Record processor to implement DBM::CompareExchange. More...

#include <tkrzw_dbm.h>

Public Member Functions
	RecordProcessorCompareExchange (Status status, std::string_view expected, std::string_view desired, std::string actual, bool *found)
	Constructor. More...

std::string_view	ProcessFull (std::string_view key, std::string_view value) override
	Processes an existing record. More...

std::string_view	ProcessEmpty (std::string_view key) override
	Processes an empty record space. More...

Public Member Functions inherited from tkrzw::DBM::RecordProcessor
virtual	~RecordProcessor ()=default
	Destructor. More...

Additional Inherited Members
Static Public Attributes inherited from tkrzw::DBM::RecordProcessor
static const std::string_view	NOOP
	The special string indicating no operation. More...

static const std::string_view	REMOVE
	The special string indicating removing operation. More...

Detailed Description

Record processor to implement DBM::CompareExchange.

Constructor & Destructor Documentation

tkrzw::DBM::RecordProcessorCompareExchange::RecordProcessorCompareExchange	(	Status *	status,
		std::string_view	expected,
		std::string_view	desired,
		std::string *	actual,
		bool *	found
	)

Constructor.

Parameters

status	The pointer to a status object to contain the result status.
expected	A string of the expected value.
desired	A string of the expected value.
actual	The pointer to a string object to contain the actual value. If it is nullptr, it is ignored.
found	The pointer to a variable to contain whether there is an existing record. If it is nullptr, it is ignored.

std::string_view tkrzw::DBM::RecordProcessorCompareExchange::ProcessFull	(	std::string_view	key,
		std::string_view	value
	)

overridevirtual

Processes an existing record.

std::string_view tkrzw::DBM::RecordProcessorCompareExchange::ProcessEmpty ( std::string_view key )

overridevirtual

Processes an empty record space.