62 lines
1.6 KiB
C++
62 lines
1.6 KiB
C++
#ifndef CACHE_METADATA_H
|
|
#define CACHE_METADATA_H
|
|
|
|
#include "base/endian_utils.h"
|
|
|
|
#include "persistent-data/block.h"
|
|
#include "persistent-data/data-structures/array.h"
|
|
#include "persistent-data/data-structures/bitset.h"
|
|
#include "persistent-data/space-maps/disk.h"
|
|
#include "persistent-data/transaction_manager.h"
|
|
|
|
#include "caching/superblock.h"
|
|
#include "caching/hint_array.h"
|
|
#include "caching/mapping_array.h"
|
|
|
|
//----------------------------------------------------------------
|
|
|
|
namespace caching {
|
|
class metadata {
|
|
public:
|
|
enum open_type {
|
|
CREATE
|
|
};
|
|
|
|
typedef block_manager::read_ref read_ref;
|
|
typedef block_manager::write_ref write_ref;
|
|
typedef std::shared_ptr<metadata> ptr;
|
|
|
|
metadata(block_manager::ptr bm, open_type ot, unsigned metadata_version = 2); // Create only
|
|
metadata(block_manager::ptr bm, bool read_space_map = false);
|
|
|
|
void commit(bool clean_shutdown = true);
|
|
void setup_hint_array(size_t width);
|
|
|
|
|
|
typedef persistent_data::transaction_manager tm;
|
|
tm::ptr tm_;
|
|
superblock sb_;
|
|
checked_space_map::ptr metadata_sm_;
|
|
mapping_array::ptr mappings_;
|
|
hint_array::ptr hints_;
|
|
persistent_data::bitset::ptr discard_bits_;
|
|
persistent_data::bitset::ptr dirty_bits_;
|
|
|
|
private:
|
|
void init_superblock();
|
|
|
|
void create_metadata(block_manager::ptr bm, unsigned metadata_version);
|
|
void open_metadata(block_manager::ptr bm, bool read_space_map);
|
|
|
|
void commit_space_map();
|
|
void commit_mappings();
|
|
void commit_hints();
|
|
void commit_discard_bits();
|
|
void commit_superblock(bool clean_shutdown);
|
|
};
|
|
};
|
|
|
|
//----------------------------------------------------------------
|
|
|
|
#endif
|