Merge tag 'pull-request-2022-09-28' of https://gitlab.com/thuth/qemu into staging
[qemu.git] / 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
19 void notifier_list_init(NotifierList *list)
20 {
21 QLIST_INIT(&list->notifiers);
22 }
23
24 void notifier_list_add(NotifierList *list, Notifier *notifier)
25 {
26 QLIST_INSERT_HEAD(&list->notifiers, notifier, node);
27 }
28
29 void notifier_remove(Notifier *notifier)
30 {
31 QLIST_REMOVE(notifier, node);
32 }
33
34 void 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
43 bool notifier_list_empty(NotifierList *list)
44 {
45 return QLIST_EMPTY(&list->notifiers);
46 }
47
48 void notifier_with_return_list_init(NotifierWithReturnList *list)
49 {
50 QLIST_INIT(&list->notifiers);
51 }
52
53 void notifier_with_return_list_add(NotifierWithReturnList *list,
54 NotifierWithReturn *notifier)
55 {
56 QLIST_INSERT_HEAD(&list->notifiers, notifier, node);
57 }
58
59 void notifier_with_return_remove(NotifierWithReturn *notifier)
60 {
61 QLIST_REMOVE(notifier, node);
62 }
63
64 int 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 }