-allow the "show_screen" call to the display driver to complete
asynchronously, in the same style like the process attach/detach functions -intercept the "cnpollc" call which originally went directly to the keyboard driver and keep track whether the console is in "polling" state (DDB!) -pass a NULL callback to the screen switcher and the process attach/detach functions if the console is "polling", to tell them that asynchronous completion is forbidden
This commit is contained in:
drochner
parent
c9457413cb
commit
8996199a85
@ -1,4 +1,4 @@
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/* $NetBSD: wsdisplay.c,v 1.32 1999/12/01 23:22:59 augustss Exp $ */
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/* $NetBSD: wsdisplay.c,v 1.33 1999/12/06 18:52:23 drochner Exp $ */
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/*
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* Copyright (c) 1996, 1997 Christopher G. Demetriou. All rights reserved.
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@ -33,7 +33,7 @@
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static const char _copyright[] __attribute__ ((unused)) =
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"Copyright (c) 1996, 1997 Christopher G. Demetriou. All rights reserved.";
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static const char _rcsid[] __attribute__ ((unused)) =
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"$NetBSD: wsdisplay.c,v 1.32 1999/12/01 23:22:59 augustss Exp $";
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"$NetBSD: wsdisplay.c,v 1.33 1999/12/06 18:52:23 drochner Exp $";
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#include <sys/param.h>
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#include <sys/conf.h>
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@ -199,11 +199,14 @@ static struct wsdisplay_softc *wsdisplay_console_device;
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static struct wsscreen_internal wsdisplay_console_conf;
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static int wsdisplay_getc_dummy __P((dev_t));
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static void wsdisplay_pollc_dummy __P((dev_t, int));
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static void wsdisplay_pollc __P((dev_t, int));
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static int wsdisplay_cons_pollmode;
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static void (*wsdisplay_cons_kbd_pollc) __P((dev_t, int));
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static struct consdev wsdisplay_cons = {
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NULL, NULL, wsdisplay_getc_dummy, wsdisplay_cnputc,
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wsdisplay_pollc_dummy, NODEV, CN_NORMAL
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wsdisplay_pollc, NODEV, CN_NORMAL
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};
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#ifndef WSDISPLAY_DEFAULTSCREENS
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@ -212,6 +215,7 @@ static struct consdev wsdisplay_cons = {
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int wsdisplay_defaultscreens = WSDISPLAY_DEFAULTSCREENS;
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int wsdisplay_switch1 __P((void *, int, int));
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int wsdisplay_switch2 __P((void *, int, int));
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int wsdisplay_switch3 __P((void *, int, int));
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int wsdisplay_clearonclose;
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@ -378,7 +382,8 @@ wsdisplay_addscreen(sc, idx, screentype, emul)
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s = spltty();
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if (!sc->sc_focus) {
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(*sc->sc_accessops->show_screen)(sc->sc_accesscookie,
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scr->scr_dconf->emulcookie);
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scr->scr_dconf->emulcookie,
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0, 0, 0);
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sc->sc_focusidx = idx;
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sc->sc_focus = scr;
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}
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@ -1405,6 +1410,65 @@ wsdisplay_switch3(arg, error, waitok)
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return (error);
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}
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int
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wsdisplay_switch2(arg, error, waitok)
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void *arg;
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int error, waitok;
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{
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struct wsdisplay_softc *sc = arg;
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int no;
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struct wsscreen *scr;
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if (!(sc->sc_flags & SC_SWITCHPENDING)) {
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printf("wsdisplay_switch2: not switching\n");
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return (EINVAL);
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}
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no = sc->sc_screenwanted;
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if (no < 0 || no >= WSDISPLAY_MAXSCREEN)
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panic("wsdisplay_switch2: invalid screen %d", no);
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scr = sc->sc_scr[no];
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if (!scr) {
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printf("wsdisplay_switch2: screen %d disappeared\n", no);
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error = ENXIO;
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}
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if (error) {
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/* try to recover, avoid recursion */
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if (sc->sc_oldscreen == -1) {
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printf("wsdisplay_switch2: giving up\n");
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sc->sc_focus = 0;
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sc->sc_flags &= ~SC_SWITCHPENDING;
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return (error);
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}
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sc->sc_screenwanted = sc->sc_oldscreen;
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sc->sc_oldscreen = -1;
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return (wsdisplay_switch1(arg, 0, waitok));
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}
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sc->sc_focusidx = no;
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sc->sc_focus = scr;
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#ifdef WSDISPLAY_COMPAT_RAWKBD
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(void) wsdisplay_update_rawkbd(sc, scr);
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#endif
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/* keyboard map??? */
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#define wsswitch_cb3 ((void (*) __P((void *, int, int)))wsdisplay_switch3)
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if (scr->scr_syncops) {
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error = (*scr->scr_syncops->attach)(scr->scr_synccookie, waitok,
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sc->sc_isconsole && wsdisplay_cons_pollmode ? 0 : wsswitch_cb3, sc);
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if (error == EAGAIN) {
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/* switch will be done asynchronously */
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return (0);
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}
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}
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return (wsdisplay_switch3(sc, error, waitok));
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}
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int
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wsdisplay_switch1(arg, error, waitok)
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void *arg;
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@ -1433,27 +1497,17 @@ wsdisplay_switch1(arg, error, waitok)
