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/* $OpenBSD: kqueue-timer.c,v 1.3 2018/05/22 19:15:22 cheloha Exp $ */
/*
* Copyright (c) 2015 Bret Stephen Lambert <blambert@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/time.h>
#include <sys/event.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "main.h"
int
do_timer(void)
{
int kq, n;
struct kevent ev;
struct timespec ts;
ASS((kq = kqueue()) >= 0,
warn("kqueue"));
memset(&ev, 0, sizeof(ev));
ev.filter = EVFILT_TIMER;
ev.flags = EV_ADD | EV_ENABLE | EV_ONESHOT;
ev.data = 500; /* 1/2 second in ms */
n = kevent(kq, &ev, 1, NULL, 0, NULL);
ASSX(n != -1);
ts.tv_sec = 2; /* wait 2s for kqueue timeout */
ts.tv_nsec = 0;
n = kevent(kq, NULL, 0, &ev, 1, &ts);
ASSX(n == 1);
/* Now retry w/o EV_ONESHOT, as EV_CLEAR is implicit */
memset(&ev, 0, sizeof(ev));
ev.filter = EVFILT_TIMER;
ev.flags = EV_ADD | EV_ENABLE;
ev.data = 500; /* 1/2 second in ms */
n = kevent(kq, &ev, 1, NULL, 0, NULL);
ASSX(n != -1);
ts.tv_sec = 2; /* wait 2s for kqueue timeout */
ts.tv_nsec = 0;
n = kevent(kq, NULL, 0, &ev, 1, &ts);
ASSX(n == 1);
return (0);
}
int
do_invalid_timer(void)
{
int i, kq, n;
struct kevent ev;
struct timespec invalid_ts[3] = { {-1, 0}, {0, -1}, {0, 1000000000L} };
ASS((kq = kqueue()) >= 0,
warn("kqueue"));
memset(&ev, 0, sizeof(ev));
ev.filter = EVFILT_TIMER;
ev.flags = EV_ADD | EV_ENABLE;
ev.data = 500; /* 1/2 second in ms */
n = kevent(kq, &ev, 1, NULL, 0, NULL);
ASSX(n != -1);
for (i = 0; i < 3; i++) {
n = kevent(kq, NULL, 0, &ev, 1, &invalid_ts[i]);
ASS(n == -1 && errno == EINVAL,
warn("kevent: timeout %lld %ld",
(long long)invalid_ts[i].tv_sec, invalid_ts[i].tv_nsec));
}
return (0);
}
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