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