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view src/event/modules/ngx_devpoll_module.c @ 36:c14d7232b11f
nginx-0.0.1-2002-12-23-09:29:22 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Mon, 23 Dec 2002 06:29:22 +0000 |
parents | |
children | 83fa61cd3d2f |
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/* * Copyright (C) 2002 Igor Sysoev, http://sysoev.ru */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_types.h> #include <ngx_log.h> #include <ngx_connection.h> #include <ngx_event.h> #include <ngx_devpoll_module.h> #if (USE_DEVPOLL) && !(HAVE_DEVPOLL) #error "/dev/poll is not supported on this platform" #endif /* should be per-thread */ static int dp; static struct pollfd *change_list, *event_list; static int nchanges, nevents; static ngx_event_t timer_queue; /* */ int ngx_devpoll_init(int max_connections, ngx_log_t *log) { int size; size = sizeof(struct pollfd) * 512; nchanges = 0; nevents = 512; dp = open("/dev/poll", O_RDWR); if (dp == -1) { ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "open(/dev/poll) failed"); return NGX_ERROR; } ngx_test_null(change_list, ngx_alloc(size, log), NGX_ERROR); ngx_test_null(event_list, ngx_alloc(size, log), NGX_ERROR); ngx_test_null(event_index, ngx_alloc(sizeof(ngx_event_t *) * nevents, log), NGX_ERROR); timer_queue.timer_prev = &timer_queue; timer_queue.timer_next = &timer_queue; #if !(USE_DEVPOLL) ngx_event_actions.add = ngx_devpoll_add_event; ngx_event_actions.del = ngx_devpoll_del_event; ngx_event_actions.timer = ngx_devpoll_add_timer; ngx_event_actions.process = ngx_devpoll_process_events; #endif return NGX_OK; } /* NOT READY */ int ngx_devpoll_add_event(ngx_event_t *ev, int event, u_int flags) { ngx_event_t *e; ngx_connection_t *c; c = (ngx_connection_t *) ev->data; ev->oneshot = (flags & NGX_ONESHOT_EVENT) ? 1: 0; if (event == NGX_READ_EVENT) { e = c->write; #if (NGX_READ_EVENT != POLLIN) event = POLLIN; #endif } else { e = c->read; #if (NGX_WRITE_EVENT != POLLOUT) event = POLLOUT; #endif } ngx_log_debug(ev->log, "poll fd:%d event:%d" _ c->fd _ event); if (e == NULL || e->index == NGX_INVALID_INDEX) { event_list[nevents].fd = c->fd; event_list[nevents].events = event; event_list[nevents].revents = 0; event_index[nevents] = ev; ev->index = nevents; nevents++; } else { event_list[e->index].events |= event; ev->index = e->index; } return ngx_devpoll_set_event(ev, event, EV_ADD | flags); } /* NOT READY */ int ngx_devpoll_del_event(ngx_event_t *ev, int event, u_int flags) { ngx_event_t *e; if (nchanges > 0 && ev->index < nchanges && change_list[ev->index].udata == ev) { ngx_connection_t *cn = (ngx_connection_t *) ev->data; ngx_log_debug(ev->log, "kqueue del event: %d: ft:%d" _ cn->fd _ event); if (ev->index < --nchanges) { e = (ngx_event_t *) change_list[nchanges].udata; change_list[ev->index] = change_list[nchanges]; e->index = ev->index; } return NGX_OK; } if (flags & NGX_CLOSE_EVENT) return NGX_OK; return ngx_devpoll_set_event(ev, POLLREMOVE); } /* NOT READY */ int ngx_devpoll_set_event(ngx_event_t *ev, int event) { int n; ngx_connection_t *c; c = (ngx_connection_t *) ev->data; ngx_log_debug(ev->log, "devpoll fd:%d event:%d" _ c->fd _ event); if (nchanges >= nevents) { ngx_log_error(NGX_LOG_WARN, ev->log, 0, "/dev/pool change list is