578 lines
19 KiB
C
578 lines
19 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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* 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: src/sys/sys/cdefs.h,v 1.114 2011/02/18 21:44:53 nwhitehorn Exp $
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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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* This code has been put in place to help reduce the addition of
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* compiler specific defines in FreeBSD code. It helps to aid in
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* having a compiler-agnostic source tree.
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*/
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#if defined(__GNUC__) || defined(__INTEL_COMPILER)
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#if __GNUC__ >= 3 || defined(__INTEL_COMPILER)
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#define __GNUCLIKE_ASM 3
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#define __GNUCLIKE_MATH_BUILTIN_CONSTANTS
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#else
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#define __GNUCLIKE_ASM 2
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#endif
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#define __GNUCLIKE___TYPEOF 1
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#define __GNUCLIKE___OFFSETOF 1
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#define __GNUCLIKE___SECTION 1
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#ifndef __INTEL_COMPILER
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# define __GNUCLIKE_CTOR_SECTION_HANDLING 1
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#endif
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#define __GNUCLIKE_BUILTIN_CONSTANT_P 1
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# if defined(__INTEL_COMPILER) && defined(__cplusplus) \
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&& __INTEL_COMPILER < 800
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# undef __GNUCLIKE_BUILTIN_CONSTANT_P
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# endif
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#if (__GNUC_MINOR__ > 95 || __GNUC__ >= 3) && !defined(__INTEL_COMPILER)
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# define __GNUCLIKE_BUILTIN_VARARGS 1
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# define __GNUCLIKE_BUILTIN_STDARG 1
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# define __GNUCLIKE_BUILTIN_VAALIST 1
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#endif
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#if defined(__GNUC__)
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# define __GNUC_VA_LIST_COMPATIBILITY 1
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#endif
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#ifndef __INTEL_COMPILER
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# define __GNUCLIKE_BUILTIN_NEXT_ARG 1
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# define __GNUCLIKE_MATH_BUILTIN_RELOPS
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#endif
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#define __GNUCLIKE_BUILTIN_MEMCPY 1
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/* XXX: if __GNUC__ >= 2: not tested everywhere originally, where replaced */
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#define __CC_SUPPORTS_INLINE 1
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#define __CC_SUPPORTS___INLINE 1
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#define __CC_SUPPORTS___INLINE__ 1
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#define __CC_SUPPORTS___FUNC__ 1
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#define __CC_SUPPORTS_WARNING 1
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#define __CC_SUPPORTS_VARADIC_XXX 1 /* see varargs.h */
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#define __CC_SUPPORTS_DYNAMIC_ARRAY_INIT 1
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#endif /* __GNUC__ || __INTEL_COMPILER */
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/*
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* Macro to test if we're using a specific version of gcc or later.
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*/
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#if defined(__GNUC__) && !defined(__INTEL_COMPILER)
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#define __GNUC_PREREQ__(ma, mi) \
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(__GNUC__ > (ma) || __GNUC__ == (ma) && __GNUC_MINOR__ >= (mi))
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#else
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#define __GNUC_PREREQ__(ma, mi) 0
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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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#if !(defined(__CC_SUPPORTS___INLINE))
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#define __inline /* delete GCC keyword */
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#endif /* ! __CC_SUPPORTS___INLINE */
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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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#if !defined(__CC_SUPPORTS___INLINE)
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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 /* !__CC_SUPPORTS___INLINE */
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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). If we do not provide an implementation
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* for a given compiler, let the compile fail if it is told to use
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* a feature that we cannot live without.
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*/
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#ifdef lint
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#define __dead2
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#define __pure2
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#define __unused
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#define __packed
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#define __aligned(x)
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#define __section(x)
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#else
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#if !__GNUC_PREREQ__(2, 5) && !defined(__INTEL_COMPILER)
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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 && !defined(__INTEL_COMPILER)
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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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/* XXX Find out what to do for __packed, __aligned and __section */
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#endif
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#if __GNUC_PREREQ__(2, 7)
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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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#define __used __attribute__((__used__))
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#define __packed __attribute__((__packed__))
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#define __aligned(x) __attribute__((__aligned__(x)))
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#define __section(x) __attribute__((__section__(x)))
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#endif
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#if defined(__INTEL_COMPILER)
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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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#define __used __attribute__((__used__))
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#define __packed __attribute__((__packed__))
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#define __aligned(x) __attribute__((__aligned__(x)))
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#define __section(x) __attribute__((__section__(x)))
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#endif
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#endif
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#if __GNUC_PREREQ__(2, 96)
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#define __malloc_like __attribute__((__malloc__))
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#define __pure __attribute__((__pure__))
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#else
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#define __malloc_like
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#define __pure
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#endif
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#if __GNUC_PREREQ__(3, 1) || (defined(__INTEL_COMPILER) && __INTEL_COMPILER >= 800)
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#define __always_inline __attribute__((__always_inline__))
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#else
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#define __always_inline
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#endif
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#if __GNUC_PREREQ__(3, 1)
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#define __noinline __attribute__ ((__noinline__))
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#else
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#define __noinline
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#endif
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#if __GNUC_PREREQ__(3, 3)
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#define __nonnull(x) __attribute__((__nonnull__(x)))
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#else
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#define __nonnull(x)
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#endif
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/* XXX: should use `#if __STDC_VERSION__ < 199901'. */
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#if !__GNUC_PREREQ__(2, 7) && !defined(__INTEL_COMPILER)
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#define __func__ NULL
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#endif
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#if (defined(__INTEL_COMPILER) || (defined(__GNUC__) && __GNUC__ >= 2)) && !defined(__STRICT_ANSI__) || __STDC_VERSION__ >= 199901
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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 extension to C90 to support the
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* C99-specific `restrict' type qualifier. We happen to use `__restrict' as
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* a way to define the `restrict' type qualifier without disturbing older
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* software 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 !defined(__STDC_VERSION__) || __STDC_VERSION__ < 199901 || defined(lint)
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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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* GNU C version 2.96 adds explicit branch prediction so that
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* the CPU back-end can hint the processor and also so that
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* code blocks can be reordered such that the predicted path
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* sees a more linear flow, thus improving cache behavior, etc.
