1139825Simp/*- 21541Srgrimes * Copyright (c) 1991, 1993 31541Srgrimes * The Regents of the University of California. All rights reserved. 41541Srgrimes * 51541Srgrimes * This code is derived from software contributed to Berkeley by 61541Srgrimes * Berkeley Software Design, Inc. 71541Srgrimes * 81541Srgrimes * Redistribution and use in source and binary forms, with or without 91541Srgrimes * modification, are permitted provided that the following conditions 101541Srgrimes * are met: 111541Srgrimes * 1. Redistributions of source code must retain the above copyright 121541Srgrimes * notice, this list of conditions and the following disclaimer. 131541Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141541Srgrimes * notice, this list of conditions and the following disclaimer in the 151541Srgrimes * documentation and/or other materials provided with the distribution. 161541Srgrimes * 4. Neither the name of the University nor the names of its contributors 171541Srgrimes * may be used to endorse or promote products derived from this software 181541Srgrimes * without specific prior written permission. 191541Srgrimes * 201541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 211541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 221541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 231541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 241541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 251541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 261541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 271541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 281541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 291541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 301541Srgrimes * SUCH DAMAGE. 311541Srgrimes * 3214495Shsu * @(#)cdefs.h 8.8 (Berkeley) 1/9/95 3350477Speter * $FreeBSD$ 341541Srgrimes */ 351541Srgrimes 362165Spaul#ifndef _SYS_CDEFS_H_ 372165Spaul#define _SYS_CDEFS_H_ 381541Srgrimes 39250623Sed/* 40250623Sed * Testing against Clang-specific extensions. 41250623Sed */ 42250623Sed 43250623Sed#ifndef __has_extension 44250623Sed#define __has_extension __has_feature 45250623Sed#endif 46250623Sed#ifndef __has_feature 47250623Sed#define __has_feature(x) 0 48250623Sed#endif 49250623Sed#ifndef __has_include 50250623Sed#define __has_include(x) 0 51250623Sed#endif 52250623Sed#ifndef __has_builtin 53250623Sed#define __has_builtin(x) 0 54250623Sed#endif 55250623Sed 561541Srgrimes#if defined(__cplusplus) 571541Srgrimes#define __BEGIN_DECLS extern "C" { 5836449Sdt#define __END_DECLS } 591541Srgrimes#else 601541Srgrimes#define __BEGIN_DECLS 611541Srgrimes#define __END_DECLS 621541Srgrimes#endif 631541Srgrimes 641541Srgrimes/* 65143063Sjoerg * This code has been put in place to help reduce the addition of 66143063Sjoerg * compiler specific defines in FreeBSD code. It helps to aid in 67143063Sjoerg * having a compiler-agnostic source tree. 68143063Sjoerg */ 69143063Sjoerg 70143063Sjoerg#if defined(__GNUC__) || defined(__INTEL_COMPILER) 71143063Sjoerg 72143063Sjoerg#if __GNUC__ >= 3 || defined(__INTEL_COMPILER) 73143063Sjoerg#define __GNUCLIKE_ASM 3 74143063Sjoerg#define __GNUCLIKE_MATH_BUILTIN_CONSTANTS 75143063Sjoerg#else 76143063Sjoerg#define __GNUCLIKE_ASM 2 77143063Sjoerg#endif 78143063Sjoerg#define __GNUCLIKE___TYPEOF 1 79143063Sjoerg#define __GNUCLIKE___OFFSETOF 1 80143063Sjoerg#define __GNUCLIKE___SECTION 1 81143063Sjoerg 82143063Sjoerg#ifndef __INTEL_COMPILER 83143063Sjoerg# define __GNUCLIKE_CTOR_SECTION_HANDLING 1 84143063Sjoerg#endif 85143063Sjoerg 86143063Sjoerg#define __GNUCLIKE_BUILTIN_CONSTANT_P 1 87143063Sjoerg# if defined(__INTEL_COMPILER) && defined(__cplusplus) \ 88143063Sjoerg && __INTEL_COMPILER < 800 89143063Sjoerg# undef __GNUCLIKE_BUILTIN_CONSTANT_P 90143063Sjoerg# endif 91143063Sjoerg 92150976Snetchild#if (__GNUC_MINOR__ > 95 || __GNUC__ >= 3) && !defined(__INTEL_COMPILER) 93143063Sjoerg# define __GNUCLIKE_BUILTIN_VARARGS 1 94150976Snetchild# define __GNUCLIKE_BUILTIN_STDARG 1 95150976Snetchild# define __GNUCLIKE_BUILTIN_VAALIST 1 96143063Sjoerg#endif 97143063Sjoerg 98143063Sjoerg#if defined(__GNUC__) 99143063Sjoerg# define __GNUC_VA_LIST_COMPATIBILITY 1 100143063Sjoerg#endif 101143063Sjoerg 102241374Sattilio/* 103241374Sattilio * Compiler memory barriers, specific to gcc and clang. 