /* | | 102 | /* |
103 | * The __CONCAT macro is used to concatenate parts of symbol names, e.g. | | 103 | * The __CONCAT macro is used to concatenate parts of symbol names, e.g. |
104 | * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo. | | 104 | * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo. |
105 | * The __CONCAT macro is a bit tricky -- make sure you don't put spaces | | 105 | * The __CONCAT macro is a bit tricky -- make sure you don't put spaces |
106 | * in between its arguments. __CONCAT can also concatenate double-quoted | | 106 | * in between its arguments. __CONCAT can also concatenate double-quoted |
107 | * strings produced by the __STRING macro, but this only works with ANSI C. | | 107 | * strings produced by the __STRING macro, but this only works with ANSI C. |
108 | */ | | 108 | */ |
109 | | | 109 | |
110 | #define ___STRING(x) __STRING(x) | | 110 | #define ___STRING(x) __STRING(x) |
111 | #define ___CONCAT(x,y) __CONCAT(x,y) | | 111 | #define ___CONCAT(x,y) __CONCAT(x,y) |
112 | | | 112 | |
113 | #if __STDC__ || defined(__cplusplus) | | 113 | #if __STDC__ || defined(__cplusplus) |
114 | #define __P(protos) protos /* full-blown ANSI C */ | | 114 | #define __P(protos) protos /* full-blown ANSI C */ |
115 | #define __CONCAT(x,y) x ## y | | 115 | #define __CONCAT(x,y) x ## y |
116 | #define __STRING(x) #x | | 116 | #define __STRING(x) #x |
117 | | | 117 | |
118 | #define __const const /* define reserved names to standard */ | | 118 | #define __const const /* define reserved names to standard */ |
119 | #define __signed signed | | 119 | #define __signed signed |
120 | #define __volatile volatile | | 120 | #define __volatile volatile |
121 | #if defined(__cplusplus) || defined(__PCC__) | | 121 | #if defined(__cplusplus) || defined(__PCC__) |
122 | #define __inline inline /* convert to C++/C99 keyword */ | | 122 | #define __inline inline /* convert to C++/C99 keyword */ |
123 | #else | | 123 | #else |
124 | #if !defined(__GNUC__) && !defined(__lint__) | | 124 | #if !defined(__GNUC__) && !defined(__lint__) |
125 | #define __inline /* delete GCC keyword */ | | 125 | #define __inline /* delete GCC keyword */ |
126 | #endif /* !__GNUC__ && !__lint__ */ | | 126 | #endif /* !__GNUC__ && !__lint__ */ |
127 | #endif /* !__cplusplus */ | | 127 | #endif /* !__cplusplus */ |
128 | | | 128 | |
129 | #else /* !(__STDC__ || __cplusplus) */ | | 129 | #else /* !(__STDC__ || __cplusplus) */ |
130 | #define __P(protos) () /* traditional C preprocessor */ | | 130 | #define __P(protos) () /* traditional C preprocessor */ |
131 | #define __CONCAT(x,y) x/**/y | | 131 | #define __CONCAT(x,y) x/**/y |
132 | #define __STRING(x) "x" | | 132 | #define __STRING(x) "x" |
133 | | | 133 | |
134 | #ifndef __GNUC__ | | 134 | #ifndef __GNUC__ |
135 | #define __const /* delete pseudo-ANSI C keywords */ | | 135 | #define __const /* delete pseudo-ANSI C keywords */ |
136 | #define __inline | | 136 | #define __inline |
137 | #define __signed | | 137 | #define __signed |
138 | #define __volatile | | 138 | #define __volatile |
139 | #endif /* !__GNUC__ */ | | 139 | #endif /* !__GNUC__ */ |
140 | | | 140 | |
141 | /* | | 141 | /* |
142 | * In non-ANSI C environments, new programs will want ANSI-only C keywords | | 142 | * In non-ANSI C environments, new programs will want ANSI-only C keywords |
143 | * deleted from the program and old programs will want them left alone. | | 143 | * deleted from the program and old programs will want them left alone. |
144 | * Programs using the ANSI C keywords const, inline etc. as normal | | 144 | * Programs using the ANSI C keywords const, inline etc. as normal |
145 | * identifiers should define -DNO_ANSI_KEYWORDS. | | 145 | * identifiers should define -DNO_ANSI_KEYWORDS. |
146 | */ | | 146 | */ |
147 | #ifndef NO_ANSI_KEYWORDS | | 147 | #ifndef NO_ANSI_KEYWORDS |
148 | #define const __const /* convert ANSI C keywords */ | | 148 | #define const __const /* convert ANSI C keywords */ |
149 | #define inline __inline | | 149 | #define inline __inline |
150 | #define signed __signed | | 150 | #define signed __signed |
151 | #define volatile __volatile | | 151 | #define volatile __volatile |
152 | #endif /* !NO_ANSI_KEYWORDS */ | | 152 | #endif /* !NO_ANSI_KEYWORDS */ |
153 | #endif /* !(__STDC__ || __cplusplus) */ | | 153 | #endif /* !(__STDC__ || __cplusplus) */ |
154 | | | 154 | |
155 | /* | | 155 | /* |
156 | * Used for internal auditing of the NetBSD source tree. | | 156 | * Used for internal auditing of the NetBSD source tree. |
157 | */ | | 157 | */ |
158 | #ifdef __AUDIT__ | | 158 | #ifdef __AUDIT__ |
159 | #define __aconst __const | | 159 | #define __aconst __const |
160 | #else | | 160 | #else |
161 | #define __aconst | | 161 | #define __aconst |
162 | #endif | | 162 | #endif |
163 | | | 163 | |
164 | /* | | 164 | /* |
165 | * Compile Time Assertion. | | 165 | * Compile Time Assertion. |
166 | */ | | 166 | */ |
167 | #ifdef __COUNTER__ | | 167 | #ifdef __COUNTER__ |
168 | #define __CTASSERT(x) __CTASSERT0(x, __ctassert, __COUNTER__) | | 168 | #define __CTASSERT(x) __CTASSERT0(x, __ctassert, __COUNTER__) |
169 | #else | | 169 | #else |
170 | #define __CTASSERT(x) __CTASSERT99(x, __INCLUDE_LEVEL__, __LINE__) | | 170 | #define __CTASSERT(x) __CTASSERT99(x, __INCLUDE_LEVEL__, __LINE__) |
171 | #define __CTASSERT99(x, a, b) __CTASSERT0(x, __CONCAT(__ctassert,a), \ | | 171 | #define __CTASSERT99(x, a, b) __CTASSERT0(x, __CONCAT(__ctassert,a), \ |
172 | __CONCAT(_,b)) | | 172 | __CONCAT(_,b)) |
173 | #endif | | 173 | #endif |
174 | #define __CTASSERT0(x, y, z) __CTASSERT1(x, y, z) | | 174 | #define __CTASSERT0(x, y, z) __CTASSERT1(x, y, z) |
175 | #define __CTASSERT1(x, y, z) \ | | 175 | #define __CTASSERT1(x, y, z) \ |
176 | typedef struct y ## z ## _struct __unused { \ | | 176 | struct y ## z ## _struct { \ |
177 | unsigned int y ## z : /*CONSTCOND*/(x) ? 1 : -1; \ | | 177 | unsigned int y ## z : /*CONSTCOND*/(x) ? 1 : -1; \ |
178 | } y ## z ## _struct __unused | | 178 | } |
179 | | | 179 | |
180 | /* | | 180 | /* |
181 | * The following macro is used to remove const cast-away warnings | | 181 | * The following macro is used to remove const cast-away warnings |
182 | * from gcc -Wcast-qual; it should be used with caution because it | | 182 | * from gcc -Wcast-qual; it should be used with caution because it |
