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     e->cleanup = NULL;
  23     return 0;
  24 }
  25
  26 void event_notifier_cleanup(EventNotifier *e)
  27 {
  28     CloseHandle(e->event);
  29     e->event = NULL;
  30     e->cleanup = NULL;
  31 }
  32
  33 HANDLE event_notifier_get_handle(EventNotifier *e)
  34 {
  35     return e->event;
  36 }
  37
  38 int event_notifier_set(EventNotifier *e)
  39 {
  40     SetEvent(e->event);
  41     return 0;
  42 }
  43
  44 int event_notifier_test_and_clear(EventNotifier *e)
  45 {
  46     int ret = WaitForSingleObject(e->event, 0);
  47     if (ret == WAIT_OBJECT_0) {
  48         ResetEvent(e->event);
  49         return true;
  50     }
  51     return false;
  52 }