diff options
Diffstat (limited to 'storage/bdb/xa/xa_map.c')
| -rw-r--r-- | storage/bdb/xa/xa_map.c | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/storage/bdb/xa/xa_map.c b/storage/bdb/xa/xa_map.c new file mode 100644 index 00000000000..42fa4b20ed2 --- /dev/null +++ b/storage/bdb/xa/xa_map.c @@ -0,0 +1,167 @@ +/*- + * See the file LICENSE for redistribution information. + * + * Copyright (c) 1996-2002 + * Sleepycat Software. All rights reserved. + */ + +#include "db_config.h" + +#ifndef lint +static const char revid[] = "$Id: xa_map.c,v 11.19 2002/09/03 14:58:27 sue Exp $"; +#endif /* not lint */ + +#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, envp) + int rmid; + DB_ENV **envp; +{ + DB_ENV *env; + + env = TAILQ_FIRST(&DB_GLOBAL(db_envq)); + if (env != NULL && env->xa_rmid == rmid) { + *envp = env; + 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 (; env != NULL; env = TAILQ_NEXT(env, links)) + if (env->xa_rmid == rmid) { + TAILQ_REMOVE(&DB_GLOBAL(db_envq), env, links); + TAILQ_INSERT_HEAD(&DB_GLOBAL(db_envq), env, links); + *envp = env; + 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 *, size_t *)); + */ +int +__db_xid_to_txn(dbenv, xid, offp) + DB_ENV *dbenv; + XID *xid; + size_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, env) + int rmid; + DB_ENV *env; +{ + env->xa_rmid = rmid; + TAILQ_INSERT_TAIL(&DB_GLOBAL(db_envq), env, 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(env, xid, off) + DB_ENV *env; + XID *xid; + size_t off; +{ + REGINFO *infop; + TXN_DETAIL *td; + + infop = &((DB_TXNMGR *)env->tx_handle)->reginfo; + td = (TXN_DETAIL *)R_ADDR(infop, off); + + R_LOCK(env, 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(env, 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(env, xid, off) + DB_ENV *env; + XID *xid; + size_t off; +{ + TXN_DETAIL *td; + + COMPQUIET(xid, NULL); + + td = (TXN_DETAIL *)R_ADDR(&((DB_TXNMGR *)env->tx_handle)->reginfo, off); + memset(td->xid, 0, sizeof(td->xid)); +} |