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src/event/modules/ngx_kqueue_module.c - nginx-1.7.10
Global variables defined
Data types defined
Functions defined
Source code
- #include <ngx_config.h>
- #include <ngx_core.h>
- #include <ngx_event.h>
- typedef struct {
- ngx_uint_t changes;
- ngx_uint_t events;
- } ngx_kqueue_conf_t;
- static ngx_int_t ngx_kqueue_init(ngx_cycle_t *cycle, ngx_msec_t timer);
- static void ngx_kqueue_done(ngx_cycle_t *cycle);
- static ngx_int_t ngx_kqueue_add_event(ngx_event_t *ev, ngx_int_t event,
- ngx_uint_t flags);
- static ngx_int_t ngx_kqueue_del_event(ngx_event_t *ev, ngx_int_t event,
- ngx_uint_t flags);
- static ngx_int_t ngx_kqueue_set_event(ngx_event_t *ev, ngx_int_t filter,
- ngx_uint_t flags);
- static ngx_int_t ngx_kqueue_process_changes(ngx_cycle_t *cycle, ngx_uint_t try);
- static ngx_int_t ngx_kqueue_process_events(ngx_cycle_t *cycle, ngx_msec_t timer,
- ngx_uint_t flags);
- static ngx_inline void ngx_kqueue_dump_event(ngx_log_t *log,
- struct kevent *kev);
- 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, *change_list0, *change_list1;
- static struct kevent *event_list;
- static ngx_uint_t max_changes, nchanges, nevents;
- #if (NGX_THREADS)
- static ngx_mutex_t *list_mutex;
- static ngx_mutex_t *kevent_mutex;
- #endif
- 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,
- ngx_kqueue_init_conf,
- {
- ngx_kqueue_add_event,
- ngx_kqueue_del_event,
- ngx_kqueue_add_event,
- ngx_kqueue_del_event,
- NULL,
- NULL,
- ngx_kqueue_process_changes,
- ngx_kqueue_process_events,
- ngx_kqueue_init,
- ngx_kqueue_done
- }
- };
- ngx_module_t ngx_kqueue_module = {
- NGX_MODULE_V1,
- &ngx_kqueue_module_ctx,
- ngx_kqueue_commands,
- NGX_EVENT_MODULE,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NGX_MODULE_V1_PADDING
- };
- static ngx_int_t
- ngx_kqueue_init(ngx_cycle_t *cycle, ngx_msec_t timer)
- {
- ngx_kqueue_conf_t *kcf;
- struct timespec ts;
- #if (NGX_HAVE_TIMER_EVENT)
- struct kevent kev;
- #endif
- kcf = ngx_event_get_conf(cycle->conf_ctx, ngx_kqueue_module);
- 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 (NGX_THREADS)
- list_mutex = ngx_mutex_init(cycle->log, 0);
- if (list_mutex == NULL) {
- return NGX_ERROR;
- }
- kevent_mutex = ngx_mutex_init(cycle->log, 0);
- if (kevent_mutex == NULL) {
- return NGX_ERROR;
- }
- #endif
- }
- if (max_changes < kcf->changes) {
- if (nchanges) {
- ts.tv_sec = 0;
- ts.tv_nsec = 0;
- if (kevent(ngx_kqueue, change_list, (int) nchanges, NULL, 0, &ts)
- == -1)
- {
- ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
- "kevent() failed");
- return NGX_ERROR;
- }
- nchanges = 0;
- }
- if (change_list0) {
- ngx_free(change_list0);
- }
- change_list0 = ngx_alloc(kcf->changes * sizeof(struct kevent),
- cycle->log);
- if (change_list0 == NULL) {
- return NGX_ERROR;
- }
- if (change_list1) {
- ngx_free(change_list1);
- }
- change_list1 = ngx_alloc(kcf->changes * sizeof(struct kevent),
- cycle->log);
- if (change_list1 == NULL) {
- return NGX_ERROR;
- }
- change_list = change_list0;
- }
