Mercurial > hg > nginx-quic
annotate src/event/ngx_event_timer.c @ 8171:b1676cd64dc9 quic
QUIC: cleanup send context properly.
The patch resets ctx->frames queue, which may contain frames. It was possible
that congestion or amplification limits prevented all frames to be sent.
Retransmitted frames could be accounted twice as inflight: first time in
ngx_quic_congestion_lost() called from ngx_quic_resend_frames(), and later
from ngx_quic_discard_ctx().
author | Vladimir Homutov <vl@nginx.com> |
---|---|
date | Tue, 27 Oct 2020 00:14:24 +0300 |
parents | 03928f7f209b |
children | 0c5e84096d99 |
rev | line source |
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441
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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5 */ |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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10 #include <ngx_event.h> |
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11 |
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12 |
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13 ngx_rbtree_t ngx_event_timer_rbtree; |
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14 static ngx_rbtree_node_t ngx_event_timer_sentinel; |
205
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15 |
1022 | 16 /* |
17 * the event timer rbtree may contain the duplicate keys, however, | |
18 * it should not be a problem, because we use the rbtree to find | |
19 * a minimum timer value only | |
20 */ | |
205
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21 |
493 | 22 ngx_int_t |
23 ngx_event_timer_init(ngx_log_t *log) | |
205
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24 { |
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25 ngx_rbtree_init(&ngx_event_timer_rbtree, &ngx_event_timer_sentinel, |
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26 ngx_rbtree_insert_timer_value); |
559 | 27 |
270
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28 return NGX_OK; |
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29 } |
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30 |
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31 |
493 | 32 ngx_msec_t |
33 ngx_event_find_timer(void) | |
205
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34 { |
561 | 35 ngx_msec_int_t timer; |
36 ngx_rbtree_node_t *node, *root, *sentinel; | |
205
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37 |
559 | 38 if (ngx_event_timer_rbtree.root == &ngx_event_timer_sentinel) { |
316
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39 return NGX_TIMER_INFINITE; |
213
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40 } |
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41 |
559 | 42 root = ngx_event_timer_rbtree.root; |
43 sentinel = ngx_event_timer_rbtree.sentinel; | |
44 | |
45 node = ngx_rbtree_min(root, sentinel); | |
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46 |
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47 timer = (ngx_msec_int_t) (node->key - ngx_current_msec); |
315
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48 |
559 | 49 return (ngx_msec_t) (timer > 0 ? timer : 0); |
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50 } |
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51 |
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52 |
493 | 53 void |
557 | 54 ngx_event_expire_timers(void) |
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55 { |
559 | 56 ngx_event_t *ev; |
57 ngx_rbtree_node_t *node, *root, *sentinel; | |
58 | |
59 sentinel = ngx_event_timer_rbtree.sentinel; | |
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60 |
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61 for ( ;; ) { |
559 | 62 root = ngx_event_timer_rbtree.root; |
63 | |
64 if (root == sentinel) { | |
65 return; | |
66 } | |
67 | |
68 node = ngx_rbtree_min(root, sentinel); | |
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69 |
6935 | 70 /* node->key > ngx_current_msec */ |
557 | 71 |
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72 if ((ngx_msec_int_t) (node->key - ngx_current_msec) > 0) { |
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73 return; |
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74 } |
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75 |
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76 ev = (ngx_event_t *) ((char *) node - offsetof(ngx_event_t, timer)); |
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77 |
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78 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0, |
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79 "event timer del: %d: %M", |
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80 ngx_event_ident(ev->data), ev->timer.key); |
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81 |
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82 ngx_rbtree_delete(&ngx_event_timer_rbtree, &ev->timer); |
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84 #if (NGX_DEBUG) |
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85 ev->timer.left = NULL; |
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86 ev->timer.right = NULL; |
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87 ev->timer.parent = NULL; |
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88 #endif |
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89 |
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90 ev->timer_set = 0; |
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91 |
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92 ev->timedout = 1; |
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93 |
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94 ev->handler(ev); |
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95 } |
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96 } |
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97 |
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98 |
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99 ngx_int_t |
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100 ngx_event_no_timers_left(void) |
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101 { |
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102 ngx_event_t *ev; |
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103 ngx_rbtree_node_t *node, *root, *sentinel; |
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104 |
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105 sentinel = ngx_event_timer_rbtree.sentinel; |
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106 root = ngx_event_timer_rbtree.root; |
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107 |
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108 if (root == sentinel) { |
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109 return NGX_OK; |
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110 } |
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111 |
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112 for (node = ngx_rbtree_min(root, sentinel); |
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113 node; |
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114 node = ngx_rbtree_next(&ngx_event_timer_rbtree, node)) |
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115 { |
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116 ev = (ngx_event_t *) ((char *) node - offsetof(ngx_event_t, timer)); |
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117 |
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118 if (!ev->cancelable) { |
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119 return NGX_AGAIN; |
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120 } |
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121 } |
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122 |
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123 /* only cancelable timers left */ |
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124 |
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125 return NGX_OK; |
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126 } |