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// https://www.boost.org/doc/libs/1_67_0/doc/html/atomic/usage_examples.html#boost_atomic.usage_examples.example_ringbuffer
#include <boost/chrono.hpp>
#include <boost/type_traits.hpp>
#include <iostream>
using namespace boost::chrono;
template <class To, class Rep, class Period>
To round_up(boost::chrono::duration<Rep, Period> d)
{
To result = boost::chrono::duration_cast<To>(d);
if (result < d)
++result;
return result;
}
struct xtime
{
long sec;
unsigned long usec;
};
template <class Rep, class Period>
xtime to_xtime_truncate(boost::chrono::duration<Rep, Period> d)
{
xtime xt;
xt.sec = static_cast<long>(boost::chrono::duration_cast<seconds>(d).count());
xt.usec = static_cast<long>(boost::chrono::duration_cast<microseconds>(d - seconds(xt.sec)).count());
return xt;
}
template <class Rep, class Period>
xtime to_xtime_round_up(boost::chrono::duration<Rep, Period> d)
{
xtime xt;
xt.sec = static_cast<long>(boost::chrono::duration_cast<seconds>(d).count());
xt.usec = static_cast<unsigned long>(round_up<boost::chrono::microseconds>(d - boost::chrono::seconds(xt.sec)).count());
return xt;
}
microseconds
from_xtime(xtime xt)
{
return boost::chrono::seconds(xt.sec) + boost::chrono::microseconds(xt.usec);
}
void print(xtime xt)
{
std::cout << '{' << xt.sec << ',' << xt.usec << "}\n";
}
int main()
{
xtime xt = to_xtime_truncate(seconds(3) + boost::chrono::milliseconds(251));
print(xt);
boost::chrono::milliseconds ms = boost::chrono::duration_cast<boost::chrono::milliseconds>(from_xtime(xt));
std::cout << ms.count() << " milliseconds\n";
xt = to_xtime_round_up(ms);
print(xt);
xt = to_xtime_truncate(boost::chrono::seconds(3) + nanoseconds(999));
print(xt);
xt = to_xtime_round_up(boost::chrono::seconds(3) + nanoseconds(999));
print(xt);
}
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