382 lines
12 KiB
C
382 lines
12 KiB
C
/*
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Berkeley Software Design, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)cdefs.h 8.8 (Berkeley) 1/9/95
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* $FreeBSD$
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*/
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#ifndef _SYS_CDEFS_H_
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#define _SYS_CDEFS_H_
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#if defined(__cplusplus)
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#define __BEGIN_DECLS extern "C" {
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#define __END_DECLS }
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#else
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#define __BEGIN_DECLS
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#define __END_DECLS
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#endif
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/*
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* The __CONCAT macro is used to concatenate parts of symbol names, e.g.
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* with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
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* The __CONCAT macro is a bit tricky to use if it must work in non-ANSI
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* mode -- there must be no spaces between its arguments, and for nested
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* __CONCAT's, all the __CONCAT's must be at the left. __CONCAT can also
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* concatenate double-quoted strings produced by the __STRING macro, but
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* this only works with ANSI C.
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*
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* __XSTRING is like __STRING, but it expands any macros in its argument
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* first. It is only available with ANSI C.
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*/
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#if defined(__STDC__) || defined(__cplusplus)
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#define __P(protos) protos /* full-blown ANSI C */
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#define __CONCAT1(x,y) x ## y
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#define __CONCAT(x,y) __CONCAT1(x,y)
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#define __STRING(x) #x /* stringify without expanding x */
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#define __XSTRING(x) __STRING(x) /* expand x, then stringify */
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#define __const const /* define reserved names to standard */
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#define __signed signed
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#define __volatile volatile
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#if defined(__cplusplus)
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#define __inline inline /* convert to C++ keyword */
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#else
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#ifndef __GNUC__
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#define __inline /* delete GCC keyword */
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#endif /* !__GNUC__ */
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#endif /* !__cplusplus */
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#else /* !(__STDC__ || __cplusplus) */
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#define __P(protos) () /* traditional C preprocessor */
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#define __CONCAT(x,y) x/**/y
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#define __STRING(x) "x"
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#ifndef __GNUC__
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#define __const /* delete pseudo-ANSI C keywords */
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#define __inline
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#define __signed
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#define __volatile
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/*
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* In non-ANSI C environments, new programs will want ANSI-only C keywords
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* deleted from the program and old programs will want them left alone.
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* When using a compiler other than gcc, programs using the ANSI C keywords
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* const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS.
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* When using "gcc -traditional", we assume that this is the intent; if
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* __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone.
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*/
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#ifndef NO_ANSI_KEYWORDS
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#define const /* delete ANSI C keywords */
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#define inline
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#define signed
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#define volatile
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#endif /* !NO_ANSI_KEYWORDS */
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#endif /* !__GNUC__ */
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#endif /* !(__STDC__ || __cplusplus) */
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/*
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* Compiler-dependent macros to help declare dead (non-returning) and
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* pure (no side effects) functions, and unused variables. They are
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* null except for versions of gcc that are known to support the features
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* properly (old versions of gcc-2 supported the dead and pure features
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* in a different (wrong) way).
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*/
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#if __GNUC__ < 2 || __GNUC__ == 2 && __GNUC_MINOR__ < 5
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#define __dead2
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#define __pure2
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#define __unused
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#endif
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#if __GNUC__ == 2 && __GNUC_MINOR__ >= 5 && __GNUC_MINOR__ < 7
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#define __dead2 __attribute__((__noreturn__))
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#define __pure2 __attribute__((__const__))
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#define __unused
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#endif
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#if __GNUC__ == 2 && __GNUC_MINOR__ >= 7 || __GNUC__ == 3
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#define __dead2 __attribute__((__noreturn__))
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#define __pure2 __attribute__((__const__))
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#define __unused __attribute__((__unused__))
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#endif
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/* XXX: should use `#if __STDC_VERSION__ < 199901'. */
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#if !(__GNUC__ == 2 && __GNUC_MINOR__ >= 7 || __GNUC__ >= 3)
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#define __func__ NULL
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#endif
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/* XXX: should use `#if __STDC_VERSION__ >= 199901'. */
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#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
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#define __LONG_LONG_SUPPORTED
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#endif
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/*
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* GCC 2.95 provides `__restrict' as an extention to C90 to support the
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* C99-specific `restrict' type qualifier. We happen to use `__restrict' as a
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* way to define the `restrict' type qualifier without disturbing older software
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* that is unaware of C99 keywords.
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*/
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#if !(__GNUC__ == 2 && __GNUC_MINOR__ == 95)
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#if __STDC_VERSION__ < 199901
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#define __restrict
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#else
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#define __restrict restrict
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#endif
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#endif
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/*
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* Compiler-dependent macros to declare that functions take printf-like
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* or scanf-like arguments. They are null except for versions of gcc
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* that are known to support the features properly (old versions of gcc-2
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* didn't permit keeping the keywords out of the application namespace).
