char-null.c (1872B)
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);