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agent.go
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agent.go
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// Copyright 2015 The UXGK Authors
// This file is part of the UXGK library.
//
// The UXGK 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 UXGK 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 UXGK library. If not, see <http://www.gnu.org/licenses/>.
package miner
import (
"github.com/yunhailanuxgk/go-uxgk/consensus/tribe"
"sync"
"sync/atomic"
"fmt"
"github.com/yunhailanuxgk/go-uxgk/consensus"
"github.com/yunhailanuxgk/go-uxgk/log"
)
type CpuAgent struct {
mu sync.Mutex
workCh chan *Work
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
}
func NewCpuAgent(chain consensus.ChainReader, engine consensus.Engine) *CpuAgent {
miner := &CpuAgent{
chain: chain,
engine: engine,
stop: make(chan struct{}, 1),
workCh: make(chan *Work, 1),
}
return miner
}
func (self *CpuAgent) Work() chan<- *Work { return self.workCh }
func (self *CpuAgent) SetReturnCh(ch chan<- *Result) { self.returnCh = ch }
func (self *CpuAgent) Stop() {
log.Info("call cpu agent stop")
if !atomic.CompareAndSwapInt32(&self.isMining, 1, 0) {
return // agent already stopped
}
//log.Info("call cpu agent stop2")
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 *Work, stop <-chan struct{}) {
result, err := self.engine.Seal(self.chain, work.Block, stop)
if result != nil {
ch := self.chain.CurrentHeader()
if result.Number().Cmp(ch.Number) > 0 {
log.Warn(fmt.Sprintf("😄 [%d] == done ==> num=%d, diff=%d, miner=%s", ch.Number, result.Number(), result.Header().Difficulty, result.Header().Coinbase.Hex()))
self.returnCh <- &Result{work, result}
} else {
log.Warn(fmt.Sprintf("👿 [%d] == discard ==> num=%d, diff=%d, miner=%s", ch.Number, result.Number(), result.Header().Difficulty, result.Header().Coinbase.Hex()))
self.returnCh <- nil
}
} else {
if err != nil && err != tribe.ErrTribeNotAllowEmptyTxList {
log.Debug("❌ Block sealing failed", "err", err)
}
self.returnCh <- nil
}
}
func (self *CpuAgent) GetHashRate() int64 {
if pow, ok := self.engine.(consensus.PoW); ok {
return int64(pow.Hashrate())
}
return 0
}