diff options
Diffstat (limited to '')
-rw-r--r-- | dependencies/pkg/mod/github.com/vbauerster/mpb/v6@v6.0.4/decor/moving_average.go | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/dependencies/pkg/mod/github.com/vbauerster/mpb/v6@v6.0.4/decor/moving_average.go b/dependencies/pkg/mod/github.com/vbauerster/mpb/v6@v6.0.4/decor/moving_average.go new file mode 100644 index 0000000..50ac9c3 --- /dev/null +++ b/dependencies/pkg/mod/github.com/vbauerster/mpb/v6@v6.0.4/decor/moving_average.go @@ -0,0 +1,68 @@ +package decor + +import ( + "sort" + "sync" + + "github.com/VividCortex/ewma" +) + +type threadSafeMovingAverage struct { + ewma.MovingAverage + mu sync.Mutex +} + +func (s *threadSafeMovingAverage) Add(value float64) { + s.mu.Lock() + s.MovingAverage.Add(value) + s.mu.Unlock() +} + +func (s *threadSafeMovingAverage) Value() float64 { + s.mu.Lock() + defer s.mu.Unlock() + return s.MovingAverage.Value() +} + +func (s *threadSafeMovingAverage) Set(value float64) { + s.mu.Lock() + s.MovingAverage.Set(value) + s.mu.Unlock() +} + +// NewThreadSafeMovingAverage converts provided ewma.MovingAverage +// into thread safe ewma.MovingAverage. +func NewThreadSafeMovingAverage(average ewma.MovingAverage) ewma.MovingAverage { + if tsma, ok := average.(*threadSafeMovingAverage); ok { + return tsma + } + return &threadSafeMovingAverage{MovingAverage: average} +} + +type medianWindow [3]float64 + +func (s *medianWindow) Len() int { return len(s) } +func (s *medianWindow) Swap(i, j int) { s[i], s[j] = s[j], s[i] } +func (s *medianWindow) Less(i, j int) bool { return s[i] < s[j] } + +func (s *medianWindow) Add(value float64) { + s[0], s[1] = s[1], s[2] + s[2] = value +} + +func (s *medianWindow) Value() float64 { + tmp := *s + sort.Sort(&tmp) + return tmp[1] +} + +func (s *medianWindow) Set(value float64) { + for i := 0; i < len(s); i++ { + s[i] = value + } +} + +// NewMedian is fixed last 3 samples median MovingAverage. +func NewMedian() ewma.MovingAverage { + return NewThreadSafeMovingAverage(new(medianWindow)) +} |