extern.h revision 331722 
1/*-
2 * Copyright (c) 1991, 1993, 1994
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 *	@(#)extern.h	8.4 (Berkeley) 6/16/94
30 * $FreeBSD: stable/11/lib/libc/db/hash/extern.h 331722 2018-03-29 02:50:57Z eadler $
31 */
32
33BUFHEAD	*__add_ovflpage(HTAB *, BUFHEAD *);
34int	 __addel(HTAB *, BUFHEAD *, const DBT *, const DBT *);
35int	 __big_delete(HTAB *, BUFHEAD *);
36int	 __big_insert(HTAB *, BUFHEAD *, const DBT *, const DBT *);
37int	 __big_keydata(HTAB *, BUFHEAD *, DBT *, DBT *, int);
38int	 __big_return(HTAB *, BUFHEAD *, int, DBT *, int);
39int	 __big_split(HTAB *, BUFHEAD *, BUFHEAD *, BUFHEAD *,
40		int, u_int32_t, SPLIT_RETURN *);
41int	 __buf_free(HTAB *, int, int);
42void	 __buf_init(HTAB *, int);
43u_int32_t	 __call_hash(HTAB *, char *, int);
44int	 __delpair(HTAB *, BUFHEAD *, int);
45int	 __expand_table(HTAB *);
46int	 __find_bigpair(HTAB *, BUFHEAD *, int, char *, int);
47u_int16_t	 __find_last_page(HTAB *, BUFHEAD **);
48void	 __free_ovflpage(HTAB *, BUFHEAD *);
49BUFHEAD	*__get_buf(HTAB *, u_int32_t, BUFHEAD *, int);
50int	 __get_page(HTAB *, char *, u_int32_t, int, int, int);
51int	 __ibitmap(HTAB *, int, int, int);
52u_int32_t	 __log2(u_int32_t);
53int	 __put_page(HTAB *, char *, u_int32_t, int, int);
54void	 __reclaim_buf(HTAB *, BUFHEAD *);
55int	 __split_page(HTAB *, u_int32_t, u_int32_t);
56
57/* Default hash routine. */
58extern u_int32_t (*__default_hash)(const void *, size_t);
59
60#ifdef HASH_STATISTICS
61extern int hash_accesses, hash_collisions, hash_expansions, hash_overflows;
62#endif
63