José Fonseca | 70fe7c6 | 2013-03-12 11:17:49 +0000 | [diff] [blame] | 1 | /************************************************************************** |
| 2 | * |
| 3 | * Copyright 2007-2013 VMware, Inc. |
| 4 | * All Rights Reserved. |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 7 | * copy of this software and associated documentation files (the |
| 8 | * "Software"), to deal in the Software without restriction, including |
| 9 | * without limitation the rights to use, copy, modify, merge, publish, |
| 10 | * distribute, sub license, and/or sell copies of the Software, and to |
| 11 | * permit persons to whom the Software is furnished to do so, subject to |
| 12 | * the following conditions: |
| 13 | * |
| 14 | * The above copyright notice and this permission notice (including the |
| 15 | * next paragraph) shall be included in all copies or substantial portions |
| 16 | * of the Software. |
| 17 | * |
| 18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| 19 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 20 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
| 21 | * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR |
| 22 | * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| 23 | * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| 24 | * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 25 | * |
| 26 | **************************************************************************/ |
| 27 | |
José Fonseca | bfb4db8 | 2014-12-11 22:14:14 +0000 | [diff] [blame] | 28 | #include "no_extern_c.h" |
| 29 | |
José Fonseca | 70fe7c6 | 2013-03-12 11:17:49 +0000 | [diff] [blame] | 30 | #ifndef _C99_COMPAT_H_ |
| 31 | #define _C99_COMPAT_H_ |
| 32 | |
| 33 | |
| 34 | /* |
José Fonseca | 57cd1d1 | 2013-03-12 20:37:47 +0000 | [diff] [blame] | 35 | * MSVC hacks. |
| 36 | */ |
| 37 | #if defined(_MSC_VER) |
Jose Fonseca | 46110c5 | 2015-02-26 11:47:46 +0000 | [diff] [blame] | 38 | |
Jose Fonseca | 805dbdf | 2016-06-23 11:18:21 +0100 | [diff] [blame] | 39 | # if _MSC_VER < 1800 || (_MSC_FULL_VER < 180031101 && !defined(__clang__)) |
| 40 | # error "Microsoft Visual Studio 2013 Update 4 or higher required" |
Jose Fonseca | 46110c5 | 2015-02-26 11:47:46 +0000 | [diff] [blame] | 41 | # endif |
| 42 | |
José Fonseca | 57cd1d1 | 2013-03-12 20:37:47 +0000 | [diff] [blame] | 43 | /* |
Jose Fonseca | 0d4898a | 2016-02-11 11:36:17 +0000 | [diff] [blame] | 44 | * Visual Studio will complain if we define the `inline` keyword, but |
José Fonseca | 57cd1d1 | 2013-03-12 20:37:47 +0000 | [diff] [blame] | 45 | * actually it only supports the keyword on C++. |
| 46 | * |
José Fonseca | a35a19a | 2013-03-14 17:40:14 +0000 | [diff] [blame] | 47 | * To avoid this the _ALLOW_KEYWORD_MACROS must be set. |
José Fonseca | 57cd1d1 | 2013-03-12 20:37:47 +0000 | [diff] [blame] | 48 | */ |
Jose Fonseca | 0d4898a | 2016-02-11 11:36:17 +0000 | [diff] [blame] | 49 | # if !defined(_ALLOW_KEYWORD_MACROS) |
José Fonseca | a35a19a | 2013-03-14 17:40:14 +0000 | [diff] [blame] | 50 | # define _ALLOW_KEYWORD_MACROS |
José Fonseca | 57cd1d1 | 2013-03-12 20:37:47 +0000 | [diff] [blame] | 51 | # endif |
| 52 | |
| 53 | /* |
| 54 | * XXX: MSVC has a `__restrict` keyword, but it also has a |
| 55 | * `__declspec(restrict)` modifier, so it is impossible to define a |
| 56 | * `restrict` macro without interfering with the latter. Furthermore the |
| 57 | * MSVC standard library uses __declspec(restrict) under the _CRTRESTRICT |
| 58 | * macro. For now resolve this issue by redefining _CRTRESTRICT, but going |
| 59 | * forward we should probably should stop using restrict, especially |
| 60 | * considering that our code does not obbey strict aliasing rules any way. |
| 61 | */ |
| 62 | # include <crtdefs.h> |
| 63 | # undef _CRTRESTRICT |
| 64 | # define _CRTRESTRICT |
| 65 | #endif |
| 66 | |
| 67 | |
| 68 | /* |
José Fonseca | 70fe7c6 | 2013-03-12 11:17:49 +0000 | [diff] [blame] | 69 | * C99 inline keyword |
| 70 | */ |
| 71 | #ifndef inline |
| 72 | # ifdef __cplusplus |
| 73 | /* C++ supports inline keyword */ |
| 74 | # elif defined(__GNUC__) |
| 75 | # define inline __inline__ |
| 76 | # elif defined(_MSC_VER) |
| 77 | # define inline __inline |
| 78 | # elif defined(__ICL) |
