src/views/versioncontrol/updateitemstatesthread.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2009 by Peter Penz <peter.penz19@gmail.com>             *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  18  ***************************************************************************/
  19
  20 #include "updateitemstatesthread.h"
  21
  22 #include <kversioncontrolplugin2.h>
  23
  24 #include <QMutexLocker>
  25
  26 UpdateItemStatesThread::UpdateItemStatesThread(KVersionControlPlugin* plugin,
  27                                                const QMap<QString, QVector<VersionControlObserver::ItemState> >& itemStates) :
  28     QThread(),
  29     m_globalPluginMutex(0),
  30     m_plugin(plugin),
  31     m_retrievedItems(false),
  32     m_itemStates(itemStates)
  33 {
  34     // Several threads may share one instance of a plugin. A global
  35     // mutex is required to serialize the retrieval of version control
  36     // states inside run().
  37     static QMutex globalMutex;
  38     m_globalPluginMutex = &globalMutex;
  39 }
  40
  41 UpdateItemStatesThread::~UpdateItemStatesThread()
  42 {
  43 }
  44
  45 void UpdateItemStatesThread::run()
  46 {
  47     Q_ASSERT(!m_itemStates.isEmpty());
  48     Q_ASSERT(m_plugin);
  49
  50     m_retrievedItems = false;
  51
  52     QMutexLocker pluginLocker(m_globalPluginMutex);
  53     QMap<QString, QVector<VersionControlObserver::ItemState> >::iterator it = m_itemStates.begin();
  54     for (; it != m_itemStates.end(); ++it) {
  55         if (m_plugin->beginRetrieval(it.key())) {
  56             QVector<VersionControlObserver::ItemState>& items = it.value();
  57             const int count = items.count();
  58
  59             KVersionControlPlugin2* pluginV2 = qobject_cast<KVersionControlPlugin2*>(m_plugin);
  60             if (pluginV2) {
  61                 for (int i = 0; i < count; ++i) {
  62                     items[i].version = pluginV2->itemVersion(items[i].item);
  63                 }
  64             } else {
  65                 for (int i = 0; i < count; ++i) {
  66                     const KVersionControlPlugin::VersionState state = m_plugin->versionState(items[i].item);
  67                     items[i].version = static_cast<KVersionControlPlugin2::ItemVersion>(state);
  68                 }
  69             }
  70
  71             m_plugin->endRetrieval();
  72             m_retrievedItems = true;
  73         }
  74     }
  75 }
  76
  77 bool UpdateItemStatesThread::lockPlugin()
  78 {
  79     return m_globalPluginMutex->tryLock(300);
  80 }
  81
  82 void UpdateItemStatesThread::unlockPlugin()
  83 {
  84     m_globalPluginMutex->unlock();
  85 }
  86
  87 QMap<QString, QVector<VersionControlObserver::ItemState> > UpdateItemStatesThread::itemStates() const
  88 {
  89     return m_itemStates;
  90 }
  91
  92 bool UpdateItemStatesThread::retrievedItems() const
  93 {
  94     return m_retrievedItems;
  95 }
  96
  97 #include "updateitemstatesthread.moc"