linux/include/linux/timerqueue.h
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   1#ifndef _LINUX_TIMERQUEUE_H
   2#define _LINUX_TIMERQUEUE_H
   3
   4#include <linux/rbtree.h>
   5#include <linux/ktime.h>
   6
   7
   8struct timerqueue_node {
   9        struct rb_node node;
  10        ktime_t expires;
  11};
  12
  13struct timerqueue_head {
  14        struct rb_root head;
  15        struct timerqueue_node *next;
  16};
  17
  18
  19extern void timerqueue_add(struct timerqueue_head *head,
  20                                struct timerqueue_node *node);
  21extern void timerqueue_del(struct timerqueue_head *head,
  22                                struct timerqueue_node *node);
  23extern 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 */
  34static inline
  35struct timerqueue_node *timerqueue_getnext(struct timerqueue_head *head)
  36{
  37        return head->next;
  38}
  39
  40static inline void timerqueue_init(struct timerqueue_node *node)
  41{
  42        rb_init_node(&node->node);
  43}
  44
  45static 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 */
  51
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