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/* vim:set ts=3 sw=3 sts=3 et: */
#ifndef MOOST_THREAD_XTIME_UTIL_HPP__
#define MOOST_THREAD_XTIME_UTIL_HPP__

#include <boost/thread/xtime.hpp>

namespace moost { namespace thread {

struct xtime_util
{
  static const int NSECS_PER_SEC = 1000000000;
  static const int NSECS_PER_MILLISEC = 1000000;


  static boost::xtime now()
  {
    boost::xtime ret_val;
    xtime_get(&ret_val, boost::TIME_UTC);

    return ret_val;
  }

  static boost::xtime add_ms(const boost::xtime & time, int milliseconds)
  {
    boost::xtime ret_val;

    if ( milliseconds < NSECS_PER_SEC / NSECS_PER_MILLISEC )
    {
       ret_val.sec  = time.sec;
       ret_val.nsec = time.nsec + milliseconds * NSECS_PER_MILLISEC;
    }
    else
    {
       ret_val.sec  = time.sec + milliseconds / 1000;
       ret_val.nsec = time.nsec + milliseconds % NSECS_PER_SEC;
    }

    if (ret_val.nsec >= NSECS_PER_SEC)
    {
      ret_val.sec += ret_val.nsec / NSECS_PER_SEC;
      ret_val.nsec = ret_val.nsec % NSECS_PER_SEC;
    }

    return ret_val;
  }

  static boost::xtime add_sec(const boost::xtime & time, int seconds)
  {
    boost::xtime ret_val;

    ret_val.sec = time.sec + seconds;
    ret_val.nsec = time.nsec;

    return ret_val;
  }
};

}} // moost::thread

#endif // MOOST_THREAD_XTIME_UTIL_HPP__