#ifndef _LINUX_TIMERQUEUE_H
#define _LINUX_TIMERQUEUE_H

#include <linux/rbtree.h>
#include <linux/ktime.h>


struct timerqueue_node {
struct rb_node node;
ktime_t expires;
};

struct timerqueue_head {
struct rb_root head;
struct timerqueue_node *next;
};


extern void timerqueue_add(struct timerqueue_head *head,
struct timerqueue_node *node);
extern void timerqueue_del(struct timerqueue_head *head,
struct timerqueue_node *node);
extern struct timerqueue_node *timerqueue_iterate_next(
struct timerqueue_node *node);

/**
* timerqueue_getnext - Returns the timer with the earliest expiration time
*
* @head: head of timerqueue
*
* Returns a pointer to the timer node that has the
* earliest expiration time.
*/
static inline
struct timerqueue_node *timerqueue_getnext(struct timerqueue_head *head)
{
return head->next;
}

static inline void timerqueue_init(struct timerqueue_node *node)
{
RB_CLEAR_NODE(&node->node);
}

static inline void timerqueue_init_head(struct timerqueue_head *head)
{
head->head = RB_ROOT;
head->next = NULL;
}
#endif /* _LINUX_TIMERQUEUE_H */