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annotate src/event/ngx_event_timer.c @ 1022:7058eb754ef0

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author Igor Sysoev <igor@sysoev.ru>
date Fri, 12 Jan 2007 19:26:38 +0000
parents a7c8cbb4c55f
children 4fc402c3ec73
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441
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
Igor Sysoev <igor@sysoev.ru>
parents: 381
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1
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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2 /*
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42d11f017717 nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
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3 * Copyright (C) Igor Sysoev
441
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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4 */
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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5
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b288069a8696 nginx-0.0.1-2003-01-23-21:47:54 import
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6
b288069a8696 nginx-0.0.1-2003-01-23-21:47:54 import
Igor Sysoev <igor@sysoev.ru>
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7 #include <ngx_config.h>
b288069a8696 nginx-0.0.1-2003-01-23-21:47:54 import
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8 #include <ngx_core.h>
b288069a8696 nginx-0.0.1-2003-01-23-21:47:54 import
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9 #include <ngx_event.h>
b288069a8696 nginx-0.0.1-2003-01-23-21:47:54 import
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10
b288069a8696 nginx-0.0.1-2003-01-23-21:47:54 import
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11
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5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
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12 #if (NGX_THREADS)
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7bb9562216ce nginx-0.0.2-2004-02-25-23:16:15 import
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13 ngx_mutex_t *ngx_event_timer_mutex;
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
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14 #endif
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
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15
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00cafae0bdf1 nginx-0.0.1-2003-12-14-23:10:27 import
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16
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c1f965ef9718 nginx-0.3.1-RELEASE import
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17 ngx_thread_volatile ngx_rbtree_t ngx_event_timer_rbtree;
c1f965ef9718 nginx-0.3.1-RELEASE import
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18 static ngx_rbtree_node_t ngx_event_timer_sentinel;
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19
1022
7058eb754ef0 add comment
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20 /*
7058eb754ef0 add comment
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21 * the event timer rbtree may contain the duplicate keys, however,
7058eb754ef0 add comment
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22 * it should not be a problem, because we use the rbtree to find
7058eb754ef0 add comment
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23 * a minimum timer value only
7058eb754ef0 add comment
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24 */
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25
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975f62e77f02 nginx-0.1.21-RELEASE import
Igor Sysoev <igor@sysoev.ru>
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26 ngx_int_t
975f62e77f02 nginx-0.1.21-RELEASE import
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27 ngx_event_timer_init(ngx_log_t *log)
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28 {
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c1f965ef9718 nginx-0.3.1-RELEASE import
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29 ngx_event_timer_rbtree.root = &ngx_event_timer_sentinel;
c1f965ef9718 nginx-0.3.1-RELEASE import
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30 ngx_event_timer_rbtree.sentinel = &ngx_event_timer_sentinel;
853
a7c8cbb4c55f rbtree insert procedure
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31 ngx_event_timer_rbtree.insert = ngx_rbtree_insert_timer_value;
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c1f965ef9718 nginx-0.3.1-RELEASE import
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d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
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33 #if (NGX_THREADS)
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34
c1f965ef9718 nginx-0.3.1-RELEASE import
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35 if (ngx_event_timer_mutex) {
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7bb9562216ce nginx-0.0.2-2004-02-25-23:16:15 import
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36 ngx_event_timer_mutex->log = log;
