aboutsummaryrefslogtreecommitdiff
path: root/db2/btree/bt_page.c
diff options
context:
space:
mode:
Diffstat (limited to 'db2/btree/bt_page.c')
-rw-r--r--db2/btree/bt_page.c317
1 files changed, 0 insertions, 317 deletions
diff --git a/db2/btree/bt_page.c b/db2/btree/bt_page.c
deleted file mode 100644
index 6ccd68a5ab..0000000000
--- a/db2/btree/bt_page.c
+++ /dev/null
@@ -1,317 +0,0 @@
-/*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 1996, 1997, 1998
- * 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_page.c 10.17 (Sleepycat) 1/3/99";
-#endif /* not lint */
-
-#ifndef NO_SYSTEM_INCLUDES
-#include <sys/types.h>
-
-#include <errno.h>
-#include <string.h>
-#endif
-
-#include "db_int.h"
-#include "db_page.h"
-#include "btree.h"
-
-/*
- * __bam_new --
- * Get a new page, preferably from the freelist.
- *
- * PUBLIC: int __bam_new __P((DBC *, u_int32_t, PAGE **));
- */
-int
-__bam_new(dbc, type, pagepp)
- DBC *dbc;
- u_int32_t type;
- PAGE **pagepp;
-{
- BTMETA *meta;
- DB *dbp;
- DB_LOCK metalock;
- PAGE *h;
- db_pgno_t pgno;
- int ret;
-
- dbp = dbc->dbp;
- meta = NULL;
- h = NULL;
- metalock = LOCK_INVALID;
-
- pgno = PGNO_METADATA;
- if ((ret = __bam_lget(dbc, 0, pgno, DB_LOCK_WRITE, &metalock)) != 0)
- goto err;
- if ((ret = memp_fget(dbp->mpf, &pgno, 0, (PAGE **)&meta)) != 0)
- goto err;
-
- if (meta->free == PGNO_INVALID) {
- if ((ret = memp_fget(dbp->mpf, &pgno, DB_MPOOL_NEW, &h)) != 0)
- goto err;
- ZERO_LSN(h->lsn);
- h->pgno = pgno;
- } else {
- pgno = meta->free;
- if ((ret = memp_fget(dbp->mpf, &pgno, 0, &h)) != 0)
- goto err;
- meta->free = h->next_pgno;
- }
-
- /* Log the change. */
- if (DB_LOGGING(dbc)) {
- if ((ret = __bam_pg_alloc_log(dbp->dbenv->lg_info, dbc->txn,
- &meta->lsn, 0, dbp->log_fileid, &meta->lsn, &h->lsn,
- h->pgno, (u_int32_t)type, meta->free)) != 0)
- goto err;
- LSN(h) = LSN(meta);
- }
-
- (void)memp_fput(dbp->mpf, (PAGE *)meta, DB_MPOOL_DIRTY);
- (void)__BT_TLPUT(dbc, metalock);
-
- P_INIT(h, dbp->pgsize, h->pgno, PGNO_INVALID, PGNO_INVALID, 0, type);
- *pagepp = h;
- return (0);
-
-err: if (h != NULL)
- (void)memp_fput(dbp->mpf, h, 0);
- if (meta != NULL)
- (void)memp_fput(dbp->mpf, meta, 0);
- if (metalock != LOCK_INVALID)
- (void)__BT_TLPUT(dbc, metalock);
- return (ret);
-}
-
-/*
- * __bam_lput --
- * The standard lock put call.
- *
- * PUBLIC: int __bam_lput __P((DBC *, DB_LOCK));
- */
-int
-__bam_lput(dbc, lock)
- DBC *dbc;
- DB_LOCK lock;
-{
- return (__BT_LPUT(dbc, lock));
-}
-
-/*
- * __bam_free --
- * Add a page to the head of the freelist.
- *
- * PUBLIC: int __bam_free __P((DBC *, PAGE *));
- */
-int
-__bam_free(dbc, h)
- DBC *dbc;
- PAGE *h;
-{
- BTMETA *meta;
- DB *dbp;
- DBT ldbt;
- DB_LOCK metalock;
- db_pgno_t pgno;
- u_int32_t dirty_flag;
- int ret, t_ret;
-
- dbp = dbc->dbp;
-
- /*
- * Retrieve the metadata page and insert the page at the head of
- * the free list. If either the lock get or page get routines
- * fail, then we need to put the page with which we were called
- * back because our caller assumes we take care of it.
