src/gcc.h

   1 /* the Music Player Daemon (MPD)
   2  * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
   3  * This project's homepage is: http://www.musicpd.org
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #ifndef MPD_GCC_H
  20 #define MPD_GCC_H
  21
  22 /* this allows us to take advantage of special gcc features while still
  23  * allowing other compilers to compile:
  24  *
  25  * example taken from: http://rlove.org/log/2005102601
  26  */
  27
  28 #if defined(__GNUC__) && (__GNUC__ >= 3)
  29 #  define mpd_const             __attribute__ ((const))
  30 #  define mpd_deprecated        __attribute__ ((deprecated))
  31 #  define mpd_malloc            __attribute__ ((malloc))
  32 #  define mpd_must_check        __attribute__ ((warn_unused_result))
  33 #  define mpd_noreturn          __attribute__ ((noreturn))
  34 #  define mpd_packed            __attribute__ ((packed))
  35 /* these are very useful for type checking */
  36 #  define mpd_printf            __attribute__ ((format(printf,1,2)))
  37 #  define mpd_fprintf           __attribute__ ((format(printf,2,3)))
  38 #  define mpd_fprintf_          __attribute__ ((format(printf,3,4)))
  39 #  define mpd_pure              __attribute__ ((pure))
  40 #  define mpd_scanf             __attribute__ ((format(scanf,1,2)))
  41 #  define mpd_unused            __attribute__ ((unused))
  42 #  define mpd_used              __attribute__ ((used))
  43 /* #  define inline     inline __attribute__ ((always_inline)) */
  44 #  define mpd_noinline          __attribute__ ((noinline))
  45 #  define mpd_likely(x)         __builtin_expect (!!(x), 1)
  46 #  define mpd_unlikely(x)       __builtin_expect (!!(x), 0)
  47 #else
  48 #  define mpd_const
  49 #  define mpd_deprecated
  50 #  define mpd_malloc
  51 #  define mpd_must_check
  52 #  define mpd_noreturn
  53 #  define mpd_packed
  54 #  define mpd_printf
  55 #  define mpd_fprintf
  56 #  define mpd_fprintf_
  57 #  define mpd_pure
  58 #  define mpd_scanf
  59 #  define mpd_unused
  60 #  define mpd_used
  61 /* #  define inline */
  62 #  define mpd_noinline
  63 #  define mpd_likely(x)         (x)
  64 #  define mpd_unlikely(x)       (x)
  65 #endif
  66
  67 #endif /* MPD_GCC_H */