/*-
* 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
* 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_
/*
* Testing against Clang-specific extensions.
*/
#ifndef __has_attribute
#define __has_attribute(x) 0
#endif
#ifndef __has_extension
#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 __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)
#else
#endif
#ifndef __INTEL_COMPILER
#endif
#if defined(__INTEL_COMPILER) && defined(__cplusplus) && \
__INTEL_COMPILER < 800
#endif
#endif
#if defined(__GNUC__)
#endif
/*
* Compiler memory barriers, specific to gcc and clang.
*/
#if defined(__GNUC__)
#endif
#ifndef __INTEL_COMPILER
#define __GNUCLIKE_MATH_BUILTIN_RELOPS
#endif
/* XXX: if __GNUC__ >= 2: not tested everywhere originally, where replaced */
#endif /* __GNUC__ || __INTEL_COMPILER */
/*
* Macro to test if we're using a specific version of gcc or later.
*/
#if defined(__GNUC__) && !defined(__INTEL_COMPILER)
#else
#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 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 __CONCAT1(x,y) x ## y
#define __signed signed
#define __volatile volatile
#if defined(__cplusplus)
#else
#if !(defined(__CC_SUPPORTS___INLINE))
#endif /* ! __CC_SUPPORTS___INLINE */
#endif /* !__cplusplus */
#else /* !(__STDC__ || __cplusplus) */
#if !defined(__CC_SUPPORTS___INLINE)
#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 __dead2
#define __pure2
#define __unused
#endif
#define __unused
/* XXX Find out what to do for __packed, __aligned and __section */
#endif
#endif
#else
#define __alloc_size(x)
#endif
#else
#define __alloc_align(x)
#endif
#endif /* lint */
#endif
/*
* Keywords added in C11.
*/
#if !__has_extension(c_alignas)
#else
/* XXX: Only emulates _Alignas(constant-expression); not _Alignas(type-name). */
#endif
#endif
#else
#endif
/*
* No native support for _Atomic(). Place object in structure to prevent
* most forms of direct non-atomic access.
*/
#endif
#else
#endif
/* Nothing, gcc 4.6 and higher has _Static_assert built-in */
#elif defined(__COUNTER__)
#else
#endif
#endif
/*
* 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) || */ \
#else
#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.
*/
#endif
#else
#define __malloc_like
#define __pure
#endif
#else
#define __always_inline
#endif
#else
#define __noinline
#endif
#else
#define __nonnull(x)
#define __nonnull_all
#endif
#else
#define __fastcall
#define __result_use_check
#endif
#else
#define __returns_twice
#endif
#else
#define __unreachable() ((void)0)
#endif
/* XXX: should use `#if __STDC_VERSION__ < 199901'. */
#endif
#if (defined(__INTEL_COMPILER) || (defined(__GNUC__) && __GNUC__ >= 2)) && !defined(__STRICT_ANSI__) || __STDC_VERSION__ >= 199901
#define __LONG_LONG_SUPPORTED
#endif
/* C++11 exposes a load of C99 stuff */
#define __LONG_LONG_SUPPORTED
#ifndef __STDC_LIMIT_MACROS
#define __STDC_LIMIT_MACROS
#endif
#ifndef __STDC_CONSTANT_MACROS
#define __STDC_CONSTANT_MACROS
#endif
#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.
*/
#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
* 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.
*/
#else
#endif
#if __GNUC_PREREQ__(4, 0)
#else
#define __null_sentinel
#define __exported
#define __hidden
#endif
/*
* require it.
*/
#else
#ifndef __cplusplus
#else
(&reinterpret_cast <const volatile char &> \
#endif
#endif
/*
* 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.
*/
#define __containerof(x, 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).
*/
#else
#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__)
#else
#endif /* artificial */
#else
#define __gnu_inline
#endif
/* Compiler-dependent macros that rely on FreeBSD-specific extensions. */
defined(__GNUC__) && !defined(__INTEL_COMPILER)
#else
#endif
#if defined(__GNUC__) || defined(__INTEL_COMPILER)
#ifndef __INTEL_COMPILER
#endif
#ifdef __STDC__
__asm__(".previous")
#else
__asm__(".weak alias"); \
__asm__(".equ alias, sym")
__asm__(".section .gnu.warning.sym"); \
__asm__(".asciz \"msg\""); \
__asm__(".previous")
__asm__(".symver impl, sym@verid")
__asm__(".symver impl, sym@@verid")
#endif /* __STDC__ */
#endif /* __GNUC__ || __INTEL_COMPILER */
#if defined(__GNUC__) || defined(__INTEL_COMPILER)
#else
/*
* The following definition might not work well if used in header files,
* but it should be better than nothing. If you want a "do nothing"
* version, then it should generate some harmless declaration, such as:
* #define __IDSTRING(name,string) struct __hack
*/
#endif
/*
* Embed the rcs id of a source file in the resulting library. Note that in
* more recent ELF binutils, we use .ident allowing the ID to be stripped.
* Usage:
* __FBSDID("$FreeBSD$");
*/
#ifndef __FBSDID
#if !defined(lint) && !defined(STRIP_FBSDID)
#else
#endif
#endif
#ifndef __RCSID
#ifndef NO__RCSID
#else
#endif
#endif
#ifndef __RCSID_SOURCE
#ifndef NO__RCSID_SOURCE
#else
#endif
#endif
#ifndef __SCCSID
#ifndef NO__SCCSID
#else
#endif
#endif
#ifndef __COPYRIGHT
#ifndef NO__COPYRIGHT
#else
#endif
#endif
#ifndef __DECONST
#endif
#ifndef __DEVOLATILE
#endif
#ifndef __DEQUALIFY
#endif
/*-
* The following definitions are an extension of the behavior originally
* implemented in <sys/_posix.h>, 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,
* _POSIX_C_SOURCE == 200112 1003.1-2001
* _POSIX_C_SOURCE == 200809 1003.1-2008
*
* 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 IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */
#endif
/* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2. */
#endif
#ifdef _XOPEN_SOURCE
#if _XOPEN_SOURCE - 0 >= 700
#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)
#endif
#ifdef _POSIX_C_SOURCE
#if _POSIX_C_SOURCE >= 200809
#else
#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 __POSIX_VISIBLE 0
#define __XSI_VISIBLE 0
#define __BSD_VISIBLE 0
#define __POSIX_VISIBLE 0
#define __XSI_VISIBLE 0
#define __BSD_VISIBLE 0
#else /* Default environment: show everything. */
#endif
#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__) && \
#else
#endif
/*
* Lock annotations.
*
* Clang provides support for doing basic thread-safety tests at
*
* Furthermore, it is also possible to annotate variables and structure
* members to enforce that they are only accessed when certain locks are
* held.
*/
#else
#define __lock_annotate(x)
#endif
/* Structure implements a lock. */
/* Function acquires an exclusive or shared lock. */
#define __locks_exclusive(...) \
#define __locks_shared(...) \
/* Function attempts to acquire an exclusive or shared lock. */
#define __trylocks_exclusive(...) \
#define __trylocks_shared(...) \
/* Function releases a lock. */
/* Function asserts that an exclusive or shared lock is held. */
#define __asserts_exclusive(...) \
#define __asserts_shared(...) \
/* Function requires that an exclusive or shared lock is or is not held. */
#define __requires_exclusive(...) \
#define __requires_shared(...) \
#define __requires_unlocked(...) \
/* Function should not be analyzed. */
/* Guard variables and structure members by lock. */
#endif /* !_SYS_CDEFS_H_ */