Time.hpp

/***************************************************************************
  tag: Peter Soetens  Wed Jan 18 14:11:39 CET 2006  Time.hpp 

                        Time.hpp -  description
                           -------------------
    begin                : Wed January 18 2006
    copyright            : (C) 2006 Peter Soetens
    email                : peter.soetens@mech.kuleuven.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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 ***************************************************************************/
 
 
#ifndef OS_TIME_HPP
#define OS_TIME_HPP

#include <cmath>

//rint function support implemented for MSVC
#include "rint.h"

namespace RTT
{ namespace OS {

    typedef double Seconds;
    typedef long secs;
    typedef long msecs;
    typedef long usecs;
    typedef long long nsecs;

    const long MSECS_IN_SECS = 1000;
    const long USECS_IN_SECS = 1000 * MSECS_IN_SECS;
    const long NSECS_IN_SECS = 1000 * USECS_IN_SECS;

    const long USECS_IN_MSECS = 1000;
    const long NSECS_IN_MSECS = 1000 * USECS_IN_MSECS;

    const long NSECS_IN_USECS = 1000;

    inline msecs secs_to_msecs(const secs s) { return s * MSECS_IN_SECS; }
    inline usecs secs_to_usecs(const secs s) { return s * USECS_IN_SECS; }
    inline nsecs secs_to_nsecs(const secs s) { return s * NSECS_IN_SECS; }

    inline usecs msecs_to_usecs(const msecs ms) { return ms * USECS_IN_MSECS; }
    inline nsecs msecs_to_nsecs(const msecs ms) { return ms * NSECS_IN_MSECS; }

    inline nsecs usecs_to_nsecs(const usecs us) { return us * NSECS_IN_USECS; }

    inline nsecs Seconds_to_nsecs(const Seconds s) { return nsecs( rint( s * secs_to_nsecs(1) ) ); }
    inline Seconds nsecs_to_Seconds(const nsecs ns) { return Seconds( ns ) / Seconds(NSECS_IN_SECS); }

}}

#endif