+
+ memset(&tc, 0, sizeof(tc));
+ timeGetDevCaps(&tc, sizeof(tc));
+
+ if (data->period < tc.wPeriodMin)
+ data->period = tc.wPeriodMin;
+
+ timeBeginPeriod(data->period);
+
+ flags = TIME_CALLBACK_FUNCTION;
+ if (alarm_has_dynticks(t))
+ flags |= TIME_ONESHOT;
+ else
+ flags |= TIME_PERIODIC;
+
+ data->timerId = timeSetEvent(1, // interval (ms)
+ data->period, // resolution
+ host_alarm_handler, // function
+ (DWORD)t, // parameter
+ flags);
+
+ if (!data->timerId) {
+ perror("Failed to initialize win32 alarm timer");
+
+ timeEndPeriod(data->period);
+ CloseHandle(data->host_alarm);
+ return -1;
+ }
+
+ qemu_add_wait_object(data->host_alarm, NULL, NULL);
+
+ return 0;
+}
+
+static void win32_stop_timer(struct qemu_alarm_timer *t)
+{
+ struct qemu_alarm_win32 *data = t->priv;
+
+ timeKillEvent(data->timerId);
+ timeEndPeriod(data->period);
+
+ CloseHandle(data->host_alarm);
+}
+
+static void win32_rearm_timer(struct qemu_alarm_timer *t)
+{
+ struct qemu_alarm_win32 *data = t->priv;
+ uint64_t nearest_delta_us;
+
+ if (!active_timers[QEMU_TIMER_REALTIME] &&
+ !active_timers[QEMU_TIMER_VIRTUAL])
+ return;
+
+ nearest_delta_us = qemu_next_deadline();
+ nearest_delta_us /= 1000;
+
+ timeKillEvent(data->timerId);
+
+ data->timerId = timeSetEvent(1,
+ data->period,
+ host_alarm_handler,
+ (DWORD)t,
+ TIME_ONESHOT | TIME_PERIODIC);
+
+ if (!data->timerId) {
+ perror("Failed to re-arm win32 alarm timer");
+
+ timeEndPeriod(data->period);
+ CloseHandle(data->host_alarm);
+ exit(1);
+ }
+}
+
+#endif /* _WIN32 */
+
+static void init_timer_alarm(void)
+{
+ struct qemu_alarm_timer *t;
+ int i, err = -1;
+
+ for (i = 0; alarm_timers[i].name; i++) {
+ t = &alarm_timers[i];
+
+ err = t->start(t);
+ if (!err)
+ break;
+ }
+
+ if (err) {
+ fprintf(stderr, "Unable to find any suitable alarm timer.\n");
+ fprintf(stderr, "Terminating\n");
+ exit(1);
+ }
+
+ alarm_timer = t;
+}
+
+void quit_timers(void)
+{
+ alarm_timer->stop(alarm_timer);
+ alarm_timer = NULL;