183 | * can hide valid errors; in particular most valid uses are in | | 183 | * can hide valid errors; in particular most valid uses are in |
184 | * situations where the API requires it, not to cast away string | | 184 | * situations where the API requires it, not to cast away string |
185 | * constants. We don't use *intptr_t on purpose here and we are | | 185 | * constants. We don't use *intptr_t on purpose here and we are |
186 | * explicit about unsigned long so that we don't have additional | | 186 | * explicit about unsigned long so that we don't have additional |
187 | * dependencies. | | 187 | * dependencies. |
188 | */ | | 188 | */ |
189 | #define __UNCONST(a) ((void *)(unsigned long)(const void *)(a)) | | 189 | #define __UNCONST(a) ((void *)(unsigned long)(const void *)(a)) |
190 | | | 190 | |
191 | /* | | 191 | /* |
192 | * The following macro is used to remove the volatile cast-away warnings | | 192 | * The following macro is used to remove the volatile cast-away warnings |
193 | * from gcc -Wcast-qual; as above it should be used with caution | | 193 | * from gcc -Wcast-qual; as above it should be used with caution |
194 | * because it can hide valid errors or warnings. Valid uses include | | 194 | * because it can hide valid errors or warnings. Valid uses include |
195 | * making it possible to pass a volatile pointer to memset(). | | 195 | * making it possible to pass a volatile pointer to memset(). |
196 | * For the same reasons as above, we use unsigned long and not intptr_t. | | 196 | * For the same reasons as above, we use unsigned long and not intptr_t. |
197 | */ | | 197 | */ |
198 | #define __UNVOLATILE(a) ((void *)(unsigned long)(volatile void *)(a)) | | 198 | #define __UNVOLATILE(a) ((void *)(unsigned long)(volatile void *)(a)) |
199 | | | 199 | |
200 | /* | | 200 | /* |
201 | * The following macro is used to remove the the function type cast warnings | | 201 | * The following macro is used to remove the the function type cast warnings |
202 | * from gcc -Wcast-function-type and as above should be used with caution. | | 202 | * from gcc -Wcast-function-type and as above should be used with caution. |
203 | */ | | 203 | */ |
204 | #define __FPTRCAST(t, f) ((t)(void *)(f)) | | 204 | #define __FPTRCAST(t, f) ((t)(void *)(f)) |
205 | | | 205 | |
206 | /* | | 206 | /* |
207 | * GCC2 provides __extension__ to suppress warnings for various GNU C | | 207 | * GCC2 provides __extension__ to suppress warnings for various GNU C |
208 | * language extensions under "-ansi -pedantic". | | 208 | * language extensions under "-ansi -pedantic". |
209 | */ | | 209 | */ |
210 | #if !__GNUC_PREREQ__(2, 0) | | 210 | #if !__GNUC_PREREQ__(2, 0) |
211 | #define __extension__ /* delete __extension__ if non-gcc or gcc1 */ | | 211 | #define __extension__ /* delete __extension__ if non-gcc or gcc1 */ |
212 | #endif | | 212 | #endif |
213 | | | 213 | |
214 | /* | | 214 | /* |
215 | * GCC1 and some versions of GCC2 declare dead (non-returning) and | | 215 | * GCC1 and some versions of GCC2 declare dead (non-returning) and |
216 | * pure (no side effects) functions using "volatile" and "const"; | | 216 | * pure (no side effects) functions using "volatile" and "const"; |
217 | * unfortunately, these then cause warnings under "-ansi -pedantic". | | 217 | * unfortunately, these then cause warnings under "-ansi -pedantic". |
218 | * GCC2 uses a new, peculiar __attribute__((attrs)) style. All of | | 218 | * GCC2 uses a new, peculiar __attribute__((attrs)) style. All of |
219 | * these work for GNU C++ (modulo a slight glitch in the C++ grammar | | 219 | * these work for GNU C++ (modulo a slight glitch in the C++ grammar |
220 | * in the distribution version of 2.5.5). | | 220 | * in the distribution version of 2.5.5). |
221 | * | | 221 | * |
222 | * GCC defines a pure function as depending only on its arguments and | | 222 | * GCC defines a pure function as depending only on its arguments and |
223 | * global variables. Typical examples are strlen and sqrt. | | 223 | * global variables. Typical examples are strlen and sqrt. |
224 | * | | 224 | * |
225 | * GCC defines a const function as depending only on its arguments. | | 225 | * GCC defines a const function as depending only on its arguments. |
226 | * Therefore calling a const function again with identical arguments | | 226 | * Therefore calling a const function again with identical arguments |
227 | * will always produce the same result. | | 227 | * will always produce the same result. |
228 | * | | 228 | * |
229 | * Rounding modes for floating point operations are considered global | | 229 | * Rounding modes for floating point operations are considered global |
230 | * variables and prevent sqrt from being a const function. | | 230 | * variables and prevent sqrt from being a const function. |
231 | * | | 231 | * |
232 | * Calls to const functions can be optimised away and moved around | | 232 | * Calls to const functions can be optimised away and moved around |
233 | * without limitations. | | 233 | * without limitations. |
234 | */ | | 234 | */ |
235 | #if !__GNUC_PREREQ__(2, 0) && !defined(__lint__) | | 235 | #if !__GNUC_PREREQ__(2, 0) && !defined(__lint__) |
236 | #define __attribute__(x) | | 236 | #define __attribute__(x) |
237 | #endif | | 237 | #endif |
238 | | | 238 | |
239 | #if __GNUC_PREREQ__(2, 5) || defined(__lint__) | | 239 | #if __GNUC_PREREQ__(2, 5) || defined(__lint__) |
240 | #define __dead __attribute__((__noreturn__)) | | 240 | #define __dead __attribute__((__noreturn__)) |
241 | #elif defined(__GNUC__) | | 241 | #elif defined(__GNUC__) |
242 | #define __dead __volatile | | 242 | #define __dead __volatile |
243 | #else | | 243 | #else |
244 | #define __dead | | 244 | #define __dead |
245 | #endif | | 245 | #endif |
246 | | | 246 | |
247 | #if __GNUC_PREREQ__(2, 96) || defined(__lint__) | | 247 | #if __GNUC_PREREQ__(2, 96) || defined(__lint__) |
248 | #define __pure __attribute__((__pure__)) | | 248 | #define __pure __attribute__((__pure__)) |
249 | #elif defined(__GNUC__) | | 249 | #elif defined(__GNUC__) |
250 | #define __pure __const | | 250 | #define __pure __const |
251 | #else | | 251 | #else |
252 | #define __pure | | 252 | #define __pure |
