| /* |
| * Notifier lists |
| * |
| * Copyright IBM, Corp. 2010 |
| * |
| * Authors: |
| * Anthony Liguori <aliguori@us.ibm.com> |
| * |
| * This work is licensed under the terms of the GNU GPL, version 2. See |
| * the COPYING file in the top-level directory. |
| * |
| * Contributions after 2012-01-13 are licensed under the terms of the |
| * GNU GPL, version 2 or (at your option) any later version. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "qemu-common.h" |
| #include "qemu/notify.h" |
| #include "sysemu/sysemu.h" |
| |
| void notifier_list_init(NotifierList *list) |
| { |
| QLIST_INIT(&list->notifiers); |
| } |
| |
| void notifier_list_add(NotifierList *list, Notifier *notifier) |
| { |
| QLIST_INSERT_HEAD(&list->notifiers, notifier, node); |
| } |
| |
| void notifier_remove(Notifier *notifier) |
| { |
| QLIST_REMOVE(notifier, node); |
| } |
| |
| void notifier_list_notify(NotifierList *list, void *data) |
| { |
| Notifier *notifier, *next; |
| |
| QLIST_FOREACH_SAFE(notifier, &list->notifiers, node, next) { |
| notifier->notify(notifier, data); |
| } |
| } |
| |
| void notifier_with_return_list_init(NotifierWithReturnList *list) |
| { |
| QLIST_INIT(&list->notifiers); |
| } |
| |
| void notifier_with_return_list_add(NotifierWithReturnList *list, |
| NotifierWithReturn *notifier) |
| { |
| QLIST_INSERT_HEAD(&list->notifiers, notifier, node); |
| } |
| |
| void notifier_with_return_remove(NotifierWithReturn *notifier) |
| { |
| QLIST_REMOVE(notifier, node); |
| } |
| |
| int notifier_with_return_list_notify(NotifierWithReturnList *list, void *data) |
| { |
| NotifierWithReturn *notifier, *next; |
| int ret = 0; |
| |
| QLIST_FOREACH_SAFE(notifier, &list->notifiers, node, next) { |
| ret = notifier->notify(notifier, data); |
| if (ret != 0) { |
| break; |
| } |
| } |
| return ret; |
| } |
| |
| /* Implement exit notifiers here to make sure they are available for |
| * library users. |
| */ |
| static NotifierList exit_notifiers = |
| NOTIFIER_LIST_INITIALIZER(exit_notifiers); |
| |
| void qemu_exit_notifiers_notify(void) |
| { |
| notifier_list_notify(&exit_notifiers, NULL); |
| notifier_list_init(&exit_notifiers); |
| } |
| |
| void qemu_add_exit_notifier(Notifier *notify) |
| { |
| if (exit_notifiers.notifiers.lh_first == NULL) { |
| atexit(qemu_exit_notifiers_notify); |
| } |
| notifier_list_add(&exit_notifiers, notify); |
| } |
| |
| void qemu_remove_exit_notifier(Notifier *notify) |
| { |
| notifier_remove(notify); |
| } |