53 lines
773 B
Go
53 lines
773 B
Go
|
package main
|
||
|
|
||
|
import (
|
||
|
"sync"
|
||
|
"time"
|
||
|
)
|
||
|
|
||
|
const (
|
||
|
CacheTotalKnownBlocksAndMiners = iota
|
||
|
totalSize
|
||
|
)
|
||
|
|
||
|
var cache = make([]*cachedResult, totalSize)
|
||
|
var cacheLock sync.RWMutex
|
||
|
|
||
|
type cachedResult struct {
|
||
|
t time.Time
|
||
|
result any
|
||
|
}
|
||
|
|
||
|
func cacheResult(k uint, cacheTime time.Duration, result func() any) any {
|
||
|
if k >= totalSize {
|
||
|
return result()
|
||
|
}
|
||
|
if r := func() any {
|
||
|
if cacheTime > 0 {
|
||
|
cacheLock.RLock()
|
||
|
defer cacheLock.RUnlock()
|
||
|
|
||
|
if r := cache[k]; r != nil && r.t.Add(cacheTime).After(time.Now()) {
|
||
|
return r.result
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return nil
|
||
|
}(); r != nil {
|
||
|
return r
|
||
|
}
|
||
|
|
||
|
r := result()
|
||
|
|
||
|
if cacheTime > 0 && r != nil {
|
||
|
cacheLock.Lock()
|
||
|
defer cacheLock.Unlock()
|
||
|
cache[k] = &cachedResult{
|
||
|
t: time.Now(),
|
||
|
result: r,
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return r
|
||
|
}
|