Files
node/cache/lru/deduplicator.go
zeekay 7cf87b230b node-unified is the node
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.
2026-09-07 16:15:25 -07:00

83 lines
1.9 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"
)
// Evictable allows the object to be notified when it is evicted
//
// Deprecated: Remove this once the vertex state no longer uses it.
type Evictable[K comparable] interface {
Key() K
Evict()
}
// Deduplicator is an LRU cache that notifies the objects when they are evicted.
//
// Deprecated: Remove this once the vertex state no longer uses it.
type Deduplicator[K comparable, V Evictable[K]] struct {
lock sync.Mutex
entryMap map[K]*linked.ListElement[V]
entryList *linked.List[V]
size int
}
// Deprecated: Remove this once the vertex state no longer uses it.
func NewDeduplicator[K comparable, V Evictable[K]](size int) *Deduplicator[K, V] {
return &Deduplicator[K, V]{
entryMap: make(map[K]*linked.ListElement[V]),
entryList: linked.NewList[V](),
size: max(size, 1),
}
}
// Deduplicate returns either the provided value, or a previously provided value
// with the same ID that hasn't yet been evicted
func (d *Deduplicator[_, V]) Deduplicate(value V) V {
d.lock.Lock()
defer d.lock.Unlock()
key := value.Key()
if e, ok := d.entryMap[key]; !ok {
if d.entryList.Len() >= d.size {
e = d.entryList.Front()
d.entryList.MoveToBack(e)
delete(d.entryMap, e.Value.Key())
e.Value.Evict()
e.Value = value
} else {
e = &linked.ListElement[V]{
Value: value,
}
d.entryList.PushBack(e)
}
d.entryMap[key] = e
} else {
d.entryList.MoveToBack(e)
value = e.Value
}
return value
}
// Flush removes all entries from the cache
func (d *Deduplicator[_, _]) Flush() {
d.lock.Lock()
defer d.lock.Unlock()
for d.entryList.Len() > 0 {
e := d.entryList.Front()
d.entryList.Remove(e)
delete(d.entryMap, e.Value.Key())
e.Value.Evict()
}
}