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