7bb9562216ce nginx-0.0.2-2004-02-25-23:16:15 import
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37 return NGX_OK;
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e1c815be05ae nginx-0.0.1-2003-12-09-18:08:11 import
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38 }
e1c815be05ae nginx-0.0.1-2003-12-09-18:08:11 import
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39
501
d4ea69372b94 nginx-0.1.25-RELEASE import
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40 ngx_event_timer_mutex = ngx_mutex_init(log, 0);
d4ea69372b94 nginx-0.1.25-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 493
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41 if (ngx_event_timer_mutex == NULL) {
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7bb9562216ce nginx-0.0.2-2004-02-25-23:16:15 import
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42 return NGX_ERROR;
7bb9562216ce nginx-0.0.2-2004-02-25-23:16:15 import
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43 }
559
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45 #endif
270
7bb9562216ce nginx-0.0.2-2004-02-25-23:16:15 import
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46
7bb9562216ce nginx-0.0.2-2004-02-25-23:16:15 import
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47 return NGX_OK;
205
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Igor Sysoev <igor@sysoev.ru>
parents: 195
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48 }
4a9a2b1dd6fa nginx-0.0.1-2003-12-04-17:53:00 import
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49
4a9a2b1dd6fa nginx-0.0.1-2003-12-04-17:53:00 import
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50
493
975f62e77f02 nginx-0.1.21-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 461
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51 ngx_msec_t
975f62e77f02 nginx-0.1.21-RELEASE import
Igor Sysoev <igor@sysoev.ru>
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52 ngx_event_find_timer(void)
205
4a9a2b1dd6fa nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
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53 {
561
e48ebafc6939 nginx-0.3.2-RELEASE import
Igor Sysoev <igor@sysoev.ru>
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54 ngx_msec_int_t timer;
e48ebafc6939 nginx-0.3.2-RELEASE import
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parents: 559
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55 ngx_rbtree_node_t *node, *root, *sentinel;
205
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Igor Sysoev <igor@sysoev.ru>
parents: 195
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56
559
c1f965ef9718 nginx-0.3.1-RELEASE import
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57 if (ngx_event_timer_rbtree.root == &ngx_event_timer_sentinel) {
316
a0beefedaf94 nginx-0.0.3-2004-04-15-00:34:05 import
Igor Sysoev <igor@sysoev.ru>
parents: 315
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58 return NGX_TIMER_INFINITE;
213
f536f91e8e99 nginx-0.0.1-2003-12-19-15:45:27 import
Igor Sysoev <igor@sysoev.ru>
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59 }
f536f91e8e99 nginx-0.0.1-2003-12-19-15:45:27 import
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60
563
9c2f3ed7a247 nginx-0.3.3-RELEASE import
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61 ngx_mutex_lock(ngx_event_timer_mutex);
270
7bb9562216ce nginx-0.0.2-2004-02-25-23:16:15 import
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62
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c1f965ef9718 nginx-0.3.1-RELEASE import
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63 root = ngx_event_timer_rbtree.root;
c1f965ef9718 nginx-0.3.1-RELEASE import
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64 sentinel = ngx_event_timer_rbtree.sentinel;
c1f965ef9718 nginx-0.3.1-RELEASE import
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65
c1f965ef9718 nginx-0.3.1-RELEASE import
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66 node = ngx_rbtree_min(root, sentinel);
205
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67
270
7bb9562216ce nginx-0.0.2-2004-02-25-23:16:15 import
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68 ngx_mutex_unlock(ngx_event_timer_mutex);
7bb9562216ce nginx-0.0.2-2004-02-25-23:16:15 import
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parents: 266
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69
563
9c2f3ed7a247 nginx-0.3.3-RELEASE import
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70 timer = (ngx_msec_int_t) node->key - (ngx_msec_int_t) ngx_current_msec;
315
39b6f2df45c0 nginx-0.0.3-2004-04-14-21:44:28 import
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parents: 306
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71
559
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72 return (ngx_msec_t) (timer > 0 ? timer : 0);
205
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73 }
4a9a2b1dd6fa nginx-0.0.1-2003-12-04-17:53:00 import
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74
4a9a2b1dd6fa nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
