2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Berkeley Software Design, Inc.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
36 * @(#)cdefs.h 8.8 (Berkeley) 1/9/95
43 #if defined(__cplusplus)
44 #define __BEGIN_DECLS extern "C" {
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 to use if it must work in non-ANSI
55 * mode -- there must be no spaces between its arguments, and for nested
56 * __CONCAT's, all the __CONCAT's must be at the left. __CONCAT can also
57 * concatenate double-quoted strings produced by the __STRING macro, but
58 * this only works with ANSI C.
60 * __XSTRING is like __STRING, but it expands any macros in its argument
61 * first. It is only available with ANSI C.
63 #if defined(__STDC__) || defined(__cplusplus)
64 #define __P(protos) protos /* full-blown ANSI C */
65 #define __CONCAT1(x,y) x ## y
66 #define __CONCAT(x,y) __CONCAT1(x,y)
67 #define __STRING(x) #x /* stringify without expanding x */
68 #define __XSTRING(x) __STRING(x) /* expand x, then stringify */
70 #define __const const /* define reserved names to standard */
71 #define __signed signed
72 #define __volatile volatile
73 #if defined(__cplusplus)
74 #define __inline inline /* convert to C++ keyword */
77 #define __inline /* delete GCC keyword */
78 #endif /* !__GNUC__ */
79 #endif /* !__cplusplus */
81 #else /* !(__STDC__ || __cplusplus) */
82 #define __P(protos) () /* traditional C preprocessor */
83 #define __CONCAT(x,y) x/**/y
84 #define __STRING(x) "x"
87 #define __const /* delete pseudo-ANSI C keywords */
92 * In non-ANSI C environments, new programs will want ANSI-only C keywords
93 * deleted from the program and old programs will want them left alone.
94 * When using a compiler other than gcc, programs using the ANSI C keywords
95 * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS.
96 * When using "gcc -traditional", we assume that this is the intent; if
97 * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone.
99 #ifndef NO_ANSI_KEYWORDS
100 #define const /* delete ANSI C keywords */
104 #endif /* !NO_ANSI_KEYWORDS */
105 #endif /* !__GNUC__ */
106 #endif /* !(__STDC__ || __cplusplus) */
109 * Compiler-dependent macros to help declare dead (non-returning) and
110 * pure (no side effects) functions, and unused variables. They are
111 * null except for versions of gcc that are known to support the features
112 * properly (old versions of gcc-2 supported the dead and pure features
113 * in a different (wrong) way).
115 #if __GNUC__ < 2 || __GNUC__ == 2 && __GNUC_MINOR__ < 5
116 #define __attribute__(x)
121 #if __GNUC__ == 2 && __GNUC_MINOR__ >= 5 && __GNUC_MINOR__ < 7
122 #define __dead2 __attribute__((__noreturn__))
123 #define __pure2 __attribute__((__const__))
126 #if __GNUC__ == 2 && __GNUC_MINOR__ >= 7 || __GNUC__ == 3
127 #define __dead2 __attribute__((__noreturn__))
128 #define __pure2 __attribute__((__const__))
129 #define __unused __attribute__((__unused__))
132 /* XXX: should use `#if __STDC_VERSION__ < 199901'. */
133 #if !(__GNUC__ == 2 && __GNUC_MINOR__ >= 7 || __GNUC__ >= 3)
134 #define __func__ NULL
137 /* XXX: should use `#if __STDC_VERSION__ >= 199901'. */
138 #if defined(__GNUC__) && !defined(__STRICT_ANSI__)
139 #define __LONG_LONG_SUPPORTED
143 * GCC 2.95 provides `__restrict' as an extention to C90 to support the
144 * C99-specific `restrict' type qualifier. We happen to use `__restrict' as a
145 * way to define the `restrict' type qualifier without disturbing older software
146 * that is unaware of C99 keywords.
148 #if !(__GNUC__ == 2 && __GNUC_MINOR__ == 95)
149 #if __STDC_VERSION__ < 199901
152 #define __restrict restrict
157 * Compiler-dependent macros to declare that functions take printf-like
158 * or scanf-like arguments. They are null except for versions of gcc
159 * that are known to support the features properly (old versions of gcc-2
160 * didn't permit keeping the keywords out of the application namespace).
