 @@ -1,717 +1,717 @@
-/*	$NetBSD: cdefs.h,v 1.153 2020/04/17 14:59:23 joerg Exp $	*/
+/*	$NetBSD: cdefs.h,v 1.154 2020/04/22 09:23:21 rin Exp $	*/
 /* * 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.
  * 3. 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
  */
 #ifndef	_SYS_CDEFS_H_
 #define	_SYS_CDEFS_H_
 #ifdef _KERNEL_OPT
 #include "opt_diagnostic.h"
 #endif
 /*
  * Macro to test if we're using a GNU C compiler of a specific vintage
  * or later, for e.g. features that appeared in a particular version
  * of GNU C.  Usage:
+ *
  *	#if __GNUC_PREREQ__(major, minor)
  *	...cool feature...
  *	#else
  *	...delete feature...
  *	#endif
  */
 #ifdef __GNUC__
 #define	__GNUC_PREREQ__(x, y)						\
 	((__GNUC__ == (x) && __GNUC_MINOR__ >= (y)) ||			\
 	 (__GNUC__ > (x)))
 #else
 #define	__GNUC_PREREQ__(x, y)	0
 #endif
 /*
  * Macros to test Clang/LLVM features.
  * Usage:
+ *
  *	#if __has_feature(safe_stack)
  *	...SafeStack specific code...
  *	#else
  *	..regular code...
  *	#endif
  */
 #ifndef __has_feature
 #define __has_feature(x)	0
 #endif
 #ifndef __has_extension
 #define __has_extension		__has_feature /* Compat with pre-3.0 Clang */
 #endif
 #include <machine/cdefs.h>
 #ifdef __ELF__
 #include <sys/cdefs_elf.h>
 #else
 #include <sys/cdefs_aout.h>
 #endif
 #ifdef __GNUC__
 #define	__strict_weak_alias(alias,sym)					\
 	__unused static __typeof__(alias) *__weak_alias_##alias = &sym;	\
 	__weak_alias(alias,sym)
 #else
 #define	__strict_weak_alias(alias,sym) __weak_alias(alias,sym)
 #endif
 /*
  * Optional marker for size-optimised MD calling convention.
  */
 #ifndef __compactcall
 #define	__compactcall
 #endif
 /*
  * 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 -- make sure you don't put spaces
  * in between its arguments.  __CONCAT can also concatenate double-quoted
  * strings produced by the __STRING macro, but this only works with ANSI C.
  */
 #define	___STRING(x)	__STRING(x)
 #define	___CONCAT(x,y)	__CONCAT(x,y)
 #if __STDC__ || defined(__cplusplus)
 #define	__P(protos)	protos		/* full-blown ANSI C */
 #define	__CONCAT(x,y)	x ## y
 #define	__STRING(x)	#x
 #define	__const		const		/* define reserved names to standard */
 #define	__signed	signed
 #define	__volatile	volatile
 #if defined(__cplusplus) || defined(__PCC__)
 #define	__inline	inline		/* convert to C++/C99 keyword */
 #else
 #if !defined(__GNUC__) && !defined(__lint__)
 #define	__inline			/* delete GCC keyword */
 #endif /* !__GNUC__  && !__lint__ */
 #endif /* !__cplusplus */
 #else	/* !(__STDC__ || __cplusplus) */
 #define	__P(protos)	()		/* traditional C preprocessor */
 #define	__CONCAT(x,y)	x/**/y
 #define	__STRING(x)	"x"
 #ifndef __GNUC__
 #define	__const				/* delete pseudo-ANSI C keywords */
 #define	__inline
 #define	__signed
 #define	__volatile
 #endif	/* !__GNUC__ */
 /*
  * 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.
  * Programs using the ANSI C keywords const, inline etc. as normal
  * identifiers should define -DNO_ANSI_KEYWORDS.
  */
 #ifndef	NO_ANSI_KEYWORDS
 #define	const		__const		/* convert ANSI C keywords */
 #define	inline		__inline
 #define	signed		__signed
 #define	volatile	__volatile
 #endif /* !NO_ANSI_KEYWORDS */
 #endif	/* !(__STDC__ || __cplusplus) */
 /*
  * Used for internal auditing of the NetBSD source tree.
  */
 #ifdef __AUDIT__
 #define	__aconst	__const
 #else
 #define	__aconst
 #endif
 /*
  * Compile Time Assertion.
