54 lines
1003 B
Go
54 lines
1003 B
Go
package gcache
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import (
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"sync/atomic"
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)
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type statsAccessor interface {
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HitCount() uint64
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MissCount() uint64
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LookupCount() uint64
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HitRate() float64
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}
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// statistics
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type stats struct {
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hitCount uint64
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missCount uint64
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}
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// increment hit count
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func (st *stats) IncrHitCount() uint64 {
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return atomic.AddUint64(&st.hitCount, 1)
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}
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// increment miss count
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func (st *stats) IncrMissCount() uint64 {
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return atomic.AddUint64(&st.missCount, 1)
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}
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// HitCount returns hit count
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func (st *stats) HitCount() uint64 {
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return atomic.LoadUint64(&st.hitCount)
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}
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// MissCount returns miss count
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func (st *stats) MissCount() uint64 {
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return atomic.LoadUint64(&st.missCount)
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}
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// LookupCount returns lookup count
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func (st *stats) LookupCount() uint64 {
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return st.HitCount() + st.MissCount()
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}
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// HitRate returns rate for cache hitting
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func (st *stats) HitRate() float64 {
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hc, mc := st.HitCount(), st.MissCount()
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total := hc + mc
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if total == 0 {
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return 0.0
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}
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return float64(hc) / float64(total)
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}
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