diff options
Diffstat (limited to '')
| -rw-r--r-- | util.h | 63 |
1 files changed, 63 insertions, 0 deletions
@@ -0,0 +1,63 @@ +/* Copyright (C) 2001-2021 Red Hat, Inc. + Copyright (C) 2003 Free Software Foundation, Inc. + Copyright (C) 2019-2021 SUSE LLC. + Written by Jakub Jelinek <jakub@redhat.com>, 2012. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; see the file COPYING. If not, write to + the Free Software Foundation, 51 Franklin Street - Fifth Floor, + Boston, MA 02110-1301, USA. */ + +/* Utility macros. */ + +#define IMPLIES(A, B) (!((A) && !(B))) + +#define MAX(A, B) ((A) > (B) ? (A) : (B)) +#define MIN(A, B) ((A) < (B) ? (A) : (B)) + +#define XSTR(s) STR(s) +#define STR(s) #s + +#ifndef USE_GNUC +#ifdef __GNUC__ +#define USE_GNUC 1 +#else +#define USE_GNUC 0 +#endif +#endif + +#if USE_GNUC && __GNUC__ >= 3 +# define likely(x) __builtin_expect (!!(x), 1) +# define unlikely(x) __builtin_expect (!!(x), 0) +#else +# define likely(x) (x) +# define unlikely(x) (x) +#endif + +#if USE_GNUC +# define FORCE_INLINE __attribute__((always_inline)) +# define UNUSED __attribute__((unused)) +# define USED __attribute__((used)) +#else +# define FORCE_INLINE +# define UNUSED +# define USED +#endif + +#if USE_GNUC +# define ALIGN_STRUCT(name) +# define ALIGNOF_STRUCT(name) __alignof__ (struct name) +#else +# define ALIGN_STRUCT(name) struct align_##name { char c; struct name s; }; +# define ALIGNOF_STRUCT(name) offsetof (struct align_##name, s) +#endif |