129 lines
2.4 KiB
Go
129 lines
2.4 KiB
Go
package eth
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import (
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"fmt"
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"math"
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"math/big"
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"sync"
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"github.com/ethereum/eth-go/ethchain"
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"github.com/ethereum/eth-go/ethutil"
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)
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type block struct {
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peer *Peer
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block *ethchain.Block
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}
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type BlockPool struct {
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mut sync.Mutex
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eth *Ethereum
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hashPool [][]byte
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pool map[string]*block
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td *big.Int
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}
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func NewBlockPool(eth *Ethereum) *BlockPool {
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return &BlockPool{
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eth: eth,
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pool: make(map[string]*block),
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td: ethutil.Big0,
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}
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}
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func (self *BlockPool) HasLatestHash() bool {
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return self.pool[string(self.eth.BlockChain().CurrentBlock.Hash())] != nil
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}
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func (self *BlockPool) HasCommonHash(hash []byte) bool {
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return self.eth.BlockChain().GetBlock(hash) != nil
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}
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func (self *BlockPool) AddHash(hash []byte) {
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if self.pool[string(hash)] == nil {
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self.pool[string(hash)] = &block{nil, nil}
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self.hashPool = append([][]byte{hash}, self.hashPool...)
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}
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}
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func (self *BlockPool) SetBlock(b *ethchain.Block, peer *Peer) {
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hash := string(b.Hash())
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fmt.Printf("::SetBlock %x\n", hash)
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if self.pool[hash] == nil {
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self.pool[hash] = &block{peer, nil}
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}
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self.pool[hash].block = b
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}
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func (self *BlockPool) CheckLinkAndProcess(f func(block *ethchain.Block)) bool {
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self.mut.Lock()
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defer self.mut.Unlock()
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if self.IsLinked() {
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for i, hash := range self.hashPool {
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if self.pool[string(hash)] == nil {
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continue
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}
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block := self.pool[string(hash)].block
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if block != nil {
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f(block)
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delete(self.pool, string(hash))
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} else {
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self.hashPool = self.hashPool[i:]
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return false
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}
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}
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return true
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}
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return false
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}
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func (self *BlockPool) IsLinked() bool {
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if len(self.hashPool) == 0 {
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return false
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}
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for i := 0; i < len(self.hashPool); i++ {
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item := self.pool[string(self.hashPool[i])]
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if item != nil && item.block != nil {
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if self.eth.BlockChain().HasBlock(item.block.PrevHash) {
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self.hashPool = self.hashPool[i:]
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return true
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}
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}
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}
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return false
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}
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func (self *BlockPool) Take(amount int, peer *Peer) (hashes [][]byte) {
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self.mut.Lock()
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defer self.mut.Unlock()
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num := int(math.Min(float64(amount), float64(len(self.pool))))
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j := 0
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for i := 0; i < len(self.hashPool) && j < num; i++ {
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hash := string(self.hashPool[i])
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if self.pool[hash] != nil && (self.pool[hash].peer == nil || self.pool[hash].peer == peer) && self.pool[hash].block == nil {
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self.pool[hash].peer = peer
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hashes = append(hashes, self.hashPool[i])
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j++
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}
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}
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return
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}
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