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39 * Basic types and macros used throughout \Gromacs.
42 * \ingroup module_utility
44 #ifndef GMX_UTILITY_BASEDEFINITIONS_H
45 #define GMX_UTILITY_BASEDEFINITIONS_H
47 /* Information about integer data type sizes */
55 * Boolean type for use in \Gromacs C code.
57 * There is no standard size for 'bool' in C++, so when
58 * we previously defined it to int for C code the data types
59 * (and structs) would have different size depending on your compiler,
60 * both at \Gromacs build time and when you use the library.
61 * The only way around this is to NOT assume anything about the C++ type,
62 * so we cannot use the name 'bool' in our C code anymore.
67 /** False value for ::gmx_bool. */
71 /** True value for ::gmx_bool. */
74 /** Number of gmx_bool values. */
77 /*! \name Fixed-width integer types
79 * These types and macros provide the equivalent of 32- and 64-bit integer
80 * types from C99 headers `stdint.h` and `inttypes.h`. These headers are also
81 * there in C++11. The types and macros from here should be used instead of
83 * MSVC doesn't support these before Visual Studio 2013.
87 typedef __int32 gmx_int32_t;
88 #define GMX_PRId32 "I32d"
89 #define GMX_SCNd32 "I32d"
91 typedef __int64 gmx_int64_t;
92 #define GMX_PRId64 "I64d"
93 #define GMX_SCNd64 "I64d"
95 typedef unsigned __int32 gmx_uint32_t;
96 #define GMX_PRIu32 "I32u"
97 #define GMX_SCNu32 "I32u"
99 typedef unsigned __int64 gmx_uint64_t;
100 #define GMX_PRIu64 "I64u"
101 #define GMX_SCNu64 "I64u"
103 typedef int32_t gmx_int32_t;
104 #define GMX_PRId32 PRId32
105 #define GMX_SCNd32 SCNd32
107 typedef int64_t gmx_int64_t;
108 #define GMX_PRId64 PRId64
109 #define GMX_SCNd64 SCNd64
111 typedef uint32_t gmx_uint32_t;
112 #define GMX_PRIu32 PRIu32
113 #define GMX_SCNu32 SCNu32
115 typedef uint64_t gmx_uint64_t;
116 #define GMX_PRIu64 PRIu64
117 #define GMX_SCNu64 SCNu64
120 #define GMX_INT32_MAX INT32_MAX
121 #define GMX_INT32_MIN INT32_MIN
123 #define GMX_INT64_MAX INT64_MAX
124 #define GMX_INT64_MIN INT64_MIN
126 #define GMX_UINT32_MAX UINT32_MAX
127 #define GMX_UINT32_MIN UINT32_MIN
129 #define GMX_UINT64_MAX UINT64_MAX
130 #define GMX_UINT64_MIN UINT64_MIN
135 * Keyword to use in C code instead of C99 `inline`.
137 * Some of the C compilers we support do not recognize the C99 keyword
138 * `inline`. This macro should be used in C code and in shared C/C++ headers
139 * to indicate a function is inlined.
140 * C++ code should use plain `inline`, as that is already in C++98.
142 #if !defined __cplusplus && _MSC_VER
143 #define gmx_inline __inline
146 #define gmx_inline inline
149 /* ICC, GCC, MSVC, Pathscale, PGI, XLC support __restrict.
150 * Any other compiler can be added here. */
152 * Keyword to use in instead of C99 `restrict`.
154 * We cannot use `restrict` because it is only in C99, but not in C++.
155 * This macro should instead be used to allow easily supporting different
158 #define gmx_restrict __restrict
160 /*! \def gmx_cxx_const
162 * Keyword to work around C/C++ differences in possible const keyword usage.
164 * Some functions that do not modify their input parameters cannot declare
165 * those parameters as `const` and compile warning/error-free on both C and C++
166 * compilers because of differences in `const` semantics. This macro can be
167 * used in cases where C++ allows `const`, but C does not like it, to make the
168 * same declaration work for both.
171 #define gmx_cxx_const const
173 #define gmx_cxx_const
178 * Attribute to suppress compiler warnings about unused function parameters.
180 * This attribute suppresses compiler warnings about unused function arguments
181 * by marking them as possibly unused. Some arguments are unused but
182 * have to be retained to preserve a function signature
183 * that must match that of another function.
184 * Some arguments are only used in *some* conditional compilation code paths
189 /* GCC, clang, and some ICC pretending to be GCC */
190 # define gmx_unused __attribute__ ((unused))
191 #elif (defined(__INTEL_COMPILER) || defined(__ECC)) && !defined(_MSC_VER)
193 # define gmx_unused __attribute__ ((unused))
195 /* Portland group compilers */
196 # define gmx_unused __attribute__ ((unused))
197 #elif defined _MSC_VER
199 # define gmx_unused /*@unused@*/
200 #elif defined(__xlC__)
202 # define gmx_unused __attribute__ ((unused))
208 #ifndef __has_feature
209 /** For compatibility with non-clang compilers. */
210 #define __has_feature(x) 0
213 /*! \def gmx_noreturn
215 * Indicate that a function is not expected to return.
219 #if defined(__GNUC__) || __has_feature(attribute_analyzer_noreturn)
220 #define gmx_noreturn __attribute__((noreturn))
221 #elif defined (_MSC_VER)
222 #define gmx_noreturn __declspec(noreturn)