filled up"); n = nchanges * sizeof(struct pollfd); if (write(dp, change_list, n) != n) { ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "write(/dev/poll) failed"); return NGX_ERROR; } nchanges = 0; } event_list[nchanges].fd = c->fd; event_list[nchanges].events = event; event_list[nchanges].revents = 0; event_index[nchanges] = ev; ev->index = nchanges; /* if (flags == EV_ADD) ev->index = nchanges; */ nchanges++; return NGX_OK; } int ngx_devpoll_process_events(ngx_log_t *log) { int events, i; u_int timer, delta; ngx_event_t *ev; struct dvpoll dvpoll; struct timeval tv; if (timer_queue.timer_next != &timer_queue) { timer = timer_queue.timer_next->timer_delta; #if 1 gettimeofday(&tv, NULL); delta = tv.tv_sec * 1000 + tv.tv_usec / 1000; #else delta = ngx_msec(); #endif } else { timer = INFTIM; delta = 0; } ngx_log_debug(log, "devpoll timer: %d" _ timer); n = nchanges * sizeof(struct pollfd); if (write(dp, change_list, n) != n) { ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "write(/dev/poll) failed"); return NGX_ERROR; } dvpoll.dp_fds = event_list; dvpoll.dp_nfds = nevents; dvpoll.dp_timeout = timer; events = ioctl(dp, DP_POLL, &dvpoll); if (events == -1) { ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "ioctl(DP_POLL) failed"); return NGX_ERROR; } nchanges = 0; if (timer != INFTIM) { #if 1 gettimeofday(&tv, NULL); delta = tv.tv_sec * 1000 + tv.tv_usec / 1000 - delta; #else delta = ngx_msec() - delta; #endif } else { ngx_assert((events != 0), return NGX_ERROR, log, "ioctl(DP_POLL) returns no events without timeout"); } ngx_log_debug(log, "devpoll timer: %d, delta: %d" _ timer _ delta); if (timer != INFTIM) { if (delta >= timer) { for ( ;; ) { ev = timer_queue.timer_next; if (ev == &timer_queue || delta < ev->timer_delta) break; delta -= ev->timer_delta; ngx_del_timer(ev); ev->timedout = 1; if (ev->event_handler(ev) == NGX_ERROR) ev->close_handler(ev); } } else { timer_queue.timer_next->timer_delta -= delta; } } for (i = 0; i < events; i++) { ngx_log_debug(log, "devpoll: %d: ev:%d rev:%d" _ event_list[i].fd _ event_list[i].events _ event_list[i].revents); if (event_list[i].revents & POLLIN) { c->read->ready = 1; if (c->read->oneshot) { ngx_del_timer(c->read); ngx_select_del_event(c->read, NGX_READ_EVENT, 0); } if (c->read->event_handler(c->read) == NGX_ERROR) { c->read->close_handler(c->read); } } if (event_list[i].revents & POLLOUT) { c->write->ready = 1; if (c->write->oneshot) { ngx_del_timer(c->write); ngx_select_del_event(c->write, NGX_WRITE_EVENT, 0); } if (c->write->event_handler(c->write) == NGX_ERROR) { c->write->close_handler(c->write); } } if (event_list[i].revents & (POLLERR|POLLHUP|POLLNVAL)) { ngx_log_error(NGX_LOG_ERR, log, ngx_errno, "ioctl(DP_POLL) error on %d:%d", event_list[i].fd, event_list[i].revents); } } return NGX_OK; } void ngx_devpoll_add_timer(ngx_event_t *ev, ngx_msec_t timer) { ngx_event_t *e; ngx_log_debug(ev->log, "set timer: %d" _ timer); ngx_assert((!ev->timer_next && !ev->timer_prev), return, ev->log, "timer already set"); for (e = timer_queue.timer_next; e != &timer_queue && timer > e->timer_delta; e = e->timer_next) timer -= e->timer_delta; ev->timer_delta = timer; ev->timer_next = e; ev->timer_prev = e->timer_prev; e->timer_prev->timer_next = ev; e->timer_prev = ev; }