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diff --git a/flow/cache.h b/flow/cache.h
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+++ b/flow/cache.h
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+    /*
+
+    Copyright (C) 2000 Stefan Westerfeld
+                       stefan@space.twc.de
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+  
+    This library 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
+    Library General Public License for more details.
+   
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+    Boston, MA 02111-1307, USA.
+
+    */
+
+#ifndef _SYNTH_CACHE_H
+#define _SYNTH_CACHE_H
+
+#include <time.h>
+#include <list>
+#include <string>
+#include "startupmanager.h"
+#include "arts_export.h"
+
+/*
+ * BC - Status (2002-03-08): Cache, CachedObject
+ *
+ * At the current point in time, there are NO GUARANTEES, so only use this
+ * in apps part of official KDE releases (such as kdemultimedia apps), which
+ * know what is happening here.
+ */
+
+namespace Arts {
+class Cache;
+
+class ARTS_EXPORT CachedObject
+{
+private:
+	std::string _object_key;
+	int _ref_cnt;
+	time_t _lastAccess;
+
+protected:
+	void setKey(std::string key);
+
+public:
+	std::string getKey();
+
+	time_t lastAccess();
+
+	void decRef();
+	void incRef();
+	int refCnt();
+
+	virtual bool isValid();
+	virtual int memoryUsage() = 0;
+
+	CachedObject(Cache *cache);
+	virtual ~CachedObject();
+};
+
+class ARTS_EXPORT Cache
+{
+protected:
+	std::list<CachedObject *> objects;
+	Cache();
+	~Cache();
+
+	static Cache *_instance;
+
+public:
+	static Cache *the();
+	static void shutdown();
+
+	static long memused;
+
+	CachedObject *get(std::string key);
+	void add(CachedObject *object);
+
+	// garbage collection; returns amount of memory used (after cleaning)
+	long cleanUp(long cacheLimit);
+};
+
+}
+#endif