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properly unsubscribe react channels when miner stops - fixes write on closed chan crash

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This commit is contained in:
zelig 2014-07-15 01:12:45 +01:00
parent 1735ec0362
commit 017d36e6b2
1 changed files with 31 additions and 27 deletions
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52
ethminer/miner.go
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@ -25,30 +25,10 @@ type Miner struct {
}
func NewDefaultMiner(coinbase []byte, ethereum ethchain.EthManager) Miner {
reactChan := make(chan ethreact.Event, 1) // This is the channel that receives 'updates' when ever a new transaction or block comes in
powChan := make(chan []byte, 1) // This is the channel that receives valid sha hases for a given block
powQuitChan := make(chan ethreact.Event, 1) // This is the channel that can exit the miner thread
quitChan := make(chan bool, 1)
ethereum.Reactor().Subscribe("newBlock", reactChan)
ethereum.Reactor().Subscribe("newTx:pre", reactChan)
// We need the quit chan to be a Reactor event.
// The POW search method is actually blocking and if we don't
// listen to the reactor events inside of the pow itself
// The miner overseer will never get the reactor events themselves
// Only after the miner will find the sha
ethereum.Reactor().Subscribe("newBlock", powQuitChan)
ethereum.Reactor().Subscribe("newTx:pre", powQuitChan)
miner := Miner{
pow: &ethchain.EasyPow{},
ethereum: ethereum,
coinbase: coinbase,
reactChan: reactChan,
powChan: powChan,
powQuitChan: powQuitChan,
quitChan: quitChan,
}
// Insert initial TXs in our little miner 'pool'
@ -59,9 +39,27 @@ func NewDefaultMiner(coinbase []byte, ethereum ethchain.EthManager) Miner {
}
func (miner *Miner) Start() {
miner.reactChan = make(chan ethreact.Event, 1) // This is the channel that receives 'updates' when ever a new transaction or block comes in
miner.powChan = make(chan []byte, 1) // This is the channel that receives valid sha hashes for a given block
miner.powQuitChan = make(chan ethreact.Event, 1) // This is the channel that can exit the miner thread
miner.quitChan = make(chan bool, 1)
// Prepare inital block
//miner.ethereum.StateManager().Prepare(miner.block.State(), miner.block.State())
go miner.listener()
reactor := miner.ethereum.Reactor()
reactor.Subscribe("newBlock", miner.reactChan)
reactor.Subscribe("newTx:pre", miner.reactChan)
// We need the quit chan to be a Reactor event.
// The POW search method is actually blocking and if we don't
// listen to the reactor events inside of the pow itself
// The miner overseer will never get the reactor events themselves
// Only after the miner will find the sha
reactor.Subscribe("newBlock", miner.powQuitChan)
reactor.Subscribe("newTx:pre", miner.powQuitChan)
logger.Infoln("Started")
}
@ -127,12 +125,18 @@ out:
}
}
func (self *Miner) Stop() {
func (miner *Miner) Stop() {
logger.Infoln("Stopping...")
self.quitChan <- true
miner.quitChan <- true
close(self.powQuitChan)
close(self.quitChan)
reactor := miner.ethereum.Reactor()
reactor.Unsubscribe("newBlock", miner.powQuitChan)
reactor.Unsubscribe("newTx:pre", miner.powQuitChan)
reactor.Unsubscribe("newBlock", miner.reactChan)
reactor.Unsubscribe("newTx:pre", miner.reactChan)
close(miner.powQuitChan)
close(miner.quitChan)
}
func (self *Miner) mineNewBlock() {