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 * 4. 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: stable/10/sys/sys/cdefs.h 314494 2017-03-01 13:47:36Z avg $ 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_attribute 44#define __has_attribute(x) 0 45#endif 46#ifndef __has_extension 47#define __has_extension __has_feature 48#endif 49#ifndef __has_feature 50#define __has_feature(x) 0 51#endif 52#ifndef __has_include 53#define __has_include(x) 0 54#endif 55#ifndef __has_builtin 56#define __has_builtin(x) 0 57#endif 58 59#if defined(__cplusplus) 60#define __BEGIN_DECLS extern "C" { 61#define __END_DECLS } 62#else 63#define __BEGIN_DECLS 64#define __END_DECLS 65#endif 66 67/* 68 * This code has been put in place to help reduce the addition of 69 * compiler specific defines in FreeBSD code. It helps to aid in 70 * having a compiler-agnostic source tree. 71 */ 72 73#if defined(__GNUC__) || defined(__INTEL_COMPILER) 74 75#if __GNUC__ >= 3 || defined(__INTEL_COMPILER) 76#define __GNUCLIKE_ASM 3 77#define __GNUCLIKE_MATH_BUILTIN_CONSTANTS 78#else 79#define __GNUCLIKE_ASM 2 80#endif 81#define __GNUCLIKE___TYPEOF 1 82#define __GNUCLIKE___OFFSETOF 1 83#define __GNUCLIKE___SECTION 1 84 85#ifndef __INTEL_COMPILER 86# define __GNUCLIKE_CTOR_SECTION_HANDLING 1 87#endif 88 89#define __GNUCLIKE_BUILTIN_CONSTANT_P 1 90# if defined(__INTEL_COMPILER) && defined(__cplusplus) \ 91 && __INTEL_COMPILER < 800 92# undef __GNUCLIKE_BUILTIN_CONSTANT_P 93# endif 94 95#if (__GNUC_MINOR__ > 95 || __GNUC__ >= 3) 96# define __GNUCLIKE_BUILTIN_VARARGS 1 97# define __GNUCLIKE_BUILTIN_STDARG 1 98# define __GNUCLIKE_BUILTIN_VAALIST 1 99#endif 100 101#if defined(__GNUC__) 102# define __GNUC_VA_LIST_COMPATIBILITY 1 103#endif 104 105/* 106 * Compiler memory barriers, specific to gcc and clang. 107 */ 108#if defined(__GNUC__) 109#define __compiler_membar() __asm __volatile(" " : : : "memory") 110#endif 111 112#ifndef __INTEL_COMPILER 113# define __GNUCLIKE_BUILTIN_NEXT_ARG 1 114# define __GNUCLIKE_MATH_BUILTIN_RELOPS 115#endif 116 117#define __GNUCLIKE_BUILTIN_MEMCPY 1 118 119/* XXX: if __GNUC__ >= 2: not tested everywhere originally, where replaced */ 120#define __CC_SUPPORTS_INLINE 1 121#define __CC_SUPPORTS___INLINE 1 122#define __CC_SUPPORTS___INLINE__ 1 123 124#define __CC_SUPPORTS___FUNC__ 1 125#define __CC_SUPPORTS_WARNING 1 126 127#define __CC_SUPPORTS_VARADIC_XXX 1 /* see varargs.h */ 128 129#define __CC_SUPPORTS_DYNAMIC_ARRAY_INIT 1 130 131#endif /* __GNUC__ || __INTEL_COMPILER */ 132 133/* 134 * Macro to test if we're using a specific version of gcc or later. 135 */ 136#if defined(__GNUC__) && !defined(__INTEL_COMPILER) 137#define __GNUC_PREREQ__(ma, mi) \ 138 (__GNUC__ > (ma) || __GNUC__ == (ma) && __GNUC_MINOR__ >= (mi)) 139#else 140#define __GNUC_PREREQ__(ma, mi) 0 141#endif 142 143/* 144 * The __CONCAT macro is used to concatenate parts of symbol names, e.g. 145 * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo. 146 * The __CONCAT macro is a bit tricky to use if it must work in non-ANSI 147 * mode -- there must be no spaces between its arguments, and for nested 148 * __CONCAT's, all the __CONCAT's must be at the left. __CONCAT can also 149 * concatenate double-quoted strings produced by the __STRING macro, but 150 * this only works with ANSI C. 151 * 152 * __XSTRING is like __STRING, but it expands any macros in its argument 153 * first. It is only available with ANSI C. 154 */ 155#if defined(__STDC__) || defined(__cplusplus) 156#define __P(protos) protos /* full-blown ANSI C */ 157#define __CONCAT1(x,y) x ## y 158#define __CONCAT(x,y) __CONCAT1(x,y) 159#define __STRING(x) #x /* stringify without expanding x */ 160#define __XSTRING(x) __STRING(x) /* expand x, then stringify */ 161 162#define __const const /* define reserved names to standard */ 163#define __signed signed 164#define __volatile volatile 165#if defined(__cplusplus) 166#define __inline inline /* convert to C++ keyword */ 167#else 168#if !