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@ -24,6 +24,8 @@ static const char DB_BLOCK_FILES = 'f';
@@ -24,6 +24,8 @@ static const char DB_BLOCK_FILES = 'f';
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static const char DB_TXINDEX = 't'; |
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static const char DB_BLOCK_INDEX = 'b'; |
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static const char DB_NAME = 'n'; |
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static const char DB_BEST_BLOCK = 'B'; |
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static const char DB_HEAD_BLOCKS = 'H'; |
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static const char DB_FLAG = 'F'; |
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@ -81,7 +83,103 @@ std::vector<uint256> CCoinsViewDB::GetHeadBlocks() const {
@@ -81,7 +83,103 @@ std::vector<uint256> CCoinsViewDB::GetHeadBlocks() const {
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return vhashHeadBlocks; |
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} |
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bool CCoinsViewDB::BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock) { |
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class CDbNameIterator : public CNameIterator |
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{ |
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private: |
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/* The backing LevelDB iterator. */ |
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CDBIterator* iter; |
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public: |
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~CDbNameIterator(); |
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/**
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* Construct a new name iterator for the database. |
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* @param db The database to create the iterator for. |
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*/ |
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CDbNameIterator(const CDBWrapper& db); |
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/* Implement iterator methods. */ |
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void seek(const valtype& start); |
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bool next(valtype& name, CKevaData& data); |
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}; |
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CDbNameIterator::~CDbNameIterator() { |
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delete iter; |
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} |
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CDbNameIterator::CDbNameIterator(const CDBWrapper& db) |
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: iter(const_cast<CDBWrapper*>(&db)->NewIterator()) |
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{ |
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seek(valtype()); |
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} |
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void CDbNameIterator::seek(const valtype& start) { |
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iter->Seek(std::make_pair(DB_NAME, start)); |
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} |
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bool CDbNameIterator::next(valtype& name, CKevaData& data) { |
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if (!iter->Valid()) |
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return false; |
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std::pair<char, valtype> key; |
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if (!iter->GetKey(key) || key.first != DB_NAME) |
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return false; |
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name = key.second; |
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if (!iter->GetValue(data)) { |
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return error("%s : failed to read data from iterator", __func__); |
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} |
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iter->Next(); |
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return true; |
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} |
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CNameIterator* CCoinsViewDB::IterateNames() const { |
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return new CDbNameIterator(db); |
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} |
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bool CCoinsViewDB::GetName(const valtype &nameSpace, const valtype &key, CKevaData &data) const { |
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return db.Read(std::make_pair(DB_NAME, std::make_pair(nameSpace, key)), data); |
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} |
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bool CCoinsViewDB::GetNamesForHeight(unsigned nHeight, std::set<valtype>& names) const { |
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names.clear(); |
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#if 0 |
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/* It seems that there are no "const iterators" for LevelDB. Since we
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only need read operations on it, use a const-cast to get around |
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that restriction. */ |
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boost::scoped_ptr<CDBIterator> pcursor(const_cast<CDBWrapper*>(&db)->NewIterator()); |
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const CKevaCache::ExpireEntry seekEntry(nHeight, valtype ()); |
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pcursor->Seek(std::make_pair(DB_NAME_EXPIRY, seekEntry)); |
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for (; pcursor->Valid(); pcursor->Next()) |
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{ |
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std::pair<char, CKevaCache::ExpireEntry> key; |
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if (!pcursor->GetKey(key) || key.first != DB_NAME_EXPIRY) |
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break; |
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const CKevaCache::ExpireEntry& entry = key.second; |
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assert (entry.nHeight >= nHeight); |
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if (entry.nHeight > nHeight) |
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break; |
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const valtype& name = entry.name; |
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if (names.count(name) > 0) { |
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return error("%s : duplicate name '%s' in expire index", |
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__func__, ValtypeToString(name).c_str()); |
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} |
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names.insert(name); |
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} |
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#endif |
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return true; |
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} |
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bool CCoinsViewDB::BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock, const CKevaCache &names) { |
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CDBBatch batch(db); |
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size_t count = 0; |
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size_t changed = 0; |
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@ -132,6 +230,8 @@ bool CCoinsViewDB::BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock) {
@@ -132,6 +230,8 @@ bool CCoinsViewDB::BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock) {
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} |
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} |
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names.writeBatch(batch); |
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// In the last batch, mark the database as consistent with hashBlock again.
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batch.Erase(DB_HEAD_BLOCKS); |
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batch.Write(DB_BEST_BLOCK, hashBlock); |
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@ -236,6 +336,35 @@ bool CBlockTreeDB::WriteBatchSync(const std::vector<std::pair<int, const CBlockF
@@ -236,6 +336,35 @@ bool CBlockTreeDB::WriteBatchSync(const std::vector<std::pair<int, const CBlockF
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return WriteBatch(batch, true); |
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} |
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void CKevaCache::writeBatch (CDBBatch& batch) const |
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{ |
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for (EntryMap::const_iterator i = entries.begin(); i != entries.end(); ++i) { |
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auto name = std::make_pair(std::get<0>(i->first), std::get<1>(i->first)); |
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batch.Write(std::make_pair(DB_NAME, name), i->second); |
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} |
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#if 0 |
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for (std::set<valtype>::const_iterator i = deleted.begin(); i != deleted.end(); ++i) { |
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batch.Erase(std::make_pair (DB_NAME, *i)); |
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} |
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assert (fNameHistory || history.empty ()); |
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for (std::map<valtype, CNameHistory>::const_iterator i = history.begin (); |
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i != history.end (); ++i) |
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if (i->second.empty ()) |
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batch.Erase (std::make_pair (DB_NAME_HISTORY, i->first)); |
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else |
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batch.Write (std::make_pair (DB_NAME_HISTORY, i->first), i->second); |
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for (std::map<ExpireEntry, bool>::const_iterator i = expireIndex.begin (); |
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i != expireIndex.end (); ++i) |
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if (i->second) |
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batch.Write (std::make_pair (DB_NAME_EXPIRY, i->first)); |
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else |
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batch.Erase (std::make_pair (DB_NAME_EXPIRY, i->first)); |
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#endif |
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} |
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bool CBlockTreeDB::ReadTxIndex(const uint256 &txid, CDiskTxPos &pos) { |
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return Read(std::make_pair(DB_TXINDEX, txid), pos); |
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} |
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Jianping Wu
6 years ago