diff options
Diffstat (limited to 'storage/bdb/dbinc/db_dispatch.h')
| -rw-r--r-- | storage/bdb/dbinc/db_dispatch.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/storage/bdb/dbinc/db_dispatch.h b/storage/bdb/dbinc/db_dispatch.h new file mode 100644 index 00000000000..283eb1e95de --- /dev/null +++ b/storage/bdb/dbinc/db_dispatch.h @@ -0,0 +1,105 @@ +/*- + * 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_ */ |