move libevent into base

third_party/libevent/kqueue.c

Index: third_party/libevent/kqueue.c
diff --git a/third_party/libevent/kqueue.c b/third_party/libevent/kqueue.c
deleted file mode 100644
index ee740eec1d675e915fde959d93ace04a4ee5c7ab..0000000000000000000000000000000000000000
--- a/third_party/libevent/kqueue.c
+++ /dev/null
@@ -1,455 +0,0 @@
-/*	$OpenBSD: kqueue.c,v 1.5 2002/07/10 14:41:31 art Exp $	*/
-
-/*
- * Copyright 2000-2002 Niels Provos <provos@citi.umich.edu>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#define _GNU_SOURCE 1
-
-#include <sys/types.h>
-#ifdef HAVE_SYS_TIME_H
-#include <sys/time.h>
-#else
-#include <sys/_libevent_time.h>
-#endif
-#include <sys/queue.h>
-#include <sys/event.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <errno.h>
-#include <assert.h>
-#ifdef HAVE_INTTYPES_H
-#include <inttypes.h>
-#endif
-
-/* Some platforms apparently define the udata field of struct kevent as
- * intptr_t, whereas others define it as void*.  There doesn't seem to be an
- * easy way to tell them apart via autoconf, so we need to use OS macros. */
-#if defined(HAVE_INTTYPES_H) && !defined(__OpenBSD__) && !defined(__FreeBSD__) && !defined(__darwin__) && !defined(__APPLE__)
-#define PTR_TO_UDATA(x)	((intptr_t)(x))
-#else
-#define PTR_TO_UDATA(x)	(x)
-#endif
-
-#include "event.h"
-#include "event-internal.h"
-#include "log.h"
-#include "evsignal.h"
-
-#define EVLIST_X_KQINKERNEL	0x1000
-
-#define NEVENT		64
-
-struct kqop {
-	struct kevent *changes;
-	int nchanges;
-	struct kevent *events;
-	struct event_list evsigevents[NSIG];
-	int nevents;
-	int kq;
-	pid_t pid;
-};
-
-static void *kq_init	(struct event_base *);
-static int kq_add	(void *, struct event *);
-static int kq_del	(void *, struct event *);
-static int kq_dispatch	(struct event_base *, void *, struct timeval *);
-static int kq_insert	(struct kqop *, struct kevent *);
-static void kq_dealloc (struct event_base *, void *);
-
-const struct eventop kqops = {
-	"kqueue",
-	kq_init,
-	kq_add,
-	kq_del,
-	kq_dispatch,
-	kq_dealloc,
-	1 /* need reinit */
-};
-
-static void *
-kq_init(struct event_base *base)
-{
-	int i, kq;
-	struct kqop *kqueueop;
-
-	/* Disable kqueue when this environment variable is set */
-	if (evutil_getenv("EVENT_NOKQUEUE"))
-		return (NULL);
-
-	if (!(kqueueop = calloc(1, sizeof(struct kqop))))
-		return (NULL);
-
-	/* Initalize the kernel queue */
-	
-	if ((kq = kqueue()) == -1) {
-		event_warn("kqueue");
-		free (kqueueop);
-		return (NULL);
-	}
-
-	kqueueop->kq = kq;
-
-	kqueueop->pid = getpid();
-
-	/* Initalize fields */
-	kqueueop->changes = malloc(NEVENT * sizeof(struct kevent));
-	if (kqueueop->changes == NULL) {
-		free (kqueueop);
-		return (NULL);
-	}
-	kqueueop->events = malloc(NEVENT * sizeof(struct kevent));
-	if (kqueueop->events == NULL) {
-		free (kqueueop->changes);
-		free (kqueueop);
-		return (NULL);
-	}
-	kqueueop->nevents = NEVENT;
-
-	/* we need to keep track of multiple events per signal */
-	for (i = 0; i < NSIG; ++i) {
-		TAILQ_INIT(&kqueueop->evsigevents[i]);
-	}
-
-	/* Check for Mac OS X kqueue bug. */
-	memset(&kqueueop->changes[0], 0, sizeof kqueueop->changes[0]);
-	kqueueop->changes[0].ident = -1;
-	kqueueop->changes[0].filter = EVFILT_READ;
-	kqueueop->changes[0].flags = EV_ADD;
-	/* 
-	 * If kqueue works, then kevent will succeed, and it will
-	 * stick an error in events[0].  If kqueue is broken, then
-	 * kevent will fail.
