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libbfio_pool.h
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libbfio_pool.h
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/*
* The internal pool functions
*
* Copyright (c) 2009-2011, Joachim Metz <jbmetz@users.sourceforge.net>
*
* Refer to AUTHORS for acknowledgements.
*
* This software is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this software. If not, see <http://www.gnu.org/licenses/>.
*/
#if !defined( _LIBBFIO_POOL_H )
#define _LIBBFIO_POOL_H
#include <common.h>
#include <types.h>
#include <liberror.h>
#include "libbfio_extern.h"
#include "libbfio_list_type.h"
#include "libbfio_types.h"
#if defined( __cplusplus )
extern "C" {
#endif
typedef struct libbfio_internal_pool libbfio_internal_pool_t;
struct libbfio_internal_pool
{
/* The number of handles in the pool
*/
int number_of_handles;
/* The number of used handles in the pool
*/
int number_of_used_handles;
/* The number of open handles in the pool
*/
int number_of_open_handles;
/* The maximum number of open handles in the pool
*/
int maximum_number_of_open_handles;
/* A dynamic array containing the handles
*/
libbfio_handle_t **handles;
/* A list containing the file IO handles in order of the last use
* it starts with the last used at the beginning of the list
* the value of the list element refers to the corresponding file IO handle
*/
libbfio_list_t *last_used_list;
};
LIBBFIO_EXTERN \
int libbfio_pool_initialize(
libbfio_pool_t **pool,
int number_of_handles,
int maximum_number_of_open_handles,
liberror_error_t **error );
LIBBFIO_EXTERN \
int libbfio_pool_free(
libbfio_pool_t **pool,
liberror_error_t **error );
LIBBFIO_EXTERN \
int libbfio_pool_clone(
libbfio_pool_t **destination_pool,
libbfio_pool_t *source_pool,
liberror_error_t **error );
LIBBFIO_EXTERN \
int libbfio_pool_resize(
libbfio_pool_t *pool,
int number_of_handles,
liberror_error_t **error );
int libbfio_pool_open_handle(
libbfio_internal_pool_t *internal_pool,
libbfio_handle_t *handle,
int access_flags,
liberror_error_t **error );
int libbfio_pool_append_handle_to_last_used_list(
libbfio_internal_pool_t *internal_pool,
libbfio_handle_t *handle,
liberror_error_t **error );
int libbfio_pool_move_handle_to_front_of_last_used_list(
libbfio_internal_pool_t *internal_pool,
libbfio_handle_t *handle,
liberror_error_t **error );
LIBBFIO_EXTERN \
int libbfio_pool_get_number_of_handles(
libbfio_pool_t *pool,
int *number_of_handles,
liberror_error_t **error );
LIBBFIO_EXTERN \
int libbfio_pool_get_handle(
libbfio_pool_t *pool,
int entry,
libbfio_handle_t **handle,
liberror_error_t **error );
LIBBFIO_EXTERN \
int libbfio_pool_append_handle(
libbfio_pool_t *pool,
int *entry,
libbfio_handle_t *handle,
int access_flags,
liberror_error_t **error );
LIBBFIO_EXTERN \
int libbfio_pool_set_handle(
libbfio_pool_t *pool,
int entry,
libbfio_handle_t *handle,
int access_flags,
liberror_error_t **error );
LIBBFIO_EXTERN \
int libbfio_pool_open(
libbfio_pool_t *pool,
int entry,
int access_flags,
liberror_error_t **error );
LIBBFIO_EXTERN \
int libbfio_pool_reopen(
libbfio_pool_t *pool,
int entry,
int access_flags,
liberror_error_t **error );
LIBBFIO_EXTERN \
int libbfio_pool_close(
libbfio_pool_t *pool,
int entry,
liberror_error_t **error );
LIBBFIO_EXTERN \
int libbfio_pool_close_all(
libbfio_pool_t *pool,
liberror_error_t **error );
LIBBFIO_EXTERN \
ssize_t libbfio_pool_read(
libbfio_pool_t *pool,
int entry,
uint8_t *buffer,
size_t size,
liberror_error_t **error );
LIBBFIO_EXTERN \
ssize_t libbfio_pool_write(
libbfio_pool_t *pool,
int entry,
const uint8_t *buffer,
size_t size,
liberror_error_t **error );
LIBBFIO_EXTERN \
off64_t libbfio_pool_seek_offset(
libbfio_pool_t *pool,
int entry,
off64_t offset,
int whence,
liberror_error_t **error );
LIBBFIO_EXTERN \
int libbfio_pool_get_size(
libbfio_pool_t *pool,
int entry,
size64_t *size,
liberror_error_t **error );
LIBBFIO_EXTERN \
int libbfio_pool_get_offset(
libbfio_pool_t *pool,
int entry,
off64_t *offset,
liberror_error_t **error );
LIBBFIO_EXTERN \
int libbfio_pool_get_maximum_number_of_open_handles(
libbfio_pool_t *pool,
int *maximum_number_of_open_handles,
liberror_error_t **error );
LIBBFIO_EXTERN \
int libbfio_pool_set_maximum_number_of_open_handles(
libbfio_pool_t *pool,
int maximum_number_of_open_handles,
liberror_error_t **error );
#if defined( __cplusplus )
}
#endif
#endif

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