xref: /openbmc/qemu/util/event_notifier-win32.c (revision 7ef295ea)
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/osdep.h"
14 #include "qemu-common.h"
15 #include "qemu/event_notifier.h"
16 #include "qemu/main-loop.h"
17 
18 int event_notifier_init(EventNotifier *e, int active)
19 {
20     e->event = CreateEvent(NULL, TRUE, FALSE, NULL);
21     assert(e->event);
22     return 0;
23 }
24 
25 void event_notifier_cleanup(EventNotifier *e)
26 {
27     CloseHandle(e->event);
28 }
29 
30 HANDLE event_notifier_get_handle(EventNotifier *e)
31 {
32     return e->event;
33 }
34 
35 int event_notifier_set_handler(EventNotifier *e,
36                                EventNotifierHandler *handler)
37 {
38     if (handler) {
39         return qemu_add_wait_object(e->event, (IOHandler *)handler, e);
40     } else {
41         qemu_del_wait_object(e->event, (IOHandler *)handler, e);
42         return 0;
43     }
44 }
45 
46 int event_notifier_set(EventNotifier *e)
47 {
48     SetEvent(e->event);
49     return 0;
50 }
51 
52 int event_notifier_test_and_clear(EventNotifier *e)
53 {
54     int ret = WaitForSingleObject(e->event, 0);
55     if (ret == WAIT_OBJECT_0) {
56         ResetEvent(e->event);
57         return true;
58     }
59     return false;
60 }
61