LXR qemu/util/notify.c

   1/*
   2 * Notifier lists
   3 *
   4 * Copyright IBM, Corp. 2010
   5 *
   6 * Authors:
   7 *  Anthony Liguori   <aliguori@us.ibm.com>
   8 *
   9 * This work is licensed under the terms of the GNU GPL, version 2.  See
  10 * the COPYING file in the top-level directory.
  11 *
  12 * Contributions after 2012-01-13 are licensed under the terms of the
  13 * GNU GPL, version 2 or (at your option) any later version.
  14 */
  15
  16#include "qemu/osdep.h"
  17#include "qemu/notify.h"
  18
  19void notifier_list_init(NotifierList *list)
  20{
  21    QLIST_INIT(&list->notifiers);
  22}
  23
  24void notifier_list_add(NotifierList *list, Notifier *notifier)
  25{
  26    QLIST_INSERT_HEAD(&list->notifiers, notifier, node);
  27}
  28
  29void notifier_remove(Notifier *notifier)
  30{
  31    QLIST_REMOVE(notifier, node);
  32}
  33
  34void notifier_list_notify(NotifierList *list, void *data)
  35{
  36    Notifier *notifier, *next;
  37
  38    QLIST_FOREACH_SAFE(notifier, &list->notifiers, node, next) {
  39        notifier->notify(notifier, data);
  40    }
  41}
  42
  43bool notifier_list_empty(NotifierList *list)
  44{
  45    return QLIST_EMPTY(&list->notifiers);
  46}
  47
  48void notifier_with_return_list_init(NotifierWithReturnList *list)
  49{
  50    QLIST_INIT(&list->notifiers);
  51}
  52
  53void notifier_with_return_list_add(NotifierWithReturnList *list,
  54                                   NotifierWithReturn *notifier)
  55{
  56    QLIST_INSERT_HEAD(&list->notifiers, notifier, node);
  57}
  58
  59void notifier_with_return_remove(NotifierWithReturn *notifier)
  60{
  61    QLIST_REMOVE(notifier, node);
  62}
  63
  64int notifier_with_return_list_notify(NotifierWithReturnList *list, void *data)
  65{
  66    NotifierWithReturn *notifier, *next;
  67    int ret = 0;
  68
  69    QLIST_FOREACH_SAFE(notifier, &list->notifiers, node, next) {
  70        ret = notifier->notify(notifier, data);
  71        if (ret != 0) {
  72            break;
  73        }
  74    }
  75    return ret;
  76}
  77