50 lines
1.4 KiB
C++
50 lines
1.4 KiB
C++
#ifndef BTREE_H
|
|
#define BTREE_H
|
|
|
|
#include "transaction_manager.h"
|
|
|
|
//----------------------------------------------------------------
|
|
|
|
namespace persistent_data {
|
|
template <unsigned Levels, typename ValueTraits, uint32_t BlockSize>
|
|
class btree {
|
|
public:
|
|
typedef uint64_t key[Levels];
|
|
typedef typename ValueTraits::value_type value_type;
|
|
typedef boost::optional<value_type> maybe_value;
|
|
typedef boost::optional<std::pair<unsigned, value_type> > maybe_pair;
|
|
typedef boost::shared_ptr<btree<Levels, ValueTraits, BlockSize> > ptr;
|
|
typedef typename block_manager<BlockSize>::read_ref read_ref;
|
|
typedef typename block_manager<BlockSize>::write_ref write_ref;
|
|
|
|
btree(boost::shared_ptr<transaction_manager<BlockSize> > tm);
|
|
btree(boost::shared_ptr<transaction_manager<BlockSize> > tm,
|
|
block_address root);
|
|
~btree();
|
|
|
|
maybe_value lookup(key const &key) const;
|
|
maybe_pair lookup_le(key const &key) const;
|
|
maybe_pair lookup_ge(key const &key) const;
|
|
|
|
void insert(key const &key, typename ValueTraits::value_type const &value);
|
|
void remove(key const &key);
|
|
|
|
void set_root(block_address root);
|
|
block_address get_root() const;
|
|
|
|
ptr clone() const;
|
|
|
|
// free the on disk btree when the destructor is called
|
|
void destroy();
|
|
|
|
private:
|
|
typename persistent_data::transaction_manager<BlockSize>::ptr tm_;
|
|
bool destroy_;
|
|
block_address root_;
|
|
};
|
|
};
|
|
|
|
//----------------------------------------------------------------
|
|
|
|
#endif
|