mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-11-05 04:05:34 +00:00
114 lines
3.6 KiB
C
114 lines
3.6 KiB
C
/*
|
|
* Copyright (c) 2010, Swedish Institute of Computer Science
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
/**
|
|
* \file
|
|
* .
|
|
* \author
|
|
* Nicolas Tsiftes <nvt@sics.se>
|
|
*/
|
|
|
|
#ifndef INDEX_H
|
|
#define INDEX_H
|
|
|
|
#include "relation.h"
|
|
|
|
typedef enum {
|
|
INDEX_NONE = 0,
|
|
INDEX_INLINE = 1,
|
|
INDEX_MEMHASH = 2,
|
|
INDEX_MAXHEAP = 3
|
|
} index_type_t;
|
|
|
|
#define INDEX_READY 0x00
|
|
#define INDEX_LOAD_NEEDED 0x01
|
|
#define INDEX_LOAD_ERROR 0x02
|
|
|
|
#define INDEX_API_INTERNAL 0x01
|
|
#define INDEX_API_EXTERNAL 0x02
|
|
#define INDEX_API_INLINE 0x04
|
|
#define INDEX_API_COMPLETE 0x08
|
|
#define INDEX_API_RANGE_QUERIES 0x10
|
|
|
|
struct index_api;
|
|
|
|
struct index {
|
|
struct index *next;
|
|
char descriptor_file[DB_MAX_FILENAME_LENGTH];
|
|
relation_t *rel;
|
|
attribute_t *attr;
|
|
struct index_api *api;
|
|
void *opaque_data;
|
|
index_type_t type;
|
|
uint8_t flags;
|
|
};
|
|
|
|
typedef struct index index_t;
|
|
|
|
struct index_iterator {
|
|
index_t *index;
|
|
attribute_value_t min_value;
|
|
attribute_value_t max_value;
|
|
tuple_id_t next_item_no;
|
|
tuple_id_t found_items;
|
|
};
|
|
typedef struct index_iterator index_iterator_t;
|
|
|
|
struct index_api {
|
|
index_type_t type;
|
|
uint8_t flags;
|
|
db_result_t (*create)(index_t *);
|
|
db_result_t (*destroy)(index_t *);
|
|
db_result_t (*load)(index_t *);
|
|
db_result_t (*release)(index_t *);
|
|
db_result_t (*insert)(index_t *, attribute_value_t *, tuple_id_t);
|
|
db_result_t (*delete)(index_t *, attribute_value_t *);
|
|
tuple_id_t (*get_next)(index_iterator_t *);
|
|
};
|
|
|
|
typedef struct index_api index_api_t;
|
|
|
|
extern index_api_t index_inline;
|
|
extern index_api_t index_maxheap;
|
|
extern index_api_t index_memhash;
|
|
|
|
void index_init(void);
|
|
db_result_t index_create(index_type_t, relation_t *, attribute_t *);
|
|
db_result_t index_destroy(index_t *);
|
|
db_result_t index_load(relation_t *, attribute_t *);
|
|
db_result_t index_release(index_t *);
|
|
db_result_t index_insert(index_t *, attribute_value_t *, tuple_id_t);
|
|
db_result_t index_delete(index_t *, attribute_value_t *);
|
|
db_result_t index_get_iterator(index_iterator_t *, index_t *,
|
|
attribute_value_t *, attribute_value_t *);
|
|
tuple_id_t index_get_next(index_iterator_t *);
|
|
int index_exists(attribute_t *);
|
|
|
|
#endif /* !INDEX_H */
|