| 1 | /* |
| 2 | * Copyright (c) 1991, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * |
| 5 | * This code is derived from software contributed to Berkeley by |
| 6 | * Berkeley Software Design, Inc. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. All advertising materials mentioning features or use of this software |
| 17 | * must display the following acknowledgement: |
| 18 | * This product includes software developed by the University of |
| 19 | * California, Berkeley and its contributors. |
| 20 | * 4. Neither the name of the University nor the names of its contributors |
| 21 | * may be used to endorse or promote products derived from this software |
| 22 | * without specific prior written permission. |
| 23 | * |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 34 | * SUCH DAMAGE. |
| 35 | * |
| 36 | * @(#)cdefs.h 8.8 (Berkeley) 1/9/95 |
| 37 | * $FreeBSD: src/sys/sys/cdefs.h,v 1.28.2.8 2002/09/18 04:05:13 mikeh Exp $ |
| 38 | */ |
| 39 | |
| 40 | #ifndef _SYS_CDEFS_H_ |
| 41 | #define _SYS_CDEFS_H_ |
| 42 | |
| 43 | /* |
| 44 | * Macro to test if we are using a specific version of gcc or later. |
| 45 | */ |
| 46 | #if defined(__GNUC__) && !defined(__INTEL_COMPILER) |
| 47 | #define __GNUC_PREREQ__(ma, mi) \ |
| 48 | (__GNUC__ > (ma) || __GNUC__ == (ma) && __GNUC_MINOR__ >= (mi)) |
| 49 | #else |
| 50 | #define __GNUC_PREREQ__(ma, mi) 0 |
| 51 | #endif |
| 52 | |
| 53 | #if defined(__cplusplus) |
| 54 | #if __GNUC_PREREQ__(4, 0) |
| 55 | #define __BEGIN_DECLS _Pragma("GCC visibility push(default)") extern "C" { |
| 56 | #define __END_DECLS } _Pragma("GCC visibility pop") |
| 57 | #else |
| 58 | #define __BEGIN_DECLS extern "C" { |
| 59 | #define __END_DECLS } |
| 60 | #endif |
| 61 | #else |
| 62 | #define __BEGIN_DECLS |
| 63 | #define __END_DECLS |
| 64 | #endif |
| 65 | |
| 66 | /* |
| 67 | * The __VM_CACHELINE_SIZE macro defines the common cache line alignment |
| 68 | * size that can be found across most recent and somewhat latest Intel |
| 69 | * hardware, i.e. L1 cache sizes etc. |
| 70 | * |
| 71 | * If needed, this value can be TUNED. Suitable values for this macro |
| 72 | * are 32, 64 and 128 bytes. The unit of measurement for this macro is |
| 73 | * bytes. |
| 74 | * |
| 75 | * XXX: This macro and related macros will eventually move to a MD |
| 76 | * header, but currently, we do need such a hierarchy. |
| 77 | */ |
| 78 | #define __VM_CACHELINE_SIZE 64 |
| 79 | #define __VM_CACHELINE_MASK (__VM_CACHELINE_SIZE - 1) |
| 80 | #define __VM_CACHELINE_ALIGN(n) \ |
| 81 | (((n) + __VM_CACHELINE_MASK) & ~__VM_CACHELINE_MASK) |
| 82 | |
| 83 | /* |
| 84 | * The __CONCAT macro is used to concatenate parts of symbol names, e.g. |
| 85 | * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo. |
| 86 | * The __CONCAT macro is a bit tricky to use if it must work in non-ANSI |
| 87 | * mode -- there must be no spaces between its arguments, and for nested |
| 88 | * __CONCAT's, all the __CONCAT's must be at the left. __CONCAT can also |
| 89 | * concatenate double-quoted strings produced by the __STRING macro, but |
| 90 | * this only works with ANSI C. |
| 91 | * |
| 92 | * __XSTRING is like __STRING, but it expands any macros in its argument |
| 93 | * first. It is only available with ANSI C. |
| 94 | */ |
| 95 | #if defined(__STDC__) || defined(__cplusplus) |
| 96 | #define __P(protos) protos /* full-blown ANSI C */ |
| 97 | #define __CONCAT1(x,y) x ## y |
| 98 | #define __CONCAT(x,y) __CONCAT1(x,y) |
