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-common.h"
  14 #include "qemu/event_notifier.h"
  15 #include "qemu/main-loop.h"
  16
  17 int event_notifier_init(EventNotifier *e, int active)
  18 {
  19     e->event = CreateEvent(NULL, TRUE, FALSE, NULL);
  20     assert(e->event);
  21     return 0;
  22 }
  23
  24 void event_notifier_cleanup(EventNotifier *e)
  25 {
  26     CloseHandle(e->event);
  27 }
  28
  29 HANDLE event_notifier_get_handle(EventNotifier *e)
  30 {
  31     return e->event;
  32 }
  33
  34 int 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
  45 int event_notifier_set(EventNotifier *e)
  46 {
  47     SetEvent(e->event);
  48     return 0;
  49 }
  50
  51 int 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 }