Mercurial > hg > nginx-quic
annotate src/event/ngx_event_timer.h @ 5746:35990c69b3ac
Upstream: p->downstream_error instead of closing connection.
Previously, nginx closed client connection in cases when a response body
from upstream was needed to be cached or stored but shouldn't be sent to
the client. While this is normal for HTTP, it is unacceptable for SPDY.
Fix is to use instead the p->downstream_error flag to prevent nginx from
sending anything downstream. To make this work, the event pipe code was
modified to properly cache empty responses with the flag set.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Fri, 04 Jul 2014 20:47:16 +0400 |
parents | d620f497c50f |
children | 1f513d7f1b45 |
rev | line source |
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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 #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> |
50
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14 #include <ngx_event.h> |
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15 |
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16 |
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); |
205
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27 #if (NGX_THREADS) |
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28 extern ngx_mutex_t *ngx_event_timer_mutex; |
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29 #endif |
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31 |
559 | 32 extern ngx_thread_volatile ngx_rbtree_t ngx_event_timer_rbtree; |
207
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34 |
493 | 35 static ngx_inline void |
36 ngx_event_del_timer(ngx_event_t *ev) | |
205
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37 { |
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38 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0, |
557 | 39 "event timer del: %d: %M", |
559 | 40 ngx_event_ident(ev->data), ev->timer.key); |
213
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41 |
563 | 42 ngx_mutex_lock(ngx_event_timer_mutex); |
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43 |
559 | 44 ngx_rbtree_delete(&ngx_event_timer_rbtree, &ev->timer); |
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46 ngx_mutex_unlock(ngx_event_timer_mutex); |
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48 #if (NGX_DEBUG) |
559 | 49 ev->timer.left = NULL; |
50 ev->timer.right = NULL; | |
51 ev->timer.parent = NULL; | |
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52 #endif |
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54 ev->timer_set = 0; |
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55 } |
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56 |
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57 |
493 | 58 static ngx_inline void |
59 ngx_event_add_timer(ngx_event_t *ev, ngx_msec_t timer) | |
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60 { |
561 | 61 ngx_msec_t key; |
62 ngx_msec_int_t diff; | |
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563 | 64 key = ngx_current_msec + timer; |
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65 |
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66 if (ev->timer_set) { |
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67 |
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68 /* |
1807 | 69 * Use a previous timer value if difference between it and a new |
70 * value is less than NGX_TIMER_LAZY_DELAY milliseconds: this allows | |
71 * to minimize the rbtree operations for fast connections. | |
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72 */ |
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73 |
561 | 74 diff = (ngx_msec_int_t) (key - ev->timer.key); |
557 | 75 |
76 if (ngx_abs(diff) < NGX_TIMER_LAZY_DELAY) { | |
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77 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0, |
557 | 78 "event timer: %d, old: %M, new: %M", |
559 | 79 ngx_event_ident(ev->data), ev->timer.key, key); |
303
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80 return; |
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81 } |
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82 |
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83 ngx_del_timer(ev); |
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84 } |
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85 |
559 | 86 ev->timer.key = key; |
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87 |
557 | 88 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0, |
89 "event timer add: %d: %M:%M", | |
559 | 90 ngx_event_ident(ev->data), timer, ev->timer.key); |
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91 |
563 | 92 ngx_mutex_lock(ngx_event_timer_mutex); |
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93 |
559 | 94 ngx_rbtree_insert(&ngx_event_timer_rbtree, &ev->timer); |
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96 ngx_mutex_unlock(ngx_event_timer_mutex); |
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98 ev->timer_set = 1; |
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99 } |
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100 |
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102 #endif /* _NGX_EVENT_TIMER_H_INCLUDED_ */ |