- max_changes = kcf->changes;
- if (nevents < kcf->events) {
- if (event_list) {
- ngx_free(event_list);
- }
- event_list = ngx_alloc(kcf->events * sizeof(struct kevent), cycle->log);
- if (event_list == NULL) {
- return NGX_ERROR;
- }
- }
- ngx_event_flags = NGX_USE_ONESHOT_EVENT
- |NGX_USE_KQUEUE_EVENT
- |NGX_USE_VNODE_EVENT;
- #if (NGX_HAVE_TIMER_EVENT)
- if (timer) {
- kev.ident = 0;
- kev.filter = EVFILT_TIMER;
- kev.flags = EV_ADD|EV_ENABLE;
- kev.fflags = 0;
- kev.data = timer;
- kev.udata = 0;
- ts.tv_sec = 0;
- ts.tv_nsec = 0;
- if (kevent(ngx_kqueue, &kev, 1, NULL, 0, &ts) == -1) {
- ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
- "kevent(EVFILT_TIMER) failed");
- return NGX_ERROR;
- }
- ngx_event_flags |= NGX_USE_TIMER_EVENT;
- }
- #endif
- #if (NGX_HAVE_CLEAR_EVENT)
- ngx_event_flags |= NGX_USE_CLEAR_EVENT;
- #else
- ngx_event_flags |= NGX_USE_LEVEL_EVENT;
- #endif
- #if (NGX_HAVE_LOWAT_EVENT)
- ngx_event_flags |= NGX_USE_LOWAT_EVENT;
- #endif
- nevents = kcf->events;
- ngx_io = ngx_os_io;
- ngx_event_actions = ngx_kqueue_module_ctx.actions;
- 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;
- #if (NGX_THREADS)
- ngx_mutex_destroy(kevent_mutex);
- ngx_mutex_destroy(list_mutex);
- #endif
- ngx_free(change_list1);
- ngx_free(change_list0);
- ngx_free(event_list);
- change_list1 = NULL;
- change_list0 = NULL;
- change_list = NULL;
- event_list = NULL;
- max_changes = 0;
- nchanges = 0;
- nevents = 0;
- }
- static ngx_int_t
- ngx_kqueue_add_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags)
- {
- ngx_int_t rc;
- #if 0
- #endif
- ev->active = 1;
- ev->disabled = 0;
- ev->oneshot = (flags & NGX_ONESHOT_EVENT) ? 1 : 0;
- ngx_mutex_lock(list_mutex);
- #if 0
- #endif
- rc = ngx_kqueue_set_event(ev, event, EV_ADD|EV_ENABLE|flags);
- ngx_mutex_unlock(list_mutex);
- return rc;
- }
- static ngx_int_t
- ngx_kqueue_del_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags)
- {
- ngx_int_t rc;
- ngx_event_t *e;
- ev->active = 0;
- ev->disabled = 0;
- ngx_mutex_lock(list_mutex);
- if (ev->index < nchanges
- && ((uintptr_t) change_list[ev->index].udata & (uintptr_t) ~1)
- == (uintptr_t) ev)
- {
- ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
- "kevent deleted: %d: ft:%i",
- ngx_event_ident(ev->data), event);
-
- nchanges--;
- if (ev->index < nchanges) {
- e = (ngx_event_t *)
- ((uintptr_t) change_list[nchanges].udata & (uintptr_t) ~1);
- change_list[ev->index] = change_list[nchanges];
- e->index = ev->index;
- }
- ngx_mutex_unlock(list_mutex);
- return NGX_OK;
- }
-
- if (flags & NGX_CLOSE_EVENT) {
- ngx_mutex_unlock(list_mutex);
- return NGX_OK;
- }
- if (flags & NGX_DISABLE_EVENT) {
- ev->disabled = 1;
- } else {
- flags |= EV_DELETE;
- }
- rc = ngx_kqueue_set_event(ev, event, flags);
- ngx_mutex_unlock(list_mutex);
- return rc;
- }
- static ngx_int_t
- ngx_kqueue_set_event(ngx_event_t *ev, ngx_int_t filter, ngx_uint_t flags)
- {
- struct kevent *kev;
- struct timespec ts;
- ngx_connection_t *c;
- c = ev->data;
- ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
