qautoresetevent_pipe_p.h

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// Copyright (C) 2024 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

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API.  It exists purely as an

// implementation detail.  This header file may change from version to

// version without notice, or even be removed.

//

// We mean it.

//

#ifndef QAUTORESETEVENT_PIPE_P_H

#define QAUTORESETEVENT_PIPE_P_H

#include <QtMultimedia/qtmultimediaexports.h>

#include <QtCore/qsocketnotifier.h>

#include <atomic>

QT_BEGIN_NAMESPACE

namespace QtPrivate {

class Q_MULTIMEDIA_EXPORT QAutoResetEventPipe final : public QObject

    Q_OBJECT

public:

    explicit QAutoResetEventPipe(QObject *parent = nullptr);

    ~QAutoResetEventPipe();

    Q_DISABLE_COPY_MOVE(QAutoResetEventPipe)

    bool isValid() const { return m_fdProducer != -1; }

    void set();

    template <typename... Args>

    QMetaObject::Connection callOnActivated(Args &&...args)

        return connect(this, &QAutoResetEventPipe::activated, std::forward<Args>(args)...);

    template <typename Functor>

    QMetaObject::Connection callOnActivated(Functor &&functor)

        return connect(this, &QAutoResetEventPipe::activated, this, std::forward<Functor>(functor));

Q_SIGNALS:

    void activated();

private:

    QSocketNotifier m_notifier;

    int m_fdProducer = -1;

    int m_fdConsumer = -1;

    std::atomic_flag m_consumePending{};

};

} // namespace QtPrivate

QT_END_NAMESPACE

#endif // QAUTORESETEVENT_PIPE_P_H