Various threading fixes.

CMakeLists.txt

@@ -244,6 +244,15 @@ elseif (BUNDLE STREQUAL "full")
 	set(TOOLS ON)
 	set(TESTS ON)
 	set(FATDB ON)
+elseif (BUNDLE STREQUAL "core")
+	set(SERPENT OFF)
+	set(SOLIDITY ON)
+	set(USENPM OFF)
+	set(GUI ON)
+	set(NCURSES OFF)
+	set(TOOLS ON)
+	set(TESTS OFF)
+	set(FATDB ON)
 elseif (BUNDLE STREQUAL "tests")
 	set(SERPENT ${DECENT_PLATFORM})
 	set(SOLIDITY ON)

alethzero/CMakeLists.txt

@@ -59,7 +59,7 @@ target_link_libraries(${EXECUTABLE} jsqrc)
 target_link_libraries(${EXECUTABLE} natspec)
 target_link_libraries(${EXECUTABLE} ${MHD_LIBRARIES})
 
-if (NOT ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC"))
+if (SERPENT)
 	target_link_libraries(${EXECUTABLE} serpent)
 endif()
 

alethzero/Transact.cpp

@@ -37,7 +37,7 @@
 #include <libnatspec/NatspecExpressionEvaluator.h>
 #include <libethereum/Client.h>
 #include <libethereum/Utility.h>
-#ifndef _MSC_VER
+#if ETH_SERPENT
 #include <libserpent/funcs.h>
 #include <libserpent/util.h>
 #endif
@@ -220,7 +220,7 @@ static tuple<vector<string>, bytes, string> userInputToCode(string const& _user,
 			errors.push_back("Solidity: Uncaught exception");
 		}
 	}
-#ifndef _MSC_VER
+#if ETH_SERPENT
 	else if (sourceIsSerpent(_user))
 	{
 		try

exp/main.cpp

@@ -40,6 +40,7 @@
 #include <libethereum/Farm.h>
 #include <libethereum/AccountDiff.h>
 #include <libethereum/DownloadMan.h>
+#include <libethereum/Client.h>
 #include <liblll/All.h>
 #include <libwhisper/WhisperPeer.h>
 #include <libwhisper/WhisperHost.h>
@@ -153,7 +154,7 @@ int main()
 
 	return 0;
 }
-#else
+#elif 0
 
 void mine(State& s, BlockChain const& _bc)
 {
@@ -169,7 +170,7 @@ void mine(State& s, BlockChain const& _bc)
 	while (!completed)
 		this_thread::sleep_for(chrono::milliseconds(20));
 }
-
+#elif 0
 int main()
 {
 	cnote << "Testing State...";
@@ -224,5 +225,28 @@ int main()
 
 	return 0;
 }
+#else
+int main()
+{
+	string tempDir = boost::filesystem::temp_directory_path().string() + "/" + toString(chrono::system_clock::now().time_since_epoch().count());
+
+	KeyPair myMiner = sha3("Gav's Miner");
+
+	p2p::Host net("Test");
+	cdebug << "Path:" << tempDir;
+	Client c(&net, tempDir);
+
+	c.setAddress(myMiner.address());
+
+	this_thread::sleep_for(chrono::milliseconds(1000));
+
+	c.startMining();
+
+	this_thread::sleep_for(chrono::milliseconds(6000));
+
+	c.stopMining();
+
+	return 0;
+}
 #endif
 

libdevcore/Worker.cpp

@@ -29,7 +29,7 @@ using namespace dev;
 
 void Worker::startWorking(IfRunning _ir)
 {
-	cnote << "startWorking for thread" << m_name;
+//	cnote << "startWorking for thread" << m_name;
 	Guard l(x_work);
 
 	if (m_work && m_work->joinable())
@@ -56,7 +56,7 @@ void Worker::startWorking(IfRunning _ir)
 
 void Worker::stopWorking()
 {
-	cnote << "stopWorking for thread" << m_name;
+//	cnote << "stopWorking for thread" << m_name;
 	Guard l(x_work);
 	if (!m_work || !m_work->joinable())
 		return;

libethcore/Miner.h

@@ -73,11 +73,12 @@ public:
 	 * @param _finder The miner that found it.
 	 * @return true iff the solution was good (implying that mining should be .
 	 */
-	virtual bool submitProof(Solution const& _p, WorkPackage& io_wp, Miner* _finder) = 0;
+	virtual bool submitProof(Solution const& _p, Miner* _finder) = 0;
 };
 
