src/txdb.h

   1 // Copyright (c) 2009-2010 Satoshi Nakamoto
   2 // Copyright (c) 2009-2014 The Bitcoin Core developers
   3 // Distributed under the MIT software license, see the accompanying
   4 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   5
   6 #ifndef BITCOIN_TXDB_H
   7 #define BITCOIN_TXDB_H
   8
   9 #include "coins.h"
  10 #include "leveldbwrapper.h"
  11
  12 #include <map>
  13 #include <string>
  14 #include <utility>
  15 #include <vector>
  16
  17 class CBlockFileInfo;
  18 class CBlockIndex;
  19 struct CDiskTxPos;
  20 class uint256;
  21
  22 //! -dbcache default (MiB)
  23 static const int64_t nDefaultDbCache = 100;
  24 //! max. -dbcache in (MiB)
  25 static const int64_t nMaxDbCache = sizeof(void*) > 4 ? 16384 : 1024;
  26 //! min. -dbcache in (MiB)
  27 static const int64_t nMinDbCache = 4;
  28
  29 /** CCoinsView backed by the LevelDB coin database (chainstate/) */
  30 class CCoinsViewDB : public CCoinsView
  31 {
  32 protected:
  33     CLevelDBWrapper db;
  34 public:
  35     CCoinsViewDB(size_t nCacheSize, bool fMemory = false, bool fWipe = false);
  36
  37     bool GetCoins(const uint256 &txid, CCoins &coins) const;
  38     bool HaveCoins(const uint256 &txid) const;
  39     uint256 GetBestBlock() const;
  40     bool BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock);
  41     bool GetStats(CCoinsStats &stats) const;
  42 };
  43
  44 /** Access to the block database (blocks/index/) */
  45 class CBlockTreeDB : public CLevelDBWrapper
  46 {
  47 public:
  48     CBlockTreeDB(size_t nCacheSize, bool fMemory = false, bool fWipe = false);
  49 private:
  50     CBlockTreeDB(const CBlockTreeDB&);
  51     void operator=(const CBlockTreeDB&);
  52 public:
  53     bool WriteBatchSync(const std::vector<std::pair<int, const CBlockFileInfo*> >& fileInfo, int nLastFile, const std::vector<const CBlockIndex*>& blockinfo);
  54     bool ReadBlockFileInfo(int nFile, CBlockFileInfo &fileinfo);
  55     bool ReadLastBlockFile(int &nFile);
  56     bool WriteReindexing(bool fReindex);
  57     bool ReadReindexing(bool &fReindex);
  58     bool ReadTxIndex(const uint256 &txid, CDiskTxPos &pos);
  59     bool WriteTxIndex(const std::vector<std::pair<uint256, CDiskTxPos> > &list);
  60     bool WriteFlag(const std::string &name, bool fValue);
  61     bool ReadFlag(const std::string &name, bool &fValue);
  62     bool LoadBlockIndexGuts();
  63 };
  64
  65 #endif // BITCOIN_TXDB_H