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141 lines
3.7 KiB
C++
141 lines
3.7 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Copyright (C) 2016-2019 Ivailo Monev
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**
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** This file is part of the QtCore module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** As a special exception, The Qt Company gives you certain additional
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** rights. These rights are described in The Qt Company LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QTCONCURRENT_RUNBASE_H
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#define QTCONCURRENT_RUNBASE_H
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#include <QtCore/qglobal.h>
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#ifndef QT_NO_CONCURRENT
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#include <QtCore/qfuture.h>
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#include <QtCore/qrunnable.h>
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#include <QtCore/qthreadpool.h>
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QT_BEGIN_HEADER
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QT_BEGIN_NAMESPACE
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namespace QtConcurrent {
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template <typename T>
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struct SelectSpecialization
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{
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template <class Normal, class Void>
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struct Type { typedef Normal type; };
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};
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template <>
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struct SelectSpecialization<void>
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{
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template <class Normal, class Void>
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struct Type { typedef Void type; };
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};
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template <typename T>
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class RunFunctionTaskBase : public QFutureInterface<T> , public QRunnable
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{
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public:
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QFuture<T> start()
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{
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this->setRunnable(this);
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this->reportStarted();
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QFuture<T> future = this->future();
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QThreadPool::globalInstance()->start(this, /*m_priority*/ 0);
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return future;
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}
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void run() {}
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virtual void runFunctor() = 0;
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};
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template <typename T>
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class RunFunctionTask : public RunFunctionTaskBase<T>
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{
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public:
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void run()
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{
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if (this->isCanceled()) {
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this->reportFinished();
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return;
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}
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#ifndef QT_NO_EXCEPTIONS
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try {
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#endif
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this->runFunctor();
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#ifndef QT_NO_EXCEPTIONS
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} catch (QtConcurrent::Exception &e) {
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QFutureInterface<T>::reportException(e);
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} catch (...) {
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QFutureInterface<T>::reportException(QtConcurrent::UnhandledException());
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}
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#endif
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this->reportResult(result);
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this->reportFinished();
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}
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T result;
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};
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template <>
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class RunFunctionTask<void> : public RunFunctionTaskBase<void>
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{
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public:
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void run()
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{
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if (this->isCanceled()) {
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this->reportFinished();
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return;
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}
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#ifndef QT_NO_EXCEPTIONS
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try {
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#endif
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this->runFunctor();
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#ifndef QT_NO_EXCEPTIONS
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} catch (QtConcurrent::Exception &e) {
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QFutureInterface<void>::reportException(e);
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} catch (...) {
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QFutureInterface<void>::reportException(QtConcurrent::UnhandledException());
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}
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#endif
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this->reportFinished();
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}
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};
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} //namespace QtConcurrent
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QT_END_NAMESPACE
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QT_END_HEADER
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#endif // QT_NO_CONCURRENT
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#endif
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