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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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17
include/db-sqlite3.h
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@@ -2,19 +2,30 @@
#define _DB_SQLITE3_H
#include "db.h"
#include <unordered_map>
#include <sqlite3.h>
class DBSQLite3 : public DB {
public:
DBSQLite3(const std::string &mapdir);
virtual std::vector<BlockPos> getBlockPos();
virtual void getBlocksOnZ(std::map<int16_t, BlockList> &blocks, int16_t zPos);
virtual ~DBSQLite3();
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;
~DBSQLite3() override;
private:
inline void getPosRange(int64_t &min, int64_t &max, int16_t zPos,
int16_t zPos2) const;
void loadBlockCache(int16_t zPos);
sqlite3 *db;
sqlite3_stmt *stmt_get_block_pos;
sqlite3_stmt *stmt_get_block_pos_z;
sqlite3_stmt *stmt_get_blocks_z;
int16_t blockCachedZ = -10000;
std::unordered_map<int16_t, BlockList> blockCache; // indexed by X
};
#endif // _DB_SQLITE3_H