 /**
  * @brief A miner - a member and adoptee of the Farm.
+ * @warning Not threadsafe. It is assumed Farm will synchronise calls to/from this class.
  */
 template <class PoW> class GenericMiner
 {
@@ -96,15 +97,17 @@ public:
 
 	void setWork(WorkPackage const& _work = WorkPackage())
 	{
-		Guard l(x_work);
 		auto old = m_work;
-		m_work = _work;
+		{
-		if (!!m_work)
+			Guard l(x_work);
+			m_work = _work;
+		}
+		if (!!_work)
 		{
 			pause();
 			kickOff();
 		}
-		else if (!m_work && !!old)
+		else if (!_work && !!old)
 			pause();
 		m_hashCount = 0;
 	}
@@ -137,16 +140,18 @@ protected:
 	 */
 	bool submitProof(Solution const& _s)
 	{
-		if (m_farm)
+		if (!m_farm)
+			return true;
+		if (m_farm->submitProof(_s, this))
 		{
-			if (!m_farm->submitProof(_s, m_work, this))
+			Guard l(x_work);
-				return false;
+			m_work.reset();
 			return true;
 		}
-		return true;
+		return false;
 	}
 
-	WorkPackage const& work() const { return m_work; }
+	WorkPackage const& work() const { Guard l(x_work); return m_work; }
 
 	void accumulateHashes(unsigned _n) { m_hashCount += _n; }
 
@@ -154,10 +159,10 @@ private:
 	FarmFace* m_farm = nullptr;
 	unsigned m_index;
 
-	Mutex x_work;
-	WorkPackage m_work;
-
 	uint64_t m_hashCount = 0;
+
+	WorkPackage m_work;
+	mutable Mutex x_work;
 };
 
 }

libethereum/Client.cpp

@@ -192,6 +192,27 @@ bool Client::isSyncing() const
 	return false;
 }
 
+void Client::startedWorking()
+{
+	// Synchronise the state according to the head of the block chain.
+	// TODO: currently it contains keys for *all* blocks. Make it remove old ones.
+	cdebug << "startedWorking()";
+	WriteGuard l(x_stateDB);
+
+	cdebug << m_bc.number() << m_bc.currentHash();
+
+	cdebug << "Pre:" << m_preMine.info();
+	cdebug << "Post:" << m_postMine.info();
+	cdebug << "Pre:" << m_preMine.info().headerHash(WithoutNonce) << "; Post:" << m_postMine.info().headerHash(WithoutNonce);
+
+	m_preMine.sync(m_bc);
+	m_postMine = m_preMine;
+
+	cdebug << "Pre:" << m_preMine.info();
+	cdebug << "Post:" << m_postMine.info();
+	cdebug << "Pre:" << m_preMine.info().headerHash(WithoutNonce) << "; Post:" << m_postMine.info().headerHash(WithoutNonce);
+}
+
 void Client::doneWorking()
 {
 	// Synchronise the state according to the head of the block chain.
@@ -403,10 +424,11 @@ bool Client::submitWork(ProofOfWork::Solution const& _solution)
 			return false;
 		newBlock = m_postMine.blockData();
 	}
-
+	m_bq.import(&newBlock, m_bc);
+/*
 	ImportRoute ir = m_bc.attemptImport(newBlock, m_stateDB);
 	if (!ir.first.empty())
-		onChainChanged(ir);
+		onChainChanged(ir);*/
 	return true;
 }
 
@@ -500,9 +522,9 @@ void Client::onChainChanged(ImportRoute const& _ir)
 			m_postMine = m_preMine;
 			changeds.insert(PendingChangedFilter);
 
-			x_stateDB.unlock();
+			x_stateDB.unlock_shared();
 			onPostStateChanged();
-			x_stateDB.lock();
+			x_stateDB.lock_shared();
 		}
 	}
 
@@ -514,8 +536,12 @@ void Client::onPostStateChanged()
 	cnote << "Post state changed: Restarting mining...";
 	{
 		WriteGuard l(x_stateDB);
+		cdebug << "Pre:" << m_preMine.info();
 		m_postMine.commitToMine(m_bc);
 		m_miningInfo = m_postMine.info();
+		cdebug << "Pre:" << m_preMine.info();
+		cdebug << "Post:" << m_postMine.info();
+		cdebug << "Pre:" << m_preMine.info().headerHash(WithoutNonce) << "; Post:" << m_postMine.info().headerHash(WithoutNonce);
 	}
 
 	m_farm.setWork(m_miningInfo);

libethereum/Client.h

@@ -169,7 +169,7 @@ public:
 
