1 /* $Id: dopen.c,v 1.9.2.2 2006-12-05 21:14:40 adam Exp $
2 Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002
5 This file is part of the Zebra server.
7 Zebra is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 Zebra is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 #include <sys/types.h>
31 #include <yaz/xmalloc.h>
34 static void common_init (Dict_BFile bf, int block_size, int cache)
38 bf->block_size = block_size;
43 bf->hits = bf->misses = 0;
45 /* Allocate all blocks in one chunk. */
46 bf->all_data = xmalloc (block_size * cache);
48 /* Allocate and initialize hash array (as empty) */
49 bf->hash_array = (struct Dict_file_block **)
50 xmalloc(sizeof(*bf->hash_array) * bf->hash_size);
51 for (i=bf->hash_size; --i >= 0; )
52 bf->hash_array[i] = NULL;
54 /* Allocate all block descriptors in one chunk */
55 bf->all_blocks = (struct Dict_file_block *)
56 xmalloc (sizeof(*bf->all_blocks) * cache);
58 /* Initialize the free list */
59 bf->free_list = bf->all_blocks;
60 for (i=0; i<cache-1; i++)
61 bf->all_blocks[i].h_next = bf->all_blocks+(i+1);
62 bf->all_blocks[i].h_next = NULL;
64 /* Initialize the data for each block. Will never be moved again */
65 for (i=0; i<cache; i++)
66 bf->all_blocks[i].data = (char*) bf->all_data + i*block_size;
68 /* Initialize lru queue */
74 Dict_BFile dict_bf_open (BFiles bfs, const char *name, int block_size,
79 dbf = (Dict_BFile) xmalloc (sizeof(*dbf));
80 dbf->bf = bf_open (bfs, name, block_size, rw);
83 common_init (dbf, block_size, cache);
87 void dict_bf_compact (Dict_BFile dbf)
89 dbf->compact_flag = 1;