  */
 #ifdef __COUNTER__
 #define	__CTASSERT(x)		__CTASSERT0(x, __ctassert, __COUNTER__)
 #else
 #define	__CTASSERT(x)		__CTASSERT99(x, __INCLUDE_LEVEL__, __LINE__)
 #define	__CTASSERT99(x, a, b)	__CTASSERT0(x, __CONCAT(__ctassert,a), \
 					       __CONCAT(_,b))
 #endif
 #define	__CTASSERT0(x, y, z)	__CTASSERT1(x, y, z)
 #define	__CTASSERT1(x, y, z)	\
 	struct y ## z ## _struct { \
 		unsigned int y ## z : /*CONSTCOND*/(x) ? 1 : -1; \
+	}
 /*
  * The following macro is used to remove const cast-away warnings
  * from gcc -Wcast-qual; it should be used with caution because it
  * can hide valid errors; in particular most valid uses are in
  * situations where the API requires it, not to cast away string
  * constants. We don't use *intptr_t on purpose here and we are
  * explicit about unsigned long so that we don't have additional
  * dependencies.
  */
 #define __UNCONST(a)	((void *)(unsigned long)(const void *)(a))
 /*
  * The following macro is used to remove the volatile cast-away warnings
  * from gcc -Wcast-qual; as above it should be used with caution
  * because it can hide valid errors or warnings.  Valid uses include
  * making it possible to pass a volatile pointer to memset().
  * For the same reasons as above, we use unsigned long and not intptr_t.
  */
 #define __UNVOLATILE(a)	((void *)(unsigned long)(volatile void *)(a))
 /*
  * The following macro is used to remove the the function type cast warnings
  * from gcc -Wcast-function-type and as above should be used with caution.
  */
 #define __FPTRCAST(t, f)	((t)(void *)(f))
 /*
  * GCC2 provides __extension__ to suppress warnings for various GNU C
  * language extensions under "-ansi -pedantic".
  */
 #if !__GNUC_PREREQ__(2, 0)
 #define	__extension__		/* delete __extension__ if non-gcc or gcc1 */
 #endif
 /*
  * GCC1 and some versions of GCC2 declare dead (non-returning) and
  * pure (no side effects) functions using "volatile" and "const";
  * unfortunately, these then cause warnings under "-ansi -pedantic".
  * GCC2 uses a new, peculiar __attribute__((attrs)) style.  All of
  * these work for GNU C++ (modulo a slight glitch in the C++ grammar
  * in the distribution version of 2.5.5).
+ *
  * GCC defines a pure function as depending only on its arguments and
  * global variables.  Typical examples are strlen and sqrt.
+ *
  * GCC defines a const function as depending only on its arguments.
  * Therefore calling a const function again with identical arguments
  * will always produce the same result.
+ *
  * Rounding modes for floating point operations are considered global
  * variables and prevent sqrt from being a const function.
+ *
  * Calls to const functions can be optimised away and moved around
  * without limitations.
  */
 #if !__GNUC_PREREQ__(2, 0) && !defined(__lint__)
 #define __attribute__(x)
 #endif
 #if __GNUC_PREREQ__(2, 5) || defined(__lint__)
 #define	__dead		__attribute__((__noreturn__))
 #elif defined(__GNUC__)
 #define	__dead		__volatile
 #else
 #define	__dead
 #endif
 #if __GNUC_PREREQ__(2, 96) || defined(__lint__)
 #define	__pure		__attribute__((__pure__))
 #elif defined(__GNUC__)
 #define	__pure		__const
 #else
 #define	__pure
 #endif
 #if __GNUC_PREREQ__(2, 5) || defined(__lint__)
 #define	__constfunc	__attribute__((__const__))
 #else
 #define	__constfunc
 #endif
 #if __GNUC_PREREQ__(3, 0) || defined(__lint__)
 #define	__noinline	__attribute__((__noinline__))
 #else
 #define	__noinline	/* nothing */
 #endif
 #if __GNUC_PREREQ__(3, 0) || defined(__lint__)
 #define	__always_inline	__attribute__((__always_inline__))
 #else
 #define	__always_inline	/* nothing */
 #endif
 #if __GNUC_PREREQ__(4, 1) || defined(__lint__)
 #define	__returns_twice	__attribute__((__returns_twice__))
 #else
 #define	__returns_twice	/* nothing */
 #endif
 #if __GNUC_PREREQ__(4, 5) || defined(__lint__)
 #define	__noclone	__attribute__((__noclone__))
 #else
 #define	__noclone	/* nothing */
 #endif
 /*
  * __unused: Note that item or function might be unused.
