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Diffstat (limited to 'src/validationinterface.cpp')
| -rw-r--r-- | src/validationinterface.cpp | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/src/validationinterface.cpp b/src/validationinterface.cpp new file mode 100644 index 000000000..e25eca236 --- /dev/null +++ b/src/validationinterface.cpp @@ -0,0 +1,179 @@ +// Copyright (c) 2009-2010 Satoshi Nakamoto +// Copyright (c) 2009-2018 The Bitcoin Core developers +// Distributed under the MIT software license, see the accompanying +// file COPYING or http://www.opensource.org/licenses/mit-license.php. + +#include <validationinterface.h> + +#include <primitives/block.h> +#include <scheduler.h> +#include <txmempool.h> +#include <util.h> +#include <validation.h> + +#include <list> +#include <atomic> +#include <future> + +#include <boost/signals2/signal.hpp> + +struct MainSignalsInstance { + boost::signals2::signal<void (const CBlockIndex *, const CBlockIndex *, bool fInitialDownload)> UpdatedBlockTip; + boost::signals2::signal<void (const CTransactionRef &)> TransactionAddedToMempool; + boost::signals2::signal<void (const std::shared_ptr<const CBlock> &, const CBlockIndex *pindex, const std::vector<CTransactionRef>&)> BlockConnected; + boost::signals2::signal<void (const std::shared_ptr<const CBlock> &)> BlockDisconnected; + boost::signals2::signal<void (const CTransactionRef &)> TransactionRemovedFromMempool; + boost::signals2::signal<void (const CBlockLocator &)> ChainStateFlushed; + boost::signals2::signal<void (int64_t nBestBlockTime, CConnman* connman)> Broadcast; + boost::signals2::signal<void (const CBlock&, const CValidationState&)> BlockChecked; + boost::signals2::signal<void (const CBlockIndex *, const std::shared_ptr<const CBlock>&)> NewPoWValidBlock; + + // We are not allowed to assume the scheduler only runs in one thread, + // but must ensure all callbacks happen in-order, so we end up creating + // our own queue here :( + SingleThreadedSchedulerClient m_schedulerClient; + + explicit MainSignalsInstance(CScheduler *pscheduler) : m_schedulerClient(pscheduler) {} +}; + +static CMainSignals g_signals; + +void CMainSignals::RegisterBackgroundSignalScheduler(CScheduler& scheduler) { + assert(!m_internals); + m_internals.reset(new MainSignalsInstance(&scheduler)); +} + +void CMainSignals::UnregisterBackgroundSignalScheduler() { + m_internals.reset(nullptr); +} + +void CMainSignals::FlushBackgroundCallbacks() { + if (m_internals) { + m_internals->m_schedulerClient.EmptyQueue(); + } +} + +size_t CMainSignals::CallbacksPending() { + if (!m_internals) return 0; + return m_internals->m_schedulerClient.CallbacksPending(); +} + +void CMainSignals::RegisterWithMempoolSignals(CTxMemPool& pool) { + pool.NotifyEntryRemoved.connect(boost::bind(&CMainSignals::MempoolEntryRemoved, this, _1, _2)); +} + +void CMainSignals::UnregisterWithMempoolSignals(CTxMemPool& pool) { + pool.NotifyEntryRemoved.disconnect(boost::bind(&CMainSignals::MempoolEntryRemoved, this, _1, _2)); +} + +CMainSignals& GetMainSignals() +{ + return g_signals; +} + +void RegisterValidationInterface(CValidationInterface* pwalletIn) { + g_signals.m_internals->UpdatedBlockTip.connect(boost::bind(&CValidationInterface::UpdatedBlockTip, pwalletIn, _1, _2, _3)); + g_signals.m_internals->TransactionAddedToMempool.connect(boost::bind(&CValidationInterface::TransactionAddedToMempool, pwalletIn, _1)); + g_signals.m_internals->BlockConnected.connect(boost::bind(&CValidationInterface::BlockConnected, pwalletIn, _1, _2, _3)); + g_signals.m_internals->BlockDisconnected.connect(boost::bind(&CValidationInterface::BlockDisconnected, pwalletIn, _1)); + g_signals.m_internals->TransactionRemovedFromMempool.connect(boost::bind(&CValidationInterface::TransactionRemovedFromMempool, pwalletIn, _1)); + g_signals.m_internals->ChainStateFlushed.connect(boost::bind(&CValidationInterface::ChainStateFlushed, pwalletIn, _1)); + g_signals.m_internals->Broadcast.connect(boost::bind(&CValidationInterface::ResendWalletTransactions, pwalletIn, _1, _2)); + g_signals.m_internals->BlockChecked.connect(boost::bind(&CValidationInterface::BlockChecked, pwalletIn, _1, _2)); + g_signals.m_internals->NewPoWValidBlock.connect(boost::bind(&CValidationInterface::NewPoWValidBlock, pwalletIn, _1, _2)); +} + +void