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/*
KNode, the KDE newsreader
Copyright (c) 1999-2005 the KNode authors.
See file AUTHORS for details
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.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, US
*/
#include <kdebug.h>
#include "knmemorymanager.h"
#include "knfolder.h"
#include "knglobals.h"
#include "knconfigmanager.h"
#include "knarticlemanager.h"
#include "kngroupmanager.h"
#include "knfoldermanager.h"
KNMemoryManager::KNMemoryManager()
: c_ollCacheSize(0), a_rtCacheSize(0)
{
}
KNMemoryManager::~KNMemoryManager()
{
for ( QValueList<CollectionItem*>::Iterator it = mColList.begin(); it != mColList.end(); ++it )
delete (*it);
for ( QValueList<ArticleItem*>::Iterator it = mArtList.begin(); it != mArtList.end(); ++it )
delete (*it);
}
void KNMemoryManager::updateCacheEntry(KNArticleCollection *c)
{
CollectionItem *ci;
int oldSize=0;
if( (ci=findCacheEntry(c, true)) ) { // item is taken from the list
oldSize=ci->storageSize;
ci->sync();
kdDebug(5003) << "KNMemoryManager::updateCacheEntry() : collection (" << c->name() << ") updated" << endl;
}
else {
ci=new CollectionItem(c);
kdDebug(5003) << "KNMemoryManager::updateCacheEntry() : collection (" << c->name() << ") added" << endl;
}
mColList.append(ci);
c_ollCacheSize += (ci->storageSize - oldSize);
checkMemoryUsageCollections();
}
void KNMemoryManager::removeCacheEntry(KNArticleCollection *c)
{
CollectionItem *ci;
ci=findCacheEntry(c, true);
if(ci) {
c_ollCacheSize -= ci->storageSize;
delete ci;
kdDebug(5003) << "KNMemoryManager::removeCacheEntry() : collection removed (" << c->name() << "), "
<< mColList.count() << " collections left in cache" << endl;
}
}
void KNMemoryManager::prepareLoad(KNArticleCollection *c)
{
CollectionItem ci(c);
c_ollCacheSize += ci.storageSize;
checkMemoryUsageCollections();
c_ollCacheSize -= ci.storageSize;
}
void KNMemoryManager::updateCacheEntry(KNArticle *a)
{
ArticleItem *ai;
int oldSize=0;
if( (ai=findCacheEntry(a, true)) ) {
oldSize=ai->storageSize;
ai->sync();
kdDebug(5003) << "KNMemoryManager::updateCacheEntry() : article updated" << endl;
}
else {
ai=new ArticleItem(a);
kdDebug(5003) << "KNMemoryManager::updateCacheEntry() : article added" << endl;
}
mArtList.append(ai);
a_rtCacheSize += (ai->storageSize - oldSize);
checkMemoryUsageArticles();
}
void KNMemoryManager::removeCacheEntry(KNArticle *a)
{
ArticleItem *ai;
if( (ai=findCacheEntry(a, true)) ) {
a_rtCacheSize -= ai->storageSize;
delete ai;
kdDebug(5003) << "KNMemoryManager::removeCacheEntry() : article removed, "
<< mArtList.count() << " articles left in cache" << endl;
}
}
KNMemoryManager::CollectionItem* KNMemoryManager::findCacheEntry(KNArticleCollection *c, bool take)
{
for ( QValueList<CollectionItem*>::Iterator it = mColList.begin(); it != mColList.end(); ++it ) {
if ( (*it)->col == c ) {
CollectionItem *ret = (*it);
if ( take )
mColList.remove( it );
return ret;
}
}
return 0;
}
KNMemoryManager::ArticleItem* KNMemoryManager::findCacheEntry(KNArticle *a, bool take)
{
for ( QValueList<ArticleItem*>::Iterator it = mArtList.begin(); it != mArtList.end(); ++it ) {
if ( (*it)->art == a ) {
ArticleItem *ret = (*it);
if ( take )
mArtList.remove( it );
return ret;
}
}
return 0;
}
void KNMemoryManager::checkMemoryUsageCollections()
{
int maxSize = knGlobals.configManager()->readNewsGeneral()->collCacheSize() * 1024;
KNArticleCollection *c=0;
if (c_ollCacheSize > maxSize) {
QValueList<CollectionItem*> tempList( mColList ); // work on a copy, KNGroup-/Foldermanager will
// modify the original list
for ( QValueList<CollectionItem*>::Iterator it = tempList.begin(); it != tempList.end(); ) {
if ( c_ollCacheSize <= maxSize )
break;
// unloadHeaders() will remove the cache entry and thus invalidate the iterator!
c = (*it)->col;
++it;
if (c->type() == KNCollection::CTgroup)
knGlobals.groupManager()->unloadHeaders(static_cast<KNGroup*>(c), false); // *try* to unload
else
if (c->type() == KNCollection::CTfolder)
knGlobals.folderManager()->unloadHeaders(static_cast<KNFolder*>(c), false); // *try* to unload
}
}
kdDebug(5003) << "KNMemoryManager::checkMemoryUsageCollections() : "
<< mColList.count() << " collections in cache => Usage : "
<< ( c_ollCacheSize*100.0 / maxSize ) << "%" << endl;
}
void KNMemoryManager::checkMemoryUsageArticles()
{
int maxSize = knGlobals.configManager()->readNewsGeneral()->artCacheSize() * 1024;
if (a_rtCacheSize > maxSize) {
QValueList<ArticleItem*> tempList( mArtList ); // work on a copy, KNArticlemanager will
// modify the original list
for ( QValueList<ArticleItem*>::Iterator it = mArtList.begin(); it != mArtList.end(); ) {
if ( a_rtCacheSize <= maxSize )
break;
// unloadArticle() will remove the cache entry and thus invalidate the iterator!
KNArticle *art = (*it)->art;
++it;
knGlobals.articleManager()->unloadArticle( art, false ); // *try* to unload
}
}
kdDebug(5003) << "KNMemoryManager::checkMemoryUsageArticles() : "
<< mArtList.count() << " articles in cache => Usage : "
<< ( a_rtCacheSize*100.0 / maxSize ) << "%" << endl;
}
void KNMemoryManager::ArticleItem::sync()
{
storageSize=art->storageSize();
}
void KNMemoryManager::CollectionItem::sync()
{
storageSize=col->length()*1024; // rule of thumb : ~1k per header
}
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