// may throw InvalidOperationException, Win32Exception
public float NextValue()
{
CounterSample sample;
if (changed)
{
UpdateInfo();
}
GetSample(impl, false, out sample);
float val;
if (valid_old)
{
val = CounterSampleCalculator.ComputeCounterValue(old_sample, sample);
}
else
{
val = CounterSampleCalculator.ComputeCounterValue(sample);
}
valid_old = true;
old_sample = sample;
return(val);
}
// Get the next counter sample value.
public float NextValue()
{
return(CounterSampleCalculator
.ComputeCounterValue(NextSample()));
}
/// <devdoc>
/// Static functions to calculate the performance value off the samples
/// </devdoc>
public static float Calculate(CounterSample counterSample, CounterSample nextCounterSample)
{
return(CounterSampleCalculator.ComputeCounterValue(counterSample, nextCounterSample));
}