UnregisterValidationInterface(CValidationInterface* pwalletIn) { + g_signals.m_internals->BlockChecked.disconnect(boost::bind(&CValidationInterface::BlockChecked, pwalletIn, _1, _2)); + g_signals.m_internals->Broadcast.disconnect(boost::bind(&CValidationInterface::ResendWalletTransactions, pwalletIn, _1, _2)); + g_signals.m_internals->ChainStateFlushed.disconnect(boost::bind(&CValidationInterface::ChainStateFlushed, pwalletIn, _1)); + g_signals.m_internals->TransactionAddedToMempool.disconnect(boost::bind(&CValidationInterface::TransactionAddedToMempool, pwalletIn, _1)); + g_signals.m_internals->BlockConnected.disconnect(boost::bind(&CValidationInterface::BlockConnected, pwalletIn, _1, _2, _3)); + g_signals.m_internals->BlockDisconnected.disconnect(boost::bind(&CValidationInterface::BlockDisconnected, pwalletIn, _1)); + g_signals.m_internals->TransactionRemovedFromMempool.disconnect(boost::bind(&CValidationInterface::TransactionRemovedFromMempool, pwalletIn, _1)); + g_signals.m_internals->UpdatedBlockTip.disconnect(boost::bind(&CValidationInterface::UpdatedBlockTip, pwalletIn, _1, _2, _3)); + g_signals.m_internals->NewPoWValidBlock.disconnect(boost::bind(&CValidationInterface::NewPoWValidBlock, pwalletIn, _1, _2)); +} + +void UnregisterAllValidationInterfaces() { + if (!g_signals.m_internals) { + return; + } + g_signals.m_internals->BlockChecked.disconnect_all_slots(); + g_signals.m_internals->Broadcast.disconnect_all_slots(); + g_signals.m_internals->ChainStateFlushed.disconnect_all_slots(); + g_signals.m_internals->TransactionAddedToMempool.disconnect_all_slots(); + g_signals.m_internals->BlockConnected.disconnect_all_slots(); + g_signals.m_internals->BlockDisconnected.disconnect_all_slots(); + g_signals.m_internals->TransactionRemovedFromMempool.disconnect_all_slots(); + g_signals.m_internals->UpdatedBlockTip.disconnect_all_slots(); + g_signals.m_internals->NewPoWValidBlock.disconnect_all_slots(); +} + +void CallFunctionInValidationInterfaceQueue(std::function<void ()> func) { + g_signals.m_internals->m_schedulerClient.AddToProcessQueue(std::move(func)); +} + +void SyncWithValidationInterfaceQueue() { + AssertLockNotHeld(cs_main); + // Block until the validation queue drains + std::promise<void> promise; + CallFunctionInValidationInterfaceQueue([&promise] { + promise.set_value(); + }); + promise.get_future().wait(); +} + +void CMainSignals::MempoolEntryRemoved(CTransactionRef ptx, MemPoolRemovalReason reason) { + if (reason != MemPoolRemovalReason::BLOCK && reason != MemPoolRemovalReason::CONFLICT) { + m_internals->m_schedulerClient.AddToProcessQueue([ptx, this] { + m_internals->TransactionRemovedFromMempool(ptx); + }); + } +} + +void CMainSignals::UpdatedBlockTip(const CBlockIndex *pindexNew, const CBlockIndex *pindexFork, bool fInitialDownload) { + // Dependencies exist that require UpdatedBlockTip events to be delivered in the order in which + // the chain actually updates. One way to ensure this is for the caller to invoke this signal + // in the same critical section where the chain is updated + + m_internals->m_schedulerClient.AddToProcessQueue([pindexNew, pindexFork, fInitialDownload, this] { + m_internals->UpdatedBlockTip(pindexNew, pindexFork, fInitialDownload); + }); +} + +void CMainSignals::TransactionAddedToMempool(const CTransactionRef &ptx) { + m_internals->m_schedulerClient.AddToProcessQueue([ptx, this] { + m_internals->TransactionAddedToMempool(ptx); + }); +} + +void CMainSignals::BlockConnected(const std::shared_ptr<const CBlock> &pblock, const CBlockIndex *pindex, const std::shared_ptr<const std::vector<CTransactionRef>>& pvtxConflicted) { + m_internals->m_schedulerClient.AddToProcessQueue([pblock, pindex, pvtxConflicted, this] { + m_internals->BlockConnected(pblock, pindex, *pvtxConflicted); + }); +} + +void CMainSignals::BlockDisconnected(const std::shared_ptr<const CBlock> &pblock) { + m_internals->m_schedulerClient.AddToProcessQueue([pblock, this] { + m_internals->BlockDisconnected(pblock); + }); +} + +void CMainSignals::ChainStateFlushed(const CBlockLocator &locator) { + m_internals->m_schedulerClient.AddToProcessQueue([locator, this] { + m_internals->ChainStateFlushed(locator); + }); +} + +void CMainSignals::Broadcast(int64_t nBestBlockTime, CConnman* connman) { + m_internals->Broadcast(nBestBlockTime, connman); +} + +void CMainSignals::BlockChecked(const CBlock& block, const CValidationState& state) { + m_internals->BlockChecked(block, state); +} + +void CMainSignals::NewPoWValidBlock(const CBlockIndex *pindex, const std::shared_ptr<const CBlock> &block) { + m_internals->NewPoWValidBlock(pindex, block); +} |