  */
 #if __GNUC_PREREQ__(2, 7) || defined(__lint__)
 #define	__unused	__attribute__((__unused__))
 #else
 #define	__unused	/* delete */
 #endif
 /*
  * __used: Note that item is needed, even if it appears to be unused.
  */
 #if __GNUC_PREREQ__(3, 1) || defined(__lint__)
 #define	__used		__attribute__((__used__))
 #else
 #define	__used		__unused
 #endif
 /*
  * __diagused: Note that item is used in diagnostic code, but may be
  * unused in non-diagnostic code.
  */
 #if (defined(_KERNEL) && defined(DIAGNOSTIC)) \
  || (!defined(_KERNEL) && !defined(NDEBUG))
 #define	__diagused	/* empty */
 #else
 #define	__diagused	__unused
 #endif
 /*
  * __debugused: Note that item is used in debug code, but may be
  * unused in non-debug code.
  */
 #if defined(DEBUG)
 #define	__debugused	/* empty */
 #else
 #define	__debugused	__unused
 #endif
 #if __GNUC_PREREQ__(3, 1) || defined(__lint__)
 #define	__noprofile	__attribute__((__no_instrument_function__))
 #else
 #define	__noprofile	/* nothing */
 #endif
 #if __GNUC_PREREQ__(4, 6) || defined(__clang__) || defined(__lint__)
 #define	__unreachable()	__builtin_unreachable()
 #else
 #define	__unreachable()	do {} while (/*CONSTCOND*/0)
 #endif
 #if defined(_KERNEL) || defined(_RUMPKERNEL)
 #if defined(__clang__) && __has_feature(address_sanitizer)
 #define	__noasan	__attribute__((no_sanitize("kernel-address", "address")))
 #elif __GNUC_PREREQ__(4, 9) && defined(__SANITIZE_ADDRESS__)
 #define	__noasan	__attribute__((no_sanitize_address))
 #else
 #define	__noasan	/* nothing */
 #endif
 #if defined(__clang__) && __has_feature(thread_sanitizer)
 #define	__nocsan	__attribute__((no_sanitize("thread")))
 #elif __GNUC_PREREQ__(4, 9) && defined(__SANITIZE_THREAD__)
 #define	__nocsan	__attribute__((no_sanitize_thread))
 #else
 #define	__nocsan	/* nothing */
 #endif
 #if defined(__clang__) && __has_feature(memory_sanitizer)
 #define	__nomsan	__attribute__((no_sanitize("kernel-memory", "memory")))
 #else
 #define	__nomsan	/* nothing */
 #endif
 #if defined(__clang__) && __has_feature(undefined_behavior_sanitizer)
 #define __noubsan	__attribute__((no_sanitize("undefined")))
 #elif __GNUC_PREREQ__(4, 9) && defined(__SANITIZE_UNDEFINED__)
 #define __noubsan	__attribute__((no_sanitize_undefined))
 #else
 #define __noubsan	/* nothing */
 #endif
 #endif
 #if defined(__COVERITY__) ||						\
     __has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__) ||\
     __has_feature(leak_sanitizer) || defined(__SANITIZE_LEAK__)
 #define	__NO_LEAKS
 #endif
 /*
  * To be used when an empty body is required like:
+ *
  * #ifdef DEBUG
  * # define dprintf(a) printf(a)
  * #else
  * # define dprintf(a) __nothing
  * #endif
+ *
  * We use ((void)0) instead of do {} while (0) so that it
  * works on , expressions.
