move libevent into base

third_party/libevent/poll.c

Index: third_party/libevent/poll.c
diff --git a/third_party/libevent/poll.c b/third_party/libevent/poll.c
deleted file mode 100644
index 2aa245b3717386e0a93d7fc94ba87f2c7b4f10a7..0000000000000000000000000000000000000000
--- a/third_party/libevent/poll.c
+++ /dev/null
@@ -1,379 +0,0 @@
-/*	$OpenBSD: poll.c,v 1.2 2002/06/25 15:50:15 mickey Exp $	*/
-
-/*
- * 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 <sys/types.h>
-#ifdef HAVE_SYS_TIME_H
-#include <sys/time.h>
-#else
-#include <sys/_libevent_time.h>
-#endif
-#include <sys/queue.h>
-#include <poll.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <errno.h>
-#ifdef CHECK_INVARIANTS
-#include <assert.h>
-#endif
-
-#include "event.h"
-#include "event-internal.h"
-#include "evsignal.h"
-#include "log.h"
-
-struct pollop {
-	int event_count;		/* Highest number alloc */
-	int nfds;                       /* Size of event_* */
-	int fd_count;                   /* Size of idxplus1_by_fd */
-	struct pollfd *event_set;
-	struct event **event_r_back;
-	struct event **event_w_back;
-	int *idxplus1_by_fd; /* Index into event_set by fd; we add 1 so
-			      * that 0 (which is easy to memset) can mean
-			      * "no entry." */
-};
-
-static void *poll_init	(struct event_base *);
-static int poll_add		(void *, struct event *);
-static int poll_del		(void *, struct event *);
-static int poll_dispatch	(struct event_base *, void *, struct timeval *);
-static void poll_dealloc	(struct event_base *, void *);
-
-const struct eventop pollops = {
-	"poll",
-	poll_init,
-	poll_add,
-	poll_del,
-	poll_dispatch,
-	poll_dealloc,
-    0
-};
-
-static void *
-poll_init(struct event_base *base)
-{
-	struct pollop *pollop;
-
-	/* Disable poll when this environment variable is set */
-	if (evutil_getenv("EVENT_NOPOLL"))
-		return (NULL);
-
-	if (!(pollop = calloc(1, sizeof(struct pollop))))
-		return (NULL);
-
-	evsignal_init(base);
-
-	return (pollop);
-}
-
-#ifdef CHECK_INVARIANTS
-static void
-poll_check_ok(struct pollop *pop)
-{
-	int i, idx;
-	struct event *ev;
-
-	for (i = 0; i < pop->fd_count; ++i) {
-		idx = pop->idxplus1_by_fd[i]-1;
-		if (idx < 0)
-			continue;
-		assert(pop->event_set[idx].fd == i);
-		if (pop->event_set[idx].events & POLLIN) {
-			ev = pop->event_r_back[idx];
-			assert(ev);
-			assert(ev->ev_events & EV_READ);
-			assert(ev->ev_fd == i);
-		}
-		if (pop->event_set[idx].events & POLLOUT) {
-			ev = pop->event_w_back[idx];
-			assert(ev);
-			assert(ev->ev_events & EV_WRITE);
-			assert(ev->ev_fd == i);
-		}
-	}
-	for (i = 0; i < pop->nfds; ++i) {
-		struct pollfd *pfd = &pop->event_set[i];
-		assert(pop->idxplus1_by_fd[pfd->fd] == i+1);
-	}
-}
-#else
-#define poll_check_ok(pop)
-#endif
-
-static int
-poll_dispatch(struct event_base *base, void *arg, struct timeval *tv)
-{
-	int res, i, j, msec = -1, nfds;
-	struct pollop *pop = arg;
-
-	poll_check_ok(pop);
-
-	if (tv != NULL)
-		msec = tv->tv_sec * 1000 + (tv->tv_usec + 999) / 1000;
-
-	nfds = pop->nfds;
-	res = poll(pop->event_set, nfds, msec);
-
-	if (res == -1) {
-		if (errno != EINTR) {
-                        event_warn("poll");
-			return (-1);
-		}
-
-		evsignal_process(base);
-		return (0);
-	} else if (base->sig.evsignal_caught) {
-		evsignal_process(base);
-	}
-
-	event_debug(("%s: poll reports %d", __func__, res));
-
-	if (res == 0 || nfds == 0)
-		return (0);
-
-	i = random() % nfds;
-	for (j = 0; j < nfds; j++) {
-		struct event *r_ev = NULL, *w_ev = NULL;
-		int what;
-		if (++i == nfds)
-			i = 0;
-		what = pop->event_set[i].revents;
-
-		if (!what)
-			continue;
-
-		res = 0;
-
-		/* If the file gets closed notify */
-		if (what & (POLLHUP|POLLERR))
-			what |= POLLIN|POLLOUT;
-		if (what & POLLIN) {
-			res |= EV_READ;
-			r_ev = pop->event_r_back[i];
-		}
-		if (what & POLLOUT) {
-			res |= EV_WRITE;
-			w_ev = pop->event_w_back[i];
-		}
-		if (res == 0)
-			continue;
-
-		if (r_ev && (res & r_ev->ev_events)) {
-			event_active(r_ev, res & r_ev->ev_events, 1);
-		}
-		if (w_ev && w_ev != r_ev && (res & w_ev->ev_events)) {
-			event_active(w_ev, res & w_ev->ev_events, 1);
-		}
-	}
-
-	return (0);
-}
-
-static int
