diff -r 3fec62e6e7fc -r 90fe62538f66 controlpanelui/src/cpcategorymodel/src/cptaskexecutor.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/controlpanelui/src/cpcategorymodel/src/cptaskexecutor.cpp	Tue Aug 31 15:15:28 2010 +0300
@@ -0,0 +1,140 @@
+/*
+* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0""
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:  
+*
+*/
+#include "cptaskexecutor.h"
+#include <QMutexLocker>
+#include <QDebug>
+#include <QtAlgorithms>
+#include <QPointer>
+
+static QPointer<CpTaskExecutor> g_instance;
+
+CpTaskExecutor *CpTaskExecutor::globalInstance()
+{
+    if (!g_instance) {
+        g_instance = new CpTaskExecutor();
+    }
+    return g_instance.data();
+}
+    
+void CpTaskExecutor::destroyGlobalInstance()
+{
+    delete g_instance.data();
+}
+
+CpTaskExecutor::CpTaskExecutor(QObject *parent /*=0*/) 
+: QThread(parent), mStopped(false)
+{
+}
+
+CpTaskExecutor::~CpTaskExecutor()
+{
+    stop();
+}
+
+bool CpTaskExecutor::runTask(CpTask *task,bool append /*= false*/)
+{
+    if (mStopped) {
+        if (isRunning()) {
+            qDebug() << "thread in stopping process...can not run task.\r\n";
+            return false;
+        }
+        mStopped = false;
+    }
+
+    if (task) {
+        {
+            QMutexLocker locker(&mMutex);
+            if (append) {
+                mTasks.append(task);
+            }
+            else {
+                mTasks.insert(0,task);
+            }
+        }
+
+        if (!isRunning()) {
+            qDebug() << "isRunning() == false, call start()\r\n";
+            start();
+        }
+    }
+
+    return true;
+}
+
+void CpTaskExecutor::stop()
+{
+    if (!mStopped && isRunning() ) {
+       mStopped = true;
+       removeTasks();
+       wait(); //wait for finished
+    }
+}
+
+void CpTaskExecutor::removeTasks()
+{
+    QMutexLocker locker(&mMutex);
+    
+    QList<CpTask*>::const_iterator begin(mTasks.begin());
+    QList<CpTask*>::const_iterator end(mTasks.end());
+    for (; begin != end; ++begin) {
+        if ((*begin)->autoDelete()) {
+            delete (*begin);
+        }
+    }
+
+    mTasks.clear();
+}
+
+void CpTaskExecutor::run()
+{
+    while (!mStopped) {
+        CpTask *task = 0;
+        {
+            QMutexLocker locker(&mMutex);
+            if (mTasks.isEmpty()) {
+                break;
+            }
+            task = mTasks.takeFirst();
+        }
+        try {
+            task->execute(&mStopped);
+            task->complete(&mStopped);
+        }catch(...) {
+            qDebug() << "excetion occur when running task\r\n";           
+        }
+
+        if (task->autoDelete()) {
+            delete task;
+        }
+    }
+}
+
+bool CpTaskExecutor::toFront(CpTask *task)
+{
+    QMutexLocker locker(&mMutex);
+    QList<CpTask*>::iterator foundIterator = ::qFind(mTasks.begin(),mTasks.end(),task);
+    if (foundIterator == mTasks.end()) {
+        return false;
+    }
+    
+    mTasks.erase(foundIterator);
+    mTasks.insert(0,task);
+
+    return true;
+}
+
+//End of File