| |
| /* |
| * Copyright (C) 2002-2003 Igor Sysoev, http://sysoev.ru |
| */ |
| |
| |
| #include <ngx_config.h> |
| #include <ngx_core.h> |
| #include <ngx_event.h> |
| #include <ngx_kqueue_module.h> |
| |
| |
| typedef struct { |
| u_int changes; |
| u_int events; |
| } ngx_kqueue_conf_t; |
| |
| |
| static int ngx_kqueue_init(ngx_cycle_t *cycle); |
| static void ngx_kqueue_done(ngx_cycle_t *cycle); |
| static int ngx_kqueue_add_event(ngx_event_t *ev, int event, u_int flags); |
| static int ngx_kqueue_del_event(ngx_event_t *ev, int event, u_int flags); |
| static int ngx_kqueue_set_event(ngx_event_t *ev, int filter, u_int flags); |
| static int ngx_kqueue_process_events(ngx_log_t *log); |
| |
| static void *ngx_kqueue_create_conf(ngx_cycle_t *cycle); |
| static char *ngx_kqueue_init_conf(ngx_cycle_t *cycle, void *conf); |
| |
| |
| int ngx_kqueue = -1; |
| |
| static struct kevent *change_list, *event_list; |
| static u_int max_changes, nchanges, nevents; |
| |
| |
| static ngx_str_t kqueue_name = ngx_string("kqueue"); |
| |
| static ngx_command_t ngx_kqueue_commands[] = { |
| |
| {ngx_string("kqueue_changes"), |
| NGX_EVENT_CONF|NGX_CONF_TAKE1, |
| ngx_conf_set_num_slot, |
| 0, |
| offsetof(ngx_kqueue_conf_t, changes), |
| NULL}, |
| |
| {ngx_string("kqueue_events"), |
| NGX_EVENT_CONF|NGX_CONF_TAKE1, |
| ngx_conf_set_num_slot, |
| 0, |
| offsetof(ngx_kqueue_conf_t, events), |
| NULL}, |
| |
| ngx_null_command |
| }; |
| |
| |
| ngx_event_module_t ngx_kqueue_module_ctx = { |
| &kqueue_name, |
| ngx_kqueue_create_conf, /* create configuration */ |
| ngx_kqueue_init_conf, /* init configuration */ |
| |
| { |
| ngx_kqueue_add_event, /* add an event */ |
| ngx_kqueue_del_event, /* delete an event */ |
| ngx_kqueue_add_event, /* enable an event */ |
| ngx_kqueue_del_event, /* disable an event */ |
| NULL, /* add an connection */ |
| NULL, /* delete an connection */ |
| ngx_kqueue_process_events, /* process the events */ |
| ngx_kqueue_init, /* init the events */ |
| ngx_kqueue_done /* done the events */ |
| } |
| |
| }; |
| |
| ngx_module_t ngx_kqueue_module = { |
| NGX_MODULE, |
| &ngx_kqueue_module_ctx, /* module context */ |
| ngx_kqueue_commands, /* module directives */ |
| NGX_EVENT_MODULE, /* module type */ |
| NULL, /* init module */ |
| NULL /* init child */ |
| }; |
| |
| |
| |
| static int ngx_kqueue_init(ngx_cycle_t *cycle) |
| { |
| struct timespec ts; |
| ngx_kqueue_conf_t *kcf; |
| |
| kcf = ngx_event_get_conf(cycle->conf_ctx, ngx_kqueue_module); |
| |
| ngx_log_debug(cycle->log, "CH: %d" _ kcf->changes); |
| ngx_log_debug(cycle->log, "EV: %d" _ kcf->events); |
| |
| if (ngx_kqueue == -1) { |
| ngx_kqueue = kqueue(); |
| |
| if (ngx_kqueue == -1) { |
| ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, |
| "kqueue() failed"); |
| return NGX_ERROR; |
| } |
| } |
| |
| if (max_changes < kcf->changes) { |
| if (nchanges) { |
| ts.tv_sec = 0; |
| ts.tv_nsec = 0; |
| |
| if (kevent(ngx_kqueue, change_list, nchanges, NULL, 0, &ts) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "kevent() failed"); |
| return NGX_ERROR; |
| } |
| nchanges = 0; |
| } |
| |
| if (change_list) { |
| ngx_free(change_list); |
| } |
| |
| ngx_test_null(change_list, |
| ngx_alloc(kcf->changes * sizeof(struct kevent), |
| cycle->log), |
| NGX_ERROR); |
| } |
| |
| max_changes = kcf->changes; |
| |
| if (nevents < kcf->events) { |
| if (event_list) { |
| ngx_free(event_list); |
| } |
| |
| ngx_test_null(event_list, |
| ngx_alloc(kcf->events * sizeof(struct kevent), |
| cycle->log), |
| NGX_ERROR); |
| } |
| |
| nevents = kcf->events; |
| |
| if (ngx_event_timer_init(cycle) == NGX_ERROR) { |
| return NGX_ERROR; |
| } |
| |
| ngx_io = ngx_os_io; |
| |
