/* $NetBSD: cdefs.h,v 1.58 2004/12/11 05:59:00 christos Exp $ */ /* * Copyright (c) 1991, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Berkeley Software Design, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)cdefs.h 8.8 (Berkeley) 1/9/95 */ #ifndef _SYS_CDEFS_H_ #define _SYS_CDEFS_H_ /* * Testing against Clang-specific extensions. */ #ifndef __has_extension #define __has_extension __has_feature #endif #ifndef __has_feature #define __has_feature(x) 0 #endif #ifndef __has_include #define __has_include(x) 0 #endif #ifndef __has_builtin #define __has_builtin(x) 0 #endif /* * Macro to test if we're using a GNU C compiler of a specific vintage * or later, for e.g. features that appeared in a particular version * of GNU C. Usage: * * #if __GNUC_PREREQ__(major, minor) * ...cool feature... * #else * ...delete feature... * #endif */ #ifdef __GNUC__ #define __GNUC_PREREQ__(x, y) \ ((__GNUC__ == (x) && __GNUC_MINOR__ >= (y)) || \ (__GNUC__ > (x))) #else #define __GNUC_PREREQ__(x, y) 0 #endif #include #if defined(__cplusplus) #define __BEGIN_DECLS extern "C" { #define __END_DECLS } #define __static_cast(x,y) static_cast(y) #else #define __BEGIN_DECLS #define __END_DECLS #define __static_cast(x,y) (x)y #endif /* * The __CONCAT macro is used to concatenate parts of symbol names, e.g. * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo. * The __CONCAT macro is a bit tricky -- make sure you don't put spaces * in between its arguments. __CONCAT can also concatenate double-quoted * strings produced by the __STRING macro, but this only works with ANSI C. */ #define ___STRING(x) __STRING(x) #define ___CONCAT(x,y) __CONCAT(x,y) #if defined(__STDC__) || defined(__cplusplus) #define __P(protos) protos /* full-blown ANSI C */ #define __CONCAT(x,y) x ## y #define __STRING(x) #x #define __const const /* define reserved names to standard */ #define __signed signed #define __volatile volatile #if defined(__cplusplus) #define __inline inline /* convert to C++ keyword */ #else #if !defined(__GNUC__) && !defined(__lint__) #define __inline /* delete GCC keyword */ #endif /* !__GNUC__ && !__lint__ */ #endif /* !__cplusplus */ #else /* !(__STDC__ || __cplusplus) */ #define __P(protos) () /* traditional C preprocessor */ #define __CONCAT(x,y) x/**/y #define __STRING(x) "x" #ifndef __GNUC__ #define __const /* delete pseudo-ANSI C keywords */ #define __inline #define __signed #define __volatile #endif /* !__GNUC__ */ /* * In non-ANSI C environments, new programs will want ANSI-only C keywords * deleted from the program and old programs will want them left alone. * Programs using the ANSI C keywords const, inline etc. as normal * identifiers should define -DNO_ANSI_KEYWORDS. */ #ifndef NO_ANSI_KEYWORDS #define const __const /* convert ANSI C keywords */ #define inline __inline #define signed __signed #define volatile __volatile #endif /* !NO_ANSI_KEYWORDS */ #endif /* !(__STDC__ || __cplusplus) */ /* * Used for internal auditing of the NetBSD source tree. */ #ifdef __AUDIT__ #define __aconst __const #else #define __aconst #endif /* * The following macro is used to remove const cast-away warnings * from gcc -Wcast-qual; it should be used with caution because it * can hide valid errors; in particular most valid uses are in * situations where the API requires it, not to cast away string * constants. We don't use *intptr_t on purpose here and we are * explicit about unsigned long so that we don't have additional * dependencies. */ #define __UNCONST(a) ((void *)(unsigned long)(const void *)(a)) /* * GCC2 provides __extension__ to suppress warnings for various GNU C * language extensions under "-ansi -pedantic". */ #if !__GNUC_PREREQ__(2, 0) #define __extension__ /* delete __extension__ if non-gcc or gcc1 */ #endif /* * GCC1 and some versions of GCC2 declare dead (non-returning) and * pure (no side effects) functions using "volatile" and "const"; * unfortunately, these then cause warnings under "-ansi -pedantic". * GCC2 uses a new, peculiar __attribute__((attrs)) style. All of * these work for GNU C++ (modulo a slight glitch in the C++ grammar * in the distribution version of 2.5.5). */ #if !