linux内核链表用户态实现

做内核开发都会用到链表,那么在用户态怎样使用链表呢,其实内核链表只是个头文件,将其移植到用户态就行,下面就是本 人修改后的头文件:
list.h:

#ifndef __LIST_H_
#define __LIST_H_
#include <stdio.h>
struct xm_list_head{
struct xm_list_head *next,*prev;
};
#define xmoffsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
#define xm_container_of(ptr, type, member) ({ \
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
        (type *)( (char *)__mptr - xmoffsetof(type,member) );})
#define xm_list_entry(ptr, type, member) \
        xm_container_of(ptr, type, member)
#define xm_list_for_each_entry_safe(pos,n,head,member) \
for(pos=xm_list_entry((head)->next,typeof(*pos),member), \
        n=xm_list_entry(pos->member.next,typeof(*pos),member); \
        &pos->member!=(head); \
        pos=n,n=xm_list_entry(n->member.next,typeof(*n),member))

static inline void xm_list_init_head(struct xm_list_head *list)
{
    list->next=list;
    list->prev=list;
}
static inline int xm_list_empty(const struct xm_list_head *head)
{
    return head->next == head;
}
static inline void __xm_list_add(struct xm_list_head *_new,
                                 struct xm_list_head *prev,
                                 struct xm_list_head *next)
{
    next->prev = _new;
    _new->next = next;
    _new->prev = prev;
    prev->next = _new;
}
static inline void __xm_list_insert_before(struct xm_list_head *_new,struct xm_list_head *prev,struct xm_list_head *next)
{
    _new->prev=prev;
    _new->next=next;
    next->prev=_new;
    prev->next=_new;
}
static inline void xm_list_add_tail(struct xm_list_head *_new, struct xm_list_head *head)
{
    __xm_list_add(_new, head->prev, head);
}
static inline void xm_list_add_before(struct xm_list_head *_new, struct xm_list_head *head)
{
    __xm_list_insert_before(_new, head->prev, head);
}
static inline void __xm_list_del(struct xm_list_head *prev, struct xm_list_head *next)
{
    next->prev = prev;
    prev->next = next;
}
static inline void xm_list_del(struct xm_list_head *entry)
{
    __xm_list_del(entry->prev, entry->next);
    entry->next = NULL;
    entry->prev = NULL;
}
#endif