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 * Testing against Clang-specific extensions. 45 */ 46 47 #ifndef __has_extension 48 #define __has_extension __has_feature 49 #endif 50 #ifndef __has_feature 51 #define __has_feature(x) 0 52 #endif 53 #ifndef __has_include 54 #define __has_include(x) 0 55 #endif 56 #ifndef __has_builtin 57 #define __has_builtin(x) 0 58 #endif 59 60 /* 61 * Macro to test if we are using a specific version of gcc or later. 62 */ 63 #if defined(__GNUC__) && !defined(__INTEL_COMPILER) 64 #define __GNUC_PREREQ__(ma, mi) \ 65 (__GNUC__ > (ma) || __GNUC__ == (ma) && __GNUC_MINOR__ >= (mi)) 66 #else 67 #define __GNUC_PREREQ__(ma, mi) 0 68 #endif 69 70 #if defined(__cplusplus) 71 #if __GNUC_PREREQ__(4, 0) 72 #define __BEGIN_DECLS _Pragma("GCC visibility push(default)") extern "C" { 73 #define __END_DECLS } _Pragma("GCC visibility pop") 74 #else 75 #define __BEGIN_DECLS extern "C" { 76 #define __END_DECLS } 77 #endif 78 #else 79 #define __BEGIN_DECLS 80 #define __END_DECLS 81 #endif 82 83 /* 84 * The __VM_CACHELINE_SIZE macro defines the common cache line alignment 85 * size that can be found across most recent and somewhat latest Intel 86 * hardware, i.e. L1 cache sizes etc. 87 * 88 * If needed, this value can be TUNED. Suitable values for this macro 89 * are 32, 64 and 128 bytes. The unit of measurement for this macro is 90 * bytes. 91 * 92 * XXX: This macro and related macros will eventually move to a MD 93 * header, but currently, we do need such a hierarchy. 94 */ 95 #define __VM_CACHELINE_SIZE 64 96 #define __VM_CACHELINE_MASK (__VM_CACHELINE_SIZE - 1) 97 #define __VM_CACHELINE_ALIGN(n) \ 98 (((n) + __VM_CACHELINE_MASK) & ~__VM_CACHELINE_MASK) 99 100 /* 101 * The __CONCAT macro is used to concatenate parts of symbol names, e.g. 102 * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo. 103 * The __CONCAT macro is a bit tricky to use if it must work in non-ANSI 104 * mode -- there must be no spaces between its arguments, and for nested 105 * __CONCAT's, all the __CONCAT's must be at the left. __CONCAT can also 106 * concatenate double-quoted strings produced by the __STRING macro, but 107 * this only works with ANSI C. 108 * 109 * __XSTRING is like __STRING, but it expands any macros in its argument 110 * first. It is only available with ANSI C. 111 */ 112 #if defined(__STDC__) || defined(__cplusplus) 113 #define __P(protos) protos /* full-blown ANSI C */ 114 #define __CONCAT1(x,y) x ## y 115 #define __CONCAT(x,y) __CONCAT1(x,y) 116 #define __STRING(x) #x /* stringify without expanding x */ 117 #define __XSTRING(x) __STRING(x) /* expand x, then stringify */ 118 119 #define __const const /* define reserved names to standard */ 120 #define __signed signed 121 #define __volatile volatile 122 #if defined(__cplusplus) 123 #define __inline inline /* convert to C++ keyword */ 124 #else 125 #ifndef __GNUC__ 126 #define __inline /* delete GCC keyword */ 127 #endif /* !__GNUC__ */ 128 #endif /* !__cplusplus */ 129 130 #else /* !(__STDC__ || __cplusplus) */ 131 #define __P(protos) () /* traditional C preprocessor */ 132 #define __CONCAT(x,y) x/**/y 133 #define __STRING(x) "x" 134 135 #ifndef __GNUC__ 136 #define __const /* delete pseudo-ANSI C keywords */ 137 #define __inline 138 #define __signed 139 #define __volatile 140 /* 141 * In non-ANSI C environments, new programs will want ANSI-only C keywords 142 * deleted from the program and old programs will want them left alone. 