| 99 | #define __STRING(x) #x /* stringify without expanding x */ |
| 100 | #define __XSTRING(x) __STRING(x) /* expand x, then stringify */ |
| 101 | |
| 102 | #define __const const /* define reserved names to standard */ |
| 103 | #define __signed signed |
| 104 | #define __volatile volatile |
| 105 | #if defined(__cplusplus) |
| 106 | #define __inline inline /* convert to C++ keyword */ |
| 107 | #else |
| 108 | #ifndef __GNUC__ |
| 109 | #define __inline /* delete GCC keyword */ |
| 110 | #endif /* !__GNUC__ */ |
| 111 | #endif /* !__cplusplus */ |
| 112 | |
| 113 | #else /* !(__STDC__ || __cplusplus) */ |
| 114 | #define __P(protos) () /* traditional C preprocessor */ |
| 115 | #define __CONCAT(x,y) x/**/y |
| 116 | #define __STRING(x) "x" |
| 117 | |
| 118 | #ifndef __GNUC__ |
| 119 | #define __const /* delete pseudo-ANSI C keywords */ |
| 120 | #define __inline |
| 121 | #define __signed |
| 122 | #define __volatile |
| 123 | /* |
| 124 | * In non-ANSI C environments, new programs will want ANSI-only C keywords |
| 125 | * deleted from the program and old programs will want them left alone. |
| 126 | * When using a compiler other than gcc, programs using the ANSI C keywords |
| 127 | * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS. |
| 128 | * When using "gcc -traditional", we assume that this is the intent; if |
| 129 | * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone. |
| 130 | */ |
| 131 | #ifndef NO_ANSI_KEYWORDS |
| 132 | #define const /* delete ANSI C keywords */ |
| 133 | #define inline |
| 134 | #define signed |
| 135 | #define volatile |
| 136 | #endif /* !NO_ANSI_KEYWORDS */ |
| 137 | #endif /* !__GNUC__ */ |
| 138 | #endif /* !(__STDC__ || __cplusplus) */ |
| 139 | |
| 140 | /* |
| 141 | * Compiler-dependent macros to help declare dead (non-returning) and |
| 142 | * pure (no side effects) functions, and unused variables. They are |
| 143 | * null except for versions of gcc that are known to support the features |
| 144 | * properly (old versions of gcc-2 supported the dead and pure features |
| 145 | * in a different (wrong) way). |
| 146 | */ |
| 147 | #ifdef lint |
| 148 | |
| 149 | #define __dead2 |
| 150 | #define __pure |
| 151 | #define __pure2 |
| 152 | #define __unused |
| 153 | #define __packed |
| 154 | #define __aligned(x) |
| 155 | #define __section(x) |
| 156 | #define __always_inline |
| 157 | #define __nonnull(x) |
| 158 | |
| 159 | #else |
| 160 | |
| 161 | #if !__GNUC_PREREQ__(2, 7) |
| 162 | #define __dead2 |
| 163 | #define __pure2 |
| 164 | #define __unused |
| 165 | #endif |
| 166 | |
| 167 | #if __GNUC_PREREQ__(2, 7) |
| 168 | #define __dead2 __attribute__((__noreturn__)) |
| 169 | #define __pure2 __attribute__((__const__)) |
| 170 | #define __unused __attribute__((__unused__)) |
| 171 | #define __packed __attribute__((__packed__)) |
| 172 | #define __aligned(x) __attribute__((__aligned__(x))) |
| 173 | #define __section(x) __attribute__((__section__(x))) |
| 174 | #endif |
| 175 | |
| 176 | #if __GNUC_PREREQ__(2, 96) |
| 177 | #define __pure __attribute__((__pure__)) |
| 178 | #else |
| 179 | #define __pure __pure2 |
| 180 | #endif |
| 181 | |
| 182 | #if __GNUC_PREREQ__(3, 1) |
| 183 | #define __always_inline __attribute__((__always_inline__)) |
| 184 | #define __noinline __attribute__((__noinline__)) |
| 185 | #else |
| 186 | #define __always_inline |
| 187 | #define __noinline |
| 188 | #endif |
| 189 | |
| 190 | #if __GNUC_PREREQ__(3, 3) |
| 191 | #define __nonnull(x) __attribute__((__nonnull__(x))) |
