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129 lines
3.9 KiB
C++
129 lines
3.9 KiB
C++
/* -*- mode: c++; c-basic-offset:4 -*-
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uiserver/sessiondata.cpp
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This file is part of Kleopatra, the KDE keymanager
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Copyright (c) 2009 Klarälvdalens Datakonsult AB
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Kleopatra is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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Kleopatra is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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In addition, as a special exception, the copyright holders give
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permission to link the code of this program with any edition of
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the Qt library by Trolltech AS, Norway (or with modified versions
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of Qt that use the same license as Qt), and distribute linked
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combinations including the two. You must obey the GNU General
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Public License in all respects for all of the code used other than
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Qt. If you modify this file, you may extend this exception to
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your version of the file, but you are not obligated to do so. If
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you do not wish to do so, delete this exception statement from
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your version.
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*/
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#include <config-kleopatra.h>
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#include "sessiondata.h"
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#include <KDebug>
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#include <QMutex>
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#include <boost/bind.hpp>
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using namespace Kleo;
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using namespace boost;
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static const int GARBAGE_COLLECTION_INTERVAL = 60000; // 1min
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static QMutex mutex;
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SessionData::SessionData()
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: mementos(),
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ref( 0 ),
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ripe( false )
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{
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}
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// static
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shared_ptr<SessionDataHandler> SessionDataHandler::instance() {
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mutex.lock();
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static SessionDataHandler handler;
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return shared_ptr<SessionDataHandler>( &handler, boost::bind( &QMutex::unlock, &mutex ) );
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}
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SessionDataHandler::SessionDataHandler()
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: QObject(),
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data(),
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timer()
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{
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timer.setInterval( GARBAGE_COLLECTION_INTERVAL );
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timer.setSingleShot( false );
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}
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void SessionDataHandler::enterSession( unsigned int id ) {
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kDebug() << id;
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const shared_ptr<SessionData> sd = sessionDataInternal( id );
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assert( sd );
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++sd->ref;
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sd->ripe = false;
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}
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void SessionDataHandler::exitSession( unsigned int id ) {
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kDebug() << id;
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const shared_ptr<SessionData> sd = sessionDataInternal( id );
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assert( sd );
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if ( --sd->ref <= 0 ) {
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sd->ref = 0;
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sd->ripe = false;
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if ( !timer.isActive() )
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QMetaObject::invokeMethod( &timer, "start", Qt::QueuedConnection );
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}
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}
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shared_ptr<SessionData> SessionDataHandler::sessionDataInternal( unsigned int id ) const {
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std::map< unsigned int, shared_ptr<SessionData> >::iterator
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it = data.lower_bound( id );
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if ( it == data.end() || it->first != id ) {
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const shared_ptr<SessionData> sd( new SessionData );
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it = data.insert( it, std::make_pair( id, sd ) );
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}
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return it->second;
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}
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shared_ptr<SessionData> SessionDataHandler::sessionData( unsigned int id ) const {
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return sessionDataInternal( id );
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}
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void SessionDataHandler::clear() {
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data.clear();
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}
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void SessionDataHandler::slotCollectGarbage() {
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const QMutexLocker locker( &mutex );
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unsigned int alive = 0;
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std::map< unsigned int, shared_ptr<SessionData> >::iterator it = data.begin(), end = data.end();
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while ( it != end )
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if ( it->second->ripe ) {
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data.erase( it++ );
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} else if ( !it->second->ref ) {
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it->second->ripe = true;
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++it;
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} else {
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++alive;
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++it;
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}
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if ( alive == data.size() )
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QMetaObject::invokeMethod( &timer, "stop", Qt::QueuedConnection );
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}
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