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*
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* The following two macros provide us with a way to utilize this
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* compiler feature. Use __predict_true() if you expect the expression
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* to evaluate to true, and __predict_false() if you expect the
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* expression to evaluate to false.
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*
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* A few notes about usage:
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*
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* * Generally, __predict_false() error condition checks (unless
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* you have some _strong_ reason to do otherwise, in which case
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* document it), and/or __predict_true() `no-error' condition
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* checks, assuming you want to optimize for the no-error case.
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*
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* * Other than that, if you don't know the likelihood of a test
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* succeeding from empirical or other `hard' evidence, don't
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* make predictions.
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*
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* * These are meant to be used in places that are run `a lot'.
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* It is wasteful to make predictions in code that is run
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* seldomly (e.g. at subsystem initialization time) as the
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* basic block reordering that this affects can often generate
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* larger code.
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*/
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#if __GNUC_PREREQ__(2, 96)
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#define __predict_true(exp) __builtin_expect((exp), 1)
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#define __predict_false(exp) __builtin_expect((exp), 0)
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#else
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#define __predict_true(exp) (exp)
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#define __predict_false(exp) (exp)
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#endif
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#if __GNUC_PREREQ__(4, 2)
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#define __hidden __attribute__((__visibility__("hidden")))
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#define __exported __attribute__((__visibility__("default")))
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#else
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#define __hidden
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#define __exported
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#endif
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/*
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* We define this here since <stddef.h>, <sys/queue.h>, and <sys/types.h>
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* require it.
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*/
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#if __GNUC_PREREQ__(4, 1)
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#define __offsetof(type, field) __builtin_offsetof(type, field)
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#else
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#ifndef __cplusplus
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#define __offsetof(type, field) ((size_t)(&((type *)0)->field))
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#else
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#define __offsetof(type, field) \
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(__offsetof__ (reinterpret_cast <size_t> \
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(&reinterpret_cast <const volatile char &> \
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(static_cast<type *> (0)->field))))
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#endif
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#endif
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#define __rangeof(type, start, end) \
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(__offsetof(type, end) - __offsetof(type, start))
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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_PREREQ__(2, 7) && !defined(__INTEL_COMPILER)
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#define __printflike(fmtarg, firstvararg)
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#define __scanflike(fmtarg, firstvararg)
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#define __format_arg(fmtarg)
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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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#define __format_arg(fmtarg) __attribute__((__format_arg__ (fmtarg)))
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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 && defined(__GNUC__) && !defined(__INTEL_COMPILER)
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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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#if defined(__GNUC__) || defined(__INTEL_COMPILER)
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#ifndef __INTEL_COMPILER
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#define __strong_reference(sym,aliassym) \
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extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym)))
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#endif
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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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#define __sym_compat(sym,impl,verid) \
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__asm__(".symver " #impl ", " #sym "@" #verid)
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#define __sym_default(sym,impl,verid) \
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__asm__(".symver " #impl ", " #sym "@@" #verid)
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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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#define __sym_compat(sym,impl,verid) \
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__asm__(".symver impl, sym@verid")
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#define __sym_default(impl,sym,verid) \
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__asm__(".symver impl, sym@@verid")
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#endif /* __STDC__ */
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#endif /* __GNUC__ || __INTEL_COMPILER */
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#define __GLOBL1(sym) __asm__(".globl " #sym)
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#define __GLOBL(sym) __GLOBL1(sym)
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#if defined(__GNUC__) || defined(__INTEL_COMPILER)
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#define __IDSTRING(name,string) __asm__(".ident\t\"" string "\"")
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#else
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/*
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* The following definition might not work well if used in header files,
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* but it should be better than nothing. If you want a "do nothing"
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* version, then it should generate some harmless declaration, such as:
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* #define __IDSTRING(name,string) struct __hack
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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: src/sys/sys/cdefs.h,v 1.114 2011/02/18 21:44:53 nwhitehorn Exp $");
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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) struct __hack
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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) struct __hack
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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) struct __hack
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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) struct __hack
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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 granularity.
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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 == 2 1003.2-1992 C Language Binding Option
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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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* _POSIX_C_SOURCE == 200809 1003.1-2008
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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 == 1
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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 IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2. */
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#if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 2
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#undef _POSIX_C_SOURCE
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#define _POSIX_C_SOURCE 199209
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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 >= 700
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#define __XSI_VISIBLE 700
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#undef _POSIX_C_SOURCE
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#define _POSIX_C_SOURCE 200809
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#elif _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 >= 200809
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#define __POSIX_VISIBLE 200809
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#define __ISO_C_VISIBLE 1999
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#elif _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 >= 199209
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#define __POSIX_VISIBLE 199209
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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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#if defined(_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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#elif defined(_C99_SOURCE) /* Localism to specify strict C99 env. */
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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 1999
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#else /* Default environment: show everything. */
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#define __POSIX_VISIBLE 200809
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#define __XSI_VISIBLE 700
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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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