/* * Copyright (c) 2008 Travis Geiselbrecht * * 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, sublicense, 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 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 NONINFRINGEMENT. * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 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. */ #ifndef __COMPILER_H #define __COMPILER_H #ifndef __ASSEMBLY__ #if __GNUC__ #define likely(x) __builtin_expect(!!(x), 1) #define unlikely(x) __builtin_expect(!!(x), 0) #define __UNUSED __attribute__((__unused__)) #define __PACKED __attribute__((packed)) #define __ALIGNED(x) __attribute__((aligned(x))) #define __PRINTFLIKE(__fmt,__varargs) __attribute__((__format__ (__printf__, __fmt, __varargs))) #define __SCANFLIKE(__fmt,__varargs) __attribute__((__format__ (__scanf__, __fmt, __varargs))) #define __SECTION(x) __attribute((section(x))) #define __PURE __attribute((pure)) #define __CONST __attribute((const)) #define __NO_RETURN __attribute__((noreturn)) #define __MALLOC __attribute__((malloc)) #define __WEAK __attribute__((weak)) #define __GNU_INLINE __attribute__((gnu_inline)) #define __GET_CALLER(x) __builtin_return_address(0) /* look for gcc 3.0 and above */ #if (__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 0) #define __ALWAYS_INLINE __attribute__((always_inline)) #else #define __ALWAYS_INLINE #endif /* look for gcc 3.1 and above */ #if !defined(__DEPRECATED) // seems to be built in in some versions of the compiler #if (__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1) #define __DEPRECATED __attribute((deprecated)) #else #define __DEPRECATED #endif #endif /* look for gcc 3.3 and above */ #if (__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3) /* the may_alias attribute was introduced in gcc 3.3; before that, there * was no way to specify aliasiang rules on a type-by-type basis */ #define __MAY_ALIAS __attribute__((may_alias)) /* nonnull was added in gcc 3.3 as well */ #define __NONNULL(x) __attribute((nonnull x)) #else #define __MAY_ALIAS #define __NONNULL(x) #endif /* look for gcc 3.4 and above */ #if (__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) #define __WARN_UNUSED_RESULT __attribute((warn_unused_result)) #else #define __WARN_UNUSED_RESULT #endif #if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1) #define __EXTERNALLY_VISIBLE __attribute__((externally_visible)) #else #define __EXTERNALLY_VISIBLE #endif #else #define likely(x) (x) #define unlikely(x) (x) #define __UNUSED #define __PACKED #define __ALIGNED(x) #define __PRINTFLIKE(__fmt,__varargs) #define __SCANFLIKE(__fmt,__varargs) #define __SECTION(x) #define __PURE #define __CONST #define __NONNULL(x) #define __DEPRECATED #define __WARN_UNUSED_RESULT #define __ALWAYS_INLINE #define __MAY_ALIAS #define __NO_RETURN #endif #endif #endif