| 192 | #define __used __attribute__((__used__)) |
| 193 | #else |
| 194 | #define __nonnull(x) |
| 195 | #define __used __unused |
| 196 | #endif |
| 197 | |
| 198 | #endif /* LINT */ |
| 199 | |
| 200 | #if !__GNUC_PREREQ__(2, 7) && __STDC_VERSION < 199901 |
| 201 | #define __func__ NULL |
| 202 | #endif |
| 203 | |
| 204 | #if (__GNUC_PREREQ__(2, 0) && !defined(__STRICT_ANSI)) || \ |
| 205 | __STDC_VERSION__ >= 199901 |
| 206 | #define __LONG_LONG_SUPPORTED |
| 207 | #endif |
| 208 | |
| 209 | /* |
| 210 | * GNU C version 2.96 adds explicit branch prediction so that |
| 211 | * the CPU back-end can hint the processor and also so that |
| 212 | * code blocks can be reordered such that the predicted path |
| 213 | * sees a more linear flow, thus improving cache behavior, etc. |
| 214 | * |
| 215 | * The following two macros provide us with a way to utilize this |
| 216 | * compiler feature. Use __predict_true() if you expect the expression |
| 217 | * to evaluate to true, and __predict_false() if you expect the |
| 218 | * expression to evaluate to false. |
| 219 | * |
| 220 | * A few notes about usage: |
| 221 | * |
| 222 | * * Generally, __predict_false() error condition checks (unless |
| 223 | * you have some _strong_ reason to do otherwise, in which case |
| 224 | * document it), and/or __predict_true() `no-error' condition |
| 225 | * checks, assuming you want to optimize for the no-error case. |
| 226 | * |
| 227 | * * Other than that, if you don't know the likelihood of a test |
| 228 | * succeeding from empirical or other `hard' evidence, don't |
| 229 | * make predictions. |
| 230 | * |
| 231 | * * These are meant to be used in places that are run `a lot'. |
| 232 | * It is wasteful to make predictions in code that is run |
| 233 | * seldomly (e.g. at subsystem initialization time) as the |
| 234 | * basic block reordering that this affects can often generate |
| 235 | * larger code. |
| 236 | */ |
| 237 | #if __GNUC_PREREQ__(2, 96) |
| 238 | #define __predict_true(exp) __builtin_expect((exp), 1) |
| 239 | #define __predict_false(exp) __builtin_expect((exp), 0) |
| 240 | #else |
| 241 | #define __predict_true(exp) (exp) |
| 242 | #define __predict_false(exp) (exp) |
| 243 | #endif |
| 244 | |
| 245 | /* |
| 246 | * GCC 2.95 and later provides `__restrict' as an extention to C90 to support |
| 247 | * the C99-specific `restrict' type qualifier. We happen to use `__restrict' |
| 248 | * as a way to define the `restrict' type qualifier without disturbing older |
| 249 | * software that is unaware of C99 keywords. |
| 250 | */ |
| 251 | #if !__GNUC_PREREQ__(2, 95) |
| 252 | #if __STDC_VERSION__ < 199901 |
| 253 | #define __restrict |
| 254 | #else |
| 255 | #define __restrict restrict |
| 256 | #endif |
| 257 | #endif |
| 258 | |
| 259 | /* |
| 260 | * Compiler-dependent macros to declare that functions take printf-like |
| 261 | * or scanf-like arguments. They are null except for versions of gcc |
| 262 | * that are known to support the features properly (old versions of gcc-2 |
| 263 | * didn't permit keeping the keywords out of the application namespace). |
| 264 | * |
| 265 | * The printf0like macro for GCC 2 uses DragonFly specific compiler extensions. |
| 266 | */ |
| 267 | #if !__GNUC_PREREQ__(2, 7) |
| 268 | #define __printflike(fmtarg, firstvararg) |
| 269 | #define __scanflike(fmtarg, firstvararg) |
| 270 | #define __printf0like(fmtarg, firstvararg) |
| 271 | #define __format_arg(fmtarg) |
| 272 | #elif __GNUC_PREREQ__(3, 0) |
