Qt microseconds timer implementation

Question

In Qt all the Classes are having Milliseconds timer . I need to implement Microsecond timer using hardware timer or any Qt classes will not support for Microsecond timer.

Any one please help me how to implement microsecond timer in Qt application code?

You may want to look at this also: http://stackoverflow.com/questions/15730765/qt-high-resolution-timer — demonplus, Dec 22 '15 at 12:54
Your question is not clear. Do you wish to measure time with microsecond resolution, or do you wish to implement delays with such resolution? These would be very different problems. — Kuba hasn't forgotten Monica, Dec 22 '15 at 13:54

score 6 · Answer 1 · edited May 16 '17 at 11:11

6

You should use QElapsedTimer, wich has nanoseconds precision, as follows:

QElapsedTimer timer;
timer.start();

foo();//TODO your stuff

qDebug() << "The foo() function took" << timer.nsecsElapsed() << "nanoseconds";

edited May 16 '17 at 11:11

César HM

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answered Dec 22 '15 at 07:22

jpo38

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score 0 · Answer 2 · answered Dec 22 '15 at 07:25

0

I cannot comment so I post answer.

I think you can also use usleep() function from POSIX, just #include < unistd.h >.

Reference on this link .

answered Dec 22 '15 at 07:25

Junior

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That's not available under Windows. Does it? – jpo38 Dec 22 '15 at 07:35
@jpo38 You're right, but he did not tell us on which platfrom he works. – Junior Dec 22 '15 at 07:39
As far as I know usleep() is deprecated, new code should use nanosleep() instead. – Matthias Dieter Wallnöfer Sep 09 '16 at 07:38

Qt microseconds timer implementation

2 Answers2