| ngx_event_actions = ngx_kqueue_module_ctx.actions; |
| |
| ngx_event_flags = NGX_USE_ONESHOT_EVENT |
| #if (HAVE_CLEAR_EVENT) |
| |NGX_USE_CLEAR_EVENT |
| #else |
| |NGX_USE_LEVEL_EVENT |
| #endif |
| #if (HAVE_LOWAT_EVENT) |
| |NGX_HAVE_LOWAT_EVENT |
| #endif |
| |NGX_HAVE_KQUEUE_EVENT; |
| |
| return NGX_OK; |
| } |
| |
| |
| static void ngx_kqueue_done(ngx_cycle_t *cycle) |
| { |
| if (close(ngx_kqueue) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "kqueue close() failed"); |
| } |
| |
| ngx_kqueue = -1; |
| |
| ngx_event_timer_done(cycle); |
| |
| ngx_free(change_list); |
| ngx_free(event_list); |
| |
| change_list = NULL; |
| event_list = NULL; |
| max_changes = 0; |
| nchanges = 0; |
| nevents = 0; |
| } |
| |
| |
| static int ngx_kqueue_add_event(ngx_event_t *ev, int event, u_int flags) |
| { |
| ngx_connection_t *c; |
| |
| ev->active = 1; |
| ev->oneshot = (flags & NGX_ONESHOT_EVENT) ? 1 : 0; |
| |
| if (nchanges > 0 |
| && ev->index < nchanges |
| && (void *) ((uintptr_t) change_list[ev->index].udata & ~1) == ev) |
| { |
| c = ev->data; |
| ngx_log_error(NGX_LOG_ALERT, ev->log, 0, |
| "previous event were not passed in kernel", c->fd); |
| |
| return NGX_ERROR; |
| } |
| |
| return ngx_kqueue_set_event(ev, event, EV_ADD | flags); |
| } |
| |
| |
| static int ngx_kqueue_del_event(ngx_event_t *ev, int event, u_int flags) |
| { |
| ngx_event_t *e; |
| |
| ev->active = 0; |
| |
| if (nchanges > 0 |
| && ev->index < nchanges |
| && (void *) ((uintptr_t) change_list[ev->index].udata & ~1) == ev) |
| { |
| #if (NGX_DEBUG_EVENT) |
| ngx_connection_t *c = (ngx_connection_t *) ev->data; |
| ngx_log_debug(ev->log, "kqueue event deleted: %d: ft:%d" _ |
| c->fd _ event); |
| #endif |
| |
| /* if the event is still not passed to a kernel we will not pass it */ |
| |
| 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; |
| } |
| |
| /* |
| * when the file descriptor is closed a kqueue automatically deletes |
| * its filters so we do not need to delete explicity the event |
| * before the closing the file descriptor. |
| */ |
| |
| if (flags & NGX_CLOSE_EVENT) { |
| return NGX_OK; |
| } |
| |
| return ngx_kqueue_set_event(ev, event, EV_DELETE); |
| } |
| |
| |
| static int ngx_kqueue_set_event(ngx_event_t *ev, int filter, u_int flags) |
| { |
| struct timespec ts; |
| ngx_connection_t *c; |
| |
| c = ev->data; |
| |
| #if (NGX_DEBUG_EVENT) |
| ngx_log_debug(ev->log, "kqueue set event: %d: ft:%d fl:%08x" _ |
| c->fd _ filter _ flags); |
| #endif |
| |
| if (nchanges >= max_changes) { |
| ngx_log_error(NGX_LOG_WARN, ev->log, 0, |
| "kqueue change list is filled up"); |
| |
| ts.tv_sec = 0; |
| ts.tv_nsec = 0; |
| |
| if (kevent(ngx_kqueue, change_list, nchanges, NULL, 0, &ts) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, "kevent() failed"); |
| return NGX_ERROR; |
| } |
| |
| nchanges = 0; |
| } |
| |
| change_list[nchanges].ident = c->fd; |
| change_list[nchanges].filter = filter; |
| change_list[nchanges].flags = flags; |
| change_list[nchanges].udata = (void *) ((uintptr_t) ev | ev->instance); |
| |
| #if (HAVE_LOWAT_EVENT) |
| |
| if ((flags & EV_ADD) && ev->lowat > 0) { |
| change_list[nchanges].fflags = NOTE_LOWAT; |
| change_list[nchanges].data = ev->lowat; |
| |
| } else { |
| change_list[nchanges].fflags = 0; |
| change_list[nchanges].data = 0; |
| } |
| |
| #else |
| |
| change_list[nchanges].fflags = 0; |
| change_list[nchanges].data = 0; |
| |
| #endif |
| |
| ev->index = nchanges; |
| |
| nchanges++; |
| |
| return NGX_OK; |
| } |
| |
| |
| static int ngx_kqueue_process_events(ngx_log_t *log) |
| { |
| int events, instance, i; |
| ngx_err_t err; |
| ngx_msec_t timer, delta; |
| ngx_event_t *ev; |
| struct timeval tv; |
