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