143 * When using a compiler other than gcc, programs using the ANSI C keywords 144 * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS. 145 * When using "gcc -traditional", we assume that this is the intent; if 146 * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone. 147 */ 148 #ifndef NO_ANSI_KEYWORDS 149 #define const /* delete ANSI C keywords */ 150 #define inline 151 #define signed 152 #define volatile 153 #endif /* !NO_ANSI_KEYWORDS */ 154 #endif /* !__GNUC__ */ 155 #endif /* !(__STDC__ || __cplusplus) */ 156 157 /* 158 * Compiler-dependent macros to help declare dead (non-returning) and 159 * pure (no side effects) functions, and unused variables. They are 160 * null except for versions of gcc that are known to support the features 161 * properly (old versions of gcc-2 supported the dead and pure features 162 * in a different (wrong) way). 163 */ 164 #ifdef lint 165 166 #define __dead2 167 #define __pure 168 #define __pure2 169 #define __unused 170 #define __packed 171 #define __aligned(x) 172 #define __section(x) 173 #define __always_inline 174 #define __nonnull(x) 175 #define __heedresult 176 #define __returns_twice 177 178 #else 179 180 #if __GNUC_PREREQ__(2, 7) 181 #define __dead2 __attribute__((__noreturn__)) 182 #define __pure2 __attribute__((__const__)) 183 #define __unused __attribute__((__unused__)) 184 #define __packed __attribute__((__packed__)) 185 #define __aligned(x) __attribute__((__aligned__(x))) 186 #define __section(x) __attribute__((__section__(x))) 187 #else 188 #define __dead2 189 #define __pure2 190 #define __unused 191 #endif 192 193 #if __GNUC_PREREQ__(2, 96) 194 #define __pure __attribute__((__pure__)) 195 #else 196 #define __pure __pure2 197 #endif 198 199 #if __GNUC_PREREQ__(3, 1) 200 #define __always_inline __attribute__((__always_inline__)) 201 #define __noinline __attribute__((__noinline__)) 202 #else 203 #define __always_inline 204 #define __noinline 205 #endif 206 207 #if __GNUC_PREREQ__(3, 3) 208 #define __heedresult __attribute__((__warn_unused_result__)) 209 #define __nonnull(x) __attribute__((__nonnull__(x))) 210 #define __used __attribute__((__used__)) 211 #else 212 #define __heedresult 213 #define __nonnull(x) 214 #define __used __unused 215 #endif 216 217 #if __GNUC_PREREQ__(4, 1) 218 #define __returns_twice __attribute__((__returns_twice__)) 219 #else 220 #define __returns_twice 221 #endif 222 223 #endif /* LINT */ 224 225 #if !__GNUC_PREREQ__(2, 7) && __STDC_VERSION < 199901 226 #define __func__ NULL 227 #endif 228 229 #if (__GNUC_PREREQ__(2, 0) && !defined(__STRICT_ANSI__)) || \ 230 __STDC_VERSION__ >= 199901 231 #define __LONG_LONG_SUPPORTED 232 #endif 233 234 /* C++11 exposes a load of C99 stuff */ 235 #if defined(__cplusplus) && __cplusplus >= 201103L 236 #define __LONG_LONG_SUPPORTED 237 #ifndef __STDC_LIMIT_MACROS 238 #define __STDC_LIMIT_MACROS 239 #endif 240 #ifndef __STDC_CONSTANT_MACROS 241 #define __STDC_CONSTANT_MACROS 242 #endif 243 #endif 244 245 /* 246 * GNU C version 2.96 adds explicit branch prediction so that 247 * the CPU back-end can hint the processor and also so that 248 * code blocks can be reordered such that the predicted path 249 * sees a more linear flow, thus improving cache behavior, etc. 250 * 251 * The following two macros provide us with a way to utilize this 252 * compiler feature. Use __predict_true() if you expect the expression 253 * to evaluate to true, and __predict_false() if you expect the 254 * expression to evaluate to false. 