tkrzw::FreeBlockPool Class Reference

Registry of free blocks. More...

#include <tkrzw_dbm_hash_impl.h>

Public Member Functions
	FreeBlockPool (int32_t capacity)
	Constructor. More...
void	SetCapacity (int32_t capacity)
	Sets the capacity. More...
void	Clear ()
	Removes all records. More...
void	InsertFreeBlock (int64_t offset, int32_t size)
	Inserts a free block. More...
bool	FetchFreeBlock (int32_t min_size, FreeBlock *res)
	Fetchs the minimum free block meeting the record size to fit it in. More...
int32_t	Size ()
	Gets the current number of free blocks. More...
std::string	Serialize (int32_t offset_width, int32_t align_pow, int32_t size)
	Serializes records into a string. More...
void	Deserialize (std::string_view str, int32_t offset_width, int32_t align_pow)
	Deserializes a string to set records. More...

Detailed Description

Registry of free blocks.

Constructor & Destructor Documentation

FreeBlockPool()

tkrzw::FreeBlockPool::FreeBlockPool

(

int32_t

capacity

)

Constructor.

Parameters

capacity

The capacity of the pool.

Member Function Documentation

SetCapacity()

void tkrzw::FreeBlockPool::SetCapacity

(

int32_t

capacity

)

Sets the capacity.

Parameters

capacity

The capacity of the pool.

Clear()

void tkrzw::FreeBlockPool::Clear

(

)

Removes all records.

InsertFreeBlock()

void tkrzw::FreeBlockPool::InsertFreeBlock	(	int64_t	offset,
		int32_t	size
	)

Inserts a free block.

Parameters

offset	The offset in the file.
size	The size of the block

FetchFreeBlock()

bool tkrzw::FreeBlockPool::FetchFreeBlock	(	int32_t	min_size,
		FreeBlock *	res
	)

Fetchs the minimum free block meeting the record size to fit it in.

Parameters

min_size	The minimum size of the block to fetch.
res	The pointer to a free block object to store the result.

Returns

True on success or false on failure.

Size()

int32_t tkrzw::FreeBlockPool::Size

(

)

Gets the current number of free blocks.

Returns

The current number of free blocks.

Serialize()

std::string tkrzw::FreeBlockPool::Serialize	(	int32_t	offset_width,
		int32_t	align_pow,
		int32_t	size
	)

Serializes records into a string.

Parameters

offset_width	The offset width.
align_pow	The alignment power.
size	The size of the result string.

Returns

The result string.

Deserialize()

void tkrzw::FreeBlockPool::Deserialize	(	std::string_view	str,
		int32_t	offset_width,
		int32_t	align_pow
	)

Deserializes a string to set records.

Parameters

str	The string to deserialize.
offset_width	The offset width.
align_pow	The alignment power.