-poll_add(void *arg, struct event *ev)
-{
-	struct pollop *pop = arg;
-	struct pollfd *pfd = NULL;
-	int i;
-
-	if (ev->ev_events & EV_SIGNAL)
-		return (evsignal_add(ev));
-	if (!(ev->ev_events & (EV_READ|EV_WRITE)))
-		return (0);
-
-	poll_check_ok(pop);
-	if (pop->nfds + 1 >= pop->event_count) {
-		struct pollfd *tmp_event_set;
-		struct event **tmp_event_r_back;
-		struct event **tmp_event_w_back;
-		int tmp_event_count;
-
-		if (pop->event_count < 32)
-			tmp_event_count = 32;
-		else
-			tmp_event_count = pop->event_count * 2;
-
-		/* We need more file descriptors */
-		tmp_event_set = realloc(pop->event_set,
-				 tmp_event_count * sizeof(struct pollfd));
-		if (tmp_event_set == NULL) {
-			event_warn("realloc");
-			return (-1);
-		}
-		pop->event_set = tmp_event_set;
-
-		tmp_event_r_back = realloc(pop->event_r_back,
-			    tmp_event_count * sizeof(struct event *));
-		if (tmp_event_r_back == NULL) {
-			/* event_set overallocated; that's okay. */
-			event_warn("realloc");
-			return (-1);
-		}
-		pop->event_r_back = tmp_event_r_back;
-
-		tmp_event_w_back = realloc(pop->event_w_back,
-			    tmp_event_count * sizeof(struct event *));
-		if (tmp_event_w_back == NULL) {
-			/* event_set and event_r_back overallocated; that's
-			 * okay. */
-			event_warn("realloc");
-			return (-1);
-		}
-		pop->event_w_back = tmp_event_w_back;
-
-		pop->event_count = tmp_event_count;
-	}
-	if (ev->ev_fd >= pop->fd_count) {
-		int *tmp_idxplus1_by_fd;
-		int new_count;
-		if (pop->fd_count < 32)
-			new_count = 32;
-		else
-			new_count = pop->fd_count * 2;
-		while (new_count <= ev->ev_fd)
-			new_count *= 2;
-		tmp_idxplus1_by_fd =
-			realloc(pop->idxplus1_by_fd, new_count * sizeof(int));
-		if (tmp_idxplus1_by_fd == NULL) {
-			event_warn("realloc");
-			return (-1);
-		}
-		pop->idxplus1_by_fd = tmp_idxplus1_by_fd;
-		memset(pop->idxplus1_by_fd + pop->fd_count,
-		       0, sizeof(int)*(new_count - pop->fd_count));
-		pop->fd_count = new_count;
-	}
-
-	i = pop->idxplus1_by_fd[ev->ev_fd] - 1;
-	if (i >= 0) {
-		pfd = &pop->event_set[i];
-	} else {
-		i = pop->nfds++;
-		pfd = &pop->event_set[i];
-		pfd->events = 0;
-		pfd->fd = ev->ev_fd;
-		pop->event_w_back[i] = pop->event_r_back[i] = NULL;
-		pop->idxplus1_by_fd[ev->ev_fd] = i + 1;
-	}
-
-	pfd->revents = 0;
-	if (ev->ev_events & EV_WRITE) {
-		pfd->events |= POLLOUT;
-		pop->event_w_back[i] = ev;
-	}
-	if (ev->ev_events & EV_READ) {
-		pfd->events |= POLLIN;
-		pop->event_r_back[i] = ev;
-	}
-	poll_check_ok(pop);
-
-	return (0);
-}
-
-/*
- * Nothing to be done here.
- */
-
-static int
-poll_del(void *arg, struct event *ev)
-{
-	struct pollop *pop = arg;
-	struct pollfd *pfd = NULL;
-	int i;
-
-	if (ev->ev_events & EV_SIGNAL)
-		return (evsignal_del(ev));
-
-	if (!(ev->ev_events & (EV_READ|EV_WRITE)))
-		return (0);
-
-	poll_check_ok(pop);
-	i = pop->idxplus1_by_fd[ev->ev_fd] - 1;
-	if (i < 0)
-		return (-1);
-
-	/* Do we still want to read or write? */
-	pfd = &pop->event_set[i];
-	if (ev->ev_events & EV_READ) {
-		pfd->events &= ~POLLIN;
-		pop->event_r_back[i] = NULL;
-	}
-	if (ev->ev_events & EV_WRITE) {
-		pfd->events &= ~POLLOUT;
-		pop->event_w_back[i] = NULL;
-	}
-	poll_check_ok(pop);
-	if (pfd->events)
-		/* Another event cares about that fd. */
-		return (0);
-
-	/* Okay, so we aren't interested in that fd anymore. */
-	pop->idxplus1_by_fd[ev->ev_fd] = 0;
-
-	--pop->nfds;
-	if (i != pop->nfds) {
-		/* 
-		 * Shift the last pollfd down into the now-unoccupied
-		 * position.
-		 */
-		memcpy(&pop->event_set[i], &pop->event_set[pop->nfds],
-		       sizeof(struct pollfd));
-		pop->event_r_back[i] = pop->event_r_back[pop->nfds];
-		pop->event_w_back[i] = pop->event_w_back[pop->nfds];
-		pop->idxplus1_by_fd[pop->event_set[i].fd] = i + 1;
-	}
-
-	poll_check_ok(pop);
-	return (0);
-}
-
-static void
-poll_dealloc(struct event_base *base, void *arg)
-{
-	struct pollop *pop = arg;
-
-	evsignal_dealloc(base);
-	if (pop->event_set)
-		free(pop->event_set);
-	if (pop->event_r_back)
-		free(pop->event_r_back);
-	if (pop->event_w_back)
-		free(pop->event_w_back);
-	if (pop->idxplus1_by_fd)
-		free(pop->idxplus1_by_fd);
-
-	memset(pop, 0, sizeof(struct pollop));
-	free(pop);
-}