104241374Sattilio */ 105241374Sattilio#if defined(__GNUC__) 106241374Sattilio#define __compiler_membar() __asm __volatile(" " : : : "memory") 107241374Sattilio#endif 108241374Sattilio 109143063Sjoerg#ifndef __INTEL_COMPILER 110143063Sjoerg# define __GNUCLIKE_BUILTIN_NEXT_ARG 1 111143063Sjoerg# define __GNUCLIKE_MATH_BUILTIN_RELOPS 112143063Sjoerg#endif 113143063Sjoerg 114143063Sjoerg#define __GNUCLIKE_BUILTIN_MEMCPY 1 115143063Sjoerg 116143063Sjoerg/* XXX: if __GNUC__ >= 2: not tested everywhere originally, where replaced */ 117143063Sjoerg#define __CC_SUPPORTS_INLINE 1 118143063Sjoerg#define __CC_SUPPORTS___INLINE 1 119143063Sjoerg#define __CC_SUPPORTS___INLINE__ 1 120143063Sjoerg 121143063Sjoerg#define __CC_SUPPORTS___FUNC__ 1 122143063Sjoerg#define __CC_SUPPORTS_WARNING 1 123143063Sjoerg 124143063Sjoerg#define __CC_SUPPORTS_VARADIC_XXX 1 /* see varargs.h */ 125143063Sjoerg 126143063Sjoerg#define __CC_SUPPORTS_DYNAMIC_ARRAY_INIT 1 127143063Sjoerg 128143063Sjoerg#endif /* __GNUC__ || __INTEL_COMPILER */ 129143063Sjoerg 130143063Sjoerg/* 131120608Smux * Macro to test if we're using a specific version of gcc or later. 132120608Smux */ 133126891Strhodes#if defined(__GNUC__) && !defined(__INTEL_COMPILER) 134120608Smux#define __GNUC_PREREQ__(ma, mi) \ 135120629Smux (__GNUC__ > (ma) || __GNUC__ == (ma) && __GNUC_MINOR__ >= (mi)) 136120608Smux#else 137120608Smux#define __GNUC_PREREQ__(ma, mi) 0 138120608Smux#endif 139120608Smux 140120608Smux/* 1411541Srgrimes * The __CONCAT macro is used to concatenate parts of symbol names, e.g. 1421541Srgrimes * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo. 14336971Sbde * The __CONCAT macro is a bit tricky to use if it must work in non-ANSI 14436971Sbde * mode -- there must be no spaces between its arguments, and for nested 14536971Sbde * __CONCAT's, all the __CONCAT's must be at the left. __CONCAT can also 14636971Sbde * concatenate double-quoted strings produced by the __STRING macro, but 14736971Sbde * this only works with ANSI C. 14825083Sjdp * 14925083Sjdp * __XSTRING is like __STRING, but it expands any macros in its argument 15025083Sjdp * first. It is only available with ANSI C. 1511541Srgrimes */ 1521541Srgrimes#if defined(__STDC__) || defined(__cplusplus) 1531541Srgrimes#define __P(protos) protos /* full-blown ANSI C */ 1545012Sbde#define __CONCAT1(x,y) x ## y 1555012Sbde#define __CONCAT(x,y) __CONCAT1(x,y) 15625083Sjdp#define __STRING(x) #x /* stringify without expanding x */ 15725083Sjdp#define __XSTRING(x) __STRING(x) /* expand x, then stringify */ 1581541Srgrimes 1591541Srgrimes#define __const const /* define reserved names to standard */ 1601541Srgrimes#define __signed signed 1611541Srgrimes#define __volatile volatile 1621541Srgrimes#if defined(__cplusplus) 1631541Srgrimes#define __inline inline /* convert to C++ keyword */ 1641541Srgrimes#else 165143063Sjoerg#if !(defined(__CC_SUPPORTS___INLINE)) 1661541Srgrimes#define __inline /* delete GCC keyword */ 167143063Sjoerg#endif /* ! __CC_SUPPORTS___INLINE */ 1681541Srgrimes#endif /* !__cplusplus */ 1691541Srgrimes 1701541Srgrimes#else /* !(__STDC__ || __cplusplus) */ 1711541Srgrimes#define __P(protos) () /* traditional C preprocessor */ 1721541Srgrimes#define __CONCAT(x,y) x/**/y 1731541Srgrimes#define __STRING(x) "x" 1741541Srgrimes 175143063Sjoerg#if !defined(__CC_SUPPORTS___INLINE) 1761541Srgrimes#define __const /* delete pseudo-ANSI C keywords */ 1771541Srgrimes#define __inline 1781541Srgrimes#define __signed 1791541Srgrimes#define __volatile 1801541Srgrimes/* 1811541Srgrimes * In non-ANSI C environments, new programs will want ANSI-only C keywords 1821541Srgrimes * deleted from the program and old programs will want them left alone. 1831541Srgrimes * When using a compiler other than gcc, programs using the ANSI C keywords 1841541Srgrimes * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS. 1851541Srgrimes * When using "gcc -traditional", we assume that this is the intent; if 1861541Srgrimes * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone. 1871541Srgrimes */ 1881541Srgrimes#ifndef NO_ANSI_KEYWORDS 1891541Srgrimes#define const /* delete ANSI C keywords */ 1901541Srgrimes#define inline 1911541Srgrimes#define signed 1921541Srgrimes#define volatile 1935209Snate#endif /* !NO_ANSI_KEYWORDS */ 194143063Sjoerg#endif /* !