-	 */
-	if (kevent(kq,
-		kqueueop->changes, 1, kqueueop->events, NEVENT, NULL) != 1 ||
-	    kqueueop->events[0].ident != -1 ||
-	    kqueueop->events[0].flags != EV_ERROR) {
-		event_warn("%s: detected broken kqueue; not using.", __func__);
-		free(kqueueop->changes);
-		free(kqueueop->events);
-		free(kqueueop);
-		close(kq);
-		return (NULL);
-	}
-
-	return (kqueueop);
-}
-
-static int
-kq_insert(struct kqop *kqop, struct kevent *kev)
-{
-	int nevents = kqop->nevents;
-
-	if (kqop->nchanges == nevents) {
-		struct kevent *newchange;
-		struct kevent *newresult;
-
-		nevents *= 2;
-
-		newchange = realloc(kqop->changes,
-				    nevents * sizeof(struct kevent));
-		if (newchange == NULL) {
-			event_warn("%s: malloc", __func__);
-			return (-1);
-		}
-		kqop->changes = newchange;
-
-		newresult = realloc(kqop->events,
-				    nevents * sizeof(struct kevent));
-
-		/*
-		 * If we fail, we don't have to worry about freeing,
-		 * the next realloc will pick it up.
-		 */
-		if (newresult == NULL) {
-			event_warn("%s: malloc", __func__);
-			return (-1);
-		}
-		kqop->events = newresult;
-
-		kqop->nevents = nevents;
-	}
-
-	memcpy(&kqop->changes[kqop->nchanges++], kev, sizeof(struct kevent));
-
-	event_debug(("%s: fd %d %s%s",
-		__func__, (int)kev->ident, 
-		kev->filter == EVFILT_READ ? "EVFILT_READ" : "EVFILT_WRITE",
-		kev->flags == EV_DELETE ? " (del)" : ""));
-
-	return (0);
-}
-
-static void
-kq_sighandler(int sig)
-{
-	/* Do nothing here */
-}
-
-static int
-kq_dispatch(struct event_base *base, void *arg, struct timeval *tv)
-{
-	struct kqop *kqop = arg;
-	struct kevent *changes = kqop->changes;
-	struct kevent *events = kqop->events;
-	struct event *ev;
-	struct timespec ts, *ts_p = NULL;
-	int i, res;
-
-	if (tv != NULL) {
-		TIMEVAL_TO_TIMESPEC(tv, &ts);
-		ts_p = &ts;
-	}
-
-	res = kevent(kqop->kq, changes, kqop->nchanges,
-	    events, kqop->nevents, ts_p);
-	kqop->nchanges = 0;
-	if (res == -1) {
-		if (errno != EINTR) {
-                        event_warn("kevent");
-			return (-1);
-		}
-
-		return (0);
-	}
-
-	event_debug(("%s: kevent reports %d", __func__, res));
-
-	for (i = 0; i < res; i++) {
-		int which = 0;
-
-		if (events[i].flags & EV_ERROR) {
-			/* 
-			 * Error messages that can happen, when a delete fails.
-			 *   EBADF happens when the file discriptor has been
-			 *   closed,
-			 *   ENOENT when the file discriptor was closed and
-			 *   then reopened.
-			 *   EINVAL for some reasons not understood; EINVAL
-			 *   should not be returned ever; but FreeBSD does :-\
-			 * An error is also indicated when a callback deletes
-			 * an event we are still processing.  In that case
-			 * the data field is set to ENOENT.
-			 */
-			if (events[i].data == EBADF ||
-			    events[i].data == EINVAL ||
-			    events[i].data == ENOENT)
-				continue;
-			errno = events[i].data;
-			return (-1);
-		}
-
-		if (events[i].filter == EVFILT_READ) {
-			which |= EV_READ;
-		} else if (events[i].filter == EVFILT_WRITE) {
-			which |= EV_WRITE;
-		} else if (events[i].filter == EVFILT_SIGNAL) {
-			which |= EV_SIGNAL;
-		}
-
-		if (!which)
-			continue;
-
-		if (events[i].filter == EVFILT_SIGNAL) {
-			struct event_list *head =
-			    (struct event_list *)events[i].udata;
-			TAILQ_FOREACH(ev, head, ev_signal_next) {
-				event_active(ev, which, events[i].data);
-			}
-		} else {
-			ev = (struct event *)events[i].udata;
-
-			if (!(ev->ev_events & EV_PERSIST))
-				ev->ev_flags &= ~EVLIST_X_KQINKERNEL;
-
-			event_active(ev, which, 1);
-		}
-	}
-
