7c2cf3efa9
As tests using --sqlite-cacheworldrow showed a consistently lower performance than without, this option was effectively disabled. It is still recognised for compatibility, but it may be removed some time in the future.
72 lines
1.5 KiB
C++
72 lines
1.5 KiB
C++
#include "db-leveldb.h"
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#include <stdexcept>
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#include <sstream>
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#include "types.h"
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inline int64_t stoi64(const std::string &s) {
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std::stringstream tmp(s);
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long long t;
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tmp >> t;
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return t;
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}
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inline std::string i64tos(int64_t i) {
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std::ostringstream o;
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o<<i;
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return o.str();
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}
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DBLevelDB::DBLevelDB(const std::string &mapdir) :
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m_blocksReadCount(0),
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m_blocksQueriedCount(0)
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{
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leveldb::Options options;
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options.create_if_missing = false;
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leveldb::Status status = leveldb::DB::Open(options, mapdir + "map.db", &m_db);
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if(!status.ok())
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throw std::runtime_error(std::string("Failed to open Database: ") + status.ToString());
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}
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DBLevelDB::~DBLevelDB() {
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delete m_db;
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}
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int DBLevelDB::getBlocksReadCount(void)
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{
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return m_blocksReadCount;
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}
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int DBLevelDB::getBlocksQueriedCount(void)
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{
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return m_blocksQueriedCount;
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}
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const DB::BlockPosList &DBLevelDB::getBlockPos() {
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m_blockPosList.clear();
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leveldb::Iterator* it = m_db->NewIterator(leveldb::ReadOptions());
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for (it->SeekToFirst(); it->Valid(); it->Next()) {
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m_blockPosList.push_back(BlockPos(it->key().ToString()));
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}
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delete it;
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return m_blockPosList;
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}
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DB::Block DBLevelDB::getBlockOnPos(const BlockPos &pos)
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{
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std::string datastr;
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leveldb::Status status;
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m_blocksQueriedCount++;
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status = m_db->Get(leveldb::ReadOptions(), pos.databasePosStr(), &datastr);
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if(status.ok()) {
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m_blocksReadCount++;
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return Block(pos, ustring(reinterpret_cast<const unsigned char *>(datastr.c_str()), datastr.size()));
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}
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else {
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return Block(pos, ustring(reinterpret_cast<const unsigned char *>("")));
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}
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}
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