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Diffstat (limited to 'bdb/dbinc/db_shash.h')
-rw-r--r-- | bdb/dbinc/db_shash.h | 81 |
1 files changed, 0 insertions, 81 deletions
diff --git a/bdb/dbinc/db_shash.h b/bdb/dbinc/db_shash.h deleted file mode 100644 index 2c54d6145c5..00000000000 --- a/bdb/dbinc/db_shash.h +++ /dev/null @@ -1,81 +0,0 @@ -/*- - * See the file LICENSE for redistribution information. - * - * Copyright (c) 1996-2002 - * Sleepycat Software. All rights reserved. - * - * $Id: db_shash.h,v 11.11 2002/01/11 15:52:26 bostic Exp $ - */ - -#ifndef _DB_SHASH_H_ -#define _DB_SHASH_H_ - -/* Hash Headers */ -typedef SH_TAILQ_HEAD(__hash_head) DB_HASHTAB; - -/* - * HASHLOOKUP -- - * - * Look up something in a shared memory hash table. The "elt" argument - * should be a key, and cmp_func must know how to compare a key to whatever - * structure it is that appears in the hash table. The comparison function - * - * begin: address of the beginning of the hash table. - * ndx: index into table for this item. - * type: the structure type of the elements that are linked in each bucket. - * field: the name of the field by which the "type" structures are linked. - * elt: the item for which we are searching in the hash table. - * res: the variable into which we'll store the element if we find it. - * cmp: called as: cmp(lookup_elt, table_elt). - * - * If the element is not in the hash table, this macro exits with res set - * to NULL. - */ -#define HASHLOOKUP(begin, ndx, type, field, elt, res, cmp) do { \ - DB_HASHTAB *__bucket; \ - \ - __bucket = &begin[ndx]; \ - for (res = SH_TAILQ_FIRST(__bucket, type); \ - res != NULL; res = SH_TAILQ_NEXT(res, field, type)) \ - if (cmp(elt, res)) \ - break; \ -} while (0) - -/* - * HASHINSERT -- - * - * Insert a new entry into the hash table. This assumes that you already - * have the bucket locked and that lookup has failed; don't call it if you - * haven't already called HASHLOOKUP. If you do, you could get duplicate - * entries. - * - * begin: the beginning address of the hash table. - * ndx: the index for this element. - * type: the structure type of the elements that are linked in each bucket. - * field: the name of the field by which the "type" structures are linked. - * elt: the item to be inserted. - */ -#define HASHINSERT(begin, ndx, type, field, elt) do { \ - DB_HASHTAB *__bucket; \ - \ - __bucket = &begin[ndx]; \ - SH_TAILQ_INSERT_HEAD(__bucket, elt, field, type); \ -} while (0) - -/* - * HASHREMOVE_EL -- - * Given the object "obj" in the table, remove it. - * - * begin: address of the beginning of the hash table. - * ndx: index into hash table of where this element belongs. - * type: the structure type of the elements that are linked in each bucket. - * field: the name of the field by which the "type" structures are linked. - * obj: the object in the table that we with to delete. - */ -#define HASHREMOVE_EL(begin, ndx, type, field, obj) { \ - DB_HASHTAB *__bucket; \ - \ - __bucket = &begin[ndx]; \ - SH_TAILQ_REMOVE(__bucket, obj, field, type); \ -} -#endif /* !_DB_SHASH_H_ */ |