1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
|
// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2015 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_TXDB_H
#define BITCOIN_TXDB_H
#include "coins.h"
#include "dbwrapper.h"
#include "chain.h"
#include <map>
#include <string>
#include <utility>
#include <vector>
#include <boost/function.hpp>
class CBlockIndex;
class CCoinsViewDBCursor;
class uint256;
//! -dbcache default (MiB)
static const int64_t nDefaultDbCache = 100;
//! max. -dbcache in (MiB)
static const int64_t nMaxDbCache = sizeof(void*) > 4 ? 16384 : 1024;
//! min. -dbcache in (MiB)
static const int64_t nMinDbCache = 4;
struct CDiskTxPos : public CDiskBlockPos
{
unsigned int nTxOffset; // after header
ADD_SERIALIZE_METHODS;
template <typename Stream, typename Operation>
inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
READWRITE(*(CDiskBlockPos*)this);
READWRITE(VARINT(nTxOffset));
}
CDiskTxPos(const CDiskBlockPos &blockIn, unsigned int nTxOffsetIn) : CDiskBlockPos(blockIn.nFile, blockIn.nPos), nTxOffset(nTxOffsetIn) {
}
CDiskTxPos() {
SetNull();
}
void SetNull() {
CDiskBlockPos::SetNull();
nTxOffset = 0;
}
};
/** CCoinsView backed by the coin database (chainstate/) */
class CCoinsViewDB : public CCoinsView
{
protected:
CDBWrapper db;
public:
CCoinsViewDB(size_t nCacheSize, bool fMemory = false, bool fWipe = false);
bool GetCoins(const uint256 &txid, CCoins &coins) const;
bool HaveCoins(const uint256 &txid) const;
uint256 GetBestBlock() const;
bool BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock);
CCoinsViewCursor *Cursor() const;
};
/** Specialization of CCoinsViewCursor to iterate over a CCoinsViewDB */
class CCoinsViewDBCursor: public CCoinsViewCursor
{
public:
~CCoinsViewDBCursor() {}
bool GetKey(uint256 &key) const;
bool GetValue(CCoins &coins) const;
unsigned int GetValueSize() const;
bool Valid() const;
void Next();
private:
CCoinsViewDBCursor(CDBIterator* pcursorIn, const uint256 &hashBlockIn):
CCoinsViewCursor(hashBlockIn), pcursor(pcursorIn) {}
boost::scoped_ptr<CDBIterator> pcursor;
std::pair<char, uint256> keyTmp;
friend class CCoinsViewDB;
};
/** Access to the block database (blocks/index/) */
class CBlockTreeDB : public CDBWrapper
{
public:
CBlockTreeDB(size_t nCacheSize, bool fMemory = false, bool fWipe = false);
private:
CBlockTreeDB(const CBlockTreeDB&);
void operator=(const CBlockTreeDB&);
public:
bool WriteBatchSync(const std::vector<std::pair<int, const CBlockFileInfo*> >& fileInfo, int nLastFile, const std::vector<const CBlockIndex*>& blockinfo);
bool ReadBlockFileInfo(int nFile, CBlockFileInfo &fileinfo);
bool ReadLastBlockFile(int &nFile);
bool WriteReindexing(bool fReindex);
bool ReadReindexing(bool &fReindex);
bool ReadTxIndex(const uint256 &txid, CDiskTxPos &pos);
bool WriteTxIndex(const std::vector<std::pair<uint256, CDiskTxPos> > &list);
bool WriteFlag(const std::string &name, bool fValue);
bool ReadFlag(const std::string &name, bool &fValue);
bool LoadBlockIndexGuts(boost::function<CBlockIndex*(const uint256&)> insertBlockIndex);
};
#endif // BITCOIN_TXDB_H
|
