Mercurial > hg > nginx-quic
view src/event/ngx_event_connect.c @ 120:b776ad95d96d
nginx-0.0.1-2003-07-21-20:24:25 import
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Mon, 21 Jul 2003 16:24:25 +0000 |
parents | cd54bcbaf3b5 |
children | b3655b21375a |
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#include <ngx_event_connect.h> int ngx_event_connect_peer(ngx_peer_connecttion_t *pc) { time_t now; /* TODO: cached connection */ now = ngx_time(); if (pc->peers->number > 1) { /* there are several peers */ if (pc->tries == pc->peers->number) { /* it's a first try - get a current peer */ /* Here is the race condition when the peers are shared between the threads or the processes but it should not be serious */ pc->cur_peer = pc->peers->current++; if (cp->peers->current >= cp->peers->number) { pc->peers->current = 0; } /* the end of the race condition */ #if (NGX_MULTITHREADED || NGX_MULTIPROCESSED) /* eliminate the sequences of the race condition */ if (pc->cur_peer >= pc->peers->number) { pc->cur_peer = 0; } #endif } if (pc->peers->max_fails > 0) { /* the peers support a fault tolerance */ for ( ;; ) { peer = &pc->peers->peers[pc->cur_peer]; /* Here is the race condition when the peers are shared between the threads or the processes but it should not be serious */ if (peer->fails <= pc->peers->max_fails || (now - peer->accessed > pc->peers->fail_timeout)) { break; } /* the end of the race condition */ pc->cur_peer++; if (pc->cur_peer >= pc->peers->number) { pc->cur_peer = 0; } pc->tries--; if (pc->tries == 0) { return NGX_ERROR; } } } } s = ngx_socket(AF_INET, SOCK_STREAM, IPPROTO_IP, 0); if (s == -1) { ngx_log_error(NGX_LOG_ALERT, cp->log, ngx_socket_errno, ngx_socket_n " failed"); return NGX_ERROR; } if (cp->rcvbuf) { if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, (const void *) &cp->rcvbuf, sizeof(int)) == -1) { ngx_log_error(NGX_LOG_ALERT, cp->log, ngx_socket_errno, "setsockopt(SO_RCVBUF) failed"); if (ngx_close_socket(s) == -1) { ngx_log_error(NGX_LOG_ALERT, cp->log, ngx_socket_errno, ngx_close_socket_n " failed"); } return NGX_ERROR; } } if (ngx_nonblocking(s) == -1) { ngx_log_error(NGX_LOG_ALERT, cn->log, ngx_socket_errno, ngx_nonblocking_n " failed"); if (ngx_close_socket(s) == -1) { ngx_log_error(NGX_LOG_ALERT, cn->log, ngx_socket_errno, ngx_close_socket_n " failed"); } return NGX_ERROR; } #if (WIN32) /* * Winsock assignes a socket number divisible by 4 * so to find a connection we divide a socket number by 4. */ if (s % 4) { ngx_log_error(NGX_LOG_EMERG, cp->log, 0, ngx_socket_n " created socket %d, not divisible by 4", s); exit(1); } c = &ngx_cycle->connections[s / 4]; rev = &ngx_cycle->read_events[s / 4]; wev = &ngx_cycle->write_events[s / 4]; #else c = &ngx_cycle->connections[s]; rev = &ngx_cycle->read_events[s]; wev = &ngx_cycle->write_events[s]; #endif instance = rev->instance; ngx_memzero(c, sizeof(ngx_connection_t)); ngx_memzero(rev, sizeof(ngx_event_t)); ngx_memzero(wev, sizeof(ngx_event_t)); rev->index = wev->index = NGX_INVALID_INDEX; rev->data = wev->data = c; c->read = rev; c->write = wev; rev->instance = wev->instance = !instance; !!!!!!!!!!!!!!! rev->log = wev->log = c->log = cn->log; c->fd = s; wev->close_handler = rev->close_handler = ngx_event_close_connection; }