public static bool CanUse()
{
TIMECAPS timeCaps = new TIMECAPS();
int result = WinMM.timeGetDevCaps(ref timeCaps, Marshal.SizeOf(timeCaps));
return(result != WinMM.TIMERR_NOERROR);
}
public static uint timeGetDevCaps(ref TIMECAPS timeCaps, uint sizeTimeCaps)
{
timeCaps = new TIMECAPS()
{
wPeriodMin = 10,
wPeriodMax = uint.MaxValue,
};
return(MidiWinApi.MMSYSERR_NOERROR);
}
static TimerAPI()
{
ourLock = new object();
var tc = new TIMECAPS();
timeGetDevCaps(ref tc, Marshal.SizeOf(tc));
ourMinPeriod = tc.periodMin;
ourMaxPeriod = tc.periodMax;
ourCurRequests = new List <int>();
}
/// <summary>
/// Function to reset the timer.
/// </summary>
public void Reset()
{
TIMECAPS caps = default(TIMECAPS);
if (_isHighResTimer)
{
if (Win32API.QueryPerformanceFrequency(out _frequency))
{
Win32API.QueryPerformanceCounter(out _startTime);
return;
}
_isHighResTimer = false;
}
if (_timePeriod > 0)
{
if (Win32API.timeEndPeriod(_timePeriod) == TimePeriodReturn.NoCanDo)
{
throw new Win32Exception(Resources.GOR_TIME_CANNOT_END);
}
}
else
{
if (Win32API.timeGetDevCaps(ref caps, DirectAccess.SizeOf <TIMECAPS>()) != 0)
{
throw new Win32Exception(Resources.GOR_TIME_CANNOT_BEGIN);
}
_timePeriod = caps.MinPeriod;
}
if (Win32API.timeBeginPeriod(_timePeriod) == TimePeriodReturn.NoCanDo)
{
throw new Win32Exception(Resources.GOR_TIME_CANNOT_BEGIN);
}
UsingLowResTimers = true;
_startTick = Environment.TickCount;
_startTime = Win32API.timeGetTime();
}
private static extern int timeGetDevCaps(ref TIMECAPS ptc, int cbtc);
public static extern uint timeGetDevCaps(ref TIMECAPS timeCaps, uint sizeTimeCaps);
public static extern int timeGetDevCaps(ref TIMECAPS ptc, int cbtc);
public static extern MMRESULT timeGetDevCaps(out TIMECAPS ptc, uint cbtc = 8);
