| 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 bool null_chr_open(Chardev *chr, ChardevBackend *backend, Error **errp) |
| 30 | { |
| 31 | return true; |
| 32 | } |
| 33 | |
| 34 | static void char_null_class_init(ObjectClass *oc, const void *data) |
| 35 | { |
| 36 | ChardevClass *cc = CHARDEV_CLASS(oc); |
| 37 | |
| 38 | cc->chr_open = null_chr_open; |
| 39 | } |
| 40 | |
| 41 | static const TypeInfo char_null_type_info = { |
| 42 | .name = TYPE_CHARDEV_NULL, |
| 43 | .parent = TYPE_CHARDEV, |
| 44 | .instance_size = sizeof(Chardev), |
| 45 | .class_init = char_null_class_init, |
| 46 | }; |
| 47 | |
| 48 | static void register_types(void) |
| 49 | { |
| 50 | type_register_static(&char_null_type_info); |
| 51 | } |
| 52 | |
| 53 | type_init(register_types); |