i need a real time clock in ansi c which provide an accuracy upto miliseconds?
i am working on windows a windows base lib is also acceptable thanx in advance.
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i need a real time clock in ansi c which provide an accuracy upto miliseconds?
i am working on windows a windows base lib is also acceptable thanx in advance.
You can’t do it with portable code prior to C11.
Starting with C11, you can use
timespec_get, which will often (but doesn’t necessarily) provide a resolution of milliseconds or better. Starting from C23, you can calltimespec_getresto find out the resolution provided.Since you’re using Windows, you need to start out aware that Windows isn’t a real-time system, so nothing you do is really guaranteed to be accurate. That said, you can start with
timeBeginPeriod(1);to set the multimedia timer resolution to 1 millisecond. You can then calltimeGetTime()to retrieve the current time with 1 ms resolution. When you’re done doing timing, you calltimeEndPeriod(1)to set the timer resolution back to the default.