plugeth/miner/agent.go

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