glibc/db2/btree/bt_page.c

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Update. 1997-08-10 19:17 Philip Blundell <Philip.Blundell@pobox.com> * nss/nss_db/db-XXX.c: Include <db_185.h> not <db.h>. Somebody should update this to use the new db API. * nss/nss_db/db-netgrp.c: Likewise. * nss/nss_db/db-alias.c: Likewise. * db2/Makefile: Makefile for db-2.x in glibc. 1997-08-27 21:20 Ulrich Drepper <drepper@cygnus.com> * csu/Makefile (before-compile): New goal. Make sure abi-tag.h is generated. [$(elf)=yes] (asm-CPPFLAGS): Make sure abi-tag.h file can be found. * Makeconfig [$(build-omitfp)=yes] (CFLAGS-.o): Add -D__USE_STRING_INLINES. * string/string.f: Move strnlen optimization after inclusion of <bits/string.h>. Include <bits/string.h> only if __USE_STRING_INLINES is defined. * sysdeps/generic/memcpy.c: Undef memcpy to allow macro of this name in <bits/string.h>. * sysdeps/generic/memset.c: Likewise. * sysdeps/i386/string.h: i386 optimized string functions. * sysdeps/i386/i486string.h: i486+ optimized string functions. * Makefile (subdirs): Change db to db2. * shlib-versions: Bump libdb verion number to 3. * include/db.h: Include from db2 directory. * include/db_185.h: New file. * sysdeps/i386/Makefile [$(subdirs)=db2] (CPPFLAGS): Add macros to provide spinlock information for db2. * sysdeps/m68k/m68020/Makefile: New file. Likewise. * sysdeps/sparc/Makefile: New file. Likewise. * sysdeps/unix/sysv/linux/Makefile [$(subdirs)=db2] (CPPFLAGS): Add -DHAVE_LLSEEK. * db2/config.h: Hand-edited config file for db2 in glibc. * db2/compat.h: New file from db-2.3.4. * db2/db.h: Likewise. * db2/db_185.h: Likewise. * db2/db_int.h: Likewise. * db2/makedb.c: Likewise. * db2/btree/bt_close.c: Likewise. * db2/btree/bt_compare.c: Likewise. * db2/btree/bt_conv.c: Likewise. * db2/btree/bt_cursor.c: Likewise. * db2/btree/bt_delete.c: Likewise. * db2/btree/bt_open.c: Likewise. * db2/btree/bt_page.c: Likewise. * db2/btree/bt_put.c: Likewise. * db2/btree/bt_rec.c: Likewise. * db2/btree/bt_recno.c: Likewise. * db2/btree/btree_auto.c: Likewise. * db2/btree/bt_rsearch.c: Likewise. * db2/btree/bt_search.c: Likewise. * db2/btree/bt_split.c: Likewise. * db2/btree/bt_stat.c: Likewise. * db2/btree/btree.src: Likewise. * db2/common/db_appinit.c: Likewise. * db2/common/db_err.c: Likewise. * db2/common/db_byteorder.c: Likewise. * db2/common/db_apprec.c: Likewise. * db2/common/db_salloc.c: Likewise. * db2/common/db_log2.c: Likewise. * db2/common/db_region.c: Likewise. * db2/common/db_shash.c: Likewise. * db2/db/db.c: Likewise. * db2/db/db.src: Likewise. * db2/db/db_conv.c: Likewise. * db2/db/db_dispatch.c: Likewise. * db2/db/db_dup.c: Likewise. * db2/db/db_overflow.c: Likewise. * db2/db/db_pr.c: Likewise. * db2/db/db_rec.c: Likewise. * db2/db/db_ret.c: Likewise. * db2/db/db_thread.c: Likewise. * db2/db/db_auto.c: Likewise. * db2/db185/db185.c: Likewise. * db2/db185/db185_int.h: Likewise. * db2/dbm/dbm.c: Likewise. * db2/hash/hash.c: Likewise. * db2/hash/hash.src: Likewise. * db2/hash/hash_page.c: Likewise. * db2/hash/hash_conv.c: Likewise. * db2/hash/hash_debug.c: Likewise. * db2/hash/hash_stat.c: Likewise. * db2/hash/hash_rec.c: Likewise. * db2/hash/hash_dup.c: Likewise. * db2/hash/hash_func.c: Likewise. * db2/hash/hash_auto.c: Likewise. * db2/include/mp.h: Likewise. * db2/include/btree.h: Likewise. * db2/include/db.h.src: Likewise. * db2/include/db_int.h.src: Likewise. * db2/include/db_shash.h: Likewise. * db2/include/db_swap.h: