46 lines
1,013 B
Go
46 lines
1,013 B
Go
package hdrhistogram
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// A WindowedHistogram combines histograms to provide windowed statistics.
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type WindowedHistogram struct {
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idx int
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h []Histogram
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m *Histogram
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Current *Histogram
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}
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// NewWindowed creates a new WindowedHistogram with N underlying histograms with
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// the given parameters.
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func NewWindowed(n int, minValue, maxValue int64, sigfigs int) *WindowedHistogram {
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w := WindowedHistogram{
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idx: -1,
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h: make([]Histogram, n),
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m: New(minValue, maxValue, sigfigs),
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}
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for i := range w.h {
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w.h[i] = *New(minValue, maxValue, sigfigs)
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}
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w.Rotate()
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return &w
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}
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// Merge returns a histogram which includes the recorded values from all the
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// sections of the window.
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func (w *WindowedHistogram) Merge() *Histogram {
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w.m.Reset()
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for _, h := range w.h {
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w.m.Merge(&h)
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}
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return w.m
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}
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// Rotate resets the oldest histogram and rotates it to be used as the current
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// histogram.
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func (w *WindowedHistogram) Rotate() {
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w.idx++
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w.Current = &w.h[w.idx%len(w.h)]
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w.Current.Reset()
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}
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