__CC_SUPPORTS___INLINE */ 1951541Srgrimes#endif /* !(__STDC__ || __cplusplus) */ 1961541Srgrimes 1971541Srgrimes/* 19838509Sbde * Compiler-dependent macros to help declare dead (non-returning) and 19938509Sbde * pure (no side effects) functions, and unused variables. They are 20038509Sbde * null except for versions of gcc that are known to support the features 20138509Sbde * properly (old versions of gcc-2 supported the dead and pure features 202103845Speter * in a different (wrong) way). If we do not provide an implementation 203103845Speter * for a given compiler, let the compile fail if it is told to use 204103845Speter * a feature that we cannot live without. 2051541Srgrimes */ 206103845Speter#ifdef lint 20783443Sasmodai#define __dead2 20883443Sasmodai#define __pure2 20983443Sasmodai#define __unused 210103834Speter#define __packed 211103836Speter#define __aligned(x) 212103841Speter#define __section(x) 213103845Speter#else 214126891Strhodes#if !__GNUC_PREREQ__(2, 5) && !defined(__INTEL_COMPILER) 215103845Speter#define __dead2 216103845Speter#define __pure2 217103845Speter#define __unused 2182059Sdg#endif 219126891Strhodes#if __GNUC__ == 2 && __GNUC_MINOR__ >= 5 && __GNUC_MINOR__ < 7 && !defined(__INTEL_COMPILER) 22083443Sasmodai#define __dead2 __attribute__((__noreturn__)) 22183443Sasmodai#define __pure2 __attribute__((__const__)) 22283443Sasmodai#define __unused 223103845Speter/* XXX Find out what to do for __packed, __aligned and __section */ 2241541Srgrimes#endif 225120608Smux#if __GNUC_PREREQ__(2, 7) 22683443Sasmodai#define __dead2 __attribute__((__noreturn__)) 22783443Sasmodai#define __pure2 __attribute__((__const__)) 22883443Sasmodai#define __unused __attribute__((__unused__)) 229132782Skan#define __used __attribute__((__used__)) 230103834Speter#define __packed __attribute__((__packed__)) 231103834Speter#define __aligned(x) __attribute__((__aligned__(x))) 232103836Speter#define __section(x) __attribute__((__section__(x))) 23317648Speter#endif 234126891Strhodes#if defined(__INTEL_COMPILER) 235126891Strhodes#define __dead2 __attribute__((__noreturn__)) 236126891Strhodes#define __pure2 __attribute__((__const__)) 237126891Strhodes#define __unused __attribute__((__unused__)) 238132782Skan#define __used __attribute__((__used__)) 239126891Strhodes#define __packed __attribute__((__packed__)) 240126891Strhodes#define __aligned(x) __attribute__((__aligned__(x))) 241126891Strhodes#define __section(x) __attribute__((__section__(x))) 242103845Speter#endif 243126891Strhodes#endif 2441541Srgrimes 245228562Sed#if !__GNUC_PREREQ__(2, 95) 246228562Sed#define __alignof(x) __offsetof(struct { char __a; x __b; }, __b) 247228562Sed#endif 248228562Sed 249228477Sed/* 250228897Sed * Keywords added in C11. 251228477Sed */ 252250623Sed 253250623Sed#if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 201112L 254250623Sed 255250623Sed#if !__has_extension(c_alignas) 256250623Sed#if (defined(__cplusplus) && __cplusplus >= 201103L) || \ 257250623Sed __has_extension(cxx_alignas) 258250623Sed#define _Alignas(x) alignas(x) 259250623Sed#else 260250623Sed/* XXX: Only emulates _Alignas(constant-expression); not _Alignas(type-name). */ 261250623Sed#define _Alignas(x) __aligned(x) 262250623Sed#endif 263250623Sed#endif 264250623Sed 265228322Stheraven#if defined(__cplusplus) && __cplusplus >= 201103L 266250623Sed#define _Alignof(x) alignof(x) 267250623Sed#else 268250623Sed#define _Alignof(x) __alignof(x) 269250623Sed#endif 270250623Sed 271251804Sed#if !__has_extension(c_atomic) && !__has_extension(cxx_atomic) 272251804Sed/* 273251804Sed * No native support for _Atomic(). Place object in structure to prevent 274251804Sed * most forms of direct non-atomic access. 275251804Sed */ 276251804Sed#define _Atomic(T) struct { T volatile __val; } 277251804Sed#endif 278251804Sed 279250623Sed#if defined(__cplusplus) && __cplusplus >= 201103L 280228330Stheraven#define _Noreturn [[noreturn]] 281228477Sed#else 282228562Sed#define _Noreturn __dead2 283250623Sed#endif 284250623Sed 285250623Sed#if !