LXR qemu/chardev/char-null.c

   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
  29static void null_chr_open(Chardev *chr,
  30                          ChardevBackend *backend,
  31                          bool *be_opened,
  32                          Error **errp)
  33{
  34    *be_opened = false;
  35}
  36
  37static 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
  44static 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
  51static void register_types(void)
  52{
  53    type_register_static(&char_null_type_info);
  54}
  55
  56type_init(register_types);
  57