  */
 #define __nothing	(/*LINTED*/(void)0)
 #if defined(__cplusplus)
 #define	__BEGIN_EXTERN_C	extern "C" {
 #define	__END_EXTERN_C		}
 #define	__static_cast(x,y)	static_cast<x>(y)
 #else
 #define	__BEGIN_EXTERN_C
 #define	__END_EXTERN_C
 #define	__static_cast(x,y)	(x)y
 #endif
 #if __GNUC_PREREQ__(4, 0) || defined(__lint__)
 #  define __dso_public	__attribute__((__visibility__("default")))
 #  define __dso_hidden	__attribute__((__visibility__("hidden")))
 #  define __BEGIN_PUBLIC_DECLS	\
 	_Pragma("GCC visibility push(default)") __BEGIN_EXTERN_C
 #  define __END_PUBLIC_DECLS	__END_EXTERN_C _Pragma("GCC visibility pop")
 #  define __BEGIN_HIDDEN_DECLS	\
 	_Pragma("GCC visibility push(hidden)") __BEGIN_EXTERN_C
 #  define __END_HIDDEN_DECLS	__END_EXTERN_C _Pragma("GCC visibility pop")
 #else
 #  define __dso_public
 #  define __dso_hidden
 #  define __BEGIN_PUBLIC_DECLS	__BEGIN_EXTERN_C
 #  define __END_PUBLIC_DECLS	__END_EXTERN_C
 #  define __BEGIN_HIDDEN_DECLS	__BEGIN_EXTERN_C
 #  define __END_HIDDEN_DECLS	__END_EXTERN_C
 #endif
 #if __GNUC_PREREQ__(4, 2) || defined(__lint__)
 #  define __dso_protected	__attribute__((__visibility__("protected")))
 #else
 #  define __dso_protected
 #endif
 #define	__BEGIN_DECLS		__BEGIN_PUBLIC_DECLS
 #define	__END_DECLS		__END_PUBLIC_DECLS
 /*
  * Non-static C99 inline functions are optional bodies.  They don't
  * create global symbols if not used, but can be replaced if desirable.
  * This differs from the behavior of GCC before version 4.3.  The nearest
  * equivalent for older GCC is `extern inline'.  For newer GCC, use the
  * gnu_inline attribute additionally to get the old behavior.
+ *
  * For C99 compilers other than GCC, the C99 behavior is expected.
  */
 #if defined(__GNUC__) && defined(__GNUC_STDC_INLINE__)
 #define	__c99inline	extern __attribute__((__gnu_inline__)) __inline
 #elif defined(__GNUC__)
 #define	__c99inline	extern __inline
 #elif defined(__STDC_VERSION__) || defined(__lint__)
 #define	__c99inline	__inline
 #endif
 #if defined(__lint__)
 #define __thread	/* delete */
 #define	__packed	__packed
 #define	__aligned(x)	/* delete */
 #define	__section(x)	/* delete */
 #elif __GNUC_PREREQ__(2, 7) || defined(__PCC__) || defined(__lint__)
 #define	__packed	__attribute__((__packed__))
 #define	__aligned(x)	__attribute__((__aligned__(x)))
 #define	__section(x)	__attribute__((__section__(x)))
 #elif defined(_MSC_VER)
 #define	__packed	/* ignore */
 #else
 #define	__packed	error: no __packed for this compiler
 #define	__aligned(x)	error: no __aligned for this compiler
 #define	__section(x)	error: no __section for this compiler
 #endif
 /*
  * C99 defines the restrict type qualifier keyword, which was made available
  * in GCC 2.92.
  */
 #if defined(__lint__)
 #define	__restrict	/* delete __restrict when not supported */
 #elif __STDC_VERSION__ >= 199901L
 #define	__restrict	restrict
 #elif __GNUC_PREREQ__(2, 92) || defined(__lint__)
 #define	__restrict	__restrict__
 #else
 #define	__restrict	/* delete __restrict when not supported */
 #endif
 /*
  * C99 and C++11 define __func__ predefined identifier, which was made
  * available in GCC 2.95.
  */
 #if !(__STDC_VERSION__ >= 199901L) && !(__cplusplus - 0 >= 201103L)
 #if __GNUC_PREREQ__(2, 4) || defined(__lint__)
 #define	__func__	__FUNCTION__
 #else
 #define	__func__	""
 #endif
 #endif /* !(__STDC_VERSION__ >= 199901L) && !(__cplusplus - 0 >= 201103L) */
-#if defined(_KERNEL)
+#if defined(_KERNEL) && defined(NO_KERNEL_RCSIDS)
-#if defined(NO_KERNEL_RCSIDS)
+#undef	__KERNEL_RCSID
-#undef __KERNEL_RCSID
+#define	__KERNEL_RCSID(_n, _s)	/* nothing */
-#define	__KERNEL_RCSID(_n, _s)		/* nothing */
+#undef	__RCSID
-#endif /* NO_KERNEL_RCSIDS */
+#define	__RCSID(_s)		/* nothing */
-#endif /* _KERNEL */
+#endif
 #if !defined(_STANDALONE) && !defined(_KERNEL)
 #if defined(__GNUC__) || defined(__PCC__)
 #define	__RENAME(x)	___RENAME(x)
 #elif defined(__lint__)
 #define	__RENAME(x)	__symbolrename(x)
 #else
 #error "No function renaming possible"
 #endif /* __GNUC__ */
 #else /* _STANDALONE || _KERNEL */
 #define	__RENAME(x)	no renaming in kernel/standalone environment
 #endif
 /*
  * A barrier to stop the optimizer from moving code or assume live
  * register values. This is gcc specific, the version is more or less
  * arbitrary, might work with older compilers.
