Mercurial > hg > nginx
annotate src/event/ngx_event_timer.c @ 557:ecd9c160f25b release-0.3.0
nginx-0.3.0-RELEASE import
*) Change: the 10-days live time limit of worker process was
eliminated. The limit was introduced because of millisecond timers
overflow.
author | Igor Sysoev <igor@sysoev.ru> |
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date | Fri, 07 Oct 2005 13:30:52 +0000 |
parents | 563ad09abf50 |
children | c1f965ef9718 |
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 |
441
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4 */ |
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5 |
50
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6 |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 #include <ngx_event.h> |
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10 |
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11 |
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12 #if (NGX_THREADS) |
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13 ngx_mutex_t *ngx_event_timer_mutex; |
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14 #endif |
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15 |
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16 |
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17 ngx_thread_volatile ngx_rbtree_t *ngx_event_timer_rbtree; |
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18 ngx_rbtree_t ngx_event_timer_sentinel; |
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19 |
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20 |
493 | 21 ngx_int_t |
22 ngx_event_timer_init(ngx_log_t *log) | |
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23 { |
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24 if (ngx_event_timer_rbtree) { |
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25 #if (NGX_THREADS) |
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26 ngx_event_timer_mutex->log = log; |
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27 #endif |
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28 return NGX_OK; |
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29 } |
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30 |
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31 ngx_event_timer_rbtree = &ngx_event_timer_sentinel; |
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32 |
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33 #if (NGX_THREADS) |
501 | 34 ngx_event_timer_mutex = ngx_mutex_init(log, 0); |
35 if (ngx_event_timer_mutex == NULL) { | |
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36 return NGX_ERROR; |
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37 } |
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38 #endif |
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39 |
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40 return NGX_OK; |
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41 } |
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42 |
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43 |
493 | 44 ngx_msec_t |
45 ngx_event_find_timer(void) | |
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46 { |
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47 ngx_msec_t timer; |
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48 ngx_rbtree_t *node; |
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49 |
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50 if (ngx_event_timer_rbtree == &ngx_event_timer_sentinel) { |
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51 return NGX_TIMER_INFINITE; |
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52 } |
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53 |
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54 if (ngx_mutex_lock(ngx_event_timer_mutex) == NGX_ERROR) { |
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55 return NGX_TIMER_ERROR; |
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56 } |
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57 |
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58 node = ngx_rbtree_min((ngx_rbtree_t *) ngx_event_timer_rbtree, |
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59 &ngx_event_timer_sentinel); |
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60 |
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61 ngx_mutex_unlock(ngx_event_timer_mutex); |
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62 |
557 | 63 timer = (ngx_msec_t) node->key - ngx_current_time; |
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64 |
535 | 65 return timer > 0 ? timer : 0 ; |
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66 } |
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67 |
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68 |
493 | 69 void |
557 | 70 ngx_event_expire_timers(void) |
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71 { |
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72 ngx_event_t *ev; |
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73 ngx_rbtree_t *node; |
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74 |
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75 for ( ;; ) { |
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76 |
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77 if (ngx_event_timer_rbtree == &ngx_event_timer_sentinel) { |
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78 return; |
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79 } |
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80 |
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81 if (ngx_mutex_lock(ngx_event_timer_mutex) == NGX_ERROR) { |
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82 return; |
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83 } |
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84 |
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85 node = ngx_rbtree_min((ngx_rbtree_t *) ngx_event_timer_rbtree, |
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86 &ngx_event_timer_sentinel); |
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87 |
557 | 88 /* node->key <= ngx_current_time */ |
89 | |
90 if ((ngx_rbtree_key_int_t) node->key | |
91 - (ngx_rbtree_key_int_t) ngx_current_time | |
92 <= 0) | |
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93 { |
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94 ev = (ngx_event_t *) |
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95 ((char *) node - offsetof(ngx_event_t, rbtree_key)); |
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96 |
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97 #if (NGX_THREADS) |
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98 |
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99 if (ngx_threaded && ngx_trylock(ev->lock) == 0) { |
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100 |
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101 /* |
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102 * We can not change the timer of the event that is been |
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103 * handling by another thread. And we can not easy walk |
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104 * the rbtree to find a next expired timer so we exit the loop. |
