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126 lines
4.2 KiB
126 lines
4.2 KiB
// Copyright (c) 2009-2010 Satoshi Nakamoto |
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// Copyright (c) 2009-2016 The Bitcoin Core developers |
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// Distributed under the MIT software license, see the accompanying |
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// file COPYING or http://www.opensource.org/licenses/mit-license.php. |
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#ifndef BITCOIN_TXDB_H |
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#define BITCOIN_TXDB_H |
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#include "coins.h" |
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#include "dbwrapper.h" |
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#include "chain.h" |
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#include <map> |
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#include <string> |
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#include <utility> |
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#include <vector> |
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class CBlockIndex; |
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class CCoinsViewDBCursor; |
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class uint256; |
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//! Compensate for extra memory peak (x1.5-x1.9) at flush time. |
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static constexpr int DB_PEAK_USAGE_FACTOR = 2; |
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//! No need to periodic flush if at least this much space still available. |
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static constexpr int MAX_BLOCK_COINSDB_USAGE = 10 * DB_PEAK_USAGE_FACTOR; |
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//! -dbcache default (MiB) |
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static const int64_t nDefaultDbCache = 450; |
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//! max. -dbcache (MiB) |
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static const int64_t nMaxDbCache = sizeof(void*) > 4 ? 16384 : 1024; |
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//! min. -dbcache (MiB) |
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static const int64_t nMinDbCache = 4; |
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//! Max memory allocated to block tree DB specific cache, if no -txindex (MiB) |
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static const int64_t nMaxBlockDBCache = 2; |
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//! Max memory allocated to block tree DB specific cache, if -txindex (MiB) |
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// Unlike for the UTXO database, for the txindex scenario the leveldb cache make |
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// a meaningful difference: https://github.com/bitcoin/bitcoin/pull/8273#issuecomment-229601991 |
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static const int64_t nMaxBlockDBAndTxIndexCache = 1024; |
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//! Max memory allocated to coin DB specific cache (MiB) |
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static const int64_t nMaxCoinsDBCache = 8; |
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struct CDiskTxPos : public CDiskBlockPos |
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{ |
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unsigned int nTxOffset; // after header |
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ADD_SERIALIZE_METHODS; |
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template <typename Stream, typename Operation> |
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inline void SerializationOp(Stream& s, Operation ser_action) { |
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READWRITE(*(CDiskBlockPos*)this); |
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READWRITE(VARINT(nTxOffset)); |
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} |
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CDiskTxPos(const CDiskBlockPos &blockIn, unsigned int nTxOffsetIn) : CDiskBlockPos(blockIn.nFile, blockIn.nPos), nTxOffset(nTxOffsetIn) { |
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} |
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CDiskTxPos() { |
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SetNull(); |
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} |
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void SetNull() { |
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CDiskBlockPos::SetNull(); |
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nTxOffset = 0; |
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} |
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}; |
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/** CCoinsView backed by the coin database (chainstate/) */ |
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class CCoinsViewDB : public CCoinsView |
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{ |
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protected: |
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CDBWrapper db; |
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public: |
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CCoinsViewDB(size_t nCacheSize, bool fMemory = false, bool fWipe = false); |
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bool GetCoins(const COutPoint &outpoint, Coin &coin) const override; |
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bool HaveCoins(const COutPoint &outpoint) const override; |
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uint256 GetBestBlock() const override; |
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bool BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock) override; |
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CCoinsViewCursor *Cursor() const override; |
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size_t EstimateSize() const override; |
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}; |
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/** Specialization of CCoinsViewCursor to iterate over a CCoinsViewDB */ |
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class CCoinsViewDBCursor: public CCoinsViewCursor |
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{ |
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public: |
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~CCoinsViewDBCursor() {} |
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bool GetKey(COutPoint &key) const; |
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bool GetValue(Coin &coin) const; |
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unsigned int GetValueSize() const; |
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bool Valid() const; |
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void Next(); |
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private: |
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CCoinsViewDBCursor(CDBIterator* pcursorIn, const uint256 &hashBlockIn): |
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CCoinsViewCursor(hashBlockIn), pcursor(pcursorIn) {} |
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std::unique_ptr<CDBIterator> pcursor; |
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std::pair<char, COutPoint> keyTmp; |
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friend class CCoinsViewDB; |
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}; |
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/** Access to the block database (blocks/index/) */ |
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class CBlockTreeDB : public CDBWrapper |
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{ |
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public: |
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CBlockTreeDB(size_t nCacheSize, bool fMemory = false, bool fWipe = false); |
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private: |
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CBlockTreeDB(const CBlockTreeDB&); |
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void operator=(const CBlockTreeDB&); |
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public: |
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bool WriteBatchSync(const std::vector<std::pair<int, const CBlockFileInfo*> >& fileInfo, int nLastFile, const std::vector<const CBlockIndex*>& blockinfo); |
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bool ReadBlockFileInfo(int nFile, CBlockFileInfo &fileinfo); |
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bool ReadLastBlockFile(int &nFile); |
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bool WriteReindexing(bool fReindex); |
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bool ReadReindexing(bool &fReindex); |
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bool ReadTxIndex(const uint256 &txid, CDiskTxPos &pos); |
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bool WriteTxIndex(const std::vector<std::pair<uint256, CDiskTxPos> > &list); |
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bool WriteFlag(const std::string &name, bool fValue); |
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bool ReadFlag(const std::string &name, bool &fValue); |
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bool LoadBlockIndexGuts(std::function<CBlockIndex*(const uint256&)> insertBlockIndex); |
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}; |
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#endif // BITCOIN_TXDB_H
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