db_dispatch.h
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- /*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 1996-2002
- * Sleepycat Software. All rights reserved.
- */
- /*
- * Copyright (c) 1995, 1996
- * The President and Fellows of Harvard University. All rights reserved.
- *
- * 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. 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.
- *
- * $Id: db_dispatch.h,v 11.30 2002/06/20 19:34:03 margo Exp $
- */
- #ifndef _DB_DISPATCH_H_
- #define _DB_DISPATCH_H_
- /*
- * Declarations and typedefs for the list of transaction IDs used during
- * recovery. This is a generic list used to pass along whatever information
- * we need during recovery.
- */
- typedef enum {
- TXNLIST_DELETE,
- TXNLIST_LSN,
- TXNLIST_PGNO,
- TXNLIST_TXNID
- } db_txnlist_type;
- #define DB_TXNLIST_MASK(hp, n) (n % hp->nslots)
- struct __db_txnhead {
- u_int32_t maxid; /* Maximum transaction id. */
- DB_LSN maxlsn; /* Maximum commit lsn. */
- DB_LSN ckplsn; /* LSN of last retained checkpoint. */
- DB_LSN trunc_lsn; /* Lsn to which we are going to truncate;
- * make sure we abort anyone after this. */
- int32_t generation; /* Current generation number. */
- int32_t gen_alloc; /* Number of generations allocated. */
- struct {
- int32_t generation;
- u_int32_t txn_min;
- u_int32_t txn_max;
- } *gen_array; /* Array of txnids associted with a gen. */
- int nslots;
- LIST_HEAD(__db_headlink, __db_txnlist) head[1];
- };
- struct __db_txnlist {
- db_txnlist_type type;
- LIST_ENTRY(__db_txnlist) links;
- union {
- struct {
- u_int32_t txnid;
- int32_t generation;
- int32_t status;
- } t;
- struct {
- int32_t ntxns;
- int32_t maxn;
- DB_LSN *lsn_array;
- } l;
- struct {
- int32_t nentries;
- int32_t maxentry;
- int32_t locked;
- char *fname;
- int32_t fileid;
- db_pgno_t *pgno_array;
- u_int8_t uid[DB_FILE_ID_LEN];
- } p;
- } u;
- };
- /*
- * Flag value for __db_txnlist_lsnadd. Distinguish whether we are replacing
- * an entry in the transaction list or adding a new one.
- */
- #define TXNLIST_NEW 0x1
- #define DB_user_BEGIN 10000
- #endif /* !_DB_DISPATCH_H_ */