- */
- dirty_flag = 0;
- pgno = PGNO_METADATA;
- if ((ret = __bam_lget(dbc, 0, pgno, DB_LOCK_WRITE, &metalock)) != 0)
- goto err;
- if ((ret = memp_fget(dbp->mpf, &pgno, 0, (PAGE **)&meta)) != 0) {
- (void)__BT_TLPUT(dbc, metalock);
- goto err;
- }
-
- /* Log the change. */
- if (DB_LOGGING(dbc)) {
- memset(&ldbt, 0, sizeof(ldbt));
- ldbt.data = h;
- ldbt.size = P_OVERHEAD;
- if ((ret = __bam_pg_free_log(dbp->dbenv->lg_info,
- dbc->txn, &meta->lsn, 0, dbp->log_fileid, h->pgno,
- &meta->lsn, &ldbt, meta->free)) != 0) {
- (void)memp_fput(dbp->mpf, (PAGE *)meta, 0);
- (void)__BT_TLPUT(dbc, metalock);
- return (ret);
- }
- LSN(h) = LSN(meta);
- }
-
- /*
- * The page should have nothing interesting on it, re-initialize it,
- * leaving only the page number and the LSN.
- */
-#ifdef DIAGNOSTIC
- { db_pgno_t __pgno; DB_LSN __lsn;
- __pgno = h->pgno;
- __lsn = h->lsn;
- memset(h, 0xdb, dbp->pgsize);
- h->pgno = __pgno;
- h->lsn = __lsn;
- }
-#endif
- P_INIT(h, dbp->pgsize, h->pgno, PGNO_INVALID, meta->free, 0, P_INVALID);
-
- /* Link the page on the metadata free list. */
- meta->free = h->pgno;
-
- /* Discard the metadata page. */
- ret = memp_fput(dbp->mpf, (PAGE *)meta, DB_MPOOL_DIRTY);
- if ((t_ret = __BT_TLPUT(dbc, metalock)) != 0)
- ret = t_ret;
-
- /* Discard the caller's page reference. */
- dirty_flag = DB_MPOOL_DIRTY;
-err: if ((t_ret = memp_fput(dbp->mpf, h, dirty_flag)) != 0 && ret == 0)
- ret = t_ret;
-
- /*
- * XXX
- * We have to unlock the caller's page in the caller!
- */
- return (ret);
-}
-
-#ifdef DEBUG
-/*
- * __bam_lt --
- * Print out the list of locks currently held by a cursor.
- *
- * PUBLIC: int __bam_lt __P((DBC *));
- */
-int
-__bam_lt(dbc)
- DBC *dbc;
-{
- DB *dbp;
- DB_LOCKREQ req;
-
- dbp = dbc->dbp;
- if (F_ISSET(dbp, DB_AM_LOCKING)) {
- req.op = DB_LOCK_DUMP;
- lock_vec(dbp->dbenv->lk_info, dbc->locker, 0, &req, 1, NULL);
- }
- return (0);
-}
-#endif
-
-/*
- * __bam_lget --
- * The standard lock get call.
- *
- * PUBLIC: int __bam_lget
- * PUBLIC: __P((DBC *, int, db_pgno_t, db_lockmode_t, DB_LOCK *));
- */
-int
-__bam_lget(dbc, do_couple, pgno, mode, lockp)
- DBC *dbc;
- int do_couple;
- db_pgno_t pgno;
- db_lockmode_t mode;
- DB_LOCK *lockp;
-{
- DB *dbp;
- DB_LOCKREQ couple[2];
- int ret;
-
- dbp = dbc->dbp;
-
- if (!F_ISSET(dbp, DB_AM_LOCKING)) {
- *lockp = LOCK_INVALID;
- return (0);
- }
-
- dbc->lock.pgno = pgno;
-
- /*
- * If the object not currently locked, acquire the lock and return,
- * otherwise, lock couple. If we fail and it's not a system error,
- * convert to EAGAIN.
- */
- if (do_couple) {
- couple[0].op = DB_LOCK_GET;
- couple[0].obj = &dbc->lock_dbt;
- couple[0].mode = mode;
- couple[1].op = DB_LOCK_PUT;
- couple[1].lock = *lockp;
-
- if (dbc->txn == NULL)
- ret = lock_vec(dbp->dbenv->lk_info,
- dbc->locker, 0, couple, 2, NULL);
- else
- ret = lock_tvec(dbp->dbenv->lk_info,
- dbc->txn, 0, couple, 2, NULL);
- if (ret != 0) {
- /* If we fail, discard the lock we held. */
- __BT_LPUT(dbc, *lockp);
-
- return (ret < 0 ? EAGAIN : ret);
- }
- *lockp = couple[0].lock;
- } else {
- if (dbc->txn == NULL)
- ret = lock_get(dbp->dbenv->lk_info,
- dbc->locker, 0, &dbc->lock_dbt, mode, lockp);
- else
- ret = lock_tget(dbp->dbenv->lk_info,
- dbc->txn, 0, &dbc->lock_dbt, mode, lockp);
- return (ret < 0 ? EAGAIN : ret);
- }
- return (0);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-14 11:18:03 +0000