| 1 | /*
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| 2 | * Copyright (c) 1991, 1993
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| 3 | * The Regents of the University of California. All rights reserved.
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| 4 | *
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| 5 | * This code is derived from software contributed to Berkeley by
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| 6 | * Berkeley Software Design, Inc.
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| 7 | *
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| 8 | * Redistribution and use in source and binary forms, with or without
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| 9 | * modification, are permitted provided that the following conditions
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| 10 | * are met:
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| 11 | * 1. Redistributions of source code must retain the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer.
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| 13 | * 2. Redistributions in binary form must reproduce the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer in the
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| 15 | * documentation and/or other materials provided with the distribution.
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| 16 | * 3. All advertising materials mentioning features or use of this software
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| 17 | * must display the following acknowledgement:
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| 18 | * This product includes software developed by the University of
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| 19 | * California, Berkeley and its contributors.
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| 20 | * 4. Neither the name of the University nor the names of its contributors
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| 21 | * may be used to endorse or promote products derived from this software
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| 22 | * without specific prior written permission.
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| 23 | *
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| 24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 34 | * SUCH DAMAGE.
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| 35 | *
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| 36 | * @(#)cdefs.h 8.8 (Berkeley) 1/9/95
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| 37 | * $FreeBSD: src/sys/sys/cdefs.h,v 1.69 2003/04/18 18:59:34 bde Exp $
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| 38 | */
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| 39 |
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| 40 | /** @file
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| 41 | * FreeBSD 5.1
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| 42 | *
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| 43 | * @changed bird: Toolkit compatibility (_CDEFS_H_ and __TCPROTO()).
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| 44 | * @changed zap: _System definition for older GCC compilers.
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| 45 | */
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| 46 |
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| 47 |
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| 48 | #ifndef _SYS_CDEFS_H_
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| 49 | #define _SYS_CDEFS_H_
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| 50 | #define _CDEFS_H_ /* bird: compatability */
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| 51 |
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| 52 | #if defined(__cplusplus)
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| 53 | #define __BEGIN_DECLS extern "C" {
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| 54 | #define __END_DECLS }
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| 55 | #else
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| 56 | #define __BEGIN_DECLS
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| 57 | #define __END_DECLS
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| 58 | #endif
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| 59 |
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| 60 | /*
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| 61 | * The __CONCAT macro is used to concatenate parts of symbol names, e.g.
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| 62 | * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
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| 63 | * The __CONCAT macro is a bit tricky to use if it must work in non-ANSI
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| 64 | * mode -- there must be no spaces between its arguments, and for nested
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| 65 | * __CONCAT's, all the __CONCAT's must be at the left. __CONCAT can also
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| 66 | * concatenate double-quoted strings produced by the __STRING macro, but
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| 67 | * this only works with ANSI C.
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| 68 | *
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| 69 | * __XSTRING is like __STRING, but it expands any macros in its argument
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| 70 | * first. It is only available with ANSI C.
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| 71 | */
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| 72 | #if defined(__STDC__) || defined(__cplusplus)
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| 73 | #define __P(protos) protos /* full-blown ANSI C */
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| 74 | #define __CONCAT1(x,y) x ## y
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| 75 | #define __CONCAT(x,y) __CONCAT1(x,y)
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| 76 | #define __STRING(x) #x /* stringify without expanding x */
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| 77 | #define __XSTRING(x) __STRING(x) /* expand x, then stringify */
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| 78 |
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| 79 | #define __const const /* define reserved names to standard */
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| 80 | #define __signed signed
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| 81 | #define __volatile volatile
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| 82 | #if defined(__cplusplus)
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| 83 | #define __inline inline /* convert to C++ keyword */
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| 84 | #else
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| 85 | #ifndef __GNUC__
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| 86 | #define __inline /* delete GCC keyword */
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| 87 | #endif /* !__GNUC__ */
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| 88 | #endif /* !__cplusplus */
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| 89 |
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| 90 | #else /* !(__STDC__ || __cplusplus) */
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| 91 | #define __P(protos) () /* traditional C preprocessor */
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| 92 | #define __CONCAT(x,y) x/**/y
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| 93 | #define __STRING(x) "x"
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| 94 |
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| 95 | #ifndef __GNUC__
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| 96 | #define __const /* delete pseudo-ANSI C keywords */
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| 97 | #define __inline
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| 98 | #define __signed
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| 99 | #define __volatile
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| 100 | /*
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| 101 | * In non-ANSI C environments, new programs will want ANSI-only C keywords
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| 102 | * deleted from the program and old programs will want them left alone.
