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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
*
* Copyright © 2010 Rafaël Carré
*
* 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
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef _GCC_EXTENSIONS_H_
#define _GCC_EXTENSIONS_H_
/* Support for some GCC extensions */
/* Compile time check of format for printf/scanf like functions */
#ifdef __GNUC__
#define ATTRIBUTE_PRINTF(fmt, arg1) __attribute__( ( format( printf, fmt, arg1 ) ) )
#define ATTRIBUTE_SCANF(fmt, arg1) __attribute__( ( format( scanf, fmt, arg1 ) ) )
#else
#define ATTRIBUTE_PRINTF(fmt, arg1)
#define ATTRIBUTE_SCANF(fmt, arg1)
#endif
/* Use to give gcc hints on which branch is most likely taken */
#if defined(__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 defined(__GNUC__) && (__GNUC__ >= 3 || \
(__GNUC__ >= 2 && __GNUC_MINOR__ >= 5))
#define NORETURN_ATTR __attribute__((noreturn))
#else
#define NORETURN_ATTR
#endif
#if defined(__GNUC__)
#define FORCE_INLINE inline __attribute__((always_inline))
#else
#define FORCE_INLINE inline
#endif
#if defined(__GNUC__)
#define NO_INLINE __attribute__((noinline))
#else
#define NO_INLINE
#endif
/* Version information from http://ohse.de/uwe/articles/gcc-attributes.html */
#if defined(__GNUC__) && (__GNUC__ >= 4 || \
(__GNUC__ >= 3 && __GNUC_MINOR__ >= 1))
#define USED_ATTR __attribute__((used))
#else
#define USED_ATTR
#endif
#if defined(__GNUC__) && (__GNUC__ >= 3)
#define UNUSED_ATTR __attribute__((unused))
#else
#define UNUSED_ATTR
#endif
#endif /* _GCC_EXTENSIONS_H_ */
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