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annotate src/event/ngx_event_connect.c @ 86:3973260705cc

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nginx-0.0.1-2003-05-12-19:52:24 import
author Igor Sysoev <igor@sysoev.ru>
date Mon, 12 May 2003 15:52:24 +0000
parents
children cd54bcbaf3b5
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
86
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 {
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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7
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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8
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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9 if (cp->peers->number > 1) {
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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10
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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11 /* it's a first try - get current peer */
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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12
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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13 if (cp->tries == cp->peers->number) {
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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14
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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15 /* Here is the race condition
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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16 when the peers are shared between
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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17 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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18
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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19 cp->cur_peer = cp->peers->current++;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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20
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21 if (cp->peers->current >= cp->peers->number) {
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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22 cp->peers->current = 0;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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23 }
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24
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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25 /* */
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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26
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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27 #if (NGX_MULTITHREADED || NGX_MULTIPROCESSED)
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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28 /* eliminate the sequences of the race condition */
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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29 if (cp->cur_peer >= cp->peers->number) {
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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30 cp->cur_peer = 0;
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31 }
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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32 #endif
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33 }
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34
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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35 if (cp->peers->max_fails > 0) {
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36
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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37 for ( ;; ) {
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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38 peer = &cp->peers->peers[cp->cur_peer];
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 /* Here is the race condition
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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41 when the peers are shared between
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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42 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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43
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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44 if (peer->fails <= cp->peers->max_fails
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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45 || (now - peer->accessed > cp->peers->fail_timeout))
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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46 {
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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47 break;
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48 }
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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49
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
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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52 cp->cur_peer++;
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 if (cp->cur_peer >= cp->peers->number) {
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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55 cp->cur_peer = 0;
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56 }
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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57
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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58 cp->tries--;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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59
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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60 if (cp->tries == 0) {
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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61 return NGX_ERROR;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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62 }
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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63 }
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64 }
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65 }
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66
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67
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68
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69
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70
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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71 s = ngx_socket(AF_INET, SOCK_STREAM, IPPROTO_IP, 0);
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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72
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73 if (s == -1) {
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74 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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75 ngx_socket_n " failed");
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76 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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77 }
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78
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79 if (cn->rcvbuf) {
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80 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF,
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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81 (const void *) &cn->rcvbuf, sizeof(int)) == -1) {
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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82 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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83 "setsockopt(SO_RCVBUF) failed");
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84
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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85 if (ngx_close_socket(s) == -1) {
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86 ngx_log_error(NGX_LOG_ALERT, cn->log, ngx_socket_errno,
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87 ngx_close_socket_n " failed");
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88 }
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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89
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90 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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91 }
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92 }
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93
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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94 if (ngx_nonblocking(s) == -1) {
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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95 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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96 ngx_nonblocking_n " failed");
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97
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98 if (ngx_close_socket(s) == -1) {
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99 ngx_log_error(NGX_LOG_ALERT, cn->log, ngx_socket_errno,
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100 ngx_close_socket_n " failed");
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101 }
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102
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103 return NGX_HTTP_INTERNAL_SERVER_ERROR;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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104 }
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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105
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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106 c = &ngx_connections[s];
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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107 rev = &ngx_read_events[s];
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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108 wev = &ngx_write_events[s];
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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109
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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110 instance = rev->instance;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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111
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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112 ngx_memzero(c, sizeof(ngx_connection_t));
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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113 ngx_memzero(rev, sizeof(ngx_event_t));
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114 ngx_memzero(wev, sizeof(ngx_event_t));
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115
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116 rev->index = wev->index = NGX_INVALID_INDEX;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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117 rev->data = wev->data = c;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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118 c->read = rev;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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119 c->write = wev;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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120
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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121 rev->instance = wev->instance = !instance;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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122
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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123 rev->log = wev->log = c->log = cn->log;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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124 c->fd = s;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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diff changeset
125 wev->close_handler = rev->close_handler = ngx_event_close_connection;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
126