253 | #endif | | 253 | #endif |
254 | | | 254 | |
255 | #if __GNUC_PREREQ__(2, 5) || defined(__lint__) | | 255 | #if __GNUC_PREREQ__(2, 5) || defined(__lint__) |
256 | #define __constfunc __attribute__((__const__)) | | 256 | #define __constfunc __attribute__((__const__)) |
257 | #else | | 257 | #else |
258 | #define __constfunc | | 258 | #define __constfunc |
259 | #endif | | 259 | #endif |
260 | | | 260 | |
261 | #if __GNUC_PREREQ__(3, 0) || defined(__lint__) | | 261 | #if __GNUC_PREREQ__(3, 0) || defined(__lint__) |
262 | #define __noinline __attribute__((__noinline__)) | | 262 | #define __noinline __attribute__((__noinline__)) |
263 | #else | | 263 | #else |
264 | #define __noinline /* nothing */ | | 264 | #define __noinline /* nothing */ |
265 | #endif | | 265 | #endif |
266 | | | 266 | |
267 | #if __GNUC_PREREQ__(3, 0) || defined(__lint__) | | 267 | #if __GNUC_PREREQ__(3, 0) || defined(__lint__) |
268 | #define __always_inline __attribute__((__always_inline__)) | | 268 | #define __always_inline __attribute__((__always_inline__)) |
269 | #else | | 269 | #else |
270 | #define __always_inline /* nothing */ | | 270 | #define __always_inline /* nothing */ |
271 | #endif | | 271 | #endif |
272 | | | 272 | |
273 | #if __GNUC_PREREQ__(4, 1) || defined(__lint__) | | 273 | #if __GNUC_PREREQ__(4, 1) || defined(__lint__) |
274 | #define __returns_twice __attribute__((__returns_twice__)) | | 274 | #define __returns_twice __attribute__((__returns_twice__)) |
275 | #else | | 275 | #else |
276 | #define __returns_twice /* nothing */ | | 276 | #define __returns_twice /* nothing */ |
277 | #endif | | 277 | #endif |
278 | | | 278 | |
279 | #if __GNUC_PREREQ__(4, 5) || defined(__lint__) | | 279 | #if __GNUC_PREREQ__(4, 5) || defined(__lint__) |
280 | #define __noclone __attribute__((__noclone__)) | | 280 | #define __noclone __attribute__((__noclone__)) |
281 | #else | | 281 | #else |
282 | #define __noclone /* nothing */ | | 282 | #define __noclone /* nothing */ |
283 | #endif | | 283 | #endif |
284 | | | 284 | |
285 | /* | | 285 | /* |
286 | * __unused: Note that item or function might be unused. | | 286 | * __unused: Note that item or function might be unused. |
287 | */ | | 287 | */ |
288 | #if __GNUC_PREREQ__(2, 7) || defined(__lint__) | | 288 | #if __GNUC_PREREQ__(2, 7) || defined(__lint__) |
289 | #define __unused __attribute__((__unused__)) | | 289 | #define __unused __attribute__((__unused__)) |
290 | #else | | 290 | #else |
291 | #define __unused /* delete */ | | 291 | #define __unused /* delete */ |
292 | #endif | | 292 | #endif |
293 | | | 293 | |
294 | /* | | 294 | /* |
295 | * __used: Note that item is needed, even if it appears to be unused. | | 295 | * __used: Note that item is needed, even if it appears to be unused. |
296 | */ | | 296 | */ |
297 | #if __GNUC_PREREQ__(3, 1) || defined(__lint__) | | 297 | #if __GNUC_PREREQ__(3, 1) || defined(__lint__) |
298 | #define __used __attribute__((__used__)) | | 298 | #define __used __attribute__((__used__)) |
299 | #else | | 299 | #else |
300 | #define __used __unused | | 300 | #define __used __unused |
301 | #endif | | 301 | #endif |
302 | | | 302 | |
303 | /* | | 303 | /* |
304 | * __diagused: Note that item is used in diagnostic code, but may be | | 304 | * __diagused: Note that item is used in diagnostic code, but may be |
305 | * unused in non-diagnostic code. | | 305 | * unused in non-diagnostic code. |
306 | */ | | 306 | */ |
307 | #if (defined(_KERNEL) && defined(DIAGNOSTIC)) \ | | 307 | #if (defined(_KERNEL) && defined(DIAGNOSTIC)) \ |
308 | || (!defined(_KERNEL) && !defined(NDEBUG)) | | 308 | || (!defined(_KERNEL) && !defined(NDEBUG)) |
309 | #define __diagused /* empty */ | | 309 | #define __diagused /* empty */ |
310 | #else | | 310 | #else |
311 | #define __diagused __unused | | 311 | #define __diagused __unused |
312 | #endif | | 312 | #endif |
313 | | | 313 | |
314 | /* | | 314 | /* |
315 | * __debugused: Note that item is used in debug code, but may be | | 315 | * __debugused: Note that item is used in debug code, but may be |
316 | * unused in non-debug code. | | 316 | * unused in non-debug code. |
317 | */ | | 317 | */ |
318 | #if defined(DEBUG) | | 318 | #if defined(DEBUG) |
319 | #define __debugused /* empty */ | | 319 | #define __debugused /* empty */ |
320 | #else | | 320 | #else |
321 | #define __debugused __unused | | 321 | #define __debugused __unused |
322 | #endif | | 322 | #endif |
323 | | | 323 | |
324 | #if __GNUC_PREREQ__(3, 1) || defined(__lint__) | | 324 | #if __GNUC_PREREQ__(3, 1) || defined(__lint__) |
325 | #define __noprofile __attribute__((__no_instrument_function__)) | | 325 | #define __noprofile __attribute__((__no_instrument_function__)) |
326 | #else | | 326 | #else |
327 | #define __noprofile /* nothing */ | | 327 | #define __noprofile /* nothing */ |
328 | #endif | | 328 | #endif |
329 | | | 329 | |
330 | #if __GNUC_PREREQ__(4, 6) || defined(__clang__) || defined(__lint__) | | 330 | #if __GNUC_PREREQ__(4, 6) || defined(__clang__) || defined(__lint__) |
331 | #define __unreachable() __builtin_unreachable() | | 331 | #define __unreachable() __builtin_unreachable() |
332 | #else | | 332 | #else |
333 | #define __unreachable() do {} while (/*CONSTCOND*/0) | | 333 | #define __unreachable() do {} while (/*CONSTCOND*/0) |
334 | #endif | | 334 | #endif |
335 | | | 335 | |
336 | #if defined(_KERNEL) || defined(_RUMPKERNEL) | | 336 | #if defined(_KERNEL) || defined(_RUMPKERNEL) |
337 | #if defined(__clang__) && __has_feature(address_sanitizer) | | 337 | #if defined(__clang__) && __has_feature(address_sanitizer) |
338 | #define __noasan __attribute__((no_sanitize("kernel-address", "address"))) | | 338 | #define __noasan __attribute__((no_sanitize("kernel-address", "address"))) |
339 | #elif __GNUC_PREREQ__(4, 9) && defined(__SANITIZE_ADDRESS__) | | 339 | #elif __GNUC_PREREQ__(4, 9) && defined(__SANITIZE_ADDRESS__) |
340 | #define __noasan __attribute__((no_sanitize_address)) | | 340 | #define __noasan __attribute__((no_sanitize_address)) |
341 | #else | | 341 | #else |
342 | #define __noasan /* nothing */ | | 342 | #define __noasan /* nothing */ |
343 | #endif | | 343 | #endif |
344 | | | 344 | |
345 | #if defined(__clang__) && __has_feature(thread_sanitizer) | | 345 | #if defined(__clang__) && __has_feature(thread_sanitizer) |
