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First attempt to make RAII cursors, no tests yet
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Blue 2023-10-25 19:18:23 -03:00
parent a0eebc978d
commit 96d7d9ef64
Signed by: blue
GPG key ID: 9B203B252A63EE38
12 changed files with 374 additions and 233 deletions
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46
src/cursor.h
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@ -38,37 +38,49 @@ private:
openedPrivate /**< - opened with private transaction, only current storage will be notified when cursor is closed*/
};
public:
Cursor();
Cursor(Storage<K, V>* parent);
Cursor(const Cursor& other) = delete;
Cursor(Cursor&& other);
~Cursor();
public:
void open() const;
void open(const Transaction& transaction) const;
void renew() const;
void renew(const Transaction& transaction) const;
void close() const;
Cursor& operator = (const Cursor& other) = delete;
Cursor& operator = (Cursor&& other);
void open();
void open(const Transaction& transaction);
void renew();
void renew(const Transaction& transaction);
void close();
bool opened() const;
bool empty() const;
std::pair<K, V> first() const;
std::pair<K, V> last() const;
std::pair<K, V> next() const;
std::pair<K, V> prev() const;
void drop();
std::pair<K, V> first();
std::pair<K, V> last();
std::pair<K, V> next();
std::pair<K, V> prev();
std::pair<K, V> current() const;
bool set(const K& target);
void first(K& key, V& value) const;
void last(K& key, V& value) const;
void next(K& key, V& value) const;
void prev(K& key, V& value) const;
void first(K& key, V& value);
void last(K& key, V& value);
void next(K& key, V& value);
void prev(K& key, V& value);
void current(K& key, V& value) const;
private:
void terminated() const;
void dropped();
void terminated();
void operateCursorRead(K& key, V& value, MDB_cursor_op operation, const std::string& methodName, const std::string& operationName) const;
private:
Storage<K, V>* storage;
mutable MDB_cursor* cursor;
mutable State state;
MDB_cursor* cursor;
State state;
uint32_t id;
inline static const std::string openCursorMethodName = "Cursor::open"; /**<\brief member function name, just for exceptions*/
inline static const std::string closeCursorMethodName = "Cursor::close"; /**<\brief member function name, just for exceptions*/