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167 lines
3.1 KiB
C
167 lines
3.1 KiB
C
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1996-2002
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* Sleepycat Software. All rights reserved.
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*/
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#include "db_config.h"
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#ifndef lint
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static const char revid[] = "$Id: xa_map.c,v 11.19 2002/09/03 14:58:27 sue Exp $";
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#endif /* not lint */
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#ifndef NO_SYSTEM_INCLUDES
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#include <sys/types.h>
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#include <string.h>
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#endif
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#include "db_int.h"
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#include "dbinc/txn.h"
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/*
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* This file contains all the mapping information that we need to support
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* the DB/XA interface.
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*/
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/*
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* __db_rmid_to_env
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* Return the environment associated with a given XA rmid.
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*
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* PUBLIC: int __db_rmid_to_env __P((int rmid, DB_ENV **envp));
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*/
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int
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__db_rmid_to_env(rmid, envp)
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int rmid;
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DB_ENV **envp;
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{
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DB_ENV *env;
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env = TAILQ_FIRST(&DB_GLOBAL(db_envq));
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if (env != NULL && env->xa_rmid == rmid) {
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*envp = env;
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return (0);
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}
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/*
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* When we map an rmid, move that environment to be the first one in
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* the list of environments, so we acquire the correct environment
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* in DB->open.
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*/
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for (; env != NULL; env = TAILQ_NEXT(env, links))
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if (env->xa_rmid == rmid) {
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TAILQ_REMOVE(&DB_GLOBAL(db_envq), env, links);
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TAILQ_INSERT_HEAD(&DB_GLOBAL(db_envq), env, links);
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*envp = env;
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return (0);
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}
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return (1);
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}
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/*
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* __db_xid_to_txn
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* Return the txn that corresponds to this XID.
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*
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* PUBLIC: int __db_xid_to_txn __P((DB_ENV *, XID *, size_t *));
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*/
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int
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__db_xid_to_txn(dbenv, xid, offp)
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DB_ENV *dbenv;
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XID *xid;
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size_t *offp;
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{
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struct __txn_detail *td;
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return (__txn_map_gid(dbenv, (u_int8_t *)xid->data, &td, offp));
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}
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/*
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* __db_map_rmid
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* Create a mapping between the specified rmid and environment.
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*
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* PUBLIC: int __db_map_rmid __P((int, DB_ENV *));
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*/
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int
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__db_map_rmid(rmid, env)
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int rmid;
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DB_ENV *env;
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{
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env->xa_rmid = rmid;
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TAILQ_INSERT_TAIL(&DB_GLOBAL(db_envq), env, links);
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return (0);
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}
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/*
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* __db_unmap_rmid
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* Destroy the mapping for the given rmid.
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*
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* PUBLIC: int __db_unmap_rmid __P((int));
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*/
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int
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__db_unmap_rmid(rmid)
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int rmid;
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{
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DB_ENV *e;
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for (e = TAILQ_FIRST(&DB_GLOBAL(db_envq));
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e->xa_rmid != rmid;
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e = TAILQ_NEXT(e, links));
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if (e == NULL)
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return (EINVAL);
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TAILQ_REMOVE(&DB_GLOBAL(db_envq), e, links);
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return (0);
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}
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/*
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* __db_map_xid
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* Create a mapping between this XID and the transaction at
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* "off" in the shared region.
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*
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* PUBLIC: int __db_map_xid __P((DB_ENV *, XID *, size_t));
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*/
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int
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__db_map_xid(env, xid, off)
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DB_ENV *env;
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XID *xid;
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size_t off;
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{
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REGINFO *infop;
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TXN_DETAIL *td;
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infop = &((DB_TXNMGR *)env->tx_handle)->reginfo;
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td = (TXN_DETAIL *)R_ADDR(infop, off);
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R_LOCK(env, infop);
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memcpy(td->xid, xid->data, XIDDATASIZE);
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td->bqual = (u_int32_t)xid->bqual_length;
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td->gtrid = (u_int32_t)xid->gtrid_length;
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td->format = (int32_t)xid->formatID;
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R_UNLOCK(env, infop);
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return (0);
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}
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/*
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* __db_unmap_xid
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* Destroy the mapping for the specified XID.
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*
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* PUBLIC: void __db_unmap_xid __P((DB_ENV *, XID *, size_t));
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*/
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void
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__db_unmap_xid(env, xid, off)
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DB_ENV *env;
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XID *xid;
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size_t off;
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{
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TXN_DETAIL *td;
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COMPQUIET(xid, NULL);
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td = (TXN_DETAIL *)R_ADDR(&((DB_TXNMGR *)env->tx_handle)->reginfo, off);
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memset(td->xid, 0, sizeof(td->xid));
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}
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