(defined(__CC_SUPPORTS___INLINE)) 169#define __inline /* delete GCC keyword */ 170#endif /* ! __CC_SUPPORTS___INLINE */ 171#endif /* !__cplusplus */ 172 173#else /* !(__STDC__ || __cplusplus) */ 174#define __P(protos) () /* traditional C preprocessor */ 175#define __CONCAT(x,y) x/**/y 176#define __STRING(x) "x" 177 178#if !defined(__CC_SUPPORTS___INLINE) 179#define __const /* delete pseudo-ANSI C keywords */ 180#define __inline 181#define __signed 182#define __volatile 183/* 184 * In non-ANSI C environments, new programs will want ANSI-only C keywords 185 * deleted from the program and old programs will want them left alone. 186 * When using a compiler other than gcc, programs using the ANSI C keywords 187 * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS. 188 * When using "gcc -traditional", we assume that this is the intent; if 189 * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone. 190 */ 191#ifndef NO_ANSI_KEYWORDS 192#define const /* delete ANSI C keywords */ 193#define inline 194#define signed 195#define volatile 196#endif /* !NO_ANSI_KEYWORDS */ 197#endif /* !__CC_SUPPORTS___INLINE */ 198#endif /* !(__STDC__ || __cplusplus) */ 199 200/* 201 * Compiler-dependent macros to help declare dead (non-returning) and 202 * pure (no side effects) functions, and unused variables. They are 203 * null except for versions of gcc that are known to support the features 204 * properly (old versions of gcc-2 supported the dead and pure features 205 * in a different (wrong) way). If we do not provide an implementation 206 * for a given compiler, let the compile fail if it is told to use 207 * a feature that we cannot live without. 208 */ 209#ifdef lint 210#define __dead2 211#define __pure2 212#define __unused 213#define __packed 214#define __aligned(x) 215#define __section(x) 216#define __weak_symbol 217#else 218#define __weak_symbol __attribute__((__weak__)) 219#if !__GNUC_PREREQ__(2, 5) && !defined(__INTEL_COMPILER) 220#define __dead2 221#define __pure2 222#define __unused 223#endif 224#if __GNUC__ == 2 && __GNUC_MINOR__ >= 5 && __GNUC_MINOR__ < 7 && !defined(__INTEL_COMPILER) 225#define __dead2 __attribute__((__noreturn__)) 226#define __pure2 __attribute__((__const__)) 227#define __unused 228/* XXX Find out what to do for __packed, __aligned and __section */ 229#endif 230#if __GNUC_PREREQ__(2, 7) 231#define __dead2 __attribute__((__noreturn__)) 232#define __pure2 __attribute__((__const__)) 233#define __unused __attribute__((__unused__)) 234#define __used __attribute__((__used__)) 235#define __packed __attribute__((__packed__)) 236#define __aligned(x) __attribute__((__aligned__(x))) 237#define __section(x) __attribute__((__section__(x))) 238#endif 239#if defined(__INTEL_COMPILER) 240#define __dead2 __attribute__((__noreturn__)) 241#define __pure2 __attribute__((__const__)) 242#define __unused __attribute__((__unused__)) 243#define __used __attribute__((__used__)) 244#define __packed __attribute__((__packed__)) 245#define __aligned(x) __attribute__((__aligned__(x))) 246#define __section(x) __attribute__((__section__(x))) 247#endif 248#endif /* lint */ 249 250#if !