96 lines
3.0 KiB
Go
96 lines
3.0 KiB
Go
// Copyright 2022 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package triedb
|
|
|
|
import (
|
|
"sync"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/core/rawdb"
|
|
"github.com/ethereum/go-ethereum/ethdb"
|
|
)
|
|
|
|
// preimageStore is the store for caching preimages of node key.
|
|
type preimageStore struct {
|
|
lock sync.RWMutex
|
|
disk ethdb.KeyValueStore
|
|
preimages map[common.Hash][]byte // Preimages of nodes from the secure trie
|
|
preimagesSize common.StorageSize // Storage size of the preimages cache
|
|
}
|
|
|
|
// newPreimageStore initializes the store for caching preimages.
|
|
func newPreimageStore(disk ethdb.KeyValueStore) *preimageStore {
|
|
return &preimageStore{
|
|
disk: disk,
|
|
preimages: make(map[common.Hash][]byte),
|
|
}
|
|
}
|
|
|
|
// insertPreimage writes a new trie node pre-image to the memory database if it's
|
|
// yet unknown. The method will NOT make a copy of the slice, only use if the
|
|
// preimage will NOT be changed later on.
|
|
func (store *preimageStore) insertPreimage(preimages map[common.Hash][]byte) {
|
|
store.lock.Lock()
|
|
defer store.lock.Unlock()
|
|
|
|
for hash, preimage := range preimages {
|
|
if _, ok := store.preimages[hash]; ok {
|
|
continue
|
|
}
|
|
store.preimages[hash] = preimage
|
|
store.preimagesSize += common.StorageSize(common.HashLength + len(preimage))
|
|
}
|
|
}
|
|
|
|
// preimage retrieves a cached trie node pre-image from memory. If it cannot be
|
|
// found cached, the method queries the persistent database for the content.
|
|
func (store *preimageStore) preimage(hash common.Hash) []byte {
|
|
store.lock.RLock()
|
|
preimage := store.preimages[hash]
|
|
store.lock.RUnlock()
|
|
|
|
if preimage != nil {
|
|
return preimage
|
|
}
|
|
return rawdb.ReadPreimage(store.disk, hash)
|
|
}
|
|
|
|
// commit flushes the cached preimages into the disk.
|
|
func (store *preimageStore) commit(force bool) error {
|
|
store.lock.Lock()
|
|
defer store.lock.Unlock()
|
|
|
|
if store.preimagesSize <= 4*1024*1024 && !force {
|
|
return nil
|
|
}
|
|
batch := store.disk.NewBatch()
|
|
rawdb.WritePreimages(batch, store.preimages)
|
|
if err := batch.Write(); err != nil {
|
|
return err
|
|
}
|
|
store.preimages, store.preimagesSize = make(map[common.Hash][]byte), 0
|
|
return nil
|
|
}
|
|
|
|
// size returns the current storage size of accumulated preimages.
|
|
func (store *preimageStore) size() common.StorageSize {
|
|
store.lock.RLock()
|
|
defer store.lock.RUnlock()
|
|
|
|
return store.preimagesSize
|
|
}
|