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. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)cdefs.h 8.8 (Berkeley) 1/9/95 33 * $FreeBSD: src/sys/sys/cdefs.h,v 1.28.2.8 2002/09/18 04:05:13 mikeh Exp $ 34 */ 35 36 #ifndef _SYS_CDEFS_H_ 37 #define _SYS_CDEFS_H_ 38 39 /* 40 * Testing against Clang-specific extensions. 41 */ 42 43 #ifndef __has_extension 44 #define __has_extension __has_feature 45 #endif 46 #ifndef __has_feature 47 #define __has_feature(x) 0 48 #endif 49 #ifndef __has_include 50 #define __has_include(x) 0 51 #endif 52 #ifndef __has_builtin 53 #define __has_builtin(x) 0 54 #endif 55 56 /* 57 * Macro to test if we are using a specific version of gcc or later. 58 */ 59 #if defined(__GNUC__) && !defined(__INTEL_COMPILER) 60 #define __GNUC_PREREQ__(ma, mi) \ 61 (__GNUC__ > (ma) || __GNUC__ == (ma) && __GNUC_MINOR__ >= (mi)) 62 #else 63 #define __GNUC_PREREQ__(ma, mi) 0 64 #endif 65 66 #if defined(__cplusplus) 67 #if __GNUC_PREREQ__(4, 0) 68 #define __BEGIN_DECLS _Pragma("GCC visibility push(default)") extern "C" { 69 #define __END_DECLS } _Pragma("GCC visibility pop") 70 #else 71 #define __BEGIN_DECLS extern "C" { 72 #define __END_DECLS } 73 #endif 74 #else 75 #define __BEGIN_DECLS 76 #define __END_DECLS 77 #endif 78 79 /* 80 * The __VM_CACHELINE_SIZE macro defines the common cache line alignment 81 * size that can be found across most recent and somewhat latest Intel 82 * hardware, i.e. L1 cache sizes etc. 83 * 84 * If needed, this value can be TUNED. Suitable values for this macro 85 * are 32, 64 and 128 bytes. The unit of measurement for this macro is 86 * bytes. 87 * 88 * XXX: This macro and related macros will eventually move to a MD 89 * header, but currently, we do need such a hierarchy. 90 */ 91 #define __VM_CACHELINE_SIZE 64 92 #define __VM_CACHELINE_MASK (__VM_CACHELINE_SIZE - 1) 93 #define __VM_CACHELINE_ALIGN(n) \ 94 (((n) + __VM_CACHELINE_MASK) & ~__VM_CACHELINE_MASK) 95 96 /* 97 * The __CONCAT macro is used to concatenate parts of symbol names, e.g. 98 * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo. 99 * The __CONCAT macro is a bit tricky to use if it must work in non-ANSI 100 * mode -- there must be no spaces between its arguments, and for nested 101 * __CONCAT's, all the __CONCAT's must be at the left. __CONCAT can also 102 * concatenate double-quoted strings produced by the __STRING macro, but 103 * this only works with ANSI C. 104 * 105 * __XSTRING is like __STRING, but it expands any macros in its argument 106 * first. It is only available with ANSI C. 107 */ 108 #if defined(__STDC__) || defined(__cplusplus) 109 #define __P(protos) protos /* full-blown ANSI C */ 110 #define __CONCAT1(x,y) x ## y 111 #define __CONCAT(x,y) __CONCAT1(x,y) 112 #define __STRING(x) #x /* stringify without expanding x */ 113 #define __XSTRING(x) __STRING(x) /* expand x, then stringify */ 114 115 #define __const const /* define reserved names to standard */ 116 #define __signed signed 117 #define __volatile volatile 118 #if defined(__cplusplus) 119 #define __inline inline /* convert to C++ keyword */ 120 #else 121 #ifndef __GNUC__ 122 #define __inline /* delete GCC keyword */ 123 #endif /* !__GNUC__ */ 124 #endif /* !__cplusplus */ 125 126 #else /* !(__STDC__ || __cplusplus) */ 127 #define __P(protos) () /* traditional C preprocessor */ 128 #define __CONCAT(x,y) x/**/y 129 #define __STRING(x) "x" 130 131 #ifndef __GNUC__ 132 #define __const /* delete pseudo-ANSI C keywords */ 133 #define __inline 134 #define __signed 135 #define __volatile 136 /* 137 * In non-ANSI C environments, new programs will want ANSI-only C keywords 138 * deleted from the program and old programs will want them left alone. 