I'm kinda stuck. I'm working on an inter op library to glue C++ code that uses ptime with C# code that uses (of course) the .NET DateTime format. Since the system needs the outmost performance I'm looking for a way to use binary conversion. Conversion from .NET to ptime is easy since there is a from_ftime<> conversion method, however the other direction is somewhat blocked since no ptime to FILE_TIME conversion exists.

My current workaround is using ISO time strings but performance is somewhat dismal since there is a lot of string <> binary conversion.

Does anyone know of a more straight forward (binary)way of converting? And just in case, using regular time_t as common denominator is not an option since at leas millisecond resolution is required.