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/* libc/sys/linux/sys/cdefs.h - Helper macros for K&R vs. ANSI C compat. */

/* Written 2000 by Werner Almesberger */

/*-

 * Copyright (c) 1991, 1993

 *	The Regents of the University of California.  All rights reserved.

 *

 * This code is derived from software contributed to Berkeley by

 * Berkeley Software Design, Inc.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 4. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *

 *	@(#)cdefs.h	8.8 (Berkeley) 1/9/95

 * $FreeBSD$

 */

#ifndef	_SYS_CDEFS_H_

#define	_SYS_CDEFS_H_

#include 

#include 

#include 

#define __PMT(args)	args

#define __DOTS    	, ...

#define __THROW

#ifdef __GNUC__

# define __ASMNAME(cname)  __XSTRING (__USER_LABEL_PREFIX__) cname

#endif

#define __ptr_t void *

#define __long_double_t  long double

#define __attribute_malloc__

#define __attribute_pure__

#define __attribute_format_strfmon__(a,b)

#define __flexarr      [0]

#ifndef __BOUNDED_POINTERS__

# define __bounded      /* nothing */

# define __unbounded    /* nothing */

# define __ptrvalue     /* nothing */

#endif

/*

 * Testing against Clang-specific extensions.

 */

#ifndef	__has_attribute

#define	__has_attribute(x)	0

#endif

#ifndef	__has_extension

#define	__has_extension		__has_feature

#endif

#ifndef	__has_feature

#define	__has_feature(x)	0

#endif

#ifndef	__has_include

#define	__has_include(x)	0

#endif

#ifndef	__has_builtin

#define	__has_builtin(x)	0

#endif

#if defined(__cplusplus)

#define	__BEGIN_DECLS	extern "C" {

#define	__END_DECLS	}

#else

#define	__BEGIN_DECLS

#define	__END_DECLS

#endif

/*

 * This code has been put in place to help reduce the addition of

 * compiler specific defines in FreeBSD code.  It helps to aid in

 * having a compiler-agnostic source tree.

 */

#if defined(__GNUC__) || defined(__INTEL_COMPILER)

#if __GNUC__ >= 3 || defined(__INTEL_COMPILER)

#define	__GNUCLIKE_ASM 3

#define	__GNUCLIKE_MATH_BUILTIN_CONSTANTS

#else

#define	__GNUCLIKE_ASM 2

#endif

#define	__GNUCLIKE___TYPEOF 1

#define	__GNUCLIKE___OFFSETOF 1

#define	__GNUCLIKE___SECTION 1

#ifndef __INTEL_COMPILER

#define	__GNUCLIKE_CTOR_SECTION_HANDLING 1

#endif

#define	__GNUCLIKE_BUILTIN_CONSTANT_P 1

#if defined(__INTEL_COMPILER) && defined(__cplusplus) && \

   __INTEL_COMPILER < 800

#undef __GNUCLIKE_BUILTIN_CONSTANT_P

#endif

#if (__GNUC_MINOR__ > 95 || __GNUC__ >= 3)

#define	__GNUCLIKE_BUILTIN_VARARGS 1

#define	__GNUCLIKE_BUILTIN_STDARG 1

#define	__GNUCLIKE_BUILTIN_VAALIST 1

#endif

#if defined(__GNUC__)

#define	__GNUC_VA_LIST_COMPATIBILITY 1

#endif

/*

 * Compiler memory barriers, specific to gcc and clang.