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75
493
975f62e77f02 nginx-0.1.21-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 461
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76 void
557
ecd9c160f25b nginx-0.3.0-RELEASE import
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77 ngx_event_expire_timers(void)
205
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parents: 195
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78 {
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c1f965ef9718 nginx-0.3.1-RELEASE import
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parents: 557
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79 ngx_event_t *ev;
c1f965ef9718 nginx-0.3.1-RELEASE import
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80 ngx_rbtree_node_t *node, *root, *sentinel;
c1f965ef9718 nginx-0.3.1-RELEASE import
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81
c1f965ef9718 nginx-0.3.1-RELEASE import
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82 sentinel = ngx_event_timer_rbtree.sentinel;
205
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Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
83
4a9a2b1dd6fa nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
84 for ( ;; ) {
213
f536f91e8e99 nginx-0.0.1-2003-12-19-15:45:27 import
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parents: 212
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85
563
9c2f3ed7a247 nginx-0.3.3-RELEASE import
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parents: 561
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86 ngx_mutex_lock(ngx_event_timer_mutex);
270
7bb9562216ce nginx-0.0.2-2004-02-25-23:16:15 import
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87
559
c1f965ef9718 nginx-0.3.1-RELEASE import
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88 root = ngx_event_timer_rbtree.root;
c1f965ef9718 nginx-0.3.1-RELEASE import
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89
c1f965ef9718 nginx-0.3.1-RELEASE import
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90 if (root == sentinel) {
c1f965ef9718 nginx-0.3.1-RELEASE import
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91 return;
c1f965ef9718 nginx-0.3.1-RELEASE import
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92 }
c1f965ef9718 nginx-0.3.1-RELEASE import
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93
c1f965ef9718 nginx-0.3.1-RELEASE import
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94 node = ngx_rbtree_min(root, sentinel);
205
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95
557
ecd9c160f25b nginx-0.3.0-RELEASE import
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96 /* node->key <= ngx_current_time */
ecd9c160f25b nginx-0.3.0-RELEASE import
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parents: 535
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97
563
9c2f3ed7a247 nginx-0.3.3-RELEASE import
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98 if ((ngx_msec_int_t) node->key - (ngx_msec_int_t) ngx_current_msec <= 0)
205
4a9a2b1dd6fa nginx-0.0.1-2003-12-04-17:53:00 import
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parents: 195
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99 {
559
c1f965ef9718 nginx-0.3.1-RELEASE import
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parents: 557
diff changeset
100 ev = (ngx_event_t *) ((char *) node - offsetof(ngx_event_t, timer));
205
4a9a2b1dd6fa nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
101
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c9fdfccebc49 nginx-0.0.7-2004-06-29-01:03:14 import
Igor Sysoev <igor@sysoev.ru>
parents: 371
diff changeset
102 #if (NGX_THREADS)
375
744ccb59062d nginx-0.0.7-2004-07-02-19:54:34 import
Igor Sysoev <igor@sysoev.ru>
parents: 374
diff changeset
103
744ccb59062d nginx-0.0.7-2004-07-02-19:54:34 import
Igor Sysoev <igor@sysoev.ru>
parents: 374
diff changeset
104 if (ngx_threaded && ngx_trylock(ev->lock) == 0) {
744ccb59062d nginx-0.0.7-2004-07-02-19:54:34 import
Igor Sysoev <igor@sysoev.ru>
parents: 374
diff changeset
105
744ccb59062d nginx-0.0.7-2004-07-02-19:54:34 import
Igor Sysoev <igor@sysoev.ru>
parents: 374
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106 /*
744ccb59062d nginx-0.0.7-2004-07-02-19:54:34 import
Igor Sysoev <igor@sysoev.ru>
parents: 374
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107 * We can not change the timer of the event that is been
744ccb59062d nginx-0.0.7-2004-07-02-19:54:34 import
Igor Sysoev <igor@sysoev.ru>
parents: 374
diff changeset
108 * handling by another thread. And we can not easy walk
744ccb59062d nginx-0.0.7-2004-07-02-19:54:34 import
Igor Sysoev <igor@sysoev.ru>
parents: 374
diff changeset
109 * the rbtree to find a next expired timer so we exit the loop.
744ccb59062d nginx-0.0.7-2004-07-02-19:54:34 import
Igor Sysoev <igor@sysoev.ru>
parents: 374
diff changeset
110 * However it should be rare case when the event that is
744ccb59062d nginx-0.0.7-2004-07-02-19:54:34 import
Igor Sysoev <igor@sysoev.ru>
parents: 374
diff changeset
111 * been handling has expired timer.