__has_extension(c_static_assert) 286250623Sed#if (defined(__cplusplus) && __cplusplus >= 201103L) || \ 287250623Sed __has_extension(cxx_static_assert) 288250623Sed#define _Static_assert(x, y) static_assert(x, y) 289250623Sed#elif defined(__COUNTER__) 290228562Sed#define _Static_assert(x, y) __Static_assert(x, __COUNTER__) 291228562Sed#define __Static_assert(x, y) ___Static_assert(x, y) 292228562Sed#define ___Static_assert(x, y) typedef char __assert_ ## y[(x) ? 1 : -1] 293228495Sed#else 294228562Sed#define _Static_assert(x, y) struct __hack 295228477Sed#endif 296228495Sed#endif 297228322Stheraven 298250623Sed#if !__has_extension(c_thread_local) 299250623Sed/* XXX: Change this to test against C++11 when clang in base supports it. */ 300250623Sed#if /* (defined(__cplusplus) && __cplusplus >= 201103L) || */ \ 301250623Sed __has_extension(cxx_thread_local) 302250623Sed#define _Thread_local thread_local 303250623Sed#else 304250623Sed#define _Thread_local __thread 305250623Sed#endif 306250623Sed#endif 307250623Sed 308250623Sed#endif /* __STDC_VERSION__ || __STDC_VERSION__ < 201112L */ 309250623Sed 310229574Sed/* 311229574Sed * Emulation of C11 _Generic(). Unlike the previously defined C11 312229574Sed * keywords, it is not possible to implement this using exactly the same 313229574Sed * syntax. Therefore implement something similar under the name 314229574Sed * __generic(). Unlike _Generic(), this macro can only distinguish 315229574Sed * between a single type, so it requires nested invocations to 316229574Sed * distinguish multiple cases. 317229574Sed */ 318229574Sed 319229574Sed#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L 320229574Sed#define __generic(expr, t, yes, no) \ 321229574Sed _Generic(expr, t: yes, default: no) 322230277Sed#elif __GNUC_PREREQ__(3, 1) && !defined(__cplusplus) 323229574Sed#define __generic(expr, t, yes, no) \ 324229574Sed __builtin_choose_expr( \ 325229574Sed __builtin_types_compatible_p(__typeof(expr), t), yes, no) 326229574Sed#endif 327229574Sed 328132538Stjr#if __GNUC_PREREQ__(2, 96) 329187961Sdas#define __malloc_like __attribute__((__malloc__)) 330132538Stjr#define __pure __attribute__((__pure__)) 331132538Stjr#else 332187961Sdas#define __malloc_like 333132538Stjr#define __pure 334132538Stjr#endif 335132538Stjr 336126891Strhodes#if __GNUC_PREREQ__(3, 1) || (defined(__INTEL_COMPILER) && __INTEL_COMPILER >= 800) 337117906Speter#define __always_inline __attribute__((__always_inline__)) 338117906Speter#else 339117906Speter#define __always_inline 340117906Speter#endif 341117906Speter 342177618Ssam#if __GNUC_PREREQ__(3, 1) 343177618Ssam#define __noinline __attribute__ ((__noinline__)) 344177618Ssam#else 345177618Ssam#define __noinline 346177618Ssam#endif 347177618Ssam 348120608Smux#if __GNUC_PREREQ__(3, 3) 349117837Sphk#define __nonnull(x) __attribute__((__nonnull__(x))) 350117837Sphk#else 351117837Sphk#define __nonnull(x) 352117837Sphk#endif 353117837Sphk 354237025Sjkim#if __GNUC_PREREQ__(3, 4) 355237025Sjkim#define __fastcall __attribute__((__fastcall__)) 356237025Sjkim#else 357237025Sjkim#define __fastcall 358237025Sjkim#endif 359237025Sjkim 360234785Sdim#if __GNUC_PREREQ__(4, 1) 361234785Sdim#define __returns_twice __attribute__((__returns_twice__)) 362234785Sdim#else 363234785Sdim#define __returns_twice 364234785Sdim#endif 365234785Sdim 36685672Smike/* XXX: should use `#if __STDC_VERSION__ < 199901'. */ 367126891Strhodes#if !__GNUC_PREREQ__(2, 7) && !defined(__INTEL_COMPILER) 36885672Smike#define __func__ NULL 36985672Smike#endif 37085672Smike 371126891Strhodes#if (defined(__INTEL_COMPILER) || (defined(__GNUC__) && __GNUC__ >= 2)) && !defined(__STRICT_ANSI__) || __STDC_VERSION__ >= 199901 37286302Smike#define __LONG_LONG_SUPPORTED 37386302Smike#endif 37486302Smike 375227475Stheraven/* C++11 exposes a load of C99 stuff */ 376227478Sdim#if defined(__cplusplus) && __cplusplus >= 201103L 377227478Sdim#define __LONG_LONG_SUPPORTED 378227478Sdim#ifndef __STDC_LIMIT_MACROS 379227478Sdim#define __STDC_LIMIT_MACROS 380227475Stheraven#endif 381227478Sdim#ifndef __STDC_CONSTANT_MACROS 382227478Sdim#define __STDC_CONSTANT_MACROS 383227478Sdim#endif 384227478Sdim#endif 385227475Stheraven 38638509Sbde/* 387104591Smike * GCC 2.95 provides `__restrict' as an extension to C90 to support the 388103370Swollman * C99-specific `restrict' type qualifier. We happen to use `__restrict' as 389103370Swollman * a way to define the `restrict' type qualifier without disturbing older 390103370Swollman * software that is unaware of C99 keywords. 