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trie: dirty tracking

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This commit is contained in:
Jeffrey Wilcke
2015-07-01 15:38:32 +02:00
parent ab16ce70fc
commit 0a1ff68c11
7 changed files with 73 additions and 28 deletions
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15
trie/fullnode.go
View File

@@ -1,17 +1,16 @@
package trie
import "fmt"
type FullNode struct {
trie *Trie
nodes [17]Node
dirty bool
}
func NewFullNode(t *Trie) *FullNode {
return &FullNode{trie: t}
}
func (self *FullNode) Dirty() bool { return true }
func (self *FullNode) Dirty() bool { return self.dirty }
func (self *FullNode) Value() Node {
self.nodes[16] = self.trie.trans(self.nodes[16])
return self.nodes[16]
@@ -27,6 +26,7 @@ func (self *FullNode) Copy(t *Trie) Node {
nnode.nodes[i] = node.Copy(t)
}
}
nnode.dirty = true
return nnode
}
@@ -60,11 +60,8 @@ func (self *FullNode) RlpData() interface{} {
}
func (self *FullNode) set(k byte, value Node) {
if _, ok := value.(*ValueNode); ok && k != 16 {
fmt.Println(value, k)
}
self.nodes[int(k)] = value
self.dirty = true
}
func (self *FullNode) branch(i byte) Node {
@@ -75,3 +72,7 @@ func (self *FullNode) branch(i byte) Node {
}
return nil
}
func (self *FullNode) setDirty(dirty bool) {
self.dirty = dirty
}

7
trie/hashnode.go
View File

@@ -5,10 +5,11 @@ import "github.com/ethereum/go-ethereum/common"
type HashNode struct {
key []byte
trie *Trie
dirty bool
}
func NewHash(key []byte, trie *Trie) *HashNode {
return &HashNode{key, trie}
return &HashNode{key, trie, false}
}
func (self *HashNode) RlpData() interface{} {
@@ -19,6 +20,10 @@ func (self *HashNode) Hash() interface{} {
return self.key
}
func (self *HashNode) setDirty(dirty bool) {
self.dirty = dirty
}
// These methods will never be called but we have to satisfy Node interface
func (self *HashNode) Value() Node { return nil }
func (self *HashNode) Dirty() bool { return true }

1
trie/node.go
View File

@@ -11,6 +11,7 @@ type Node interface {
fstring(string) string
Hash() interface{}
RlpData() interface{}
setDirty(dirty bool)
}
// Value node

12
trie/shortnode.go
View File

@@ -6,20 +6,22 @@ type ShortNode struct {
trie *Trie
key []byte
value Node
dirty bool
}
func NewShortNode(t *Trie, key []byte, value Node) *ShortNode {
return &ShortNode{t, []byte(CompactEncode(key)), value}
return &ShortNode{t, []byte(CompactEncode(key)), value, false}
}
func (self *ShortNode) Value() Node {
self.value = self.trie.trans(self.value)
return self.value
}
func (self *ShortNode) Dirty() bool { return true }
func (self *ShortNode) Dirty() bool { return self.dirty }
func (self *ShortNode) Copy(t *Trie) Node {
node := &ShortNode{t, nil, self.value.Copy(t)}
node := &ShortNode{t, nil, self.value.Copy(t), self.dirty}
node.key = common.CopyBytes(self.key)
node.dirty = true
return node
}
@@ -33,3 +35,7 @@ func (self *ShortNode) Hash() interface{} {
func (self *ShortNode) Key() []byte {
return CompactDecode(string(self.key))
}
func (self *ShortNode) setDirty(dirty bool) {
self.dirty = dirty
}