Likewise. * db2/include/db_185.h.src: Likewise. * db2/include/txn.h: Likewise. * db2/include/db_am.h: Likewise. * db2/include/shqueue.h: Likewise. * db2/include/hash.h: Likewise. * db2/include/db_dispatch.h: Likewise. * db2/include/lock.h: Likewise. * db2/include/db_page.h: Likewise. * db2/include/log.h: Likewise. * db2/include/db_auto.h: Likewise. * db2/include/btree_auto.h: Likewise. * db2/include/hash_auto.h: Likewise. * db2/include/log_auto.h: Likewise. * db2/include/txn_auto.h: Likewise. * db2/include/db_ext.h: Likewise. * db2/include/btree_ext.h: Likewise. * db2/include/clib_ext.h: Likewise. * db2/include/common_ext.h: Likewise. * db2/include/hash_ext.h: Likewise. * db2/include/lock_ext.h: Likewise. * db2/include/log_ext.h: Likewise. * db2/include/mp_ext.h: Likewise. * db2/include/mutex_ext.h: Likewise. * db2/include/os_ext.h: Likewise. * db2/include/txn_ext.h: Likewise. * db2/include/cxx_int.h: Likewise. * db2/include/db_cxx.h: Likewise. * db2/include/queue.h: Likewise. * db2/lock/lock.c: Likewise. * db2/lock/lock_conflict.c: Likewise. * db2/lock/lock_util.c: Likewise. * db2/lock/lock_deadlock.c: Likewise. * db2/log/log.c: Likewise. * db2/log/log_get.c: Likewise. * db2/log/log.src: Likewise. * db2/log/log_compare.c: Likewise. * db2/log/log_put.c: Likewise. * db2/log/log_rec.c: Likewise. * db2/log/log_archive.c: Likewise. * db2/log/log_register.c: Likewise. * db2/log/log_auto.c: Likewise. * db2/log/log_findckp.c: Likewise. * db2/mp/mp_bh.c: Likewise. * db2/mp/mp_fget.c: Likewise. * db2/mp/mp_fopen.c: Likewise. * db2/mp/mp_fput.c: Likewise. * db2/mp/mp_fset.c: Likewise. * db2/mp/mp_open.c: Likewise. * db2/mp/mp_region.c: Likewise. * db2/mp/mp_pr.c: Likewise. * db2/mp/mp_sync.c: Likewise. * db2/mutex/68020.gcc: Likewise. * db2/mutex/mutex.c: Likewise. * db2/mutex/README: Likewise. * db2/mutex/x86.gcc: Likewise. * db2/mutex/sparc.gcc: Likewise. * db2/mutex/uts4.cc.s: Likewise. * db2/mutex/alpha.dec: Likewise. * db2/mutex/alpha.gcc: Likewise. * db2/mutex/parisc.gcc: Likewise. * db2/mutex/parisc.hp: Likewise. * db2/os/db_os_abs.c: Likewise. * db2/os/db_os_dir.c: Likewise. * db2/os/db_os_fid.c: Likewise. * db2/os/db_os_lseek.c: Likewise. * db2/os/db_os_mmap.c: Likewise. * db2/os/db_os_open.c: Likewise. * db2/os/db_os_rw.c: Likewise. * db2/os/db_os_sleep.c: Likewise. * db2/os/db_os_stat.c: Likewise. * db2/os/db_os_unlink.c: Likewise. * db2/txn/txn.c: Likewise. * db2/txn/txn.src: Likewise. * db2/txn/txn_rec.c: Likewise. * db2/txn/txn_auto.c: Likewise. * db2/clib/getlong.c: Likewise. * db2/progs/db_archive/db_archive.c: Likewise. * db2/progs/db_checkpoint/db_checkpoint.c: Likewise. * db2/progs/db_deadlock/db_deadlock.c: Likewise. * db2/progs/db_dump/db_dump.c: Likewise. * db2/progs/db_dump185/db_dump185.c: Likewise. * db2/progs/db_load/db_load.c: Likewise. * db2/progs/db_printlog/db_printlog.c: Likewise. * db2/progs/db_recover/db_recover.c: Likewise. * db2/progs/db_stat/db_stat.c: Likewise. * libio/stdio.h [__cplusplus] (__STDIO_INLINE): Define as inline. * po/de.po, po/sv.po: Update from 2.0.5 translations. * sysdeps/unix/sysv/linux/netinet/tcp.h: Pretty print. * sunrpc/rpc/xdr.h (XDR): Don't define argument of x_destroy callback as const. * sunrpc/xdr_mem.c (xdrmem_destroy): Don't define argument as const. * sunrpx/xdr_rec.c (xdrrec_destroy): Likewise. * sunrpx/xdr_stdio.c (xdrstdio_destroy): Likewise. 1997-08-27 18:47 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/if_index.c: Include <errno.h>. Reported by Benjamin Kosnik <bkoz@cygnus.com>. 