Programming Tips - Windows/C/C++: Get number of milliseconds since 1970 (the epoch)

Date: 2021dec30 Language: C/C++ Platform: win322 Q. Windows/C/C++: Get number of milliseconds since 1970 (the epoch) A. The same as Java's System.currentTimeMillis()
#include <time.h> // This gives the clock milliseconds in 0..999 static WORD CurrentMilliseconds() { SYSTEMTIME st; SYSTEMTIME lst; GetSystemTime(&st); SystemTimeToTzSpecificLocalTime(NULL, &st, &lst); return lst.wMilliseconds; } LONGLONG MillisecondsOfEpoch() { return (LONGLONG)time(NULL) * 1000LL + (LONGLONG)CurrentMilliseconds(); }
Bonus:
LONGLONG NanosecondsOfEpoch() { return MillisecondsOfEpoch() * 1000000LL; }