wallclocktimer.h

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/*                  This file is part of the class library                   */
/*       SoPlex --- the Sequential object-oriented simPlex.                  */
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/**@file  wallclocktimer.h
 * @brief WallclockTimer class.
 */
 
#ifndef _WALLCLOCK_TIMER_H_
#define _WALLCLOCK_TIMER_H_
 
#include "soplex/spxdefines.h"
#include "soplex/timer.h"
 
namespace soplex
{
 
class WallclockTimer : public Timer
{
private:
 
   //------------------------------------
   /**@name Data */
   ///@{
   mutable time_t sec;           ///< seconds
   mutable time_t usec;          ///< microseconds
 
   mutable Real lasttime;
   ///@}
 
   //------------------------------------
   /**@name Internal helpers */
   ///@{
   /// convert wallclock time to secounds.
   Real wall2sec(time_t s, time_t us) const
   {
      return (Real)s + 0.000001 * (Real)us;
   }
 
   ///@}
 
public:
 
   //------------------------------------
   /**@name Construction / destruction */
   ///@{
   /// default constructor
   WallclockTimer()
      : Timer(), sec(0), usec(0), lasttime(0.0)
   {}
   /// copy constructor
   WallclockTimer(const WallclockTimer& old)
      : Timer(), sec(old.sec), usec(old.usec), lasttime(old.lasttime)
   {}
   /// assignment operator
   WallclockTimer& operator=(const WallclockTimer& old)
   {
      sec = old.sec;
      usec = old.usec;
      lasttime = old.lasttime;
      return *this;
   }
 
   virtual ~WallclockTimer()
   {}
   ///@}
 
   //------------------------------------
   /**@name Control */
   ///@{
   /// initialize timer, set timing accounts to zero.
   virtual void reset()
   {
      status   = RESET;
      sec = usec = 0;
      lasttime = 0.0;
   }
 
   /// start timer, resume accounting user, system and real time.
   virtual void start();
 
   /// stop timer, return accounted user time.
   virtual Real stop();
 
   /// return type of timer
   virtual TYPE type()
   {
      return WALLCLOCK_TIME;
   }
   ///@}
 
   //------------------------------------
   /**@name Access */
   ///@{
   virtual Real time() const;
 
   virtual Real lastTime() const;
 
   ///@}
};
} // namespace soplex
#endif // _WALLCLOCK_TIMER_H_