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/***************************************************************************
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* Copyright (C) 2009 by Peter Penz <peter.penz@gmx.at> *
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* This program 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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* This program 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 *
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* GNU 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 *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
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***************************************************************************/
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#include "updateitemstatesthread.h"
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#include <QMutexLocker>
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UpdateItemStatesThread::UpdateItemStatesThread() :
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m_globalPluginMutex(0),
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m_retrievedItems(false),
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// Several threads may share one instance of a plugin. A global
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// mutex is required to serialize the retrieval of version control
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// states inside run().
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static QMutex globalMutex;
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m_globalPluginMutex = &globalMutex;
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UpdateItemStatesThread::~UpdateItemStatesThread()
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void UpdateItemStatesThread::setData(KVersionControlPlugin* plugin,
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const QList<VersionControlObserver::ItemState>& itemStates)
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QMutexLocker itemLocker(&m_itemMutex);
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m_itemStates = itemStates;
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QMutexLocker pluginLocker(m_globalPluginMutex);
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void UpdateItemStatesThread::run()
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Q_ASSERT(!m_itemStates.isEmpty());
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Q_ASSERT(m_plugin != 0);
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// The items from m_itemStates may be located in different directory levels. The version
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// plugin requires the root directory for KVersionControlPlugin::beginRetrieval(). Instead
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// of doing an expensive search, we utilize the knowledge of the implementation of
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// VersionControlObserver::addDirectory() to be sure that the last item contains the root.
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QMutexLocker itemLocker(&m_itemMutex);
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const QString directory = m_itemStates.last().item.url().directory(KUrl::AppendTrailingSlash);
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QMutexLocker pluginLocker(m_globalPluginMutex);
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m_retrievedItems = false;
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if (m_plugin->beginRetrieval(directory)) {
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const int count = m_itemStates.count();
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for (int i = 0; i < count; ++i) {
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m_itemStates[i].version = m_plugin->versionState(m_itemStates[i].item);
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m_plugin->endRetrieval();
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m_retrievedItems = true;
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bool UpdateItemStatesThread::lockPlugin()
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return m_globalPluginMutex->tryLock(300);
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void UpdateItemStatesThread::unlockPlugin()
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m_globalPluginMutex->unlock();
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QList<VersionControlObserver::ItemState> UpdateItemStatesThread::itemStates() const
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QMutexLocker locker(&m_itemMutex);
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bool UpdateItemStatesThread::retrievedItems() const
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QMutexLocker locker(&m_itemMutex);
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return m_retrievedItems;
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#include "updateitemstatesthread.moc"