39186803Smike */ 39286803Smike#if !(__GNUC__ == 2 && __GNUC_MINOR__ == 95) 393189247Sed#if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 199901 || defined(lint) 39486803Smike#define __restrict 39586803Smike#else 39686803Smike#define __restrict restrict 39786803Smike#endif 39886803Smike#endif 39986803Smike 40086803Smike/* 401120609Smux * GNU C version 2.96 adds explicit branch prediction so that 402120609Smux * the CPU back-end can hint the processor and also so that 403120609Smux * code blocks can be reordered such that the predicted path 404120609Smux * sees a more linear flow, thus improving cache behavior, etc. 405120609Smux * 406120609Smux * The following two macros provide us with a way to utilize this 407120609Smux * compiler feature. Use __predict_true() if you expect the expression 408120609Smux * to evaluate to true, and __predict_false() if you expect the 409120609Smux * expression to evaluate to false. 410120609Smux * 411120609Smux * A few notes about usage: 412120609Smux * 413120609Smux * * Generally, __predict_false() error condition checks (unless 414120609Smux * you have some _strong_ reason to do otherwise, in which case 415120609Smux * document it), and/or __predict_true() `no-error' condition 416120609Smux * checks, assuming you want to optimize for the no-error case. 417120609Smux * 418120609Smux * * Other than that, if you don't know the likelihood of a test 419120609Smux * succeeding from empirical or other `hard' evidence, don't 420120609Smux * make predictions. 421120609Smux * 422120609Smux * * These are meant to be used in places that are run `a lot'. 423120609Smux * It is wasteful to make predictions in code that is run 424120609Smux * seldomly (e.g. at subsystem initialization time) as the 425120609Smux * basic block reordering that this affects can often generate 426120609Smux * larger code. 427120609Smux */ 428120609Smux#if __GNUC_PREREQ__(2, 96) 429120609Smux#define __predict_true(exp) __builtin_expect((exp), 1) 430120609Smux#define __predict_false(exp) __builtin_expect((exp), 0) 431120609Smux#else 432120609Smux#define __predict_true(exp) (exp) 433120609Smux#define __predict_false(exp) (exp) 434120609Smux#endif 435120609Smux 436211335Skib#if __GNUC_PREREQ__(4, 2) 437211868Skib#define __hidden __attribute__((__visibility__("hidden"))) 438211868Skib#define __exported __attribute__((__visibility__("default"))) 439211335Skib#else 440211335Skib#define __hidden 441211335Skib#define __exported 442211335Skib#endif 443211335Skib 444120609Smux/* 44599594Smike * We define this here since <stddef.h>, <sys/queue.h>, and <sys/types.h> 44699594Smike * require it. 44799594Smike */ 448162488Skan#if __GNUC_PREREQ__(4, 1) 449162488Skan#define __offsetof(type, field) __builtin_offsetof(type, field) 450162488Skan#else 451146941Skan#ifndef __cplusplus 452228562Sed#define __offsetof(type, field) \ 453228564Sed ((__size_t)(__uintptr_t)((const volatile void *)&((type *)0)->field)) 454146941Skan#else 455146941Skan#define __offsetof(type, field) \ 456228562Sed (__offsetof__ (reinterpret_cast <__size_t> \ 457146941Skan (&reinterpret_cast <const volatile char &> \ 458146941Skan (static_cast<type *> (0)->field)))) 459146941Skan#endif 460162488Skan#endif 461133604Sjulian#define __rangeof(type, start, end) \ 462133604Sjulian (__offsetof(type, end) - __offsetof(type, start)) 46399594Smike 46499594Smike/* 465240450Sed * Given the pointer x to the member m of the struct s, return 466240450Sed * a pointer to the containing structure. When using GCC, we first 467240450Sed * assign pointer x to a local variable, to check that its type is 468240450Sed * compatible with member