Added license notice
diff --git a/src/main/cpp/threadutility.cpp b/src/main/cpp/threadutility.cpp
index a6c7ca2..94dd7a7 100644
--- a/src/main/cpp/threadutility.cpp
+++ b/src/main/cpp/threadutility.cpp
@@ -1,3 +1,20 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 "log4cxx/helpers/threadutility.h"
#include "log4cxx/private/log4cxx_private.h"
#include "log4cxx/helpers/loglog.h"
diff --git a/src/main/include/log4cxx/helpers/threadutility.h b/src/main/include/log4cxx/helpers/threadutility.h
index 84dd25f..35ddba7 100644
--- a/src/main/include/log4cxx/helpers/threadutility.h
+++ b/src/main/include/log4cxx/helpers/threadutility.h
@@ -1,3 +1,20 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.
+ */
+
#ifndef _LOG4CXX_THREADUTILITY_H
#define _LOG4CXX_THREADUTILITY_H
