Index: code/branches/libraries/src/util/CMakeLists.txt
===================================================================
--- code/branches/libraries/src/util/CMakeLists.txt	(revision 5639)
+++ code/branches/libraries/src/util/CMakeLists.txt	(revision 5640)
@@ -27,4 +27,5 @@
   OutputBuffer.cc
   OutputHandler.cc
+  Scope.cc
   SignalHandler.cc
   Sleep.cc
Index: code/branches/libraries/src/util/Scope.cc
===================================================================
--- code/branches/libraries/src/util/Scope.cc	(revision 5640)
+++ code/branches/libraries/src/util/Scope.cc	(revision 5640)
@@ -0,0 +1,35 @@
+/*
+ *   ORXONOX - the hottest 3D action shooter ever to exist
+ *                    > www.orxonox.net <
+ *
+ *
+ *   License notice:
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation; either version 2
+ *   of the License, or (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ *   Author:
+ *      Fabian 'x3n' Landau
+ *   Co-authors:
+ *      ...
+ *
+ */
+
+#include "Scope.h"
+
+namespace orxonox
+{
+    std::map<ScopeID::Value, int> ScopeManager::instanceCounts_s;
+    std::map<ScopeID::Value, std::set<ScopeListener*> > ScopeManager::listeners_s;
+}
Index: code/branches/libraries/src/util/Scope.h
===================================================================
--- code/branches/libraries/src/util/Scope.h	(revision 5640)
+++ code/branches/libraries/src/util/Scope.h	(revision 5640)
@@ -0,0 +1,139 @@
+/*
+ *   ORXONOX - the hottest 3D action shooter ever to exist
+ *                    > www.orxonox.net <
+ *
+ *
+ *   License notice:
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation; either version 2
+ *   of the License, or (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ *   Author:
+ *      Fabian 'x3n' Landau
+ *   Co-authors:
+ *      ...
+ *
+ */
+
+#ifndef __Util_Scope_H__
+#define __Util_Scope_H__
+
+#include "UtilPrereqs.h"
+#include <cassert>
+#include <set>
+#include <map>
+#include "Debug.h"
+
+namespace orxonox
+{
+    namespace ScopeID
+    {
+        /**
+            @brief A list of available scopes for the Scope template.
+        */
+        enum Value
+        {
+            GSRoot,
+            GSGraphics,
+            GSLevel
+        };
+    }
+
+    /**
+        @brief The ScopeManager stores the variables of the scope templates in a statically linked context.
+    */
+    class _UtilExport ScopeManager
+    {
+        template <ScopeID::Value scope>
+        friend class Scope;
+        friend class ScopeListener;
+
+        private:
+            static std::map<ScopeID::Value, int> instanceCounts_s;                  //!< Counts the number of active instances (>0 means active) for a scope
+            static std::map<ScopeID::Value, std::set<ScopeListener*> > listeners_s; //!< Stores all listeners for a scope
+    };
+
+    /**
+        @brief ScopeListeners register themselves in the corresponding scope and wait for notifications.
+    */
+    class _UtilExport ScopeListener
+    {
+        template <ScopeID::Value scope>
+        friend class Scope;
+
+        protected:
+            //! Constructor: Registers the instance.
+            ScopeListener(ScopeID::Value scope) : scope_(scope)
+                { ScopeManager::listeners_s[this->scope_].insert(this); }
+            //! Destructor: Unregisters the instance.
+            virtual ~ScopeListener()
+                { ScopeManager::listeners_s[this->scope_].erase(this); }
+
+            //! Gets called if the scope is activated
+            virtual void activated() = 0;
+            //! Gets called if the scope is deactivated
+            virtual void deactivated() = 0;
+
+        private:
+            ScopeID::Value scope_; //!< Store the scope to unregister on destruction
+    };
+
+    /**
+        @brief A scope for a given template argument is either active or not.
+
+        Objects inheriting from a ScopeListener are registered in a list (different for each scope).
+        If the scope gets activated or deactivated, all objects in this list are notified.
+    */
+    template <ScopeID::Value scope>
+    class Scope
+    {
+        public:
+            //! Constructor: Increases the instance counter and activates the scope if the count went from 0 to 1. Counts >1 don't change anything.
