2 * Copyright (c) 2009 Mark Heily <mark@heily.com>
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 #include "sys/event.h"
21 evfilt_user_init(struct filter *filt)
27 evfilt_user_destroy(struct filter *filt)
33 evfilt_user_copyout(struct filter *filt,
40 for (kn = knote_dequeue(filt); kn != NULL; kn = knote_dequeue(filt)) {
41 memcpy(dst, &kn->kev, sizeof(*dst));
42 dst->fflags &= ~NOTE_FFCTRLMASK; //FIXME: Not sure if needed
43 dst->fflags &= ~NOTE_TRIGGER;
44 if (kn->kev.flags & EV_ADD) {
45 /* NOTE: True on FreeBSD but not consistent behavior with
47 dst->flags &= ~EV_ADD;
49 if (kn->kev.flags & EV_CLEAR)
50 kn->kev.fflags &= ~NOTE_TRIGGER;
51 /* FIXME: This shouldn't be necessary in Solaris...
52 if (kn->kev.flags & (EV_DISPATCH | EV_CLEAR | EV_ONESHOT))
53 eventfd_lower(filt->kf_efd);
55 if (kn->kev.flags & EV_DISPATCH) {
57 kn->kev.fflags &= ~NOTE_TRIGGER;
58 } else if (kn->kev.flags & EV_ONESHOT) {
63 if (++nevents == maxevents)
67 /* This should normally never happen but is here for debugging */
69 dbg_puts("spurious wakeup");
70 /* FIXME: NOT IMPLEMENTED: eventfd_lower(filt->kf_efd); */
78 evfilt_user_knote_create(struct filter *filt, struct knote *kn)
83 //determine if EV_ADD + NOTE_TRIGGER in the same kevent will cause a trigger */
84 if ((!(dst->kev.flags & EV_DISABLE)) && src->fflags & NOTE_TRIGGER) {
85 dst->kev.fflags |= NOTE_TRIGGER;
86 eventfd_raise(filt->kf_pfd);
94 evfilt_user_knote_modify(struct filter *filt, struct knote *kn,
95 const struct kevent *kev)
100 /* Excerpted from sys/kern/kern_event.c in FreeBSD HEAD */
101 ffctrl = kev->fflags & NOTE_FFCTRLMASK;
102 fflags = kev->fflags & NOTE_FFLAGSMASK;
108 kn->kev.fflags &= fflags;
112 kn->kev.fflags |= fflags;
116 kn->kev.fflags = fflags;
120 /* XXX Return error? */
124 if ((!(kn->kev.flags & EV_DISABLE)) && kev->fflags & NOTE_TRIGGER) {
125 kn->kev.fflags |= NOTE_TRIGGER;
126 knote_enqueue(filt, kn);
127 return (port_send(filt->kf_kqueue->kq_port, X_PORT_SOURCE_USER, NULL));
134 evfilt_user_knote_delete(struct filter *filt, struct knote *kn)
140 evfilt_user_knote_enable(struct filter *filt, struct knote *kn)
142 /* FIXME: what happens if NOTE_TRIGGER is in fflags?
143 should the event fire? */
148 evfilt_user_knote_disable(struct filter *filt, struct knote *kn)
153 const struct filter evfilt_user = {
158 evfilt_user_knote_create,
159 evfilt_user_knote_modify,
160 evfilt_user_knote_delete,
161 evfilt_user_knote_enable,
162 evfilt_user_knote_disable,