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93 lines
2.0 KiB
93 lines
2.0 KiB
/*
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Copyright (C) 2000 Stefan Westerfeld
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stefan@space.twc.de
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#ifndef _SYNTH_CACHE_H
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#define _SYNTH_CACHE_H
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#include <time.h>
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#include <list>
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#include <string>
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#include "startupmanager.h"
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#include "arts_export.h"
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/*
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* BC - Status (2002-03-08): Cache, CachedObject
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*
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* At the current point in time, there are NO GUARANTEES, so only use this
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* in apps part of official KDE releases (such as tdemultimedia apps), which
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* know what is happening here.
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*/
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namespace Arts {
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class Cache;
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class ARTS_EXPORT CachedObject
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{
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private:
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std::string _object_key;
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int _ref_cnt;
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time_t _lastAccess;
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protected:
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void setKey(std::string key);
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public:
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std::string getKey();
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time_t lastAccess();
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void decRef();
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void incRef();
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int refCnt();
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virtual bool isValid();
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virtual int memoryUsage() = 0;
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CachedObject(Cache *cache);
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virtual ~CachedObject();
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};
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class ARTS_EXPORT Cache
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{
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protected:
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std::list<CachedObject *> objects;
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Cache();
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~Cache();
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static Cache *_instance;
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public:
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static Cache *the();
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static void shutdown();
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static long memused;
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CachedObject *get(std::string key);
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void add(CachedObject *object);
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// garbage collection; returns amount of memory used (after cleaning)
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long cleanUp(long cacheLimit);
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};
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}
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#endif
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