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/***************************************************************************
* Copyright (C) 2009 by Peter Penz <[email protected]> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
***************************************************************************/
#include "updateitemstatesthread.h"
#include <QMutexLocker>
UpdateItemStatesThread::UpdateItemStatesThread() :
QThread(),
m_globalPluginMutex(0),
m_plugin(0),
m_itemMutex(),
m_retrievedItems(false),
m_itemStates()
{
// Several threads may share one instance of a plugin. A global
// mutex is required to serialize the retrieval of version control
// states inside run().
static QMutex globalMutex;
m_globalPluginMutex = &globalMutex;
}
UpdateItemStatesThread::~UpdateItemStatesThread()
{
}
void UpdateItemStatesThread::setData(KVersionControlPlugin* plugin,
const QList<VersionControlObserver::ItemState>& itemStates)
{
QMutexLocker itemLocker(&m_itemMutex);
m_itemStates = itemStates;
QMutexLocker pluginLocker(m_globalPluginMutex);
m_plugin = plugin;
}
void UpdateItemStatesThread::run()
{
Q_ASSERT(!m_itemStates.isEmpty());
Q_ASSERT(m_plugin != 0);
// The items from m_itemStates may be located in different directory levels. The version
// plugin requires the root directory for KVersionControlPlugin::beginRetrieval(). Instead
// of doing an expensive search, we utilize the knowledge of the implementation of
// VersionControlObserver::addDirectory() to be sure that the last item contains the root.
QMutexLocker itemLocker(&m_itemMutex);
const QString directory = m_itemStates.last().item.url().directory(KUrl::AppendTrailingSlash);
itemLocker.unlock();
QMutexLocker pluginLocker(m_globalPluginMutex);
m_retrievedItems = false;
if (m_plugin->beginRetrieval(directory)) {
itemLocker.relock();
const int count = m_itemStates.count();
for (int i = 0; i < count; ++i) {
m_itemStates[i].version = m_plugin->versionState(m_itemStates[i].item);
}
m_plugin->endRetrieval();
m_retrievedItems = true;
}
}
bool UpdateItemStatesThread::lockPlugin()
{
return m_globalPluginMutex->tryLock(300);
}
void UpdateItemStatesThread::unlockPlugin()
{
m_globalPluginMutex->unlock();
}
QList<VersionControlObserver::ItemState> UpdateItemStatesThread::itemStates() const
{
QMutexLocker locker(&m_itemMutex);
return m_itemStates;
}
bool UpdateItemStatesThread::retrievedItems() const
{
QMutexLocker locker(&m_itemMutex);
return m_retrievedItems;
}
#include "updateitemstatesthread.moc"
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