Mercurial > hg > nginx

annotate src/event/ngx_event_connect.c @ 119:cd54bcbaf3b5

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
nginx-0.0.1-2003-07-21-01:15:59 import
author Igor Sysoev <igor@sysoev.ru>
date Sun, 20 Jul 2003 21:15:59 +0000
parents 3973260705cc
children b776ad95d96d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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1
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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2 #include <ngx_event_connect.h>
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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3
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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4
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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5 int ngx_event_connect_peer(ngx_connect_peer_t *cp)
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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6 {
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cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
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7 time_t now;
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3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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8
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cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
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9 /* TODO: cached connection */
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
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10
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
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11 now = ngx_time();
86
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12
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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13 if (cp->peers->number > 1) {
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14
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cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
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15 /* there are several peers */
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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16
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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17 if (cp->tries == cp->peers->number) {
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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18
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19 /* it's a first try - get a current peer */
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
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20
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
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21 /* Here is the race condition when the peers are shared between
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3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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22 the threads or the processes but it should not be serious */
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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23
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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24 cp->cur_peer = cp->peers->current++;
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25
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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26 if (cp->peers->current >= cp->peers->number) {
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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27 cp->peers->current = 0;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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28 }
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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29
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30 /* the end of the race condition */
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31
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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32 #if (NGX_MULTITHREADED || NGX_MULTIPROCESSED)
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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33 /* eliminate the sequences of the race condition */
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34
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35 if (cp->cur_peer >= cp->peers->number) {
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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36 cp->cur_peer = 0;
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37 }
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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38 #endif
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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39 }
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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40
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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41 if (cp->peers->max_fails > 0) {
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42
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43 /* the peers support a fault tolerance */
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
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44
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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45 for ( ;; ) {
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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46 peer = &cp->peers->peers[cp->cur_peer];
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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47
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48 /* Here is the race condition when the peers are shared between
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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49 the threads or the processes but it should not be serious */
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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50
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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51 if (peer->fails <= cp->peers->max_fails
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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52 || (now - peer->accessed > cp->peers->fail_timeout))
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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53 {
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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54 break;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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55 }
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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56
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57 /* the end of the race condition */
86
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58
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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59 cp->cur_peer++;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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60
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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61 if (cp->cur_peer >= cp->peers->number) {
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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62 cp->cur_peer = 0;
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63 }
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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64
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65 cp->tries--;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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66
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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67 if (cp->tries == 0) {
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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68 return NGX_ERROR;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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69 }
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70 }
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71 }
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72 }
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77
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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78 s = ngx_socket(AF_INET, SOCK_STREAM, IPPROTO_IP, 0);
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79
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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80 if (s == -1) {
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cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
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81 ngx_log_error(NGX_LOG_ALERT, cp->log, ngx_socket_errno,
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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82 ngx_socket_n " failed");
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83 return NGX_ERROR;
86
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84 }
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85
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86 if (cp->rcvbuf) {
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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87 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF,
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cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
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88 (const void *) &cp->rcvbuf, sizeof(int)) == -1) {
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
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89 ngx_log_error(NGX_LOG_ALERT, cp->log, ngx_socket_errno,
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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90 "setsockopt(SO_RCVBUF) failed");
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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91
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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92 if (ngx_close_socket(s) == -1) {
119
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93 ngx_log_error(NGX_LOG_ALERT, cp->log, ngx_socket_errno,
86
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94 ngx_close_socket_n " failed");
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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95 }
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96
119
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97 return NGX_ERROR;
86
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98 }
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99 }
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100
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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101 if (ngx_nonblocking(s) == -1) {
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102 ngx_log_error(NGX_LOG_ALERT, cn->log, ngx_socket_errno,
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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103 ngx_nonblocking_n " failed");
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104
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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105 if (ngx_close_socket(s) == -1) {
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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106 ngx_log_error(NGX_LOG_ALERT, cn->log, ngx_socket_errno,
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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107 ngx_close_socket_n " failed");
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108 }
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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109
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110 return NGX_ERROR;
86
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111 }
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112
119
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113 #if (WIN32)
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
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114 /*
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
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115 * Winsock assignes a socket number divisible by 4
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
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116 * so to find a connection we divide a socket number by 4.
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
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117 */
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118
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
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119 if (s % 4) {
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
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120 ngx_log_error(NGX_LOG_EMERG, cp->log, 0,
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
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121 ngx_socket_n
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
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diff changeset
122 " created socket %d, not divisible by 4", s);
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
Igor Sysoev <igor@sysoev.ru>
parents: 86
diff changeset
123 exit(1);
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
Igor Sysoev <igor@sysoev.ru>
parents: 86
diff changeset
124 }
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
Igor Sysoev <igor@sysoev.ru>
parents: 86
diff changeset
125
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
Igor Sysoev <igor@sysoev.ru>
parents: 86
diff changeset
126 c = &ngx_cycle->connections[s / 4];
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
Igor Sysoev <igor@sysoev.ru>
parents: 86
diff changeset
127 rev = &ngx_cycle->read_events[s / 4];
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
Igor Sysoev <igor@sysoev.ru>
parents: 86
diff changeset
128 wev = &ngx_cycle->write_events[s / 4];
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
Igor Sysoev <igor@sysoev.ru>
parents: 86
diff changeset
129
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
Igor Sysoev <igor@sysoev.ru>
parents: 86
diff changeset
130 #else
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
Igor Sysoev <igor@sysoev.ru>
parents: 86
diff changeset
131
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
Igor Sysoev <igor@sysoev.ru>
parents: 86
diff changeset
132 c = &ngx_cycle->connections[s];
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
Igor Sysoev <igor@sysoev.ru>
parents: 86
diff changeset
133 rev = &ngx_cycle->read_events[s];
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
Igor Sysoev <igor@sysoev.ru>
parents: 86
diff changeset
134 wev = &ngx_cycle->write_events[s];
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
Igor Sysoev <igor@sysoev.ru>
parents: 86
diff changeset
135
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
Igor Sysoev <igor@sysoev.ru>
parents: 86
diff changeset
136 #endif
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
137
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
138 instance = rev->instance;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
139
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
140 ngx_memzero(c, sizeof(ngx_connection_t));
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
141 ngx_memzero(rev, sizeof(ngx_event_t));
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
142 ngx_memzero(wev, sizeof(ngx_event_t));
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
143
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
144 rev->index = wev->index = NGX_INVALID_INDEX;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
145 rev->data = wev->data = c;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
146 c->read = rev;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
147 c->write = wev;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
148
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
149 rev->instance = wev->instance = !instance;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
150
119
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
Igor Sysoev <igor@sysoev.ru>
parents: 86
diff changeset
151 !!!!!!!!!!!!!!!
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
Igor Sysoev <igor@sysoev.ru>
parents: 86
diff changeset
152
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
153 rev->log = wev->log = c->log = cn->log;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
154 c->fd = s;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
155 wev->close_handler = rev->close_handler = ngx_event_close_connection;
119
cd54bcbaf3b5 nginx-0.0.1-2003-07-21-01:15:59 import
Igor Sysoev <igor@sysoev.ru>
parents: 86
diff changeset
156 }