1997-08-27 02:27 Roland McGrath <roland@baalperazim.frob.com> * abi-tags: New file. * csu/Makefile (distribute): Remove abi-tag.h. ($(objpfx)abi-tag.h): New target. * Makefile (distribute): Add abi-tags. * sysdeps/unix/sysv/linux/abi-tag.h: File removed. * sysdeps/mach/hurd/abi-tag.h: File removed. * sysdeps/stub/abi-tag.h: File removed. 1997-08-25 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/unix/make-syscalls.sh: Change output so that it generates compilation rules only for the currently selected object suffixes. 1997-08-25 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/m68k/dl-machine.h (RTLD_START): Switch back to previous section to avoid confusing the compiler. * sysdeps/alpha/dl-machine.h (RTLD_START): Likewise. * sysdeps/i386/dl-machine.h (RTLD_START): Likewise. * sysdeps/mips/dl-machine.h (RTLD_START): Likewise. * sysdeps/mips/mips64/dl-machine.h (RTLD_START): Likewise. * sysdeps/sparc/sparc32/dl-machine.h (RTLD_START): Likewise. * sysdeps/m68k/dl-machine.h (elf_machine_load_address): Use a GOT relocation instead of a constant to avoid text relocation. (ELF_MACHINE_BEFORE_RTLD_RELOC): Removed. (RTLD_START): Declare global labels as functions and add size directive. 1997-08-25 17:01 Ulrich Drepper <drepper@cygnus.com> * sysdeps/i386/bits/select.h: Correct assembler versions to work even for descriptors >= 32. * stdlib/alloca.h: Don't define alloca to __alloca since if gcc is used __alloca is not defined to __builtin_alloca and so might not be available. Reported by Uwe Ohse <uwe@ohse.de>. * sysdeps/unix/sysv/linux/sys/sysmacros.h: Define macros in a special way if gcc is not used and so dev_t is an array. Reported by Uwe Ohse <uwe@ohse.de>. 1997-08-23 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * manual/libc.texinfo: Reorder chapters to match logical order. 1997-08-25 12:22 Ulrich Drepper <drepper@cygnus.com> * sunrpc/rpc/xdr.h: Change name of parameters in prototypes of xdr_reference, xdrmem_create, and xdrstdio_create because of clash with g++ internal symbols. Patch by Sudish Joseph <sj@eng.mindspring.net>. * elf/dl-deps.c: Implement handling of DT_FILTER.
1997-08-27 20:26:10 +00:00
/*-
* 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_page.c 10.5 (Sleepycat) 8/18/97";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#include <errno.h>
#include <stdio.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((DB *, u_int32_t, PAGE **));
*/
int
__bam_new(dbp, type, pagepp)
DB *dbp;
u_int32_t type;
PAGE **pagepp;
{
BTMETA *meta;
DB_LOCK mlock;
PAGE *h;
db_pgno_t pgno;
int ret;
meta = NULL;
h = NULL;
mlock = LOCK_INVALID;
pgno = PGNO_METADATA;
if ((ret = __bam_lget(dbp, 0, pgno, DB_LOCK_WRITE, &mlock)) != 0)
goto err;
if ((ret = __bam_pget(dbp, (PAGE **)&meta, &pgno, 0)) != 0)
goto err;
if (meta->free == PGNO_INVALID) {
if ((ret = __bam_pget(dbp, &h, &pgno, DB_MPOOL_NEW)) != 0)
goto err;
ZERO_LSN(h->lsn);
h->pgno = pgno;
} else {
pgno = meta->free;
if ((ret = __bam_pget(dbp, &h, &pgno, 0)) != 0)
goto err;
meta->free = h->next_pgno;
}
/* Log the change. */
if (DB_LOGGING(dbp)) {
if ((ret = __bam_pg_alloc_log(dbp->dbenv->lg_info, dbp->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(dbp, mlock);
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 (mlock != LOCK_INVALID)
(void)__BT_TLPUT(dbp, mlock);
return (ret);
}
/*
* __bam_free --
* Add a page to the head of the freelist.
