Mercurial > hg > nginx-quic
view src/event/modules/ngx_kqueue_module.c @ 132:949f45d1589a
nginx-0.0.1-2003-09-24-20:44:13 import
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Wed, 24 Sep 2003 16:44:13 +0000 |
parents | ac69ab96328d |
children | ef8c87afcfc5 |
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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> #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_HAVE_LEVEL_EVENT |NGX_HAVE_ONESHOT_EVENT #if (HAVE_CLEAR_EVENT) |NGX_HAVE_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->timer_set = 0; } /* fall through */ case EVFILT_AIO: ev->ready = 1; 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; }