  */
 #if __GNUC_PREREQ__(2, 95) || defined(__lint__)
 #define	__insn_barrier()	__asm __volatile("":::"memory")
 #else
 #define	__insn_barrier()	/* */
 #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 use 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) || defined(__lint__)
 #define	__predict_true(exp)	__builtin_expect((exp) != 0, 1)
 #define	__predict_false(exp)	__builtin_expect((exp) != 0, 0)
 #else
 #define	__predict_true(exp)	(exp)
 #define	__predict_false(exp)	(exp)
 #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(__lint__)
 #define __printflike(fmtarg, firstvararg)	\
 	    __attribute__((__format__ (__printf__, fmtarg, firstvararg)))
 #ifndef __syslog_attribute__
 #define __syslog__ __printf__
 #endif
 #define __sysloglike(fmtarg, firstvararg)	\
 	    __attribute__((__format__ (__syslog__, fmtarg, firstvararg)))
 #define __scanflike(fmtarg, firstvararg)	\
 	    __attribute__((__format__ (__scanf__, fmtarg, firstvararg)))
 #define __format_arg(fmtarg)    __attribute__((__format_arg__ (fmtarg)))
 #else
 #define __printflike(fmtarg, firstvararg)	/* nothing */
 #define __scanflike(fmtarg, firstvararg)	/* nothing */
 #define __sysloglike(fmtarg, firstvararg)	/* nothing */
 #define __format_arg(fmtarg)			/* nothing */
 #endif
 /*
  * Macros for manipulating "link sets".  Link sets are arrays of pointers
  * to objects, which are gathered up by the linker.
+ *
  * Object format-specific code has provided us with the following macros:
+ *
  *	__link_set_add_text(set, sym)
  *		Add a reference to the .text symbol `sym' to `set'.
+ *
  *	__link_set_add_rodata(set, sym)
  *		Add a reference to the .rodata symbol `sym' to `set'.
+ *
  *	__link_set_add_data(set, sym)
  *		Add a reference to the .data symbol `sym' to `set'.
+ *
  *	__link_set_add_bss(set, sym)
  *		Add a reference to the .bss symbol `sym' to `set'.
+ *
  *	__link_set_decl(set, ptype)
  *		Provide an extern declaration of the set `set', which
  *		contains an array of pointers to type `ptype'.  This
  *		macro must be used by any code which wishes to reference
  *		the elements of a link set.
+ *
  *	__link_set_start(set)
  *		This points to the first slot in the link set.
+ *
  *	__link_set_end(set)
  *		This points to the (non-existent) slot after the last
  *		entry in the link set.
+ *
  *	__link_set_count(set)
  *		Count the number of entries in link set `set'.
+ *
  * In addition, we provide the following macros for accessing link sets:
+ *
  *	__link_set_foreach(pvar, set)
  *		Iterate over the link set `set'.  Because a link set is
  *		an array of pointers, pvar must be declared as "type **pvar",
  *		and the actual entry accessed as "*pvar".
+ *
  *	__link_set_entry(set, idx)
  *		Access the link set entry at index `idx' from set `set'.
  */
 #define	__link_set_foreach(pvar, set)					\
 	for (pvar = __link_set_start(set); pvar < __link_set_end(set); pvar++)
 #define	__link_set_entry(set, idx)	(__link_set_start(set)[idx])
 /*
  * Return the natural alignment in bytes for the given type
  */
 #if __GNUC_PREREQ__(4, 1) || defined(__lint__)
 #define	__alignof(__t)  __alignof__(__t)
 #else
 #define __alignof(__t) (sizeof(struct { char __x; __t __y; }) - sizeof(__t))
 #endif
 /*
  * Return the number of elements in a statically-allocated array,
  * __x.