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| 103 | * When using a compiler other than gcc, programs using the ANSI C keywords
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| 104 | * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS.
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| 105 | * When using "gcc -traditional", we assume that this is the intent; if
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| 106 | * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone.
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| 107 | */
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| 108 | #ifndef NO_ANSI_KEYWORDS
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| 109 | #define const /* delete ANSI C keywords */
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| 110 | #define inline
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| 111 | #define signed
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| 112 | #define volatile
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| 113 | #endif /* !NO_ANSI_KEYWORDS */
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| 114 | #endif /* !__GNUC__ */
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| 115 | #endif /* !(__STDC__ || __cplusplus) */
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| 116 |
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| 117 | /*
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| 118 | * Compiler-dependent macros to help declare dead (non-returning) and
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| 119 | * pure (no side effects) functions, and unused variables. They are
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| 120 | * null except for versions of gcc that are known to support the features
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| 121 | * properly (old versions of gcc-2 supported the dead and pure features
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| 122 | * in a different (wrong) way). If we do not provide an implementation
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| 123 | * for a given compiler, let the compile fail if it is told to use
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| 124 | * a feature that we cannot live without.
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| 125 | */
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| 126 | #ifdef lint
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| 127 | #define __dead2
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| 128 | #define __pure2
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| 129 | #define __unused
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| 130 | #define __packed
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| 131 | #define __aligned(x)
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| 132 | #define __section(x)
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| 133 | #else
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| 134 | #if __GNUC__ < 2 || __GNUC__ == 2 && __GNUC_MINOR__ < 5
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| 135 | #define __dead2
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| 136 | #define __pure2
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| 137 | #define __unused
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| 138 | #endif
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| 139 | #if __GNUC__ == 2 && __GNUC_MINOR__ >= 5 && __GNUC_MINOR__ < 7
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| 140 | #define __dead2 __attribute__((__noreturn__))
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| 141 | #define __pure2 __attribute__((__const__))
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| 142 | #define __unused
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| 143 | /* XXX Find out what to do for __packed, __aligned and __section */
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| 144 | #endif
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| 145 | #if __GNUC__ == 2 && __GNUC_MINOR__ >= 7 || __GNUC__ == 3
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| 146 | #define __dead2 __attribute__((__noreturn__))
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| 147 | #define __pure2 __attribute__((__const__))
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| 148 | #define __unused __attribute__((__unused__))
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| 149 | #define __packed __attribute__((__packed__))
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| 150 | #define __aligned(x) __attribute__((__aligned__(x)))
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| 151 | #define __section(x) __attribute__((__section__(x)))
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| 152 | #endif
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| 153 | #endif
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| 154 |
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| 155 | /* XXX: should use `#if __STDC_VERSION__ < 199901'. */
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| 156 | #if !(__GNUC__ == 2 && __GNUC_MINOR__ >= 7 || __GNUC__ >= 3)
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| 157 | #define __func__ NULL
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| 158 | #endif
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| 159 |
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| 160 | #if __GNUC__ >= 2 && !defined(__STRICT_ANSI__) || __STDC_VERSION__ >= 199901
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| 161 | #define __LONG_LONG_SUPPORTED
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| 162 | #endif
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| 163 |
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| 164 | /*
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| 165 | * GCC 2.95 provides `__restrict' as an extension to C90 to support the
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| 166 | * C99-specific `restrict' type qualifier. We happen to use `__restrict' as
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| 167 | * a way to define the `restrict' type qualifier without disturbing older
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| 168 | * software that is unaware of C99 keywords.
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| 169 | */
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| 170 | #if !(__GNUC__ == 2 && __GNUC_MINOR__ == 95)
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| 171 | #if __STDC_VERSION__ < 199901
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| 172 | #define __restrict
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| 173 | #else
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| 174 | #define __restrict restrict
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| 175 | #endif
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| 176 | #endif
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| 177 |
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| 178 | /*
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| 179 | * We define this here since <stddef.h>, <sys/queue.h>, and <sys/types.h>
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| 180 | * require it.
