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
   9 enum {
  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