1 | /* $NetBSD: wsemulconf.c,v 1.8 2010/02/02 16:18:29 drochner Exp $ */ |
2 | |
3 | /* |
4 | * Copyright (c) 1996, 1997 Christopher G. Demetriou. All rights reserved. |
5 | * |
6 | * Redistribution and use in source and binary forms, with or without |
7 | * modification, are permitted provided that the following conditions |
8 | * are met: |
9 | * 1. Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * 2. Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
14 | * 3. All advertising materials mentioning features or use of this software |
15 | * must display the following acknowledgement: |
16 | * This product includes software developed by Christopher G. Demetriou |
17 | * for the NetBSD Project. |
18 | * 4. The name of the author may not be used to endorse or promote products |
19 | * derived from this software without specific prior written permission |
20 | * |
21 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
22 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
23 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
24 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
25 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
26 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
27 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
28 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
30 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
31 | */ |
32 | |
33 | #include <sys/cdefs.h> |
34 | __KERNEL_RCSID(0, "$NetBSD: wsemulconf.c,v 1.8 2010/02/02 16:18:29 drochner Exp $" ); |
35 | |
36 | #include <sys/param.h> |
37 | #include <sys/systm.h> |
38 | #include <sys/malloc.h> |
39 | |
40 | #include <dev/wscons/wsconsio.h> |
41 | #include <dev/wscons/wsdisplayvar.h> |
42 | #include <dev/wscons/wsksymvar.h> |
43 | #include <dev/wscons/wsemulvar.h> /* pulls in opt_wsemul.h */ |
44 | #include <dev/wscons/wscons_callbacks.h> |
45 | |
46 | struct wsemulentry { |
47 | const struct wsemul_ops *ops; |
48 | int usecnt; |
49 | LIST_ENTRY(wsemulentry) next; |
50 | }; |
51 | static LIST_HEAD(, wsemulentry) wsemuls = LIST_HEAD_INITIALIZER(&wsemuls); |
52 | |
53 | static const struct wsemul_ops *wsemul_conf[] = { |
54 | #ifdef WSEMUL_SUN |
55 | &wsemul_sun_ops, |
56 | #endif |
57 | #ifdef WSEMUL_VT100 |
58 | &wsemul_vt100_ops, |
59 | #endif |
60 | #ifndef WSEMUL_NO_DUMB |
61 | &wsemul_dumb_ops, |
62 | #endif |
63 | NULL |
64 | }; |
65 | |
66 | const struct wsemul_ops * |
67 | wsemul_pick(const char *name) |
68 | { |
69 | const struct wsemul_ops **ops; |
70 | struct wsemulentry *wep; |
71 | |
72 | if (name == NULL) { |
73 | /* default */ |
74 | #ifdef WSEMUL_DEFAULT |
75 | name = WSEMUL_DEFAULT; |
76 | #else |
77 | return (wsemul_conf[0]); |
78 | #endif |
79 | } |
80 | |
81 | LIST_FOREACH(wep, &wsemuls, next) |
82 | if (!strcmp(name, wep->ops->name)) { |
83 | wep->usecnt++; |
84 | return wep->ops; |
85 | } |
86 | |
87 | for (ops = &wsemul_conf[0]; *ops != NULL; ops++) |
88 | if (strcmp(name, (*ops)->name) == 0) |
89 | break; |
90 | |
91 | return (*ops); |
92 | } |
93 | |
94 | void |
95 | wsemul_drop(const struct wsemul_ops *ops) |
96 | { |
97 | struct wsemulentry *wep; |
98 | |
99 | LIST_FOREACH(wep, &wsemuls, next) |
100 | if (ops == wep->ops) { |
101 | wep->usecnt--; |
102 | return; |
103 | } |
104 | } |
105 | |
106 | int |
107 | wsemul_add(const struct wsemul_ops *ops) |
108 | { |
109 | struct wsemulentry *wep; |
110 | |
111 | wep = malloc(sizeof (struct wsemulentry), M_DEVBUF, M_WAITOK); |
112 | wep->ops = ops; |
113 | wep->usecnt = 0; |
114 | LIST_INSERT_HEAD(&wsemuls, wep, next); |
115 | return 0; |
116 | } |
117 | |
118 | int |
119 | wsemul_remove(const struct wsemul_ops *ops) |
120 | { |
121 | struct wsemulentry *wep; |
122 | |
123 | LIST_FOREACH(wep, &wsemuls, next) { |
124 | if (ops == wep->ops) { |
125 | if (wep->usecnt) |
126 | return EBUSY; |
127 | LIST_REMOVE(wep, next); |
128 | return 0; |
129 | } |
130 | } |
131 | return ENOENT; |
132 | } |
133 | |