744ccb59062d nginx-0.0.7-2004-07-02-19:54:34 import
Igor Sysoev <igor@sysoev.ru>
parents: 374
diff changeset
112 */
744ccb59062d nginx-0.0.7-2004-07-02-19:54:34 import
Igor Sysoev <igor@sysoev.ru>
parents: 374
diff changeset
113
379
73688d5d7fc3 nginx-0.0.7-2004-07-06-20:12:16 import
Igor Sysoev <igor@sysoev.ru>
parents: 375
diff changeset
114 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0,
461
a88a3e4e158f nginx-0.1.5-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 444
diff changeset
115 "event %p is busy in expire timers", ev);
371
780e93985b93 nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents: 361
diff changeset
116 break;
780e93985b93 nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents: 361
diff changeset
117 }
372
c9fdfccebc49 nginx-0.0.7-2004-06-29-01:03:14 import
Igor Sysoev <igor@sysoev.ru>
parents: 371
diff changeset
118 #endif
371
780e93985b93 nginx-0.0.7-2004-06-28-20:05:02 import
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parents: 361
diff changeset
119
780e93985b93 nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents: 361
diff changeset
120 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
557
ecd9c160f25b nginx-0.3.0-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 535
diff changeset
121 "event timer del: %d: %M",
559
c1f965ef9718 nginx-0.3.1-RELEASE import
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parents: 557
diff changeset
122 ngx_event_ident(ev->data), ev->timer.key);
371
780e93985b93 nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents: 361
diff changeset
123
559
c1f965ef9718 nginx-0.3.1-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 557
diff changeset
124 ngx_rbtree_delete(&ngx_event_timer_rbtree, &ev->timer);
205
4a9a2b1dd6fa nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
125
371
780e93985b93 nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents: 361
diff changeset
126 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
127
780e93985b93 nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents: 361
diff changeset
128 #if (NGX_DEBUG)
559
c1f965ef9718 nginx-0.3.1-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 557
diff changeset
129 ev->timer.left = NULL;
c1f965ef9718 nginx-0.3.1-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 557
diff changeset
130 ev->timer.right = NULL;
c1f965ef9718 nginx-0.3.1-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 557
diff changeset
131 ev->timer.parent = NULL;
371
780e93985b93 nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents: 361
diff changeset
132 #endif
780e93985b93 nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents: 361
diff changeset
133
780e93985b93 nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents: 361
diff changeset
134 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
135
375
744ccb59062d nginx-0.0.7-2004-07-02-19:54:34 import
Igor Sysoev <igor@sysoev.ru>
parents: 374
diff changeset
136 #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
137 if (ngx_threaded) {
563
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 561
diff changeset
138 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 changeset
139
563
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 561
diff changeset
140 ngx_post_event(ev, &ngx_posted_events);
375
744ccb59062d nginx-0.0.7-2004-07-02-19:54:34 import
Igor Sysoev <igor@sysoev.ru>
parents: 374
diff changeset
141
744ccb59062d nginx-0.0.7-2004-07-02-19:54:34 import
Igor Sysoev <igor@sysoev.ru>
parents: 374
diff changeset
142 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
143
306
6b91bfbc4123 nginx-0.0.3-2004-04-05-00:32:09 import
Igor Sysoev <igor@sysoev.ru>
parents: 275
diff changeset
144 continue;
6b91bfbc4123 nginx-0.0.3-2004-04-05-00:32:09 import
Igor Sysoev <igor@sysoev.ru>
parents: 275
diff changeset
145 }
375
744ccb59062d nginx-0.0.7-2004-07-02-19:54:34 import
Igor Sysoev <igor@sysoev.ru>
parents: 374
diff changeset
146 #endif
270
7bb9562216ce nginx-0.0.2-2004-02-25-23:16:15 import
Igor Sysoev <igor@sysoev.ru>
parents: 266
diff changeset
147
374
213f17e9f776 nginx-0.0.7-2004-07-02-09:47:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 372
diff changeset
148 ev->timedout = 1;
213f17e9f776 nginx-0.0.7-2004-07-02-09:47:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 372
diff changeset
149
509
9b8c906f6e63 nginx-0.1.29-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 501
diff changeset
150 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
151
205
4a9a2b1dd6fa nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
152 continue;
4a9a2b1dd6fa nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
153 }
374
213f17e9f776 nginx-0.0.7-2004-07-02-09:47:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 372
diff changeset
154
205
4a9a2b1dd6fa nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
155 break;
4a9a2b1dd6fa nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
156 }
371
780e93985b93 nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents: 361
diff changeset
157
780e93985b93 nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents: 361
diff changeset
158 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
159 }