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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.1, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QTCONCURRENT_RUNBASE_H
#define QTCONCURRENT_RUNBASE_H
#include <QtCore/qglobal.h>
#ifndef QT_NO_CONCURRENT
#include <QtCore/qfuture.h>
#include <QtCore/qrunnable.h>
#include <QtCore/qthreadpool.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(Core)
#ifndef qdoc
namespace QtConcurrent {
template <typename T>
struct SelectSpecialization
{
template <class Normal, class Void>
struct Type { typedef Normal type; };
};
template <>
struct SelectSpecialization<void>
{
template <class Normal, class Void>
struct Type { typedef Void type; };
};
template <typename T>
class RunFunctionTaskBase : public QFutureInterface<T> , public QRunnable
{
public:
QFuture<T> start()
{
this->setRunnable(this);
this->reportStarted();
QFuture<T> future = this->future();
QThreadPool::globalInstance()->start(this, /*m_priority*/ 0);
return future;
}
void run() {}
virtual void runFunctor() = 0;
};
template <typename T>
class RunFunctionTask : public RunFunctionTaskBase<T>
{
public:
void run()
{
if (this->isCanceled()) {
this->reportFinished();
return;
}
this->runFunctor();
this->reportResult(result);
this->reportFinished();
}
T result;
};
template <>
class RunFunctionTask<void> : public RunFunctionTaskBase<void>
{
public:
void run()
{
if (this->isCanceled()) {
this->reportFinished();
return;
}
this->runFunctor();
this->reportFinished();
}
};
} //namespace QtConcurrent
#endif //qdoc
QT_END_NAMESPACE
QT_END_HEADER
#endif // QT_NO_CONCURRENT
#endif
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