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Diffstat (limited to 'libc/include/sys/cdefs.h')
| -rw-r--r-- | libc/include/sys/cdefs.h | 376 |
1 files changed, 376 insertions, 0 deletions
diff --git a/libc/include/sys/cdefs.h b/libc/include/sys/cdefs.h new file mode 100644 index 0000000..fe7033d --- /dev/null +++ b/libc/include/sys/cdefs.h @@ -0,0 +1,376 @@ +/* $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_ + + +/* our implementation of wchar_t is only 8-bit - die die non-portable code */ +#undef __WCHAR_TYPE__ +#define __WCHAR_TYPE__ unsigned char + + +/* + * 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 + +//XXX #include <machine/cdefs.h> + +/* BIONIC: simpler definition */ +#define __BSD_VISIBLE 1 + +#include <sys/cdefs_elf.h> + +#if defined(__cplusplus) +#define __BEGIN_DECLS extern "C" { +#define __END_DECLS } +#define __static_cast(x,y) static_cast<x>(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 __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 + +#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 + +/* + * C99 defines the restrict type qualifier keyword, which was made available + * in GCC 2.92. + */ +#if __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 !(__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)) +#else +#define __noreturn +#define __mallocfunc +#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]) + +#define __BIONIC__ 1 + +#endif /* !_SYS_CDEFS_H_ */ |