Annotation of src/sys/sys/cdefs.h, Revision 1.7
1.1 cgd 1: /*
2: * Copyright (c) 1991 The Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. All advertising materials mentioning features or use of this software
14: * must display the following acknowledgement:
15: * This product includes software developed by the University of
16: * California, Berkeley and its contributors.
17: * 4. Neither the name of the University nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31: * SUCH DAMAGE.
32: *
1.3 cgd 33: * from: @(#)cdefs.h 7.6 (Berkeley) 5/4/91
1.7 ! cgd 34: * $Id: cdefs.h,v 1.6 1993/12/03 20:39:35 jtc Exp $
1.1 cgd 35: */
36:
1.2 mycroft 37: #ifndef _SYS_CDEFS_H_
38: #define _SYS_CDEFS_H_
1.1 cgd 39:
40: #if defined(__cplusplus)
41: #define __BEGIN_DECLS extern "C" {
42: #define __END_DECLS };
43: #else
44: #define __BEGIN_DECLS
45: #define __END_DECLS
46: #endif
47:
48: /*
49: * The __CONCAT macro is used to concatenate parts of symbol names, e.g.
50: * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
51: * The __CONCAT macro is a bit tricky -- make sure you don't put spaces
52: * in between its arguments. __CONCAT can also concatenate double-quoted
53: * strings produced by the __STRING macro, but this only works with ANSI C.
54: */
1.5 cgd 55:
56: #ifdef __P /* get rid of previous definition of __P */
57: #undef __P
58: #endif
59:
1.1 cgd 60: #if defined(__STDC__) || defined(__cplusplus)
61: #define __P(protos) protos /* full-blown ANSI C */
62: #define __CONCAT(x,y) x ## y
63: #define __STRING(x) #x
64:
65: #else /* !(__STDC__ || __cplusplus) */
66: #define __P(protos) () /* traditional C preprocessor */
67: #define __CONCAT(x,y) x/**/y
68: #define __STRING(x) "x"
69:
70: #ifdef __GNUC__
71: #define const __const /* GCC: ANSI C with -traditional */
72: #define inline __inline
73: #define signed __signed
74: #define volatile __volatile
75:
76: #else /* !__GNUC__ */
77: #define const /* delete ANSI C keywords */
78: #define inline
79: #define signed
80: #define volatile
81: #endif /* !__GNUC__ */
82: #endif /* !(__STDC__ || __cplusplus) */
1.6 jtc 83:
84:
85: /*
1.7 ! cgd 86: * Disable GCC's __atrribute__ extension when we're not using GCC, or
! 87: * when using gcc -traditional.
1.6 jtc 88: */
1.7 ! cgd 89: #if !defined(__GNUC__) || !defined(__STDC__)
1.6 jtc 90: #define __attribute__(x)
91: #endif
92:
1.4 cgd 93:
94: /*
95: * GCC has extensions for declaring functions as `pure' (always returns
96: * the same value given the same inputs, i.e., has no external state and
97: * no side effects) and `dead' (nonreturning). These mainly affect
98: * optimization and warnings. Unfortunately, GCC complains if these are
99: * used under strict ANSI mode (`gcc -ansi -pedantic'), hence we need to
100: * define them only if compiling without this.
101: */
102: #if defined(__GNUC__) && !defined(__STRICT_ANSI__)
103: #define __dead __volatile
104: #define __pure __const
105: #else
106: #define __dead
107: #define __pure
108: #endif
1.1 cgd 109:
1.2 mycroft 110: #endif /* !_SYS_CDEFS_H_ */
CVSweb <webmaster@jp.NetBSD.org>