#ifndef TIMESTAT_HH
#define TIMESTAT_HH

#include <iostream>
#include <list>
#include <string>

#include <cctk.h>

#include <cycleclock.h>
#ifndef HAVE_TICK_COUNTER
typedef int ticks;
inline ticks getticks() { return 0; }
inline double seconds_per_tick(void) { return 0.0; }
inline void measure_tick(void) {}
#endif



namespace CarpetLib {
  
  using namespace std;
  
  
  
  class Timer;
  
  
  
  // A set of timers
  class TimerSet {
    
    list <Timer *> timers;
    
  public:
    
    // Add a timer
    void
    add (Timer * timer);
    
    // Remove a timer
    void
    remove (Timer * timer);
    
    // Output all timer names
    void
    outputNames (ostream & os)
      const;
    
    // Output all timer data
    void
    outputData (ostream & os)
      const;
    
  }; // class TimerSet
  
  inline
  ostream & operator << (ostream & os,
                         TimerSet const & timerSet)
  {
    timerSet.outputData (os);
    return os;
  }
  
  
  
  // A timer, which counts time (in seconds) spent in and amount (in
  // bytes) used in various operations
  class Timer {
    
    string timername;
    
  public:
    
    // Create a new timer with the given name
    Timer (char const * timername_);
    
    // Destroy a timer
    ~Timer ();
    
  private:
    
    // Reset the statistics
    void
    resetstats ();
    
    // Add statistics of a timing operation
    void
    addstat (double t,
             double b);
    
  private:
    
    double wtime;
    double wtime2;
    double wmin;
    double wmax;
    
    double bytes;
    double bytes2;
    double bmin;
    double bmax;
    
    double count;

    bool running;
    ticks starttime;
    
  public:
    
    // Start the timer
    void
    start ();
    
    // Stop the timer
    void
    stop (double b);
    
    // Reset the timer
    void
    reset ();
    
    // Timer name
    string
    name ()
      const CCTK_MEMBER_ATTRIBUTE_PURE;
    
    // Print timer data
    void
    outputData (ostream & os)
      const;
    
  };
  
  inline
  ostream & operator << (ostream & os,
                         Timer const & timer)
  {
    timer.outputData (os);
    return os;
  }
  
} // namespace CarpetLib

#endif  // TIMESTAT_HH