内核链表使用举例

#ifndef _EVENT_LIST_H_
#define _EVENT_LIST_H_

#include "list.h" // 内核链表头文件

typedef int (*event_cb)(void *data);

typedef struct
{
void *params;
event_cb handle;
struct list_head list;
} event_elem_t;

int EventListAdd(event_elem_t *event, struct list_head *event_head);
int EventListDel(event_elem_t *event, struct list_head *event_head);
void EventListProcess(struct list_head *event_head, void *ret);

#endif /* _EVENT_LIST_H_ */

#include "event_list_.h"
#include <stddef.h>

struct list_head proto_event_list;

LIST_HEAD(proto_event_list);

int EventListAdd(event_elem_t *event, struct list_head *event_head)
{
if(event == NULL || event->handle == NULL)
{
return -2;
}

list_add(&event->list, event_head);

return 0;

}

int EventListDel(event_elem_t *event, struct list_head *event_head)
{
event_elem_t *pevent;
struct list_head *pos;

if(event == NULL || event->handle == NULL)
{
return -2;
}

list_for_each(pos, event_head)
{
const struct list_head *__mptr = pos;
pevent = (event_elem_t *)((char *)__mptr - offsetof(event_elem_t, list) );

if(pevent == event_elem_t)
{
list_del(pos);

return 0;
}
}

return -3;//ERR;

}

void EventListProcess(struct list_head *event_head, void *ret)
{
event_elem_t *pevent;
struct list_head *pos;
const struct list_head *__mptr;

if(list_empty(event_head))
{
return;
}

list_for_each(pos, event_head)
{
__mptr = pos;
pevent = (event_elem_t *)((char *)__mptr - offsetof(event_elem_t, list) );
*(int *)ret = pevent->event_handle(pevent->params);
}
}