wtf/Alignment.h

   1 /*
   2  *  Copyright (C) 2005, 2006, 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 #ifndef WTF_Alignment_h
  22 #define WTF_Alignment_h
  23
  24 #include <wtf/Platform.h>
  25
  26 #if COMPILER(GCC) || COMPILER(MINGW) || COMPILER(RVCT) || COMPILER(WINSCW) || COMPILER(GCCE)
  27     #define WTF_ALIGN_OF(type) __alignof__(type)
  28     #define WTF_ALIGNED(variable_type, variable, n) variable_type variable __attribute__((__aligned__(n)))
  29 #elif COMPILER(MSVC)
  30     #define WTF_ALIGN_OF(type) __alignof(type)
  31     #define WTF_ALIGNED(variable_type, variable, n) __declspec(align(n)) variable_type variable
  32 #else
  33     #error WTF_ALIGN macros need alignment control.
  34 #endif
  35
  36 #endif // WTF_Alignment_h