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/* Determine alignment of types.
Copyright (C) 2003-2004, 2006, 2009 Free Software Foundation, Inc.
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 3, or (at your option)
any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#ifndef _ALIGNOF_H
#define _ALIGNOF_H
#include <stddef.h>
/* Determine the alignment of a type at compile time. */
#if defined __GNUC__
# define alignof __alignof__
#elif defined __cplusplus
template <class type> struct alignof_helper { char __slot1; type __slot2; };
# define alignof(type) offsetof (alignof_helper<type>, __slot2)
#else
# define alignof(type) offsetof (struct { char __slot1; type __slot2; }, __slot2)
#endif
#endif /* _ALIGNOF_H */
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