35
trie/trie.go
View File

@@ -117,7 +117,9 @@ func (self *Trie) Update(key, value []byte) Node {
k := CompactHexDecode(string(key))
if len(value) != 0 {
self.root = self.insert(self.root, k, &ValueNode{self, value})
node := NewValueNode(self, value)
node.dirty = true
self.root = self.insert(self.root, k, node)
} else {
self.root = self.delete(self.root, k)
}
@@ -157,7 +159,9 @@ func (self *Trie) insert(node Node, key []byte, value Node) Node {
}
if node == nil {
return NewShortNode(self, key, value)
node := NewShortNode(self, key, value)
node.dirty = true
return node
}
switch node := node.(type) {
@@ -165,7 +169,10 @@ func (self *Trie) insert(node Node, key []byte, value Node) Node {
k := node.Key()
cnode := node.Value()
if bytes.Equal(k, key) {
return NewShortNode(self, key, value)
node := NewShortNode(self, key, value)
node.dirty = true
return node
}
var n Node
@@ -176,6 +183,7 @@ func (self *Trie) insert(node Node, key []byte, value Node) Node {
pnode := self.insert(nil, k[matchlength+1:], cnode)
nnode := self.insert(nil, key[matchlength+1:], value)
fulln := NewFullNode(self)
fulln.dirty = true
fulln.set(k[matchlength], pnode)
fulln.set(key[matchlength], nnode)
n = fulln
@@ -184,11 +192,14 @@ func (self *Trie) insert(node Node, key []byte, value Node) Node {
return n
}
return NewShortNode(self, key[:matchlength], n)
snode := NewShortNode(self, key[:matchlength], n)
snode.dirty = true
return snode
case *FullNode:
cpy := node.Copy(self).(*FullNode)
cpy.set(key[0], self.insert(node.branch(key[0]), key[1:], value))
cpy.dirty = true
return cpy
@@ -242,8 +253,10 @@ func (self *Trie) delete(node Node, key []byte) Node {
case *ShortNode:
nkey := append(k, child.Key()...)
n = NewShortNode(self, nkey, child.Value())
n.(*ShortNode).dirty = true
case *FullNode:
sn := NewShortNode(self, node.Key(), child)
sn.dirty = true
sn.key = node.key
n = sn
}
@@ -256,6 +269,7 @@ func (self *Trie) delete(node Node, key []byte) Node {
case *FullNode:
n := node.Copy(self).(*FullNode)
n.set(key[0], self.delete(n.branch(key[0]), key[1:]))
n.dirty = true
pos := -1
for i := 0; i < 17; i++ {
@@ -271,6 +285,7 @@ func (self *Trie) delete(node Node, key []byte) Node {
var nnode Node
if pos == 16 {
nnode = NewShortNode(self, []byte{16}, n.branch(byte(pos)))
nnode.(*ShortNode).dirty = true
} else if pos >= 0 {
cnode := n.branch(byte(pos))
switch cnode := cnode.(type) {
@@ -278,8 +293,10 @@ func (self *Trie) delete(node Node, key []byte) Node {
// Stitch keys
k := append([]byte{byte(pos)}, cnode.Key()...)
nnode = NewShortNode(self, k, cnode.Value())
nnode.(*ShortNode).dirty = true
case *FullNode:
nnode = NewShortNode(self, []byte{byte(pos)}, n.branch(byte(pos)))
nnode.(*ShortNode).dirty = true
}
} else {
nnode = n
@@ -304,7 +321,7 @@ func (self *Trie) mknode(value *common.Value) Node {
if value.Get(0).Len() != 0 {
key := CompactDecode(string(value.Get(0).Bytes()))
if key[len(key)-1] == 16 {
return NewShortNode(self, key, &ValueNode{self, value.Get(1).Bytes()})
return NewShortNode(self, key, NewValueNode(self, value.Get(1).Bytes()))
} else {
return NewShortNode(self, key, self.mknode(value.Get(1)))
}
@@ -318,10 +335,10 @@ func (self *Trie) mknode(value *common.Value) Node {
return fnode
}
case 32:
return &HashNode{value.Bytes(), self}
return NewHash(value.Bytes(), self)
}
return &ValueNode{self, value.Bytes()}
return NewValueNode(self, value.Bytes())
}
func (self *Trie) trans(node Node) Node {
@@ -338,7 +355,11 @@ func (self *Trie) store(node Node) interface{} {
data := common.Encode(node)
if len(data) >= 32 {
key := crypto.Sha3(data)
if node.Dirty() {
//fmt.Println("save", node)
//fmt.Println()
self.cache.Put(key, data)
}
return key
}

2
trie/trie_test.go
View File

@@ -152,7 +152,7 @@ func TestReplication(t *testing.T) {
}
trie.Commit()
trie2 := New(trie.roothash, trie.cache.backend)
trie2 := New(trie.Root(), trie.cache.backend)
if string(trie2.GetString("horse")) != "stallion" {
t.Error("expected to have horse => stallion")
}

15
trie/valuenode.go
View File

@@ -5,11 +5,22 @@ import "github.com/ethereum/go-ethereum/common"
type ValueNode struct {
trie *Trie
data []byte
dirty bool
}
func NewValueNode(trie *Trie, data []byte) *ValueNode {
return &ValueNode{trie, data, false}
}
func (self *ValueNode) Value() Node { return self } // Best not to call :-)
func (self *ValueNode) Val() []byte { return self.data }
func (self *ValueNode) Dirty() bool { return true }
func (self *ValueNode) Copy(t *Trie) Node { return &ValueNode{t, common.CopyBytes(self.data)} }
func (self *ValueNode) Dirty() bool { return self.dirty }
func (self *ValueNode) Copy(t *Trie) Node {
return &ValueNode{t, common.CopyBytes(self.data), self.dirty}
}
func (self *ValueNode) RlpData() interface{} { return self.data }
func (self *ValueNode) Hash() interface{} { return self.data }
func (self *ValueNode) setDirty(dirty bool) {
self.dirty = dirty
}