qeglfskmseventreader_p.h

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// Copyright (C) 2019 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 QEGLFSKKMSEVENTREADER_H
#define QEGLFSKKMSEVENTREADER_H
 
//
//  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.
//
 
#include "private/qeglfsglobal_p.h"
#include <QObject>
#include <QThread>
#include <QMutex>
#include <QWaitCondition>
 
QT_BEGIN_NAMESPACE
 
class QEglFSKmsDevice;
 
struct QEglFSKmsEventHost : public QObject
{
    struct PendingFlipWait {
        void *key;
        QMutex *mutex;
        QWaitCondition *cond;
    };
 
    static const int MAX_FLIPS = 32;
    void *completedFlips[MAX_FLIPS] = {};
    QEglFSKmsEventHost::PendingFlipWait pendingFlipWaits[MAX_FLIPS] = {};
 
    bool event(QEvent *event) override;
    void updateStatus();
    void handlePageFlipCompleted(void *key);
};
 
class QEglFSKmsEventReaderThread : public QThread
{
public:
    QEglFSKmsEventReaderThread(int fd) : m_fd(fd) { }
    void run() override;
    QEglFSKmsEventHost *eventHost() { return &m_ev; }
 
private:
    int m_fd;
    QEglFSKmsEventHost m_ev;
};
 
class Q_EGLFS_EXPORT QEglFSKmsEventReader
{
public:
    ~QEglFSKmsEventReader();
 
    void create(QEglFSKmsDevice *device);
    void destroy();
 
    void startWaitFlip(void *key, QMutex *mutex, QWaitCondition *cond);
 
private:
    QEglFSKmsDevice *m_device = nullptr;
    QEglFSKmsEventReaderThread *m_thread = nullptr;
};
 
QT_END_NAMESPACE
 
#endif // QEGLFSKKMSEVENTREADER_H