162 #if __GNUC__ < 2 || __GNUC__ == 2 && __GNUC_MINOR__ < 7
163 #define __printflike(fmtarg, firstvararg)
164 #define __scanflike(fmtarg, firstvararg)
166 #define __printflike(fmtarg, firstvararg) \
167 __attribute__((__format__ (__printf__, fmtarg, firstvararg)))
168 #define __scanflike(fmtarg, firstvararg) \
169 __attribute__((__format__ (__scanf__, fmtarg, firstvararg)))
172 /* Compiler-dependent macros that rely on FreeBSD-specific extensions. */
173 #if __FreeBSD_cc_version >= 300001
174 #define __printf0like(fmtarg, firstvararg) \
175 __attribute__((__format__ (__printf0__, fmtarg, firstvararg)))
177 #define __printf0like(fmtarg, firstvararg)
181 #define __strong_reference(sym,aliassym) \
182 extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym)));
185 #define __weak_reference(sym,alias) \
186 __asm__(".weak " #alias); \
187 __asm__(".equ " #alias ", " #sym)
188 #define __warn_references(sym,msg) \
189 __asm__(".section .gnu.warning." #sym); \
190 __asm__(".asciz \"" msg "\""); \
193 #define __weak_reference(sym,alias) \
194 __asm__(".weak alias"); \
195 __asm__(".equ alias, sym")
196 #define __warn_references(sym,msg) \
197 __asm__(".section .gnu.warning.sym"); \
198 __asm__(".asciz \"msg\""); \
200 #endif /* __STDC__ */
203 #define __weak_reference(sym,alias) \
204 __asm__(".stabs \"_" #alias "\",11,0,0,0"); \
205 __asm__(".stabs \"_" #sym "\",1,0,0,0")
206 #define __warn_references(sym,msg) \
207 __asm__(".stabs \"" msg "\",30,0,0,0"); \
208 __asm__(".stabs \"_" #sym "\",1,0,0,0")
210 #define __weak_reference(sym,alias) \
211 __asm__(".stabs \"_/**/alias\",11,0,0,0"); \
212 __asm__(".stabs \"_/**/sym\",1,0,0,0")
213 #define __warn_references(sym,msg) \
214 __asm__(".stabs msg,30,0,0,0"); \
215 __asm__(".stabs \"_/**/sym\",1,0,0,0")
216 #endif /* __STDC__ */
218 #endif /* __GNUC__ */
222 #define __IDSTRING(name,string) __asm__(".ident\t\"" string "\"")
224 #define __IDSTRING(name,string) __asm__(".data\n\t.asciz\t\"" string "\"\n\t.previous")
228 * This doesn't work in header files. But it may be better than nothing.
229 * The alternative is: #define __IDSTRING(name,string) [nothing]
231 #define __IDSTRING(name,string) static const char name[] __unused = string
235 #define __RCSID(s) __IDSTRING(__CONCAT(__rcsid_,__LINE__),s)
239 * Embed the rcs id of a source file in the resulting library. Note that in
240 * more recent ELF binutils, we use .ident allowing the ID to be stripped.
242 * __FBSDID("$FreeBSD$");
245 #if !defined(lint) && !defined(STRIP_FBSDID)
246 #define __FBSDID(s) __IDSTRING(__CONCAT(__rcsid_,__LINE__),s)
248 #define __FBSDID(s) struct __hack
252 #ifndef __RCSID_SOURCE
253 #define __RCSID_SOURCE(s) __IDSTRING(__CONCAT(__rcsid_source_,__LINE__),s)
257 #define __COPYRIGHT(s) __IDSTRING(__CONCAT(__copyright_,__LINE__),s)
261 #define __DECONST(type, var) ((type)(uintptr_t)(const void *)(var))
265 #define __DEVOLATILE(type, var) ((type)(uintptr_t)(volatile void *)(var))
269 #define __DEQUALIFY(type, var) ((type)(uintptr_t)(const volatile void *)(var))
272 #endif /* !_SYS_CDEFS_H_ */