 */

#if defined(__GNUC__)

#define	__compiler_membar()	__asm __volatile(" " : : : "memory")

#endif

#ifndef __INTEL_COMPILER

#define	__GNUCLIKE_BUILTIN_NEXT_ARG 1

#define	__GNUCLIKE_MATH_BUILTIN_RELOPS

#endif

#define	__GNUCLIKE_BUILTIN_MEMCPY 1

/* XXX: if __GNUC__ >= 2: not tested everywhere originally, where replaced */

#define	__CC_SUPPORTS_INLINE 1

#define	__CC_SUPPORTS___INLINE 1

#define	__CC_SUPPORTS___INLINE__ 1

#define	__CC_SUPPORTS___FUNC__ 1

#define	__CC_SUPPORTS_WARNING 1

#define	__CC_SUPPORTS_VARADIC_XXX 1 /* see varargs.h */

#define	__CC_SUPPORTS_DYNAMIC_ARRAY_INIT 1

#endif /* __GNUC__ || __INTEL_COMPILER */

/*

 * The __CONCAT macro is used to concatenate parts of symbol names, e.g.

 * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.

 * The __CONCAT macro is a bit tricky to use if it must work in non-ANSI

 * mode -- there must be no spaces between its arguments, and for nested

 * __CONCAT's, all the __CONCAT's must be at the left.  __CONCAT can also

 * concatenate double-quoted strings produced by the __STRING macro, but

 * this only works with ANSI C.

 *

 * __XSTRING is like __STRING, but it expands any macros in its argument

 * first.  It is only available with ANSI C.

 */

#if defined(__STDC__) || defined(__cplusplus)

#define	__P(protos)	protos		/* full-blown ANSI C */

#define	__CONCAT1(x,y)	x ## y

#define	__CONCAT(x,y)	__CONCAT1(x,y)

#define	__STRING(x)	#x		/* stringify without expanding x */

#define	__XSTRING(x)	__STRING(x)	/* expand x, then stringify */

#define	__const		const		/* define reserved names to standard */

#define	__signed	signed

#define	__volatile	volatile

#if defined(__cplusplus)

#define	__inline	inline		/* convert to C++ keyword */

#else

#if !(defined(__CC_SUPPORTS___INLINE))

#define	__inline			/* delete GCC keyword */

#endif /* ! __CC_SUPPORTS___INLINE */

#endif /* !__cplusplus */

#else	/* !(__STDC__ || __cplusplus) */

#define	__P(protos)	()		/* traditional C preprocessor */

#define	__CONCAT(x,y)	x/**/y

#define	__STRING(x)	"x"

#if !defined(__CC_SUPPORTS___INLINE)

#define	__const				/* delete pseudo-ANSI C keywords */

#define	__inline

#define	__signed

#define	__volatile

/*

 * In non-ANSI C environments, new programs will want ANSI-only C keywords

 * deleted from the program and old programs will want them left alone.

 * When using a compiler other than gcc, programs using the ANSI C keywords

 * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS.

 * When using "gcc -traditional", we assume that this is the intent; if

 * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone.

 */

#ifndef	NO_ANSI_KEYWORDS

#define	const				/* delete ANSI C keywords */

#define	inline

#define	signed

#define	volatile

#endif	/* !NO_ANSI_KEYWORDS */

#endif	/* !__CC_SUPPORTS___INLINE */

#endif	/* !(__STDC__ || __cplusplus) */

/*

 * Compiler-dependent macros to help declare dead (non-returning) and

 * pure (no side effects) functions, and unused variables.  They are

 * null except for versions of gcc that are known to support the features

 * properly (old versions of gcc-2 supported the dead and pure features

 * in a different (wrong) way).  If we do not provide an implementation

 * for a given compiler, let the compile fail if it is told to use

 * a feature that we cannot live without.