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| 181 | */
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| 182 | #define __offsetof(type, field) ((size_t)(&((type *)0)->field))
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| 183 |
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| 184 | /*
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| 185 | * Compiler-dependent macros to declare that functions take printf-like
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| 186 | * or scanf-like arguments. They are null except for versions of gcc
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| 187 | * that are known to support the features properly (old versions of gcc-2
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| 188 | * didn't permit keeping the keywords out of the application namespace).
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| 189 | */
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| 190 | #if __GNUC__ < 2 || __GNUC__ == 2 && __GNUC_MINOR__ < 7
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| 191 | #define __printflike(fmtarg, firstvararg)
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| 192 | #define __scanflike(fmtarg, firstvararg)
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| 193 | #else
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| 194 | #define __printflike(fmtarg, firstvararg) \
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| 195 | __attribute__((__format__ (__printf__, fmtarg, firstvararg)))
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| 196 | #define __scanflike(fmtarg, firstvararg) \
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| 197 | __attribute__((__format__ (__scanf__, fmtarg, firstvararg)))
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| 198 | #endif
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| 199 |
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| 200 | /* Compiler-dependent macros that rely on FreeBSD-specific extensions. */
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| 201 | #if __FreeBSD_cc_version >= 300001
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| 202 | #define __printf0like(fmtarg, firstvararg) \
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| 203 | __attribute__((__format__ (__printf0__, fmtarg, firstvararg)))
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| 204 | #else
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| 205 | #define __printf0like(fmtarg, firstvararg)
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| 206 | #endif
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| 207 |
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| 208 | #if 0 /* def __GNUC__ - bird: ELF specific, so skip everything */
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| 209 | #define __strong_reference(sym,aliassym) \
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| 210 | extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym)));
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| 211 | #ifdef __STDC__
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| 212 | #define __weak_reference(sym,alias) \
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| 213 | __asm__(".weak " #alias); \
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| 214 | __asm__(".equ " #alias ", " #sym)
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| 215 | #define __warn_references(sym,msg) \
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| 216 | __asm__(".section .gnu.warning." #sym); \
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| 217 | __asm__(".asciz \"" msg "\""); \
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| 218 | __asm__(".previous")
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| 219 | #else
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| 220 | #define __weak_reference(sym,alias) \
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| 221 | __asm__(".weak alias"); \
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| 222 | __asm__(".equ alias, sym")
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| 223 | #define __warn_references(sym,msg) \
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| 224 | __asm__(".section .gnu.warning.sym"); \
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| 225 | __asm__(".asciz \"msg\""); \
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| 226 | __asm__(".previous")
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| 227 | #endif /* __STDC__ */
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| 228 | #endif /* __GNUC__ */
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| 229 |
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| 230 | #if 0 /*def __GNUC__ - ELF specific. */
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| 231 | #define __IDSTRING(name,string) __asm__(".ident\t\"" string "\"")
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| 232 | #else
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| 233 | /*
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| 234 | * This doesn't work in header files. But it may be better than nothing.
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| 235 | * The alternative is: #define __IDSTRING(name,string) [nothing]
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| 236 | */
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| 237 | #define __IDSTRING(name,string) static const char name[] __unused = string
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| 238 | #endif
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| 239 |
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| 240 | /*
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| 241 | * Embed the rcs id of a source file in the resulting library. Note that in
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| 242 | * more recent ELF binutils, we use .ident allowing the ID to be stripped.