139 * When using a compiler other than gcc, programs using the ANSI C keywords 140 * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS. 141 * When using "gcc -traditional", we assume that this is the intent; if 142 * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone. 143 */ 144 #ifndef NO_ANSI_KEYWORDS 145 #define const /* delete ANSI C keywords */ 146 #define inline 147 #define signed 148 #define volatile 149 #endif /* !NO_ANSI_KEYWORDS */ 150 #endif /* !__GNUC__ */ 151 #endif /* !(__STDC__ || __cplusplus) */ 152 153 /* 154 * Compiler-dependent macros to help declare dead (non-returning) and 155 * pure (no side effects) functions, and unused variables. They are 156 * null except for versions of gcc that are known to support the features 157 * properly (old versions of gcc-2 supported the dead and pure features 158 * in a different (wrong) way). 159 */ 160 #ifdef lint 161 162 #define __dead2 163 #define __pure 164 #define __pure2 165 #define __unused 166 #define __packed 167 #define __aligned(x) 168 #define __section(x) 169 #define __always_inline 170 #define __nonnull(x) 171 #define __heedresult 172 #define __returns_twice 173 174 #else 175 176 #if __GNUC_PREREQ__(2, 7) 177 #define __dead2 __attribute__((__noreturn__)) 178 #define __pure2 __attribute__((__const__)) 179 #define __unused __attribute__((__unused__)) 180 #define __packed __attribute__((__packed__)) 181 #define __aligned(x) __attribute__((__aligned__(x))) 182 #define __section(x) __attribute__((__section__(x))) 183 #else 184 #define __dead2 185 #define __pure2 186 #define __unused 187 #endif 188 189 #if __GNUC_PREREQ__(2, 96) 190 #define __pure __attribute__((__pure__)) 191 #else 192 #define __pure __pure2 193 #endif 194 195 #if __GNUC_PREREQ__(3, 1) 196 #define __always_inline __attribute__((__always_inline__)) 197 #define __noinline __attribute__((__noinline__)) 198 #else 199 #define __always_inline 200 #define __noinline 201 #endif 202 203 #if __GNUC_PREREQ__(3, 3) 204 #define __heedresult __attribute__((__warn_unused_result__)) 205 #define __nonnull(x) __attribute__((__nonnull__(x))) 206 #define __used __attribute__((__used__)) 207 #else 208 #define __heedresult 209 #define __nonnull(x) 210 #define __used __unused 211 #endif 212 213 #if __GNUC_PREREQ__(4, 1) 214 #define __returns_twice __attribute__((__returns_twice__)) 215 #else 216 #define __returns_twice 217 #endif 218 219 #endif /* LINT */ 220 221 #if !__GNUC_PREREQ__(2, 7) && __STDC_VERSION < 199901 222 #define __func__ NULL 223 #endif 224 225 #if (__GNUC_PREREQ__(2, 0) && !defined(__STRICT_ANSI__)) || \ 226 __STDC_VERSION__ >= 199901 227 #define __LONG_LONG_SUPPORTED 228 #endif 229 230 /* C++11 exposes a load of C99 stuff */ 231 #if defined(__cplusplus) && __cplusplus >= 201103L 232 #define __LONG_LONG_SUPPORTED 233 #ifndef __STDC_LIMIT_MACROS 234 #define __STDC_LIMIT_MACROS 235 #endif 236 #ifndef __STDC_CONSTANT_MACROS 237 #define __STDC_CONSTANT_MACROS 238 #endif 239 #endif 240 241 /* 242 * GNU C version 2.96 adds explicit branch prediction so that 243 * the CPU back-end can hint the processor and also so that 244 * code blocks can be reordered such that the predicted path 245 * sees a more linear flow, thus improving cache behavior, etc. 246 * 247 * The following two macros provide us with a way to utilize this 248 * compiler feature. Use __predict_true() if you expect the expression 249 * to evaluate to true, and __predict_false() if you expect the 250 * expression to evaluate to false. 