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#ifndef COMMON_H
#define COMMON_H
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
#ifndef offsetof
#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
#endif
/**
* 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.
*
*/
#define container_of(ptr, type, member) ({ \
const typeof(((type *)0)->member) * __mptr = (ptr); \
(type *)((char *)__mptr - offsetof(type, member)); })
#define UNUSED(var) {(void)var;}
#endif /*COMMON_H*/
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