+            Scope()
+            {
+                ScopeManager::instanceCounts_s[scope]++;
+                assert(ScopeManager::instanceCounts_s[scope] > 0);
+                if (ScopeManager::instanceCounts_s[scope] == 1)
+                {
+                    for (typename std::set<ScopeListener*>::iterator it = ScopeManager::listeners_s[scope].begin(); it != ScopeManager::listeners_s[scope].end(); )
+                        (*(it++))->activated();
+                }
+            }
+
+            //! Destructor: Decreases the instance counter and deactivates the scope if the count went from 1 to 0. Counts >0 don't change anything.
+            ~Scope()
+            {
+                ScopeManager::instanceCounts_s[scope]--;
+
+                // This shouldn't happen but just to be sure: check if the count is positive
+                assert(ScopeManager::instanceCounts_s[scope] >= 0);
+                if (ScopeManager::instanceCounts_s[scope] < 0)
+                    ScopeManager::instanceCounts_s[scope] = 0;
+
+                if (ScopeManager::instanceCounts_s[scope] == 0)
+                {
+                    for (typename std::set<ScopeListener*>::iterator it = ScopeManager::listeners_s[scope].begin(); it != ScopeManager::listeners_s[scope].end(); )
+                        (*(it++))->deactivated();
+                }
+            }
+
+            //! Returns true if the scope is active.
+            static bool isActive()
+            {
+                return (ScopeManager::instanceCounts_s[scope] > 0);
+            }
+    };
+}
+
+#endif /* __Util_Scope_H__ */
Index: code/branches/libraries/src/util/ScopedSingleton.h
===================================================================
--- code/branches/libraries/src/util/ScopedSingleton.h	(revision 5640)
+++ code/branches/libraries/src/util/ScopedSingleton.h	(revision 5640)
@@ -0,0 +1,102 @@
+/*
+ *   ORXONOX - the hottest 3D action shooter ever to exist
+ *                    > www.orxonox.net <
+ *
+ *
+ *   License notice:
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation; either version 2
+ *   of the License, or (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ *   Author:
+ *      Fabian 'x3n' Landau
+ *   Co-authors:
+ *      ...
+ *
+ */
+
+#ifndef __Util_ScopedSingleton_H__
+#define __Util_ScopedSingleton_H__
+
+#include "UtilPrereqs.h"
+#include <cassert>
+
+#include "Scope.h"
+
+namespace orxonox
+{
+    /**
+    @brief
+        Base for scoped singleton classes.
+        A Scoped singleton creates itself if the scope is active and getInstance() is called.
+        Destroys itself if the scope is deactivated.
+
+        Usage:
+        Inherit publicly from ScopedSingleton<MyClass, scope> and provide access to
+        MyClass::singletonPtr_s.
+        This can easily be done with a friend declaration.
+
+        See @ref UtilPrereqs.h for a list of scopes (ScopeID::Value).
+    */
+    template <class T, ScopeID::Value scope>
+    class ScopedSingleton : public ScopeListener
+    {
+        public:
+            //! Returns a reference to the singleton instance
+            static T& getInstance()
+            {
+                assert(Scope<scope>::isActive());
+
+                if (!T::singletonPtr_s && Scope<scope>::isActive())
+                    T::singletonPtr_s = new T();
+
+                return *T::singletonPtr_s;
+            }
+
+        protected:
+            //! Constructor sets the singleton instance pointer
+            ScopedSingleton() : ScopeListener(scope)
+            {
+                assert(T::singletonPtr_s == 0);
+                T::singletonPtr_s = static_cast<T*>(this);
+            }
+
+            //! Constructor resets the singleton instance pointer
+            ~ScopedSingleton()
+            {
+                assert(T::singletonPtr_s != 0);
+                T::singletonPtr_s = 0;
+            }
+
+        private:
+            //! Called if the Scope of this Singleton gets active (no instance should be active then)
+            void activated()
+            {
+                // The ScopedSingleton shouldn't be active bevor the scope is activated -> always assertion failed
+                assert(T::singletonPtr_s == 0 && false);
+            }
+
+            //! Called if the Scope of this Singleton gets deactivated (destroys the instance)
+            void deactivated()
+            {
+                if (T::singletonPtr_s)
+                {
+                    delete T::singletonPtr_s;
+                    T::singletonPtr_s = 0;
+                }
+            }
+    };
+}
+
+#endif /* __Util_ScopedSingleton_H__ */