- "kevent set event: %d: ft:%i fl:%04Xi",
- c->fd, filter, flags);
- 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, (int) nchanges, NULL, 0, &ts)
- == -1)
- {
- ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, "kevent() failed");
- return NGX_ERROR;
- }
- nchanges = 0;
- }
- kev = &change_list[nchanges];
- kev->ident = c->fd;
- kev->filter = (short) filter;
- kev->flags = (u_short) flags;
- kev->udata = NGX_KQUEUE_UDATA_T ((uintptr_t) ev | ev->instance);
- if (filter == EVFILT_VNODE) {
- kev->fflags = NOTE_DELETE|NOTE_WRITE|NOTE_EXTEND
- |NOTE_ATTRIB|NOTE_RENAME
- #if (__FreeBSD__ == 4 && __FreeBSD_version >= 430000) \
- || __FreeBSD_version >= 500018
- |NOTE_REVOKE
- #endif
- ;
- kev->data = 0;
- } else {
- #if (NGX_HAVE_LOWAT_EVENT)
- if (flags & NGX_LOWAT_EVENT) {
- kev->fflags = NOTE_LOWAT;
- kev->data = ev->available;
- } else {
- kev->fflags = 0;
- kev->data = 0;
- }
- #else
- kev->fflags = 0;
- kev->data = 0;
- #endif
- }
- ev->index = nchanges;
- nchanges++;
- if (flags & NGX_FLUSH_EVENT) {
- ts.tv_sec = 0;
- ts.tv_nsec = 0;
- ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ev->log, 0, "kevent flush");
- if (kevent(ngx_kqueue, change_list, (int) nchanges, NULL, 0, &ts)
- == -1)
- {
- ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, "kevent() failed");
- return NGX_ERROR;
- }
- nchanges = 0;
- }
- return NGX_OK;
- }
- static ngx_int_t
- ngx_kqueue_process_events(ngx_cycle_t *cycle, ngx_msec_t timer,
- ngx_uint_t flags)
- {
- int events, n;
- ngx_int_t i, instance;
- ngx_uint_t level;
- ngx_err_t err;
- ngx_event_t *ev;
- ngx_queue_t *queue;
- struct timespec ts, *tp;
- if (ngx_threaded) {
- if (ngx_kqueue_process_changes(cycle, 0) == NGX_ERROR) {
- return NGX_ERROR;
- }
- n = 0;
- } else {
- n = (int) nchanges;
- nchanges = 0;
- }
- if (timer == NGX_TIMER_INFINITE) {
- tp = NULL;
- } else {
- ts.tv_sec = timer / 1000;
- ts.tv_nsec = (timer % 1000) * 1000000;
-
- #if (NGX_DARWIN_KEVENT_BUG)
- ts.tv_nsec <<= 32;
- #endif
- tp = &ts;
- }
- ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
- "kevent timer: %M, changes: %d", timer, n);
- events = kevent(ngx_kqueue, change_list, n, event_list, (int) nevents, tp);
- err = (events == -1) ? ngx_errno : 0;
- if (flags & NGX_UPDATE_TIME || ngx_event_timer_alarm) {
- ngx_time_update();
- }
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
- "kevent events: %d", events);
- if (err) {
- if (err == NGX_EINTR) {
- if (ngx_event_timer_alarm) {
- ngx_event_timer_alarm = 0;
- return NGX_OK;
- }
- level = NGX_LOG_INFO;
- } else {
- level = NGX_LOG_ALERT;
- }
- ngx_log_error(level, cycle->log, err, "kevent() failed");
- return NGX_ERROR;
- }
- if (events == 0) {
- if (timer != NGX_TIMER_INFINITE) {
- return NGX_OK;
- }
- ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
- "kevent() returned no events without timeout");
- return NGX_ERROR;
- }
- for (i = 0; i < events; i++) {
- ngx_kqueue_dump_event(cycle->log, &event_list[i]);
- if (event_list[i].flags & EV_ERROR) {
- ngx_log_error(NGX_LOG_ALERT, cycle->log, event_list[i].data,