346 | #define __nocsan __attribute__((no_sanitize("thread"))) | | 346 | #define __nocsan __attribute__((no_sanitize("thread"))) |
347 | #elif __GNUC_PREREQ__(4, 9) && defined(__SANITIZE_THREAD__) | | 347 | #elif __GNUC_PREREQ__(4, 9) && defined(__SANITIZE_THREAD__) |
348 | #define __nocsan __attribute__((no_sanitize_thread)) | | 348 | #define __nocsan __attribute__((no_sanitize_thread)) |
349 | #else | | 349 | #else |
350 | #define __nocsan /* nothing */ | | 350 | #define __nocsan /* nothing */ |
351 | #endif | | 351 | #endif |
352 | | | 352 | |
353 | #if defined(__clang__) && __has_feature(memory_sanitizer) | | 353 | #if defined(__clang__) && __has_feature(memory_sanitizer) |
354 | #define __nomsan __attribute__((no_sanitize("kernel-memory", "memory"))) | | 354 | #define __nomsan __attribute__((no_sanitize("kernel-memory", "memory"))) |
355 | #else | | 355 | #else |
356 | #define __nomsan /* nothing */ | | 356 | #define __nomsan /* nothing */ |
357 | #endif | | 357 | #endif |
358 | | | 358 | |
359 | #if defined(__clang__) && __has_feature(undefined_behavior_sanitizer) | | 359 | #if defined(__clang__) && __has_feature(undefined_behavior_sanitizer) |
360 | #define __noubsan __attribute__((no_sanitize("undefined"))) | | 360 | #define __noubsan __attribute__((no_sanitize("undefined"))) |
361 | #elif __GNUC_PREREQ__(4, 9) && defined(__SANITIZE_UNDEFINED__) | | 361 | #elif __GNUC_PREREQ__(4, 9) && defined(__SANITIZE_UNDEFINED__) |
362 | #define __noubsan __attribute__((no_sanitize_undefined)) | | 362 | #define __noubsan __attribute__((no_sanitize_undefined)) |
363 | #else | | 363 | #else |
364 | #define __noubsan /* nothing */ | | 364 | #define __noubsan /* nothing */ |
365 | #endif | | 365 | #endif |
366 | #endif | | 366 | #endif |
367 | | | 367 | |
368 | #if defined(__COVERITY__) || \ | | 368 | #if defined(__COVERITY__) || \ |
369 | __has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__) ||\ | | 369 | __has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__) ||\ |
370 | __has_feature(leak_sanitizer) || defined(__SANITIZE_LEAK__) | | 370 | __has_feature(leak_sanitizer) || defined(__SANITIZE_LEAK__) |
371 | #define __NO_LEAKS | | 371 | #define __NO_LEAKS |
372 | #endif | | 372 | #endif |
373 | | | 373 | |
374 | /* | | 374 | /* |
375 | * To be used when an empty body is required like: | | 375 | * To be used when an empty body is required like: |
376 | * | | 376 | * |
377 | * #ifdef DEBUG | | 377 | * #ifdef DEBUG |
378 | * # define dprintf(a) printf(a) | | 378 | * # define dprintf(a) printf(a) |
379 | * #else | | 379 | * #else |
380 | * # define dprintf(a) __nothing | | 380 | * # define dprintf(a) __nothing |
381 | * #endif | | 381 | * #endif |
382 | * | | 382 | * |
383 | * We use ((void)0) instead of do {} while (0) so that it | | 383 | * We use ((void)0) instead of do {} while (0) so that it |
384 | * works on , expressions. | | 384 | * works on , expressions. |
385 | */ | | 385 | */ |
386 | #define __nothing (/*LINTED*/(void)0) | | 386 | #define __nothing (/*LINTED*/(void)0) |
387 | | | 387 | |
388 | #if defined(__cplusplus) | | 388 | #if defined(__cplusplus) |
389 | #define __BEGIN_EXTERN_C extern "C" { | | 389 | #define __BEGIN_EXTERN_C extern "C" { |
390 | #define __END_EXTERN_C } | | 390 | #define __END_EXTERN_C } |
391 | #define __static_cast(x,y) static_cast<x>(y) | | 391 | #define __static_cast(x,y) static_cast<x>(y) |
392 | #else | | 392 | #else |
393 | #define __BEGIN_EXTERN_C | | 393 | #define __BEGIN_EXTERN_C |
394 | #define __END_EXTERN_C | | 394 | #define __END_EXTERN_C |
395 | #define __static_cast(x,y) (x)y | | 395 | #define __static_cast(x,y) (x)y |
396 | #endif | | 396 | #endif |
397 | | | 397 | |
398 | #if __GNUC_PREREQ__(4, 0) || defined(__lint__) | | 398 | #if __GNUC_PREREQ__(4, 0) || defined(__lint__) |
399 | # define __dso_public __attribute__((__visibility__("default"))) | | 399 | # define __dso_public __attribute__((__visibility__("default"))) |
400 | # define __dso_hidden __attribute__((__visibility__("hidden"))) | | 400 | # define __dso_hidden __attribute__((__visibility__("hidden"))) |
401 | # define __BEGIN_PUBLIC_DECLS \ | | 401 | # define __BEGIN_PUBLIC_DECLS \ |
402 | _Pragma("GCC visibility push(default)") __BEGIN_EXTERN_C | | 402 | _Pragma("GCC visibility push(default)") __BEGIN_EXTERN_C |
403 | # define __END_PUBLIC_DECLS __END_EXTERN_C _Pragma("GCC visibility pop") | | 403 | # define __END_PUBLIC_DECLS __END_EXTERN_C _Pragma("GCC visibility pop") |
404 | # define __BEGIN_HIDDEN_DECLS \ | | 404 | # define __BEGIN_HIDDEN_DECLS \ |
405 | _Pragma("GCC visibility push(hidden)") __BEGIN_EXTERN_C | | 405 | _Pragma("GCC visibility push(hidden)") __BEGIN_EXTERN_C |
406 | # define __END_HIDDEN_DECLS __END_EXTERN_C _Pragma("GCC visibility pop") | | 406 | # define __END_HIDDEN_DECLS __END_EXTERN_C _Pragma("GCC visibility pop") |
407 | #else | | 407 | #else |
408 | # define __dso_public | | 408 | # define __dso_public |
409 | # define __dso_hidden | | 409 | # define __dso_hidden |
410 | # define __BEGIN_PUBLIC_DECLS __BEGIN_EXTERN_C | | 410 | # define __BEGIN_PUBLIC_DECLS __BEGIN_EXTERN_C |
411 | # define __END_PUBLIC_DECLS __END_EXTERN_C | | 411 | # define __END_PUBLIC_DECLS __END_EXTERN_C |
412 | # define __BEGIN_HIDDEN_DECLS __BEGIN_EXTERN_C | | 412 | # define __BEGIN_HIDDEN_DECLS __BEGIN_EXTERN_C |
413 | # define __END_HIDDEN_DECLS __END_EXTERN_C | | 413 | # define __END_HIDDEN_DECLS __END_EXTERN_C |
414 | #endif | | 414 | #endif |
415 | #if __GNUC_PREREQ__(4, 2) || defined(__lint__) | | 415 | #if __GNUC_PREREQ__(4, 2) || defined(__lint__) |
416 | # define __dso_protected __attribute__((__visibility__("protected"))) | | 416 | # define __dso_protected __attribute__((__visibility__("protected"))) |
417 | #else | | 417 | #else |
418 | # define __dso_protected | | 418 | # define __dso_protected |
419 | #endif | | 419 | #endif |
420 | | | 420 | |
421 | #define __BEGIN_DECLS __BEGIN_PUBLIC_DECLS | | 421 | #define __BEGIN_DECLS __BEGIN_PUBLIC_DECLS |
422 | #define __END_DECLS __END_PUBLIC_DECLS | | 422 | #define __END_DECLS __END_PUBLIC_DECLS |
423 | | | 423 | |
424 | /* | | 424 | /* |
425 | * Non-static C99 inline functions are optional bodies. They don't | | 425 | * Non-static C99 inline functions are optional bodies. They don't |
