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-rw-r--r--libevent/select.c370
1 files changed, 0 insertions, 370 deletions
diff --git a/libevent/select.c b/libevent/select.c
deleted file mode 100644
index 6ce81a2..0000000
--- a/libevent/select.c
+++ /dev/null
@@ -1,370 +0,0 @@
-/*	$OpenBSD: select.c,v 1.2 2002/06/25 15:50:15 mickey 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
-
-#include <sys/types.h>
-#ifdef HAVE_SYS_TIME_H
-#include <sys/time.h>
-#else
-#include <sys/_time.h>
-#endif
-#include <sys/queue.h>
-#include <sys/tree.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"
-
-#ifndef howmany
-#define        howmany(x, y)   (((x)+((y)-1))/(y))
-#endif
-
-extern volatile sig_atomic_t evsignal_caught;
-
-struct selectop {
-	int event_fds;		/* Highest fd in fd set */
-	int event_fdsz;
-	fd_set *event_readset_in;
-	fd_set *event_writeset_in;
-	fd_set *event_readset_out;
-	fd_set *event_writeset_out;
-	struct event **event_r_by_fd;
-	struct event **event_w_by_fd;
-};
-
-void *select_init	(void);
-int select_add		(void *, struct event *);
-int select_del		(void *, struct event *);
-int select_recalc	(struct event_base *, void *, int);
-int select_dispatch	(struct event_base *, void *, struct timeval *);
-void select_dealloc     (void *);
-
-const struct eventop selectops = {
-	"select",
-	select_init,
-	select_add,
-	select_del,
-	select_recalc,
-	select_dispatch,
-	select_dealloc
-};
-
-static int select_resize(struct selectop *sop, int fdsz);
-
-void *
-select_init(void)
-{
-	struct selectop *sop;
-
-	/* Disable select when this environment variable is set */
-	if (getenv("EVENT_NOSELECT"))
-		return (NULL);
-
-	if (!(sop = calloc(1, sizeof(struct selectop))))
-		return (NULL);
-
-	select_resize(sop, howmany(32 + 1, NFDBITS)*sizeof(fd_mask));
-
-	evsignal_init();
-
-	return (sop);
-}
-
-#ifdef CHECK_INVARIANTS
-static void
-check_selectop(struct selectop *sop)
-{
-	int i;
-	for (i=0;i<=sop->event_fds;++i) {
-		if (FD_ISSET(i, sop->event_readset_in)) {
-			assert(sop->event_r_by_fd[i]);
-			assert(sop->event_r_by_fd[i]->ev_events & EV_READ);
-			assert(sop->event_r_by_fd[i]->ev_fd == i);
-		} else {
-			assert(! sop->event_r_by_fd[i]);
-		}
-		if (FD_ISSET(i, sop->event_writeset_in)) {
-			assert(sop->event_w_by_fd[i]);
-			assert(sop->event_w_by_fd[i]->ev_events & EV_WRITE);
-			assert(sop->event_w_by_fd[i]->ev_fd == i);
-		} else {
-			assert(! sop->event_w_by_fd[i]);
-		}
-	}
-
-}
-#else
-#define check_selectop(sop) do { (void) sop; } while (0)
-#endif
-
-/*
- * Called with the highest fd that we know about.  If it is 0, completely
- * recalculate everything.
- */
-
-int
-select_recalc(struct event_base *base, void *arg, int max)
-{
-	struct selectop *sop = arg;
-
-	check_selectop(sop);
-
-	return (0);
-}
-
-int
-select_dispatch(struct event_base *base, void *arg, struct timeval *tv)
-{
-	int res, i;
-	struct selectop *sop = arg;
-
-	check_selectop(sop);
-
-	memcpy(sop->event_readset_out, sop->event_readset_in,
-	       sop->event_fdsz);
-	memcpy(sop->event_writeset_out, sop->event_writeset_in,
-	       sop->event_fdsz);
-
-	res = select(sop->event_fds + 1, sop->event_readset_out,
-	    sop->event_writeset_out, NULL, tv);
-
-	check_selectop(sop);
-
-	if (res == -1) {
-		if (errno != EINTR) {
-			event_warn("select");
-			return (-1);
-		}
-
-		evsignal_process();
-		return (0);
-	} else if (evsignal_caught)
-		evsignal_process();
-
-	event_debug(("%s: select reports %d", __func__, res));
-
-	check_selectop(sop);
-	for (i = 0; i <= sop->event_fds; ++i) {
-		struct event *r_ev = NULL, *w_ev = NULL;
-		res = 0;
-		if (FD_ISSET(i, sop->event_readset_out)) {
-			r_ev = sop->event_r_by_fd[i];
-			res |= EV_READ;
-		}
-		if (FD_ISSET(i, sop->event_writeset_out)) {
-			w_ev = sop->event_w_by_fd[i];
-			res |= EV_WRITE;
-		}
-		if (r_ev && (res & r_ev->ev_events)) {
-			if (!(r_ev->ev_events & EV_PERSIST))
-				event_del(r_ev);
-			event_active(r_ev, res & r_ev->ev_events, 1);
-		}
-		if (w_ev && w_ev != r_ev && (res & w_ev->ev_events)) {