| 273 | #define __printflike(fmtarg, firstvararg) \ |
| 274 | __attribute__((__nonnull__(fmtarg), \ |
| 275 | __format__ (__printf__, fmtarg, firstvararg))) |
| 276 | #define __printf0like(fmtarg, firstvararg) \ |
| 277 | __attribute__((__format__ (__printf__, fmtarg, firstvararg))) |
| 278 | #define __scanflike(fmtarg, firstvararg) \ |
| 279 | __attribute__((__format__ (__scanf__, fmtarg, firstvararg))) |
| 280 | #define __format_arg(fmtarg) \ |
| 281 | __attribute__((__format_arg__ (fmtarg))) |
| 282 | |
| 283 | #else |
| 284 | #define __printflike(fmtarg, firstvararg) \ |
| 285 | __attribute__((__format__ (__printf__, fmtarg, firstvararg))) |
| 286 | #define __printf0like(fmtarg, firstvararg) \ |
| 287 | __attribute__((__format__ (__printf0__, fmtarg, firstvararg))) |
| 288 | #define __scanflike(fmtarg, firstvararg) \ |
| 289 | __attribute__((__format__ (__scanf__, fmtarg, firstvararg))) |
| 290 | #define __format_arg(fmtarg) \ |
| 291 | __attribute__((__format_arg__ (fmtarg))) |
| 292 | |
| 293 | #endif |
| 294 | |
| 295 | #if !__GNUC_PREREQ__(3, 0) |
| 296 | #define __ARRAY_ZERO 0 |
| 297 | #else |
| 298 | #define __ARRAY_ZERO |
| 299 | #endif |
| 300 | |
| 301 | #if __GNUC_PREREQ__(4, 0) |
| 302 | #define __dso_public __attribute__((__visibility__("default"))) |
| 303 | #define __dso_hidden __attribute__((__visibility__("hidden"))) |
| 304 | #else |
| 305 | #define __dso_public |
| 306 | #define __dso_hidden |
| 307 | #endif |
| 308 | |
| 309 | /* |
| 310 | * A convenient constructor macro, GCC 4.3.0 added priority support to |
| 311 | * constructors, provide a compatible interface for both. |
| 312 | */ |
| 313 | #if __GNUC_PREREQ__(4, 3) |
| 314 | #define __constructor(prio) __attribute__((constructor(prio))) |
| 315 | #else |
| 316 | #define __constructor(prio) __attribute__((constructor)) |
| 317 | #endif |
| 318 | |
| 319 | /* |
| 320 | * Handy GCC based macros: |
| 321 | * |
| 322 | * __cachealign: |
| 323 | * |
| 324 | * The __cachealign macro can be used for cache line aligning structures |
| 325 | * of small to medium size. It aligns the particular structure or |
| 326 | * storage type to a system default cache line alignment, thus giving us |
| 327 | * a much more better cache utilization by making the hardware work at |
| 328 | * its best burst speeds. |
| 329 | * |
| 330 | * __usereg: |
| 331 | * |
| 332 | * The __usereg macro can/should be used when a function contains |
| 333 | * arguments not more than 3. It can be very useful to us due to the |
| 334 | * message-passing nature of the kernel. |
| 335 | * |
| 336 | * !!NOTE - USAGE INFORMATION!! |
| 337 | * |
| 338 | * The __cachealign macro should not be used for data structures that are |
| 339 | * as big struct proc, struct vnode, struct thread, and other structs which |
| 340 | * are as big as them; simply because it will be useless in that case. |
| 341 | * |
| 342 | * The __usereg macro should be used whenever possible, i.e., when a function |
| 343 | * does not exceed more than 3 arguments, and should not be used for vararg |
| 344 | * type functions. |
| 345 | * |
| 346 | * In other words, AVOID MISUSE OF THESE MACROS. :-) |
| 347 | */ |
| 348 | #ifdef __GNUC__ |
| 349 | #define __cachealign __attribute__((__aligned__(__VM_CACHELINE_SIZE))) |
| 350 | #define __usereg __attribute__((__regparm__(3))) |
| 351 | #else |
| 352 | #define __cachealign |
| 353 | #define __usereg |
| 354 | #endif |
| 355 | |
| 356 | #ifdef __GNUC__ |
| 357 | #define __strong_reference(sym,aliassym) \ |
