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diff --git a/libdash/source/network/DownloadStateManager.h b/libdash/source/network/DownloadStateManager.h
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+++ b/libdash/source/network/DownloadStateManager.h
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+/*
+ * DownloadStateManager.h
+ *****************************************************************************
+ * Copyright (C) 2012, bitmovin Softwareentwicklung OG, All Rights Reserved
+ *
+ * Email: libdash-dev@vicky.bitmovin.net
+ *
+ * This source code and its use and distribution, is subject to the terms
+ * and conditions of the applicable license agreement.
+ *****************************************************************************/
+
+#ifndef DOWNLOADSTATEMANAGER_H_
+#define DOWNLOADSTATEMANAGER_H_
+
+#include "config.h"
+
+#include "IDownloadObserver.h"
+#include "../portable/MultiThreading.h"
+
+namespace dash
+{
+    namespace network
+    {
+        class DownloadStateManager
+        {
+            public:
+                DownloadStateManager            ();
+                virtual ~DownloadStateManager   ();
+
+                DownloadState   State           () const;
+                void            WaitState       (DownloadState state) const;
+                void            CheckAndWait    (DownloadState check, DownloadState wait) const;
+                void            CheckAndSet     (DownloadState check, DownloadState set);
+                void            State           (DownloadState state);
+                void            Attach          (IDownloadObserver *observer);
+                void            Detach          (IDownloadObserver *observer);
+
+            private:
+                DownloadState               state;
+                mutable CRITICAL_SECTION    stateLock;
+                mutable CONDITION_VARIABLE  stateChanged;
+
+                std::vector<IDownloadObserver *>    observers;
+
+                void Notify ();
+        };
+    }
+}
+
+#endif /* DOWNLOADSTATEMANAGER_H_ */