// timeBeginPeriod 사용
// 1ms 까지 설정가능
// 0.5ms Resolution 필요 시 NtSetTimerResolution 사용
#define TARGET_RESOLUTION 1 // 1-millisecond target resolution
TIMECAPS tc;
UINT wTimerRes;
if (timeGetDevCaps(&tc, sizeof(TIMECAPS)) != TIMERR_NOERROR)
{
// Error; application can't continue.
}
wTimerRes = min(max(tc.wPeriodMin, TARGET_RESOLUTION), tc.wPeriodMax);
timeBeginPeriod(wTimerRes);
// do your stuff here at approx. 1 ms timer resolution
timeEndPeriod(wTimerRes);
[DllImport("ntdll.dll", SetLastError = true)]
private static extern NtStatus NtSetTimerResolution(
uint DesiredResolution,
bool SetResolution,
ref uint CurrentResolution);
public static float SetTimerResolution(uint timerResolutionIn100nsUnits, bool doSet = true)
{
// 입출력값의 단위는 100ns
// 1ms로 변경 시 SetTimerResolution(10000);
// Enum NtStatus 는 별도 정의, 불필요 시 int로 대체
uint currentRes_100ns = 0;
var result = NtSetTimerResolution(timerResolutionIn100nsUnits, doSet, ref currentRes_100ns);
return currentRes_100ns;
}