| 358 | extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym))); |
| 359 | #define __weak_reference(sym,alias) \ |
| 360 | __asm__(".weak " #alias); \ |
| 361 | __asm__(".equ " #alias ", " #sym) |
| 362 | #define __warn_references(sym,msg) \ |
| 363 | __asm__(".section .gnu.warning." #sym); \ |
| 364 | __asm__(".asciz \"" msg "\""); \ |
| 365 | __asm__(".previous") |
| 366 | #endif /* __GNUC__ */ |
| 367 | |
| 368 | #if defined(__GNUC__) |
| 369 | #define __IDSTRING(name,string) __asm__(".ident\t\"" string "\"") |
| 370 | #endif |
| 371 | |
| 372 | #ifndef __RCSID |
| 373 | #define __RCSID(s) __IDSTRING(rcsid,s) |
| 374 | #endif |
| 375 | |
| 376 | #ifndef __RCSID_SOURCE |
| 377 | #define __RCSID_SOURCE(s) __IDSTRING(rcsid_source,s) |
| 378 | #endif |
| 379 | |
| 380 | #ifndef __COPYRIGHT |
| 381 | #define __COPYRIGHT(s) __IDSTRING(copyright,s) |
| 382 | #endif |
| 383 | |
| 384 | #ifndef __DECONST |
| 385 | #define __DECONST(type, var) ((type)(uintptr_t)(const void *)(var)) |
| 386 | #endif |
| 387 | |
| 388 | #ifndef __DEVOLATILE |
| 389 | #define __DEVOLATILE(type, var) ((type)(uintptr_t)(volatile void *)(var)) |
| 390 | #endif |
| 391 | |
| 392 | #ifndef __DEQUALIFY |
| 393 | #define __DEQUALIFY(type, var) ((type)(uintptr_t)(const volatile void *)(var)) |
| 394 | #endif |
| 395 | |
| 396 | /*- |
| 397 | * The following definitions are an extension of the behavior originally |
| 398 | * implemented in <sys/_posix.h>, but with a different level of granularity. |
| 399 | * POSIX.1 requires that the macros we test be defined before any standard |
| 400 | * header file is included. |
| 401 | * |
| 402 | * Here's a quick run-down of the versions: |
| 403 | * defined(_POSIX_SOURCE) 1003.1-1988 |
| 404 | * _POSIX_C_SOURCE == 1 1003.1-1990 |
| 405 | * _POSIX_C_SOURCE == 2 1003.2-1992 C Language Binding Option |
| 406 | * _POSIX_C_SOURCE == 199309 1003.1b-1993 |
| 407 | * _POSIX_C_SOURCE == 199506 1003.1c-1995, 1003.1i-1995, |
| 408 | * and the omnibus ISO/IEC 9945-1: 1996 |
| 409 | * _POSIX_C_SOURCE == 200112 1003.1-2001 |
| 410 | * _POSIX_C_SOURCE == 200809 1003.1-2008 |
| 411 | * |
| 412 | * In addition, the X/Open Portability Guide, which is now the Single UNIX |
| 413 | * Specification, defines a feature-test macro which indicates the version of |
| 414 | * that specification, and which subsumes _POSIX_C_SOURCE. |
| 415 | * |
| 416 | * Our macros begin with two underscores to avoid namespace screwage. |
| 417 | */ |
| 418 | |
| 419 | /* |
| 420 | * If no special macro was specified, make the DragonFly extensions |
| 421 | * available. Also make them available when requested so. |
| 422 | */ |
| 423 | #if (!defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) && \ |
| 424 | !defined(_ANSI_SOURCE) && !defined(_C99_SOURCE)) || \ |
| 425 | defined(_DRAGONFLY_SOURCE) || defined(_NETBSD_SOURCE) |
| 426 | #define __DF_VISIBLE 1 |
| 427 | #else |
| 428 | #define __DF_VISIBLE 0 |
| 429 | #endif |
| 430 | |
| 431 | /* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */ |
| 432 | #if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE - 0) == 1 |
| 433 | #undef _POSIX_C_SOURCE /* Probably illegal, but beyond caring now. */ |
| 434 | #define _POSIX_C_SOURCE 199009 |
| 435 | #endif |
| 436 | |
| 437 | /* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2. */ |
| 438 | #if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE - 0) == 2 |
| 439 | #undef _POSIX_C_SOURCE |
| 440 | #define _POSIX_C_SOURCE 199209 |
| 441 | #endif |
| 442 | |
