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trie: rename TrieSync to Sync and improve hexToKeybytes (#16804)

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This removes a golint warning: type name will be used as trie.TrieSync by
other packages, and that stutters; consider calling this Sync.

In hexToKeybytes len(hex) is even and (even+1)/2 == even/2, remove the +1.
This commit is contained in:
Wenbiao Zheng
2018-05-29 23:48:43 +08:00
committed by Felix Lange
parent d51faee240
commit 38c7eb0f26
5 changed files with 37 additions and 37 deletions
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28
trie/sync.go
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@ -68,19 +68,19 @@ func newSyncMemBatch() *syncMemBatch {
}
}
// TrieSync is the main state trie synchronisation scheduler, which provides yet
// Sync is the main state trie synchronisation scheduler, which provides yet
// unknown trie hashes to retrieve, accepts node data associated with said hashes
// and reconstructs the trie step by step until all is done.
type TrieSync struct {
type Sync struct {
database DatabaseReader // Persistent database to check for existing entries
membatch *syncMemBatch // Memory buffer to avoid frequest database writes
requests map[common.Hash]*request // Pending requests pertaining to a key hash
queue *prque.Prque // Priority queue with the pending requests
}
// NewTrieSync creates a new trie data download scheduler.
func NewTrieSync(root common.Hash, database DatabaseReader, callback LeafCallback) *TrieSync {
ts := &TrieSync{
// NewSync creates a new trie data download scheduler.
func NewSync(root common.Hash, database DatabaseReader, callback LeafCallback) *Sync {
ts := &Sync{
database: database,
membatch: newSyncMemBatch(),
requests: make(map[common.Hash]*request),
@ -91,7 +91,7 @@ func NewTrieSync(root common.Hash, database DatabaseReader, callback LeafCallbac
}
// AddSubTrie registers a new trie to the sync code, rooted at the designated parent.
func (s *TrieSync) AddSubTrie(root common.Hash, depth int, parent common.Hash, callback LeafCallback) {
func (s *Sync) AddSubTrie(root common.Hash, depth int, parent common.Hash, callback LeafCallback) {
// Short circuit if the trie is empty or already known
if root == emptyRoot {
return
@ -126,7 +126,7 @@ func (s *TrieSync) AddSubTrie(root common.Hash, depth int, parent common.Hash, c
// interpreted as a trie node, but rather accepted and stored into the database
// as is. This method's goal is to support misc state metadata retrievals (e.g.
// contract code).
func (s *TrieSync) AddRawEntry(hash common.Hash, depth int, parent common.Hash) {
func (s *Sync) AddRawEntry(hash common.Hash, depth int, parent common.Hash) {
// Short circuit if the entry is empty or already known
if hash == emptyState {
return
@ -156,7 +156,7 @@ func (s *TrieSync) AddRawEntry(hash common.Hash, depth int, parent common.Hash)
}
// Missing retrieves the known missing nodes from the trie for retrieval.
func (s *TrieSync) Missing(max int) []common.Hash {
func (s *Sync) Missing(max int) []common.Hash {
requests := []common.Hash{}
for !s.queue.Empty() && (max == 0 || len(requests) < max) {
requests = append(requests, s.queue.PopItem().(common.Hash))
@ -167,7 +167,7 @@ func (s *TrieSync) Missing(max int) []common.Hash {
// Process injects a batch of retrieved trie nodes data, returning if something
// was committed to the database and also the index of an entry if processing of
// it failed.
func (s *TrieSync) Process(results []SyncResult) (bool, int, error) {
func (s *Sync) Process(results []SyncResult) (bool, int, error) {
committed := false
for i, item := range results {
@ -213,7 +213,7 @@ func (s *TrieSync) Process(results []SyncResult) (bool, int, error) {
// Commit flushes the data stored in the internal membatch out to persistent
// storage, returning the number of items written and any occurred error.
func (s *TrieSync) Commit(dbw ethdb.Putter) (int, error) {
func (s *Sync) Commit(dbw ethdb.Putter) (int, error) {
// Dump the membatch into a database dbw
for i, key := range s.membatch.order {
if err := dbw.Put(key[:], s.membatch.batch[key]); err != nil {
@ -228,14 +228,14 @@ func (s *TrieSync) Commit(dbw ethdb.Putter) (int, error) {
}
// Pending returns the number of state entries currently pending for download.
func (s *TrieSync) Pending() int {
func (s *Sync) Pending() int {
return len(s.requests)
}
// schedule inserts a new state retrieval request into the fetch queue. If there
// is already a pending request for this node, the new request will be discarded
// and only a parent reference added to the old one.
func (s *TrieSync) schedule(req *request) {
func (s *Sync) schedule(req *request) {
// If we're already requesting this node, add a new reference and stop
if old, ok := s.requests[req.hash]; ok {
old.parents = append(old.parents, req.parents...)
@ -248,7 +248,7 @@ func (s *TrieSync) schedule(req *request) {
// children retrieves all the missing children of a state trie entry for future
// retrieval scheduling.
func (s *TrieSync) children(req *request, object node) ([]*request, error) {
func (s *Sync) children(req *request, object node) ([]*request, error) {
// Gather all the children of the node, irrelevant whether known or not
type child struct {
node node
@ -310,7 +310,7 @@ func (s *TrieSync) children(req *request, object node) ([]*request, error) {
// commit finalizes a retrieval request and stores it into the membatch. If any
// of the referencing parent requests complete due to this commit, they are also
// committed themselves.
func (s *TrieSync) commit(req *request) (err error) {
func (s *Sync) commit(req *request) (err error) {
// Write the node content to the membatch
s.membatch.batch[req.hash] = req.data
s.membatch.order = append(s.membatch.order, req.hash)