wtf/AlwaysInline.h

   1 /*
   2  *  Copyright (C) 2005, 2007, 2008 Apple Inc. All rights reserved.
   3  *
   4  *  This library is free software; you can redistribute it and/or
   5  *  modify it under the terms of the GNU Library General Public
   6  *  License as published by the Free Software Foundation; either
   7  *  version 2 of the License, or (at your option) any later version.
   8  *
   9  *  This library is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  *  Library General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU Library General Public License
  15  *  along with this library; see the file COPYING.LIB.  If not, write to
  16  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17  *  Boston, MA 02110-1301, USA.
  18  *
  19  */
  20
  21 #include "Platform.h"
  22
  23 #ifndef ALWAYS_INLINE
  24 #if COMPILER(GCC) && defined(NDEBUG) && !COMPILER(MINGW)
  25 #define ALWAYS_INLINE inline __attribute__((__always_inline__))
  26 #elif COMPILER(MSVC) && defined(NDEBUG)
  27 #define ALWAYS_INLINE __forceinline
  28 #else
  29 #define ALWAYS_INLINE inline
  30 #endif
  31 #endif
  32
  33 #ifndef NEVER_INLINE
  34 #if COMPILER(GCC)
  35 #define NEVER_INLINE __attribute__((__noinline__))
  36 #else
  37 #define NEVER_INLINE
  38 #endif
  39 #endif
  40
  41 #ifndef UNLIKELY
  42 #if COMPILER(GCC)
  43 #define UNLIKELY(x) __builtin_expect((x), 0)
  44 #else
  45 #define UNLIKELY(x) (x)
  46 #endif
  47 #endif
  48
  49 #ifndef LIKELY
  50 #if COMPILER(GCC)
  51 #define LIKELY(x) __builtin_expect((x), 1)
  52 #else
  53 #define LIKELY(x) (x)
  54 #endif
  55 #endif
  56
  57 #ifndef NO_RETURN
  58 #if COMPILER(GCC)
  59 #define NO_RETURN __attribute((__noreturn__))
  60 #else
  61 #define NO_RETURN
  62 #endif
  63 #endif