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LibrePilot/flight/PiOS/inc/pios_struct_helper.h
2013-03-24 13:03:53 +02:00

19 lines
565 B
C

/* Taken from include/linux/kernel.h from the Linux kernel tree */
/**
* container_of - cast a member of a structure out to the containing structure
* @ptr: the pointer to the member.
* @type: the type of the container struct this is embedded in.
* @member: the name of the member within the struct.
*
*/
#ifndef PIOS_STRUCT_HELPER_H
#define PIOS_STRUCT_HELPER_H
#define container_of(ptr, type, member) ({ \
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (char *)__mptr - offsetof(type,member) );})
#endif /* PIOS_STRUCT_HELPER_H */