/*
 * Copyright (c) 2009 Mark Heily <mark@heily.com>
 *
 * 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.
 *
 * $FreeBSD: head/tools/regression/kqueue/user.c 200483 2009-12-13 20:27:46Z rwatson $
 */

#include "common.h"

int kqfd;

static void
add_and_delete(void)
{
    const char *test_id = "kevent(EVFILT_USER, EV_ADD and EV_DELETE)";
    struct kevent kev;

    test_begin(test_id);

    kevent_add(kqfd, &kev, 1, EVFILT_USER, EV_ADD, 0, 0, NULL);
    test_no_kevents();

    kevent_add(kqfd, &kev, 1, EVFILT_USER, EV_DELETE, 0, 0, NULL);
    test_no_kevents();

    success();
}

static void
event_wait(void)
{
    const char *test_id = "kevent(EVFILT_USER, wait)";
    struct kevent kev;

    test_begin(test_id);

    /* Add the event, and then trigger it */
    kevent_add(kqfd, &kev, 1, EVFILT_USER, EV_ADD, 0, 0, NULL);    
    kevent_add(kqfd, &kev, 1, EVFILT_USER, 0, NOTE_TRIGGER, 0, NULL);    

    kev.fflags &= ~NOTE_FFCTRLMASK;
    kev.fflags &= ~NOTE_TRIGGER;
    kevent_cmp(&kev, kevent_get(kqfd));

    test_no_kevents();

    success();
}

static void
disable_and_enable(void)
{
    const char *test_id = "kevent(EVFILT_USER, EV_DISABLE and EV_ENABLE)";
    struct kevent kev;

    test_begin(test_id);

    kevent_add(kqfd, &kev, 1, EVFILT_USER, EV_ADD, 0, 0, NULL); 
    kevent_add(kqfd, &kev, 1, EVFILT_USER, EV_DISABLE, 0, 0, NULL); 

    /* Trigger the event, but since it is disabled, nothing will happen. */
    kevent_add(kqfd, &kev, 1, EVFILT_USER, 0, NOTE_TRIGGER, 0, NULL); 
    test_no_kevents();

    kevent_add(kqfd, &kev, 1, EVFILT_USER, EV_ENABLE, 0, 0, NULL); 
    kevent_add(kqfd, &kev, 1, EVFILT_USER, 0, NOTE_TRIGGER, 0, NULL); 

    kev.flags = 0;
    kev.fflags &= ~NOTE_FFCTRLMASK;
    kev.fflags &= ~NOTE_TRIGGER;
    kevent_cmp(&kev, kevent_get(kqfd));

    success();
}

static void
oneshot(void)
{
    const char *test_id = "kevent(EVFILT_USER, EV_ONESHOT)";
    struct kevent kev;

    test_begin(test_id);

    kevent_add(kqfd, &kev, 1, EVFILT_USER, EV_ADD | EV_ONESHOT, 0, 0, NULL);    

    puts("  -- event 1");
    kevent_add(kqfd, &kev, 1, EVFILT_USER, 0, NOTE_TRIGGER, 0, NULL);    

    kev.flags = 0;
    kev.fflags &= ~NOTE_FFCTRLMASK;
    kev.fflags &= ~NOTE_TRIGGER;
    kevent_cmp(&kev, kevent_get(kqfd));

    /* Try to trigger the event again. It is deleted, so that
       should be an error. However, on FreeBSD 8 it is not an error,
       so the event is ignored.
     */
    puts("  -- triggering an event that will be ignored");
    kev.flags = 0; 
    kev.fflags |= NOTE_TRIGGER;
    if (kevent(kqfd, &kev, 1, NULL, 0, NULL) < 0)
        err(1, "%s", test_id);

    test_no_kevents();

    success();
}

void
test_evfilt_user()
{
	kqfd = kqueue();

    add_and_delete();
    event_wait();
    disable_and_enable();
    oneshot();
    /* TODO: try different fflags operations */

	close(kqfd);
}