[src/kqueue]: src/sys/arch/shark/shark add kqfilter hook (code taken from i38...

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

details:   https://anonhg.NetBSD.org/src/rev/0c82713fe452
branches:  kqueue
changeset: 512485:0c82713fe452
user:      jdolecek <jdolecek%NetBSD.org@localhost>
date:      Sun Jun 23 18:16:19 2002 +0000

description:
add kqfilter hook (code taken from i386 olms)

diffstat:

 sys/arch/shark/shark/opms.c |  50 ++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 49 insertions(+), 1 deletions(-)

diffs (61 lines):

diff -r 261aba88b4e4 -r 0c82713fe452 sys/arch/shark/shark/opms.c
--- a/sys/arch/shark/shark/opms.c       Sun Jun 23 17:43:33 2002 +0000
+++ b/sys/arch/shark/shark/opms.c       Sun Jun 23 18:16:19 2002 +0000
@@ -1,4 +1,4 @@
-/*      $NetBSD: opms.c,v 1.1.8.2 2002/06/23 17:41:31 jdolecek Exp $        */
+/*      $NetBSD: opms.c,v 1.1.8.3 2002/06/23 18:16:19 jdolecek Exp $        */
 
 /*
  * Copyright 1997
@@ -977,3 +977,51 @@
     return (revents);
 } /* End opmspoll */
 
+static void
+filt_opmsrdetach(struct knote *kn)
+{
+       struct opms_softc *sc = (void *) kn->kn_hook;
+       int s;
+
+       s = spltty();
+       SLIST_REMOVE(&sc->sc_rsel.si_klist, kn, knote, kn_selnext);
+       splx(s);
+}
+
+static int
+filt_opmsread(struct knote *kn, long hint)
+{
+       struct opms_softc *sc = (void *) kn->kn_hook;
+
+       kn->kn_data = sc->sc_q.c_cc;
+       return (kn->kn_data > 0);
+}
+
+static const struct filterops opmsread_filtops =
+       { 1, NULL, filt_opmsrdetach, filt_opmsread };
+
+int
+opmskqfilter(dev_t dev, struct knote *kn)
+{
+       struct opms_softc *sc = opms_cd.cd_devs[PMSUNIT(dev)];
+       struct klist *klist;
+       int s;
+
+       switch (kn->kn_filter) {
+       case EVFILT_READ:
+               klist = &sc->sc_rsel.si_klist;
+               kn->kn_fop = &opmsread_filtops;
+               break;
+
+       default:
+               return (1);
+       }
+
+       kn->kn_hook = (void *) sc;
+
+       s = spltty();
+       SLIST_INSERT_HEAD(klist, kn, kn_selnext);
+       splx(s);
+
+       return (0);
+}