/*
* lftp - file transfer program
*
* Copyright (c) 1996-2012 by Alexander V. Lukyanov (lav@yars.free.net)
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef CACHE_H
#define CACHE_H
#include "Timer.h"
class CacheEntry : public Timer
{
friend class Cache;
CacheEntry *next;
public:
CacheEntry() { next=0; }
virtual int EstimateSize() const { return 1; }
virtual ~CacheEntry() {}
};
class Cache
{
const ResType *res_max_size;
const ResType *res_enable;
protected:
CacheEntry *chain;
CacheEntry **curr;
CacheEntry *IterateFirst();
CacheEntry *IterateNext();
CacheEntry *IterateDelete();
public:
void Trim();
void Flush();
Cache(const ResType *s,const ResType *e) {
res_max_size=s;
res_enable=e;
chain=0;
curr=0;
}
~Cache() { Flush(); }
bool IsEnabled(const char *closure) { return res_enable->QueryBool(closure); }
long SizeLimit() { return res_max_size->Query(0); }
void AddCacheEntry(CacheEntry *e) {
e->next=chain;
chain=e;
}
};
#endif//CACHE_H