Getsystemtimepreciseasfiletime - Windows 7 //free\\

Windows 7, released in 2009, does not natively support GetSystemTimePreciseAsFileTime . The function is not available in the Windows 7 version of kernel32.dll . However, for applications requiring high-precision timing, Windows 7 provides alternative functions, such as GetSystemTime and QueryPerformanceCounter , which can be used to achieve similar results, albeit with lower precision.

GetSystemTimePreciseAsFileTime does one beautiful thing: It reads the from the underlying hardware (HPET or TSC) and converts it to UTC. On supported systems, it offers microsecond-level precision (though not necessarily accuracy—that’s a topic for another day). getsystemtimepreciseasfiletime windows 7

If you strictly require sub-millisecond precision on Windows 7, GetSystemTimeAsFileTime is often insufficient. Instead, you can combine it with QueryPerformanceCounter (QPC): Windows 7, released in 2009, does not natively

: This function retrieves the current system time in the SYSTEMTIME structure, which includes the year, month, day of the week, day, hour, minute, second, and millisecond. While it provides a coarser granularity than GetSystemTimePreciseAsFileTime , it is readily available on Windows 7. which includes the year

For context: 16ms is an eternity for a modern SSD operation or a network round trip. Logging an event with GetSystemTimeAsFileTime could place two packets separated by 5ms at the same timestamp .

: Some third-party libraries may offer similar functionality by leveraging other high-precision timing mechanisms available on Windows 7.

#include <Windows.h> #include <iostream>