*
* PUBLIC: int __bam_free __P((DB *, PAGE *));
*/
int
__bam_free(dbp, h)
DB *dbp;
PAGE *h;
{
BTMETA *meta;
DBT ldbt;
DB_LOCK mlock;
db_pgno_t pgno;
int is_dirty, ret, t_ret;
/*
* 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.
*/
is_dirty = 0;
pgno = PGNO_METADATA;
if ((ret = __bam_lget(dbp, 0, pgno, DB_LOCK_WRITE, &mlock)) != 0)
goto err;
if ((ret = __bam_pget(dbp, (PAGE **)&meta, &pgno, 0)) != 0) {
(void)__BT_TLPUT(dbp, mlock);
goto err;
}
/* Log the change. */
if (DB_LOGGING(dbp)) {
memset(&ldbt, 0, sizeof(ldbt));
ldbt.data = h;
ldbt.size = P_OVERHEAD;
if ((ret = __bam_pg_free_log(dbp->dbenv->lg_info,
dbp->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(dbp, mlock);
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 DEBUG
{ db_pgno_t __pgno; DB_LSN __lsn;
__pgno = h->pgno;
__lsn = h->lsn;
memset(h, 0xff, 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(dbp, mlock)) != 0)
ret = t_ret;
/* Discard the caller's page reference. */
is_dirty = DB_MPOOL_DIRTY;
err: if ((t_ret = memp_fput(dbp->mpf, h, is_dirty)) != 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 currently held locks.
*/
int
__bam_lt(dbp)
DB *dbp;
{
DB_LOCKREQ req;
if (F_ISSET(dbp, DB_AM_LOCKING)) {
req.op = DB_LOCK_DUMP;
lock_vec(dbp->dbenv->lk_info, dbp->locker, 0, &req, 1, NULL);
}
return (0);
}
#endif
/*
* __bam_lget --
* The standard lock get call.
*
* PUBLIC: int __bam_lget __P((DB *, int, db_pgno_t, db_lockmode_t, DB_LOCK *));
*/
int
__bam_lget(dbp, do_couple, pgno, mode, lockp)
DB *dbp;
int do_couple;
db_pgno_t pgno;
db_lockmode_t mode;
DB_LOCK *lockp;
{
DB_LOCKREQ couple[2];
u_int32_t locker;
int ret;
if (!F_ISSET(dbp, DB_AM_LOCKING))
return (0);
locker = dbp->txn == NULL ? dbp->locker : dbp->txn->txnid;
dbp->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 = &dbp->lock_dbt;
couple[0].mode = mode;
couple[1].op = DB_LOCK_PUT;
couple[1].lock = *lockp;
ret = lock_vec(dbp->dbenv->lk_info, locker, 0, couple, 2, NULL);
if (ret != 0) {
/* If we fail, discard the lock we held. */
__bam_lput(dbp, *lockp);
return (ret < 0 ? EAGAIN : ret);
}
*lockp = couple[0].lock;
} else {
ret = lock_get(dbp->dbenv->lk_info,
locker, 0, &dbp->lock_dbt, mode, lockp);
return (ret < 0 ? EAGAIN : ret);
}
return (0);
}
/*
* __bam_lput --
* The standard lock put call.
*
* PUBLIC: int __bam_lput __P((DB *, DB_LOCK));
*/
int
__bam_lput(dbp, lock)
DB *dbp;
DB_LOCK lock;
{
return (__BT_LPUT(dbp, lock));
}
/*
* __bam_pget --
* The standard page get call.
*
* PUBLIC: int __bam_pget __P((DB *, PAGE **, db_pgno_t *, int));
*/
int
__bam_pget(dbp, hp, pgnop, mflags)
DB *dbp;
PAGE **hp;
db_pgno_t *pgnop;
int mflags;
{
return (memp_fget((dbp)->mpf,
pgnop, mflags, hp) == 0 ? 0 : __db_pgerr(dbp, *pgnop));
}