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| 243 | * Usage:
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| 244 | * __FBSDID("$FreeBSD: src/sys/sys/cdefs.h,v 1.69 2003/04/18 18:59:34 bde Exp $");
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| 245 | */
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| 246 | #ifndef __FBSDID
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| 247 | #if !defined(lint) && !defined(STRIP_FBSDID)
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| 248 | #define __FBSDID(s) __IDSTRING(__CONCAT(__rcsid_,__LINE__),s)
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| 249 | #else
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| 250 | #define __FBSDID(s) struct __hack
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| 251 | #endif
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| 252 | #endif
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| 253 |
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| 254 | #ifndef __RCSID
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| 255 | #ifndef NO__RCSID
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| 256 | #define __RCSID(s) __IDSTRING(__CONCAT(__rcsid_,__LINE__),s)
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| 257 | #else
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| 258 | #define __RCSID(s)
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| 259 | #endif
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| 260 | #endif
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| 261 |
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| 262 | #ifndef __RCSID_SOURCE
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| 263 | #ifndef NO__RCSID_SOURCE
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| 264 | #define __RCSID_SOURCE(s) __IDSTRING(__CONCAT(__rcsid_source_,__LINE__),s)
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| 265 | #else
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| 266 | #define __RCSID_SOURCE(s)
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| 267 | #endif
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| 268 | #endif
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| 269 |
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| 270 | #ifndef __SCCSID
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| 271 | #ifndef NO__SCCSID
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| 272 | #define __SCCSID(s) __IDSTRING(__CONCAT(__sccsid_,__LINE__),s)
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| 273 | #else
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| 274 | #define __SCCSID(s)
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| 275 | #endif
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| 276 | #endif
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| 277 |
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| 278 | #ifndef __COPYRIGHT
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| 279 | #ifndef NO__COPYRIGHT
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| 280 | #define __COPYRIGHT(s) __IDSTRING(__CONCAT(__copyright_,__LINE__),s)
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| 281 | #else
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| 282 | #define __COPYRIGHT(s)
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| 283 | #endif
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| 284 | #endif
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| 285 |
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| 286 | #ifndef __DECONST
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| 287 | #define __DECONST(type, var) ((type)(uintptr_t)(const void *)(var))
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| 288 | #endif
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| 289 |
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| 290 | #ifndef __DEVOLATILE
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| 291 | #define __DEVOLATILE(type, var) ((type)(uintptr_t)(volatile void *)(var))
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| 292 | #endif
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| 293 |
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| 294 | #ifndef __DEQUALIFY
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| 295 | #define __DEQUALIFY(type, var) ((type)(uintptr_t)(const volatile void *)(var))
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| 296 | #endif
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| 297 |
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| 298 | /*-
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| 299 | * The following definitions are an extension of the behavior originally
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| 300 | * implemented in <sys/_posix.h>, but with a different level of granularity.
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| 301 | * POSIX.1 requires that the macros we test be defined before any standard
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| 302 | * header file is included.
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| 303 | *
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| 304 | * Here's a quick run-down of the versions:
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| 305 | * defined(_POSIX_SOURCE) 1003.1-1988
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| 306 | * _POSIX_C_SOURCE == 1 1003.1-1990
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| 307 | * _POSIX_C_SOURCE == 2 1003.2-1992 C Language Binding Option
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| 308 | * _POSIX_C_SOURCE == 199309 1003.1b-1993
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| 309 | * _POSIX_C_SOURCE == 199506 1003.1c-1995, 1003.1i-1995,
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| 310 | * and the omnibus ISO/IEC 9945-1: 1996
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| 311 | * _POSIX_C_SOURCE == 200112 1003.1-2001
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| 312 | *
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| 313 | * In addition, the X/Open Portability Guide, which is now the Single UNIX
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| 314 | * Specification, defines a feature-test macro which indicates the version of
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| 315 | * that specification, and which subsumes _POSIX_C_SOURCE.
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| 316 | *
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| 317 | * Our macros begin with two underscores to avoid namespace screwage.
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| 318 | */
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| 319 |
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| 320 | /* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */
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| 321 | #if _POSIX_C_SOURCE == 1
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| 322 | #undef _POSIX_C_SOURCE /* Probably illegal, but beyond caring now. */
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| 323 | #define _POSIX_C_SOURCE 199009
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| 324 | #endif
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| 325 |
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| 326 | /* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2. */
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| 327 | #if _POSIX_C_SOURCE == 2
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| 328 | #undef _POSIX_C_SOURCE
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| 329 | #define _POSIX_C_SOURCE 199209
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| 330 | #endif
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| 331 |
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| 332 | /* Deal with various X/Open Portability Guides and Single UNIX Spec. */
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| 333 | #ifdef _XOPEN_SOURCE
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| 334 | #if _XOPEN_SOURCE - 0 >= 600
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| 335 | #define __XSI_VISIBLE 600
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| 336 | #undef _POSIX_C_SOURCE
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| 337 | #define _POSIX_C_SOURCE 200112
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| 338 | #elif _XOPEN_SOURCE - 0 >= 500
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| 339 | #define __XSI_VISIBLE 500
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| 340 | #undef _POSIX_C_SOURCE
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| 341 | #define _POSIX_C_SOURCE 199506
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| 342 | #endif
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| 343 | #endif
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| 344 |
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| 345 | /*
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| 346 | * Deal with all versions of POSIX. The ordering relative to the tests above is
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| 347 | * important.
