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diff --git a/src/main/include/log4cxx/helpers/filewatchdog.h b/src/main/include/log4cxx/helpers/filewatchdog.h
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+++ b/src/main/include/log4cxx/helpers/filewatchdog.h
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+/*
+ * 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_HELPERS_FILEWATCHDOG_H
+#define _LOG4CXX_HELPERS_FILEWATCHDOG_H
+
+#include <log4cxx/logstring.h>
+#include <time.h>
+#include <log4cxx/helpers/pool.h>
+#include <log4cxx/helpers/thread.h>
+#include <log4cxx/file.h>
+
+namespace log4cxx
+{
+        namespace helpers
+        {
+
+                /**
+                Check every now and then that a certain file has not changed. If it
+                has, then call the #doOnChange method.
+                */
+                class LOG4CXX_EXPORT FileWatchdog
+                {
+                public:
+                        virtual ~FileWatchdog();
+                        /**
+                        The default delay between every file modification check, set to 60
+                        seconds.  */
+                        static long DEFAULT_DELAY /*= 60000*/;
+
+                protected:
+                        /**
+                        The name of the file to observe  for changes.
+                        */
+                        File file;
+
+                        /**
+                        The delay to observe between every check.
+                        By default set DEFAULT_DELAY.*/
+                        long delay;
+                        log4cxx_time_t lastModif;
+                        bool warnedAlready;
+                        volatile unsigned int interrupted;
+
+                protected:
+                        FileWatchdog(const File& filename);
+                        virtual void doOnChange() = 0;
+                        void checkAndConfigure();
+
+                public:
+                        /**
+                        Set the delay to observe between each check of the file changes.
+                        */
+                        void setDelay(long delay1)
+                                { this->delay = delay1; }
+
+                        void start();
+
+                private:
+                    static void* LOG4CXX_THREAD_FUNC run(apr_thread_t* thread, void* data);
+                        Pool pool;
+                        Thread thread;
+
+                        FileWatchdog(const FileWatchdog&);
+                        FileWatchdog& operator=(const FileWatchdog&);
+
+                };
+        }  // namespace helpers
+} // namespace log4cxx
+
+
+#endif // _LOG4CXX_HELPERS_FILEWATCHDOG_H