/
agent.go
135 lines (118 loc) · 3.45 KB
/
agent.go
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// Modifications Copyright 2018 The klaytn Authors
// Copyright 2015 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/>.
//
// This file is derived from miner/agent.go (2018/06/04).
// Modified and improved for the klaytn development.
package work
import (
"sync"
"sync/atomic"
"github.com/klaytn/klaytn/common"
"github.com/klaytn/klaytn/consensus"
)
type CpuAgent struct {
mu sync.Mutex
workCh chan *Task
stop chan struct{}
quitCurrentOp chan struct{}
returnCh chan<- *Result
chain consensus.ChainReader
engine consensus.Engine
isMining int32 // isMining indicates whether the agent is currently mining
nodetype common.ConnType
}
func NewCpuAgent(chain consensus.ChainReader, engine consensus.Engine, nodetype common.ConnType) *CpuAgent {
miner := &CpuAgent{
chain: chain,
engine: engine,
stop: make(chan struct{}, 1),
workCh: make(chan *Task, 1),
nodetype: nodetype,
}
return miner
}
func (self *CpuAgent) Work() chan<- *Task { return self.workCh }
func (self *CpuAgent) SetReturnCh(ch chan<- *Result) { self.returnCh = ch }
func (self *CpuAgent) Stop() {
if !atomic.CompareAndSwapInt32(&self.isMining, 1, 0) {
return // agent already stopped
}
self.stop <- struct{}{}
done:
// Empty work channel
for {
select {
case <-self.workCh:
default:
break done
}
}
}
func (self *CpuAgent) Start() {
if !atomic.CompareAndSwapInt32(&self.isMining, 0, 1) {
return // agent already started
}
go self.update()
}
func (self *CpuAgent) update() {
out:
for {
select {
case work := <-self.workCh:
self.mu.Lock()
if self.quitCurrentOp != nil {
close(self.quitCurrentOp)
}
self.quitCurrentOp = make(chan struct{})
go self.mine(work, self.quitCurrentOp)
self.mu.Unlock()
case <-self.stop:
self.mu.Lock()
if self.quitCurrentOp != nil {
close(self.quitCurrentOp)
self.quitCurrentOp = nil
}
self.mu.Unlock()
break out
}
}
}
func (self *CpuAgent) mine(work *Task, stop <-chan struct{}) {
// TODO-Klaytn drop or missing tx and remove mining on PN and EN
if self.nodetype != common.CONSENSUSNODE {
ResultChGauge.Update(ResultChGauge.Value() + 1)
self.returnCh <- &Result{work, nil}
return
}
if result, err := self.engine.Seal(self.chain, work.Block, stop); result != nil {
logger.Info("Successfully sealed new block", "number", result.Number(), "hash", result.Hash())
ResultChGauge.Update(ResultChGauge.Value() + 1)
self.returnCh <- &Result{work, result}
} else {
if err != nil {
logger.Warn("Block sealing failed", "err", err)
}
ResultChGauge.Update(ResultChGauge.Value() + 1)
self.returnCh <- nil
}
}
func (self *CpuAgent) GetHashRate() int64 {
if pow, ok := self.engine.(consensus.PoW); ok {
return int64(pow.Hashrate())
}
return 0
}