__GNUC_PREREQ__(2, 95) 251#define __alignof(x) __offsetof(struct { char __a; x __b; }, __b) 252#endif 253 254/* 255 * Keywords added in C11. 256 */ 257 258#if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 201112L || defined(lint) 259 260#if !__has_extension(c_alignas) 261#if (defined(__cplusplus) && __cplusplus >= 201103L) || \ 262 __has_extension(cxx_alignas) 263#define _Alignas(x) alignas(x) 264#else 265/* XXX: Only emulates _Alignas(constant-expression); not _Alignas(type-name). */ 266#define _Alignas(x) __aligned(x) 267#endif 268#endif 269 270#if defined(__cplusplus) && __cplusplus >= 201103L 271#define _Alignof(x) alignof(x) 272#else 273#define _Alignof(x) __alignof(x) 274#endif 275 276#if !defined(__cplusplus) && !__has_extension(c_atomic) && \ 277 !__has_extension(cxx_atomic) 278/* 279 * No native support for _Atomic(). Place object in structure to prevent 280 * most forms of direct non-atomic access. 281 */ 282#define _Atomic(T) struct { T volatile __val; } 283#endif 284 285#if defined(__cplusplus) && __cplusplus >= 201103L 286#define _Noreturn [[noreturn]] 287#else 288#define _Noreturn __dead2 289#endif 290 291#if !__has_extension(c_static_assert) 292#if (defined(__cplusplus) && __cplusplus >= 201103L) || \ 293 __has_extension(cxx_static_assert) 294#define _Static_assert(x, y) static_assert(x, y) 295#elif defined(__COUNTER__) 296#define _Static_assert(x, y) __Static_assert(x, __COUNTER__) 297#define __Static_assert(x, y) ___Static_assert(x, y) 298#define ___Static_assert(x, y) typedef char __assert_ ## y[(x) ? 1 : -1] \ 299 __unused 300#else 301#define _Static_assert(x, y) struct __hack 302#endif 303#endif 304 305#if !__has_extension(c_thread_local) 306/* XXX: Change this to test against C++11 when clang in base supports it. */ 307#if /* (defined(__cplusplus) && __cplusplus >= 201103L) || */ \ 308 __has_extension(cxx_thread_local) 309#define _Thread_local thread_local 310#else 311#define _Thread_local __thread 312#endif 313#endif 314 315#endif /* __STDC_VERSION__ || __STDC_VERSION__ < 201112L */ 316 317/* 318 * Emulation of C11 _Generic(). Unlike the previously defined C11 319 * keywords, it is not possible to implement this using exactly the same 320 * syntax. Therefore implement something similar under the name 321 * __generic(). Unlike _Generic(), this macro can only distinguish 322 * between a single type, so it requires nested invocations to 323 * distinguish multiple cases. 324 */ 325 326#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L 327#define __generic(expr, t, yes, no) \ 328 _Generic(expr, t: yes, default: no) 329#elif __GNUC_PREREQ__(3, 1) && !defined(__cplusplus) 330#define __generic(expr, t, yes, no) \ 331 __builtin_choose_expr( \ 332 __builtin_types_compatible_p(__typeof(expr), t), yes, no) 333#endif 334 335/* 336 * C99 Static array indices in function parameter declarations. Syntax such as: 337 * void bar(int myArray[static 10]); 338 * is allowed in C99 but not in C++. Define __min_size appropriately so 339 * headers using it can be compiled in either language. Use like this: 340 * void bar(int myArray[__min_size(10)]); 341 */ 342#if !defined(__cplusplus) && \ 343 (defined(__clang__) || __GNUC_PREREQ__(4, 6)) && \ 344 (!defined(__STDC_VERSION__) || (__STDC_VERSION__ >= 199901)) 345#define __min_size(x) static (x) 346#else 347#define __min_size(x) (x) 348#endif 349 350#if __GNUC_PREREQ__(2, 96) 351#define __malloc_like __attribute__((__malloc__)) 352#define __pure __attribute__((__pure__)) 353#else 354#define __malloc_like 355#define __pure 356#endif 357 358#if __GNUC_PREREQ__(3, 1) || (defined(__INTEL_COMPILER) && __INTEL_COMPILER >= 800) 359#define __always_inline __attribute__((__always_inline__)) 360#else 361#define __always_inline 362#endif 363 364#if __GNUC_PREREQ__(3, 1) 365#define __noinline __attribute__ ((__noinline__)) 366#else 367#define __noinline 368#endif 369 370#if __GNUC_PREREQ__(3, 3) 371#define __nonnull(x) __attribute__((__nonnull__(x))) 372#else 373#define __nonnull(x) 374#endif 375 376#if __GNUC_PREREQ__(3, 4) 377#define __fastcall __attribute__((__fastcall__)) 378#define __result_use_check __attribute__((__warn_unused_result__)) 379#else 380#define __fastcall 381#define __result_use_check 382#endif 383 384#if __GNUC_PREREQ__(4, 1) 385#define __returns_twice __attribute__((__returns_twice__)) 386#else 387#define __returns_twice 388#endif 389 390/* XXX: should use `#if __STDC_VERSION__ < 199901'. */ 391#if !__GNUC_PREREQ__(2, 7) && !defined(__INTEL_COMPILER) 392#define __func__ NULL 393#endif 394 395#if (defined(__INTEL_COMPILER) || (defined(__GNUC__) && __GNUC__ >= 2)) && !defined(__STRICT_ANSI__) || __STDC_VERSION__ >= 199901 396#define __LONG_LONG_SUPPORTED 397#endif 398 399/* C++11 exposes a load of C99 stuff */ 400#if defined(__cplusplus) && __cplusplus >= 201103L 401#define __LONG_LONG_SUPPORTED 402#ifndef __STDC_LIMIT_MACROS 403#define __STDC_LIMIT_MACROS 404#endif 405#ifndef __STDC_CONSTANT_MACROS 406#define __STDC_CONSTANT_MACROS 407#endif 408#endif 409 410/* 411 * GCC 2.95 provides `__restrict' as an extension to C90 to support the 412 * C99-specific `restrict' type qualifier. We happen to use `__restrict' as 413 * a way to define the `restrict' type qualifier without disturbing older 414 * software that is unaware of C99 keywords. 415 */ 416#if !(__GNUC__ == 2 && __GNUC_MINOR__ == 95) 417#if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 199901 || defined(lint) 418#define __restrict 419#else 420#define __restrict restrict 421#endif 422#endif 423 424/* 425 * GNU C version 2.96 adds explicit branch prediction so that 426 * the CPU back-end can hint the processor and also so that 427 * code blocks can be reordered such that the predicted path 428 * sees a more linear flow, thus improving cache behavior, etc. 429 * 430 * The following two macros provide us with a way to utilize this 431 * compiler feature. Use __predict_true() if you expect the expression 432 * to evaluate to true, and __predict_false() if you expect the 433 * expression to evaluate to false. 434 * 435 * A few notes about usage: 436 * 437 * * Generally, __predict_false() error condition checks (unless 438 * you have some _strong_ reason to do otherwise, in which case 439 * document it), and/or __predict_true() `no-error' condition 440 * checks, assuming you want to optimize for the no-error case. 441 * 442 * * Other than that, if you don't know the likelihood of a test 443 * succeeding from empirical or other `hard' evidence, don't 444 * make predictions. 445 * 446 * * These are meant to be used in places that are run `a lot'. 