 */

#ifdef lint

#define	__dead2

#define	__pure2

#define	__unused

#define	__packed

#define	__aligned(x)

#define	__alloc_align(x)

#define	__alloc_size(x)

#define	__section(x)

#define	__weak_symbol

#else

#define	__weak_symbol	__attribute__((__weak__))

#if !__GNUC_PREREQ__(2, 5) && !defined(__INTEL_COMPILER)

#define	__dead2

#define	__pure2

#define	__unused

#endif

#if __GNUC__ == 2 && __GNUC_MINOR__ >= 5 && __GNUC_MINOR__ < 7 && !defined(__INTEL_COMPILER)

#define	__dead2		__attribute__((__noreturn__))

#define	__pure2		__attribute__((__const__))

#define	__unused

/* XXX Find out what to do for __packed, __aligned and __section */

#endif

#if __GNUC_PREREQ__(2, 7) || defined(__INTEL_COMPILER)

#define	__dead2		__attribute__((__noreturn__))

#define	__pure2		__attribute__((__const__))

#define	__unused	__attribute__((__unused__))

#define	__used		__attribute__((__used__))

#define	__packed	__attribute__((__packed__))

#define	__aligned(x)	__attribute__((__aligned__(x)))

#define	__section(x)	__attribute__((__section__(x)))

#endif

#if __GNUC_PREREQ__(4, 3) || __has_attribute(__alloc_size__)

#define	__alloc_size(x)	__attribute__((__alloc_size__(x)))

#else

#define	__alloc_size(x)

#endif

#if __GNUC_PREREQ__(4, 9) || __has_attribute(__alloc_align__)

#define	__alloc_align(x)	__attribute__((__alloc_align__(x)))

#else

#define	__alloc_align(x)

#endif

#endif /* lint */

#if !__GNUC_PREREQ__(2, 95)

#define	__alignof(x)	__offsetof(struct { char __a; x __b; }, __b)

#endif

/*

 * Keywords added in C11.

 */

#if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 201112L || defined(lint)

#if !__has_extension(c_alignas)

#if (defined(__cplusplus) && __cplusplus >= 201103L) || \

    __has_extension(cxx_alignas)

#define	_Alignas(x)		alignas(x)

#else

/* XXX: Only emulates _Alignas(constant-expression); not _Alignas(type-name). */

#define	_Alignas(x)		__aligned(x)

#endif

#endif

#if defined(__cplusplus) && __cplusplus >= 201103L

#define	_Alignof(x)		alignof(x)

#else

#define	_Alignof(x)		__alignof(x)

#endif

#if !__has_extension(c_atomic) && !__has_extension(cxx_atomic)

/*

 * No native support for _Atomic(). Place object in structure to prevent

 * most forms of direct non-atomic access.

 */

#define	_Atomic(T)		struct { T volatile __val; }

#endif

#if defined(__cplusplus) && __cplusplus >= 201103L

#define	_Noreturn		[[noreturn]]

#else

#define	_Noreturn		__dead2

#endif

#if !__has_extension(c_static_assert)

#if (defined(__cplusplus) && __cplusplus >= 201103L) || \

    __has_extension(cxx_static_assert)

#define	_Static_assert(x, y)	static_assert(x, y)

#elif __GNUC_PREREQ__(4,6)

/* Nothing, gcc 4.6 and higher has _Static_assert built-in */

#elif defined(__COUNTER__)

#define	_Static_assert(x, y)	__Static_assert(x, __COUNTER__)

#define	__Static_assert(x, y)	___Static_assert(x, y)

#define	___Static_assert(x, y)	typedef char __assert_ ## y[(x) ? 1 : -1] \

				__unused

#else

#define	_Static_assert(x, y)	struct __hack

#endif

#endif

#if !__has_extension(c_thread_local)

/*

 * XXX: Some compilers (Clang 3.3, GCC 4.7) falsely announce C++11 mode

 * without actually supporting the thread_local keyword. Don't check for

 * the presence of C++11 when defining _Thread_local.

 */

#if /* (defined(__cplusplus) && __cplusplus >= 201103L) || */ \

    __has_extension(cxx_thread_local)

#define	_Thread_local		thread_local

#else

#define	_Thread_local		__thread

#endif

#endif

#endif /* __STDC_VERSION__ || __STDC_VERSION__ < 201112L */

/*

 * Emulation of C11 _Generic().  Unlike the previously defined C11

 * keywords, it is not possible to implement this using exactly the same

 * syntax.  Therefore implement something similar under the name

 * __generic().  Unlike _Generic(), this macro can only distinguish

 * between a single type, so it requires nested invocations to

 * distinguish multiple cases.

