| |
| /* |
| * Copyright (C) 2002-2004 Igor Sysoev, http://sysoev.ru/en/ |
| */ |
| |
| |
| #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 = -1; |
| 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) |
| { |
| size_t 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 ((size_t) 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; |
| |
| ngx_io = ngx_os_io; |
| |
| ngx_event_actions = ngx_devpoll_module_ctx.actions; |
| |
| ngx_event_flags = 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_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) |
| { |
| size_t 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 ((size_t) 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 ((size_t) 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, i, j; |
| size_t n; |
| ngx_msec_t timer; |
| ngx_err_t err; |
| ngx_cycle_t **cycle; |
| ngx_epoch_msec_t delta; |
| ngx_connection_t *c; |
| struct dvpoll dvp; |
| struct timeval tv; |
| |
| timer = ngx_event_find_timer(); |
| |
| if (timer) { |
| ngx_gettimeofday(&tv); |
| delta = tv.tv_sec * 1000 + tv.tv_usec / 1000; |
| |
| } else { |
| timer = (ngx_msec_t) INFTIM; |
| delta = 0; |
| } |
| |
| #if (NGX_DEBUG_EVENT) |
| ngx_log_debug(log, "devpoll timer: %d" _ timer); |
| #endif |
| |
| if (nchanges) { |
| n = nchanges * sizeof(struct pollfd); |
| if ((size_t) 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; |
| |
| ngx_gettimeofday(&tv); |
| |
| if (ngx_cached_time != tv.tv_sec) { |
| ngx_cached_time = tv.tv_sec; |
| ngx_time_update(); |
| } |
| |
| if ((int) timer != INFTIM) { |
| delta = tv.tv_sec * 1000 + tv.tv_usec / 1000 - delta; |
| |
| #if (NGX_DEBUG_EVENT) |
| ngx_log_debug(log, "devpoll timer: %d, delta: %d" _ timer _ (int)delta); |
| #endif |
| ngx_event_expire_timers((ngx_msec_t) delta); |
| |
| } else { |
| if (events == 0) { |
| ngx_log_error(NGX_LOG_ALERT, log, 0, |
| "ioctl(DP_POLL) returned no events without timeout"); |
| return NGX_ERROR; |
| } |
| |
| #if (NGX_DEBUG_EVENT) |
| ngx_log_debug(log, "devpoll timer: %d, delta: %d" _ timer _ (int)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; |
| } |
