How to get current time as long or ulong?

[yawniek via Digitalmars-d-learn]

On Tuesday, 5 July 2016 at 18:16:31 UTC, Charles Hixson wrote:
> What I'm looking for is the opposite of the "FromUnixTime" 
> function.

i often use

long toNsUnixTime(SysTime t)
{
   return (t.stdTime - 621_355_968_000_000_000L)*100;
}
as a helper. any chance that something like this can be put into 
phobos?
its needed to work with external libraries or network services 
that expect this format.