* Copyright (c) 1990, 1993, 1994
* The Regents of the University of California. All rights reserved.
* This code is derived from software contributed to Berkeley by
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University 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 REGENTS 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 REGENTS OR CONTRIBUTORS BE LIABLE
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* 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
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid
[] = "@(#)bt_get.c 8.6 (Berkeley) 7/20/94";
#endif /* LIBC_SCCS and not lint */
* __BT_GET -- Get a record from the btree.
* dbp: pointer to access method
* RET_ERROR, RET_SUCCESS and RET_SPECIAL if the key not found.
__bt_get(dbp
, key
, data
, flags
)
/* Toss any page pinned across calls. */
if (t
->bt_pinned
!= NULL
) {
mpool_put(t
->bt_mp
, t
->bt_pinned
, 0);
/* Get currently doesn't take any flags. */
if ((e
= __bt_search(t
, key
, &exact
)) == NULL
)
mpool_put(t
->bt_mp
, e
->page
, 0);
status
= __bt_ret(t
, e
, NULL
, NULL
, data
, &t
->bt_rdata
, 0);
* If the user is doing concurrent access, we copied the
* key/data, toss the page.
if (F_ISSET(t
, B_DB_LOCK
))
mpool_put(t
->bt_mp
, e
->page
, 0);