[src/kqueue]: src/sys/dev/isa Add kqueue support.

[thorpej <thorpej%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/9ce2b80bdafb
branches:  kqueue
changeset: 512427:9ce2b80bdafb
user:      thorpej <thorpej%NetBSD.org@localhost>
date:      Tue Sep 11 21:53:09 2001 +0000

description:
Add kqueue support.

diffstat:

 sys/dev/isa/satlink.c |  66 ++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 65 insertions(+), 1 deletions(-)

diffs (80 lines):

diff -r fec492633e3f -r 9ce2b80bdafb sys/dev/isa/satlink.c
--- a/sys/dev/isa/satlink.c     Sun Sep 09 19:15:59 2001 +0000
+++ b/sys/dev/isa/satlink.c     Tue Sep 11 21:53:09 2001 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: satlink.c,v 1.11.4.1 2001/08/03 04:13:11 lukem Exp $   */
+/*     $NetBSD: satlink.c,v 1.11.4.2 2001/09/11 21:53:09 thorpej Exp $ */
 
 /*-
  * Copyright (c) 1997 The NetBSD Foundation, Inc.
@@ -411,6 +411,70 @@
        return (revents);
 }
 
+static void
+filt_satlinkrdetach(struct knote *kn)
+{
+       struct satlink_softc *sc = (void *) kn->kn_hook;
+       int s;
+
+       s = splsoftclock();
+       SLIST_REMOVE(&sc->sc_selq.si_klist, kn, knote, kn_selnext);
+       splx(s);
+}
+
+static int
+filt_satlinkread(struct knote *kn, long hint)
+{
+       struct satlink_softc *sc = (void *) kn->kn_hook;
+
+       if (sc->sc_uptr == sc->sc_sptr)
+               return (0);
+
+       if (sc->sc_sptr > sc->sc_uptr)
+               kn->kn_data = sc->sc_sptr - sc->sc_uptr;
+       else
+               kn->kn_data = (sc->sc_bufsize - sc->sc_uptr) +
+                   sc->sc_sptr;
+       return (1);
+}
+
+static const struct filterops satlinkread_filtops =
+       { 1, NULL, filt_satlinkrdetach, filt_satlinkread };
+
+static const struct filterops satlink_seltrue_filtops =
+       { 1, NULL, filt_satlinkrdetach, filt_seltrue };
+
+int
+satlinkkqfilter(dev_t dev, struct knote *kn)
+{
+       struct satlink_softc *sc = device_lookup(&satlink_cd, minor(dev));
+       struct klist *klist;
+       int s;
+
+       switch (kn->kn_filter) {
+       case EVFILT_READ:
+               klist = &sc->sc_selq.si_klist;
+               kn->kn_fop = &satlinkread_filtops;
+               break;
+
+       case EVFILT_WRITE:
+               klist = &sc->sc_selq.si_klist;
+               kn->kn_fop = &satlink_seltrue_filtops;
+               break;
+
+       default:
+               return (1);
+       }
+
+       kn->kn_hook = (void *) sc;
+
+       s = splsoftclock();
+       SLIST_INSERT_HEAD(klist, kn, kn_selnext);
+       splx(s);
+
+       return (0);
+}
+
 void
 satlinktimeout(arg)
        void *arg;