255 * 256 * A few notes about usage: 257 * 258 * * Generally, __predict_false() error condition checks (unless 259 * you have some _strong_ reason to do otherwise, in which case 260 * document it), and/or __predict_true() `no-error' condition 261 * checks, assuming you want to optimize for the no-error case. 262 * 263 * * Other than that, if you don't know the likelihood of a test 264 * succeeding from empirical or other `hard' evidence, don't 265 * make predictions. 266 * 267 * * These are meant to be used in places that are run `a lot'. 268 * It is wasteful to make predictions in code that is run 269 * seldomly (e.g. at subsystem initialization time) as the 270 * basic block reordering that this affects can often generate 271 * larger code. 272 */ 273 #if __GNUC_PREREQ__(2, 96) 274 #define __predict_true(exp) __builtin_expect((exp), 1) 275 #define __predict_false(exp) __builtin_expect((exp), 0) 276 #else 277 #define __predict_true(exp) (exp) 278 #define __predict_false(exp) (exp) 279 #endif 280 281 /* 282 * GCC 2.95 and later provides `__restrict' as an extention to C90 to support 283 * the C99-specific `restrict' type qualifier. We happen to use `__restrict' 284 * as a way to define the `restrict' type qualifier without disturbing older 285 * software that is unaware of C99 keywords. 286 */ 287 #if !__GNUC_PREREQ__(2, 95) 288 #if __STDC_VERSION__ < 199901 289 #define __restrict 290 #else 291 #define __restrict restrict 292 #endif 293 #endif 294 295 /* 296 * Compiler-dependent macros to declare that functions take printf-like 297 * or scanf-like arguments. They are null except for versions of gcc 298 * that are known to support the features properly (old versions of gcc-2 299 * didn't permit keeping the keywords out of the application namespace). 300 * 301 * The printf0like macro for GCC 2 uses DragonFly specific compiler extensions. 302 */ 303 #if !__GNUC_PREREQ__(2, 7) 304 #define __printflike(fmtarg, firstvararg) 305 #define __scanflike(fmtarg, firstvararg) 306 #define __printf0like(fmtarg, firstvararg) 307 #define __format_arg(fmtarg) 308 #define __strfmonlike(fmtarg, firstvararg) 309 #define __strftimelike(fmtarg, firstvararg) 310 311 #elif __GNUC_PREREQ__(3, 0) 312 #define __printflike(fmtarg, firstvararg) \ 313 __attribute__((__nonnull__(fmtarg), \ 314 __format__ (__printf__, fmtarg, firstvararg))) 315 #define __printf0like(fmtarg, firstvararg) \ 316 __attribute__((__format__ (__printf__, fmtarg, firstvararg))) 317 #define __scanflike(fmtarg, firstvararg) \ 318 __attribute__((__format__ (__scanf__, fmtarg, firstvararg))) 319 #define __format_arg(fmtarg) \ 320 __attribute__((__format_arg__ (fmtarg))) 321 #define __strfmonlike(fmtarg, firstvararg) \ 322 __attribute__((__format__ (__strfmon__, fmtarg, firstvararg))) 323 #define __strftimelike(fmtarg, firstvararg) \ 324 __attribute__((__format__ (__strftime__, fmtarg, firstvararg))) 325 326 #else 327 #define __printflike(fmtarg, firstvararg) \ 328 __attribute__((__format__ (__printf__, fmtarg, firstvararg))) 329 #define __printf0like(fmtarg, firstvararg) \ 330 __attribute__((__format__ (__printf0__, fmtarg, firstvararg))) 331 #define __scanflike(fmtarg, firstvararg) \ 332 __attribute__((__format__ (__scanf__, fmtarg, firstvararg))) 333 #define __format_arg(fmtarg) \ 334 __attribute__((__format_arg__ (fmtarg))) 335 #define __strfmonlike(fmtarg, firstvararg) \ 336 __attribute__((__format__ (__strfmon__, fmtarg, firstvararg))) 337 #define __strftimelike(fmtarg, firstvararg) \ 338 __attribute__((__format__ (__strftime__, fmtarg, firstvararg))) 339 340 #endif 341 342 #if !