__GNUC_PREREQ__(2, 5) #define __attribute__(x) /* delete __attribute__ if non-gcc or gcc1 */ #if defined(__GNUC__) && !defined(__STRICT_ANSI__) #define __dead __volatile #define __pure __const #endif #endif /* Delete pseudo-keywords wherever they are not available or needed. */ #ifndef __dead #define __dead #define __pure #endif #if __GNUC_PREREQ__(2, 7) #define __unused __attribute__((__unused__)) #else #define __unused /* delete */ #endif #define __pure2 __attribute__((__const__)) /* Android-added: used by FreeBSD libm */ #if __GNUC_PREREQ__(3, 1) #define __used __attribute__((__used__)) #else #define __used /* delete */ #endif #if __GNUC_PREREQ__(2, 7) #define __packed __attribute__((__packed__)) #define __aligned(x) __attribute__((__aligned__(x))) #define __section(x) __attribute__((__section__(x))) #elif defined(__lint__) #define __packed /* delete */ #define __aligned(x) /* delete */ #define __section(x) /* delete */ #else #define __packed error: no __packed for this compiler #define __aligned(x) error: no __aligned for this compiler #define __section(x) error: no __section for this compiler #endif #if !__GNUC_PREREQ__(2, 8) #define __extension__ #endif #if __GNUC_PREREQ__(2, 8) #define __statement(x) __extension__(x) #elif defined(lint) #define __statement(x) (0) #else #define __statement(x) (x) #endif #define __nonnull(args) __attribute__((__nonnull__ args)) #define __printflike(x, y) __attribute__((__format__(printf, x, y))) __nonnull((x)) #define __scanflike(x, y) __attribute__((__format__(scanf, x, y))) __nonnull((x)) /* * C99 defines the restrict type qualifier keyword, which was made available * in GCC 2.92. */ #if defined(__STDC__VERSION__) && __STDC_VERSION__ >= 199901L #define __restrict restrict #else #if !__GNUC_PREREQ__(2, 92) #define __restrict /* delete __restrict when not supported */ #endif #endif /* * C99 defines __func__ predefined identifier, which was made available * in GCC 2.95. */ #if !defined(__STDC_VERSION__) || !(__STDC_VERSION__ >= 199901L) #if __GNUC_PREREQ__(2, 6) #define __func__ __PRETTY_FUNCTION__ #elif __GNUC_PREREQ__(2, 4) #define __func__ __FUNCTION__ #else #define __func__ "" #endif #endif /* !(__STDC_VERSION__ >= 199901L) */ #if defined(_KERNEL) #if defined(NO_KERNEL_RCSIDS) #undef __KERNEL_RCSID #define __KERNEL_RCSID(_n, _s) /* nothing */ #endif /* NO_KERNEL_RCSIDS */ #endif /* _KERNEL */ #if !defined(_STANDALONE) && !defined(_KERNEL) #ifdef __GNUC__ #define __RENAME(x) ___RENAME(x) #else #ifdef __lint__ #define __RENAME(x) __symbolrename(x) #else #error "No function renaming possible" #endif /* __lint__ */ #endif /* __GNUC__ */ #else /* _STANDALONE || _KERNEL */ #define __RENAME(x) no renaming in kernel or standalone environment #endif /* * A barrier to stop the optimizer from moving code or assume live * register values. This is gcc specific, the version is more or less * arbitrary, might work with older compilers. */ #if __GNUC_PREREQ__(2, 95) #define __insn_barrier() __asm __volatile("":::"memory") #else #define __insn_barrier() /* */ #endif /* * GNU C version 2.96 adds explicit branch prediction so that * the CPU back-end can hint the processor and also so that * code blocks can be reordered such that the predicted path * sees a more linear flow, thus improving cache behavior, etc. * * The following two macros provide us with a way to use this * compiler feature. Use __predict_true() if you expect the expression * to evaluate to true, and __predict_false() if you expect the * expression to evaluate to false. * * A few notes about usage: * * * Generally, __predict_false() error condition checks (unless * you have some _strong_ reason to do otherwise, in which case * document it), and/or __predict_true() `no-error' condition * checks, assuming you want to optimize for the no-error case. * * * Other than that, if you don't know the likelihood of a test * succeeding from empirical or other `hard' evidence, don't * make predictions. * * * These are meant to be used in places that are run `a lot'. * It is