ConditionExpire.hpp

/***************************************************************************
  tag: Peter Soetens  Thu Oct 10 16:16:57 CEST 2002  ConditionExpire.hpp

                        ConditionExpire.hpp -  description
                           -------------------
    begin                : Thu October 10 2002
    copyright            : (C) 2002 Peter Soetens
    email                : peter.soetens@mech.kuleuven.ac.be

 ***************************************************************************
 *   This library is free software; you can redistribute it and/or         *
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 *   version 2 of the License.                                             *
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 *   Public License.                                                       *
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 ***************************************************************************/


#ifndef CONDITIONEXPIRE_HPP
#define CONDITIONEXPIRE_HPP

#include "ConditionInterface.hpp"
#include "TimeService.hpp"

namespace RTT
{
    class RTT_API ConditionExpire
        : public ConditionInterface
    {
        typedef TimeService::ticks ticks;

    public:
        ConditionExpire( ticks t )
            : time( t ), hb( TimeService::Instance() )
        {
            timestamp = hb->getTicks();
        }

        virtual ~ConditionExpire()
        {}

        virtual bool evaluate()
        {
            return ( time > hb->ticksSince(timestamp) );
        }

        virtual void reset()
        {
            timestamp = hb->getTicks();
        }

        virtual ConditionInterface* clone() const
        {
            return new ConditionExpire( time );
        }

    private:
        ticks time;
        ticks timestamp;
        TimeService *hb;
    };

}

#endif