list_entry 等

typedef struct guhuo
{
int a;
char c;
int b;
}zqy;

zqy *pp;
typeof(pp->b) a;    OK

#define typez(type,mem) typeof(type->mem)
typez(pp,b)                                 OK

#define list_entry(ptr, type, member) /
        container_of(ptr, type, member)

define typez(type,mem) typeof( ((type*)0) ->mem)
typez(zqy,b)a;                  OK                                               可以用結構體名

#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)

#define list_entry(ptr, type, member) /
        container_of(ptr, type, member)

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