251 * 252 * A few notes about usage: 253 * 254 * * Generally, __predict_false() error condition checks (unless 255 * you have some _strong_ reason to do otherwise, in which case 256 * document it), and/or __predict_true() `no-error' condition 257 * checks, assuming you want to optimize for the no-error case. 258 * 259 * * Other than that, if you don't know the likelihood of a test 260 * succeeding from empirical or other `hard' evidence, don't 261 * make predictions. 262 * 263 * * These are meant to be used in places that are run `a lot'. 264 * It is wasteful to make predictions in code that is run 265 * seldomly (e.g. at subsystem initialization time) as the 266 * basic block reordering that this affects can often generate 267 * larger code. 268 */ 269 #if __GNUC_PREREQ__(2, 96) 270 #define __predict_true(exp) __builtin_expect((exp), 1) 271 #define __predict_false(exp) __builtin_expect((exp), 0) 272 #else 273 #define __predict_true(exp) (exp) 274 #define __predict_false(exp) (exp) 275 #endif 276 277 /* 278 * GCC 2.95 and later provides `__restrict' as an extention to C90 to support 279 * the C99-specific `restrict' type qualifier. We happen to use `__restrict' 280 * as a way to define the `restrict' type qualifier without disturbing older 281 * software that is unaware of C99 keywords. 282 */ 283 #if !__GNUC_PREREQ__(2, 95) 284 #if __STDC_VERSION__ < 199901 285 #define __restrict 286 #else 287 #define __restrict restrict 288 #endif 289 #endif 290 291 /* 292 * Compiler-dependent macros to declare that functions take printf-like 293 * or scanf-like arguments. They are null except for versions of gcc 294 * that are known to support the features properly (old versions of gcc-2 295 * didn't permit keeping the keywords out of the application namespace). 296 * 297 * The printf0like macro for GCC 2 uses DragonFly specific compiler extensions. 298 */ 299 #if !__GNUC_PREREQ__(2, 7) 300 #define __printflike(fmtarg, firstvararg) 301 #define __scanflike(fmtarg, firstvararg) 302 #define __printf0like(fmtarg, firstvararg) 303 #define __format_arg(fmtarg) 304 #define __strfmonlike(fmtarg, firstvararg) 305 #define __strftimelike(fmtarg, firstvararg) 306 307 #elif __GNUC_PREREQ__(3, 0) 308 #define __printflike(fmtarg, firstvararg) \ 309 __attribute__((__nonnull__(fmtarg), \ 310 __format__ (__printf__, fmtarg, firstvararg))) 311 #define __printf0like(fmtarg, firstvararg) \ 312 __attribute__((__format__ (__printf__, fmtarg, firstvararg))) 313 #define __scanflike(fmtarg, firstvararg) \ 314 __attribute__((__format__ (__scanf__, fmtarg, firstvararg))) 315 #define __format_arg(fmtarg) \ 316 __attribute__((__format_arg__ (fmtarg))) 317 #define __strfmonlike(fmtarg, firstvararg) \ 318 __attribute__((__format__ (__strfmon__, fmtarg, firstvararg))) 319 #define __strftimelike(fmtarg, firstvararg) \ 320 __attribute__((__format__ (__strftime__, fmtarg, firstvararg))) 321 322 #else 323 #define __printflike(fmtarg, firstvararg) \ 324 __attribute__((__format__ (__printf__, fmtarg, firstvararg))) 325 #define __printf0like(fmtarg, firstvararg) \ 326 __attribute__((__format__ (__printf0__, fmtarg, firstvararg))) 327 #define __scanflike(fmtarg, firstvararg) \ 328 __attribute__((__format__ (__scanf__, fmtarg, firstvararg))) 329 #define __format_arg(fmtarg) \ 330 __attribute__((__format_arg__ (fmtarg))) 331 #define __strfmonlike(fmtarg, firstvararg) \ 332 __attribute__((__format__ (__strfmon__, fmtarg, firstvararg))) 333 #define __strftimelike(fmtarg, firstvararg) \ 334 __attribute__((__format__ (__strftime__, fmtarg, firstvararg))) 335 336 #endif 337 338 #if !