static void PrintDateTimeWithMilliSeconds(void)
{
const system_clock::time_point now = system_clock::now();
system_clock::duration tp = now.time_since_epoch();
tp -= duration_cast<seconds>(tp);
const time_t tt = system_clock::to_time_t(now);
const tm t = *localtime(&tt);
printf("%04u-%02u-%02u %02u:%02u:%02u.%03u",
t.tm_year + 1900,
t.tm_mon + 1,
t.tm_mday,
t.tm_hour,
t.tm_min,
t.tm_sec,
static_cast<unsigned>(tp/ milliseconds(1)));
}
long long getTimeInMs(system_clock::time_point &point) {
auto millitime = std::chrono::duration_cast<milliseconds>(point.time_since_epoch()).count();
return millitime;
}
std::time_t system_clock::to_time_t(const system_clock::time_point& t)
{
return static_cast<std::time_t>( t.time_since_epoch().count() / 1000000000 );
}