426 | * create global symbols if not used, but can be replaced if desirable. | | 426 | * create global symbols if not used, but can be replaced if desirable. |
427 | * This differs from the behavior of GCC before version 4.3. The nearest | | 427 | * This differs from the behavior of GCC before version 4.3. The nearest |
428 | * equivalent for older GCC is `extern inline'. For newer GCC, use the | | 428 | * equivalent for older GCC is `extern inline'. For newer GCC, use the |
429 | * gnu_inline attribute additionally to get the old behavior. | | 429 | * gnu_inline attribute additionally to get the old behavior. |
430 | * | | 430 | * |
431 | * For C99 compilers other than GCC, the C99 behavior is expected. | | 431 | * For C99 compilers other than GCC, the C99 behavior is expected. |
432 | */ | | 432 | */ |
433 | #if defined(__GNUC__) && defined(__GNUC_STDC_INLINE__) | | 433 | #if defined(__GNUC__) && defined(__GNUC_STDC_INLINE__) |
434 | #define __c99inline extern __attribute__((__gnu_inline__)) __inline | | 434 | #define __c99inline extern __attribute__((__gnu_inline__)) __inline |
435 | #elif defined(__GNUC__) | | 435 | #elif defined(__GNUC__) |
436 | #define __c99inline extern __inline | | 436 | #define __c99inline extern __inline |
437 | #elif defined(__STDC_VERSION__) || defined(__lint__) | | 437 | #elif defined(__STDC_VERSION__) || defined(__lint__) |
438 | #define __c99inline __inline | | 438 | #define __c99inline __inline |
439 | #endif | | 439 | #endif |
440 | | | 440 | |
441 | #if defined(__lint__) | | 441 | #if defined(__lint__) |
442 | #define __thread /* delete */ | | 442 | #define __thread /* delete */ |
443 | #define __packed __packed | | 443 | #define __packed __packed |
444 | #define __aligned(x) /* delete */ | | 444 | #define __aligned(x) /* delete */ |
445 | #define __section(x) /* delete */ | | 445 | #define __section(x) /* delete */ |
446 | #elif __GNUC_PREREQ__(2, 7) || defined(__PCC__) || defined(__lint__) | | 446 | #elif __GNUC_PREREQ__(2, 7) || defined(__PCC__) || defined(__lint__) |
447 | #define __packed __attribute__((__packed__)) | | 447 | #define __packed __attribute__((__packed__)) |
448 | #define __aligned(x) __attribute__((__aligned__(x))) | | 448 | #define __aligned(x) __attribute__((__aligned__(x))) |
449 | #define __section(x) __attribute__((__section__(x))) | | 449 | #define __section(x) __attribute__((__section__(x))) |
450 | #elif defined(_MSC_VER) | | 450 | #elif defined(_MSC_VER) |
451 | #define __packed /* ignore */ | | 451 | #define __packed /* ignore */ |
452 | #else | | 452 | #else |
453 | #define __packed error: no __packed for this compiler | | 453 | #define __packed error: no __packed for this compiler |
454 | #define __aligned(x) error: no __aligned for this compiler | | 454 | #define __aligned(x) error: no __aligned for this compiler |
455 | #define __section(x) error: no __section for this compiler | | 455 | #define __section(x) error: no __section for this compiler |
456 | #endif | | 456 | #endif |
457 | | | 457 | |
458 | /* | | 458 | /* |
459 | * C99 defines the restrict type qualifier keyword, which was made available | | 459 | * C99 defines the restrict type qualifier keyword, which was made available |
460 | * in GCC 2.92. | | 460 | * in GCC 2.92. |
461 | */ | | 461 | */ |
462 | #if defined(__lint__) | | 462 | #if defined(__lint__) |
463 | #define __restrict /* delete __restrict when not supported */ | | 463 | #define __restrict /* delete __restrict when not supported */ |
464 | #elif __STDC_VERSION__ >= 199901L | | 464 | #elif __STDC_VERSION__ >= 199901L |
465 | #define __restrict restrict | | 465 | #define __restrict restrict |
466 | #elif __GNUC_PREREQ__(2, 92) || defined(__lint__) | | 466 | #elif __GNUC_PREREQ__(2, 92) || defined(__lint__) |
467 | #define __restrict __restrict__ | | 467 | #define __restrict __restrict__ |
468 | #else | | 468 | #else |
469 | #define __restrict /* delete __restrict when not supported */ | | 469 | #define __restrict /* delete __restrict when not supported */ |
470 | #endif | | 470 | #endif |
471 | | | 471 | |
472 | /* | | 472 | /* |
473 | * C99 and C++11 define __func__ predefined identifier, which was made | | 473 | * C99 and C++11 define __func__ predefined identifier, which was made |
474 | * available in GCC 2.95. | | 474 | * available in GCC 2.95. |
475 | */ | | 475 | */ |
476 | #if !(__STDC_VERSION__ >= 199901L) && !(__cplusplus - 0 >= 201103L) | | 476 | #if !(__STDC_VERSION__ >= 199901L) && !(__cplusplus - 0 >= 201103L) |
477 | #if __GNUC_PREREQ__(2, 4) || defined(__lint__) | | 477 | #if __GNUC_PREREQ__(2, 4) || defined(__lint__) |
478 | #define __func__ __FUNCTION__ | | 478 | #define __func__ __FUNCTION__ |
479 | #else | | 479 | #else |
480 | #define __func__ "" | | 480 | #define __func__ "" |
481 | #endif | | 481 | #endif |
482 | #endif /* !(__STDC_VERSION__ >= 199901L) && !(__cplusplus - 0 >= 201103L) */ | | 482 | #endif /* !(__STDC_VERSION__ >= 199901L) && !(__cplusplus - 0 >= 201103L) */ |
483 | | | 483 | |
484 | #if defined(_KERNEL) | | 484 | #if defined(_KERNEL) |
485 | #if defined(NO_KERNEL_RCSIDS) | | 485 | #if defined(NO_KERNEL_RCSIDS) |
486 | #undef __KERNEL_RCSID | | 486 | #undef __KERNEL_RCSID |
487 | #define __KERNEL_RCSID(_n, _s) /* nothing */ | | 487 | #define __KERNEL_RCSID(_n, _s) /* nothing */ |
488 | #endif /* NO_KERNEL_RCSIDS */ | | 488 | #endif /* NO_KERNEL_RCSIDS */ |
489 | #endif /* _KERNEL */ | | 489 | #endif /* _KERNEL */ |
490 | | | 490 | |
491 | #if !defined(_STANDALONE) && !defined(_KERNEL) | | 491 | #if !defined(_STANDALONE) && !defined(_KERNEL) |
492 | #if defined(__GNUC__) || defined(__PCC__) | | 492 | #if defined(__GNUC__) || defined(__PCC__) |
493 | #define __RENAME(x) ___RENAME(x) | | 493 | #define __RENAME(x) ___RENAME(x) |
494 | #elif defined(__lint__) | | 494 | #elif defined(__lint__) |
495 | #define __RENAME(x) __symbolrename(x) | | 495 | #define __RENAME(x) __symbolrename(x) |
496 | #else | | 496 | #else |
497 | #error "No function renaming possible" | | 497 | #error "No function renaming possible" |
498 | #endif /* __GNUC__ */ | | 498 | #endif /* __GNUC__ */ |
499 | #else /* _STANDALONE || _KERNEL */ | | 499 | #else /* _STANDALONE || _KERNEL */ |