 */

#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) || \

    __has_extension(c_generic_selections)

#define	__generic(expr, t, yes, no)					\

	_Generic(expr, t: yes, default: no)

#elif __GNUC_PREREQ__(3, 1) && !defined(__cplusplus)

#define	__generic(expr, t, yes, no)					\

	__builtin_choose_expr(						\

	    __builtin_types_compatible_p(__typeof(expr), t), yes, no)

#endif

#if __GNUC_PREREQ__(2, 96)

#define	__malloc_like	__attribute__((__malloc__))

#define	__pure		__attribute__((__pure__))

#else

#define	__malloc_like

#define	__pure

#endif

#if __GNUC_PREREQ__(3, 1) || (defined(__INTEL_COMPILER) && __INTEL_COMPILER >= 800)

#define	__always_inline	__attribute__((__always_inline__))

#else

#define	__always_inline

#endif

#if __GNUC_PREREQ__(3, 1)

#define	__noinline	__attribute__ ((__noinline__))

#else

#define	__noinline

#endif

#if __GNUC_PREREQ__(3, 3)

#define	__nonnull(x)	__attribute__((__nonnull__(x)))

#define	__nonnull_all	__attribute__((__nonnull__))

#else

#define	__nonnull(x)

#define	__nonnull_all

#endif

#if __GNUC_PREREQ__(3, 4)

#define	__fastcall	__attribute__((__fastcall__))

#define	__result_use_check	__attribute__((__warn_unused_result__))

#else

#define	__fastcall

#define	__result_use_check

#endif

#if __GNUC_PREREQ__(4, 1)

#define	__returns_twice	__attribute__((__returns_twice__))

#else

#define	__returns_twice

#endif

#if __GNUC_PREREQ__(4, 6) || __has_builtin(__builtin_unreachable)

#define	__unreachable()	__builtin_unreachable()

#else

#define	__unreachable()	((void)0)

#endif

/* XXX: should use `#if __STDC_VERSION__ < 199901'. */

#if !__GNUC_PREREQ__(2, 7) && !defined(__INTEL_COMPILER)

#define	__func__	NULL

#endif

/*

 * GCC 2.95 provides `__restrict' as an extension to C90 to support the

 * C99-specific `restrict' type qualifier.  We happen to use `__restrict' as

 * a way to define the `restrict' type qualifier without disturbing older

 * software that is unaware of C99 keywords.

 */

#if !(__GNUC__ == 2 && __GNUC_MINOR__ == 95)

#if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 199901 || defined(lint)

#define	__restrict

#else

#define	__restrict	restrict

#endif

#endif

/*

 * GNU C version 2.96 adds explicit branch prediction so that

 * the CPU back-end can hint the processor and also so that

 * code blocks can be reordered such that the predicted path

 * sees a more linear flow, thus improving cache behavior, etc.

 *

 * The following two macros provide us with a way to utilize this

 * compiler feature.  Use __predict_true() if you expect the expression

 * to evaluate to true, and __predict_false() if you expect the

 * expression to evaluate to false.

 *

 * A few notes about usage:

 *

 *	* Generally, __predict_false() error condition checks (unless

 *	  you have some _strong_ reason to do otherwise, in which case

 *	  document it), and/or __predict_true() `no-error' condition

 *	  checks, assuming you want to optimize for the no-error case.

 *

 *	* Other than that, if you don't know the likelihood of a test

 *	  succeeding from empirical or other `hard' evidence, don't

 *	  make predictions.

 *

 *	* These are meant to be used in places that are run `a lot'.

 *	  It is wasteful to make predictions in code that is run

 *	  seldomly (e.g. at subsystem initialization time) as the

 *	  basic block reordering that this affects can often generate

 *	  larger code.