__GNUC_PREREQ__(3, 0) 343 #define __ARRAY_ZERO 0 344 #else 345 #define __ARRAY_ZERO 346 #endif 347 348 #if __GNUC_PREREQ__(4, 0) 349 #define __dso_public __attribute__((__visibility__("default"))) 350 #define __dso_hidden __attribute__((__visibility__("hidden"))) 351 #else 352 #define __dso_public 353 #define __dso_hidden 354 #endif 355 356 /* 357 * A convenient constructor macro, GCC 4.3.0 added priority support to 358 * constructors, provide a compatible interface for both. 359 */ 360 #if __GNUC_PREREQ__(4, 3) 361 #define __constructor(prio) __attribute__((constructor(prio))) 362 #else 363 #define __constructor(prio) __attribute__((constructor)) 364 #endif 365 366 /* 367 * Handy GCC based macros: 368 * 369 * __cachealign: 370 * 371 * The __cachealign macro can be used for cache line aligning structures 372 * of small to medium size. It aligns the particular structure or 373 * storage type to a system default cache line alignment, thus giving us 374 * a much more better cache utilization by making the hardware work at 375 * its best burst speeds. 376 * 377 * __usereg: 378 * 379 * The __usereg macro can/should be used when a function contains 380 * arguments not more than 3. It can be very useful to us due to the 381 * message-passing nature of the kernel. 382 * 383 * !!NOTE - USAGE INFORMATION!! 384 * 385 * The __cachealign macro should not be used for data structures that are 386 * as big struct proc, struct vnode, struct thread, and other structs which 387 * are as big as them; simply because it will be useless in that case. 388 * 389 * The __usereg macro should be used whenever possible, i.e., when a function 390 * does not exceed more than 3 arguments, and should not be used for vararg 391 * type functions. 392 * 393 * In other words, AVOID MISUSE OF THESE MACROS. :-) 394 */ 395 #ifdef __GNUC__ 396 #define __cachealign __attribute__((__aligned__(__VM_CACHELINE_SIZE))) 397 #define __usereg __attribute__((__regparm__(3))) 398 #else 399 #define __cachealign 400 #define __usereg 401 #endif 402 403 #ifdef __GNUC__ 404 #define __strong_reference(sym,aliassym) \ 405 extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym))); 406 #define __weak_reference(sym,alias) \ 407 __asm__(".weak " #alias); \ 408 __asm__(".equ " #alias ", " #sym) 409 #define __warn_references(sym,msg) \ 410 __asm__(".section .gnu.warning." #sym); \ 411 __asm__(".asciz \"" msg "\""); \ 412 __asm__(".previous") 413 #endif /* __GNUC__ */ 414 415 #if defined(__GNUC__) 416 #define __IDSTRING(name,string) __asm__(".ident\t\"" string "\"") 417 #endif 418 419 #ifndef __RCSID 420 #define __RCSID(s) __IDSTRING(rcsid,s) 421 #endif 422 423 #ifndef __RCSID_SOURCE 424 #define __RCSID_SOURCE(s) __IDSTRING(rcsid_source,s) 425 #endif 426 427 #ifndef __COPYRIGHT 428 #define __COPYRIGHT(s) __IDSTRING(copyright,s) 429 #endif 430 431 #ifndef __DECONST 432 #define __DECONST(type, var) ((type)(uintptr_t)(const void *)(var)) 433 #endif 434 435 #ifndef __DEVOLATILE 436 #define __DEVOLATILE(type, var) ((type)(uintptr_t)(volatile void *)(var)) 437 #endif 438 439 #ifndef __DEQUALIFY 440 #define __DEQUALIFY(type, var) ((type)(uintptr_t)(const volatile void *)(var)) 441 #endif 442 443 /* 444 * Keywords added in C11. 445 */ 446 447 #if !__GNUC_PREREQ__(2, 95) 448 #define __alignof(x) __offsetof(struct { char __a; x __b; }, __b) 449 #endif 450 451 /* 452 * Keywords added in C11. 453 */ 454 455 #if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 201112L 456 457 #if !