/*

 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>

 *

 * This file is part of Libav.

 *

 * Libav is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * Libav 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

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with Libav; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

/**

 * @file

 * Macro definitions for various function/variable attributes

 */

#ifndef AVUTIL_ATTRIBUTES_H

#define AVUTIL_ATTRIBUTES_H

#ifdef __GNUC__

#    define AV_GCC_VERSION_AT_LEAST(x,y) (__GNUC__ > x || __GNUC__ == x && __GNUC_MINOR__ >= y)

#else

#    define AV_GCC_VERSION_AT_LEAST(x,y) 0

#endif

#if AV_GCC_VERSION_AT_LEAST(3,1)

#    define av_always_inline __attribute__((always_inline)) inline

#elif defined(_MSC_VER)

#    define av_always_inline __forceinline

#else

#    define av_always_inline inline

#endif

#if AV_GCC_VERSION_AT_LEAST(3,1)

#    define av_noinline __attribute__((noinline))

#else

#    define av_noinline

#endif

#if AV_GCC_VERSION_AT_LEAST(3,1)

#    define av_pure __attribute__((pure))

#else

#    define av_pure

#endif

#if AV_GCC_VERSION_AT_LEAST(2,6)

#    define av_const __attribute__((const))

#else

#    define av_const

#endif

#if AV_GCC_VERSION_AT_LEAST(4,3)

#    define av_cold __attribute__((cold))

#else

#    define av_cold

#endif

#if AV_GCC_VERSION_AT_LEAST(4,1)

#    define av_flatten __attribute__((flatten))

#else

#    define av_flatten

#endif

#if AV_GCC_VERSION_AT_LEAST(3,1)

#    define attribute_deprecated __attribute__((deprecated))

#else

#    define attribute_deprecated

#endif

#if defined(__GNUC__)

#    define av_unused __attribute__((unused))

#else

#    define av_unused

#endif

/**

 * Mark a variable as used and prevent the compiler from optimizing it

 * away.  This is useful for variables accessed only from inline

 * assembler without the compiler being aware.

 */

#if AV_GCC_VERSION_AT_LEAST(3,1)

#    define av_used __attribute__((used))

#else

#    define av_used

#endif

#if AV_GCC_VERSION_AT_LEAST(3,3)

#   define av_alias __attribute__((may_alias))

#else

#   define av_alias

#endif

#if defined(__GNUC__) && !defined(__ICC)

#    define av_uninit(x) x=x

#else

#    define av_uninit(x) x

#endif

#ifdef __GNUC__

#    define av_builtin_constant_p __builtin_constant_p

#    define av_printf_format(fmtpos, attrpos) __attribute__((__format__(__printf__, fmtpos, attrpos)))

#else

#    define av_builtin_constant_p(x) 0

#    define av_printf_format(fmtpos, attrpos)

#endif

#if AV_GCC_VERSION_AT_LEAST(2,5)

#    define av_noreturn __attribute__((noreturn))

#else

#    define av_noreturn

#endif

#endif /* AVUTIL_ATTRIBUTES_H */