60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
|
#ifndef TRANSACTION_MANAGER_H
|
||
|
|
#define TRANSACTION_MANAGER_H
|
||
|
|
|
||
|
|
#include "block.h"
|
||
|
|
#include "space_map.h"
|
||
|
|
|
||
|
|
#include <set>
|
||
|
|
#include <boost/shared_ptr.hpp>
|
||
|
|
|
||
|
|
//----------------------------------------------------------------
|
||
|
|
|
||
|
|
namespace persistent_data {
|
||
|
|
template <uint32_t MetadataBlockSize>
|
||
|
|
class transaction_manager : public boost::noncopyable {
|
||
|
|
public:
|
||
|
|
typedef boost::shared_ptr<transaction_manager<MetadataBlockSize> > ptr;
|
||
|
|
|
||
|
|
transaction_manager(typename block_manager<MetadataBlockSize>::ptr bm,
|
||
|
|
space_map::ptr sm);
|
||
|
|
~transaction_manager();
|
||
|
|
|
||
|
|
typedef typename block_manager<MetadataBlockSize>::read_ref read_ref;
|
||
|
|
typedef typename block_manager<MetadataBlockSize>::write_ref write_ref;
|
||
|
|
typedef typename block_manager<MetadataBlockSize>::block_validator block_validator;
|
||
|
|
|
||
|
|
void reserve_block(block_address location);
|
||
|
|
void begin();
|
||
|
|
void pre_commit();
|
||
|
|
void commit(write_ref superblock);
|
||
|
|
|
||
|
|
block_address alloc_block();
|
||
|
|
write_ref new_block();
|
||
|
|
write_ref new_block(block_validator const &v);
|
||
|
|
|
||
|
|
write_ref shadow(block_address orig, bool &inc_children);
|
||
|
|
write_ref shadow(block_address orig, block_validator const &v, bool &inc_children);
|
||
|
|
|
||
|
|
read_ref read_lock(block_address b);
|
||
|
|
read_ref read_lock(block_address b, block_validator const &v);
|
||
|
|
|
||
|
|
void inc(block_address b);
|
||
|
|
void dec(block_address b);
|
||
|
|
uint32_t ref_count(block_address b) const;
|
||
|
|
|
||
|
|
private:
|
||
|
|
void add_shadow(block_address b);
|
||
|
|
bool is_shadow(block_address b);
|
||
|
|
void wipe_shadow_table();
|
||
|
|
|
||
|
|
typename block_manager<MetadataBlockSize>::ptr bm_;
|
||
|
|
space_map::ptr sm_;
|
||
|
|
|
||
|
|
std::set<block_address> shadows_;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
//----------------------------------------------------------------
|
||
|
|
|
||
|
|
#endif
|