- "kevent() error on %d filter:%d flags:%04Xd",
- event_list[i].ident, event_list[i].filter,
- event_list[i].flags);
- continue;
- }
- #if (NGX_HAVE_TIMER_EVENT)
- if (event_list[i].filter == EVFILT_TIMER) {
- ngx_time_update();
- continue;
- }
- #endif
- 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 = (ngx_event_t *) ((uintptr_t) ev & (uintptr_t) ~1);
- if (ev->closed || ev->instance != instance) {
-
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
- "kevent: stale event %p", ev);
- continue;
- }
- if (ev->log && (ev->log->log_level & NGX_LOG_DEBUG_CONNECTION)) {
- ngx_kqueue_dump_event(ev->log, &event_list[i]);
- }
- if (ev->oneshot) {
- ev->active = 0;
- }
- ev->available = event_list[i].data;
- if (event_list[i].flags & EV_EOF) {
- ev->pending_eof = 1;
- ev->kq_errno = event_list[i].fflags;
- }
- ev->ready = 1;
- break;
- case EVFILT_VNODE:
- ev->kq_vnode = 1;
- break;
- case EVFILT_AIO:
- ev->complete = 1;
- ev->ready = 1;
- break;
- default:
- ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
- "unexpected kevent() filter %d",
- event_list[i].filter);
- continue;
- }
- if (flags & NGX_POST_EVENTS) {
- queue = ev->accept ? &ngx_posted_accept_events
- : &ngx_posted_events;
- ngx_post_event(ev, queue);
- continue;
- }
- ev->handler(ev);
- }
- return NGX_OK;
- }
- static ngx_int_t
- ngx_kqueue_process_changes(ngx_cycle_t *cycle, ngx_uint_t try)
- {
- int n;
- ngx_int_t rc;
- ngx_err_t err;
- struct timespec ts;
- struct kevent *changes;
- ngx_mutex_lock(kevent_mutex);
- ngx_mutex_lock(list_mutex);
- if (nchanges == 0) {
- ngx_mutex_unlock(list_mutex);
- ngx_mutex_unlock(kevent_mutex);
- return NGX_OK;
- }
- changes = change_list;
- if (change_list == change_list0) {
- change_list = change_list1;
- } else {
- change_list = change_list0;
- }
- n = (int) nchanges;
- nchanges = 0;
- ngx_mutex_unlock(list_mutex);
- ts.tv_sec = 0;
- ts.tv_nsec = 0;
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
- "kevent changes: %d", n);
- if (kevent(ngx_kqueue, changes, n, NULL, 0, &ts) == -1) {
- err = ngx_errno;
- ngx_log_error((err == NGX_EINTR) ? NGX_LOG_INFO : NGX_LOG_ALERT,
- cycle->log, err, "kevent() failed");
- rc = NGX_ERROR;
- } else {
- rc = NGX_OK;
- }
- ngx_mutex_unlock(kevent_mutex);
- return rc;
- }
- static ngx_inline void
- ngx_kqueue_dump_event(ngx_log_t *log, struct kevent *kev)
- {
- ngx_log_debug6(NGX_LOG_DEBUG_EVENT, log, 0,
- (kev->ident > 0x8000000 && kev->ident != (unsigned) -1) ?
- "kevent: %p: ft:%d fl:%04Xd ff:%08Xd d:%d ud:%p":
- "kevent: %d: ft:%d fl:%04Xd ff:%08Xd d:%d ud:%p",
- kev->ident, kev->filter,
- kev->flags, kev->fflags,
- kev->data, kev->udata);
- }
- static void *
- ngx_kqueue_create_conf(ngx_cycle_t *cycle)
- {
- ngx_kqueue_conf_t *kcf;
- kcf = ngx_palloc(cycle->pool, sizeof(ngx_kqueue_conf_t));
- if (kcf == NULL) {
- return NULL;
- }
- 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_uint_value(kcf->changes, 512);
- ngx_conf_init_uint_value(kcf->events, 512);
- return NGX_CONF_OK;
- }
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