wasteful to make predictions in code that is run * seldomly (e.g. at subsystem initialization time) as the * basic block reordering that this affects can often generate * larger code. */ #if __GNUC_PREREQ__(2, 96) #define __predict_true(exp) __builtin_expect((exp) != 0, 1) #define __predict_false(exp) __builtin_expect((exp) != 0, 0) #else #define __predict_true(exp) (exp) #define __predict_false(exp) (exp) #endif #if __GNUC_PREREQ__(2, 96) #define __noreturn __attribute__((__noreturn__)) #define __mallocfunc __attribute__((malloc)) #define __purefunc __attribute__((pure)) #else #define __noreturn #define __mallocfunc #define __purefunc #endif #if __GNUC_PREREQ__(3, 1) #define __always_inline __attribute__((__always_inline__)) #else #define __always_inline #endif #if __GNUC_PREREQ__(3, 4) #define __wur __attribute__((__warn_unused_result__)) #else #define __wur #endif #if __GNUC_PREREQ__(4, 3) #define __errordecl(name, msg) extern void name(void) __attribute__((__error__(msg))) #define __warnattr(msg) __attribute__((__warning__(msg))) #else #define __errordecl(name, msg) extern void name(void) #define __warnattr(msg) #endif /* * Macros for manipulating "link sets". Link sets are arrays of pointers * to objects, which are gathered up by the linker. * * Object format-specific code has provided us with the following macros: * * __link_set_add_text(set, sym) * Add a reference to the .text symbol `sym' to `set'. * * __link_set_add_rodata(set, sym) * Add a reference to the .rodata symbol `sym' to `set'. * * __link_set_add_data(set, sym) * Add a reference to the .data symbol `sym' to `set'. * * __link_set_add_bss(set, sym) * Add a reference to the .bss symbol `sym' to `set'. * * __link_set_decl(set, ptype) * Provide an extern declaration of the set `set', which * contains an array of the pointer type `ptype'. This * macro must be used by any code which wishes to reference * the elements of a link set. * * __link_set_start(set) * This points to the first slot in the link set. * * __link_set_end(set) * This points to the (non-existent) slot after the last * entry in the link set. * * __link_set_count(set) * Count the number of entries in link set `set'. * * In addition, we provide the following macros for accessing link sets: * * __link_set_foreach(pvar, set) * Iterate over the link set `set'. Because a link set is * an array of pointers, pvar must be declared as "type **pvar", * and the actual entry accessed as "*pvar". * * __link_set_entry(set, idx) * Access the link set entry at index `idx' from set `set'. */ #define __link_set_foreach(pvar, set) \ for (pvar = __link_set_start(set); pvar < __link_set_end(set); pvar++) #define __link_set_entry(set, idx) (__link_set_begin(set)[idx]) /* * Some of the FreeBSD sources used in Bionic need this. * Originally, this is used to embed the rcs versions of each source file * in the generated binary. We certainly don't want this in Bionic. */ #define __FBSDID(s) /* nothing */ /*- * The following definitions are an extension of the behavior originally * implemented in , but with a different level of granularity. * POSIX.1 requires that the macros we test be defined before any standard * header file is included. * * Here's a quick run-down of the versions: * defined(_POSIX_SOURCE) 1003.1-1988 * _POSIX_C_SOURCE == 1 1003.1-1990 * _POSIX_C_SOURCE == 2 1003.2-1992 C Language Binding Option * _POSIX_C_SOURCE == 199309 1003.1b-1993 * _POSIX_C_SOURCE == 199506 1003.1c-1995, 1003.1i-1995, * and the omnibus ISO/IEC 9945-1: 1996 * _POSIX_C_SOURCE == 200112 1003.1-2001 * _POSIX_C_SOURCE == 200809 1003.1-2008 * * In addition, the X/Open Portability Guide, which is now the Single UNIX * Specification, defines a feature-test macro which indicates the version of * that specification, and which subsumes _POSIX_C_SOURCE. * * Our macros begin with two underscores to avoid namespace screwage. */ /* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */ #if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 1 #undef _POSIX_C_SOURCE /* Probably illegal, but beyond caring now. */ #define _POSIX_C_SOURCE 