Mercurial > hg > nginx
annotate src/event/ngx_event_timer.h @ 9017:c2f5d79cde64 quic
QUIC: separate UDP framework for QUIC.
Previously, QUIC used the existing UDP framework, which was created for UDP in
Stream. However the way QUIC connections are created and looked up is different
from the way UDP connections in Stream are created and looked up. Now these
two implementations are decoupled.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Wed, 20 Apr 2022 16:01:17 +0400 |
parents | 3069dd358ba2 |
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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 #ifndef _NGX_EVENT_TIMER_H_INCLUDED_ |
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9 #define _NGX_EVENT_TIMER_H_INCLUDED_ |
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12 #include <ngx_config.h> |
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13 #include <ngx_core.h> |
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14 #include <ngx_event.h> |
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501 | 17 #define NGX_TIMER_INFINITE (ngx_msec_t) -1 |
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18 |
493 | 19 #define NGX_TIMER_LAZY_DELAY 300 |
20 | |
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22 ngx_int_t ngx_event_timer_init(ngx_log_t *log); |
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23 ngx_msec_t ngx_event_find_timer(void); |
557 | 24 void ngx_event_expire_timers(void); |
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25 ngx_int_t ngx_event_no_timers_left(void); |
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28 extern ngx_rbtree_t ngx_event_timer_rbtree; |
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493 | 31 static ngx_inline void |
32 ngx_event_del_timer(ngx_event_t *ev) | |
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33 { |
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34 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0, |
557 | 35 "event timer del: %d: %M", |
559 | 36 ngx_event_ident(ev->data), ev->timer.key); |
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37 |
559 | 38 ngx_rbtree_delete(&ngx_event_timer_rbtree, &ev->timer); |
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40 #if (NGX_DEBUG) |
559 | 41 ev->timer.left = NULL; |
42 ev->timer.right = NULL; | |
43 ev->timer.parent = NULL; | |
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44 #endif |
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46 ev->timer_set = 0; |
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47 } |
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493 | 50 static ngx_inline void |
51 ngx_event_add_timer(ngx_event_t *ev, ngx_msec_t timer) | |
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52 { |
561 | 53 ngx_msec_t key; |
54 ngx_msec_int_t diff; | |
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563 | 56 key = ngx_current_msec + timer; |
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58 if (ev->timer_set) { |
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60 /* |
1807 | 61 * Use a previous timer value if difference between it and a new |
62 * value is less than NGX_TIMER_LAZY_DELAY milliseconds: this allows | |
63 * to minimize the rbtree operations for fast connections. | |
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64 */ |
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65 |
561 | 66 diff = (ngx_msec_int_t) (key - ev->timer.key); |
557 | 67 |
68 if (ngx_abs(diff) < NGX_TIMER_LAZY_DELAY) { | |
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69 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0, |
557 | 70 "event timer: %d, old: %M, new: %M", |
559 | 71 ngx_event_ident(ev->data), ev->timer.key, key); |
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72 return; |
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73 } |
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74 |
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75 ngx_del_timer(ev); |
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76 } |
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559 | 78 ev->timer.key = key; |
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79 |
557 | 80 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0, |
81 "event timer add: %d: %M:%M", | |
559 | 82 ngx_event_ident(ev->data), timer, ev->timer.key); |
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83 |
559 | 84 ngx_rbtree_insert(&ngx_event_timer_rbtree, &ev->timer); |
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85 |
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86 ev->timer_set = 1; |
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87 } |
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88 |
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89 |
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90 #endif /* _NGX_EVENT_TIMER_H_INCLUDED_ */ |