1 /* libunwind - a platform-independent unwind library 2 Copyright (C) 2001-2005 Hewlett-Packard Co 3 Copyright (C) 2007 David Mosberger-Tang 4 Contributed by David Mosberger-Tang <dmosberger@gmail.com> 5 6 This file is part of libunwind. 7 8 Permission is hereby granted, free of charge, to any person obtaining 9 a copy of this software and associated documentation files (the 10 "Software"), to deal in the Software without restriction, including 11 without limitation the rights to use, copy, modify, merge, publish, 12 distribute, sublicense, and/or sell copies of the Software, and to 13 permit persons to whom the Software is furnished to do so, subject to 14 the following conditions: 15 16 The above copyright notice and this permission notice shall be 17 included in all copies or substantial portions of the Software. 18 19 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 20 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 21 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 22 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 23 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 24 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 25 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 26 27 /* Compiler specific useful bits that are used in libunwind, and also in the 28 * tests. */ 29 30 #ifndef COMPILER_H 31 #define COMPILER_H 32 33 #ifdef __GNUC__ 34 # define CONST_ATTR __attribute__((__const__)) 35 # define UNUSED __attribute__((unused)) 36 # define NOINLINE __attribute__((noinline)) 37 # define NORETURN __attribute__((noreturn)) 38 # define ALIAS2(name) #name 39 # define ALIAS(name) __attribute__((alias (ALIAS2(name)))) 40 # if (__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ > 2) 41 # define ALWAYS_INLINE inline __attribute__((always_inline)) 42 # define HIDDEN __attribute__((visibility ("hidden"))) 43 # else 44 # define ALWAYS_INLINE 45 # define HIDDEN 46 # endif 47 # define WEAK __attribute__((weak)) 48 # if (__GNUC__ >= 3) 49 # define likely(x) __builtin_expect ((x), 1) 50 # define unlikely(x) __builtin_expect ((x), 0) 51 # else 52 # define likely(x) (x) 53 # define unlikely(x) (x) 54 # endif 55 #else 56 # define ALWAYS_INLINE 57 # define CONST_ATTR 58 # define UNUSED 59 # define NOINLINE 60 # define NORETURN 61 # define ALIAS(name) 62 # define HIDDEN 63 # define WEAK 64 # define likely(x) (x) 65 # define unlikely(x) (x) 66 #endif 67 68 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) 69 70 #endif /* COMPILER_H */ 71