cdefs.h revision 2212
1/* 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Berkeley Software Design, Inc. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)cdefs.h 8.7 (Berkeley) 1/21/94 37 * $Id: cdefs.h,v 1.5 1994/08/21 04:41:34 paul Exp $ 38 */ 39 40#ifndef _SYS_CDEFS_H_ 41#define _SYS_CDEFS_H_ 42 43#if defined(__cplusplus) 44#define __BEGIN_DECLS extern "C" { 45#define __END_DECLS }; 46#else 47#define __BEGIN_DECLS 48#define __END_DECLS 49#endif 50 51/* 52 * The __CONCAT macro is used to concatenate parts of symbol names, e.g. 53 * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo. 54 * The __CONCAT macro is a bit tricky -- make sure you don't put spaces 55 * in between its arguments. __CONCAT can also concatenate double-quoted 56 * strings produced by the __STRING macro, but this only works with ANSI C. 57 */ 58#if defined(__STDC__) || defined(__cplusplus) 59#define __P(protos) protos /* full-blown ANSI C */ 60#define __CONCAT(x,y) x ## y 61#define __STRING(x) #x 62 63#define __const const /* define reserved names to standard */ 64#define __signed signed 65#define __volatile volatile 66#if defined(__cplusplus) 67#define __inline inline /* convert to C++ keyword */ 68#else 69#ifndef __GNUC__ 70#define __inline /* delete GCC keyword */ 71#endif /* !__GNUC__ */ 72#endif /* !__cplusplus */ 73 74#else /* !(__STDC__ || __cplusplus) */ 75#define __P(protos) () /* traditional C preprocessor */ 76#define __CONCAT(x,y) x/**/y 77#define __STRING(x) "x" 78 79#ifndef __GNUC__ 80#define __const /* delete pseudo-ANSI C keywords */ 81#define __inline 82#define __signed 83#define __volatile 84/* 85 * In non-ANSI C environments, new programs will want ANSI-only C keywords 86 * deleted from the program and old programs will want them left alone. 87 * When using a compiler other than gcc, programs using the ANSI C keywords 88 * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS. 89 * When using "gcc -traditional", we assume that this is the intent; if 90 * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone. 91 */ 92#ifndef NO_ANSI_KEYWORDS 93#define const /* delete ANSI C keywords */ 94#define inline 95#define signed 96#define volatile 97#endif 98#endif /* !__GNUC__ */ 99#endif /* !(__STDC__ || __cplusplus) */ 100 101/* 102 * GCC1 and some versions of GCC2 declare dead (non-returning) and 103 * pure (no side effects) functions using "volatile" and "const"; 104 * unfortunately, these then cause warnings under "-ansi -pedantic". 105 * GCC2.5 uses a new, peculiar __attribute__((attrs)) style. All of 106 * these work for GNU C++ (modulo a slight glitch in the C++ grammar 107 * in the distribution version of 2.5.5). 108 */ 109#if __GNUC__ < 2 110#define __dead 111#define __dead2 112#define __pure 113#define __pure2 114#define __attribute__(x) 115#endif 116#if __GNUC__ == 2 && __GNUC_MINOR__ < 5 117#define __dead __volatile 118#define __dead2 119#define __pure __const 120#define __pure2 121#endif 122#if __GNUC__ == 2 && __GNUC_MINOR__ > 5 || __GNUC__ >= 3 123#define __dead 124#define __dead2 __attribute__((noreturn)) 125#define __pure 126#define __pure2 __attribute__((const)) 127#endif 128 129#endif /* !_SYS_CDEFS_H_ */ 130