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116 lines
2.8 KiB
116 lines
2.8 KiB
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package miner
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import (
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"sync"
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"sync/atomic"
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"github.com/ethereum/go-ethereum/consensus"
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"github.com/ethereum/go-ethereum/log"
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)
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type CpuAgent struct {
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mu sync.Mutex
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taskCh chan *Package
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returnCh chan<- *Package
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stop chan struct{}
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quitCurrentOp chan struct{}
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chain consensus.ChainReader
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engine consensus.Engine
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started int32 // started indicates whether the agent is currently started
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}
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func NewCpuAgent(chain consensus.ChainReader, engine consensus.Engine) *CpuAgent {
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agent := &CpuAgent{
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chain: chain,
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engine: engine,
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stop: make(chan struct{}, 1),
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taskCh: make(chan *Package, 1),
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}
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return agent
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}
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func (self *CpuAgent) AssignTask(p *Package) {
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if atomic.LoadInt32(&self.started) == 1 {
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self.taskCh <- p
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}
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}
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func (self *CpuAgent) DeliverTo(ch chan<- *Package) { self.returnCh = ch }
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func (self *CpuAgent) Start() {
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if !atomic.CompareAndSwapInt32(&self.started, 0, 1) {
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return // agent already started
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}
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go self.update()
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}
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func (self *CpuAgent) Stop() {
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if !atomic.CompareAndSwapInt32(&self.started, 1, 0) {
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return // agent already stopped
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}
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self.stop <- struct{}{}
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done:
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// Empty work channel
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for {
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select {
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case <-self.taskCh:
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default:
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break done
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}
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}
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}
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func (self *CpuAgent) update() {
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out:
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for {
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select {
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case p := <-self.taskCh:
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self.mu.Lock()
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if self.quitCurrentOp != nil {
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close(self.quitCurrentOp)
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}
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self.quitCurrentOp = make(chan struct{})
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go self.mine(p, self.quitCurrentOp)
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self.mu.Unlock()
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case <-self.stop:
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self.mu.Lock()
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if self.quitCurrentOp != nil {
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close(self.quitCurrentOp)
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self.quitCurrentOp = nil
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}
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self.mu.Unlock()
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break out
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}
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}
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}
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func (self *CpuAgent) mine(p *Package, stop <-chan struct{}) {
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var err error
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if p.Block, err = self.engine.Seal(self.chain, p.Block, stop); p.Block != nil {
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log.Info("Successfully sealed new block", "number", p.Block.Number(), "hash", p.Block.Hash())
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self.returnCh <- p
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} else {
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if err != nil {
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log.Warn("Block sealing failed", "err", err)
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}
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self.returnCh <- nil
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}
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}
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