Cleanup: Drop !mt_dbxs hack, use MDB_TXN_FINISHED

diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index ec34cfec50b55d682b00994c6c0b0b2365a87aba..b67bf09becbf9acd8b4f7047f25fc31598c90b3a 100644 (file)
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -2695,7 +2695,7 @@ mdb_txn_renew0(MDB_txn *txn)
                        txn->mt_u.reader = r;
                        meta = env->me_metas[txn->mt_txnid & 1];
                }
-               txn->mt_dbxs = env->me_dbxs;    /* mostly static anyway */
+
        } else {
                /* Not yet touching txn == env->me_txn0, it may be active */
                if (ti) {
@@ -2756,7 +2756,7 @@ mdb_txn_renew(MDB_txn *txn)
 {
        int rc;
 
-       if (!txn || txn->mt_dbxs)       /* A reset txn has mt_dbxs==NULL */
+       if (!txn || !F_ISSET(txn->mt_flags, MDB_TXN_RDONLY|MDB_TXN_FINISHED))
                return EINVAL;
 
        if (txn->mt_env->me_flags & MDB_FATAL_ERROR) {
@@ -2813,6 +2813,7 @@ mdb_txn_begin(MDB_env *env, MDB_txn *parent, unsigned int flags, MDB_txn **ret)
                DPRINTF(("calloc: %s", strerror(errno)));
                return ENOMEM;
        }
+       txn->mt_dbxs = env->me_dbxs;    /* static */
        txn->mt_dbs = (MDB_db *) ((char *)txn + tsize);
        txn->mt_dbflags = (unsigned char *)txn + size - env->me_maxdbs;
        txn->mt_flags = flags;
@@ -2839,7 +2840,6 @@ mdb_txn_begin(MDB_env *env, MDB_txn *parent, unsigned int flags, MDB_txn **ret)
                parent->mt_child = txn;
                txn->mt_parent = parent;
                txn->mt_numdbs = parent->mt_numdbs;
-               txn->mt_dbxs = parent->mt_dbxs;
                memcpy(txn->mt_dbs, parent->mt_dbs, txn->mt_numdbs * sizeof(MDB_db));
                /* Copy parent's mt_dbflags, but clear DB_NEW */
                for (i=0; i<txn->mt_numdbs; i++)
@@ -2954,7 +2954,7 @@ mdb_txn_end(MDB_txn *txn, unsigned mode)
                }
                txn->mt_numdbs = 0;             /* prevent further DBI activity */
                txn->mt_flags |= MDB_TXN_FINISHED;
-               txn->mt_dbxs = NULL;    /* mark txn as reset */
+
        } else if (!F_ISSET(txn->mt_flags, MDB_TXN_FINISHED)) {
                pgno_t *pghead = env->me_pghead;