move libevent into base

third_party/libevent/epoll.c

Index: third_party/libevent/epoll.c
diff --git a/third_party/libevent/epoll.c b/third_party/libevent/epoll.c
deleted file mode 100644
index 4387ef896dfb03e66a4da83f0db1951c0f638898..0000000000000000000000000000000000000000
--- a/third_party/libevent/epoll.c
+++ /dev/null
@@ -1,377 +0,0 @@
-/*
- * Copyright 2000-2003 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
-
-#include <stdint.h>
-#include <sys/types.h>
-#include <sys/resource.h>
-#ifdef HAVE_SYS_TIME_H
-#include <sys/time.h>
-#else
-#include <sys/_libevent_time.h>
-#endif
-#include <sys/queue.h>
-#include <sys/epoll.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <errno.h>
-#ifdef HAVE_FCNTL_H
-#include <fcntl.h>
-#endif
-
-#include "event.h"
-#include "event-internal.h"
-#include "evsignal.h"
-#include "log.h"
-
-/* due to limitations in the epoll interface, we need to keep track of
- * all file descriptors outself.
- */
-struct evepoll {
-	struct event *evread;
-	struct event *evwrite;
-};
-
-struct epollop {
-	struct evepoll *fds;
-	int nfds;
-	struct epoll_event *events;
-	int nevents;
-	int epfd;
-};
-
-static void *epoll_init	(struct event_base *);
-static int epoll_add	(void *, struct event *);
-static int epoll_del	(void *, struct event *);
-static int epoll_dispatch	(struct event_base *, void *, struct timeval *);
-static void epoll_dealloc	(struct event_base *, void *);
-
-const struct eventop epollops = {
-	"epoll",
-	epoll_init,
-	epoll_add,
-	epoll_del,
-	epoll_dispatch,
-	epoll_dealloc,
-	1 /* need reinit */
-};
-
-#ifdef HAVE_SETFD
-#define FD_CLOSEONEXEC(x) do { \
-        if (fcntl(x, F_SETFD, 1) == -1) \
-                event_warn("fcntl(%d, F_SETFD)", x); \
-} while (0)
-#else
-#define FD_CLOSEONEXEC(x)
-#endif
-
-/* On Linux kernels at least up to 2.6.24.4, epoll can't handle timeout
- * values bigger than (LONG_MAX - 999ULL)/HZ.  HZ in the wild can be
- * as big as 1000, and LONG_MAX can be as small as (1<<31)-1, so the
- * largest number of msec we can support here is 2147482.  Let's
- * round that down by 47 seconds.
- */
-#define MAX_EPOLL_TIMEOUT_MSEC (35*60*1000)
-
-#define INITIAL_NFILES 32
-#define INITIAL_NEVENTS 32
-#define MAX_NEVENTS 4096
-
-static void *
-epoll_init(struct event_base *base)
-{
-	int epfd;
-	struct epollop *epollop;
-
-	/* Disable epollueue when this environment variable is set */
-	if (evutil_getenv("EVENT_NOEPOLL"))
-		return (NULL);
-
-	/* Initalize the kernel queue */
-	if ((epfd = epoll_create(32000)) == -1) {
-		if (errno != ENOSYS)
-			event_warn("epoll_create");
-		return (NULL);
-	}
-
-	FD_CLOSEONEXEC(epfd);
-
-	if (!(epollop = calloc(1, sizeof(struct epollop))))
-		return (NULL);
-
-	epollop->epfd = epfd;
-
-	/* Initalize fields */
-	epollop->events = malloc(INITIAL_NEVENTS * sizeof(struct epoll_event));
-	if (epollop->events == NULL) {
-		free(epollop);
-		return (NULL);
-	}
-	epollop->nevents = INITIAL_NEVENTS;
-
-	epollop->fds = calloc(INITIAL_NFILES, sizeof(struct evepoll));
-	if (epollop->fds == NULL) {
-		free(epollop->events);
-		free(epollop);
-		return (NULL);
-	}
-	epollop->nfds = INITIAL_NFILES;
-
-	evsignal_init(base);
-
-	return (epollop);
-}
-
-static int
-epoll_recalc(struct event_base *base, void *arg, int max)
-{
-	struct epollop *epollop = arg;
-
-	if (max >= epollop->nfds) {
-		struct evepoll *fds;
-		int nfds;
-
-		nfds = epollop->nfds;
-		while (nfds <= max)
-			nfds <<= 1;
-
-		fds = realloc(epollop->fds, nfds * sizeof(struct evepoll));
-		if (fds == NULL) {
-			event_warn("realloc");
-			return (-1);
-		}
-		epollop->fds = fds;
-		memset(fds + epollop->nfds, 0,
-		    (nfds - epollop->nfds) * sizeof(struct evepoll));
-		epollop->nfds = nfds;
-	}
-
-	return (0);
-}
-
-static int
-epoll_dispatch(struct event_base *base, void *arg, struct timeval *tv)
-{
-	struct epollop *epollop = arg;
-	struct epoll_event *events = epollop->events;
-	struct evepoll *evep;
-	int i, res, timeout = -1;
-
-	if (tv != NULL)
-		timeout = tv->tv_sec * 1000 + (tv->tv_usec + 999) / 1000;
-
-	if (timeout > MAX_EPOLL_TIMEOUT_MSEC) {
