/************************************************************************** * * 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 < 1900 # error "Microsoft Visual Studio 2015 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 # define HAVE_FUNC_ATTRIBUTE_ALIAS 1 # define HAVE_FUNC_ATTRIBUTE_NORETURN 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_ */