m. 469240450Sed */ 470240450Sed#if __GNUC_PREREQ__(3, 1) 471240450Sed#define __containerof(x, s, m) ({ \ 472240450Sed const volatile __typeof(((s *)0)->m) *__x = (x); \ 473240450Sed __DEQUALIFY(s *, (const volatile char *)__x - __offsetof(s, m));\ 474240450Sed}) 475240450Sed#else 476240450Sed#define __containerof(x, s, m) \ 477240450Sed __DEQUALIFY(s *, (const volatile char *)(x) - __offsetof(s, m)) 478240450Sed#endif 479240450Sed 480240450Sed/* 48138509Sbde * Compiler-dependent macros to declare that functions take printf-like 48238509Sbde * or scanf-like arguments. They are null except for versions of gcc 48338509Sbde * that are known to support the features properly (old versions of gcc-2 48438509Sbde * didn't permit keeping the keywords out of the application namespace). 48538509Sbde */ 486126891Strhodes#if !__GNUC_PREREQ__(2, 7) && !defined(__INTEL_COMPILER) 48737614Sbde#define __printflike(fmtarg, firstvararg) 48837614Sbde#define __scanflike(fmtarg, firstvararg) 489154867Sstefanf#define __format_arg(fmtarg) 490232498Stheraven#define __strfmonlike(fmtarg, firstvararg) 491232498Stheraven#define __strftimelike(fmtarg, firstvararg) 49237614Sbde#else 49337614Sbde#define __printflike(fmtarg, firstvararg) \ 49437614Sbde __attribute__((__format__ (__printf__, fmtarg, firstvararg))) 49537614Sbde#define __scanflike(fmtarg, firstvararg) \ 49637614Sbde __attribute__((__format__ (__scanf__, fmtarg, firstvararg))) 497154867Sstefanf#define __format_arg(fmtarg) __attribute__((__format_arg__ (fmtarg))) 498232498Stheraven#define __strfmonlike(fmtarg, firstvararg) \ 499232498Stheraven __attribute__((__format__ (__strfmon__, fmtarg, firstvararg))) 500232498Stheraven#define __strftimelike(fmtarg, firstvararg) \ 501232498Stheraven __attribute__((__format__ (__strftime__, fmtarg, firstvararg))) 50237614Sbde#endif 50337614Sbde 50440716Sjdp/* Compiler-dependent macros that rely on FreeBSD-specific extensions. */ 505227082Srmh#if defined(__FreeBSD_cc_version) && __FreeBSD_cc_version >= 300001 && \ 506227082Srmh defined(__GNUC__) && !defined(__INTEL_COMPILER) 50740716Sjdp#define __printf0like(fmtarg, firstvararg) \ 50840716Sjdp __attribute__((__format__ (__printf0__, fmtarg, firstvararg))) 50940716Sjdp#else 51040716Sjdp#define __printf0like(fmtarg, firstvararg) 51140716Sjdp#endif 51240716Sjdp 513126891Strhodes#if defined(__GNUC__) || defined(__INTEL_COMPILER) 514126891Strhodes#ifndef __INTEL_COMPILER 51583443Sasmodai#define __strong_reference(sym,aliassym) \ 516148005Skbyanc extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym))) 517126891Strhodes#endif 5185209Snate#ifdef __STDC__ 51937052Speter#define __weak_reference(sym,alias) \ 52037052Speter __asm__(".weak " #alias); \ 52137862Sdfr __asm__(".equ " #alias ", " #sym) 52237052Speter#define __warn_references(sym,msg) \ 52337052Speter __asm__(".section .gnu.warning." #sym); \ 52439502Sjdp __asm__(".asciz \"" msg "\""); \ 52537052Speter __asm__(".previous") 526156607Sdeischen#define __sym_compat(sym,impl,verid) \ 527156607Sdeischen __asm__(".symver " #impl ", " #sym "@" #verid) 528156607Sdeischen#define __sym_default(sym,impl,verid) \ 529156607Sdeischen __asm__(".symver " #impl ", " #sym "@@" #verid) 53037052Speter#else 53137052Speter#define __weak_reference(sym,alias) \ 53237052Speter __asm__(".weak alias"); \ 53337862Sdfr __asm__(".equ alias, sym") 53437052Speter#define __warn_references(sym,msg) \ 53537052Speter __asm__(".section .gnu.warning.sym"); \ 53639502Sjdp __asm__(".asciz \"msg\""); \ 53737052Speter __asm__(".previous") 538156607Sdeischen#define __sym_compat(sym,impl,verid) \ 539156607Sdeischen __asm__(".symver impl, sym@verid") 540156607Sdeischen#define __sym_default(impl,sym,verid) \ 541156607Sdeischen __asm__(".symver impl, sym@@verid") 54237052Speter#endif /* __STDC__ */ 543126891Strhodes#endif /* __GNUC__ || __INTEL_COMPILER */ 5445209Snate 545215701Sdim#define __GLOBL1(sym) __asm__(".globl " #sym) 546215701Sdim#define __GLOBL(sym) __GLOBL1(sym) 547215137Sdim 548126891Strhodes#if defined(__GNUC__) || defined(__INTEL_COMPILER) 54950614Speter#define __IDSTRING(name,string) __asm__(".ident\t\"" string "\"") 55050614Speter#else 55183049Speter/* 