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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 
  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
 31 

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