lsquic_attq.h revision 50aadb33 
1/* Copyright (c) 2017 LiteSpeed Technologies Inc.  See LICENSE. */
2/*
3 * lsquic_attq.h -- Advisory Tick Time Queue
4 */
5
6#ifndef LSQUIC_ATTQ_H
7#define LSQUIC_ATTQ_H
8
9struct attq;
10struct lsquic_conn;
11
12
13/* The extra level of indirection is done for speed: swapping heap elements
14 * does not need memory associated with lsquic_conn.
15 */
16struct attq_elem
17{
18    struct lsquic_conn  *ae_conn;
19    lsquic_time_t        ae_adv_time;
20    unsigned             ae_heap_idx;
21};
22
23
24struct attq *
25attq_create (void);
26
27void
28attq_destroy (struct attq *);
29
30/* Return 1 if advisory_time is too small, 0 on success, -1 on failure */
31int
32attq_maybe_add (struct attq *, struct lsquic_conn *,
33                                            lsquic_time_t advisory_time);
34
35/* Return 0 on success, -1 on failure (malloc) */
36int
37attq_add (struct attq *, struct lsquic_conn *, lsquic_time_t advisory_time);
38
39void
40attq_remove (struct attq *, struct lsquic_conn *);
41
42struct lsquic_conn *
43attq_pop (struct attq *, lsquic_time_t cutoff);
44
45unsigned
46attq_count_before (struct attq *, lsquic_time_t cutoff);
47
48const lsquic_time_t *
49attq_next_time (struct attq *);
50
51lsquic_time_t
52attq_set_min (struct attq *, lsquic_time_t new_min);
53
54#endif
55