mirror of
https://github.com/luxfi/node.git
synced 2026-10-30 15:24:05 +00:00
zeekay
7cf87b230b
The module already called itself github.com/luxfi/node while containing no node in Go: cmd/luxd was twenty-one lines that printed the size of a few types, and the Go column of the matrix measured a VM plugin. A repo that fetches the thing it claims to be has not replaced it, so the Go sources move in — 1515 files, the daemon and everything under it — and the build reaches outside this module for nothing. Rust and C++ sit beside it unchanged and are still measured against it by the differential. That is the point of one repo: the reference implementation and the two ports are the same checkout, so parity is a thing you can run rather than a thing you assert. Verified: builds, and the closure carries no lux-private — checked at build time rather than believed. The daemon starts twelve chains on a local network (P X C Q Z A B G K M F, plus D through its plugin) and reports healthy.
141 lines
3.0 KiB
Go
141 lines
3.0 KiB
Go
// Copyright (C) 2019-2025, Lux Industries Inc. All rights reserved.
|
|
// See the file LICENSE for licensing terms.
|
|
|
|
package lru
|
|
|
|
import (
|
|
"sync"
|
|
|
|
"github.com/luxfi/container/linked"
|
|
"github.com/luxfi/node/cache"
|
|
"github.com/luxfi/util"
|
|
)
|
|
|
|
var _ cache.Cacher[struct{}, any] = (*SizedCache[struct{}, any])(nil)
|
|
|
|
// sizedElement is used to store the element with its size, so we don't
|
|
// calculate the size multiple times.
|
|
//
|
|
// This ensures that any inconsistencies returned by the size function can not
|
|
// corrupt the cache.
|
|
type sizedElement[V any] struct {
|
|
value V
|
|
size int
|
|
}
|
|
|
|
// SizedCache is a key value store with bounded size. If the size is attempted
|
|
// to be exceeded, then elements are removed from the cache until the bound is
|
|
// honored, based on evicting the least recently used value.
|
|
type SizedCache[K comparable, V any] struct {
|
|
lock sync.Mutex
|
|
elements *linked.Hashmap[K, *sizedElement[V]]
|
|
maxSize int
|
|
currentSize int
|
|
size func(K, V) int
|
|
}
|
|
|
|
func NewSizedCache[K comparable, V any](maxSize int, size func(K, V) int) *SizedCache[K, V] {
|
|
return &SizedCache[K, V]{
|
|
elements: linked.NewHashmap[K, *sizedElement[V]](),
|
|
maxSize: maxSize,
|
|
size: size,
|
|
}
|
|
}
|
|
|
|
func (c *SizedCache[K, V]) Put(key K, value V) {
|
|
c.lock.Lock()
|
|
defer c.lock.Unlock()
|
|
|
|
c.put(key, value)
|
|
}
|
|
|
|
func (c *SizedCache[K, V]) Get(key K) (V, bool) {
|
|
c.lock.Lock()
|
|
defer c.lock.Unlock()
|
|
|
|
return c.get(key)
|
|
}
|
|
|
|
func (c *SizedCache[K, V]) Evict(key K) {
|
|
c.lock.Lock()
|
|
defer c.lock.Unlock()
|
|
|
|
c.evict(key)
|
|
}
|
|
|
|
func (c *SizedCache[K, V]) Flush() {
|
|
c.lock.Lock()
|
|
defer c.lock.Unlock()
|
|
|
|
c.flush()
|
|
}
|
|
|
|
func (c *SizedCache[_, _]) Len() int {
|
|
c.lock.Lock()
|
|
defer c.lock.Unlock()
|
|
|
|
return c.len()
|
|
}
|
|
|
|
func (c *SizedCache[_, _]) PortionFilled() float64 {
|
|
c.lock.Lock()
|
|
defer c.lock.Unlock()
|
|
|
|
return c.portionFilled()
|
|
}
|
|
|
|
func (c *SizedCache[K, V]) put(key K, value V) {
|
|
newEntrySize := c.size(key, value)
|
|
if newEntrySize > c.maxSize {
|
|
c.flush()
|
|
return
|
|
}
|
|
|
|
if oldElement, ok := c.elements.Get(key); ok {
|
|
c.currentSize -= oldElement.size
|
|
}
|
|
|
|
// Remove elements until the size of elements in the cache <= [c.maxSize].
|
|
for c.currentSize > c.maxSize-newEntrySize {
|
|
oldestKey, oldestElement, _ := c.elements.Oldest()
|
|
c.elements.Delete(oldestKey)
|
|
c.currentSize -= oldestElement.size
|
|
}
|
|
|
|
c.elements.Put(key, &sizedElement[V]{
|
|
value: value,
|
|
size: newEntrySize,
|
|
})
|
|
c.currentSize += newEntrySize
|
|
}
|
|
|
|
func (c *SizedCache[K, V]) get(key K) (V, bool) {
|
|
element, ok := c.elements.Get(key)
|
|
if !ok {
|
|
return utils.Zero[V](), false
|
|
}
|
|
|
|
c.elements.Put(key, element) // Mark [k] as MRU.
|
|
return element.value, true
|
|
}
|
|
|
|
func (c *SizedCache[K, _]) evict(key K) {
|
|
if element, ok := c.elements.Get(key); ok {
|
|
c.elements.Delete(key)
|
|
c.currentSize -= element.size
|
|
}
|
|
}
|
|
|
|
func (c *SizedCache[K, V]) flush() {
|
|
c.elements.Clear()
|
|
c.currentSize = 0
|
|
}
|
|
|
|
func (c *SizedCache[_, _]) len() int {
|
|
return c.elements.Len()
|
|
}
|
|
|
|
func (c *SizedCache[_, _]) portionFilled() float64 {
|
|
return float64(c.currentSize) / float64(c.maxSize)
|
|
}
|