An mmap storage. More...

Inheritance diagram for tetengo::trie::mmap_storage:

Collaboration diagram for tetengo::trie::mmap_storage:

Public Member Functions
	mmap_storage (const boost::interprocess::file_mapping &file_mapping_, std::size_t content_offset, std::size_t file_size, value_deserializer value_deserializer_, std::size_t value_cache_capacity=default_value_cache_capacity())
	Creates an mmap storage.

virtual	~mmap_storage ()
	Destroys the mmap storage.

Public Member Functions inherited from tetengo::trie::storage
	storage ()
	Creates a storage.

virtual	~storage ()
	Destroys the storage.

std::size_t	base_check_size () const
	Returns the base-check size.

std::int32_t	base_at (std::size_t base_check_index) const
	Returns the base value.

void	set_base_at (std::size_t base_check_index, std::int32_t base)
	Sets a base value.

std::uint8_t	check_at (std::size_t base_check_index) const
	Returns the check value.

void	set_check_at (std::size_t base_check_index, std::uint8_t check)
	Sets a check value.

std::size_t	value_count () const
	Returns the value count.

const std::any *	value_at (std::size_t value_index) const
	Returns the value object.

void	add_value_at (std::size_t value_index, std::any value)
	Adds a value object.

double	filling_rate () const
	Returns the filling rate.

void	serialize (std::ostream &output_stream, const value_serializer &value_serializer_) const
	Serializes this storage.

std::unique_ptr< storage >	clone () const
	Clones this storage.

Static Public Member Functions
static std::size_t	default_value_cache_capacity ()
	Returns the default value cache capacity.

Detailed Description

An mmap storage.

Constructor & Destructor Documentation

tetengo::trie::mmap_storage::mmap_storage	(	const boost::interprocess::file_mapping &	file_mapping_,
		std::size_t	content_offset,
		std::size_t	file_size,
		value_deserializer	value_deserializer_,
		std::size_t	value_cache_capacity = `default_value_cache_capacity()`
	)

Creates an mmap storage.

Parameters

file_mapping_	A file mapping.
content_offset	A content offset in the file.
file_size	The file size.
value_deserializer_	A deserializer for value objects.
value_cache_capacity	A value cache capacity.

Exceptions

std::invalid_argument When content_offset is greater than file_size, or the value size is not fixed.

static std::size_t tetengo::trie::mmap_storage::default_value_cache_capacity ( )

static

Returns the default value cache capacity.

The documentation for this class was generated from the following file: