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package miner
import (
"sync"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
"github.com/ethereum/go-ethereum/pow"
)
type CpuAgent struct {
mu sync.Mutex
workCh chan *types.Block
quit chan struct{}
quitCurrentOp chan struct{}
returnCh chan<- *types.Block
index int
pow pow.PoW
}
func NewCpuAgent(index int, pow pow.PoW) *CpuAgent {
miner := &CpuAgent{
pow: pow,
index: index,
}
return miner
}
func (self *CpuAgent) Work() chan<- *types.Block { return self.workCh }
func (self *CpuAgent) Pow() pow.PoW { return self.pow }
func (self *CpuAgent) SetReturnCh(ch chan<- *types.Block) { self.returnCh = ch }
func (self *CpuAgent) Stop() {
self.mu.Lock()
defer self.mu.Unlock()
close(self.quit)
}
func (self *CpuAgent) Start() {
self.mu.Lock()
defer self.mu.Unlock()
self.quit = make(chan struct{})
// creating current op ch makes sure we're not closing a nil ch
// later on
self.workCh = make(chan *types.Block, 1)
go self.update()
}
func (self *CpuAgent) update() {
out:
for {
select {
case block := <-self.workCh:
self.mu.Lock()
if self.quitCurrentOp != nil {
close(self.quitCurrentOp)
}
self.quitCurrentOp = make(chan struct{})
go self.mine(block, self.quitCurrentOp)
self.mu.Unlock()
case <-self.quit:
self.mu.Lock()
if self.quitCurrentOp != nil {
close(self.quitCurrentOp)
self.quitCurrentOp = nil
}
self.mu.Unlock()
break out
}
}
done:
// Empty work channel
for {
select {
case <-self.workCh:
default:
close(self.workCh)
break done
}
}
}
func (self *CpuAgent) mine(block *types.Block, stop <- chan struct{}) {
glog.V(logger.Debug).Infof("(re)started agent[%d]. mining...\n", self.index)
// Mine
nonce, mixDigest := self.pow.Search(block, stop)
if nonce != 0 {
block.SetNonce(nonce)
block.Header().MixDigest = common.BytesToHash(mixDigest)
self.returnCh <- block
} else {
self.returnCh <- nil
}
}
func (self *CpuAgent) GetHashRate() int64 {
return self.pow.GetHashrate()
}
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