From f626acb39822f905dad4ce65d03a27fd05b9fee8 Mon Sep 17 00:00:00 2001
From: Leonid Yuriev <leo@yuriev.ru>
Date: Mon, 19 Nov 2018 13:30:10 +0300
Subject: [PATCH] mdbx: relax DBI-sequences for concurrent open DBI-handles for
 present tables.

Change-Id: I7f07d2e716074bd9c2847aeb062e366f46cca214
---
 src/mdbx.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/mdbx.c b/src/mdbx.c
index be1b3e56..8dd24e8d 100644
--- a/src/mdbx.c
+++ b/src/mdbx.c
@@ -12100,19 +12100,19 @@ int mdbx_dbi_open_ex(MDBX_txn *txn, const char *table_name, unsigned user_flags,
   bailout:
     mdbx_free(namedup);
   } else {
-    txn->mt_dbiseqs[slot] = (env->me_dbiseqs[slot] += 1);
     txn->mt_dbflags[slot] = (uint8_t)dbflag;
     txn->mt_dbxs[slot].md_name.iov_base = namedup;
-    mdbx_compiler_barrier();
     txn->mt_dbxs[slot].md_name.iov_len = len;
-    if (slot == txn->mt_numdbs)
-      txn->mt_numdbs++;
+    txn->mt_numdbs += (slot == txn->mt_numdbs);
     if ((dbflag & DB_CREAT) == 0) {
       env->me_dbflags[slot] = txn->mt_dbs[slot].md_flags | MDBX_VALID;
       mdbx_compiler_barrier();
       if (env->me_numdbs <= slot)
         env->me_numdbs = slot + 1;
+    } else {
+      env->me_dbiseqs[slot] += 1;
     }
+    txn->mt_dbiseqs[slot] = env->me_dbiseqs[slot];
     *dbi = slot;
   }