  */
 #define	__arraycount(__x)	(sizeof(__x) / sizeof(__x[0]))
 #ifndef __ASSEMBLER__
 /* __BIT(n): nth bit, where __BIT(0) == 0x1. */
 #define	__BIT(__n)	\
     (((uintmax_t)(__n) >= NBBY * sizeof(uintmax_t)) ? 0 : \
     ((uintmax_t)1 << (uintmax_t)((__n) & (NBBY * sizeof(uintmax_t) - 1))))
 /* Macros for min/max. */
 #define	__MIN(a,b)	((/*CONSTCOND*/(a)<=(b))?(a):(b))
 #define	__MAX(a,b)	((/*CONSTCOND*/(a)>(b))?(a):(b))
 /* __BITS(m, n): bits m through n, m < n. */
 #define	__BITS(__m, __n)	\
 	((__BIT(__MAX((__m), (__n)) + 1) - 1) ^ (__BIT(__MIN((__m), (__n))) - 1))
 #endif /* !__ASSEMBLER__ */
 /* find least significant bit that is set */
 #define	__LOWEST_SET_BIT(__mask) ((((__mask) - 1) & (__mask)) ^ (__mask))
 #define	__PRIuBIT	PRIuMAX
 #define	__PRIuBITS	__PRIuBIT
 #define	__PRIxBIT	PRIxMAX
 #define	__PRIxBITS	__PRIxBIT
 #define	__SHIFTOUT(__x, __mask)	(((__x) & (__mask)) / __LOWEST_SET_BIT(__mask))
 #define	__SHIFTIN(__x, __mask) ((__x) * __LOWEST_SET_BIT(__mask))
 #define	__SHIFTOUT_MASK(__mask) __SHIFTOUT((__mask), (__mask))
 /*
  * Only to be used in other headers that are included from both c or c++
  * NOT to be used in code.
  */
 #ifdef __cplusplus
 #define __CAST(__dt, __st)	static_cast<__dt>(__st)
 #else
 #define __CAST(__dt, __st)	((__dt)(__st))
 #endif
 #define __CASTV(__dt, __st)	__CAST(__dt, __CAST(void *, __st))
 #define __CASTCV(__dt, __st)	__CAST(__dt, __CAST(const void *, __st))
 #define __USE(a) (/*LINTED*/(void)(a))
 #define __type_mask(t) (/*LINTED*/sizeof(t) < sizeof(intmax_t) ? \
     (~((1ULL << (sizeof(t) * NBBY)) - 1)) : 0ULL)
 #ifndef __ASSEMBLER__
 static __inline long long __zeroll(void) { return 0; }
 static __inline unsigned long long __zeroull(void) { return 0; }
 #else
 #define __zeroll() (0LL)
 #define __zeroull() (0ULL)
 #endif
 #define __negative_p(x) (!((x) > 0) && ((x) != 0))
 #define __type_min_s(t) ((t)((1ULL << (sizeof(t) * NBBY - 1))))
 #define __type_max_s(t) ((t)~((1ULL << (sizeof(t) * NBBY - 1))))
 #define __type_min_u(t) ((t)0ULL)
 #define __type_max_u(t) ((t)~0ULL)
 #define __type_is_signed(t) (/*LINTED*/__type_min_s(t) + (t)1 < (t)1)
 #define __type_min(t) (__type_is_signed(t) ? __type_min_s(t) : __type_min_u(t))
 #define __type_max(t) (__type_is_signed(t) ? __type_max_s(t) : __type_max_u(t))
 #define __type_fit_u(t, a) (/*LINTED*/!__negative_p(a) && \
     (uintmax_t)((a) + __zeroull()) <= (uintmax_t)__type_max_u(t))
 #define __type_fit_s(t, a) (/*LINTED*/__negative_p(a) ? \
     ((intmax_t)((a) + __zeroll()) >= (intmax_t)__type_min_s(t)) : \
     ((intmax_t)((a) + __zeroll()) >= (intmax_t)0 && \
      (intmax_t)((a) + __zeroll()) <= (intmax_t)__type_max_s(t)))
 /*
  * return true if value 'a' fits in type 't'
  */
 #define __type_fit(t, a) (__type_is_signed(t) ? \
     __type_fit_s(t, a) : __type_fit_u(t, a))
 #endif /* !_SYS_CDEFS_H_ */