参考:
#define offsetof(type, member) (size_t)&(((type*)0)->member)
#define container_of(ptr, type, member) ({
const typeof( ((type *)0)->member ) *__mptr = (ptr);
(type *)( (char *)__mptr - offsetof(type,member) );})
参考:
#define offsetof(type, member) (size_t)&(((type*)0)->member)
#define container_of(ptr, type, member) ({
const typeof( ((type *)0)->member ) *__mptr = (ptr);
(type *)( (char *)__mptr - offsetof(type,member) );})