Refactored much EthashAux., especially the DAG generation callback stuff.

Made m_epochs active again.

libethcore/EthashAux.cpp

@@ -41,6 +41,8 @@ using namespace chrono;
 using namespace dev;
 using namespace eth;
 
+const char* DAGChannel::name() { return EthGreen "DAG"; }
+
 EthashAux* dev::eth::EthashAux::s_this = nullptr;
 
 EthashAux::~EthashAux()
@@ -76,9 +78,30 @@ h256 EthashAux::seedHash(unsigned _number)
 	return get()->m_seedHashes[epoch];
 }
 
+uint64_t EthashAux::number(h256 const& _seedHash)
+{
+	Guard l(get()->x_epochs);
+	unsigned epoch = 0;
+	auto epochIter = get()->m_epochs.find(_seedHash);
+	if (epochIter == get()->m_epochs.end())
+	{
+		//		cdebug << "Searching for seedHash " << _seedHash;
+		for (h256 h; h != _seedHash && epoch < 2048; ++epoch, h = sha3(h), get()->m_epochs[h] = epoch) {}
+		if (epoch == 2048)
+		{
+			std::ostringstream error;
+			error << "apparent block number for " << _seedHash << " is too high; max is " << (ETHASH_EPOCH_LENGTH * 2048);
+			throw std::invalid_argument(error.str());
+		}
+	}
+	else
+		epoch = epochIter->second;
+	return epoch * ETHASH_EPOCH_LENGTH;
+}
+
 void EthashAux::killCache(h256 const& _s)
 {
-	RecursiveGuard l(x_this);
+	RecursiveGuard l(x_lights);
 	m_lights.erase(_s);
 }
 
@@ -89,7 +112,7 @@ EthashAux::LightType EthashAux::light(BlockInfo const& _header)
 
 EthashAux::LightType EthashAux::light(uint64_t _blockNumber)
 {
-	RecursiveGuard l(get()->x_this);
+	RecursiveGuard l(get()->x_lights);
 	h256 seedHash = EthashAux::seedHash(_blockNumber);
 	LightType ret = get()->m_lights[seedHash];
 	return ret ? ret : (get()->m_lights[seedHash] = make_shared<LightAllocation>(_blockNumber));
@@ -126,30 +149,32 @@ bytesConstRef EthashAux::FullAllocation::data() const
 	return bytesConstRef((byte const*)ethash_full_dag(full), size());
 }
 
-EthashAux::FullType EthashAux::full(BlockInfo const& _header)
+EthashAux::FullType EthashAux::full(BlockInfo const& _header, function<int(unsigned)> const& _f)
 {
-	return full((uint64_t) _header.number);
+	return full((uint64_t)_header.number, _f);
 }
 
-struct DAGChannel: public LogChannel { static const char* name(); static const int verbosity = 0; };
-const char* DAGChannel::name() { return EthGreen "DAG"; }
-static int ethash_callback(unsigned int _progress)
+static std::function<int(unsigned)> s_dagCallback;
+static int dagCallbackShim(unsigned _p)
 {
-    clog(DAGChannel) << "Generating DAG file. Progress: " << toString(_progress) << "%";
-    return 0;
+	clog(DAGChannel) << "Generating DAG file. Progress: " << toString(_p) << "%";
+	return s_dagCallback ? s_dagCallback(_p) : 0;
 }
 
-EthashAux::FullType EthashAux::full(uint64_t _blockNumber)
+EthashAux::FullType EthashAux::full(uint64_t _blockNumber, function<int(unsigned)> const& _f)
 {
-	RecursiveGuard l(get()->x_this);
+	auto l = light(_blockNumber);
 	h256 seedHash = EthashAux::seedHash(_blockNumber);
 	FullType ret;
+
+	Guard lock(get()->x_fulls);
 	if ((ret = get()->m_fulls[seedHash].lock()))
 	{
 		get()->m_lastUsedFull = ret;
 		return ret;
 	}
-	ret = get()->m_lastUsedFull = make_shared<FullAllocation>(light(_blockNumber)->light, ethash_callback);
+	s_dagCallback = _f;
+	ret = get()->m_lastUsedFull = make_shared<FullAllocation>(l->light, dagCallbackShim);
 	get()->m_fulls[seedHash] = ret;
 	return ret;
 }

libethcore/EthashAux.h

@@ -27,6 +27,7 @@ namespace dev
 namespace eth
 {
 
+struct DAGChannel: public LogChannel { static const char* name(); static const int verbosity = 1; };
 
 class EthashAux
 {
@@ -59,27 +60,29 @@ public:
 	using FullType = std::shared_ptr<FullAllocation>;
 
 	static h256 seedHash(unsigned _number);
+	static uint64_t number(h256 const& _seedHash);
 	static uint64_t cacheSize(BlockInfo const& _header);
 
 	static LightType light(BlockInfo const& _header);
 	static LightType light(uint64_t _blockNumber);
-	static FullType full(BlockInfo const& _header);
-	static FullType full(uint64_t _blockNumber);
+	static FullType full(BlockInfo const& _header, std::function<int(unsigned)> const& _f = std::function<int(unsigned)>());
+	static FullType full(uint64_t _blockNumber, std::function<int(unsigned)> const& _f = std::function<int(unsigned)>());
 
 	static Ethash::Result eval(BlockInfo const& _header) { return eval(_header, _header.nonce); }
 	static Ethash::Result eval(BlockInfo const& _header, Nonce const& _nonce);
 	static Ethash::Result eval(uint64_t _blockNumber, h256 const& _headerHash, Nonce const& _nonce);
 
-
 private:
 	EthashAux() {}
 
 	void killCache(h256 const& _s);
 
 	static EthashAux* s_this;
-	RecursiveMutex x_this;
 
+	RecursiveMutex x_lights;
 	std::unordered_map<h256, std::shared_ptr<LightAllocation>> m_lights;
+
+	Mutex x_fulls;
 	std::unordered_map<h256, std::weak_ptr<FullAllocation>> m_fulls;
 	FullType m_lastUsedFull;