552118023Sgad * The following definition might not work well if used in header files, 553118023Sgad * but it should be better than nothing. If you want a "do nothing" 554118023Sgad * version, then it should generate some harmless declaration, such as: 555118023Sgad * #define __IDSTRING(name,string) struct __hack 55683049Speter */ 55736971Sbde#define __IDSTRING(name,string) static const char name[] __unused = string 55850614Speter#endif 55931707Spst 56083552Sdillon/* 56183552Sdillon * Embed the rcs id of a source file in the resulting library. Note that in 56283552Sdillon * more recent ELF binutils, we use .ident allowing the ID to be stripped. 56383552Sdillon * Usage: 56483552Sdillon * __FBSDID("$FreeBSD$"); 56583552Sdillon */ 56683489Sdillon#ifndef __FBSDID 56783528Sobrien#if !defined(lint) && !defined(STRIP_FBSDID) 56883526Sobrien#define __FBSDID(s) __IDSTRING(__CONCAT(__rcsid_,__LINE__),s) 56983489Sdillon#else 57083552Sdillon#define __FBSDID(s) struct __hack 57183489Sdillon#endif 57283489Sdillon#endif 57383489Sdillon 57493996Sobrien#ifndef __RCSID 57593996Sobrien#ifndef NO__RCSID 57693993Sobrien#define __RCSID(s) __IDSTRING(__CONCAT(__rcsid_,__LINE__),s) 57793996Sobrien#else 578118023Sgad#define __RCSID(s) struct __hack 57993993Sobrien#endif 58093996Sobrien#endif 58193993Sobrien 58293996Sobrien#ifndef __RCSID_SOURCE 58393996Sobrien#ifndef NO__RCSID_SOURCE 58483049Speter#define __RCSID_SOURCE(s) __IDSTRING(__CONCAT(__rcsid_source_,__LINE__),s) 58593996Sobrien#else 586118023Sgad#define __RCSID_SOURCE(s) struct __hack 58731707Spst#endif 58893996Sobrien#endif 58931707Spst 59093996Sobrien#ifndef __SCCSID 59193996Sobrien#ifndef NO__SCCSID 59293996Sobrien#define __SCCSID(s) __IDSTRING(__CONCAT(__sccsid_,__LINE__),s) 59393996Sobrien#else 594118023Sgad#define __SCCSID(s) struct __hack 59593996Sobrien#endif 59693996Sobrien#endif 59793996Sobrien 59893996Sobrien#ifndef __COPYRIGHT 59993996Sobrien#ifndef NO__COPYRIGHT 60083049Speter#define __COPYRIGHT(s) __IDSTRING(__CONCAT(__copyright_,__LINE__),s) 60193996Sobrien#else 602118023Sgad#define __COPYRIGHT(s) struct __hack 60331707Spst#endif 60493996Sobrien#endif 60531707Spst 60674070Sbillf#ifndef __DECONST 607228562Sed#define __DECONST(type, var) ((type)(__uintptr_t)(const void *)(var)) 60874070Sbillf#endif 60974070Sbillf 61074070Sbillf#ifndef __DEVOLATILE 611228562Sed#define __DEVOLATILE(type, var) ((type)(__uintptr_t)(volatile void *)(var)) 61274070Sbillf#endif 61374070Sbillf 61474070Sbillf#ifndef __DEQUALIFY 615228562Sed#define __DEQUALIFY(type, var) ((type)(__uintptr_t)(const volatile void *)(var)) 61674070Sbillf#endif 61774070Sbillf 618210226Strasz/*- 61993510Smike * The following definitions are an extension of the behavior originally 62099904Smikeh * implemented in <sys/_posix.h>, but with a different level of granularity. 62193510Smike * POSIX.1 requires that the macros we test be defined before any standard 62293510Smike * header file is included. 62393510Smike * 62493510Smike * Here's a quick run-down of the versions: 62593510Smike * defined(_POSIX_SOURCE) 1003.1-1988 62693510Smike * _POSIX_C_SOURCE == 1 1003.1-1990 627100109Swollman * _POSIX_C_SOURCE == 2 1003.2-1992 C Language Binding Option 62893510Smike * _POSIX_C_SOURCE == 199309 1003.1b-1993 62993510Smike * _POSIX_C_SOURCE == 199506 1003.1c-1995, 1003.1i-1995, 63093510Smike * and the omnibus ISO/IEC 9945-1: 1996 63193510Smike * _POSIX_C_SOURCE == 200112 1003.1-2001 632189134Sdas * _POSIX_C_SOURCE == 200809 1003.1-2008 63393510Smike * 63493510Smike * In addition, the X/Open Portability Guide, which is now the Single UNIX 63593510Smike * Specification, defines a feature-test macro which indicates the version of 63693510Smike * that specification, and which subsumes _POSIX_C_SOURCE. 63793510Smike * 63893510Smike * Our macros begin with two underscores to avoid namespace screwage. 