ITS#10095 partial revert of ITS#9278 2fd44e325195ae81664eb5dc36e7d265927c5ebc

The patch was incorrect and introduced numerous race conditions.
The original problem was a FreeBSD bug, subsequently fixed:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=269277

diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index ea1a2ea5c973123c0abe83fbb8ac01ee69558dfc..bda0093d71c4f3517d2c347bd2a3cf1d6e31d734 100644 (file)
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -6272,17 +6272,6 @@ mdb_env_close_active(MDB_env *env, int excl)
                        if (excl > 0)
                                semctl(env->me_rmutex->semid, 0, IPC_RMID);
                }
-#elif defined(MDB_ROBUST_SUPPORTED)
-               /* If we have the filelock:  If we are the
-                * only remaining user, clean up robust
-                * mutexes.
-                */
-               if (excl == 0)
-                       mdb_env_excl_lock(env, &excl);
-               if (excl > 0) {
-                       pthread_mutex_destroy(env->me_txns->mti_rmutex);
-                       pthread_mutex_destroy(env->me_txns->mti_wmutex);
-               }
 #endif
                munmap((void *)env->me_txns, (env->me_maxreaders-1)*sizeof(MDB_reader)+sizeof(MDB_txninfo));
        }