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Home/ Questions/Q 789211
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Editorial Team
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Editorial Team
Asked: May 14, 20262026-05-14T21:29:14+00:00 2026-05-14T21:29:14+00:00

timeGetTime seems to be quite good to query for system time. However, its return

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timeGetTime seems to be quite good to query for system time. However, its return value is 32-bit only, so it wraps around every 49 days approx.

It’s not too hard to detect the rollover in calling code, but it adds some complexity, and (worse) requires keeping a state.

Is there some replacement for timeGetTime that would not have this wrap-around problem (probably by returning a 64-bit value), and have roughly the same precision and cost?

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  1. Editorial Team
    Editorial Team
    2026-05-14T21:29:15+00:00Added an answer on May 14, 2026 at 9:29 pm

    Nope, tracking roll-over requires state. It can be as simple as just incrementing your own 64-bit counter on each callback.

    It is pretty unusual to want to track time periods to a resolution as low as 1 millisecond for up to 49 days. You’d have to worry that the accuracy is still there after such a long period. The next step is to use the clock, GetTickCount(64), GetSystemTimeAsFileTime have a resolution of 15.625 milliseconds and are kept accurate with a time server.

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