__has_extension(c_alignas) 458 #if (defined(__cplusplus) && __cplusplus >= 201103L) || \ 459 __has_extension(cxx_alignas) 460 #define _Alignas(x) alignas(x) 461 #else 462 /* XXX: Only emulates _Alignas(constant-expression); not _Alignas(type-name). */ 463 #define _Alignas(x) __aligned(x) 464 #endif 465 #endif 466 467 #if defined(__cplusplus) && __cplusplus >= 201103L 468 #define _Alignof(x) alignof(x) 469 #else 470 #define _Alignof(x) __alignof(x) 471 #endif 472 473 #define _Noreturn __dead2 474 475 #if !__has_extension(c_static_assert) 476 #if (defined(__cplusplus) && __cplusplus >= 201103L) || \ 477 __has_extension(cxx_static_assert) 478 #define _Static_assert(x, y) static_assert(x, y) 479 #elif !__GNUC_PREREQ__(4, 6) 480 #define _Static_assert(x, y) struct __hack 481 #ifdef _KERNEL 482 #define CTASSERT(x) _CTASSERT(x, __LINE__) 483 #define _CTASSERT(x, y) __CTASSERT(x, y) 484 #define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1] 485 #endif 486 #endif 487 #endif 488 489 #endif /* __STDC_VERSION__ || __STDC_VERSION__ < 201112L */ 490 491 #if defined(_KERNEL) && !defined(CTASSERT) 492 #define CTASSERT(x) _Static_assert(x, \ 493 "compile-time assertion failed") 494 #endif 495 496 /* 497 * Emulation of C11 _Generic(). Unlike the previously defined C11 498 * keywords, it is not possible to implement this using exactly the same 499 * syntax. Therefore implement something similar under the name 500 * __generic(). Unlike _Generic(), this macro can only distinguish 501 * between a single type, so it requires nested invocations to 502 * distinguish multiple cases. 503 */ 504 505 #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L 506 #define __generic(expr, t, yes, no) \ 507 _Generic(expr, t: yes, default: no) 508 #elif __GNUC_PREREQ__(3, 1) && !defined(__cplusplus) 509 #define __generic(expr, t, yes, no) \ 510 __builtin_choose_expr( \ 511 __builtin_types_compatible_p(__typeof(expr), t), yes, no) 512 #endif 513 514 /*- 515 * POSIX.1 requires that the macros we test be defined before any standard 516 * header file is included. 517 * 518 * Here's a quick run-down of the versions: 519 * defined(_POSIX_SOURCE) 1003.1-1988 520 * _POSIX_C_SOURCE == 1 1003.1-1990 521 * _POSIX_C_SOURCE == 2 1003.2-1992 C Language Binding Option 522 * _POSIX_C_SOURCE == 199309 1003.1b-1993 523 * _POSIX_C_SOURCE == 199506 1003.1c-1995, 1003.1i-1995, 524 * and the omnibus ISO/IEC 9945-1: 1996 525 * _POSIX_C_SOURCE == 200112 1003.1-2001 526 * _POSIX_C_SOURCE == 200809 1003.1-2008 527 * 528 * In addition, the X/Open Portability Guide, which is now the Single UNIX 529 * Specification, defines a feature-test macro which indicates the version of 530 * that specification, and which subsumes _POSIX_C_SOURCE. 531 * 532 * Our macros begin with two underscores to avoid namespace screwage. 533 */ 534 535 /* 536 * If no special macro was specified, make the DragonFly extensions 537 * available. Also make them available when requested so. 538 */ 539 #if (!defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) && \ 540 !defined(_ANSI_SOURCE) && !defined(_C99_SOURCE)) || \ 541 defined(_DRAGONFLY_SOURCE) || defined(_NETBSD_SOURCE) 542 #define __DF_VISIBLE 1 543 #else 544 #define __DF_VISIBLE 0 545 #endif 546 547 /* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */ 548 #if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE - 0) == 1 549 #undef _POSIX_C_SOURCE /* Probably illegal, but beyond caring now. */ 550 #define _POSIX_C_SOURCE 199009 551 #endif 552 553 /* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2. */ 554 #if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE - 0) == 2 555 #undef _POSIX_C_SOURCE 556 #define _POSIX_C_SOURCE 199209 557 #endif 558 559 /* Deal with various X/Open Portability Guides and Single UNIX Spec. */ 560 #ifdef _XOPEN_SOURCE 561 #if _XOPEN_SOURCE - 0 >= 700 562 #define __XSI_VISIBLE 700 563 #undef _POSIX_C_SOURCE 564 #define _POSIX_C_SOURCE 200809 565 #elif _XOPEN_SOURCE - 0 >= 600 566 #define __XSI_VISIBLE 600 567 #undef _POSIX_C_SOURCE 568 #define _POSIX_C_SOURCE 200112 569 #elif _XOPEN_SOURCE - 0 >= 500 570 #define __XSI_VISIBLE 500 571 #undef _POSIX_C_SOURCE 572 #define _POSIX_C_SOURCE 199506 573 #endif 574 #endif 575 576 /* 577 * Deal with all versions of POSIX. The ordering relative to the tests above is 578 * important. 