__GNUC_PREREQ__(3, 0) 339 #define __ARRAY_ZERO 0 340 #else 341 #define __ARRAY_ZERO 342 #endif 343 344 #if __GNUC_PREREQ__(4, 0) 345 #define __dso_public __attribute__((__visibility__("default"))) 346 #define __dso_hidden __attribute__((__visibility__("hidden"))) 347 #else 348 #define __dso_public 349 #define __dso_hidden 350 #endif 351 352 /* 353 * A convenient constructor macro, GCC 4.3.0 added priority support to 354 * constructors, provide a compatible interface for both. 355 */ 356 #if __GNUC_PREREQ__(4, 3) 357 #define __constructor(prio) __attribute__((constructor(prio))) 358 #else 359 #define __constructor(prio) __attribute__((constructor)) 360 #endif 361 362 /* 363 * Handy GCC based macros: 364 * 365 * __cachealign: 366 * 367 * The __cachealign macro can be used for cache line aligning structures 368 * of small to medium size. It aligns the particular structure or 369 * storage type to a system default cache line alignment, thus giving us 370 * a much more better cache utilization by making the hardware work at 371 * its best burst speeds. 372 * 373 * __usereg: 374 * 375 * The __usereg macro can/should be used when a function contains 376 * arguments not more than 3. It can be very useful to us due to the 377 * message-passing nature of the kernel. 378 * 379 * !!NOTE - USAGE INFORMATION!! 380 * 381 * The __cachealign macro should not be used for data structures that are 382 * as big struct proc, struct vnode, struct thread, and other structs which 383 * are as big as them; simply because it will be useless in that case. 384 * 385 * The __usereg macro should be used whenever possible, i.e., when a function 386 * does not exceed more than 3 arguments, and should not be used for vararg 387 * type functions. 388 * 389 * In other words, AVOID MISUSE OF THESE MACROS. :-) 390 */ 391 #ifdef __GNUC__ 392 #define __cachealign __attribute__((__aligned__(__VM_CACHELINE_SIZE))) 393 #define __usereg __attribute__((__regparm__(3))) 394 #else 395 #define __cachealign 396 #define __usereg 397 #endif 398 399 #ifdef __GNUC__ 400 #define __strong_reference(sym,aliassym) \ 401 extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym))); 402 #define __weak_reference(sym,alias) \ 403 __asm__(".weak " #alias); \ 404 __asm__(".equ " #alias ", " #sym) 405 #define __warn_references(sym,msg) \ 406 __asm__(".section .gnu.warning." #sym); \ 407 __asm__(".asciz \"" msg "\""); \ 408 __asm__(".previous") 409 #endif /* __GNUC__ */ 410 411 #if defined(__GNUC__) 412 #define __IDSTRING(name,string) __asm__(".ident\t\"" string "\"") 413 #endif 414 415 #ifndef __RCSID 416 #define __RCSID(s) __IDSTRING(rcsid,s) 417 #endif 418 419 #ifndef __RCSID_SOURCE 420 #define __RCSID_SOURCE(s) __IDSTRING(rcsid_source,s) 421 #endif 422 423 #ifndef __COPYRIGHT 424 #define __COPYRIGHT(s) __IDSTRING(copyright,s) 425 #endif 426 427 #ifndef __DECONST 428 #define __DECONST(type, var) ((type)(uintptr_t)(const void *)(var)) 429 #endif 430 431 #ifndef __DEVOLATILE 432 #define __DEVOLATILE(type, var) ((type)(uintptr_t)(volatile void *)(var)) 433 #endif 434 435 #ifndef __DEQUALIFY 436 #define __DEQUALIFY(type, var) ((type)(uintptr_t)(const volatile void *)(var)) 437 #endif 438 439 /* 440 * Keywords added in C11. 441 */ 442 443 #if !__GNUC_PREREQ__(2, 95) 444 #define __alignof(x) __offsetof(struct { char __a; x __b; }, __b) 445 #endif 446 447 /* 448 * Keywords added in C11. 449 */ 450 451 #if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 201112L 452 453 #if !