Free write mutex earlier in txn_reset0

diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index 70c4de263a879a6485a0568dcaca43d2c1829131..b36f3b12819b850726d71c021a361fd807d7fff7 100644 (file)
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -2798,12 +2798,26 @@ mdb_txn_reset0(MDB_txn *txn, const char *act)
                txn->mt_numdbs = 0;             /* close nothing if called again */
                txn->mt_dbxs = NULL;    /* mark txn as reset */
        } else {
+               pgno_t *pghead = env->me_pghead;
+               env->me_pghead = NULL;
+               env->me_pglast = 0;
+
+               if (!txn->mt_parent) {
+                       if (mdb_midl_shrink(&txn->mt_free_pgs))
+                               env->me_free_pgs = txn->mt_free_pgs;
+
+                       env->me_txn = NULL;
+                       /* The writer mutex was locked in mdb_txn_begin. */
+                       if (env->me_txns)
+                               UNLOCK_MUTEX(MDB_MUTEX(env, w));
+               }
+
                mdb_cursors_close(txn, 0);
 
                if (!(env->me_flags & MDB_WRITEMAP)) {
                        mdb_dlist_free(txn);
                }
-               mdb_midl_free(env->me_pghead);
+               mdb_midl_free(pghead);
 
                if (txn->mt_parent) {
                        txn->mt_parent->mt_child = NULL;
@@ -2811,18 +2825,7 @@ mdb_txn_reset0(MDB_txn *txn, const char *act)
                        mdb_midl_free(txn->mt_free_pgs);
                        mdb_midl_free(txn->mt_spill_pgs);
                        free(txn->mt_u.dirty_list);
-                       return;
                }
-
-               if (mdb_midl_shrink(&txn->mt_free_pgs))
-                       env->me_free_pgs = txn->mt_free_pgs;
-               env->me_pghead = NULL;
-               env->me_pglast = 0;
-
-               env->me_txn = NULL;
-               /* The writer mutex was locked in mdb_txn_begin. */
-               if (env->me_txns)
-                       UNLOCK_MUTEX(MDB_MUTEX(env, w));
        }
 }