 */

#if __GNUC_PREREQ__(2, 96)

#define	__predict_true(exp)     __builtin_expect((exp), 1)

#define	__predict_false(exp)    __builtin_expect((exp), 0)

#else

#define	__predict_true(exp)     (exp)

#define	__predict_false(exp)    (exp)

#endif

#if __GNUC_PREREQ__(4, 0)

#define	__sentinel	__attribute__((__sentinel__))

#define	__exported	__attribute__((__visibility__("default")))

#define	__hidden	__attribute__((__visibility__("hidden")))

#else

#define	__sentinel

#define	__exported

#define	__hidden

#endif

#define __offsetof(type, field)	offsetof(type, field)

#define	__rangeof(type, start, end) \

	(__offsetof(type, end) - __offsetof(type, start))

/*

 * Given the pointer x to the member m of the struct s, return

 * a pointer to the containing structure.  When using GCC, we first

 * assign pointer x to a local variable, to check that its type is

 * compatible with member m.

 */

#if __GNUC_PREREQ__(3, 1)

#define	__containerof(x, s, m) ({					\

	const volatile __typeof(((s *)0)->m) *__x = (x);		\

	__DEQUALIFY(s *, (const volatile char *)__x - __offsetof(s, m));\

})

#else

#define	__containerof(x, s, m)						\

	__DEQUALIFY(s *, (const volatile char *)(x) - __offsetof(s, m))

#endif

/*

 * Compiler-dependent macros to declare that functions take printf-like

 * or scanf-like arguments.  They are null except for versions of gcc

 * that are known to support the features properly (old versions of gcc-2

 * didn't permit keeping the keywords out of the application namespace).

 */

#if !__GNUC_PREREQ__(2, 7) && !defined(__INTEL_COMPILER)

#define	__printflike(fmtarg, firstvararg)

#define	__scanflike(fmtarg, firstvararg)

#define	__format_arg(fmtarg)

#define	__strfmonlike(fmtarg, firstvararg)

#define	__strftimelike(fmtarg, firstvararg)

#else

#define	__printflike(fmtarg, firstvararg) \

	    __attribute__((__format__ (__printf__, fmtarg, firstvararg)))

#define	__scanflike(fmtarg, firstvararg) \

	    __attribute__((__format__ (__scanf__, fmtarg, firstvararg)))

#define	__format_arg(fmtarg)	__attribute__((__format_arg__ (fmtarg)))

#define	__strfmonlike(fmtarg, firstvararg) \

	    __attribute__((__format__ (__strfmon__, fmtarg, firstvararg)))

#define	__strftimelike(fmtarg, firstvararg) \

	    __attribute__((__format__ (__strftime__, fmtarg, firstvararg)))

#endif

/*

 * FORTIFY_SOURCE, and perhaps other compiler-specific features, require

 * the use of non-standard inlining.  In general we should try to avoid

 * using these but GCC-compatible compilers tend to support the extensions

 * well enough to use them in limited cases.

 */

#if defined(__GNUC_GNU_INLINE__) || defined(__GNUC_STDC_INLINE__)

#if __GNUC_PREREQ__(4, 3) || __has_attribute(__artificial__)

#define	__gnu_inline	__attribute__((__gnu_inline__, __artificial__))

#else

#define	__gnu_inline	__attribute__((__gnu_inline__))

#endif /* artificial */

#else

#define	__gnu_inline

#endif

/* Compiler-dependent macros that rely on FreeBSD-specific extensions. */

#if defined(__FreeBSD_cc_version) && __FreeBSD_cc_version >= 300001 && \

    defined(__GNUC__) && !defined(__INTEL_COMPILER)

#define	__printf0like(fmtarg, firstvararg) \

	    __attribute__((__format__ (__printf0__, fmtarg, firstvararg)))

#else

#define	__printf0like(fmtarg, firstvararg)

#endif

#if defined(__GNUC__) || defined(__INTEL_COMPILER)

