Mercurial > hg > nginx
view src/event/modules/ngx_devpoll_module.c @ 116:571bcbff82c5
nginx-0.0.1-2003-07-11-08:50:59 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Fri, 11 Jul 2003 04:50:59 +0000 |
parents | be27f922b9a2 |
children | cd54bcbaf3b5 |
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/* * Copyright (C) 2002-2003 Igor Sysoev, http://sysoev.ru */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> #if (TEST_BUILD_DEVPOLL) /* Solaris declarations */ #define POLLREMOVE 0x0800 #define DP_POLL 0xD001 struct dvpoll { struct pollfd *dp_fds; int dp_nfds; int dp_timeout; }; #endif typedef struct { u_int changes; u_int events; } ngx_devpoll_conf_t; static int ngx_devpoll_init(ngx_cycle_t *cycle); static void ngx_devpoll_done(ngx_cycle_t *cycle); static int ngx_devpoll_add_event(ngx_event_t *ev, int event, u_int flags); static int ngx_devpoll_del_event(ngx_event_t *ev, int event, u_int flags); static int ngx_devpoll_set_event(ngx_event_t *ev, int event, u_int flags); static int ngx_devpoll_process_events(ngx_log_t *log); static void *ngx_devpoll_create_conf(ngx_cycle_t *cycle); static char *ngx_devpoll_init_conf(ngx_cycle_t *cycle, void *conf); static int dp; static struct pollfd *change_list, *event_list; static u_int nchanges, max_changes, nevents; static ngx_event_t **change_index; static ngx_str_t devpoll_name = ngx_string("/dev/poll"); static ngx_command_t ngx_devpoll_commands[] = { {ngx_string("devpoll_changes"), NGX_EVENT_CONF|NGX_CONF_TAKE1, ngx_conf_set_num_slot, 0, offsetof(ngx_devpoll_conf_t, changes), NULL}, {ngx_string("devpoll_events"), NGX_EVENT_CONF|NGX_CONF_TAKE1, ngx_conf_set_num_slot, 0, offsetof(ngx_devpoll_conf_t, events), NULL}, ngx_null_command }; ngx_event_module_t ngx_devpoll_module_ctx = { &devpoll_name, ngx_devpoll_create_conf, /* create configuration */ ngx_devpoll_init_conf, /* init configuration */ { ngx_devpoll_add_event, /* add an event */ ngx_devpoll_del_event, /* delete an event */ ngx_devpoll_add_event, /* enable an event */ ngx_devpoll_del_event, /* disable an event */ NULL, /* add an connection */ NULL, /* delete an connection */ ngx_devpoll_process_events, /* process the events */ ngx_devpoll_init, /* init the events */ ngx_devpoll_done, /* done the events */ } }; ngx_module_t ngx_devpoll_module = { NGX_MODULE, &ngx_devpoll_module_ctx, /* module context */ ngx_devpoll_commands, /* module directives */ NGX_EVENT_MODULE, /* module type */ NULL, /* init module */ NULL /* init child */ }; static int ngx_devpoll_init(ngx_cycle_t *cycle) { int n; ngx_devpoll_conf_t *dpcf; dpcf = ngx_event_get_conf(cycle->conf_ctx, ngx_devpoll_module); ngx_log_debug(cycle->log, "CH: %d" _ dpcf->changes); ngx_log_debug(cycle->log, "EV: %d" _ dpcf->events); if (dp == -1) { dp = open("/dev/poll", O_RDWR); if (dp == -1) { ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, "open(/dev/poll) failed"); return NGX_ERROR; } } if (max_changes < dpcf->changes) { if (nchanges) { n = nchanges * sizeof(struct pollfd); if (write(dp, change_list, n) != n) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, "write(/dev/poll) failed"); return NGX_ERROR; } nchanges = 0; } if (change_list) { ngx_free(change_list); } ngx_test_null(change_list, ngx_alloc(sizeof(struct pollfd) * dpcf->changes, cycle->log), NGX_ERROR); if (change_index) { ngx_free(change_index); } ngx_test_null(change_index, ngx_alloc(sizeof(ngx_event_t *) * dpcf->changes, cycle->log), NGX_ERROR); } max_changes = dpcf->changes; if (nevents < dpcf->events) { if (event_list) { ngx_free(event_list); } ngx_test_null(event_list, ngx_alloc(sizeof(struct pollfd) * dpcf->events, cycle->log), NGX_ERROR); } nevents = dpcf->events; if (ngx_event_timer_init(cycle) == NGX_ERROR) { return NGX_ERROR; } ngx_io = ngx_os_io; ngx_event_actions = ngx_devpoll_module_ctx.actions; ngx_event_flags = NGX_HAVE_LEVEL_EVENT|NGX_USE_LEVEL_EVENT; return NGX_OK; } static void ngx_devpoll_done(ngx_cycle_t *cycle) { if (close(dp) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, "close(/dev/poll) failed"); } dp = -1; ngx_event_timer_done(cycle); ngx_free(change_list); ngx_free(event_list); ngx_free(change_index); change_list = NULL; event_list = NULL; change_index = NULL; max_changes = 0; nchanges = 0; nevents = 0; } static int ngx_devpoll_add_event(ngx_event_t *ev, int event, u_int flags) { #if (NGX_DEBUG_EVENT) ngx_connection_t *c = (ngx_connection_t *) ev->data; #endif #if (NGX_READ_EVENT != POLLIN) if (event == NGX_READ_EVENT) { event = POLLOUT; #if (NGX_WRITE_EVENT != POLLOUT) } else { event = POLLIN; #endif } #endif #if (NGX_DEBUG_EVENT) c = (ngx_connection_t *) ev->data; ngx_log_debug(ev->log, "add event: %d:%d" _ c->fd _ event); #endif ev->active = 1; return ngx_devpoll_set_event(ev, event, 0); } static int ngx_devpoll_del_event(ngx_event_t *ev, int event, u_int flags) { ngx_event_t *e; ngx_connection_t *c; c = ev->data; #if (NGX_DEBUG_EVENT) ngx_log_debug(c->log, "del event: %d, %d" _ c->fd _ event); #endif if (ngx_devpoll_set_event(ev, POLLREMOVE, flags) == NGX_ERROR) { return NGX_ERROR; } ev->active = 0; if (flags & NGX_CLOSE_EVENT) { return NGX_OK; } /* we need to restore the second event if it exists */ if (event == NGX_READ_EVENT) { e = c->write; event = POLLOUT; } else { e = c->read; event = POLLIN; } if (e) { return ngx_devpoll_set_event(e, event, 0); } return NGX_OK; } static int ngx_devpoll_set_event(ngx_event_t *ev, int event, u_int flags) { int n; ngx_connection_t *c; c = ev->data; #if (NGX_DEBUG_EVENT) ngx_log_debug(ev->log, "devpoll fd:%d event:%d flush:%d" _ c->fd _ event _ flags); #endif if (nchanges >= max_changes) { 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, ev->log, ngx_errno, "write(/dev/poll) failed"); return NGX_ERROR; } nchanges = 0; } change_list[nchanges].fd = c->fd; change_list[nchanges].events = event; change_list[nchanges].revents = 0; change_index[nchanges] = ev; ev->index = nchanges; nchanges++; if (flags & NGX_CLOSE_EVENT) { n = nchanges * sizeof(struct pollfd); if (write(dp, change_list, n) != n) { ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, "write(/dev/poll) failed"); return NGX_ERROR; } nchanges = 0; } return NGX_OK; } int ngx_devpoll_process_events(ngx_log_t *log) { int events, n, i, j; ngx_msec_t timer, delta; ngx_err_t err; ngx_cycle_t **cycle; ngx_connection_t *c; struct dvpoll dvp; struct timeval tv; timer = ngx_event_find_timer(); if (timer) { gettimeofday(&tv, NULL); delta = tv.tv_sec * 1000 + tv.tv_usec / 1000; } else { timer = INFTIM; delta = 0; } #if (NGX_DEBUG_EVENT) ngx_log_debug(log, "devpoll timer: %d" _ timer); #endif if (nchanges) { 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; } } dvp.dp_fds = event_list; dvp.dp_nfds = nevents; dvp.dp_timeout = timer; events = ioctl(dp, DP_POLL, &dvp); if (events == -1) { err = ngx_errno; } else { err = 0; } nchanges = 0; if ((int) timer != INFTIM) { gettimeofday(&tv, NULL); delta = tv.tv_sec * 1000 + tv.tv_usec / 1000 - delta; #if (NGX_DEBUG_EVENT) ngx_log_debug(log, "devpoll timer: %d, delta: %d" _ timer _ delta); #endif ngx_event_expire_timers(delta); } else { if (events == 0) { ngx_log_error(NGX_LOG_ALERT, log, 0, "ioctl(DP_POLL) returns no events without timeout"); return NGX_ERROR; } #if (NGX_DEBUG_EVENT) ngx_log_debug(log, "devpoll timer: %d, delta: %d" _ timer _ delta); #endif } if (err) { ngx_log_error(NGX_LOG_ALERT, log, err, "ioctl(DP_POLL) failed"); return NGX_ERROR; } for (i = 0; i < events; i++) { c = &ngx_cycle->connections[event_list[i].fd]; if (c->fd == -1) { cycle = ngx_old_cycles.elts; for (j = 0; j < ngx_old_cycles.nelts; j++) { if (cycle[i] == NULL) { continue; } c = &cycle[j]->connections[event_list[i].fd]; if (c->fd != -1) { break; } } } if (c->fd == -1) { ngx_log_error(NGX_LOG_ALERT, log, 0, "unkonwn cycle"); exit(1); } #if (NGX_DEBUG_EVENT) ngx_log_debug(log, "devpoll: %d: ev:%d rev:%d" _ event_list[i].fd _ event_list[i].events _ event_list[i].revents); #endif if (event_list[i].revents & POLLIN) { if (!c->read->active) { continue; } c->read->ready = 1; c->read->event_handler(c->read); } if (event_list[i].revents & POLLOUT) { if (!c->write->active) { continue; } c->write->ready = 1; c->write->event_handler(c->write); } if (event_list[i].revents & (POLLERR|POLLHUP|POLLNVAL)) { err = 0; if (event_list[i].revents & POLLNVAL) { err = EBADF; } ngx_log_error(NGX_LOG_ERR, log, err, "ioctl(DP_POLL) error on %d:%d", event_list[i].fd, event_list[i].revents); } } return NGX_OK; } static void *ngx_devpoll_create_conf(ngx_cycle_t *cycle) { ngx_devpoll_conf_t *dpcf; ngx_test_null(dpcf, ngx_palloc(cycle->pool, sizeof(ngx_devpoll_conf_t)), NGX_CONF_ERROR); dpcf->changes = NGX_CONF_UNSET; dpcf->events = NGX_CONF_UNSET; return dpcf; } static char *ngx_devpoll_init_conf(ngx_cycle_t *cycle, void *conf) { ngx_devpoll_conf_t *dpcf = conf; ngx_conf_init_unsigned_value(dpcf->changes, 512); ngx_conf_init_unsigned_value(dpcf->events, 512); return NGX_CONF_OK; }