| 79 | # define inline __inline |
| 80 | # elif defined(__INTEL_COMPILER) |
| 81 | /* Intel compiler supports inline keyword */ |
| 82 | # elif defined(__WATCOMC__) && (__WATCOMC__ >= 1100) |
| 83 | # define inline __inline |
José Fonseca | 70fe7c6 | 2013-03-12 11:17:49 +0000 | [diff] [blame] | 84 | # elif (__STDC_VERSION__ >= 199901L) |
| 85 | /* C99 supports inline keyword */ |
| 86 | # else |
| 87 | # define inline |
| 88 | # endif |
| 89 | #endif |
| 90 | |
| 91 | |
| 92 | /* |
| 93 | * C99 restrict keyword |
| 94 | * |
| 95 | * See also: |
| 96 | * - http://cellperformance.beyond3d.com/articles/2006/05/demystifying-the-restrict-keyword.html |
| 97 | */ |
| 98 | #ifndef restrict |
| 99 | # if (__STDC_VERSION__ >= 199901L) |
| 100 | /* C99 */ |
José Fonseca | 70fe7c6 | 2013-03-12 11:17:49 +0000 | [diff] [blame] | 101 | # elif defined(__GNUC__) |
| 102 | # define restrict __restrict__ |
| 103 | # elif defined(_MSC_VER) |
| 104 | # define restrict __restrict |
| 105 | # else |
| 106 | # define restrict /* */ |
| 107 | # endif |
| 108 | #endif |
| 109 | |
| 110 | |
| 111 | /* |
| 112 | * C99 __func__ macro |
| 113 | */ |
| 114 | #ifndef __func__ |
| 115 | # if (__STDC_VERSION__ >= 199901L) |
| 116 | /* C99 */ |
José Fonseca | 70fe7c6 | 2013-03-12 11:17:49 +0000 | [diff] [blame] | 117 | # elif defined(__GNUC__) |
Timothy Arceri | 5eec7c8 | 2014-12-12 19:05:22 +1100 | [diff] [blame] | 118 | # define __func__ __FUNCTION__ |
José Fonseca | 70fe7c6 | 2013-03-12 11:17:49 +0000 | [diff] [blame] | 119 | # elif defined(_MSC_VER) |
Jose Fonseca | 46110c5 | 2015-02-26 11:47:46 +0000 | [diff] [blame] | 120 | # define __func__ __FUNCTION__ |
José Fonseca | 70fe7c6 | 2013-03-12 11:17:49 +0000 | [diff] [blame] | 121 | # else |
| 122 | # define __func__ "<unknown>" |
| 123 | # endif |
| 124 | #endif |
| 125 | |
| 126 | |
José Fonseca | 57cd1d1 | 2013-03-12 20:37:47 +0000 | [diff] [blame] | 127 | /* Simple test case for debugging */ |
| 128 | #if 0 |
| 129 | static inline const char * |
| 130 | test_c99_compat_h(const void * restrict a, |
| 131 | const void * restrict b) |
| 132 | { |
| 133 | return __func__; |
| 134 | } |
| 135 | #endif |
| 136 | |
| 137 | |
Jose Fonseca | c068610 | 2016-04-18 11:41:11 +0100 | [diff] [blame] | 138 | /* Fallback definitions, for build systems other than autoconfig which don't |
| 139 | * auto-detect these things. */ |
| 140 | #ifdef HAVE_NO_AUTOCONF |
| 141 | |
| 142 | # ifndef _WIN32 |
| 143 | # define HAVE_PTHREAD |
| 144 | # define HAVE_POSIX_MEMALIGN |
| 145 | # endif |
| 146 | |
| 147 | # ifdef __GNUC__ |
| 148 | # if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 2) |
| 149 | # error "GCC version 4.2 or higher required" |
| 150 | # endif |
| 151 | |
| 152 | /* https://gcc.gnu.org/onlinedocs/gcc-4.2.4/gcc/Other-Builtins.html */ |
| 153 | # define HAVE___BUILTIN_CLZ 1 |
| 154 | # define HAVE___BUILTIN_CLZLL 1 |
| 155 | # define HAVE___BUILTIN_CTZ 1 |
| 156 | # define HAVE___BUILTIN_EXPECT 1 |
| 157 | # define HAVE___BUILTIN_FFS 1 |
| 158 | # define HAVE___BUILTIN_FFSLL 1 |
| 159 | # define HAVE___BUILTIN_POPCOUNT 1 |
| 160 | # define HAVE___BUILTIN_POPCOUNTLL 1 |
| 161 | /* https://gcc.gnu.org/onlinedocs/gcc-4.2.4/gcc/Function-Attributes.html */ |
| 162 | # define HAVE_FUNC_ATTRIBUTE_FLATTEN 1 |
| 163 | # define HAVE_FUNC_ATTRIBUTE_UNUSED 1 |
| 164 | # define HAVE_FUNC_ATTRIBUTE_FORMAT 1 |
| 165 | # define HAVE_FUNC_ATTRIBUTE_PACKED 1 |
Emil Velikov | 52bf10c | 2016-12-05 19:52:41 +0000 | [diff] [blame] | 166 | # define HAVE_FUNC_ATTRIBUTE_ALIAS 1 |
Jose Fonseca | c068610 | 2016-04-18 11:41:11 +0100 | [diff] [blame] | 167 | |
| 168 | # if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) |
| 169 | /* https://gcc.gnu.org/onlinedocs/gcc-4.3.6/gcc/Other-Builtins.html */ |
| 170 | # define HAVE___BUILTIN_BSWAP32 1 |
| 171 | # define HAVE___BUILTIN_BSWAP64 1 |
| 172 | # endif |
| 173 | |
| 174 | # if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5) |
| 175 | # define HAVE___BUILTIN_UNREACHABLE 1 |
| 176 | # endif |
| 177 | |
| 178 | # endif /* __GNUC__ */ |
| 179 | |
| 180 | #endif /* !HAVE_AUTOCONF */ |
| 181 | |
| 182 | |
José Fonseca | 70fe7c6 | 2013-03-12 11:17:49 +0000 | [diff] [blame] | 183 | #endif /* _C99_COMPAT_H_ */ |