summaryrefslogtreecommitdiff
path: root/db2/btree/bt_page.c
diff options
context:
space:
mode:
authorUlrich Drepper <drepper@redhat.com>1997-08-27 20:26:10 +0000
committerUlrich Drepper <drepper@redhat.com>1997-08-27 20:26:10 +0000
commit92f1da4da04a7a86ddee91be5eaf0b10c333ac64 (patch)
tree2a10ce9e4e407e7e5b5ca092ca0947d234b5ff60 /db2/btree/bt_page.c
parent22be878ecbc66606371bd33258f56e6711e6ba7a (diff)
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.c312
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));
+}