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akonadi

dbusconnectionpool.cpp
00001 /*
00002  * Copyright (C) 2010 Sebastian Trueg <trueg@kde.org>
00003  * Copyright (C) 2010 David Faure <faure@kde.org>
00004  *
00005  * This library is free software; you can redistribute it and/or
00006  * modify it under the terms of the GNU Library General Public
00007  * License as published by the Free Software Foundation; either
00008  * version 2 of the License, or (at your option) any later version.
00009  *
00010  * This library is distributed in the hope that it will be useful,
00011  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00012  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013  * Library General Public License for more details.
00014  *
00015  * You should have received a copy of the GNU Library General Public License
00016  * along with this library; see the file COPYING.LIB.  If not, write to
00017  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00018  * Boston, MA 02110-1301, USA.
00019  */
00020 
00021 #include "dbusconnectionpool.h"
00022 #include <QCoreApplication>
00023 #include <QThread>
00024 #include <QThreadStorage>
00025 
00026 namespace {
00027 QAtomicInt s_connectionCounter;
00028 
00029 class DBusConnectionPoolPrivate
00030 {
00031 public:
00032     DBusConnectionPoolPrivate()
00033         : m_connection( QDBusConnection::connectToBus(
00034                             QDBusConnection::SessionBus,
00035                             QString::fromLatin1("AkonadiKde%1").arg(newNumber()) ) )
00036     {
00037     }
00038     ~DBusConnectionPoolPrivate() {
00039         QDBusConnection::disconnectFromBus( m_connection.name() );
00040     }
00041 
00042     QDBusConnection connection() const { return m_connection; }
00043 
00044 private:
00045     static int newNumber() {
00046         return s_connectionCounter.fetchAndAddAcquire(1);
00047     }
00048     QDBusConnection m_connection;
00049 };
00050 }
00051 
00052 QThreadStorage<DBusConnectionPoolPrivate *> s_perThreadConnection;
00053 
00054 QDBusConnection Akonadi::DBusConnectionPool::threadConnection()
00055 {
00056     if ( !QCoreApplication::instance() || QCoreApplication::instance()->thread() == QThread::currentThread() )
00057         return QDBusConnection::sessionBus(); // main thread, use the default session bus, breaks unported resources otherwise
00058     if (!s_perThreadConnection.hasLocalData()) {
00059         s_perThreadConnection.setLocalData(new DBusConnectionPoolPrivate);
00060     }
00061     return s_perThreadConnection.localData()->connection();
00062 }
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