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Rewrite DB class to allow backends to fully optimize block fetches

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This commit is contained in:
sfan5
2020-03-27 16:12:26 +01:00
parent ecc2b31f78
commit 5b264fd443
11 changed files with 325 additions and 154 deletions
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16
include/db-leveldb.h
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@@ -2,19 +2,25 @@
#define DB_LEVELDB_HEADER
#include "db.h"
#include <unordered_map>
#include <utility>
#include <leveldb/db.h>
class DBLevelDB : public DB {
public:
DBLevelDB(const std::string &mapdir);
virtual std::vector<BlockPos> getBlockPos();
virtual void getBlocksOnZ(std::map<int16_t, BlockList> &blocks, int16_t zPos);
virtual ~DBLevelDB();
std::vector<BlockPos> getBlockPos(BlockPos min, BlockPos max) override;
void getBlocksOnXZ(BlockList &blocks, int16_t x, int16_t z,
int16_t min_y, int16_t max_y) override;
~DBLevelDB() override;
private:
using pos2d = std::pair<int16_t, int16_t>;
void loadPosCache();
std::vector<BlockPos> posCache;
// indexed by Z, contains all (x,y) position pairs
std::unordered_map<int16_t, std::vector<pos2d>> posCache;
leveldb::DB *db;
};