110 lines
3.6 KiB
C
110 lines
3.6 KiB
C
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/*
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* Copyright (c) 2008 Travis Geiselbrecht
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef __COMPILER_H
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#define __COMPILER_H
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#ifndef __ASSEMBLY__
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#if __GNUC__
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#define likely(x) __builtin_expect(!!(x), 1)
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#define unlikely(x) __builtin_expect(!!(x), 0)
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#define __UNUSED __attribute__((__unused__))
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#define __PACKED __attribute__((packed))
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#define __ALIGNED(x) __attribute__((aligned(x)))
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#define __PRINTFLIKE(__fmt,__varargs) __attribute__((__format__ (__printf__, __fmt, __varargs)))
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#define __SCANFLIKE(__fmt,__varargs) __attribute__((__format__ (__scanf__, __fmt, __varargs)))
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#define __SECTION(x) __attribute((section(x)))
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#define __PURE __attribute((pure))
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#define __CONST __attribute((const))
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#define __NO_RETURN __attribute__((noreturn))
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#define __MALLOC __attribute__((malloc))
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#define __WEAK __attribute__((weak))
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#define __GNU_INLINE __attribute__((gnu_inline))
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#define __GET_CALLER(x) __builtin_return_address(0)
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/* look for gcc 3.0 and above */
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#if (__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 0)
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#define __ALWAYS_INLINE __attribute__((always_inline))
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#else
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#define __ALWAYS_INLINE
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#endif
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/* look for gcc 3.1 and above */
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#if !defined(__DEPRECATED) // seems to be built in in some versions of the compiler
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#if (__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)
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#define __DEPRECATED __attribute((deprecated))
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#else
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#define __DEPRECATED
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#endif
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#endif
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/* look for gcc 3.3 and above */
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#if (__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3)
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/* the may_alias attribute was introduced in gcc 3.3; before that, there
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* was no way to specify aliasiang rules on a type-by-type basis */
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#define __MAY_ALIAS __attribute__((may_alias))
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/* nonnull was added in gcc 3.3 as well */
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#define __NONNULL(x) __attribute((nonnull x))
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#else
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#define __MAY_ALIAS
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#define __NONNULL(x)
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#endif
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/* look for gcc 3.4 and above */
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#if (__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
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#define __WARN_UNUSED_RESULT __attribute((warn_unused_result))
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#else
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#define __WARN_UNUSED_RESULT
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#endif
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#if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)
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#define __EXTERNALLY_VISIBLE __attribute__((externally_visible))
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#else
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#define __EXTERNALLY_VISIBLE
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#endif
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#else
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#define likely(x) (x)
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#define unlikely(x) (x)
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#define __UNUSED
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#define __PACKED
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#define __ALIGNED(x)
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#define __PRINTFLIKE(__fmt,__varargs)
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#define __SCANFLIKE(__fmt,__varargs)
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#define __SECTION(x)
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#define __PURE
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#define __CONST
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#define __NONNULL(x)
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#define __DEPRECATED
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#define __WARN_UNUSED_RESULT
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#define __ALWAYS_INLINE
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#define __MAY_ALIAS
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#define __NO_RETURN
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#endif
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#endif
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#endif
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