util/event_notifier-win32.c

   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                                bool is_external,
  37                                EventNotifierHandler *handler)
  38 {
  39     if (handler) {
  40         return qemu_add_wait_object(e->event, (IOHandler *)handler, e);
  41     } else {
  42         qemu_del_wait_object(e->event, (IOHandler *)handler, e);
  43         return 0;
  44     }
  45 }
  46
  47 int event_notifier_set(EventNotifier *e)
  48 {
  49     SetEvent(e->event);
  50     return 0;
  51 }
  52
  53 int event_notifier_test_and_clear(EventNotifier *e)
  54 {
  55     int ret = WaitForSingleObject(e->event, 0);
  56     if (ret == WAIT_OBJECT_0) {
  57         ResetEvent(e->event);
  58         return true;
  59     }
  60     return false;
  61 }