-		/* Linux kernels can wait forever if the timeout is too big;
-		 * see comment on MAX_EPOLL_TIMEOUT_MSEC. */
-		timeout = MAX_EPOLL_TIMEOUT_MSEC;
-	}
-
-	res = epoll_wait(epollop->epfd, events, epollop->nevents, timeout);
-
-	if (res == -1) {
-		if (errno != EINTR) {
-			event_warn("epoll_wait");
-			return (-1);
-		}
-
-		evsignal_process(base);
-		return (0);
-	} else if (base->sig.evsignal_caught) {
-		evsignal_process(base);
-	}
-
-	event_debug(("%s: epoll_wait reports %d", __func__, res));
-
-	for (i = 0; i < res; i++) {
-		int what = events[i].events;
-		struct event *evread = NULL, *evwrite = NULL;
-		int fd = events[i].data.fd;
-
-		if (fd < 0 || fd >= epollop->nfds)
-			continue;
-		evep = &epollop->fds[fd];
-
-		if (what & (EPOLLHUP|EPOLLERR)) {
-			evread = evep->evread;
-			evwrite = evep->evwrite;
-		} else {
-			if (what & EPOLLIN) {
-				evread = evep->evread;
-			}
-
-			if (what & EPOLLOUT) {
-				evwrite = evep->evwrite;
-			}
-		}
-
-		if (!(evread||evwrite))
-			continue;
-
-		if (evread != NULL)
-			event_active(evread, EV_READ, 1);
-		if (evwrite != NULL)
-			event_active(evwrite, EV_WRITE, 1);
-	}
-
-	if (res == epollop->nevents && epollop->nevents < MAX_NEVENTS) {
-		/* We used all of the event space this time.  We should
-		   be ready for more events next time. */
-		int new_nevents = epollop->nevents * 2;
-		struct epoll_event *new_events;
-
-		new_events = realloc(epollop->events,
-		    new_nevents * sizeof(struct epoll_event));
-		if (new_events) {
-			epollop->events = new_events;
-			epollop->nevents = new_nevents;
-		}
-	}
-
-	return (0);
-}
-
-
-static int
-epoll_add(void *arg, struct event *ev)
-{
-	struct epollop *epollop = arg;
-	struct epoll_event epev = {0, {0}};
-	struct evepoll *evep;
-	int fd, op, events;
-
-	if (ev->ev_events & EV_SIGNAL)
-		return (evsignal_add(ev));
-
-	fd = ev->ev_fd;
-	if (fd >= epollop->nfds) {
-		/* Extent the file descriptor array as necessary */
-		if (epoll_recalc(ev->ev_base, epollop, fd) == -1)
-			return (-1);
-	}
-	evep = &epollop->fds[fd];
-	op = EPOLL_CTL_ADD;
-	events = 0;
-	if (evep->evread != NULL) {
-		events |= EPOLLIN;
-		op = EPOLL_CTL_MOD;
-	}
-	if (evep->evwrite != NULL) {
-		events |= EPOLLOUT;
-		op = EPOLL_CTL_MOD;
-	}
-
-	if (ev->ev_events & EV_READ)
-		events |= EPOLLIN;
-	if (ev->ev_events & EV_WRITE)
-		events |= EPOLLOUT;
-
-	epev.data.fd = fd;
-	epev.events = events;
-	if (epoll_ctl(epollop->epfd, op, ev->ev_fd, &epev) == -1)
-			return (-1);
-
-	/* Update events responsible */
-	if (ev->ev_events & EV_READ)
-		evep->evread = ev;
-	if (ev->ev_events & EV_WRITE)
-		evep->evwrite = ev;
-
-	return (0);
-}
-
-static int
-epoll_del(void *arg, struct event *ev)
-{
-	struct epollop *epollop = arg;
-	struct epoll_event epev = {0, {0}};
-	struct evepoll *evep;
-	int fd, events, op;
-	int needwritedelete = 1, needreaddelete = 1;
-
-	if (ev->ev_events & EV_SIGNAL)
-		return (evsignal_del(ev));
-
-	fd = ev->ev_fd;
-	if (fd >= epollop->nfds)
-		return (0);
-	evep = &epollop->fds[fd];
-
-	op = EPOLL_CTL_DEL;
-	events = 0;
-
-	if (ev->ev_events & EV_READ)
-		events |= EPOLLIN;
-	if (ev->ev_events & EV_WRITE)
-		events |= EPOLLOUT;
-
-	if ((events & (EPOLLIN|EPOLLOUT)) != (EPOLLIN|EPOLLOUT)) {
-		if ((events & EPOLLIN) && evep->evwrite != NULL) {
-			needwritedelete = 0;
-			events = EPOLLOUT;
-			op = EPOLL_CTL_MOD;
-		} else if ((events & EPOLLOUT) && evep->evread != NULL) {
-			needreaddelete = 0;
-			events = EPOLLIN;
-			op = EPOLL_CTL_MOD;
-		}
-	}
-
-	epev.events = events;
-	epev.data.fd = fd;
-
-	if (needreaddelete)
-		evep->evread = NULL;
-	if (needwritedelete)
-		evep->evwrite = NULL;
-
-	if (epoll_ctl(epollop->epfd, op, fd, &epev) == -1)
-		return (-1);
-
-	return (0);
-}
-
-static void
-epoll_dealloc(struct event_base *base, void *arg)
-{
-	struct epollop *epollop = arg;
-
-	evsignal_dealloc(base);
-	if (epollop->fds)
-		free(epollop->fds);
-	if (epollop->events)
-		free(epollop->events);
-	if (epollop->epfd >= 0)
-		close(epollop->epfd);
-
-	memset(epollop, 0, sizeof(struct epollop));
-	free(epollop);
-}