Main Page   Namespace List   Class Hierarchy   Compound List   File List   Compound Members   Related Pages  

DCCache.h

00001 /*
00002  * DCCache
00003  *
00004  * Copyright (C) 2001 Barnaby Gray <barnaby@beedesign.co.uk>
00005  *
00006  * This library is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU Lesser General Public
00008  * License as published by the Free Software Foundation; either
00009  * version 2.1 of the License, or (at your option) any later version.
00010  *
00011  * This library is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Lesser General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Lesser General Public
00017  * License along with this library; if not, write to the Free Software
00018  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
00019  *
00020  */
00021 
00022 #ifndef DCCACHE_H
00023 #define DCCACHE_H
00024 
00025 #include <libicq2000/Cache.h>
00026 
00027 #include <sigc++/signal_system.h>
00028 
00029 using SigC::Signal1;
00030 
00031 namespace ICQ2000 {
00032 
00033   /* fd -> DirectClient cache
00034    *
00035    * Where the party is at. Once a DirectClient object is added to the
00036    * cache MM for it is assumed on the cache. Also lookups for a
00037    * Contact are done in linear time now, it was just too much of a
00038    * head-ache maintaining the uin map in Client.
00039    */
00040   class DCCache : public Cache<int, DirectClient*> {
00041    public:
00042     DCCache() { }
00043     ~DCCache()
00044     {
00045       removeAll();
00046     }
00047 
00048     void removeItem(const DCCache::literator& l) {
00049       delete ((*l).getValue());
00050       Cache<int, DirectClient*>::removeItem(l);
00051     }
00052 
00053     void expireItem(const DCCache::literator& l) {
00054       expired.emit( (*l).getValue() );
00055       Cache<int, DirectClient*>::expireItem(l);
00056       /* this will removeItem(..), which'll delete the DirectClient
00057        * (see above).
00058        */
00059     }
00060 
00061     void removeContact(const ContactRef& c) {
00062       literator curr = m_list.begin();
00063       literator next = curr;
00064       while ( curr != m_list.end() ) {
00065         DirectClient *dc = (*curr).getValue();
00066         ++next;
00067         if ( dc->getContact().get() != NULL
00068              /* Direct Connections won't have a contact associated
00069               * with them initially just after having been accepted as
00070               * an incoming connection (we don't know who they are
00071               * yet) - so Contact could be a NULL ref.
00072               */
00073              && dc->getContact()->getUIN() == c->getUIN() ) {
00074           removeItem(curr);
00075         }
00076         curr = next;
00077       }
00078     }
00079 
00080     DirectClient* getByContact(const ContactRef& c)
00081     {
00082       // linear lookup
00083       literator curr = m_list.begin();
00084       while ( curr != m_list.end() ) {
00085         DirectClient *dc = (*curr).getValue();
00086         if (  dc->getContact().get() != NULL
00087              /* Direct Connections won't have a contact associated
00088               * with them initially just after having been accepted as
00089               * an incoming connection (we don't know who they are
00090               * yet) - so Contact could be a NULL ref.
00091               */
00092              && dc->getContact()->getUIN() == c->getUIN() )
00093           return dc; // found it
00094 
00095         ++curr;
00096       }
00097 
00098       return NULL; // not found
00099     }
00100 
00101     void clearoutMessagesPoll() {
00102       literator curr = m_list.begin();
00103       while ( curr != m_list.end() ) {
00104         DirectClient *dc = (*curr).getValue();
00105         dc->clearoutMessagesPoll();
00106         ++curr;
00107       }
00108     }
00109 
00110     Signal1<void,DirectClient*> expired;
00111   };
00112   
00113 }
00114 
00115 #endif

Generated on Sat Jul 20 16:59:08 2002 for libicq2000 by doxygen1.2.16