Mercurial > hg > nginx
annotate src/event/ngx_event_timer.c @ 5874:2aff40b3dea2
Upstream: proxy_force_ranges and friends.
The directives enable byte ranges for both cached and uncached
responses regardless of backend headers.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Tue, 14 Oct 2014 18:32:01 +0400 |
parents | 3377f9459e99 |
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 #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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13 #if (NGX_THREADS) |
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14 ngx_mutex_t *ngx_event_timer_mutex; |
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15 #endif |
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17 |
559 | 18 ngx_thread_volatile ngx_rbtree_t ngx_event_timer_rbtree; |
19 static ngx_rbtree_node_t ngx_event_timer_sentinel; | |
205
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20 |
1022 | 21 /* |
22 * the event timer rbtree may contain the duplicate keys, however, | |
23 * it should not be a problem, because we use the rbtree to find | |
24 * a minimum timer value only | |
25 */ | |
205
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26 |
493 | 27 ngx_int_t |
28 ngx_event_timer_init(ngx_log_t *log) | |
205
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29 { |
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30 ngx_rbtree_init(&ngx_event_timer_rbtree, &ngx_event_timer_sentinel, |
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31 ngx_rbtree_insert_timer_value); |
559 | 32 |
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33 #if (NGX_THREADS) |
559 | 34 |
35 if (ngx_event_timer_mutex) { | |
270
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36 ngx_event_timer_mutex->log = log; |
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37 return NGX_OK; |
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38 } |
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39 |
501 | 40 ngx_event_timer_mutex = ngx_mutex_init(log, 0); |
41 if (ngx_event_timer_mutex == NULL) { | |
270
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42 return NGX_ERROR; |
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43 } |
559 | 44 |
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45 #endif |
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46 |
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47 return NGX_OK; |
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48 } |
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49 |
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50 |
493 | 51 ngx_msec_t |
52 ngx_event_find_timer(void) | |
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53 { |
561 | 54 ngx_msec_int_t timer; |
55 ngx_rbtree_node_t *node, *root, *sentinel; | |
205
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56 |
559 | 57 if (ngx_event_timer_rbtree.root == &ngx_event_timer_sentinel) { |
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58 return NGX_TIMER_INFINITE; |
213
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59 } |
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60 |
563 | 61 ngx_mutex_lock(ngx_event_timer_mutex); |
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62 |
559 | 63 root = ngx_event_timer_rbtree.root; |
64 sentinel = ngx_event_timer_rbtree.sentinel; | |
65 | |
66 node = ngx_rbtree_min(root, sentinel); | |
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67 |
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68 ngx_mutex_unlock(ngx_event_timer_mutex); |
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69 |
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70 timer = (ngx_msec_int_t) (node->key - ngx_current_msec); |
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71 |
559 | 72 return (ngx_msec_t) (timer > 0 ? timer : 0); |
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73 } |
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74 |
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75 |
493 | 76 void |
557 | 77 ngx_event_expire_timers(void) |
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78 { |
559 | 79 ngx_event_t *ev; |
80 ngx_rbtree_node_t *node, *root, *sentinel; | |
81 | |
82 sentinel = ngx_event_timer_rbtree.sentinel; | |
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83 |
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84 for ( ;; ) { |
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85 |
563 | 86 ngx_mutex_lock(ngx_event_timer_mutex); |
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87 |
559 | 88 root = ngx_event_timer_rbtree.root; |
89 | |
90 if (root == sentinel) { | |
91 return; | |
92 } | |
93 | |
94 node = ngx_rbtree_min(root, sentinel); | |
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95 |
557 | 96 /* node->key <= ngx_current_time */ |
97 | |
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98 if ((ngx_msec_int_t) (node->key - ngx_current_msec) <= 0) { |
559 | 99 ev = (ngx_event_t *) ((char *) node - offsetof(ngx_event_t, timer)); |
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101 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0, |
557 | 102 "event timer del: %d: %M", |
559 | 103 ngx_event_ident(ev->data), ev->timer.key); |
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104 |
559 | 105 ngx_rbtree_delete(&ngx_event_timer_rbtree, &ev->timer); |
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107 ngx_mutex_unlock(ngx_event_timer_mutex); |
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108 |
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109 #if (NGX_DEBUG) |
559 | 110 ev->timer.left = NULL; |
111 ev->timer.right = NULL; | |
112 ev->timer.parent = NULL; | |
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113 #endif |
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114 |
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115 ev->timer_set = 0; |
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116 |
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117 ev->timedout = 1; |
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118 |
509 | 119 ev->handler(ev); |
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120 |
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121 continue; |
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122 } |
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123 |
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124 break; |
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125 } |
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126 |
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127 ngx_mutex_unlock(ngx_event_timer_mutex); |
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128 } |