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package qml
import (
"sync"
)
var stats *Statistics
var statsMutex sync.Mutex
func Stats() (snapshot Statistics) {
statsMutex.Lock()
snapshot = *stats
statsMutex.Unlock()
return
}
func CollectStats(enabled bool) {
statsMutex.Lock()
if enabled {
if stats == nil {
stats = &Statistics{}
}
} else {
stats = nil
}
statsMutex.Unlock()
}
func ResetStats() {
statsMutex.Lock()
old := stats
stats = &Statistics{}
// These are absolute values:
stats.EnginesAlive = old.EnginesAlive
stats.ValuesAlive = old.ValuesAlive
statsMutex.Unlock()
return
}
type Statistics struct {
EnginesAlive int
ValuesAlive int
ConnectionsAlive int
}
func (stats *Statistics) enginesAlive(delta int) {
if stats != nil {
statsMutex.Lock()
stats.EnginesAlive += delta
statsMutex.Unlock()
}
}
func (stats *Statistics) valuesAlive(delta int) {
if stats != nil {
statsMutex.Lock()
stats.ValuesAlive += delta
statsMutex.Unlock()
}
}
func (stats *Statistics) connectionsAlive(delta int) {
if stats != nil {
statsMutex.Lock()
stats.ConnectionsAlive += delta
statsMutex.Unlock()
}
}
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