447 * It is wasteful to make predictions in code that is run 448 * seldomly (e.g. at subsystem initialization time) as the 449 * basic block reordering that this affects can often generate 450 * larger code. 451 */ 452#if __GNUC_PREREQ__(2, 96) 453#define __predict_true(exp) __builtin_expect((exp), 1) 454#define __predict_false(exp) __builtin_expect((exp), 0) 455#else 456#define __predict_true(exp) (exp) 457#define __predict_false(exp) (exp) 458#endif 459 460#if __GNUC_PREREQ__(4, 0) 461#define __hidden __attribute__((__visibility__("hidden"))) 462#define __exported __attribute__((__visibility__("default"))) 463#else 464#define __hidden 465#define __exported 466#endif 467 468/* 469 * We define this here since <stddef.h>, <sys/queue.h>, and <sys/types.h> 470 * require it. 471 */ 472#if __GNUC_PREREQ__(4, 1) 473#define __offsetof(type, field) __builtin_offsetof(type, field) 474#else 475#ifndef __cplusplus 476#define __offsetof(type, field) \ 477 ((__size_t)(__uintptr_t)((const volatile void *)&((type *)0)->field)) 478#else 479#define __offsetof(type, field) \ 480 (__offsetof__ (reinterpret_cast <__size_t> \ 481 (&reinterpret_cast <const volatile char &> \ 482 (static_cast<type *> (0)->field)))) 483#endif 484#endif 485#define __rangeof(type, start, end) \ 486 (__offsetof(type, end) - __offsetof(type, start)) 487 488/* 489 * Given the pointer x to the member m of the struct s, return 490 * a pointer to the containing structure. When using GCC, we first 491 * assign pointer x to a local variable, to check that its type is 492 * compatible with member m. 493 */ 494#if __GNUC_PREREQ__(3, 1) 495#define __containerof(x, s, m) ({ \ 496 const volatile __typeof(((s *)0)->m) *__x = (x); \ 497 __DEQUALIFY(s *, (const volatile char *)__x - __offsetof(s, m));\ 498}) 499#else 500#define __containerof(x, s, m) \ 501 __DEQUALIFY(s *, (const volatile char *)(x) - __offsetof(s, m)) 502#endif 503 504/* 505 * Compiler-dependent macros to declare that functions take printf-like 506 * or scanf-like arguments. They are null except for versions of gcc 507 * that are known to support the features properly (old versions of gcc-2 508 * didn't permit keeping the keywords out of the application namespace). 509 */ 510#if !__GNUC_PREREQ__(2, 7) && !defined(__INTEL_COMPILER) 511#define __printflike(fmtarg, firstvararg) 512#define __scanflike(fmtarg, firstvararg) 513#define __format_arg(fmtarg) 514#define __strfmonlike(fmtarg, firstvararg) 515#define __strftimelike(fmtarg, firstvararg) 516#else 517#define __printflike(fmtarg, firstvararg) \ 518 __attribute__((__format__ (__printf__, fmtarg, firstvararg))) 519#define __scanflike(fmtarg, firstvararg) \ 520 __attribute__((__format__ (__scanf__, fmtarg, firstvararg))) 521#define __format_arg(fmtarg) __attribute__((__format_arg__ (fmtarg))) 522#define __strfmonlike(fmtarg, firstvararg) \ 523 __attribute__((__format__ (__strfmon__, fmtarg, firstvararg))) 524#define __strftimelike(fmtarg, firstvararg) \ 525 __attribute__((__format__ (__strftime__, fmtarg, firstvararg))) 526#endif 527 528/* Compiler-dependent macros that rely on FreeBSD-specific extensions. */ 529#if defined(__FreeBSD_cc_version) && __FreeBSD_cc_version >= 300001 && \ 530 defined(__GNUC__) && !defined(__INTEL_COMPILER) 531#define __printf0like(fmtarg, firstvararg) \ 532 __attribute__((__format__ (__printf0__, fmtarg, firstvararg))) 533#else 534#define __printf0like(fmtarg, firstvararg) 535#endif 536 537#if defined(__GNUC__) || defined(__INTEL_COMPILER) 538#ifndef __INTEL_COMPILER 539#define __strong_reference(sym,aliassym) \ 540 extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym))) 541#endif 542#ifdef __STDC__ 543#define __weak_reference(sym,alias) \ 544 __asm__(".weak " #alias); \ 545 __asm__(".equ " #alias ", " #sym) 546#define __warn_references(sym,msg) \ 547 __asm__(".section .gnu.warning." #sym); \ 548 __asm__(".asciz \"" msg "\""); \ 549 __asm__(".previous") 550#define __sym_compat(sym,impl,verid) \ 551 __asm__(".symver " #impl ", " #sym "@" #verid) 552#define __sym_default(sym,impl,verid) \ 553 __asm__(".symver " #impl ", " #sym "@@" #verid) 554#else 555#define __weak_reference(sym,alias) \ 556 __asm__(".weak alias"); \ 557 __asm__(".equ alias, sym") 558#define __warn_references(sym,msg) \ 559 __asm__(".section .gnu.warning.sym"); \ 560 __asm__(".asciz \"msg\""); \ 561 __asm__(".previous") 562#define __sym_compat(sym,impl,verid) \ 563 __asm__(".symver impl, sym@verid") 564#define __sym_default(impl,sym,verid) \ 565 __asm__(".symver impl, sym@@verid") 566#endif /* __STDC__ */ 567#endif /* __GNUC__ || __INTEL_COMPILER */ 568 569#define __GLOBL1(sym) __asm__(".globl " #sym) 570#define __GLOBL(sym) __GLOBL1(sym) 571 572#if defined(__GNUC__) || defined(__INTEL_COMPILER) 573#define __IDSTRING(name,string) __asm__(".ident\t\"" string "\"") 574#else 575/* 576 * The following definition might not work well if used in header files, 577 * but it should be better than nothing. If you want a "do nothing" 578 * version, then it should generate some harmless declaration, such as: 579 * #define __IDSTRING(name,string) struct __hack 580 */ 581#define __IDSTRING(name,string) static const char name[] __unused = string 582#endif 583 584/* 585 * Embed the rcs id of a source file in the resulting library. Note that in 586 * more recent ELF binutils, we use .ident allowing the ID to be stripped. 587 * Usage: 588 * __FBSDID("$FreeBSD: stable/10/sys/sys/cdefs.h 314494 2017-03-01 13:47:36Z avg $"); 589 */ 590#ifndef __FBSDID 591#if !defined(lint) && !defined(STRIP_FBSDID) 592#define __FBSDID(s) __IDSTRING(__CONCAT(__rcsid_,__LINE__),s) 593#else 594#define __FBSDID(s) struct __hack 595#endif 596#endif 597 598#ifndef __RCSID 599#ifndef NO__RCSID 600#define __RCSID(s) __IDSTRING(__CONCAT(__rcsid_,__LINE__),s) 601#else 602#define __RCSID(s) struct __hack 603#endif 604#endif 605 606#ifndef __RCSID_SOURCE 607#ifndef NO__RCSID_SOURCE 608#define __RCSID_SOURCE(s) __IDSTRING(__CONCAT(__rcsid_source_,__LINE__),s) 609#else 610#define __RCSID_SOURCE(s) struct __hack 611#endif 612#endif 613 614#ifndef __SCCSID 615#ifndef NO__SCCSID 616#define __SCCSID(s) __IDSTRING(__CONCAT(__sccsid_,__LINE__),s) 617#else 618#define __SCCSID(s) struct __hack 619#endif 620#endif 621 622#ifndef __COPYRIGHT 623#ifndef NO__COPYRIGHT 624#define __COPYRIGHT(s) __IDSTRING(__CONCAT(__copyright_,__LINE__),s) 625#else 626#define __COPYRIGHT(s) struct __hack 627#endif 628#endif 629 630#ifndef __DECONST 631#define __DECONST(type, var) ((type)(__uintptr_t)(const void *)(var)) 632#endif 633 634#ifndef __DEVOLATILE 635#define __DEVOLATILE(type, var) ((type)(__uintptr_t)(volatile void *)(var)) 636#endif 637 638#ifndef __DEQUALIFY 639#define __DEQUALIFY(type, var) ((type)(__uintptr_t)(const volatile void *)(var)) 640#endif 641 642/*- 643 * The following definitions are an extension of the behavior originally 644 * implemented in <sys/_posix.h>, but with a different level of granularity. 645 * POSIX.1 requires that the macros we test be defined before any standard 646 * header file is included. 647 * 648 * Here's a quick run-down of the versions: 649 * defined(_POSIX_SOURCE) 1003.1-1988 650 * _POSIX_C_SOURCE == 1 1003.1-1990 651 * _POSIX_C_SOURCE == 2 1003.2-1992 C Language Binding Option 652 * _POSIX_C_SOURCE == 199309 1003.1b-1993 653 * _POSIX_C_SOURCE == 199506 1003.1c-1995, 1003.1i-1995, 654 * and the omnibus ISO/IEC 9945-1: 1996 655 * _POSIX_C_SOURCE == 200112 1003.1-2001 656 * _POSIX_C_SOURCE == 200809 1003.1-2008 657 * 658 * In addition, the X/Open Portability Guide, which is now the Single UNIX 659 * Specification, defines a feature-test macro which indicates the version of 660 * that specification, and which subsumes _POSIX_C_SOURCE. 