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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1996, 1997
* Sleepycat Software. All rights reserved.
*/
/*
* Copyright (c) 1990, 1993, 1994, 1995, 1996
* Keith Bostic. All rights reserved.
*/
/*
* Copyright (c) 1990, 1993, 1994, 1995
* 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.
*/
#include "config.h"
#ifndef lint
static const char sccsid[] = "@(#)bt_close.c 10.24 (Sleepycat) 9/17/97";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#include <sys/mman.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#endif
#include "db_int.h"
#include "db_page.h"
#include "btree.h"
static void __bam_upstat __P((DB *dbp));
/*
* __bam_close --
* Close a btree.
*
* PUBLIC: int __bam_close __P((DB *));
*/
int
__bam_close(dbp)
DB *dbp;
{
BTREE *t;
DEBUG_LWRITE(dbp, NULL, "bam_close", NULL, NULL, 0);
t = dbp->internal;
/* Update tree statistics. */
__bam_upstat(dbp);
/* Free any allocated memory. */
if (t->bt_rkey.data)
FREE(t->bt_rkey.data, t->bt_rkey.size);
if (t->bt_rdata.data)
FREE(t->bt_rdata.data, t->bt_rdata.ulen);
if (t->bt_sp != t->bt_stack)
FREE(t->bt_sp, (t->bt_esp - t->bt_sp) * sizeof(EPG));
FREE(t, sizeof(BTREE));
dbp->internal = NULL;
return (0);
}
/*
* __bam_sync --
* Sync the btree to disk.
*
* PUBLIC: int __bam_sync __P((DB *, int));
*/
int
__bam_sync(argdbp, flags)
DB *argdbp;
int flags;
{
DB *dbp;
int ret;
DEBUG_LWRITE(argdbp, NULL, "bam_sync", NULL, NULL, flags);
/* Check for invalid flags. */
if ((ret = __db_syncchk(argdbp, flags)) != 0)
return (ret);
/* If it wasn't possible to modify the file, we're done. */
if (F_ISSET(argdbp, DB_AM_INMEM | DB_AM_RDONLY))
return (0);
GETHANDLE(argdbp, NULL, &dbp, ret);
/* Flush any dirty pages from the cache to the backing file. */
if ((ret = memp_fsync(dbp->mpf)) == DB_INCOMPLETE)
ret = 0;
PUTHANDLE(dbp);
return (ret);
}
/*
* __bam_upstat --
* Update tree statistics.
*/
static void
__bam_upstat(dbp)
DB *dbp;
{
BTREE *t;
BTMETA *meta;
DB_LOCK mlock;
db_pgno_t pgno;
int flags, ret;
/*
* We use a no-op log call to log the update of the statistics onto the
* metadata page. The Db->close call isn't transaction protected to
* start with, and I'm not sure what undoing a statistics update means,
* anyway.
*/
if (F_ISSET(dbp, DB_AM_INMEM | DB_AM_RDONLY))
return;
flags = 0;
pgno = PGNO_METADATA;
/* Lock and retrieve the page. */
if (__bam_lget(dbp, 0, pgno, DB_LOCK_WRITE, &mlock) != 0)
return;
if (__bam_pget(dbp, (PAGE **)&meta, &pgno, 0) == 0) {
/* Log the change. */
if (DB_LOGGING(dbp) &&
(ret = __db_noop_log(dbp->dbenv->lg_info, dbp->txn,
&LSN(meta), 0)) == 0)
goto err;
/* Update the statistics. */
t = dbp->internal;
__bam_add_mstat(&t->lstat, &meta->stat);
flags = DB_MPOOL_DIRTY;
}
err: (void)memp_fput(dbp->mpf, (PAGE *)meta, flags);
(void)__BT_LPUT(dbp, mlock);
}
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