199009 #endif /* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2. */ #if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 2 #undef _POSIX_C_SOURCE #define _POSIX_C_SOURCE 199209 #endif /* Deal with various X/Open Portability Guides and Single UNIX Spec. */ #ifdef _XOPEN_SOURCE #if _XOPEN_SOURCE - 0 >= 700 #define __XSI_VISIBLE 700 #undef _POSIX_C_SOURCE #define _POSIX_C_SOURCE 200809 #elif _XOPEN_SOURCE - 0 >= 600 #define __XSI_VISIBLE 600 #undef _POSIX_C_SOURCE #define _POSIX_C_SOURCE 200112 #elif _XOPEN_SOURCE - 0 >= 500 #define __XSI_VISIBLE 500 #undef _POSIX_C_SOURCE #define _POSIX_C_SOURCE 199506 #endif #endif /* * Deal with all versions of POSIX. The ordering relative to the tests above is * important. */ #if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE) #define _POSIX_C_SOURCE 198808 #endif #ifdef _POSIX_C_SOURCE #if _POSIX_C_SOURCE >= 200809 #define __POSIX_VISIBLE 200809 #define __ISO_C_VISIBLE 1999 #elif _POSIX_C_SOURCE >= 200112 #define __POSIX_VISIBLE 200112 #define __ISO_C_VISIBLE 1999 #elif _POSIX_C_SOURCE >= 199506 #define __POSIX_VISIBLE 199506 #define __ISO_C_VISIBLE 1990 #elif _POSIX_C_SOURCE >= 199309 #define __POSIX_VISIBLE 199309 #define __ISO_C_VISIBLE 1990 #elif _POSIX_C_SOURCE >= 199209 #define __POSIX_VISIBLE 199209 #define __ISO_C_VISIBLE 1990 #elif _POSIX_C_SOURCE >= 199009 #define __POSIX_VISIBLE 199009 #define __ISO_C_VISIBLE 1990 #else #define __POSIX_VISIBLE 198808 #define __ISO_C_VISIBLE 0 #endif /* _POSIX_C_SOURCE */ #else /*- * Deal with _ANSI_SOURCE: * If it is defined, and no other compilation environment is explicitly * requested, then define our internal feature-test macros to zero. This * makes no difference to the preprocessor (undefined symbols in preprocessing * expressions are defined to have value zero), but makes it more convenient for * a test program to print out the values. * * If a program mistakenly defines _ANSI_SOURCE and some other macro such as * _POSIX_C_SOURCE, we will assume that it wants the broader compilation * environment (and in fact we will never get here). */ #if defined(_ANSI_SOURCE) /* Hide almost everything. */ #define __POSIX_VISIBLE 0 #define __XSI_VISIBLE 0 #define __BSD_VISIBLE 0 #define __ISO_C_VISIBLE 1990 #elif defined(_C99_SOURCE) /* Localism to specify strict C99 env. */ #define __POSIX_VISIBLE 0 #define __XSI_VISIBLE 0 #define __BSD_VISIBLE 0 #define __ISO_C_VISIBLE 1999 #else /* Default environment: show everything. */ #define __POSIX_VISIBLE 200809 #define __XSI_VISIBLE 700 #define __BSD_VISIBLE 1 #define __ISO_C_VISIBLE 1999 #endif #endif /* * Default values. */ #ifndef __XPG_VISIBLE # define __XPG_VISIBLE 700 #endif #ifndef __POSIX_VISIBLE # define __POSIX_VISIBLE 200809 #endif #ifndef __ISO_C_VISIBLE # define __ISO_C_VISIBLE 1999 #endif #ifndef __BSD_VISIBLE # define __BSD_VISIBLE 1 #endif #define __BIONIC__ 1 #include /* glibc compatibility. */ #if __LP64__ #define __WORDSIZE 64 #else #define __WORDSIZE 32 #endif /* * When _FORTIFY_SOURCE is defined, automatic bounds checking is * added to commonly used libc functions. If a buffer overrun is * detected, the program is safely aborted. * * See * http://gcc.gnu.org/onlinedocs/gcc/Object-Size-Checking.html for details. */ #if defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE > 0 && defined(__OPTIMIZE__) && __OPTIMIZE__ > 0 #define __BIONIC_FORTIFY 1 #if _FORTIFY_SOURCE == 2 #define __bos(s) __builtin_object_size((s), 1) #else #define __bos(s) __builtin_object_size((s), 0) #endif #define __bos0(s) __builtin_object_size((s), 0) #define __BIONIC_FORTIFY_INLINE \ extern __inline__ \ __attribute__ ((always_inline)) \ __attribute__ ((gnu_inline)) #endif #define __BIONIC_FORTIFY_UNKNOWN_SIZE ((size_t) -1) #if defined(__ANDROID__) && !defined(__LP64__) && defined( __arm__) #define __NDK_FPABI__ __attribute__((pcs("aapcs"))) #else #define __NDK_FPABI__ #endif #if (!defined(_NDK_MATH_NO_SOFTFP) || _NDK_MATH_NO_SOFTFP != 1) && !defined(__clang__) #define __NDK_FPABI_MATH__ __NDK_FPABI__ #else #define __NDK_FPABI_MATH__ /* nothing */ #endif #endif /* !_SYS_CDEFS_H_ */