clist.h

/* clist.h */
#ifndef CLIST_H
#define CLIST_H

#include <stdlib.h>

/* define a structure for circular list elements. */
typedef struct CListElmt_ {
	void *data;
	struct CListElmt_ *next;
}CListElmt;

/* define a structure for circular lists.*/
typedef struct CList_ {
	int size;
	int (*match)(const void *key1, const void *key2);
	void (*destroy)(void *data);
	CListElmt *head;
}CList;

/* Public interface */
void clist_init(CList *list, void (*destroy)(void *date));
void clist_destroy(CList *list);
int clist_ins_next(CList *list, CListElmt *element, const void *data);
int clist_rem_next(CList *list, CListElmt *element, void **data);
#define clist_size(list) ((list)->size)
#define clist_head(list) ((list)->head)
#define clist_data(element) ((element)->data)
#define clist_next(element) ((element)->next)

#endif