500 | #define __RENAME(x) no renaming in kernel/standalone environment | | 500 | #define __RENAME(x) no renaming in kernel/standalone environment |
501 | #endif | | 501 | #endif |
502 | | | 502 | |
503 | /* | | 503 | /* |
504 | * A barrier to stop the optimizer from moving code or assume live | | 504 | * A barrier to stop the optimizer from moving code or assume live |
505 | * register values. This is gcc specific, the version is more or less | | 505 | * register values. This is gcc specific, the version is more or less |
506 | * arbitrary, might work with older compilers. | | 506 | * arbitrary, might work with older compilers. |
507 | */ | | 507 | */ |
508 | #if __GNUC_PREREQ__(2, 95) || defined(__lint__) | | 508 | #if __GNUC_PREREQ__(2, 95) || defined(__lint__) |
509 | #define __insn_barrier() __asm __volatile("":::"memory") | | 509 | #define __insn_barrier() __asm __volatile("":::"memory") |
510 | #else | | 510 | #else |
511 | #define __insn_barrier() /* */ | | 511 | #define __insn_barrier() /* */ |
512 | #endif | | 512 | #endif |
513 | | | 513 | |
514 | /* | | 514 | /* |
515 | * GNU C version 2.96 adds explicit branch prediction so that | | 515 | * GNU C version 2.96 adds explicit branch prediction so that |
516 | * the CPU back-end can hint the processor and also so that | | 516 | * the CPU back-end can hint the processor and also so that |
517 | * code blocks can be reordered such that the predicted path | | 517 | * code blocks can be reordered such that the predicted path |
518 | * sees a more linear flow, thus improving cache behavior, etc. | | 518 | * sees a more linear flow, thus improving cache behavior, etc. |
519 | * | | 519 | * |
520 | * The following two macros provide us with a way to use this | | 520 | * The following two macros provide us with a way to use this |
521 | * compiler feature. Use __predict_true() if you expect the expression | | 521 | * compiler feature. Use __predict_true() if you expect the expression |
522 | * to evaluate to true, and __predict_false() if you expect the | | 522 | * to evaluate to true, and __predict_false() if you expect the |
523 | * expression to evaluate to false. | | 523 | * expression to evaluate to false. |
524 | * | | 524 | * |
525 | * A few notes about usage: | | 525 | * A few notes about usage: |
526 | * | | 526 | * |
527 | * * Generally, __predict_false() error condition checks (unless | | 527 | * * Generally, __predict_false() error condition checks (unless |
528 | * you have some _strong_ reason to do otherwise, in which case | | 528 | * you have some _strong_ reason to do otherwise, in which case |
529 | * document it), and/or __predict_true() `no-error' condition | | 529 | * document it), and/or __predict_true() `no-error' condition |
530 | * checks, assuming you want to optimize for the no-error case. | | 530 | * checks, assuming you want to optimize for the no-error case. |
531 | * | | 531 | * |
532 | * * Other than that, if you don't know the likelihood of a test | | 532 | * * Other than that, if you don't know the likelihood of a test |
533 | * succeeding from empirical or other `hard' evidence, don't | | 533 | * succeeding from empirical or other `hard' evidence, don't |
534 | * make predictions. | | 534 | * make predictions. |
535 | * | | 535 | * |
536 | * * These are meant to be used in places that are run `a lot'. | | 536 | * * These are meant to be used in places that are run `a lot'. |
537 | * It is wasteful to make predictions in code that is run | | 537 | * It is wasteful to make predictions in code that is run |
538 | * seldomly (e.g. at subsystem initialization time) as the | | 538 | * seldomly (e.g. at subsystem initialization time) as the |
539 | * basic block reordering that this affects can often generate | | 539 | * basic block reordering that this affects can often generate |
540 | * larger code. | | 540 | * larger code. |
541 | */ | | 541 | */ |
542 | #if __GNUC_PREREQ__(2, 96) || defined(__lint__) | | 542 | #if __GNUC_PREREQ__(2, 96) || defined(__lint__) |
543 | #define __predict_true(exp) __builtin_expect((exp) != 0, 1) | | 543 | #define __predict_true(exp) __builtin_expect((exp) != 0, 1) |
544 | #define __predict_false(exp) __builtin_expect((exp) != 0, 0) | | 544 | #define __predict_false(exp) __builtin_expect((exp) != 0, 0) |
545 | #else | | 545 | #else |
546 | #define __predict_true(exp) (exp) | | 546 | #define __predict_true(exp) (exp) |
547 | #define __predict_false(exp) (exp) | | 547 | #define __predict_false(exp) (exp) |
548 | #endif | | 548 | #endif |
549 | | | 549 | |
550 | /* | | 550 | /* |
551 | * Compiler-dependent macros to declare that functions take printf-like | | 551 | * Compiler-dependent macros to declare that functions take printf-like |
552 | * or scanf-like arguments. They are null except for versions of gcc | | 552 | * or scanf-like arguments. They are null except for versions of gcc |
553 | * that are known to support the features properly (old versions of gcc-2 | | 553 | * that are known to support the features properly (old versions of gcc-2 |
554 | * didn't permit keeping the keywords out of the application namespace). | | 554 | * didn't permit keeping the keywords out of the application namespace). |
555 | */ | | 555 | */ |
556 | #if __GNUC_PREREQ__(2, 7) || defined(__lint__) | | 556 | #if __GNUC_PREREQ__(2, 7) || defined(__lint__) |
557 | #define __printflike(fmtarg, firstvararg) \ | | 557 | #define __printflike(fmtarg, firstvararg) \ |
558 | __attribute__((__format__ (__printf__, fmtarg, firstvararg))) | | 558 | __attribute__((__format__ (__printf__, fmtarg, firstvararg))) |
559 | #ifndef __syslog_attribute__ | | 559 | #ifndef __syslog_attribute__ |
560 | #define __syslog__ __printf__ | | 560 | #define __syslog__ __printf__ |
561 | #endif | | 561 | #endif |
562 | #define __sysloglike(fmtarg, firstvararg) \ | | 562 | #define __sysloglike(fmtarg, firstvararg) \ |
563 | __attribute__((__format__ (__syslog__, fmtarg, firstvararg))) | | 563 | __attribute__((__format__ (__syslog__, fmtarg, firstvararg))) |
564 | #define __scanflike(fmtarg, firstvararg) \ | | 564 | #define __scanflike(fmtarg, firstvararg) \ |
565 | __attribute__((__format__ (__scanf__, fmtarg, firstvararg))) | | 565 | __attribute__((__format__ (__scanf__, fmtarg, firstvararg))) |
