src/include/stddef.h

   1 #ifndef STDDEF_H
   2 #define STDDEF_H
   3
   4 /* for size_t */
   5 #include <stdint.h>
   6
   7 #undef NULL
   8 #define NULL ((void *)0)
   9
  10 #undef offsetof
  11 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
  12
  13 #undef container_of
  14 #define container_of(ptr, type, member) ({                      \
  15         const typeof( ((type *)0)->member ) *__mptr = (ptr);    \
  16         (type *)( (char *)__mptr - offsetof(type,member) );})
  17
  18 /* __WCHAR_TYPE__ is defined by gcc and will change if -fshort-wchar is used */
  19 #ifndef __WCHAR_TYPE__
  20 #define __WCHAR_TYPE__ long int
  21 #endif
  22 typedef __WCHAR_TYPE__ wchar_t;
  23
  24 #endif /* STDDEF_H */