From 086bc04cd2852753cc20eb812b9054eb545e3088 Mon Sep 17 00:00:00 2001 From: "leo@yuriev.ru" Date: Fri, 3 Jul 2015 23:01:00 +0200 Subject: [PATCH] ITS#7969 Use __sync_synchronize() The rest of 9a80a8a8e8feed56fbccd8851b8a789f7fff9c11 plus commit a937740aa0c47dc7a1a5e9be42dcea2dd3c81683. --- libraries/liblmdb/mdb.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c index 797c67b..2ee0b6a 100644 --- a/libraries/liblmdb/mdb.c +++ b/libraries/liblmdb/mdb.c @@ -3643,6 +3643,11 @@ mdb_env_write_meta(MDB_txn *txn) mp->mm_dbs[0] = txn->mt_dbs[0]; mp->mm_dbs[1] = txn->mt_dbs[1]; mp->mm_last_pg = txn->mt_next_pgno - 1; +#if (__GNUC__ * 100 + __GNUC_MINOR__ >= 404) && /* TODO: portability */ \ + !(defined(__i386__) || defined(__x86_64__)) + /* LY: issue a memory barrier, if not x86. ITS#7969 */ + __sync_synchronize(); +#endif mp->mm_txnid = txn->mt_txnid; if (!(flags & (MDB_NOMETASYNC|MDB_NOSYNC))) { unsigned meta_size = env->me_psize;