diff -r 923ff622b8b9 -r 4633027730f5 src/hbservers/hbthemeserver/hbcache_p.cpp --- a/src/hbservers/hbthemeserver/hbcache_p.cpp Tue Jul 06 14:36:53 2010 +0300 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,175 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies). -** All rights reserved. -** Contact: Nokia Corporation (developer.feedback@nokia.com) -** -** This file is part of the HbServers module of the UI Extensions for Mobile. -** -** GNU Lesser General Public License Usage -** This file may be used under the terms of the GNU Lesser General Public -** License version 2.1 as published by the Free Software Foundation and -** appearing in the file LICENSE.LGPL included in the packaging of this file. -** Please review the following information to ensure the GNU Lesser General -** Public License version 2.1 requirements will be met: -** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. -** -** In addition, as a special exception, Nokia gives you certain additional -** rights. These rights are described in the Nokia Qt LGPL Exception -** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. -** -** If you have questions regarding the use of this file, please contact -** Nokia at developer.feedback@nokia.com. -** -****************************************************************************/ - -#include "hbcache_p.h" -#include "hbmemoryutils_p.h" - -/*! - \fn HbCache::HbCache() - Ctor - */ -HbCache::HbCache() -{ - -} - -/*! - \fn HbCache::HbCache() - Dtor - */ -HbCache::~HbCache() -{ - clear(); -} - -/*! - \fn HbCache::value() - Value provides a mechanism for returning the value of the cache item associated with the key - \a key denotes the unique identifier for the cache item whose value is to be returned - - */ -HbCacheItem* HbCache::value(const QString &key) const -{ - return cache.value(key, 0); -} - -/*! - \fn HbCache::cacheItem() - Provides a mechanism for finidng whether a cache item is present in the cache. - If found, returns the cache item and increments the reference count else returns NULL. - \a key denotes the unique identifier for the cache item that is to be searched in the cache. - - */ -HbCacheItem* HbCache::cacheItem(const QString &key) -{ - HbCacheItem *item = 0; - if (!cache.contains(key)) { - return 0; - } - // Get the cache item associated with the key - item = cache[key]; - item->refCount++; - //if item is also present in LRU list, remove it from there to avoid - // deletion following LRU policy - if (unusedResources.contains(item)) { - unusedResources.removeAll(item); - } - return item; -} - -/*! - \fn HbCache::insert() - Provides a mechanism for inserting a cache item into cache. - If successful, this function increases item's reference count by one and returns true. - \a key denotes the unique identifier for the cache item that is to be searched in the cache. - \a item represents the cache-item to be inserted. - */ -bool HbCache::insert(const QString &key, HbCacheItem *item) -{ - if (!item) { - return false; - } - cache.insert(key, const_cast(item)); - item->refCount++; - //if item is also present in LRU list, remove it from there to avoid - // deletion following LRU policy - if (unusedResources.contains(item)) { - unusedResources.removeAll(item); - } - return true; -} - -/*! - \fn HbCache::remove() - Provides a mechanism for removing a cache item from cache. - If successful, this function decreases item's reference count by one and if - the reference count reaches zero for an item, it's pushed at the back of - unused-resources list for removal later in case of OOM scenario. - \a key denotes the unique identifier for the cache item that is to be searched in the cache. - */ -bool HbCache::remove(const QString &key) -{ - if (key.isEmpty() || !cache.contains(key)) { - return false; - } - HbCacheItem *item = cache[key]; - //reference count can obviously be never less than zero, meaning that for all the - //css files stored with server-css-cache, there would be minimum zero client (app) - //associated - if (item->refCount > 0) { - item->refCount--; - } - if (item->refCount == 0) { - //Inserting item with ref-count 0 into unused-resources list for removal policy later - // in case of OOM condition - unusedResources.append(item); - } - return true; -} - -/*! - \fn HbCache::contains() - Returns true if an item is found in the cache corresponding to given key. - \a key denotes the unique identifier for the cache item that is to be searched in the cache. - */ -bool HbCache::contains(const QString &key) const -{ - return (cache.contains(key)); -} - -/*! - \fn HbCache::lruList() - Returns a handle to the list of cache which holds cache-items with zero reference count. - */ -QList &HbCache::lruList() -{ - return unusedResources; -} - -/*! - \fn HbCache::cacheHandle() - Returns a handle to the cache which holds (css-file-name, cacheItem) key-value pair. - */ -QHash &HbCache::cacheHandle() -{ - return cache; -} -/*! - \fn HbCache::clear() - Clears the shared resources allocated by cache-items and deletes all cache-items. - */ -void HbCache::clear() -{ - GET_MEMORY_MANAGER(HbMemoryManager::SharedMemory); - QHash::const_iterator itEnd(cache.constEnd()); - for (QHash::const_iterator iter = cache.constBegin(); - iter != itEnd; - ++iter) { - HbCacheItem *temp = iter.value(); - manager->free(temp->offset); - delete temp; - } - cache.clear(); -}