db/hash/FreeBSD/extern.h

   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  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)extern.h    8.4 (Berkeley) 6/16/94
  34  * $FreeBSD: src/lib/libc/db/hash/extern.h,v 1.3 2002/03/22 09:18:22 obrien Exp $
  35  */
  36
  37 BUFHEAD *__add_ovflpage(HTAB *, BUFHEAD *);
  38 int      __addel(HTAB *, BUFHEAD *, const DBT *, const DBT *);
  39 int      __big_delete(HTAB *, BUFHEAD *);
  40 int      __big_insert(HTAB *, BUFHEAD *, const DBT *, const DBT *);
  41 int      __big_keydata(HTAB *, BUFHEAD *, DBT *, DBT *, int);
  42 int      __big_return(HTAB *, BUFHEAD *, int, DBT *, int);
  43 int      __big_split(HTAB *, BUFHEAD *, BUFHEAD *, BUFHEAD *,
  44                 int, u_int32_t, SPLIT_RETURN *);
  45 int      __buf_free(HTAB *, int, int);
  46 void     __buf_init(HTAB *, int);
  47 u_int32_t        __call_hash(HTAB *, char *, int);
  48 int      __delpair(HTAB *, BUFHEAD *, int);
  49 int      __expand_table(HTAB *);
  50 int      __find_bigpair(HTAB *, BUFHEAD *, int, char *, int);
  51 u_int16_t        __find_last_page(HTAB *, BUFHEAD **);
  52 void     __free_ovflpage(HTAB *, BUFHEAD *);
  53 BUFHEAD *__get_buf(HTAB *, u_int32_t, BUFHEAD *, int);
  54 int      __get_page(HTAB *, char *, u_int32_t, int, int, int);
  55 int      __ibitmap(HTAB *, int, int, int);
  56 u_int32_t        __log2(u_int32_t);
  57 int      __put_page(HTAB *, char *, u_int32_t, int, int);
  58 void     __reclaim_buf(HTAB *, BUFHEAD *);
  59 int      __split_page(HTAB *, u_int32_t, u_int32_t);
  60
  61 /* Default hash routine. */
  62 extern u_int32_t (*__default_hash)(const void *, size_t);
  63
  64 #ifdef HASH_STATISTICS
  65 extern int hash_accesses, hash_collisions, hash_expansions, hash_overflows;
  66 #endif