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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qrunnable.h"
QT_BEGIN_NAMESPACE
QRunnable::~QRunnable()
{
}
/*!
\class QRunnable
\inmodule QtCore
\since 4.4
\brief The QRunnable class is the base class for all runnable objects.
\ingroup thread
The QRunnable class is an interface for representing a task or
piece of code that needs to be executed, represented by your
reimplementation of the run() function.
You can use QThreadPool to execute your code in a separate
thread. QThreadPool deletes the QRunnable automatically if
autoDelete() returns \c true (the default). Use setAutoDelete() to
change the auto-deletion flag.
QThreadPool supports executing the same QRunnable more than once
by calling QThreadPool::tryStart(this) from within the run() function.
If autoDelete is enabled the QRunnable will be deleted when
the last thread exits the run function. Calling QThreadPool::start()
multiple times with the same QRunnable when autoDelete is enabled
creates a race condition and is not recommended.
\sa QThreadPool
*/
/*! \fn QRunnable::run()
Implement this pure virtual function in your subclass.
*/
/*! \fn QRunnable::QRunnable()
Constructs a QRunnable. Auto-deletion is enabled by default.
\sa autoDelete(), setAutoDelete()
*/
/*! \fn QRunnable::~QRunnable()
QRunnable virtual destructor.
*/
/*! \fn bool QRunnable::autoDelete() const
Returns \c true is auto-deletion is enabled; false otherwise.
If auto-deletion is enabled, QThreadPool will automatically delete
this runnable after calling run(); otherwise, ownership remains
with the application programmer.
\sa setAutoDelete(), QThreadPool
*/
/*! \fn bool QRunnable::setAutoDelete(bool autoDelete)
Enables auto-deletion if \a autoDelete is true; otherwise
auto-deletion is disabled.
If auto-deletion is enabled, QThreadPool will automatically delete
this runnable after calling run(); otherwise, ownership remains
with the application programmer.
Note that this flag must be set before calling
QThreadPool::start(). Calling this function after
QThreadPool::start() results in undefined behavior.
\sa autoDelete(), QThreadPool
*/
class FunctionRunnable : public QRunnable
{
std::function<void()> m_functionToRun;
public:
FunctionRunnable(std::function<void()> functionToRun) : m_functionToRun(std::move(functionToRun))
{
}
void run() override
{
m_functionToRun();
}
};
/*!
\since 5.15
Creates a QRunnable that calls \a functionToRun in run().
Auto-deletion is enabled by default.
\sa run(), autoDelete()
*/
QRunnable *QRunnable::create(std::function<void()> functionToRun)
{
return new FunctionRunnable(std::move(functionToRun));
}
QT_END_NAMESPACE
|
