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TimeStampedEvent.hh

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#ifndef TIME_STAMPED_EVENT_H
#define TIME_STAMPED_EVENT_H

template <typename IntType>
struct TimeStamper
{
    typedef IntType DataType;
    static IntType getTimeStamp();
    inline static bool leftOlder(IntType left, IntType right) {return left < right;}
};

template <typename IntType>
IntType 
TimeStamper<IntType>::getTimeStamp()
{
    static IntType stamp = 0;
    return ++ stamp;
}

typedef TimeStamper<unsigned long int> DefaultTimeStamper;

template <class Stamper = DefaultTimeStamper>
class TimeStampedEvent
{
    public:
        const typename Stamper::DataType& getTimeStamp() const {return _timeStamp;}
        
        bool isOlderThan(const TimeStampedEvent& tse) const 
        {
            return Stamper::leftOlder(_timeStamp, tse._timeStamp);
        }
        
        bool operator<(const TimeStampedEvent& tse) const {return isOlderThan(tse);}
        
    protected:
        TimeStampedEvent(): _timeStamp( Stamper::getTimeStamp() ) {}
        ~TimeStampedEvent() {}

    private: // data
        const typename Stamper::DataType _timeStamp;
};

#endif // TIME_STAMPED_EVENT_H

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