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Nov 8th, 2011
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  1. /**
  2. * container_of - cast a member of a structure out to the containing structure
  3. * @ptr: the pointer to the member.
  4. * @type: the type of the container struct this is embedded in.
  5. * @member: the name of the member within the struct.
  6. *
  7. */
  8. #define container_of(ptr, type, member) ({ \
  9. const typeof( ((type *)0)->member ) *__mptr = (ptr); \
  10. (type *)( (char *)__mptr - offsetof(type,member) );})
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