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https://github.com/luxfi/node.git
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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.
127 lines
2.6 KiB
Go
127 lines
2.6 KiB
Go
// Copyright (C) 2019-2025, Lux Industries Inc. All rights reserved.
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// See the file LICENSE for licensing terms.
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package cache
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import (
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"sync"
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"github.com/luxfi/container/linked"
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"github.com/luxfi/util"
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)
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var _ Cacher[struct{}, any] = (*sizedLRU[struct{}, any])(nil)
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// sizedLRU is a key value store with bounded size. If the size is attempted to
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// be exceeded, then elements are removed from the cache until the bound is
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// honored, based on evicting the least recently used value.
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type sizedLRU[K comparable, V any] struct {
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lock sync.Mutex
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elements *linked.Hashmap[K, V]
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maxSize int
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currentSize int
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size func(K, V) int
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}
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func NewSizedLRU[K comparable, V any](maxSize int, size func(K, V) int) Cacher[K, V] {
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return &sizedLRU[K, V]{
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elements: linked.NewHashmap[K, V](),
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maxSize: maxSize,
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size: size,
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}
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}
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func (c *sizedLRU[K, V]) Put(key K, value V) {
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c.lock.Lock()
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defer c.lock.Unlock()
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c.put(key, value)
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}
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func (c *sizedLRU[K, V]) Get(key K) (V, bool) {
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c.lock.Lock()
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defer c.lock.Unlock()
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return c.get(key)
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}
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func (c *sizedLRU[K, V]) Evict(key K) {
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c.lock.Lock()
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defer c.lock.Unlock()
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c.evict(key)
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}
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func (c *sizedLRU[K, V]) Flush() {
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c.lock.Lock()
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defer c.lock.Unlock()
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c.flush()
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}
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func (c *sizedLRU[_, _]) Len() int {
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c.lock.Lock()
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defer c.lock.Unlock()
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return c.len()
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}
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func (c *sizedLRU[_, _]) PortionFilled() float64 {
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c.lock.Lock()
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defer c.lock.Unlock()
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return c.portionFilled()
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}
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func (c *sizedLRU[K, V]) put(key K, value V) {
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newEntrySize := c.size(key, value)
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if newEntrySize > c.maxSize {
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c.flush()
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return
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}
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if oldValue, ok := c.elements.Get(key); ok {
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c.currentSize -= c.size(key, oldValue)
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}
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// Remove elements until the size of elements in the cache <= [c.maxSize].
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for c.currentSize > c.maxSize-newEntrySize {
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oldestKey, oldestValue, _ := c.elements.Oldest()
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c.elements.Delete(oldestKey)
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c.currentSize -= c.size(oldestKey, oldestValue)
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}
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c.elements.Put(key, value)
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c.currentSize += newEntrySize
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}
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func (c *sizedLRU[K, V]) get(key K) (V, bool) {
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value, ok := c.elements.Get(key)
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if !ok {
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return utils.Zero[V](), false
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}
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c.elements.Put(key, value) // Mark [k] as MRU.
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return value, true
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}
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func (c *sizedLRU[K, _]) evict(key K) {
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if value, ok := c.elements.Get(key); ok {
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c.elements.Delete(key)
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c.currentSize -= c.size(key, value)
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}
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}
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func (c *sizedLRU[K, V]) flush() {
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c.elements.Clear()
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c.currentSize = 0
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}
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func (c *sizedLRU[_, _]) len() int {
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return c.elements.Len()
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}
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func (c *sizedLRU[_, _]) portionFilled() float64 {
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return float64(c.currentSize) / float64(c.maxSize)
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}
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