Problem with <chrono>

Probably somebody can help me with a new library <chrono>

By some way when I'm trying get system time with nanoseconds for example I have this result:

9h 7m 55s 0ms 0us 0ns

In header:

#include <chrono>
#include <iostream>
#include <ctime>

I don't have any idea if something else is required...

Software used: Codeblocks
Compilator: GNU GCC
C++0x enabled

What's the problem that you're facing?

I'm expecting some numbers instead of zero in "0ms 0us 0ns". Seems like time is counted only till seconds.

I suggest that you post the smallest and simplest compilable program that demonstrates the problem.

Whole script:

Code:

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#include <chrono>
#include <iostream>
#include <ctime>


std::chrono::system_clock::duration duration_since_midnight() {
    auto now = std::chrono::system_clock::now();

    time_t tnow = std::chrono::system_clock::to_time_t(now);
    tm *date = std::localtime(&tnow);
    date->tm_hour = 0;
    date->tm_min = 0;
    date->tm_sec = 0;
    auto midnight = std::chrono::system_clock::from_time_t(std::mktime(date));

    return now-midnight;
}

int main()
{
    auto since_midnight = duration_since_midnight();

    auto hours = std::chrono::duration_cast<std::chrono::hours>(since_midnight);
    auto minutes = std::chrono::duration_cast<std::chrono::minutes>(since_midnight - hours);
    auto seconds = std::chrono::duration_cast<std::chrono::seconds>(since_midnight - hours - minutes);
    auto milliseconds = std::chrono::duration_cast<std::chrono::milliseconds>(since_midnight - hours - minutes - seconds);
    auto microseconds = std::chrono::duration_cast<std::chrono::microseconds>(since_midnight - hours - minutes - seconds - milliseconds);
    auto nanoseconds = std::chrono::duration_cast<std::chrono::nanoseconds>(since_midnight - hours - minutes - seconds - milliseconds - microseconds);

    std::cout << hours.count() << "h ";
    std::cout << minutes.count() << "m ";
    std::cout << seconds.count() << "s ";
    std::cout << milliseconds.count() << "ms ";
    std::cout << microseconds.count() << "us ";
    std::cout << nanoseconds.count() << "ns\n";

}

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Well, I am getting output like:

Code:

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15h 58m 43s 282ms 425us 0ns

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so this could just be platform dependent.

Seems like I was thinking about this also...
I test it on Windows XP and also on Windows 7...