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1/*
2 * event notifier support
3 *
4 * Copyright Red Hat, Inc. 2010
5 *
6 * Authors:
7 * Michael S. Tsirkin <mst@redhat.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2 or later.
10 * See the COPYING file in the top-level directory.
11 */
12
13#include "qemu-common.h"
14#include "event_notifier.h"
15#include "main-loop.h"
16
17int event_notifier_init(EventNotifier *e, int active)
18{
e9bff10f 19 e->event = CreateEvent(NULL, TRUE, FALSE, NULL);
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20 assert(e->event);
21 return 0;
22}
23
24void event_notifier_cleanup(EventNotifier *e)
25{
26 CloseHandle(e->event);
27}
28
29HANDLE event_notifier_get_handle(EventNotifier *e)
30{
31 return e->event;
32}
33
34int event_notifier_set_handler(EventNotifier *e,
35 EventNotifierHandler *handler)
36{
37 if (handler) {
38 return qemu_add_wait_object(e->event, (IOHandler *)handler, e);
39 } else {
40 qemu_del_wait_object(e->event, (IOHandler *)handler, e);
41 return 0;
42 }
43}
44
45int event_notifier_set(EventNotifier *e)
46{
47 SetEvent(e->event);
48 return 0;
49}
50
51int event_notifier_test_and_clear(EventNotifier *e)
52{
53 int ret = WaitForSingleObject(e->event, 0);
54 if (ret == WAIT_OBJECT_0) {
55 ResetEvent(e->event);
56 return true;
57 }
58 return false;
59}