time in microseconds

[stevocz]

Hi.
How can i get current time in microseconds but from 1.january.0001. something as .NET MinValue

i found only this solution.
std::chrono::time_point<std::chrono::steady_clock> ts = std::chrono::steady_clock::now();
std::chrono::duration_cast<std::chrono::microsecon ds>(ts.time_since_epoch()).count()+621355968000000 00);

[Killian]

Well, that's not really a Qt-related question, is it? ;-)

Most timers are not really accurate down to microseconds. For using chrono I recommend reading this: http://www.informit.com/articles/art...81386&seqNum=2
You could also have a look at QueryPerformanceFrequency and QueryPerformanceCounter which I find to be more easy-to-use (but at the cost of platform dependency).

[stevocz]

is not really Qt. but i must run this app on SLES 11 SP3 with QT4.6 and there missing chrono. I need find different solution.

[Camryn64]

interesting.. want to know the answer

[anda_skoa]

If you were looking for milliseconds, that would be easy with QDateTime::msecsTo().

Cheers,
_

[stevocz]

QDateTime::msecsTo() is not awailable in QT4.6, only QTime::msecsTo().

[anda_skoa]

You could do the same as the Qt5 implementation does;
https://code.woboq.org/qt5/qtbase/sr...e7msecsToERKS_

Cheers,
_

[stevocz]

but there is in milliseconds not microseconds

[anda_skoa]

but there is in milliseconds not microseconds

How could I have missed that?
Oh, wait, I didn't.

If you were looking for milliseconds

Though you could just multiply by 1000, as Killian already pointed out it is unlikely that the system has microseconds precision at all.

Cheers,
_

[stevocz]

sorry. my mistake