1921d00aaf
(these are not available in early bootstrap, so this is not an option for the system's default emulation)
133 lines
3.6 KiB
C
133 lines
3.6 KiB
C
/* $NetBSD: wsemulconf.c,v 1.8 2010/02/02 16:18:29 drochner Exp $ */
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/*
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* Copyright (c) 1996, 1997 Christopher G. Demetriou. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Christopher G. Demetriou
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* for the NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: wsemulconf.c,v 1.8 2010/02/02 16:18:29 drochner Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <dev/wscons/wsconsio.h>
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#include <dev/wscons/wsdisplayvar.h>
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#include <dev/wscons/wsksymvar.h>
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#include <dev/wscons/wsemulvar.h> /* pulls in opt_wsemul.h */
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#include <dev/wscons/wscons_callbacks.h>
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struct wsemulentry {
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const struct wsemul_ops *ops;
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int usecnt;
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LIST_ENTRY(wsemulentry) next;
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};
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static LIST_HEAD(, wsemulentry) wsemuls = LIST_HEAD_INITIALIZER(&wsemuls);
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static const struct wsemul_ops *wsemul_conf[] = {
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#ifdef WSEMUL_SUN
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&wsemul_sun_ops,
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#endif
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#ifdef WSEMUL_VT100
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&wsemul_vt100_ops,
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#endif
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#ifndef WSEMUL_NO_DUMB
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&wsemul_dumb_ops,
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#endif
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NULL
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};
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const struct wsemul_ops *
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wsemul_pick(const char *name)
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{
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const struct wsemul_ops **ops;
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struct wsemulentry *wep;
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if (name == NULL) {
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/* default */
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#ifdef WSEMUL_DEFAULT
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name = WSEMUL_DEFAULT;
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#else
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return (wsemul_conf[0]);
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#endif
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}
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LIST_FOREACH(wep, &wsemuls, next)
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if (!strcmp(name, wep->ops->name)) {
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wep->usecnt++;
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return wep->ops;
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}
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for (ops = &wsemul_conf[0]; *ops != NULL; ops++)
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if (strcmp(name, (*ops)->name) == 0)
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break;
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return (*ops);
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}
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void
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wsemul_drop(const struct wsemul_ops *ops)
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{
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struct wsemulentry *wep;
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LIST_FOREACH(wep, &wsemuls, next)
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if (ops == wep->ops) {
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wep->usecnt--;
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return;
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}
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}
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int
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wsemul_add(const struct wsemul_ops *ops)
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{
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struct wsemulentry *wep;
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wep = malloc(sizeof (struct wsemulentry), M_DEVBUF, M_WAITOK);
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wep->ops = ops;
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wep->usecnt = 0;
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LIST_INSERT_HEAD(&wsemuls, wep, next);
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return 0;
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}
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int
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wsemul_remove(const struct wsemul_ops *ops)
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{
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struct wsemulentry *wep;
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LIST_FOREACH(wep, &wsemuls, next) {
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if (ops == wep->ops) {
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if (wep->usecnt)
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return EBUSY;
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LIST_REMOVE(wep, next);
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return 0;
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}
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}
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return ENOENT;
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}
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