1/*-
2 * See the file LICENSE for redistribution information.
3 *
4 * Copyright (c) 1996,2008 Oracle.  All rights reserved.
5 */
6/*
7 * Copyright (c) 1995, 1996
8 *	The President and Fellows of Harvard University.  All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * $Id: db_dispatch.h,v 12.14 2008/01/08 20:58:17 bostic Exp $
35 */
36
37#ifndef _DB_DISPATCH_H_
38#define	_DB_DISPATCH_H_
39
40#if defined(__cplusplus)
41extern "C" {
42#endif
43
44/*
45 * Declarations and typedefs for the list of transaction IDs used during
46 * recovery.  This is a generic list used to pass along whatever information
47 * we need during recovery.
48 */
49typedef enum {
50	TXNLIST_DELETE,
51	TXNLIST_LSN,
52	TXNLIST_TXNID
53} db_txnlist_type;
54
55#define	DB_TXNLIST_MASK(hp, n)  (n % hp->nslots)
56struct __db_txnhead {
57	void *td;		/* If abort, the detail for the txn. */
58	DB_THREAD_INFO *thread_info;	/* Thread information. */
59	u_int32_t maxid;	/* Maximum transaction id. */
60	DB_LSN maxlsn;		/* Maximum commit lsn. */
61	DB_LSN ckplsn;		/* LSN of last retained checkpoint. */
62	DB_LSN trunc_lsn;	/* Lsn to which we are going to truncate;
63				 * make sure we abort anyone after this. */
64	u_int32_t generation;	/* Current generation number. */
65	u_int32_t gen_alloc;	/* Number of generations allocated. */
66	struct {
67		u_int32_t generation;
68		u_int32_t txn_min;
69		u_int32_t txn_max;
70	} *gen_array;		/* Array of txnids associated with a gen. */
71	u_int nslots;
72	LIST_HEAD(__db_headlink, __db_txnlist) head[1];
73};
74
75#define	DB_LSN_STACK_SIZE 4
76struct __db_txnlist {
77	db_txnlist_type type;
78	LIST_ENTRY(__db_txnlist) links;
79	union {
80		struct {
81			u_int32_t txnid;
82			u_int32_t generation;
83			u_int32_t status;
84		} t;
85		struct {
86			u_int32_t stack_size;
87			u_int32_t stack_indx;
88			DB_LSN *lsn_stack;
89		} l;
90	} u;
91};
92
93#if defined(__cplusplus)
94}
95#endif
96
97#endif /* !_DB_DISPATCH_H_ */
98