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