ReadTimestamp.h

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#pragma once
 
#include <QtCore/QIODevice>
 
#include "MonotonicClock.h"
 
class ReadTimestamp
{
public:
    static quint64 nowUs() { return MonotonicClock::nowUs(); }
 
    virtual ~ReadTimestamp() = default;
    virtual quint64 lastReadTimestampUs() const = 0;
 
    static quint64 from(const QIODevice* device, quint64 fallbackTimestampUs = nowUs())
    {
        const auto* timestamped = dynamic_cast<const ReadTimestamp*>(device);
        return timestamped ? timestamped->lastReadTimestampUs() : fallbackTimestampUs;
    }
};