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105 * However it should be rare case when the event that is |
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106 * been handling has expired timer. |
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107 */ |
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108 |
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109 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0, |
461 | 110 "event %p is busy in expire timers", ev); |
371
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111 break; |
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112 } |
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113 #endif |
371
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parents:
361
diff
changeset
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114 |
780e93985b93
nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents:
361
diff
changeset
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115 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0, |
557 | 116 "event timer del: %d: %M", |
515 | 117 ngx_event_ident(ev->data), ev->rbtree_key); |
371
780e93985b93
nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents:
361
diff
changeset
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118 |
780e93985b93
nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents:
361
diff
changeset
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119 ngx_rbtree_delete((ngx_rbtree_t **) &ngx_event_timer_rbtree, |
780e93985b93
nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents:
361
diff
changeset
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120 &ngx_event_timer_sentinel, |
780e93985b93
nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents:
361
diff
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121 (ngx_rbtree_t *) &ev->rbtree_key); |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
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122 |
371
780e93985b93
nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents:
361
diff
changeset
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123 ngx_mutex_unlock(ngx_event_timer_mutex); |
780e93985b93
nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents:
361
diff
changeset
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124 |
780e93985b93
nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents:
361
diff
changeset
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125 #if (NGX_DEBUG) |
780e93985b93
nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents:
361
diff
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126 ev->rbtree_left = NULL; |
780e93985b93
nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents:
361
diff
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127 ev->rbtree_right = NULL; |
780e93985b93
nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents:
361
diff
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128 ev->rbtree_parent = NULL; |
780e93985b93
nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents:
361
diff
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129 #endif |
780e93985b93
nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents:
361
diff
changeset
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130 |
780e93985b93
nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents:
361
diff
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131 ev->timer_set = 0; |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
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132 |
375
744ccb59062d
nginx-0.0.7-2004-07-02-19:54:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
374
diff
changeset
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133 #if (NGX_THREADS) |
306
6b91bfbc4123
nginx-0.0.3-2004-04-05-00:32:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
275
diff
changeset
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134 if (ngx_threaded) { |
6b91bfbc4123
nginx-0.0.3-2004-04-05-00:32:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
275
diff
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135 if (ngx_mutex_lock(ngx_posted_events_mutex) == NGX_ERROR) { |
6b91bfbc4123
nginx-0.0.3-2004-04-05-00:32:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
275
diff
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136 return; |
6b91bfbc4123
nginx-0.0.3-2004-04-05-00:32:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
275
diff
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|
137 } |
6b91bfbc4123
nginx-0.0.3-2004-04-05-00:32:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
275
diff
changeset
|
138 |
374
213f17e9f776
nginx-0.0.7-2004-07-02-09:47:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
372
diff
changeset
|
139 ev->posted_timedout = 1; |
306
6b91bfbc4123
nginx-0.0.3-2004-04-05-00:32:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
275
diff
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140 ngx_post_event(ev); |
6b91bfbc4123
nginx-0.0.3-2004-04-05-00:32:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
275
diff
changeset
|
141 |
6b91bfbc4123
nginx-0.0.3-2004-04-05-00:32:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
275
diff
changeset
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142 ngx_mutex_unlock(ngx_posted_events_mutex); |
375
744ccb59062d
nginx-0.0.7-2004-07-02-19:54:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
374
diff
changeset
|
143 |
744ccb59062d
nginx-0.0.7-2004-07-02-19:54:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
374
diff
changeset
|
144 ngx_unlock(ev->lock); |
744ccb59062d
nginx-0.0.7-2004-07-02-19:54:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
374
diff
changeset
|
145 |
306
6b91bfbc4123
nginx-0.0.3-2004-04-05-00:32:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
275
diff
changeset
|
146 continue; |
6b91bfbc4123
nginx-0.0.3-2004-04-05-00:32:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
275
diff
changeset
|
147 } |
375
744ccb59062d
nginx-0.0.7-2004-07-02-19:54:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
374
diff
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|
148 #endif |
270
7bb9562216ce
nginx-0.0.2-2004-02-25-23:16:15 import
Igor Sysoev <igor@sysoev.ru>
parents:
266
diff
changeset
|
149 |
374
213f17e9f776
nginx-0.0.7-2004-07-02-09:47:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
372
diff
changeset
|
150 ev->timedout = 1; |
213f17e9f776
nginx-0.0.7-2004-07-02-09:47:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
372
diff
changeset
|
151 |
509 | 152 ev->handler(ev); |
374
213f17e9f776
nginx-0.0.7-2004-07-02-09:47:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
372
diff
changeset
|
153 |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
154 continue; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
155 } |
374
213f17e9f776
nginx-0.0.7-2004-07-02-09:47:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
372
diff
changeset
|
156 |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
157 break; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
158 } |
371
780e93985b93
nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents:
361
diff
changeset
|
159 |
780e93985b93
nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents:
361
diff
changeset
|
160 ngx_mutex_unlock(ngx_event_timer_mutex); |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
161 } |