__has_extension(c_alignas) 454 #if (defined(__cplusplus) && __cplusplus >= 201103L) || \ 455 __has_extension(cxx_alignas) 456 #define _Alignas(x) alignas(x) 457 #else 458 /* XXX: Only emulates _Alignas(constant-expression); not _Alignas(type-name). */ 459 #define _Alignas(x) __aligned(x) 460 #endif 461 #endif 462 463 #if defined(__cplusplus) && __cplusplus >= 201103L 464 #define _Alignof(x) alignof(x) 465 #else 466 #define _Alignof(x) __alignof(x) 467 #endif 468 469 #define _Noreturn __dead2 470 471 #if !__has_extension(c_static_assert) 472 #if (defined(__cplusplus) && __cplusplus >= 201103L) || \ 473 __has_extension(cxx_static_assert) 474 #define _Static_assert(x, y) static_assert(x, y) 475 #elif !__GNUC_PREREQ__(4, 6) 476 #define _Static_assert(x, y) struct __hack 477 #ifdef _KERNEL 478 #define CTASSERT(x) _CTASSERT(x, __LINE__) 479 #define _CTASSERT(x, y) __CTASSERT(x, y) 480 #define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1] 481 #endif 482 #endif 483 #endif 484 485 #endif /* __STDC_VERSION__ || __STDC_VERSION__ < 201112L */ 486 487 #if defined(_KERNEL) && !defined(CTASSERT) 488 #define CTASSERT(x) _Static_assert(x, \ 489 "compile-time assertion failed") 490 #endif 491 492 /* 493 * Emulation of C11 _Generic(). Unlike the previously defined C11 494 * keywords, it is not possible to implement this using exactly the same 495 * syntax. Therefore implement something similar under the name 496 * __generic(). Unlike _Generic(), this macro can only distinguish 497 * between a single type, so it requires nested invocations to 498 * distinguish multiple cases. 499 */ 500 501 #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L 502 #define __generic(expr, t, yes, no) \ 503 _Generic(expr, t: yes, default: no) 504 #elif __GNUC_PREREQ__(3, 1) && !defined(__cplusplus) 505 #define __generic(expr, t, yes, no) \ 506 __builtin_choose_expr( \ 507 __builtin_types_compatible_p(__typeof(expr), t), yes, no) 508 #endif 509 510 /*- 511 * POSIX.1 requires that the macros we test be defined before any standard 512 * header file is included. 513 * 514 * Here's a quick run-down of the versions: 515 * defined(_POSIX_SOURCE) 1003.1-1988 516 * _POSIX_C_SOURCE == 1 1003.1-1990 517 * _POSIX_C_SOURCE == 2 1003.2-1992 C Language Binding Option 518 * _POSIX_C_SOURCE == 199309 1003.1b-1993 519 * _POSIX_C_SOURCE == 199506 1003.1c-1995, 1003.1i-1995, 520 * and the omnibus ISO/IEC 9945-1: 1996 521 * _POSIX_C_SOURCE == 200112 1003.1-2001 522 * _POSIX_C_SOURCE == 200809 1003.1-2008 523 * 524 * In addition, the X/Open Portability Guide, which is now the Single UNIX 525 * Specification, defines a feature-test macro which indicates the version of 526 * that specification, and which subsumes _POSIX_C_SOURCE. 527 * 528 * Our macros begin with two underscores to avoid namespace screwage. 529 */ 530 531 /* 532 * If no special macro was specified, make the DragonFly extensions 533 * available. Also make them available when requested so. 534 */ 535 #if (!defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) && \ 536 !defined(_ANSI_SOURCE) && !defined(_C99_SOURCE)) || \ 537 defined(_DRAGONFLY_SOURCE) || defined(_NETBSD_SOURCE) 538 #define __DF_VISIBLE 1 539 #else 540 #define __DF_VISIBLE 0 541 #endif 542 543 /* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */ 544 #if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE - 0) == 1 545 #undef _POSIX_C_SOURCE /* Probably illegal, but beyond caring now. */ 546 #define _POSIX_C_SOURCE 199009 547 #endif 548 549 /* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2. */ 550 #if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE - 0) == 2 551 #undef _POSIX_C_SOURCE 552 #define _POSIX_C_SOURCE 199209 553 #endif 554 555 /* Deal with various X/Open Portability Guides and Single UNIX