LXR qemu/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
  18int 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
  25void event_notifier_cleanup(EventNotifier *e)
  26{
  27    CloseHandle(e->event);
  28}
  29
  30HANDLE event_notifier_get_handle(EventNotifier *e)
  31{
  32    return e->event;
  33}
  34
  35int 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
  47int event_notifier_set(EventNotifier *e)
  48{
  49    SetEvent(e->event);
  50    return 0;
  51}
  52
  53int 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}
  62