[deliverable/linux.git] / include / linux / timerqueue.h

#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 bool timerqueue_add(struct timerqueue_head *head,
			   struct timerqueue_node *node);
extern bool 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 */
Commit	Line	Data
	1	#ifndef _LINUX_TIMERQUEUE_H
	2	#define _LINUX_TIMERQUEUE_H
	3
	4	#include <linux/rbtree.h>
	5	#include <linux/ktime.h>
	6
	7
	8	struct timerqueue_node {
	9	struct rb_node node;
	10	ktime_t expires;
	11	};
	12
	13	struct timerqueue_head {
	14	struct rb_root head;
	15	struct timerqueue_node *next;
	16	};
	17
	18
	19	extern bool timerqueue_add(struct timerqueue_head *head,
	20	struct timerqueue_node *node);
	21	extern bool timerqueue_del(struct timerqueue_head *head,
	22	struct timerqueue_node *node);
	23	extern struct timerqueue_node *timerqueue_iterate_next(
	24	struct timerqueue_node *node);
	25
	26	/**
	27	* timerqueue_getnext - Returns the timer with the earliest expiration time
	28	*
	29	* @head: head of timerqueue
	30	*
	31	* Returns a pointer to the timer node that has the
	32	* earliest expiration time.
	33	*/
	34	static inline
	35	struct timerqueue_node timerqueue_getnext(struct timerqueue_head head)
	36	{
	37	return head->next;
	38	}
	39
	40	static inline void timerqueue_init(struct timerqueue_node *node)
	41	{
	42	RB_CLEAR_NODE(&node->node);
	43	}
	44
	45	static inline void timerqueue_init_head(struct timerqueue_head *head)
	46	{
	47	head->head = RB_ROOT;
	48	head->next = NULL;
	49	}
	50	#endif /* _LINUX_TIMERQUEUE_H */