| struct timespec ts, *tp; |
| |
| timer = ngx_event_find_timer(); |
| |
| if (timer) { |
| ts.tv_sec = timer / 1000; |
| ts.tv_nsec = (timer % 1000) * 1000000; |
| tp = &ts; |
| gettimeofday(&tv, NULL); |
| delta = tv.tv_sec * 1000 + tv.tv_usec / 1000; |
| |
| } else { |
| timer = 0; |
| delta = 0; |
| tp = NULL; |
| } |
| |
| #if (NGX_DEBUG_EVENT) |
| ngx_log_debug(log, "kevent timer: %d" _ timer); |
| #endif |
| |
| events = kevent(ngx_kqueue, change_list, nchanges, event_list, nevents, tp); |
| |
| if (events == -1) { |
| err = ngx_errno; |
| } else { |
| err = 0; |
| } |
| |
| nchanges = 0; |
| |
| if (timer) { |
| gettimeofday(&tv, NULL); |
| delta = tv.tv_sec * 1000 + tv.tv_usec / 1000 - delta; |
| |
| #if (NGX_DEBUG_EVENT) |
| ngx_log_debug(log, "kevent timer: %d, delta: %d" _ timer _ delta); |
| #endif |
| |
| /* The expired timers must be handled before a processing of the events |
| because the new timers can be added during a processing */ |
| |
| ngx_event_expire_timers(delta); |
| |
| } else { |
| if (events == 0) { |
| ngx_log_error(NGX_LOG_ALERT, log, 0, |
| "kevent() returned no events without timeout"); |
| return NGX_ERROR; |
| } |
| |
| #if (NGX_DEBUG_EVENT) |
| ngx_log_debug(log, "kevent timer: %d, delta: %d" _ timer _ delta); |
| #endif |
| } |
| |
| if (err) { |
| ngx_log_error(NGX_LOG_ALERT, log, err, "kevent() failed"); |
| return NGX_ERROR; |
| } |
| |
| for (i = 0; i < events; i++) { |
| |
| #if (NGX_DEBUG_EVENT) |
| if (event_list[i].ident > 0x8000000) { |
| ngx_log_debug(log, |
| "kevent: %08x: ft:%d fl:%08x ff:%08x d:%d ud:%08x" _ |
| event_list[i].ident _ event_list[i].filter _ |
| event_list[i].flags _ event_list[i].fflags _ |
| event_list[i].data _ event_list[i].udata); |
| } else { |
| ngx_log_debug(log, |
| "kevent: %d: ft:%d fl:%08x ff:%08x d:%d ud:%08x" _ |
| event_list[i].ident _ event_list[i].filter _ |
| event_list[i].flags _ event_list[i].fflags _ |
| event_list[i].data _ event_list[i].udata); |
| } |
| #endif |
| |
| if (event_list[i].flags & EV_ERROR) { |
| ngx_log_error(NGX_LOG_ALERT, log, event_list[i].data, |
| "kevent() error on %d", event_list[i].ident); |
| continue; |
| } |
| |
| ev = (ngx_event_t *) event_list[i].udata; |
| |
| switch (event_list[i].filter) { |
| |
| case EVFILT_READ: |
| case EVFILT_WRITE: |
| |
| instance = (uintptr_t) ev & 1; |
| ev = (void *) ((uintptr_t) ev & ~1); |
| |
| /* It's a stale event from a file descriptor |
| that was just closed in this iteration */ |
| |
| if (ev->active == 0 || ev->instance != instance) { |
| ngx_log_debug(log, "stale kevent"); |
| continue; |
| } |
| |
| ev->available = event_list[i].data; |
| |
| if (event_list[i].flags & EV_EOF) { |
| ev->eof = 1; |
| ev->error = event_list[i].fflags; |
| } |
| |
| if (ev->oneshot && ev->timer_set) { |
| ngx_del_timer(ev); |
| } |
| |
| ev->ready = 1; |
| |
| ev->event_handler(ev); |
| |
| break; |
| |
| case EVFILT_AIO: |
| ev->ready = 1; |
| ev->active = 0; |
| |
| ev->event_handler(ev); |
| |
| break; |
| |
| |
| default: |
| ngx_log_error(NGX_LOG_ALERT, log, 0, |
| "unknown kevent filter %d" _ event_list[i].filter); |
| } |
| } |
| |
| return NGX_OK; |
| } |
| |
| |
| static void *ngx_kqueue_create_conf(ngx_cycle_t *cycle) |
| { |
| ngx_kqueue_conf_t *kcf; |
| |
| ngx_test_null(kcf, ngx_palloc(cycle->pool, sizeof(ngx_kqueue_conf_t)), |
| NGX_CONF_ERROR); |
| |
| kcf->changes = NGX_CONF_UNSET; |
| kcf->events = NGX_CONF_UNSET; |
| |
| return kcf; |
| } |
| |
| |
| static char *ngx_kqueue_init_conf(ngx_cycle_t *cycle, void *conf) |
| { |
| ngx_kqueue_conf_t *kcf = conf; |
| |
| ngx_conf_init_unsigned_value(kcf->changes, 512); |
| ngx_conf_init_unsigned_value(kcf->events, 512); |
| |
| return NGX_CONF_OK; |
| } |
