ha0storage.ic File Reference

Hash storage. More...

#include "ha0storage.h"
#include "hash0hash.h"
#include "mem0mem.h"
#include "univ.i"

Classes
struct	ha_storage_t
	Hash storage for strings. More...
struct	ha_storage_node_t
	Objects of this type are stored in ha_storage_t. More...

Functions
static ha_storage_t *	ha_storage_create (ulint initial_heap_bytes, ulint initial_hash_cells)
	Creates a hash storage. More...
static void	ha_storage_empty (ha_storage_t **storage)
	Empties a hash storage, freeing memory occupied by data chunks. More...
static void	ha_storage_free (ha_storage_t *storage)
	Frees a hash storage and everything it contains, it cannot be used after this call. More...
static ulint	ha_storage_get_size (const ha_storage_t *storage)
	Gets the size of the memory used by a storage. More...

Detailed Description

Hash storage.

Provides a data structure that stores chunks of data in its own storage, avoiding duplicates.

Created September 24, 2007 Vasil Dimov

Function Documentation

ha_storage_create()

static ha_storage_t * ha_storage_create ( ulint  initial_heap_bytes, ulint  initial_hash_cells  )

inlinestatic

Creates a hash storage.

If any of the parameters is 0, then a default value is used.

Returns

own: hash storage

Parameters

initial_heap_bytes	in: initial heap's size
initial_hash_cells	in: initial number of cells in the hash table

ha_storage_empty()

static void ha_storage_empty ( ha_storage_t **  storage )

inlinestatic

Empties a hash storage, freeing memory occupied by data chunks.

This invalidates any pointers previously returned by ha_storage_put(). The hash storage is not invalidated itself and can be used again.

Parameters

storage

in/out: hash storage

ha_storage_free()

static void ha_storage_free ( ha_storage_t *  storage )

inlinestatic

Frees a hash storage and everything it contains, it cannot be used after this call.

This invalidates any pointers previously returned by ha_storage_put().

Parameters

storage

in, own: hash storage

ha_storage_get_size()

static ulint ha_storage_get_size ( const ha_storage_t *  storage )

inlinestatic

Gets the size of the memory used by a storage.

Returns

bytes used

Parameters

storage

in: hash storage