lsquic_mm.h revision 10c492f0 
1/* Copyright (c) 2017 - 2018 LiteSpeed Technologies Inc.  See LICENSE. */
2/*
3 * lsquic_mm.h -- Memory manager.
4 *
5 * Allocators and in this class are meant to be used for the lifetime of
6 * QUIC engine.
7 */
8
9#ifndef LSQUIC_MM_H
10#define LSQUIC_MM_H 1
11
12struct lsquic_engine_public;
13struct lsquic_packet_in;
14struct lsquic_packet_out;
15struct ack_info;
16struct malo;
17
18#define MM_N_OUT_BUCKETS 3
19
20struct lsquic_mm {
21    struct ack_info     *acki;
22    struct {
23        struct malo     *stream_frame;  /* For struct stream_frame */
24        struct malo     *stream_rec_arr;/* For struct stream_rec_arr */
25        struct malo     *packet_in;     /* For struct lsquic_packet_in */
26        struct malo     *packet_out;    /* For struct lsquic_packet_out */
27    }                    malo;
28    TAILQ_HEAD(, lsquic_packet_in)  free_packets_in;
29    SLIST_HEAD(, packet_out_buf)    packet_out_bufs[MM_N_OUT_BUCKETS];
30    SLIST_HEAD(, payload_buf)       payload_bufs;
31    SLIST_HEAD(, four_k_page)       four_k_pages;
32    SLIST_HEAD(, sixteen_k_page)    sixteen_k_pages;
33};
34
35int
36lsquic_mm_init (struct lsquic_mm *);
37
38void
39lsquic_mm_cleanup (struct lsquic_mm *);
40
41struct lsquic_packet_in *
42lsquic_mm_get_packet_in (struct lsquic_mm *);
43
44void
45lsquic_mm_put_packet_in (struct lsquic_mm *, struct lsquic_packet_in *);
46
47#define lsquic_packet_in_put(mm, p) do {                                \
48    assert((p)->pi_refcnt != 0);                                        \
49    if (--(p)->pi_refcnt == 0)                                          \
50        lsquic_mm_put_packet_in(mm, p);                                 \
51} while (0)
52
53struct lsquic_packet_out *
54lsquic_mm_get_packet_out (struct lsquic_mm *, struct malo *,
55                          unsigned short size);
56
57void
58lsquic_mm_put_packet_out (struct lsquic_mm *, struct lsquic_packet_out *);
59
60void *
61lsquic_mm_get_1370 (struct lsquic_mm *);
62
63void
64lsquic_mm_put_1370 (struct lsquic_mm *, void *);
65
66void *
67lsquic_mm_get_4k (struct lsquic_mm *);
68
69void
70lsquic_mm_put_4k (struct lsquic_mm *, void *);
71
72void *
73lsquic_mm_get_16k (struct lsquic_mm *);
74
75void
76lsquic_mm_put_16k (struct lsquic_mm *, void *);
77
78size_t
79lsquic_mm_mem_used (const struct lsquic_mm *mm);
80
81#endif
82