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| 348 | */
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| 349 | #if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)
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| 350 | #define _POSIX_C_SOURCE 198808
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| 351 | #endif
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| 352 | #ifdef _POSIX_C_SOURCE
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| 353 | #if _POSIX_C_SOURCE >= 200112
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| 354 | #define __POSIX_VISIBLE 200112
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| 355 | #define __ISO_C_VISIBLE 1999
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| 356 | #elif _POSIX_C_SOURCE >= 199506
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| 357 | #define __POSIX_VISIBLE 199506
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| 358 | #define __ISO_C_VISIBLE 1990
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| 359 | #elif _POSIX_C_SOURCE >= 199309
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| 360 | #define __POSIX_VISIBLE 199309
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| 361 | #define __ISO_C_VISIBLE 1990
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| 362 | #elif _POSIX_C_SOURCE >= 199209
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| 363 | #define __POSIX_VISIBLE 199209
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| 364 | #define __ISO_C_VISIBLE 1990
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| 365 | #elif _POSIX_C_SOURCE >= 199009
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| 366 | #define __POSIX_VISIBLE 199009
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| 367 | #define __ISO_C_VISIBLE 1990
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| 368 | #else
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| 369 | #define __POSIX_VISIBLE 198808
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| 370 | #define __ISO_C_VISIBLE 0
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| 371 | #endif /* _POSIX_C_SOURCE */
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| 372 | #else
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| 373 | /*-
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| 374 | * Deal with _ANSI_SOURCE:
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| 375 | * If it is defined, and no other compilation environment is explicitly
|
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| 376 | * requested, then define our internal feature-test macros to zero. This
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| 377 | * makes no difference to the preprocessor (undefined symbols in preprocessing
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| 378 | * expressions are defined to have value zero), but makes it more convenient for
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| 379 | * a test program to print out the values.
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| 380 | *
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| 381 | * If a program mistakenly defines _ANSI_SOURCE and some other macro such as
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| 382 | * _POSIX_C_SOURCE, we will assume that it wants the broader compilation
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| 383 | * environment (and in fact we will never get here).
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| 384 | */
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| 385 | #if defined(_ANSI_SOURCE) /* Hide almost everything. */
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| 386 | #define __POSIX_VISIBLE 0
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| 387 | #define __XSI_VISIBLE 0
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| 388 | #define __BSD_VISIBLE 0
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| 389 | #define __ISO_C_VISIBLE 1990
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| 390 | #elif defined(_C99_SOURCE) /* Localism to specify strict C99 env. */
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| 391 | #define __POSIX_VISIBLE 0
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| 392 | #define __XSI_VISIBLE 0
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| 393 | #define __BSD_VISIBLE 0
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| 394 | #define __ISO_C_VISIBLE 1999
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| 395 | #else /* Default environment: show everything. */
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| 396 | #define __POSIX_VISIBLE 200112
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| 397 | #define __XSI_VISIBLE 600
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| 398 | #define __BSD_VISIBLE 1
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| 399 | #define __ISO_C_VISIBLE 1999
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| 400 | #endif
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| 401 | #endif
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| 402 |
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| 403 | /* bird: toolkit pollution */
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| 404 | #define __TCPPROTO(args) __P(args)
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| 405 | #define TCPCALL _System
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| 406 |
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| 407 | /* zap: For backward compatibility with GCC/EMX */
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| 408 | #ifndef _System
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| 409 | #define _System
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| 410 | #endif
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| 411 |
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| 412 | /* bird: include the GNU sys/cdefs.h (which fortunately have another
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| 413 | blocker, _SYS_CDEFS_H). */
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| 414 | #include <sys/gnu/cdefs.h>
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| 415 |
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| 416 | #endif /* !_SYS_CDEFS_H_ */
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