annotate src/event/ngx_event_timer.h @ 34:aab2ea7c0458 NGINX_0_1_17

nginx 0.1.17 *) Change: the ngx_http_rewrite_module was rewritten from the scratch. Now it is possible to redirect, to return the error codes, to check the variables and referrers. The directives can be used inside locations. The redirect directive was canceled. *) Feature: the ngx_http_geo_module. *) Feature: the proxy_set_x_var and fastcgi_set_var directives. *) Bugfix: the location configuration with "=" modifier may be used in another location. *) Bugfix: the correct content type was set only for requests that use small caps letters in extension. *) Bugfix: if the proxy_pass or fastcgi_pass directives were set in the location, and access was denied, and the error was redirected to a static page, then the segmentation fault occurred. *) Bugfix: if in a proxied "Location" header was a relative URL, then a host name and a slash were added to them; bug appeared in 0.1.14. *) Bugfix: the system error message was not logged on Linux.
author Igor Sysoev <http://sysoev.ru>
date Thu, 03 Feb 2005 00:00:00 +0300
parents 74b1868dd3cd
children 41ccba1aba45
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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7 #ifndef _NGX_EVENT_TIMER_H_INCLUDED_
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8 #define _NGX_EVENT_TIMER_H_INCLUDED_
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9
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11 #include <ngx_config.h>
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12 #include <ngx_core.h>
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13 #include <ngx_event.h>
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16 #define NGX_TIMER_INFINITE -1
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17 #define NGX_TIMER_ERROR -2
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19 /*
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20 * 32 bit timer key value resolution
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21 *
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22 * 1 msec - 24 days
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23 * 10 msec - 8 months
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24 * 50 msec - 3 years 5 months
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25 * 100 msec - 6 years 10 months
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26 */
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28 #define NGX_TIMER_RESOLUTION 1
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31 ngx_int_t ngx_event_timer_init(ngx_log_t *log);
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32 ngx_msec_t ngx_event_find_timer(void);
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33 void ngx_event_expire_timers(ngx_msec_t timer);
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36 #if (NGX_THREADS)
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37 extern ngx_mutex_t *ngx_event_timer_mutex;
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38 #endif
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39
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41 extern ngx_thread_volatile ngx_rbtree_t *ngx_event_timer_rbtree;
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42 extern ngx_rbtree_t ngx_event_timer_sentinel;
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45 static ngx_inline void ngx_event_del_timer(ngx_event_t *ev)
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46 {
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47 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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48 "event timer del: %d: %d",
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49 ngx_event_ident(ev->data), ev->rbtree_key);
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50
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51 if (ngx_mutex_lock(ngx_event_timer_mutex) == NGX_ERROR) {
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52 return;
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53 }
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54
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55 ngx_rbtree_delete((ngx_rbtree_t **) &ngx_event_timer_rbtree,
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56 &ngx_event_timer_sentinel,
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57 (ngx_rbtree_t *) &ev->rbtree_key);
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58
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59 ngx_mutex_unlock(ngx_event_timer_mutex);
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60
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61 #if (NGX_DEBUG)
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62 ev->rbtree_left = NULL;
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63 ev->rbtree_right = NULL;
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64 ev->rbtree_parent = NULL;
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65 #endif
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66
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67 ev->timer_set = 0;
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68 }
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71 static ngx_inline void ngx_event_add_timer(ngx_event_t *ev, ngx_msec_t timer)
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72 {
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73 ngx_int_t key;
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74
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75 key = (ngx_int_t)
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76 (ngx_elapsed_msec / NGX_TIMER_RESOLUTION * NGX_TIMER_RESOLUTION
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77 + timer) / NGX_TIMER_RESOLUTION;
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78 #if 0
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79 (ngx_elapsed_msec + timer) / NGX_TIMER_RESOLUTION;
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80 #endif
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81
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82 if (ev->timer_set) {
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84 /*
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85 * Use the previous timer value if a difference between them is less
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86 * then 100 milliseconds. It allows to minimize the rbtree operations
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87 * for the fast connections.
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88 */
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89
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90 if (abs(key - ev->rbtree_key) < 100 / NGX_TIMER_RESOLUTION) {
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91 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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92 "event timer: %d, old: %i, new: %i",
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93 ngx_event_ident(ev->data), ev->rbtree_key, key);
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94 return;
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95 }
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96
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97 ngx_del_timer(ev);
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98 }
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99
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100 ev->rbtree_key = key;
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101
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102 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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103 "event timer add: %d: %i",
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104 ngx_event_ident(ev->data), ev->rbtree_key);
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105
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106 if (ngx_mutex_lock(ngx_event_timer_mutex) == NGX_ERROR) {
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107 return;
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108 }
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109
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110 ngx_rbtree_insert((ngx_rbtree_t **) &ngx_event_timer_rbtree,
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111 &ngx_event_timer_sentinel,
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112 (ngx_rbtree_t *) &ev->rbtree_key);
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113
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114 ngx_mutex_unlock(ngx_event_timer_mutex);
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115
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116 ev->timer_set = 1;
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117 }
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118
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119
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120 #endif /* _NGX_EVENT_TIMER_H_INCLUDED_ */