#ifndef __INTEL_COMPILER

#define	__strong_reference(sym,aliassym)	\

	extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym)))

#endif

#ifdef __ELF__

#ifdef __STDC__

#define	__weak_reference(sym,alias)	\

	__asm__(".weak " #alias);	\

	__asm__(".equ "  #alias ", " #sym)

#define	__warn_references(sym,msg)	\

	__asm__(".section .gnu.warning." #sym);	\

	__asm__(".asciz \"" msg "\"");	\

	__asm__(".previous")

#define	__sym_compat(sym,impl,verid)	\

	__asm__(".symver " #impl ", " #sym "@" #verid)

#define	__sym_default(sym,impl,verid)	\

	__asm__(".symver " #impl ", " #sym "@@" #verid)

#else

#define	__weak_reference(sym,alias)	\

	__asm__(".weak alias");		\

	__asm__(".equ alias, sym")

#define	__warn_references(sym,msg)	\

	__asm__(".section .gnu.warning.sym"); \

	__asm__(".asciz \"msg\"");	\

	__asm__(".previous")

#define	__sym_compat(sym,impl,verid)	\

	__asm__(".symver impl, sym@verid")

#define	__sym_default(impl,sym,verid)	\

	__asm__(".symver impl, sym@@verid")

#endif	/* __STDC__ */

#else	/* !__ELF__ */

#ifdef __STDC__

#define	__weak_reference(sym,alias)	\

	__asm__(".stabs \"_" #alias "\",11,0,0,0");	\

	__asm__(".stabs \"_" #sym "\",1,0,0,0")

#define	__warn_references(sym,msg)	\

	__asm__(".stabs \"" msg "\",30,0,0,0");		\

	__asm__(".stabs \"_" #sym "\",1,0,0,0")

#else

#define	__weak_reference(sym,alias)	\

	__asm__(".stabs \"_/**/alias\",11,0,0,0");	\

	__asm__(".stabs \"_/**/sym\",1,0,0,0")

#define	__warn_references(sym,msg)	\

	__asm__(".stabs msg,30,0,0,0");			\

	__asm__(".stabs \"_/**/sym\",1,0,0,0")

#endif	/* __STDC__ */

#endif	/* __ELF__ */

#endif	/* __GNUC__ || __INTEL_COMPILER */

#ifndef	__FBSDID

#define	__FBSDID(s)	struct __hack

#endif

#ifndef	__RCSID

#define	__RCSID(s)	struct __hack

#endif

#ifndef	__RCSID_SOURCE

#define	__RCSID_SOURCE(s)	struct __hack

#endif

#ifndef	__SCCSID

#define	__SCCSID(s)	struct __hack

#endif

#ifndef	__COPYRIGHT

#define	__COPYRIGHT(s)	struct __hack

#endif

#ifndef	__DECONST

#define	__DECONST(type, var)	((type)(__uintptr_t)(const void *)(var))

#endif

#ifndef	__DEVOLATILE

#define	__DEVOLATILE(type, var)	((type)(__uintptr_t)(volatile void *)(var))

#endif

#ifndef	__DEQUALIFY

#define	__DEQUALIFY(type, var)	((type)(__uintptr_t)(const volatile void *)(var))

#endif

/*-

 * The following definitions are an extension of the behavior originally

 * implemented in , but with a different level of granularity.

 * POSIX.1 requires that the macros we test be defined before any standard

 * header file is included.

 *

 * Here's a quick run-down of the versions:

 *  defined(_POSIX_SOURCE)		1003.1-1988

 *  _POSIX_C_SOURCE == 1		1003.1-1990

 *  _POSIX_C_SOURCE == 2		1003.2-1992 C Language Binding Option

 *  _POSIX_C_SOURCE == 199309		1003.1b-1993

 *  _POSIX_C_SOURCE == 199506		1003.1c-1995, 1003.1i-1995,

 *					and the omnibus ISO/IEC 9945-1: 1996

 *  _POSIX_C_SOURCE == 200112		1003.1-2001

 *  _POSIX_C_SOURCE == 200809		1003.1-2008

 *

 * In addition, the X/Open Portability Guide, which is now the Single UNIX

 * Specification, defines a feature-test macro which indicates the version of

 * that specification, and which subsumes _POSIX_C_SOURCE.