661 * 662 * Our macros begin with two underscores to avoid namespace screwage. 663 */ 664 665/* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */ 666#if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 1 667#undef _POSIX_C_SOURCE /* Probably illegal, but beyond caring now. */ 668#define _POSIX_C_SOURCE 199009 669#endif 670 671/* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2. */ 672#if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 2 673#undef _POSIX_C_SOURCE 674#define _POSIX_C_SOURCE 199209 675#endif 676 677/* Deal with various X/Open Portability Guides and Single UNIX Spec. */ 678#ifdef _XOPEN_SOURCE 679#if _XOPEN_SOURCE - 0 >= 700 680#define __XSI_VISIBLE 700 681#undef _POSIX_C_SOURCE 682#define _POSIX_C_SOURCE 200809 683#elif _XOPEN_SOURCE - 0 >= 600 684#define __XSI_VISIBLE 600 685#undef _POSIX_C_SOURCE 686#define _POSIX_C_SOURCE 200112 687#elif _XOPEN_SOURCE - 0 >= 500 688#define __XSI_VISIBLE 500 689#undef _POSIX_C_SOURCE 690#define _POSIX_C_SOURCE 199506 691#endif 692#endif 693 694/* 695 * Deal with all versions of POSIX. The ordering relative to the tests above is 696 * important. 697 */ 698#if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE) 699#define _POSIX_C_SOURCE 198808 700#endif 701#ifdef _POSIX_C_SOURCE 702#if _POSIX_C_SOURCE >= 200809 703#define __POSIX_VISIBLE 200809 704#define __ISO_C_VISIBLE 1999 705#elif _POSIX_C_SOURCE >= 200112 706#define __POSIX_VISIBLE 200112 707#define __ISO_C_VISIBLE 1999 708#elif _POSIX_C_SOURCE >= 199506 709#define __POSIX_VISIBLE 199506 710#define __ISO_C_VISIBLE 1990 711#elif _POSIX_C_SOURCE >= 199309 712#define __POSIX_VISIBLE 199309 713#define __ISO_C_VISIBLE 1990 714#elif _POSIX_C_SOURCE >= 199209 715#define __POSIX_VISIBLE 199209 716#define __ISO_C_VISIBLE 1990 717#elif _POSIX_C_SOURCE >= 199009 718#define __POSIX_VISIBLE 199009 719#define __ISO_C_VISIBLE 1990 720#else 721#define __POSIX_VISIBLE 198808 722#define __ISO_C_VISIBLE 0 723#endif /* _POSIX_C_SOURCE */ 724#else 725/*- 726 * Deal with _ANSI_SOURCE: 727 * If it is defined, and no other compilation environment is explicitly 728 * requested, then define our internal feature-test macros to zero. This 729 * makes no difference to the preprocessor (undefined symbols in preprocessing 730 * expressions are defined to have value zero), but makes it more convenient for 731 * a test program to print out the values. 732 * 733 * If a program mistakenly defines _ANSI_SOURCE and some other macro such as 734 * _POSIX_C_SOURCE, we will assume that it wants the broader compilation 735 * environment (and in fact we will never get here). 736 */ 737#if defined(_ANSI_SOURCE) /* Hide almost everything. */ 738#define __POSIX_VISIBLE 0 739#define __XSI_VISIBLE 0 740#define __BSD_VISIBLE 0 741#define __ISO_C_VISIBLE 1990 742#elif defined(_C99_SOURCE) /* Localism to specify strict C99 env. */ 743#define __POSIX_VISIBLE 0 744#define __XSI_VISIBLE 0 745#define __BSD_VISIBLE 0 746#define __ISO_C_VISIBLE 1999 747#elif defined(_C11_SOURCE) /* Localism to specify strict C11 env. */ 748#define __POSIX_VISIBLE 0 749#define __XSI_VISIBLE 0 750#define __BSD_VISIBLE 0 751#define __ISO_C_VISIBLE 2011 752#else /* Default environment: show everything. */ 753#define __POSIX_VISIBLE 200809 754#define __XSI_VISIBLE 700 755#define __BSD_VISIBLE 1 756#define __ISO_C_VISIBLE 2011 757#endif 758#endif 759 760#if defined(__mips) || defined(__powerpc64__) 761#define __NO_TLS 1 762#endif 763 764#endif /* !_SYS_CDEFS_H_ */ 765