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/***************************************************************************
copyright : (C) 2006 by David Nolden
email : [email protected]
***************************************************************************/
/***************************************************************************
* *
* 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 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "cachemanager.h"
#include <kdebug.h>
void CacheNode::access() const {
m_manager->access( this );
}
void CacheManager::remove( const CacheNode* node ) {
m_set.erase( node );
}
void CacheManager::add( const CacheNode* node ) {
m_set.insert( node );
}
CacheNode::CacheNode( Manager* manager ) : m_manager( manager ), m_value(manager->currentMax()) { //initialize m_value with the current maximum, so the new node has a chance even in a cache full of high-rated nodes
m_manager->add( this );
}
CacheNode::~CacheNode() {
m_manager->remove( this );
};
void CacheManager::restart( uint normalizeby ) {
m_currentFrame = 1;
m_currentMax = 1;
SetType oldSet = m_set;
m_set = SetType();
for( SetType::iterator it = oldSet.begin(); it != oldSet.end(); ++it ) {
int newValue = (*it)->value() / ( normalizeby / 1000 );
if( newValue > m_currentMax ) m_currentMax = newValue;
(*it)->setValue( newValue ); ///This way not all information is discarded
m_set.insert( *it );
}
}
void CacheManager::access( const CacheNode* node ) {
static const int limit = (std::numeric_limits<uint>::max() / 3)*2;
m_set.erase( node );
node->setValue( m_currentMax+1 );
m_set.insert( node );
if( node->value() > m_currentMax )
m_currentMax = node->value();
if( node->value() > limit )
restart( node->value() );
}
void CacheManager::setMaxNodes ( int maxNodes ) {
m_maxNodes = maxNodes;
increaseFrame();
}
void CacheManager::increaseFrame() {
m_currentFrame ++;
if( m_set.size() > m_maxNodes ) {
//kdDebug( 9007 ) << "CacheManager: Have " << m_set.size() << " nodes, maximum is " << m_maxNodes << ", erasing." << endl;
int mustErase = m_set.size() - m_maxNodes;
while( !m_set.empty() && mustErase != 0 ) {
--mustErase;
SetType::iterator it = m_set.begin();
erase( *it );
}
//kdDebug( 9007 ) << "CacheManager: Have " << m_set.size() << " nodes after erasing." << endl;
}
}
void CacheManager::removeLowerHalf() {
int maxNodes = m_maxNodes;
setMaxNodes( m_set.size() / 2 );
setMaxNodes( maxNodes );
}
void CacheManager::saveMemory() {
removeLowerHalf();
}
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