1 /**************************************************************************
3 * Copyright 2007-2013 VMware, Inc.
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
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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:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
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.
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23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
28 #include "no_extern_c.h"
30 #ifndef _C99_COMPAT_H_
31 #define _C99_COMPAT_H_
40 # error "Microsoft Visual Studio 2008 or higher required"
44 * Visual Studio 2012 will complain if we define the `inline` keyword, but
45 * actually it only supports the keyword on C++.
47 * To avoid this the _ALLOW_KEYWORD_MACROS must be set.
49 # if (_MSC_VER >= 1700) && !defined(_ALLOW_KEYWORD_MACROS)
50 # define _ALLOW_KEYWORD_MACROS
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.
73 /* C++ supports inline keyword */
74 # elif defined(__GNUC__)
75 # define inline __inline__
76 # elif defined(_MSC_VER)
77 # define inline __inline
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
84 # elif defined(__SUNPRO_C) && defined(__C99FEATURES__)
85 /* C99 supports inline keyword */
86 # elif (__STDC_VERSION__ >= 199901L)
87 /* C99 supports inline keyword */
95 * C99 restrict keyword
98 * - http://cellperformance.beyond3d.com/articles/2006/05/demystifying-the-restrict-keyword.html
101 # if (__STDC_VERSION__ >= 199901L)
103 # elif defined(__SUNPRO_C) && defined(__C99FEATURES__)
105 # elif defined(__GNUC__)
106 # define restrict __restrict__
107 # elif defined(_MSC_VER)
108 # define restrict __restrict
110 # define restrict /* */
119 # if (__STDC_VERSION__ >= 199901L)
121 # elif defined(__SUNPRO_C) && defined(__C99FEATURES__)
123 # elif defined(__GNUC__)
124 # define __func__ __FUNCTION__
125 # elif defined(_MSC_VER)
126 # define __func__ __FUNCTION__
128 # define __func__ "<unknown>"
133 /* Simple test case for debugging */
135 static inline const char *
136 test_c99_compat_h(const void * restrict a,
137 const void * restrict b)
144 #endif /* _C99_COMPAT_H_ */