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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1996-2004
* Sleepycat Software. All rights reserved.
*
* $Id: xa_map.c,v 11.25 2004/10/15 16:59:46 bostic Exp $
*/
#include "db_config.h"
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#include <string.h>
#endif
#include "db_int.h"
#include "dbinc/txn.h"
/*
* This file contains all the mapping information that we need to support
* the DB/XA interface.
*/
/*
* __db_rmid_to_env
* Return the environment associated with a given XA rmid.
*
* PUBLIC: int __db_rmid_to_env __P((int rmid, DB_ENV **envp));
*/
int
__db_rmid_to_env(rmid, dbenvp)
int rmid;
DB_ENV **dbenvp;
{
DB_ENV *dbenv;
dbenv = TAILQ_FIRST(&DB_GLOBAL(db_envq));
if (dbenv != NULL && dbenv->xa_rmid == rmid) {
*dbenvp = dbenv;
return (0);
}
/*
* When we map an rmid, move that environment to be the first one in
* the list of environments, so we acquire the correct environment
* in DB->open.
*/
for (; dbenv != NULL; dbenv = TAILQ_NEXT(dbenv, links))
if (dbenv->xa_rmid == rmid) {
TAILQ_REMOVE(&DB_GLOBAL(db_envq), dbenv, links);
TAILQ_INSERT_HEAD(&DB_GLOBAL(db_envq), dbenv, links);
*dbenvp = dbenv;
return (0);
}
return (1);
}
/*
* __db_xid_to_txn
* Return the txn that corresponds to this XID.
*
* PUBLIC: int __db_xid_to_txn __P((DB_ENV *, XID *, roff_t *));
*/
int
__db_xid_to_txn(dbenv, xid, offp)
DB_ENV *dbenv;
XID *xid;
roff_t *offp;
{
struct __txn_detail *td;
return (__txn_map_gid(dbenv, (u_int8_t *)xid->data, &td, offp));
}
/*
* __db_map_rmid
* Create a mapping between the specified rmid and environment.
*
* PUBLIC: int __db_map_rmid __P((int, DB_ENV *));
*/
int
__db_map_rmid(rmid, dbenv)
int rmid;
DB_ENV *dbenv;
{
dbenv->xa_rmid = rmid;
TAILQ_INSERT_TAIL(&DB_GLOBAL(db_envq), dbenv, links);
return (0);
}
/*
* __db_unmap_rmid
* Destroy the mapping for the given rmid.
*
* PUBLIC: int __db_unmap_rmid __P((int));
*/
int
__db_unmap_rmid(rmid)
int rmid;
{
DB_ENV *e;
for (e = TAILQ_FIRST(&DB_GLOBAL(db_envq));
e->xa_rmid != rmid;
e = TAILQ_NEXT(e, links))
;
if (e == NULL)
return (EINVAL);
TAILQ_REMOVE(&DB_GLOBAL(db_envq), e, links);
return (0);
}
/*
* __db_map_xid
* Create a mapping between this XID and the transaction at
* "off" in the shared region.
*
* PUBLIC: int __db_map_xid __P((DB_ENV *, XID *, size_t));
*/
int
__db_map_xid(dbenv, xid, off)
DB_ENV *dbenv;
XID *xid;
size_t off;
{
REGINFO *infop;
TXN_DETAIL *td;
infop = &((DB_TXNMGR *)dbenv->tx_handle)->reginfo;
td = R_ADDR(infop, off);
R_LOCK(dbenv, infop);
memcpy(td->xid, xid->data, XIDDATASIZE);
td->bqual = (u_int32_t)xid->bqual_length;
td->gtrid = (u_int32_t)xid->gtrid_length;
td->format = (int32_t)xid->formatID;
R_UNLOCK(dbenv, infop);
return (0);
}
/*
* __db_unmap_xid
* Destroy the mapping for the specified XID.
*
* PUBLIC: void __db_unmap_xid __P((DB_ENV *, XID *, size_t));
*/
void
__db_unmap_xid(dbenv, xid, off)
DB_ENV *dbenv;
XID *xid;
size_t off;
{
TXN_DETAIL *td;
COMPQUIET(xid, NULL);
td = R_ADDR(&((DB_TXNMGR *)dbenv->tx_handle)->reginfo, off);
memset(td->xid, 0, sizeof(td->xid));
}
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