566 | #define __format_arg(fmtarg) __attribute__((__format_arg__ (fmtarg))) | | 566 | #define __format_arg(fmtarg) __attribute__((__format_arg__ (fmtarg))) |
567 | #else | | 567 | #else |
568 | #define __printflike(fmtarg, firstvararg) /* nothing */ | | 568 | #define __printflike(fmtarg, firstvararg) /* nothing */ |
569 | #define __scanflike(fmtarg, firstvararg) /* nothing */ | | 569 | #define __scanflike(fmtarg, firstvararg) /* nothing */ |
570 | #define __sysloglike(fmtarg, firstvararg) /* nothing */ | | 570 | #define __sysloglike(fmtarg, firstvararg) /* nothing */ |
571 | #define __format_arg(fmtarg) /* nothing */ | | 571 | #define __format_arg(fmtarg) /* nothing */ |
572 | #endif | | 572 | #endif |
573 | | | 573 | |
574 | /* | | 574 | /* |
575 | * Macros for manipulating "link sets". Link sets are arrays of pointers | | 575 | * Macros for manipulating "link sets". Link sets are arrays of pointers |
576 | * to objects, which are gathered up by the linker. | | 576 | * to objects, which are gathered up by the linker. |
577 | * | | 577 | * |
578 | * Object format-specific code has provided us with the following macros: | | 578 | * Object format-specific code has provided us with the following macros: |
579 | * | | 579 | * |
580 | * __link_set_add_text(set, sym) | | 580 | * __link_set_add_text(set, sym) |
581 | * Add a reference to the .text symbol `sym' to `set'. | | 581 | * Add a reference to the .text symbol `sym' to `set'. |
582 | * | | 582 | * |
583 | * __link_set_add_rodata(set, sym) | | 583 | * __link_set_add_rodata(set, sym) |
584 | * Add a reference to the .rodata symbol `sym' to `set'. | | 584 | * Add a reference to the .rodata symbol `sym' to `set'. |
585 | * | | 585 | * |
586 | * __link_set_add_data(set, sym) | | 586 | * __link_set_add_data(set, sym) |
587 | * Add a reference to the .data symbol `sym' to `set'. | | 587 | * Add a reference to the .data symbol `sym' to `set'. |
588 | * | | 588 | * |
589 | * __link_set_add_bss(set, sym) | | 589 | * __link_set_add_bss(set, sym) |
590 | * Add a reference to the .bss symbol `sym' to `set'. | | 590 | * Add a reference to the .bss symbol `sym' to `set'. |
591 | * | | 591 | * |
592 | * __link_set_decl(set, ptype) | | 592 | * __link_set_decl(set, ptype) |
593 | * Provide an extern declaration of the set `set', which | | 593 | * Provide an extern declaration of the set `set', which |
594 | * contains an array of pointers to type `ptype'. This | | 594 | * contains an array of pointers to type `ptype'. This |
595 | * macro must be used by any code which wishes to reference | | 595 | * macro must be used by any code which wishes to reference |
596 | * the elements of a link set. | | 596 | * the elements of a link set. |
597 | * | | 597 | * |
598 | * __link_set_start(set) | | 598 | * __link_set_start(set) |
599 | * This points to the first slot in the link set. | | 599 | * This points to the first slot in the link set. |
600 | * | | 600 | * |
601 | * __link_set_end(set) | | 601 | * __link_set_end(set) |
602 | * This points to the (non-existent) slot after the last | | 602 | * This points to the (non-existent) slot after the last |
603 | * entry in the link set. | | 603 | * entry in the link set. |
604 | * | | 604 | * |
605 | * __link_set_count(set) | | 605 | * __link_set_count(set) |
606 | * Count the number of entries in link set `set'. | | 606 | * Count the number of entries in link set `set'. |
607 | * | | 607 | * |
608 | * In addition, we provide the following macros for accessing link sets: | | 608 | * In addition, we provide the following macros for accessing link sets: |
609 | * | | 609 | * |
610 | * __link_set_foreach(pvar, set) | | 610 | * __link_set_foreach(pvar, set) |
611 | * Iterate over the link set `set'. Because a link set is | | 611 | * Iterate over the link set `set'. Because a link set is |
612 | * an array of pointers, pvar must be declared as "type **pvar", | | 612 | * an array of pointers, pvar must be declared as "type **pvar", |
613 | * and the actual entry accessed as "*pvar". | | 613 | * and the actual entry accessed as "*pvar". |
614 | * | | 614 | * |
615 | * __link_set_entry(set, idx) | | 615 | * __link_set_entry(set, idx) |
616 | * Access the link set entry at index `idx' from set `set'. | | 616 | * Access the link set entry at index `idx' from set `set'. |
617 | */ | | 617 | */ |
618 | #define __link_set_foreach(pvar, set) \ | | 618 | #define __link_set_foreach(pvar, set) \ |
619 | for (pvar = __link_set_start(set); pvar < __link_set_end(set); pvar++) | | 619 | for (pvar = __link_set_start(set); pvar < __link_set_end(set); pvar++) |
620 | | | 620 | |
621 | #define __link_set_entry(set, idx) (__link_set_start(set)[idx]) | | 621 | #define __link_set_entry(set, idx) (__link_set_start(set)[idx]) |
622 | | | 622 | |
623 | /* | | 623 | /* |
624 | * Return the natural alignment in bytes for the given type | | 624 | * Return the natural alignment in bytes for the given type |
625 | */ | | 625 | */ |
626 | #if __GNUC_PREREQ__(4, 1) || defined(__lint__) | | 626 | #if __GNUC_PREREQ__(4, 1) || defined(__lint__) |
627 | #define __alignof(__t) __alignof__(__t) | | 627 | #define __alignof(__t) __alignof__(__t) |
628 | #else | | 628 | #else |
629 | #define __alignof(__t) (sizeof(struct { char __x; __t __y; }) - sizeof(__t)) | | 629 | #define __alignof(__t) (sizeof(struct { char __x; __t __y; }) - sizeof(__t)) |
630 | #endif | | 630 | #endif |
631 | | | 631 | |
632 | /* | | 632 | /* |
633 | * Return the number of elements in a statically-allocated array, | | 633 | * Return the number of elements in a statically-allocated array, |
634 | * __x. | | 634 | * __x. |
635 | */ | | 635 | */ |
636 | #define __arraycount(__x) (sizeof(__x) / sizeof(__x[0])) | | 636 | #define __arraycount(__x) (sizeof(__x) / sizeof(__x[0])) |
637 | | | 637 | |
638 | #ifndef __ASSEMBLER__ | | 638 | #ifndef __ASSEMBLER__ |
639 | /* __BIT(n): nth bit, where __BIT(0) == 0x1. */ | | 639 | /* __BIT(n): nth bit, where __BIT(0) == 0x1. */ |
640 | #define __BIT(__n) \ | | 640 | #define __BIT(__n) \ |
641 | (((uintmax_t)(__n) >= NBBY * sizeof(uintmax_t)) ? 0 : \ | | 641 | (((uintmax_t)(__n) >= NBBY * sizeof(uintmax_t)) ? 0 : \ |
642 | ((uintmax_t)1 << (uintmax_t)((__n) & (NBBY * sizeof(uintmax_t) - 1)))) | | 642 | ((uintmax_t)1 << (uintmax_t)((__n) & (NBBY * sizeof(uintmax_t) - 1)))) |