| 443 | /* Deal with various X/Open Portability Guides and Single UNIX Spec. */ |
| 444 | #ifdef _XOPEN_SOURCE |
| 445 | #if _XOPEN_SOURCE - 0 >= 700 |
| 446 | #define __XSI_VISIBLE 700 |
| 447 | #undef _POSIX_C_SOURCE |
| 448 | #define _POSIX_C_SOURCE 200809 |
| 449 | #elif _XOPEN_SOURCE - 0 >= 600 |
| 450 | #define __XSI_VISIBLE 600 |
| 451 | #undef _POSIX_C_SOURCE |
| 452 | #define _POSIX_C_SOURCE 200112 |
| 453 | #elif _XOPEN_SOURCE - 0 >= 500 |
| 454 | #define __XSI_VISIBLE 500 |
| 455 | #undef _POSIX_C_SOURCE |
| 456 | #define _POSIX_C_SOURCE 199506 |
| 457 | #endif |
| 458 | #endif |
| 459 | |
| 460 | /* |
| 461 | * Deal with all versions of POSIX. The ordering relative to the tests above is |
| 462 | * important. |
| 463 | */ |
| 464 | #if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE) |
| 465 | #define _POSIX_C_SOURCE 198808 |
| 466 | #endif |
| 467 | #ifdef _POSIX_C_SOURCE |
| 468 | #if (_POSIX_C_SOURCE - 0) >= 200809 |
| 469 | #define __POSIX_VISIBLE 200809 |
| 470 | #define __ISO_C_VISIBLE 1999 |
| 471 | #elif (_POSIX_C_SOURCE - 0) >= 200112 |
| 472 | #define __POSIX_VISIBLE 200112 |
| 473 | #define __ISO_C_VISIBLE 1999 |
| 474 | #elif (_POSIX_C_SOURCE - 0) >= 199506 |
| 475 | #define __POSIX_VISIBLE 199506 |
| 476 | #define __ISO_C_VISIBLE 1990 |
| 477 | #elif (_POSIX_C_SOURCE - 0) >= 199309 |
| 478 | #define __POSIX_VISIBLE 199309 |
| 479 | #define __ISO_C_VISIBLE 1990 |
| 480 | #elif (_POSIX_C_SOURCE - 0) >= 199209 |
| 481 | #define __POSIX_VISIBLE 199209 |
| 482 | #define __ISO_C_VISIBLE 1990 |
| 483 | #elif (_POSIX_C_SOURCE - 0) >= 199009 |
| 484 | #define __POSIX_VISIBLE 199009 |
| 485 | #define __ISO_C_VISIBLE 1990 |
| 486 | #else |
| 487 | #define __POSIX_VISIBLE 198808 |
| 488 | #define __ISO_C_VISIBLE 0 |
| 489 | #endif /* _POSIX_C_SOURCE */ |
| 490 | #else |
| 491 | /*- |
| 492 | * Deal with _ANSI_SOURCE: |
| 493 | * If it is defined, and no other compilation environment is explicitly |
| 494 | * requested, then define our internal feature-test macros to zero. This |
| 495 | * makes no difference to the preprocessor (undefined symbols in preprocessing |
| 496 | * expressions are defined to have value zero), but makes it more convenient for |
| 497 | * a test program to print out the values. |
| 498 | * |
| 499 | * If a program mistakenly defines _ANSI_SOURCE and some other macro such as |
| 500 | * _POSIX_C_SOURCE, we will assume that it wants the broader compilation |
| 501 | * environment (and in fact we will never get here). |
| 502 | */ |
| 503 | #ifdef _ANSI_SOURCE /* Hide almost everything. */ |
| 504 | #define __POSIX_VISIBLE 0 |
| 505 | #define __XSI_VISIBLE 0 |
| 506 | #define __BSD_VISIBLE 0 |
| 507 | #define __ISO_C_VISIBLE 1990 |
| 508 | #elif defined(_C99_SOURCE) /* Localism to specify strict C99 env. */ |
| 509 | #define __POSIX_VISIBLE 0 |
| 510 | #define __XSI_VISIBLE 0 |
| 511 | #define __BSD_VISIBLE 0 |
| 512 | #define __ISO_C_VISIBLE 1999 |
| 513 | #else /* Default environment: show everything. */ |
| 514 | #define __POSIX_VISIBLE 200112 |
| 515 | #define __XSI_VISIBLE 600 |
| 516 | #define __BSD_VISIBLE 1 |
| 517 | #define __ISO_C_VISIBLE 1999 |
| 518 | #endif |
| 519 | #endif |
| 520 | |
| 521 | /* |
| 522 | * GLOBL macro exists to preserve __start_set_* and __stop_set_* sections |
| 523 | * of kernel modules which are discarded from binutils 2.17.50+ otherwise. |
| 524 | */ |
| 525 | |
| 526 | #define __GLOBL1(sym) __asm__(".globl " #sym) |
| 527 | #define __GLOBL(sym) __GLOBL1(sym) |
| 528 | |
| 529 | #endif /* !_SYS_CDEFS_H_ */ |