--- /dev/null
+/*
+ Copyright (c) 2018-2019 Nokia.
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+#include "private/engine.hpp"
+#include <sys/epoll.h>
+
+using namespace shareddatalayer;
+
+const unsigned int Engine::EVENT_IN(EPOLLIN);
+const unsigned int Engine::EVENT_OUT(EPOLLOUT);
+const unsigned int Engine::EVENT_ERR(EPOLLERR);
+const unsigned int Engine::EVENT_HUP(EPOLLHUP);