diff options
author | Ulrich Drepper <drepper@redhat.com> | 1997-08-27 20:26:10 +0000 |
---|---|---|
committer | Ulrich Drepper <drepper@redhat.com> | 1997-08-27 20:26:10 +0000 |
commit | 92f1da4da04a7a86ddee91be5eaf0b10c333ac64 (patch) | |
tree | 2a10ce9e4e407e7e5b5ca092ca0947d234b5ff60 /db2/btree/bt_page.c | |
parent | 22be878ecbc66606371bd33258f56e6711e6ba7a (diff) | |
download | glibc-92f1da4da04a7a86ddee91be5eaf0b10c333ac64.tar glibc-92f1da4da04a7a86ddee91be5eaf0b10c333ac64.tar.gz glibc-92f1da4da04a7a86ddee91be5eaf0b10c333ac64.tar.bz2 glibc-92f1da4da04a7a86ddee91be5eaf0b10c333ac64.zip |
Update.cvs/libc-ud-970827
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.
Diffstat (limited to 'db2/btree/bt_page.c')
-rw-r--r-- | db2/btree/bt_page.c | 312 |
1 files changed, 312 insertions, 0 deletions
diff --git a/db2/btree/bt_page.c b/db2/btree/bt_page.c new file mode 100644 index 0000000000..7ee74ffcf8 --- /dev/null +++ b/db2/btree/bt_page.c @@ -0,0 +1,312 @@ +/*- + * 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)); +} |