glibc/db2/btree/btree.src

/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 1996, 1997, 1998
 *	Sleepycat Software.  All rights reserved.
 *
 *	@(#)btree.src	10.8 (Sleepycat) 4/10/98
 */

PREFIX	bam

/*
 * BTREE-pg_alloc: used to record allocating a new page.
 *
 * meta_lsn:	the meta-data page's original lsn.
 * page_lsn:	the allocated page's original lsn.
 * pgno:	the page allocated.
 * next:	the next page on the free list.
 */
BEGIN pg_alloc
ARG	fileid		u_int32_t	lu
POINTER	meta_lsn	DB_LSN *	lu
POINTER	page_lsn	DB_LSN *	lu
ARG	pgno		db_pgno_t	lu
ARG	ptype		u_int32_t	lu
ARG	next		db_pgno_t	lu
END

/*
 * BTREE-pg_free: used to record freeing a page.
 *
 * pgno:	the page being freed.
 * meta_lsn:	the meta-data page's original lsn.
 * header:	the header from the free'd page.
 * next:	the previous next pointer on the metadata page.
 */
BEGIN pg_free
ARG	fileid		u_int32_t	lu
ARG	pgno		db_pgno_t	lu
POINTER	meta_lsn	DB_LSN *	lu
DBT	header		DBT		s
ARG	next		db_pgno_t	lu
END

/*
 * BTREE-split: used to log a page split.
 *
 * left:	the page number for the low-order contents.
 * llsn:	the left page's original LSN.
 * right:	the page number for the high-order contents.
 * rlsn:	the right page's original LSN.
 * indx:	the number of entries that went to the left page.
 * npgno:	the next page number
 * nlsn:	the next page's original LSN (or 0 if no next page).
 * pg:		the split page's contents before the split.
 */
BEGIN split
ARG	fileid		u_int32_t	lu
ARG	left		db_pgno_t	lu
POINTER	llsn		DB_LSN *	lu
ARG	right		db_pgno_t	lu
POINTER	rlsn		DB_LSN *	lu
ARG	indx		u_int32_t	lu
ARG	npgno		db_pgno_t	lu
POINTER	nlsn		DB_LSN *	lu
DBT	pg		DBT		s
END

/*
 * BTREE-rsplit: used to log a reverse-split
 *
 * pgno:	the page number of the page copied over the root.
 * pgdbt:	the page being copied on the root page.
 * nrec:	the tree's record count.
 * rootent:	last entry on the root page.
 * rootlsn:	the root page's original lsn.
 */
BEGIN rsplit
ARG	fileid		u_int32_t	lu
ARG	pgno		db_pgno_t	lu
DBT	pgdbt		DBT		s
ARG	nrec		db_pgno_t	lu
DBT	rootent		DBT		s
POINTER rootlsn		DB_LSN *	lu
END

/*
 * BTREE-adj: used to log the adjustment of an index.
 *
 * pgno:	the page modified.
 * lsn:		the page's original lsn.
 * indx:	the index adjusted.
 * indx_copy:	the index to copy if inserting.
 * is_insert:	0 if a delete, 1 if an insert.
 */
BEGIN adj
ARG	fileid		u_int32_t	lu
ARG	pgno		db_pgno_t	lu
POINTER	lsn		DB_LSN *	lu
ARG	indx		u_int32_t	lu
ARG	indx_copy	u_int32_t	lu
ARG	is_insert	u_int32_t	lu
END

/*
 * BTREE-cadjust: used to adjust the count change in an internal page.
 *
 * pgno:	the page modified.
 * lsn:		the page's original lsn.
 * indx:	the index to be adjusted.
 * adjust:	the signed adjustment.
 * total:	if the total tree entries count should be adjusted
 */
BEGIN cadjust
ARG	fileid		u_int32_t	lu
ARG	pgno		db_pgno_t	lu
POINTER	lsn		DB_LSN *	lu
ARG	indx		u_int32_t	lu
ARG	adjust		int32_t		ld
ARG	total		int32_t		ld
END

/*
 * BTREE-cdel: used to log the intent-to-delete of a cursor record.
 *
 * pgno:	the page modified.
 * lsn:		the page's original lsn.
 * indx:	the index to be deleted.
 */
BEGIN cdel
ARG	fileid		u_int32_t	lu
ARG	pgno		db_pgno_t	lu
POINTER	lsn		DB_LSN *	lu
ARG	indx		u_int32_t	lu
END

/*
 * BTREE-repl: used to log the replacement of an item.
 *
 * pgno:	the page modified.
 * lsn:		the page's original lsn.
 * orig:	the original data.
 * new:		the replacement data.
 * duplicate:	the prefix of the replacement that matches the original.
 */
BEGIN repl
ARG	fileid		u_int32_t	lu
ARG	pgno		db_pgno_t	lu
POINTER	lsn		DB_LSN *	lu
ARG	indx		u_int32_t	lu
ARG	isdeleted	u_int32_t	lu
DBT	orig		DBT		s
DBT	repl		DBT		s
ARG	prefix		u_int32_t	lu
ARG	suffix		u_int32_t	lu
END