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*/
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#if __GNUC__ < 2 || __GNUC__ == 2 && __GNUC_MINOR__ < 7
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#define __printflike(fmtarg, firstvararg)
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#define __scanflike(fmtarg, firstvararg)
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#else
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#define __printflike(fmtarg, firstvararg) \
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__attribute__((__format__ (__printf__, fmtarg, firstvararg)))
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#define __scanflike(fmtarg, firstvararg) \
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__attribute__((__format__ (__scanf__, fmtarg, firstvararg)))
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#endif
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/* Compiler-dependent macros that rely on FreeBSD-specific extensions. */
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#if __FreeBSD_cc_version >= 300001
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#define __printf0like(fmtarg, firstvararg) \
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__attribute__((__format__ (__printf0__, fmtarg, firstvararg)))
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#else
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#define __printf0like(fmtarg, firstvararg)
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#endif
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#ifdef __GNUC__
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#define __strong_reference(sym,aliassym) \
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extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym)));
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#ifdef __ELF__
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#ifdef __STDC__
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#define __weak_reference(sym,alias) \
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__asm__(".weak " #alias); \
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__asm__(".equ " #alias ", " #sym)
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#define __warn_references(sym,msg) \
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__asm__(".section .gnu.warning." #sym); \
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__asm__(".asciz \"" msg "\""); \
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__asm__(".previous")
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#else
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#define __weak_reference(sym,alias) \
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__asm__(".weak alias"); \
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__asm__(".equ alias, sym")
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#define __warn_references(sym,msg) \
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__asm__(".section .gnu.warning.sym"); \
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__asm__(".asciz \"msg\""); \
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__asm__(".previous")
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#endif /* __STDC__ */
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#else /* !__ELF__ */
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#ifdef __STDC__
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#define __weak_reference(sym,alias) \
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__asm__(".stabs \"_" #alias "\",11,0,0,0"); \
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__asm__(".stabs \"_" #sym "\",1,0,0,0")
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#define __warn_references(sym,msg) \
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__asm__(".stabs \"" msg "\",30,0,0,0"); \
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__asm__(".stabs \"_" #sym "\",1,0,0,0")
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#else
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#define __weak_reference(sym,alias) \
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__asm__(".stabs \"_/**/alias\",11,0,0,0"); \
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__asm__(".stabs \"_/**/sym\",1,0,0,0")
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#define __warn_references(sym,msg) \
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__asm__(".stabs msg,30,0,0,0"); \
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__asm__(".stabs \"_/**/sym\",1,0,0,0")
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#endif /* __STDC__ */
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#endif /* __ELF__ */
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#endif /* __GNUC__ */
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#ifdef __GNUC__
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#ifdef __ELF__
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#define __IDSTRING(name,string) __asm__(".ident\t\"" string "\"")
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#else
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#define __IDSTRING(name,string) __asm__(".data\n\t.asciz\t\"" string "\"\n\t.previous")
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#endif
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#else
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/*
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* This doesn't work in header files. But it may be better than nothing.
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* The alternative is: #define __IDSTRING(name,string) [nothing]
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*/
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#define __IDSTRING(name,string) static const char name[] __unused = string
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#endif
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/*
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* Embed the rcs id of a source file in the resulting library. Note that in
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* more recent ELF binutils, we use .ident allowing the ID to be stripped.
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* Usage:
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* __FBSDID("$FreeBSD$");
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*/
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#ifndef __FBSDID
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#if !defined(lint) && !defined(STRIP_FBSDID)
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#define __FBSDID(s) __IDSTRING(__CONCAT(__rcsid_,__LINE__),s)
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#else
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#define __FBSDID(s) struct __hack
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#endif
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#endif
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#ifndef __RCSID
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#ifndef NO__RCSID
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#define __RCSID(s) __IDSTRING(__CONCAT(__rcsid_,__LINE__),s)
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#else
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#define __RCSID(s)
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#endif
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#endif
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#ifndef __RCSID_SOURCE
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#ifndef NO__RCSID_SOURCE
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#define __RCSID_SOURCE(s) __IDSTRING(__CONCAT(__rcsid_source_,__LINE__),s)
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#else
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#define __RCSID_SOURCE(s)
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#endif
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#endif
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#ifndef __SCCSID
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#ifndef NO__SCCSID
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#define __SCCSID(s) __IDSTRING(__CONCAT(__sccsid_,__LINE__),s)
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#else
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#define __SCCSID(s)
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#endif
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#endif
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#ifndef __COPYRIGHT
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#ifndef NO__COPYRIGHT
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#define __COPYRIGHT(s) __IDSTRING(__CONCAT(__copyright_,__LINE__),s)
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#else
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#define __COPYRIGHT(s)
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#endif
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#endif
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#ifndef __DECONST
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#define __DECONST(type, var) ((type)(uintptr_t)(const void *)(var))
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#endif
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#ifndef __DEVOLATILE
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#define __DEVOLATILE(type, var) ((type)(uintptr_t)(volatile void *)(var))
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#endif
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#ifndef __DEQUALIFY
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#define __DEQUALIFY(type, var) ((type)(uintptr_t)(const volatile void *)(var))
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#endif
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/*-
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* The following definitions are an extension of the behavior originally
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* implemented in <sys/_posix.h>, but with a different level of grandularity.