-	return (0);
-}
-
-
-static int
-kq_add(void *arg, struct event *ev)
-{
-	struct kqop *kqop = arg;
-	struct kevent kev;
-
-	if (ev->ev_events & EV_SIGNAL) {
-		int nsignal = EVENT_SIGNAL(ev);
-
-		assert(nsignal >= 0 && nsignal < NSIG);
-		if (TAILQ_EMPTY(&kqop->evsigevents[nsignal])) {
-			struct timespec timeout = { 0, 0 };
-			
-			memset(&kev, 0, sizeof(kev));
-			kev.ident = nsignal;
-			kev.filter = EVFILT_SIGNAL;
-			kev.flags = EV_ADD;
-			kev.udata = PTR_TO_UDATA(&kqop->evsigevents[nsignal]);
-			
-			/* Be ready for the signal if it is sent any
-			 * time between now and the next call to
-			 * kq_dispatch. */
-			if (kevent(kqop->kq, &kev, 1, NULL, 0, &timeout) == -1)
-				return (-1);
-			
-			if (_evsignal_set_handler(ev->ev_base, nsignal,
-				kq_sighandler) == -1)
-				return (-1);
-		}
-
-		TAILQ_INSERT_TAIL(&kqop->evsigevents[nsignal], ev,
-		    ev_signal_next);
-		ev->ev_flags |= EVLIST_X_KQINKERNEL;
-		return (0);
-	}
-
-	if (ev->ev_events & EV_READ) {
- 		memset(&kev, 0, sizeof(kev));
-		kev.ident = ev->ev_fd;
-		kev.filter = EVFILT_READ;
-#ifdef NOTE_EOF
-		/* Make it behave like select() and poll() */
-		kev.fflags = NOTE_EOF;
-#endif
-		kev.flags = EV_ADD;
-		if (!(ev->ev_events & EV_PERSIST))
-			kev.flags |= EV_ONESHOT;
-		kev.udata = PTR_TO_UDATA(ev);
-		
-		if (kq_insert(kqop, &kev) == -1)
-			return (-1);
-
-		ev->ev_flags |= EVLIST_X_KQINKERNEL;
-	}
-
-	if (ev->ev_events & EV_WRITE) {
- 		memset(&kev, 0, sizeof(kev));
-		kev.ident = ev->ev_fd;
-		kev.filter = EVFILT_WRITE;
-		kev.flags = EV_ADD;
-		if (!(ev->ev_events & EV_PERSIST))
-			kev.flags |= EV_ONESHOT;
-		kev.udata = PTR_TO_UDATA(ev);
-		
-		if (kq_insert(kqop, &kev) == -1)
-			return (-1);
-
-		ev->ev_flags |= EVLIST_X_KQINKERNEL;
-	}
-
-	return (0);
-}
-
-static int
-kq_del(void *arg, struct event *ev)
-{
-	struct kqop *kqop = arg;
-	struct kevent kev;
-
-	if (!(ev->ev_flags & EVLIST_X_KQINKERNEL))
-		return (0);
-
-	if (ev->ev_events & EV_SIGNAL) {
-		int nsignal = EVENT_SIGNAL(ev);
-		struct timespec timeout = { 0, 0 };
-
-		assert(nsignal >= 0 && nsignal < NSIG);
-		TAILQ_REMOVE(&kqop->evsigevents[nsignal], ev, ev_signal_next);
-		if (TAILQ_EMPTY(&kqop->evsigevents[nsignal])) {
-			memset(&kev, 0, sizeof(kev));
-			kev.ident = nsignal;
-			kev.filter = EVFILT_SIGNAL;
-			kev.flags = EV_DELETE;
-		
-			/* Because we insert signal events
-			 * immediately, we need to delete them
-			 * immediately, too */
-			if (kevent(kqop->kq, &kev, 1, NULL, 0, &timeout) == -1)
-				return (-1);
-
-			if (_evsignal_restore_handler(ev->ev_base,
-				nsignal) == -1)
-				return (-1);
-		}
-
-		ev->ev_flags &= ~EVLIST_X_KQINKERNEL;
-		return (0);
-	}
-
-	if (ev->ev_events & EV_READ) {
- 		memset(&kev, 0, sizeof(kev));
-		kev.ident = ev->ev_fd;
-		kev.filter = EVFILT_READ;
-		kev.flags = EV_DELETE;
-		
-		if (kq_insert(kqop, &kev) == -1)
-			return (-1);
-
-		ev->ev_flags &= ~EVLIST_X_KQINKERNEL;
-	}
-
-	if (ev->ev_events & EV_WRITE) {
- 		memset(&kev, 0, sizeof(kev));
-		kev.ident = ev->ev_fd;
-		kev.filter = EVFILT_WRITE;
-		kev.flags = EV_DELETE;
-		
-		if (kq_insert(kqop, &kev) == -1)
-			return (-1);
-
-		ev->ev_flags &= ~EVLIST_X_KQINKERNEL;
-	}
-
-	return (0);
-}
-
-static void
-kq_dealloc(struct event_base *base, void *arg)
-{
-	struct kqop *kqop = arg;
-
-	evsignal_dealloc(base);
-
-	if (kqop->changes)
-		free(kqop->changes);
-	if (kqop->events)
-		free(kqop->events);
-	if (kqop->kq >= 0 && kqop->pid == getpid())
-		close(kqop->kq);
-
-	memset(kqop, 0, sizeof(struct kqop));
-	free(kqop);
-}