dmmlib/private-include/bitmap/bitmap_rb.h

/*
 *   Copyright 2012 Institute of Communication and Computer Systems (ICCS) 
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 *
 */

/**
 * @file   bitmap_rb.h
 * @author Ioannis Koutras (joko@microlab.ntua.gr)
 * @date   September 2012
 * @brief  Bitmap-organized raw block structure and creation function.
 */

#ifndef BITMAP_RB_H
#define BITMAP_RB_H
#include "dmm_config.h"

#include <inttypes.h>
#include <stddef.h> /* for size_t */

#define BMAP_EL_TYPE uint64_t
#define BMAP_EL_SIZE_BITS (sizeof(BMAP_EL_TYPE) * 8)

#define BMAP_INDEX_NUM 20

/** Bitmap-organized raw block header data structure */
typedef struct bitmap_rb_s {
    BMAP_EL_TYPE bmap_array[BMAP_INDEX_NUM];
    size_t bytes_per_cell; /* FIXME - As long as the bitmap arrays are
                              fixed-sized, this is also fixed */
} bitmap_rb_t;

/** Chunk header data structure */
typedef struct chunk_header_s {
    size_t num_of_cells; /**< The number of occupied cells. */
} chunk_header_t;

#endif /* BITMAP_RB_H */