 *

 * Our macros begin with two underscores to avoid namespace screwage.

 */

/* Deal with _GNU_SOURCE, which implies everything and the kitchen sink */

#ifdef _GNU_SOURCE

#undef _XOPEN_SOURCE

#define	_XOPEN_SOURCE		700

#define	__BSD_VISIBLE		1

#define	__GNU_VISIBLE		1

#endif

/* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */

#if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 1

#undef _POSIX_C_SOURCE		/* Probably illegal, but beyond caring now. */

#define	_POSIX_C_SOURCE		199009

#endif

/* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2. */

#if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 2

#undef _POSIX_C_SOURCE

#define	_POSIX_C_SOURCE		199209

#endif

/* Deal with various X/Open Portability Guides and Single UNIX Spec. */

#ifdef _XOPEN_SOURCE

#if _XOPEN_SOURCE - 0 >= 700

#define	__XSI_VISIBLE		700

#undef _POSIX_C_SOURCE

#define	_POSIX_C_SOURCE		200809

#elif _XOPEN_SOURCE - 0 >= 600

#define	__XSI_VISIBLE		600

#undef _POSIX_C_SOURCE

#define	_POSIX_C_SOURCE		200112

#elif _XOPEN_SOURCE - 0 >= 500

#define	__XSI_VISIBLE		500

#undef _POSIX_C_SOURCE

#define	_POSIX_C_SOURCE		199506

#endif

#endif

/*

 * Deal with all versions of POSIX.  The ordering relative to the tests above is

 * important.

 */

#if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)

#define	_POSIX_C_SOURCE		198808

#endif

#ifdef _POSIX_C_SOURCE

#if _POSIX_C_SOURCE >= 200809

#define	__POSIX_VISIBLE		200809

#define	__ISO_C_VISIBLE		1999

#elif _POSIX_C_SOURCE >= 200112

#define	__POSIX_VISIBLE		200112

#define	__ISO_C_VISIBLE		1999

#elif _POSIX_C_SOURCE >= 199506

#define	__POSIX_VISIBLE		199506

#define	__ISO_C_VISIBLE		1990

#elif _POSIX_C_SOURCE >= 199309

#define	__POSIX_VISIBLE		199309

#define	__ISO_C_VISIBLE		1990

#elif _POSIX_C_SOURCE >= 199209

#define	__POSIX_VISIBLE		199209

#define	__ISO_C_VISIBLE		1990

#elif _POSIX_C_SOURCE >= 199009

#define	__POSIX_VISIBLE		199009

#define	__ISO_C_VISIBLE		1990

#else

#define	__POSIX_VISIBLE		198808

#define	__ISO_C_VISIBLE		0

#endif /* _POSIX_C_SOURCE */

#else

/*-

 * Deal with _ANSI_SOURCE:

 * If it is defined, and no other compilation environment is explicitly

 * requested, then define our internal feature-test macros to zero.  This

 * makes no difference to the preprocessor (undefined symbols in preprocessing

 * expressions are defined to have value zero), but makes it more convenient for

 * a test program to print out the values.

 *

 * If a program mistakenly defines _ANSI_SOURCE and some other macro such as

 * _POSIX_C_SOURCE, we will assume that it wants the broader compilation

 * environment (and in fact we will never get here).

