From a1783d169732dd34aa8c7d68f411ce741c1a5015 Mon Sep 17 00:00:00 2001
From: gary rong <garyrong0905@gmail.com>
Date: Tue, 14 Aug 2018 23:34:33 +0800
Subject: miner: move agent logic to worker (#17351)

* miner: move agent logic to worker

* miner: polish

* core: persist block before reorg
---
 miner/agent.go | 116 ---------------------------------------------------------
 1 file changed, 116 deletions(-)
 delete mode 100644 miner/agent.go

(limited to 'miner/agent.go')

diff --git a/miner/agent.go b/miner/agent.go
deleted file mode 100644
index e922ea153..000000000
--- a/miner/agent.go
+++ /dev/null
@@ -1,116 +0,0 @@
-// 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/>.
-
-package miner
-
-import (
-	"sync"
-	"sync/atomic"
-
-	"github.com/ethereum/go-ethereum/consensus"
-	"github.com/ethereum/go-ethereum/log"
-)
-
-type CpuAgent struct {
-	mu sync.Mutex
-
-	taskCh        chan *Package
-	returnCh      chan<- *Package
-	stop          chan struct{}
-	quitCurrentOp chan struct{}
-
-	chain  consensus.ChainReader
-	engine consensus.Engine
-
-	started int32 // started indicates whether the agent is currently started
-}
-
-func NewCpuAgent(chain consensus.ChainReader, engine consensus.Engine) *CpuAgent {
-	agent := &CpuAgent{
-		chain:  chain,
-		engine: engine,
-		stop:   make(chan struct{}, 1),
-		taskCh: make(chan *Package, 1),
-	}
-	return agent
-}
-
-func (self *CpuAgent) AssignTask(p *Package) {
-	if atomic.LoadInt32(&self.started) == 1 {
-		self.taskCh <- p
-	}
-}
-func (self *CpuAgent) DeliverTo(ch chan<- *Package) { self.returnCh = ch }
-
-func (self *CpuAgent) Start() {
-	if !atomic.CompareAndSwapInt32(&self.started, 0, 1) {
-		return // agent already started
-	}
-	go self.update()
-}
-
-func (self *CpuAgent) Stop() {
-	if !atomic.CompareAndSwapInt32(&self.started, 1, 0) {
-		return // agent already stopped
-	}
-	self.stop <- struct{}{}
-done:
-	// Empty work channel
-	for {
-		select {
-		case <-self.taskCh:
-		default:
-			break done
-		}
-	}
-}
-
-func (self *CpuAgent) update() {
-out:
-	for {
-		select {
-		case p := <-self.taskCh:
-			self.mu.Lock()
-			if self.quitCurrentOp != nil {
-				close(self.quitCurrentOp)
-			}
-			self.quitCurrentOp = make(chan struct{})
-			go self.mine(p, 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(p *Package, stop <-chan struct{}) {
-	var err error
-	if p.Block, err = self.engine.Seal(self.chain, p.Block, stop); p.Block != nil {
-		log.Info("Successfully sealed new block", "number", p.Block.Number(), "hash", p.Block.Hash())
-		self.returnCh <- p
-	} else {
-		if err != nil {
-			log.Warn("Block sealing failed", "err", err)
-		}
-		self.returnCh <- nil
-	}
-}
-- 
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