Spec. */ 556 #ifdef _XOPEN_SOURCE 557 #if _XOPEN_SOURCE - 0 >= 700 558 #define __XSI_VISIBLE 700 559 #undef _POSIX_C_SOURCE 560 #define _POSIX_C_SOURCE 200809 561 #elif _XOPEN_SOURCE - 0 >= 600 562 #define __XSI_VISIBLE 600 563 #undef _POSIX_C_SOURCE 564 #define _POSIX_C_SOURCE 200112 565 #elif _XOPEN_SOURCE - 0 >= 500 566 #define __XSI_VISIBLE 500 567 #undef _POSIX_C_SOURCE 568 #define _POSIX_C_SOURCE 199506 569 #endif 570 #endif 571 572 /* 573 * Deal with all versions of POSIX. The ordering relative to the tests above is 574 * important. 575 */ 576 #if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE) 577 #define _POSIX_C_SOURCE 198808 578 #endif 579 #ifdef _POSIX_C_SOURCE 580 #if (_POSIX_C_SOURCE - 0) >= 200809 581 #define __POSIX_VISIBLE 200809 582 #define __ISO_C_VISIBLE 1999 583 #elif (_POSIX_C_SOURCE - 0) >= 200112 584 #define __POSIX_VISIBLE 200112 585 #define __ISO_C_VISIBLE 1999 586 #elif (_POSIX_C_SOURCE - 0) >= 199506 587 #define __POSIX_VISIBLE 199506 588 #define __ISO_C_VISIBLE 1990 589 #elif (_POSIX_C_SOURCE - 0) >= 199309 590 #define __POSIX_VISIBLE 199309 591 #define __ISO_C_VISIBLE 1990 592 #elif (_POSIX_C_SOURCE - 0) >= 199209 593 #define __POSIX_VISIBLE 199209 594 #define __ISO_C_VISIBLE 1990 595 #elif (_POSIX_C_SOURCE - 0) >= 199009 596 #define __POSIX_VISIBLE 199009 597 #define __ISO_C_VISIBLE 1990 598 #else 599 #define __POSIX_VISIBLE 198808 600 #define __ISO_C_VISIBLE 0 601 #endif /* _POSIX_C_SOURCE */ 602 #else 603 /*- 604 * Deal with _ANSI_SOURCE: 605 * If it is defined, and no other compilation environment is explicitly 606 * requested, then define our internal feature-test macros to zero. This 607 * makes no difference to the preprocessor (undefined symbols in preprocessing 608 * expressions are defined to have value zero), but makes it more convenient for 609 * a test program to print out the values. 610 * 611 * If a program mistakenly defines _ANSI_SOURCE and some other macro such as 612 * _POSIX_C_SOURCE, we will assume that it wants the broader compilation 613 * environment (and in fact we will never get here). 614 */ 615 #ifdef _ANSI_SOURCE /* Hide almost everything. */ 616 #define __POSIX_VISIBLE 0 617 #define __XSI_VISIBLE 0 618 #define __BSD_VISIBLE 0 619 #define __ISO_C_VISIBLE 1990 620 #elif defined(_C99_SOURCE) /* Localism to specify strict C99 env. */ 621 #define __POSIX_VISIBLE 0 622 #define __XSI_VISIBLE 0 623 #define __BSD_VISIBLE 0 624 #define __ISO_C_VISIBLE 1999 625 #elif defined(_C11_SOURCE) /* Localism to specify strict C11 env. */ 626 #define __POSIX_VISIBLE 0 627 #define __XSI_VISIBLE 0 628 #define __BSD_VISIBLE 0 629 #define __ISO_C_VISIBLE 2011 630 #else /* Default environment: show everything. */ 631 #define __POSIX_VISIBLE 200809 632 #define __XSI_VISIBLE 700 633 #define __BSD_VISIBLE 1 634 #define __ISO_C_VISIBLE 2011 635 #endif 636 #endif 637 638 /* 639 * GLOBL macro exists to preserve __start_set_* and __stop_set_* sections 640 * of kernel modules which are discarded from binutils 2.17.50+ otherwise. 641 */ 642 643 #define __GLOBL1(sym) __asm__(".globl " #sym) 644 #define __GLOBL(sym) __GLOBL1(sym) 645 646 /* 647 * Ignore the rcs id of a source file. 648 */ 649 650 #ifndef __FBSDID 651 #define __FBSDID(s) struct __hack 652 #endif 653 654 #ifndef __RCSID 655 #define __RCSID(s) struct __hack 656 #endif 657 658 #ifndef __RCSID_SOURCE 659 #define __RCSID_SOURCE(s) struct __hack 660 #endif 661 662 #ifndef __SCCSID 663 #define __SCCSID(s) struct __hack 664 #endif 665 666 #ifndef __COPYRIGHT 667 #define __COPYRIGHT(s) struct __hack 668 #endif 669 670 #endif /* !_SYS_CDEFS_H_ */ 671