#include <stddef.h>
/* Determine the alignment of a type at compile time.  */
#if defined __GNUC__ || defined __clang__ || defined __IBM__ALIGNOF__
# define sa_alignof __alignof__
#elif defined __cplusplus
  template <class type> struct sa_alignof_helper { char __slot1; type __slot2; };
# define sa_alignof(type) offsetof (sa_alignof_helper<type>, __slot2)
#elif defined __hpux
  /* Work around a HP-UX 10.20 cc bug with enums constants defined as offsetof
     values.  */
# define sa_alignof(type) (sizeof (type) <= 4 ? 4 : 8)
#elif defined _AIX
  /* Work around an AIX 3.2.5 xlc bug with enums constants defined as offsetof
     values.  */
# define sa_alignof(type) (sizeof (type) <= 4 ? 4 : 8)
#else
# define sa_alignof(type) offsetof (struct { char __slot1; type __slot2; }, __slot2)
#endif

enum
{
/* The desired alignment of memory allocations is the maximum alignment
   among all elementary types.  */
  sa_alignment_long = sa_alignof (long),
  sa_alignment_double = sa_alignof (double),
  sa_alignment_longlong = sa_alignof (long long),
  sa_alignment_longdouble = sa_alignof (long double),
  sa_alignment_max = ((sa_alignment_long - 1) | (sa_alignment_double - 1)
                      | (sa_alignment_longlong - 1)
                      | (sa_alignment_longdouble - 1)
                     ) + 1
};