qt-everywhere-src-5.14.1/qtbase/src/corelib/thread/qrunnable.cpp

/****************************************************************************
**
** 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()
{
    // Must be empty until ### Qt 6
}

/*!
    \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
*/

QT_END_NAMESPACE