Cregit: Linux 6.9: timerqueue.h

Contributors: 7
Author	Tokens	Token Proportion	Commits	Commit Proportion
John Stultz	119	68.39%	2	20.00%
Thomas Gleixner	34	19.54%	3	30.00%
Davidlohr Bueso A	17	9.77%	1	10.00%
Greg Kroah-Hartman	1	0.57%	1	10.00%
Barnabás Pőcze	1	0.57%	1	10.00%
Kent Overstreet	1	0.57%	1	10.00%
Michel Lespinasse	1	0.57%	1	10.00%
Total	174		10

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_TIMERQUEUE_H
#define _LINUX_TIMERQUEUE_H

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

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)
{
	struct rb_node *leftmost = rb_first_cached(&head->rb_root);

	return rb_entry_safe(leftmost, struct timerqueue_node, node);
}

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

static inline bool timerqueue_node_queued(struct timerqueue_node *node)
{
	return !RB_EMPTY_NODE(&node->node);
}

static inline bool timerqueue_node_expires(struct timerqueue_node *node)
{
	return node->expires;
}

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