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/**************************************************************************
*
* Copyright 2007-2013 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
#include "no_extern_c.h"
#ifndef _C99_COMPAT_H_
#define _C99_COMPAT_H_
/*
* MSVC hacks.
*/
#if defined(_MSC_VER)
# if _MSC_VER < 1800
# error "Microsoft Visual Studio 2013 or higher required"
# endif
/*
* Visual Studio will complain if we define the `inline` keyword, but
* actually it only supports the keyword on C++.
*
* To avoid this the _ALLOW_KEYWORD_MACROS must be set.
*/
# if !defined(_ALLOW_KEYWORD_MACROS)
# define _ALLOW_KEYWORD_MACROS
# endif
/*
* XXX: MSVC has a `__restrict` keyword, but it also has a
* `__declspec(restrict)` modifier, so it is impossible to define a
* `restrict` macro without interfering with the latter. Furthermore the
* MSVC standard library uses __declspec(restrict) under the _CRTRESTRICT
* macro. For now resolve this issue by redefining _CRTRESTRICT, but going
* forward we should probably should stop using restrict, especially
* considering that our code does not obbey strict aliasing rules any way.
*/
# include <crtdefs.h>
# undef _CRTRESTRICT
# define _CRTRESTRICT
#endif
/*
* C99 inline keyword
*/
#ifndef inline
# ifdef __cplusplus
/* C++ supports inline keyword */
# elif defined(__GNUC__)
# define inline __inline__
# elif defined(_MSC_VER)
# define inline __inline
# elif defined(__ICL)
# define inline __inline
# elif defined(__INTEL_COMPILER)
/* Intel compiler supports inline keyword */
# elif defined(__WATCOMC__) && (__WATCOMC__ >= 1100)
# define inline __inline
# elif (__STDC_VERSION__ >= 199901L)
/* C99 supports inline keyword */
# else
# define inline
# endif
#endif
/*
* C99 restrict keyword
*
* See also:
* - http://cellperformance.beyond3d.com/articles/2006/05/demystifying-the-restrict-keyword.html
*/
#ifndef restrict
# if (__STDC_VERSION__ >= 199901L)
/* C99 */
# elif defined(__GNUC__)
# define restrict __restrict__
# elif defined(_MSC_VER)
# define restrict __restrict
# else
# define restrict /* */
# endif
#endif
/*
* C99 __func__ macro
*/
#ifndef __func__
# if (__STDC_VERSION__ >= 199901L)
/* C99 */
# elif defined(__GNUC__)
# define __func__ __FUNCTION__
# elif defined(_MSC_VER)
# define __func__ __FUNCTION__
# else
# define __func__ "<unknown>"
# endif
#endif
/* Simple test case for debugging */
#if 0
static inline const char *
test_c99_compat_h(const void * restrict a,
const void * restrict b)
{
return __func__;
}
#endif
/* Fallback definitions, for build systems other than autoconfig which don't
* auto-detect these things. */
#ifdef HAVE_NO_AUTOCONF
# ifndef _WIN32
# define HAVE_PTHREAD
# define HAVE_POSIX_MEMALIGN
# endif
# ifdef __GNUC__
# if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 2)
# error "GCC version 4.2 or higher required"
# endif
/* https://gcc.gnu.org/onlinedocs/gcc-4.2.4/gcc/Other-Builtins.html */
# define HAVE___BUILTIN_CLZ 1
# define HAVE___BUILTIN_CLZLL 1
# define HAVE___BUILTIN_CTZ 1
# define HAVE___BUILTIN_EXPECT 1
# define HAVE___BUILTIN_FFS 1
# define HAVE___BUILTIN_FFSLL 1
# define HAVE___BUILTIN_POPCOUNT 1
# define HAVE___BUILTIN_POPCOUNTLL 1
/* https://gcc.gnu.org/onlinedocs/gcc-4.2.4/gcc/Function-Attributes.html */
# define HAVE_FUNC_ATTRIBUTE_FLATTEN 1
# define HAVE_FUNC_ATTRIBUTE_UNUSED 1
# define HAVE_FUNC_ATTRIBUTE_FORMAT 1
# define HAVE_FUNC_ATTRIBUTE_PACKED 1
# if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
/* https://gcc.gnu.org/onlinedocs/gcc-4.3.6/gcc/Other-Builtins.html */
# define HAVE___BUILTIN_BSWAP32 1
# define HAVE___BUILTIN_BSWAP64 1
# endif
# if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
# define HAVE___BUILTIN_UNREACHABLE 1
# endif
# endif /* __GNUC__ */
#endif /* !HAVE_AUTOCONF */
#endif /* _C99_COMPAT_H_ */
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