LXR qemu/hw/core/reset.c

   1/*
   2 *  Reset handlers.
   3 *
   4 * Copyright (c) 2003-2008 Fabrice Bellard
   5 * Copyright (c) 2016 Red Hat, Inc.
   6 *
   7 * Permission is hereby granted, free of charge, to any person obtaining a copy
   8 * of this software and associated documentation files (the "Software"), to deal
   9 * in the Software without restriction, including without limitation the rights
  10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11 * copies of the Software, and to permit persons to whom the Software is
  12 * furnished to do so, subject to the following conditions:
  13 *
  14 * The above copyright notice and this permission notice shall be included in
  15 * all copies or substantial portions of the Software.
  16 *
  17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  23 * THE SOFTWARE.
  24 */
  25
  26#include "qemu/osdep.h"
  27#include "qemu/queue.h"
  28#include "sysemu/reset.h"
  29
  30/* reset/shutdown handler */
  31
  32typedef struct QEMUResetEntry {
  33    QTAILQ_ENTRY(QEMUResetEntry) entry;
  34    QEMUResetHandler *func;
  35    void *opaque;
  36} QEMUResetEntry;
  37
  38static QTAILQ_HEAD(reset_handlers, QEMUResetEntry) reset_handlers =
  39    QTAILQ_HEAD_INITIALIZER(reset_handlers);
  40
  41void qemu_register_reset(QEMUResetHandler *func, void *opaque)
  42{
  43    QEMUResetEntry *re = g_malloc0(sizeof(QEMUResetEntry));
  44
  45    re->func = func;
  46    re->opaque = opaque;
  47    QTAILQ_INSERT_TAIL(&reset_handlers, re, entry);
  48}
  49
  50void qemu_unregister_reset(QEMUResetHandler *func, void *opaque)
  51{
  52    QEMUResetEntry *re;
  53
  54    QTAILQ_FOREACH(re, &reset_handlers, entry) {
  55        if (re->func == func && re->opaque == opaque) {
  56            QTAILQ_REMOVE(&reset_handlers, re, entry);
  57            g_free(re);
  58            return;
  59        }
  60    }
  61}
  62
  63void qemu_devices_reset(void)
  64{
  65    QEMUResetEntry *re, *nre;
  66
  67    /* reset all devices */
  68    QTAILQ_FOREACH_SAFE(re, &reset_handlers, entry, nre) {
  69        re->func(re->opaque);
  70    }
  71}
  72
  73