#ifdef _WIN32
static MMRESULT mm_timer;
-static unsigned mm_period;
+static TIMECAPS mm_tc;
static void CALLBACK mm_alarm_handler(UINT uTimerID, UINT uMsg,
DWORD_PTR dwUser, DWORD_PTR dw1,
static int mm_start_timer(struct qemu_alarm_timer *t)
{
- TIMECAPS tc;
+ timeGetDevCaps(&mm_tc, sizeof(mm_tc));
- memset(&tc, 0, sizeof(tc));
- timeGetDevCaps(&tc, sizeof(tc));
+ timeBeginPeriod(mm_tc.wPeriodMin);
- mm_period = tc.wPeriodMin;
- timeBeginPeriod(mm_period);
-
- mm_timer = timeSetEvent(1, /* interval (ms) */
- mm_period, /* resolution */
+ mm_timer = timeSetEvent(mm_tc.wPeriodMin, /* interval (ms) */
+ mm_tc.wPeriodMin, /* resolution */
mm_alarm_handler, /* function */
(DWORD_PTR)t, /* parameter */
TIME_ONESHOT | TIME_CALLBACK_FUNCTION);
if (!mm_timer) {
fprintf(stderr, "Failed to initialize win32 alarm timer: %ld\n",
GetLastError());
- timeEndPeriod(mm_period);
+ timeEndPeriod(mm_tc.wPeriodMin);
return -1;
}
static void mm_stop_timer(struct qemu_alarm_timer *t)
{
timeKillEvent(mm_timer);
- timeEndPeriod(mm_period);
+ timeEndPeriod(mm_tc.wPeriodMin);
}
static void mm_rearm_timer(struct qemu_alarm_timer *t, int64_t delta)
{
int64_t nearest_delta_ms = delta / 1000000;
- if (nearest_delta_ms < 1) {
- nearest_delta_ms = 1;
- }
- /* UINT_MAX can be 32 bit */
- if (nearest_delta_ms > UINT_MAX) {
- nearest_delta_ms = UINT_MAX;
+ if (nearest_delta_ms < mm_tc.wPeriodMin) {
+ nearest_delta_ms = mm_tc.wPeriodMin;
+ } else if (nearest_delta_ms > mm_tc.wPeriodMax) {
+ nearest_delta_ms = mm_tc.wPeriodMax;
}
timeKillEvent(mm_timer);
- mm_timer = timeSetEvent((unsigned int) nearest_delta_ms,
- mm_period,
+ mm_timer = timeSetEvent((UINT)nearest_delta_ms,
+ mm_tc.wPeriodMin,
mm_alarm_handler,
(DWORD_PTR)t,
TIME_ONESHOT | TIME_CALLBACK_FUNCTION);
fprintf(stderr, "Failed to re-arm win32 alarm timer %ld\n",
GetLastError());
- timeEndPeriod(mm_period);
+ timeEndPeriod(mm_tc.wPeriodMin);
exit(1);
}
}