qohoseventdispatcher.h

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// Copyright (C) 2025 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QOHOSEVENTDISPATCHER_H
#define QOHOSEVENTDISPATCHER_H
 
#include <QtCore/qmutex.h>
#include <QtCore/qsemaphore.h>
#include <QtGui/private/qunixeventdispatcher_qpa_p.h>
 
class QOhosEventDispatcher : public QUnixEventDispatcherQPA
{
    Q_OBJECT
public:
    explicit QOhosEventDispatcher(QObject *parent = 0);
    ~QOhosEventDispatcher();
    void start();
    void stop();
 
    void goingToStop(bool stop);
 
protected:
    bool processEvents(QEventLoop::ProcessEventsFlags flags) override;
 
private:
    QAtomicInt m_stopRequest;
    QAtomicInteger<bool> m_goingToStop;
    QSemaphore m_semaphore;
};
 
class QOhosEventDispatcherStopper
{
public:
    static QOhosEventDispatcherStopper *instance();
    static bool stopped() {return !instance()->m_started.loadRelaxed(); }
    void startAll();
    void stopAll();
    void addEventDispatcher(QOhosEventDispatcher *dispatcher);
    void removeEventDispatcher(QOhosEventDispatcher *dispatcher);
    void goingToStop(bool stop);
 
private:
    QMutex m_mutex;
    QAtomicInt m_started = 1;
    QVector<QOhosEventDispatcher *> m_dispatchers;
};
 
 
#endif // QOHOSEVENTDISPATCHER_H