579 */ 580 #if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE) 581 #define _POSIX_C_SOURCE 198808 582 #endif 583 #ifdef _POSIX_C_SOURCE 584 #if (_POSIX_C_SOURCE - 0) >= 200809 585 #define __POSIX_VISIBLE 200809 586 #define __ISO_C_VISIBLE 1999 587 #elif (_POSIX_C_SOURCE - 0) >= 200112 588 #define __POSIX_VISIBLE 200112 589 #define __ISO_C_VISIBLE 1999 590 #elif (_POSIX_C_SOURCE - 0) >= 199506 591 #define __POSIX_VISIBLE 199506 592 #define __ISO_C_VISIBLE 1990 593 #elif (_POSIX_C_SOURCE - 0) >= 199309 594 #define __POSIX_VISIBLE 199309 595 #define __ISO_C_VISIBLE 1990 596 #elif (_POSIX_C_SOURCE - 0) >= 199209 597 #define __POSIX_VISIBLE 199209 598 #define __ISO_C_VISIBLE 1990 599 #elif (_POSIX_C_SOURCE - 0) >= 199009 600 #define __POSIX_VISIBLE 199009 601 #define __ISO_C_VISIBLE 1990 602 #else 603 #define __POSIX_VISIBLE 198808 604 #define __ISO_C_VISIBLE 0 605 #endif /* _POSIX_C_SOURCE */ 606 #else 607 /*- 608 * Deal with _ANSI_SOURCE: 609 * If it is defined, and no other compilation environment is explicitly 610 * requested, then define our internal feature-test macros to zero. This 611 * makes no difference to the preprocessor (undefined symbols in preprocessing 612 * expressions are defined to have value zero), but makes it more convenient for 613 * a test program to print out the values. 614 * 615 * If a program mistakenly defines _ANSI_SOURCE and some other macro such as 616 * _POSIX_C_SOURCE, we will assume that it wants the broader compilation 617 * environment (and in fact we will never get here). 618 */ 619 #ifdef _ANSI_SOURCE /* Hide almost everything. */ 620 #define __POSIX_VISIBLE 0 621 #define __XSI_VISIBLE 0 622 #define __BSD_VISIBLE 0 623 #define __ISO_C_VISIBLE 1990 624 #elif defined(_C99_SOURCE) /* Localism to specify strict C99 env. */ 625 #define __POSIX_VISIBLE 0 626 #define __XSI_VISIBLE 0 627 #define __BSD_VISIBLE 0 628 #define __ISO_C_VISIBLE 1999 629 #elif defined(_C11_SOURCE) /* Localism to specify strict C11 env. */ 630 #define __POSIX_VISIBLE 0 631 #define __XSI_VISIBLE 0 632 #define __BSD_VISIBLE 0 633 #define __ISO_C_VISIBLE 2011 634 #else /* Default environment: show everything. */ 635 #define __POSIX_VISIBLE 200809 636 #define __XSI_VISIBLE 700 637 #define __BSD_VISIBLE 1 638 #define __ISO_C_VISIBLE 2011 639 #endif 640 #endif 641 642 /* 643 * GLOBL macro exists to preserve __start_set_* and __stop_set_* sections 644 * of kernel modules which are discarded from binutils 2.17.50+ otherwise. 645 */ 646 647 #define __GLOBL1(sym) __asm__(".globl " #sym) 648 #define __GLOBL(sym) __GLOBL1(sym) 649 650 /* 651 * Ignore the rcs id of a source file. 652 */ 653 654 #ifndef __FBSDID 655 #define __FBSDID(s) struct __hack 656 #endif 657 658 #ifndef __RCSID 659 #define __RCSID(s) struct __hack 660 #endif 661 662 #ifndef __RCSID_SOURCE 663 #define __RCSID_SOURCE(s) struct __hack 664 #endif 665 666 #ifndef __SCCSID 667 #define __SCCSID(s) struct __hack 668 #endif 669 670 #ifndef __COPYRIGHT 671 #define __COPYRIGHT(s) struct __hack 672 #endif 673 674 #endif /* !_SYS_CDEFS_H_ */ 675