I've got a small problem caused by insufficient documentation of C++11.
I'd like to obtain a time since epoch in milliseconds, or nanoseconds or seconds and then I will have to "cast" this value to another resolution. I can do it using gettimeofday() but it will be to easy, so I tried to achieve it using std::chrono.
I tried:
std::chrono::time_point<std::chrono::system_clock> now =
std::chrono::system_clock::now();
But I have no idea what is a resolution of obtained in this way time_point, and I don't know how to get this time as a simple unsigned long long, and I haven't any conception how to cast it to another resolution.
You can do now.time_since_epoch()
to get a duration representing the time since the epoch, with the clock's resolution. To convert to milliseconds use duration_cast
:
auto duration = now.time_since_epoch();
auto millis = std::chrono::duration_cast<std::chrono::milliseconds>(duration).count();