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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
-