643 | | | 643 | |
644 | /* Macros for min/max. */ | | 644 | /* Macros for min/max. */ |
645 | #define __MIN(a,b) ((/*CONSTCOND*/(a)<=(b))?(a):(b)) | | 645 | #define __MIN(a,b) ((/*CONSTCOND*/(a)<=(b))?(a):(b)) |
646 | #define __MAX(a,b) ((/*CONSTCOND*/(a)>(b))?(a):(b)) | | 646 | #define __MAX(a,b) ((/*CONSTCOND*/(a)>(b))?(a):(b)) |
647 | | | 647 | |
648 | /* __BITS(m, n): bits m through n, m < n. */ | | 648 | /* __BITS(m, n): bits m through n, m < n. */ |
649 | #define __BITS(__m, __n) \ | | 649 | #define __BITS(__m, __n) \ |
650 | ((__BIT(__MAX((__m), (__n)) + 1) - 1) ^ (__BIT(__MIN((__m), (__n))) - 1)) | | 650 | ((__BIT(__MAX((__m), (__n)) + 1) - 1) ^ (__BIT(__MIN((__m), (__n))) - 1)) |
651 | #endif /* !__ASSEMBLER__ */ | | 651 | #endif /* !__ASSEMBLER__ */ |
652 | | | 652 | |
653 | /* find least significant bit that is set */ | | 653 | /* find least significant bit that is set */ |
654 | #define __LOWEST_SET_BIT(__mask) ((((__mask) - 1) & (__mask)) ^ (__mask)) | | 654 | #define __LOWEST_SET_BIT(__mask) ((((__mask) - 1) & (__mask)) ^ (__mask)) |
655 | | | 655 | |
656 | #define __PRIuBIT PRIuMAX | | 656 | #define __PRIuBIT PRIuMAX |
657 | #define __PRIuBITS __PRIuBIT | | 657 | #define __PRIuBITS __PRIuBIT |
658 | | | 658 | |
659 | #define __PRIxBIT PRIxMAX | | 659 | #define __PRIxBIT PRIxMAX |
660 | #define __PRIxBITS __PRIxBIT | | 660 | #define __PRIxBITS __PRIxBIT |
661 | | | 661 | |
662 | #define __SHIFTOUT(__x, __mask) (((__x) & (__mask)) / __LOWEST_SET_BIT(__mask)) | | 662 | #define __SHIFTOUT(__x, __mask) (((__x) & (__mask)) / __LOWEST_SET_BIT(__mask)) |
663 | #define __SHIFTIN(__x, __mask) ((__x) * __LOWEST_SET_BIT(__mask)) | | 663 | #define __SHIFTIN(__x, __mask) ((__x) * __LOWEST_SET_BIT(__mask)) |
664 | #define __SHIFTOUT_MASK(__mask) __SHIFTOUT((__mask), (__mask)) | | 664 | #define __SHIFTOUT_MASK(__mask) __SHIFTOUT((__mask), (__mask)) |
665 | | | 665 | |
666 | /* | | 666 | /* |
667 | * Only to be used in other headers that are included from both c or c++ | | 667 | * Only to be used in other headers that are included from both c or c++ |
668 | * NOT to be used in code. | | 668 | * NOT to be used in code. |
669 | */ | | 669 | */ |
670 | #ifdef __cplusplus | | 670 | #ifdef __cplusplus |
671 | #define __CAST(__dt, __st) static_cast<__dt>(__st) | | 671 | #define __CAST(__dt, __st) static_cast<__dt>(__st) |
672 | #else | | 672 | #else |
673 | #define __CAST(__dt, __st) ((__dt)(__st)) | | 673 | #define __CAST(__dt, __st) ((__dt)(__st)) |
674 | #endif | | 674 | #endif |
675 | | | 675 | |
676 | #define __CASTV(__dt, __st) __CAST(__dt, __CAST(void *, __st)) | | 676 | #define __CASTV(__dt, __st) __CAST(__dt, __CAST(void *, __st)) |
677 | #define __CASTCV(__dt, __st) __CAST(__dt, __CAST(const void *, __st)) | | 677 | #define __CASTCV(__dt, __st) __CAST(__dt, __CAST(const void *, __st)) |
678 | | | 678 | |
679 | #define __USE(a) (/*LINTED*/(void)(a)) | | 679 | #define __USE(a) (/*LINTED*/(void)(a)) |
680 | | | 680 | |
681 | #define __type_mask(t) (/*LINTED*/sizeof(t) < sizeof(intmax_t) ? \ | | 681 | #define __type_mask(t) (/*LINTED*/sizeof(t) < sizeof(intmax_t) ? \ |
682 | (~((1ULL << (sizeof(t) * NBBY)) - 1)) : 0ULL) | | 682 | (~((1ULL << (sizeof(t) * NBBY)) - 1)) : 0ULL) |
683 | | | 683 | |
684 | #ifndef __ASSEMBLER__ | | 684 | #ifndef __ASSEMBLER__ |
685 | static __inline long long __zeroll(void) { return 0; } | | 685 | static __inline long long __zeroll(void) { return 0; } |
686 | static __inline unsigned long long __zeroull(void) { return 0; } | | 686 | static __inline unsigned long long __zeroull(void) { return 0; } |
687 | #else | | 687 | #else |
688 | #define __zeroll() (0LL) | | 688 | #define __zeroll() (0LL) |
689 | #define __zeroull() (0ULL) | | 689 | #define __zeroull() (0ULL) |
690 | #endif | | 690 | #endif |
691 | | | 691 | |
692 | #define __negative_p(x) (!((x) > 0) && ((x) != 0)) | | 692 | #define __negative_p(x) (!((x) > 0) && ((x) != 0)) |
693 | | | 693 | |
694 | #define __type_min_s(t) ((t)((1ULL << (sizeof(t) * NBBY - 1)))) | | 694 | #define __type_min_s(t) ((t)((1ULL << (sizeof(t) * NBBY - 1)))) |
695 | #define __type_max_s(t) ((t)~((1ULL << (sizeof(t) * NBBY - 1)))) | | 695 | #define __type_max_s(t) ((t)~((1ULL << (sizeof(t) * NBBY - 1)))) |
696 | #define __type_min_u(t) ((t)0ULL) | | 696 | #define __type_min_u(t) ((t)0ULL) |
697 | #define __type_max_u(t) ((t)~0ULL) | | 697 | #define __type_max_u(t) ((t)~0ULL) |
698 | #define __type_is_signed(t) (/*LINTED*/__type_min_s(t) + (t)1 < (t)1) | | 698 | #define __type_is_signed(t) (/*LINTED*/__type_min_s(t) + (t)1 < (t)1) |
699 | #define __type_min(t) (__type_is_signed(t) ? __type_min_s(t) : __type_min_u(t)) | | 699 | #define __type_min(t) (__type_is_signed(t) ? __type_min_s(t) : __type_min_u(t)) |
700 | #define __type_max(t) (__type_is_signed(t) ? __type_max_s(t) : __type_max_u(t)) | | 700 | #define __type_max(t) (__type_is_signed(t) ? __type_max_s(t) : __type_max_u(t)) |
701 | | | 701 | |
702 | | | 702 | |
703 | #define __type_fit_u(t, a) (/*LINTED*/!__negative_p(a) && \ | | 703 | #define __type_fit_u(t, a) (/*LINTED*/!__negative_p(a) && \ |
704 | (uintmax_t)((a) + __zeroull()) <= (uintmax_t)__type_max_u(t)) | | 704 | (uintmax_t)((a) + __zeroull()) <= (uintmax_t)__type_max_u(t)) |
705 | | | 705 | |
706 | #define __type_fit_s(t, a) (/*LINTED*/__negative_p(a) ? \ | | 706 | #define __type_fit_s(t, a) (/*LINTED*/__negative_p(a) ? \ |
707 | ((intmax_t)((a) + __zeroll()) >= (intmax_t)__type_min_s(t)) : \ | | 707 | ((intmax_t)((a) + __zeroll()) >= (intmax_t)__type_min_s(t)) : \ |
708 | ((intmax_t)((a) + __zeroll()) >= (intmax_t)0 && \ | | 708 | ((intmax_t)((a) + __zeroll()) >= (intmax_t)0 && \ |
709 | (intmax_t)((a) + __zeroll()) <= (intmax_t)__type_max_s(t))) | | 709 | (intmax_t)((a) + __zeroll()) <= (intmax_t)__type_max_s(t))) |
710 | | | 710 | |
711 | /* | | 711 | /* |
712 | * return true if value 'a' fits in type 't' | | 712 | * return true if value 'a' fits in type 't' |
713 | */ | | 713 | */ |
714 | #define __type_fit(t, a) (__type_is_signed(t) ? \ | | 714 | #define __type_fit(t, a) (__type_is_signed(t) ? \ |
715 | __type_fit_s(t, a) : __type_fit_u(t, a)) | | 715 | __type_fit_s(t, a) : __type_fit_u(t, a)) |
716 | | | 716 | |
717 | #endif /* !_SYS_CDEFS_H_ */ | | 717 | #endif /* !_SYS_CDEFS_H_ */ |