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* POSIX.1 requires that the macros we test be defined before any standard
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* header file is included.
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*
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* Here's a quick run-down of the versions:
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* defined(_POSIX_SOURCE) 1003.1-1988
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* _POSIX_C_SOURCE == 1 1003.1-1990
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* _POSIX_C_SOURCE == 199309 1003.1b-1993
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* _POSIX_C_SOURCE == 199506 1003.1c-1995, 1003.1i-1995,
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* and the omnibus ISO/IEC 9945-1: 1996
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* _POSIX_C_SOURCE == 200112 1003.1-2001
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*
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* In addition, the X/Open Portability Guide, which is now the Single UNIX
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* Specification, defines a feature-test macro which indicates the version of
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* that specification, and which subsumes _POSIX_C_SOURCE.
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*
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* Our macros begin with two underscores to avoid namespace screwage.
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*/
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/* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */
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#if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE < 199309
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#undef _POSIX_C_SOURCE /* Probably illegal, but beyond caring now. */
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#define _POSIX_C_SOURCE 199009
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#endif
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/* Deal with various X/Open Portability Guides and Single UNIX Spec. */
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#ifdef _XOPEN_SOURCE
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#if _XOPEN_SOURCE - 0 >= 600
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#define __XSI_VISIBLE 600
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#undef _POSIX_C_SOURCE
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#define _POSIX_C_SOURCE 200112
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#elif _XOPEN_SOURCE - 0 >= 500
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#define __XSI_VISIBLE 500
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#undef _POSIX_C_SOURCE
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#define _POSIX_C_SOURCE 199506
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#endif
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#endif
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/*
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* Deal with all versions of POSIX. The ordering relative to the tests above is
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* important.
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*/
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#if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)
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#define _POSIX_C_SOURCE 198808
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#endif
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#ifdef _POSIX_C_SOURCE
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#if _POSIX_C_SOURCE >= 200112
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#define __POSIX_VISIBLE 200112
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#define __ISO_C_VISIBLE 1999
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#elif _POSIX_C_SOURCE >= 199506
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#define __POSIX_VISIBLE 199506
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#define __ISO_C_VISIBLE 1990
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#elif _POSIX_C_SOURCE >= 199309
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#define __POSIX_VISIBLE 199309
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#define __ISO_C_VISIBLE 1990
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#elif _POSIX_C_SOURCE >= 199009
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#define __POSIX_VISIBLE 199009
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#define __ISO_C_VISIBLE 1990
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#else
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#define __POSIX_VISIBLE 198808
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#define __ISO_C_VISIBLE 0
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#endif /* _POSIX_C_SOURCE */
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#else
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/*-
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* Deal with _ANSI_SOURCE:
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* If it is defined, and no other compilation environment is explicitly
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* requested, then define our internal feature-test macros to zero. This
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* makes no difference to the preprocessor (undefined symbols in preprocessing
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* expressions are defined to have value zero), but makes it more convenient for
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* a test program to print out the values.
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*
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* If a program mistakenly defines _ANSI_SOURCE and some other macro such as
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* _POSIX_C_SOURCE, we will assume that it wants the broader compilation
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* environment (and in fact we will never get here).
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*/
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#ifdef _ANSI_SOURCE /* Hide almost everything. */
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#define __POSIX_VISIBLE 0
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#define __XSI_VISIBLE 0
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#define __BSD_VISIBLE 0
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#define __ISO_C_VISIBLE 1990
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#else /* Default environment: show everything. */
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#define __POSIX_VISIBLE 200112
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#define __XSI_VISIBLE 600
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#define __BSD_VISIBLE 1
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#define __ISO_C_VISIBLE 1999
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#endif
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#endif
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#endif /* !_SYS_CDEFS_H_ */
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