LXR linux/include/linux/stddef.h

   1#ifndef _LINUX_STDDEF_H
   2#define _LINUX_STDDEF_H
   3
   4#include <uapi/linux/stddef.h>
   5
   6#undef NULL
   7#define NULL ((void *)0)
   8
   9enum {
  10        false   = 0,
  11        true    = 1
  12};
  13
  14#undef offsetof
  15#ifdef __compiler_offsetof
  16#define offsetof(TYPE, MEMBER)  __compiler_offsetof(TYPE, MEMBER)
  17#else
  18#define offsetof(TYPE, MEMBER)  ((size_t)&((TYPE *)0)->MEMBER)
  19#endif
  20
  21/**
  22 * offsetofend(TYPE, MEMBER)
  23 *
  24 * @TYPE: The type of the structure
  25 * @MEMBER: The member within the structure to get the end offset of
  26 */
  27#define offsetofend(TYPE, MEMBER) \
  28        (offsetof(TYPE, MEMBER) + sizeof(((TYPE *)0)->MEMBER))
  29
  30#endif
  31