include/linux/stddef.h

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