1 | /* |
2 | * QEMU System Emulator |
3 | * |
4 | * Copyright (c) 2003-2008 Fabrice Bellard |
5 | * |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
7 | * of this software and associated documentation files (the "Software"), to deal |
8 | * in the Software without restriction, including without limitation the rights |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
10 | * copies of the Software, and to permit persons to whom the Software is |
11 | * furnished to do so, subject to the following conditions: |
12 | * |
13 | * The above copyright notice and this permission notice shall be included in |
14 | * all copies or substantial portions of the Software. |
15 | * |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
22 | * THE SOFTWARE. |
23 | */ |
24 | |
25 | #include "qemu/osdep.h" |
26 | #include "chardev/char.h" |
27 | #include "qemu/module.h" |
28 | |
29 | static void null_chr_open(Chardev *chr, |
30 | ChardevBackend *backend, |
31 | bool *be_opened, |
32 | Error **errp) |
33 | { |
34 | *be_opened = false; |
35 | } |
36 | |
37 | static void char_null_class_init(ObjectClass *oc, void *data) |
38 | { |
39 | ChardevClass *cc = CHARDEV_CLASS(oc); |
40 | |
41 | cc->open = null_chr_open; |
42 | } |
43 | |
44 | static const TypeInfo char_null_type_info = { |
45 | .name = TYPE_CHARDEV_NULL, |
46 | .parent = TYPE_CHARDEV, |
47 | .instance_size = sizeof(Chardev), |
48 | .class_init = char_null_class_init, |
49 | }; |
50 | |
51 | static void register_types(void) |
52 | { |
53 | type_register_static(&char_null_type_info); |
54 | } |
55 | |
56 | type_init(register_types); |
57 | |