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return (error);
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}
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(*sc->sc_accessops->show_screen)(sc->sc_accesscookie,
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scr->scr_dconf->emulcookie);
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sc->sc_focusidx = no;
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sc->sc_focus = scr;
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#ifdef WSDISPLAY_COMPAT_RAWKBD
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(void) wsdisplay_update_rawkbd(sc, scr);
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#endif
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/* keyboard map??? */
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#define wsswitch_cb3 ((void (*) __P((void *, int, int)))wsdisplay_switch3)
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if (scr->scr_syncops) {
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error = (*scr->scr_syncops->attach)(scr->scr_synccookie, waitok,
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wsswitch_cb3, sc);
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if (error == EAGAIN) {
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/* switch will be done asynchronously */
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return (0);
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}
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#define wsswitch_cb2 ((void (*) __P((void *, int, int)))wsdisplay_switch2)
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error = (*sc->sc_accessops->show_screen)(sc->sc_accesscookie,
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scr->scr_dconf->emulcookie,
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waitok,
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sc->sc_isconsole && wsdisplay_cons_pollmode ? 0 : wsswitch_cb2, sc);
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if (error == EAGAIN) {
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/* switch will be done asynchronously */
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return (0);
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}
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return (wsdisplay_switch3(sc, error, waitok));
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return (wsdisplay_switch2(sc, error, waitok));
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}
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int
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@ -1495,7 +1549,7 @@ wsdisplay_switch(dev, no, waitok)
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#define wsswitch_cb1 ((void (*) __P((void *, int, int)))wsdisplay_switch1)
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if (scr->scr_syncops) {
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res = (*scr->scr_syncops->detach)(scr->scr_synccookie, waitok,
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wsswitch_cb1, sc);
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sc->sc_isconsole && wsdisplay_cons_pollmode ? 0 : wsswitch_cb1, sc);
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if (res == EAGAIN) {
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/* switch will be done asynchronously */
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return (0);
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@ -1697,10 +1751,15 @@ wsdisplay_getc_dummy(dev)
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}
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static void
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wsdisplay_pollc_dummy(dev, on)
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wsdisplay_pollc(dev, on)
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dev_t dev;
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int on;
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{
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wsdisplay_cons_pollmode = on;
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if (wsdisplay_cons_kbd_pollc)
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(*wsdisplay_cons_kbd_pollc)(dev, on);
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}
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void
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@ -1709,14 +1768,14 @@ wsdisplay_set_cons_kbd(get, poll)
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void (*poll) __P((dev_t, int));
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{
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wsdisplay_cons.cn_getc = get;
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wsdisplay_cons.cn_pollc = poll;
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wsdisplay_cons_kbd_pollc = poll;
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}
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void
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wsdisplay_unset_cons_kbd()
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{
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wsdisplay_cons.cn_getc = wsdisplay_getc_dummy;
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wsdisplay_cons.cn_pollc = wsdisplay_pollc_dummy;
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wsdisplay_cons_kbd_pollc = 0;
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}
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/*
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@ -1,4 +1,4 @@
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/* $NetBSD: wsdisplay_compat_usl.c,v 1.10 1999/10/19 00:03:18 mycroft Exp $ */
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/* $NetBSD: wsdisplay_compat_usl.c,v 1.11 1999/12/06 18:52:23 drochner Exp $ */
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/*
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* Copyright (c) 1998
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@ -172,6 +172,10 @@ usl_detachproc(cookie, waitok, callback, cbarg)
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if (!usl_sync_check(sd))
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return (0);
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/* we really need a callback */
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if (!callback)
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return (EINVAL);
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/*
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* Normally, this is called from the controlling process.
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* Is is supposed to reply with a VT_RELDISP ioctl(), so
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@ -238,6 +242,10 @@ usl_attachproc(cookie, waitok, callback, cbarg)
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if (!usl_sync_check(sd))
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return (0);
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/* we really need a callback */
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if (!callback)
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return (EINVAL);
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sd->s_callback = callback;
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sd->s_cbarg = cbarg;
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sd->s_flags |= SF_ATTACHPENDING;
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@ -1,4 +1,4 @@
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/* $NetBSD: wsdisplayvar.h,v 1.13 1999/10/19 00:03:18 mycroft Exp $ */
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/* $NetBSD: wsdisplayvar.h,v 1.14 1999/12/06 18:52:23 drochner Exp $ */
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/*
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* Copyright (c) 1996, 1997 Christopher G. Demetriou. All rights reserved.
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@ -107,7 +107,8 @@ struct wsdisplay_accessops {
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int (*alloc_screen) __P((void *, const struct wsscreen_descr *,
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void **, int *, int *, long *));
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void (*free_screen) __P((void *, void *));
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void (*show_screen) __P((void *, void *));
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int (*show_screen) __P((void *, void *, int,
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void (*) (void *, int, int), void *));
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int (*load_font) __P((void *, void *, struct wsdisplay_font *));
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};
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