 	/// Start mining.
 	/// NOT thread-safe - call it & stopMining only from a single thread
-	void startMining() override { if (m_turboMining) m_farm.startGPU(); else m_farm.startCPU(); }
+	void startMining() override { if (m_turboMining) m_farm.startGPU(); else m_farm.startCPU(); onPostStateChanged(); }
 	/// Stop mining.
 	/// NOT thread-safe
 	void stopMining() override { m_farm.stop(); }
@@ -229,11 +229,14 @@ protected:
 	void noteChanged(h256Set const& _filters);
 
 private:
+	/// Called when Worker is starting.
+	void startedWorking() override;
+
 	/// Do some work. Handles blockchain maintenance and mining.
-	virtual void doWork();
+	void doWork() override;
 
 	/// Called when Worker is exiting.
-	virtual void doneWorking();
+	void doneWorking() override;
 
 	/// Magically called when the chain has changed. An import route is provided.
 	/// Called by either submitWork() or in our main thread through syncBlockQueue().

libethereum/Farm.h

@@ -61,8 +61,7 @@ public:
 	 */
 	void setWork(BlockInfo const& _bi)
 	{
-		WriteGuard l(x_work);
+		WriteGuard l(x_minerWork);
-		ReadGuard l2(x_miners);
 		m_header = _bi;
 		auto p = PoW::package(m_header);
 		if (p.headerHash == m_work.headerHash)
@@ -90,14 +89,14 @@ public:
 	 */
 	void stop()
 	{
-		WriteGuard l(x_miners);
+		WriteGuard l(x_minerWork);
 		m_miners.clear();
+		m_work.reset();
 	}
 
 	bool isMining() const
 	{
-		ReadGuard l(x_miners);
+		return !!m_work;
-		return !m_miners.empty();
 	}
 
 	/**
@@ -109,7 +108,7 @@ public:
 		MiningProgress p;
 		p.ms = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::steady_clock::now() - m_lastStart).count();
 		{
-			ReadGuard l2(x_miners);
+			ReadGuard l2(x_minerWork);
 			for (auto const& i: m_miners)
 				p.hashes += i->hashCount();
 		}
@@ -127,7 +126,7 @@ public:
 	 */
 	void onSolutionFound(SolutionFound const& _handler) { m_onSolutionFound = _handler; }
 
-	WorkPackage work() const { ReadGuard l(x_work); return m_work; }
+	WorkPackage work() const { ReadGuard l(x_minerWork); return m_work; }
 
 private:
 	/**
@@ -136,19 +135,14 @@ private:
 	 * @param _wp The WorkPackage that the Solution is for.
 	 * @return true iff the solution was good (implying that mining should be .
 	 */
-	bool submitProof(Solution const& _s, WorkPackage& _wp, Miner* _m) override
+	bool submitProof(Solution const& _s, Miner* _m) override
 	{
-		ReadGuard l(x_work);
-		if (_wp.headerHash != m_work.headerHash)
-			return false;
-
 		if (m_onSolutionFound && m_onSolutionFound(_s))
 		{
-			ReadGuard l(x_miners);
+			WriteGuard ul(x_minerWork);
 			for (std::shared_ptr<Miner> const& m: m_miners)
 				if (m.get() != _m)
 					m->setWork();
-			_wp.reset();
 			m_work.reset();
 			return true;
 		}
@@ -161,8 +155,7 @@ private:
 	template <class MinerType>
 	bool start()
 	{
-		ReadGuard l(x_work);
+		WriteGuard l(x_minerWork);
-		WriteGuard l2(x_miners);
 		if (!m_miners.empty() && !!std::dynamic_pointer_cast<MinerType>(m_miners[0]))
 			return true;
 		m_miners.clear();
@@ -181,17 +174,15 @@ private:
 		m_lastStart = std::chrono::steady_clock::now();
 	}
 
-	mutable SharedMutex x_miners;
+	mutable SharedMutex x_minerWork;
 	std::vector<std::shared_ptr<Miner>> m_miners;
+	WorkPackage m_work;
+	BlockInfo m_header;
 
 	mutable SharedMutex x_progress;
 	mutable MiningProgress m_progress;
 	std::chrono::steady_clock::time_point m_lastStart;
 
-	mutable SharedMutex x_work;
-	WorkPackage m_work;
-	BlockInfo m_header;
-
 	SolutionFound m_onSolutionFound;
 };