-			if (!(w_ev->ev_events & EV_PERSIST))
-				event_del(w_ev);
-			event_active(w_ev, res & w_ev->ev_events, 1);
-		}
-	}
-	check_selectop(sop);
-
-	return (0);
-}
-
-
-static int
-select_resize(struct selectop *sop, int fdsz)
-{
-	int n_events, n_events_old;
-
-	fd_set *readset_in = NULL;
-	fd_set *writeset_in = NULL;
-	fd_set *readset_out = NULL;
-	fd_set *writeset_out = NULL;
-	struct event **r_by_fd = NULL;
-	struct event **w_by_fd = NULL;
-
-	n_events = (fdsz/sizeof(fd_mask)) * NFDBITS;
-	n_events_old = (sop->event_fdsz/sizeof(fd_mask)) * NFDBITS;
-
-	if (sop->event_readset_in)
-		check_selectop(sop);
-
-	if ((readset_in = realloc(sop->event_readset_in, fdsz)) == NULL)
-		goto error;
-	sop->event_readset_in = readset_in;
-	if ((readset_out = realloc(sop->event_readset_out, fdsz)) == NULL)
-		goto error;
-	sop->event_readset_out = readset_out;
-	if ((writeset_in = realloc(sop->event_writeset_in, fdsz)) == NULL)
-		goto error;
-	sop->event_writeset_in = writeset_in;
-	if ((writeset_out = realloc(sop->event_writeset_out, fdsz)) == NULL)
-		goto error;
-	sop->event_writeset_out = writeset_out;
-	if ((r_by_fd = realloc(sop->event_r_by_fd,
-		 n_events*sizeof(struct event*))) == NULL)
-		goto error;
-	sop->event_r_by_fd = r_by_fd;
-	if ((w_by_fd = realloc(sop->event_w_by_fd,
-		 n_events * sizeof(struct event*))) == NULL)
-		goto error;
-	sop->event_w_by_fd = w_by_fd;
-
-	memset((char *)sop->event_readset_in + sop->event_fdsz, 0,
-	    fdsz - sop->event_fdsz);
-	memset((char *)sop->event_writeset_in + sop->event_fdsz, 0,
-	    fdsz - sop->event_fdsz);
-	memset(sop->event_r_by_fd + n_events_old, 0,
-	    (n_events-n_events_old) * sizeof(struct event*));
-	memset(sop->event_w_by_fd + n_events_old, 0,
-	    (n_events-n_events_old) * sizeof(struct event*));
-
-	sop->event_fdsz = fdsz;
-	check_selectop(sop);
-
-	return (0);
-
- error:
-	event_warn("malloc");
-	return (-1);
-}
-
-
-int
-select_add(void *arg, struct event *ev)
-{
-	struct selectop *sop = arg;
-
-	if (ev->ev_events & EV_SIGNAL)
-		return (evsignal_add(ev));
-
-	check_selectop(sop);
-	/*
-	 * Keep track of the highest fd, so that we can calculate the size
-	 * of the fd_sets for select(2)
-	 */
-	if (sop->event_fds < ev->ev_fd) {
-		int fdsz = sop->event_fdsz;
-
-		if (fdsz < sizeof(fd_mask))
-			fdsz = sizeof(fd_mask);
-
-		while (fdsz <
-		    (howmany(ev->ev_fd + 1, NFDBITS) * sizeof(fd_mask)))
-			fdsz *= 2;
-
-		if (fdsz != sop->event_fdsz) {
-			if (select_resize(sop, fdsz)) {
-				check_selectop(sop);
-				return (-1);
-			}
-		}
-
-		sop->event_fds = ev->ev_fd;
-	}
-
-	if (ev->ev_events & EV_READ) {
-		FD_SET(ev->ev_fd, sop->event_readset_in);
-		sop->event_r_by_fd[ev->ev_fd] = ev;
-	}
-	if (ev->ev_events & EV_WRITE) {
-		FD_SET(ev->ev_fd, sop->event_writeset_in);
-		sop->event_w_by_fd[ev->ev_fd] = ev;
-	}
-	check_selectop(sop);
-
-	return (0);
-}
-
-/*
- * Nothing to be done here.
- */
-
-int
-select_del(void *arg, struct event *ev)
-{
-	struct selectop *sop = arg;
-
-	check_selectop(sop);
-	if (ev->ev_events & EV_SIGNAL)
-		return (evsignal_del(ev));
-
-	if (sop->event_fds < ev->ev_fd) {
-		check_selectop(sop);
-		return (0);
-	}
-
-	if (ev->ev_events & EV_READ) {
-		FD_CLR(ev->ev_fd, sop->event_readset_in);
-		sop->event_r_by_fd[ev->ev_fd] = NULL;
-	}
-
-	if (ev->ev_events & EV_WRITE) {
-		FD_CLR(ev->ev_fd, sop->event_writeset_in);
-		sop->event_w_by_fd[ev->ev_fd] = NULL;
-	}
-
-	check_selectop(sop);
-	return (0);
-}
-
-void
-select_dealloc(void *arg)
-{
-	struct selectop *sop = arg;
-
-	if (sop->event_readset_in)
-		free(sop->event_readset_in);
-	if (sop->event_writeset_in)
-		free(sop->event_writeset_in);
-	if (sop->event_readset_out)
-		free(sop->event_readset_out);
-	if (sop->event_writeset_out)
-		free(sop->event_writeset_out);
-	if (sop->event_r_by_fd)
-		free(sop->event_r_by_fd);
-	if (sop->event_w_by_fd)
-		free(sop->event_w_by_fd);
-
-	memset(sop, 0, sizeof(struct selectop));
-	free(sop);
-}
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