From faa4b0c6f8d959a227a397cf63dacd1171efd61c Mon Sep 17 00:00:00 2001
From: Sebastian Messmer <mail@smessmer.de>
Date: Wed, 30 Sep 2015 13:17:35 +0200
Subject: [PATCH] Improve flush()

---
 implementations/onblocks/datatreestore/DataTree.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/implementations/onblocks/datatreestore/DataTree.cpp b/implementations/onblocks/datatreestore/DataTree.cpp
index 9d913371..e1e8ca94 100644
--- a/implementations/onblocks/datatreestore/DataTree.cpp
+++ b/implementations/onblocks/datatreestore/DataTree.cpp
@@ -126,6 +126,9 @@ const Key &DataTree::key() const {
 }
 
 void DataTree::flush() const {
+  // By grabbing a lock, we ensure that all modifying functions don't run currently and are therefore flushed
+  unique_lock<shared_mutex> lock(_mutex);
+  // We also have to flush the root node
   _rootNode->flush();
 }