63993510Smike */ 64093510Smike 64193510Smike/* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */ 642121783Speter#if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 1 64393510Smike#undef _POSIX_C_SOURCE /* Probably illegal, but beyond caring now. */ 64493510Smike#define _POSIX_C_SOURCE 199009 64593510Smike#endif 64693510Smike 647100109Swollman/* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2. */ 648121783Speter#if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 2 649100109Swollman#undef _POSIX_C_SOURCE 650100109Swollman#define _POSIX_C_SOURCE 199209 651100109Swollman#endif 652100109Swollman 65393510Smike/* Deal with various X/Open Portability Guides and Single UNIX Spec. */ 65493510Smike#ifdef _XOPEN_SOURCE 655189134Sdas#if _XOPEN_SOURCE - 0 >= 700 656189134Sdas#define __XSI_VISIBLE 700 657189134Sdas#undef _POSIX_C_SOURCE 658189134Sdas#define _POSIX_C_SOURCE 200809 659189134Sdas#elif _XOPEN_SOURCE - 0 >= 600 66093510Smike#define __XSI_VISIBLE 600 66193510Smike#undef _POSIX_C_SOURCE 66293510Smike#define _POSIX_C_SOURCE 200112 66393715Speter#elif _XOPEN_SOURCE - 0 >= 500 66493510Smike#define __XSI_VISIBLE 500 66593510Smike#undef _POSIX_C_SOURCE 66693510Smike#define _POSIX_C_SOURCE 199506 66793510Smike#endif 66893510Smike#endif 66993510Smike 67093510Smike/* 67193510Smike * Deal with all versions of POSIX. The ordering relative to the tests above is 67293510Smike * important. 67393510Smike */ 67493510Smike#if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE) 67593510Smike#define _POSIX_C_SOURCE 198808 67693510Smike#endif 67793510Smike#ifdef _POSIX_C_SOURCE 678189134Sdas#if _POSIX_C_SOURCE >= 200809 679189134Sdas#define __POSIX_VISIBLE 200809 680189134Sdas#define __ISO_C_VISIBLE 1999 681189209Sdas#elif _POSIX_C_SOURCE >= 200112 68293510Smike#define __POSIX_VISIBLE 200112 68393510Smike#define __ISO_C_VISIBLE 1999 68493510Smike#elif _POSIX_C_SOURCE >= 199506 68593510Smike#define __POSIX_VISIBLE 199506 68693510Smike#define __ISO_C_VISIBLE 1990 68793510Smike#elif _POSIX_C_SOURCE >= 199309 68893510Smike#define __POSIX_VISIBLE 199309 68993510Smike#define __ISO_C_VISIBLE 1990 690100109Swollman#elif _POSIX_C_SOURCE >= 199209 691100109Swollman#define __POSIX_VISIBLE 199209 692100109Swollman#define __ISO_C_VISIBLE 1990 69393510Smike#elif _POSIX_C_SOURCE >= 199009 69493510Smike#define __POSIX_VISIBLE 199009 69593510Smike#define __ISO_C_VISIBLE 1990 69693510Smike#else 69793510Smike#define __POSIX_VISIBLE 198808 69893510Smike#define __ISO_C_VISIBLE 0 69993510Smike#endif /* _POSIX_C_SOURCE */ 70093510Smike#else 701210226Strasz/*- 70293510Smike * Deal with _ANSI_SOURCE: 70393510Smike * If it is defined, and no other compilation environment is explicitly 70493510Smike * requested, then define our internal feature-test macros to zero. This 70593510Smike * makes no difference to the preprocessor (undefined symbols in preprocessing 70693510Smike * expressions are defined to have value zero), but makes it more convenient for 70793510Smike * a test program to print out the values. 70893510Smike * 70993510Smike * If a program mistakenly defines _ANSI_SOURCE and some other macro such as 71093510Smike * _POSIX_C_SOURCE, we will assume that it wants the broader compilation 71193510Smike * environment (and in fact we will never get here). 71293510Smike */ 713105654Smike#if defined(_ANSI_SOURCE) /* Hide almost everything. */ 71493510Smike#define __POSIX_VISIBLE 0 71593510Smike#define __XSI_VISIBLE 0 71693510Smike#define __BSD_VISIBLE 0 71793510Smike#define __ISO_C_VISIBLE 1990 718105654Smike#elif defined(_C99_SOURCE) /* Localism to specify strict C99 env. */ 719105654Smike#define __POSIX_VISIBLE 0 720105654Smike#define __XSI_VISIBLE 0 721105654Smike#define __BSD_VISIBLE 0 722105654Smike#define __ISO_C_VISIBLE 1999 723228900Sed#elif defined(_C11_SOURCE) /* Localism to specify strict C11 env. */ 724228900Sed#define __POSIX_VISIBLE 0 725228900Sed#define __XSI_VISIBLE 0 726228900Sed#define __BSD_VISIBLE 0 727228900Sed#define __ISO_C_VISIBLE 2011 72893510Smike#else /* Default environment: show everything. */ 729189134Sdas#define __POSIX_VISIBLE 200809 730189134Sdas#define __XSI_VISIBLE 700 73193510Smike#define __BSD_VISIBLE 1 732228900Sed#define __ISO_C_VISIBLE 2011 73393510Smike#endif 73493510Smike#endif 73593510Smike 736232498Stheraven#if defined(__mips) || defined(__powerpc64__) 737232498Stheraven#define __NO_TLS 1 738232498Stheraven#endif 739232498Stheraven 7402212Sbde#endif /* !_SYS_CDEFS_H_ */ 741