 */

#if defined(_ANSI_SOURCE)	/* Hide almost everything. */

#define	__POSIX_VISIBLE		0

#define	__XSI_VISIBLE		0

#define	__BSD_VISIBLE		0

#define	__ISO_C_VISIBLE		1990

#elif defined(_C99_SOURCE)	/* Localism to specify strict C99 env. */

#define	__POSIX_VISIBLE		0

#define	__XSI_VISIBLE		0

#define	__BSD_VISIBLE		0

#define	__ISO_C_VISIBLE		1999

#elif defined(_C11_SOURCE)	/* Localism to specify strict C11 env. */

#define	__POSIX_VISIBLE		0

#define	__XSI_VISIBLE		0

#define	__BSD_VISIBLE		0

#define	__ISO_C_VISIBLE		2011

#else				/* Default: everything except __GNU_VISIBLE. */

#define	__POSIX_VISIBLE		200809

#define	__XSI_VISIBLE		700

#define	__BSD_VISIBLE		1

#define	__ISO_C_VISIBLE		2011

#endif

#endif

/*

 * Type Safety Checking

 *

 * Clang provides additional attributes to enable checking type safety

 * properties that cannot be enforced by the C type system.

 */

#if __has_attribute(__argument_with_type_tag__) && \

    __has_attribute(__type_tag_for_datatype__) && !defined(lint)

#define	__arg_type_tag(arg_kind, arg_idx, type_tag_idx) \

	    __attribute__((__argument_with_type_tag__(arg_kind, arg_idx, type_tag_idx)))

#define	__datatype_type_tag(kind, type) \

	    __attribute__((__type_tag_for_datatype__(kind, type)))

#else

#define	__arg_type_tag(arg_kind, arg_idx, type_tag_idx)

#define	__datatype_type_tag(kind, type)

#endif

/*

 * Lock annotations.

 *

 * Clang provides support for doing basic thread-safety tests at

 * compile-time, by marking which locks will/should be held when

 * entering/leaving a functions.

 *

 * Furthermore, it is also possible to annotate variables and structure

 * members to enforce that they are only accessed when certain locks are

 * held.

 */

#if __has_extension(c_thread_safety_attributes)

#define	__lock_annotate(x)	__attribute__((x))

#else

#define	__lock_annotate(x)

#endif

/* Structure implements a lock. */

#define	__lockable		__lock_annotate(lockable)

/* Function acquires an exclusive or shared lock. */

#define	__locks_exclusive(...) \

	__lock_annotate(exclusive_lock_function(__VA_ARGS__))

#define	__locks_shared(...) \

	__lock_annotate(shared_lock_function(__VA_ARGS__))

/* Function attempts to acquire an exclusive or shared lock. */

#define	__trylocks_exclusive(...) \

	__lock_annotate(exclusive_trylock_function(__VA_ARGS__))

#define	__trylocks_shared(...) \

	__lock_annotate(shared_trylock_function(__VA_ARGS__))

/* Function releases a lock. */

#define	__unlocks(...)		__lock_annotate(unlock_function(__VA_ARGS__))

/* Function asserts that an exclusive or shared lock is held. */

#define	__asserts_exclusive(...) \

	__lock_annotate(assert_exclusive_lock(__VA_ARGS__))

#define	__asserts_shared(...) \

	__lock_annotate(assert_shared_lock(__VA_ARGS__))

/* Function requires that an exclusive or shared lock is or is not held. */

#define	__requires_exclusive(...) \

	__lock_annotate(exclusive_locks_required(__VA_ARGS__))

#define	__requires_shared(...) \

	__lock_annotate(shared_locks_required(__VA_ARGS__))

#define	__requires_unlocked(...) \

	__lock_annotate(locks_excluded(__VA_ARGS__))

/* Function should not be analyzed. */

#define	__no_lock_analysis	__lock_annotate(no_thread_safety_analysis)

/* Guard variables and structure members by lock. */

#define	__guarded_by(x)		__lock_annotate(guarded_by(x))

#define	__pt_guarded_by(x)	__lock_annotate(pt_guarded_by(x))

#endif /* !_SYS_CDEFS_H_ */