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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
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