mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-05 21:00:05 +00:00
71733723fb
(hurd_preempt_signals, hurd_unpreempt_signals): Decls removed. * hurd/hurd/sigpreempt.h: New file. * hurd/preempt-sig.c: Rewritten with new interface. * sysdeps/mach/hurd/jmp-unwind.c (_longjmp_unwind): Remove local signal preempters being unwound past. * db: New directory, 4.4 BSD db package incorporated from BSD db-1.85 release. * sysdeps/unix/sysv/linux/sys/param.h: Several new macros for BSD compatibility.
106 lines
3.2 KiB
C
106 lines
3.2 KiB
C
/*-
|
|
* 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
|
|
* Mike Olson.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 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
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* 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
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
static char sccsid[] = "@(#)bt_get.c 8.6 (Berkeley) 7/20/94";
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <errno.h>
|
|
#include <stddef.h>
|
|
#include <stdio.h>
|
|
|
|
#include <db.h>
|
|
#include "btree.h"
|
|
|
|
/*
|
|
* __BT_GET -- Get a record from the btree.
|
|
*
|
|
* Parameters:
|
|
* dbp: pointer to access method
|
|
* key: key to find
|
|
* data: data to return
|
|
* flag: currently unused
|
|
*
|
|
* Returns:
|
|
* RET_ERROR, RET_SUCCESS and RET_SPECIAL if the key not found.
|
|
*/
|
|
int
|
|
__bt_get(dbp, key, data, flags)
|
|
const DB *dbp;
|
|
const DBT *key;
|
|
DBT *data;
|
|
u_int flags;
|
|
{
|
|
BTREE *t;
|
|
EPG *e;
|
|
int exact, status;
|
|
|
|
t = dbp->internal;
|
|
|
|
/* Toss any page pinned across calls. */
|
|
if (t->bt_pinned != NULL) {
|
|
mpool_put(t->bt_mp, t->bt_pinned, 0);
|
|
t->bt_pinned = NULL;
|
|
}
|
|
|
|
/* Get currently doesn't take any flags. */
|
|
if (flags) {
|
|
errno = EINVAL;
|
|
return (RET_ERROR);
|
|
}
|
|
|
|
if ((e = __bt_search(t, key, &exact)) == NULL)
|
|
return (RET_ERROR);
|
|
if (!exact) {
|
|
mpool_put(t->bt_mp, e->page, 0);
|
|
return (RET_SPECIAL);
|
|
}
|
|
|
|
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);
|
|
else
|
|
t->bt_pinned = e->page;
|
|
return (status);
|
|
}
|