/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1996, 1997, 1998
* Sleepycat Software. All rights reserved.
*/
/*
* Copyright (c) 1995, 1996
* The President and Fellows of Harvard University. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Margo Seltzer.
*
* 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
* 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
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
#include <errno.h>
#include <shqueue.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#endif
#include "db_int.h"
#include "db_page.h"
#include "db_dispatch.h"
#include "db_am.h"
#include "common_ext.h"
#include "log_auto.h"
#include "txn.h"
#include "txn_auto.h"
/*
* Data structures to manage the DB dispatch table. The dispatch table
* is a dynamically allocated array of pointers to dispatch functions.
* The dispatch_size is the number of entries possible in the current
* dispatch table and the dispatch_valid is the number of valid entries
* in the dispatch table.
*/
/*
* __db_dispatch --
*
* This is the transaction dispatch function used by the db access methods.
* It is designed to handle the record format used by all the access
* methods (the one automatically generated by the db_{h,log,read}.sh
* scripts in the tools directory). An application using a different
* recovery paradigm will supply a different dispatch function to txn_open.
*
* PUBLIC: int __db_dispatch __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
*/
int
int redo; /* Redo this op (or undo it). */
void *info;
{
switch (redo) {
case TXN_REDO:
case TXN_UNDO:
case TXN_OPENFILES:
if (rectype < DB_txn_BEGIN )
break;
case TXN_BACKWARD_ROLL:
/*
* Running full recovery in the backward pass. If we've
* seen this txnid before and added to it our commit list,
* then we do nothing during this pass. If we've never
* seen it, then we call the appropriate recovery routine
* in "abort mode".
*/
txnid != 0))
break;
case TXN_FORWARD_ROLL:
/*
* In the forward pass, if we haven't seen the transaction,
* do nothing, else recovery it.
*/
break;
default:
abort();
}
return (0);
}
/*
* __db_add_recovery --
*
* PUBLIC: int __db_add_recovery __P((DB_ENV *,
* PUBLIC: int (*)(DB_LOG *, DBT *, DB_LSN *, int, void *), u_int32_t));
*/
int
{
u_int32_t i;
int ret;
/* Check if we have to grow the table. */
if (ndx >= dispatch_size) {
(DB_user_BEGIN + dispatch_size) *
sizeof(dispatch_table[0]))) != 0)
return (ret);
for (i = dispatch_size,
dispatch_table[i] = NULL;
}
return (0);
}
/*
* __db_txnlist_init --
* Initialize transaction linked list.
*
* PUBLIC: int __db_txnlist_init __P((void *));
*/
int
void *retp;
{
int ret;
return (ret);
return (0);
}
/*
* __db_txnlist_add --
* Add an element to our transaction linked list.
*
* PUBLIC: int __db_txnlist_add __P((void *, u_int32_t));
*/
int
void *listp;
{
int ret;
return (ret);
return (0);
}
/*
* __db_txnlist_find --
* Checks to see if a txnid with the current generation is in the
* txnid list.
*
* PUBLIC: int __db_txnlist_find __P((void *, u_int32_t));
*/
int
void *listp;
{
DB_TXNLIST *p;
return (DB_NOTFOUND);
return (0);
return (DB_NOTFOUND);
}
/*
* __db_txnlist_end --
* Discard transaction linked list.
*
* PUBLIC: void __db_txnlist_end __P((void *));
*/
void
void *listp;
{
DB_TXNLIST *p;
LIST_REMOVE(p, links);
__os_free(p, 0);
}
}
/*
* __db_txnlist_gen --
* Change the current generation number.
*
* PUBLIC: void __db_txnlist_gen __P((void *, int));
*/
void
void *listp;
int incr;
{
/*
* During recovery generation numbers keep track of how many "restart"
* checkpoints we've seen. Restart checkpoints occur whenever we take
* a checkpoint and there are no outstanding transactions. When that
* happens, we can reset transaction IDs back to 1. It always happens
* at recovery and it prevents us from exhausting the transaction IDs
* name space.
*/
}
#ifdef DEBUG
/*
* __db_txnlist_print --
* Print out the transaction list.
*
* PUBLIC: void __db_txnlist_print __P((void *));
*/
void
void *listp;
{
DB_TXNLIST *p;
(u_long)p->generation);
}
#endif