Timer.hh

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\*===========================================================================*/

#ifndef TIMER_HH
#define TIMER_HH
// ----------------------------------------------------------------------------

// ----------------------------------------------------------------------------

#include <OpenMesh/Core/System/config.hh>
//
#include <ostream>
#include <string>
#if defined(OM_CC_MIPS)
#  include <assert.h>
#else
#  include <cassert>
#endif


// ------------------------------------------------------------- namespace ----

namespace OpenMesh {
namespace Utils {


// -------------------------------------------------------------- forwards ----


class TimerImpl;


// ----------------------------------------------------------------- class ----

class OPENMESHDLLEXPORT Timer
{
public:

  enum Format {
    Automatic,
    Long,
    Hours,
    Minutes,
    Seconds,
    HSeconds,
    MSeconds,
    MicroSeconds,
    NanoSeconds
  };

  Timer(void);
  ~Timer(void);

  bool is_valid() const { return state_!=Invalid; }

  bool is_stopped() const { return state_==Stopped; }

  void reset(void);

  void start(void);

  void stop(void);

  void cont(void);

  float resolution() const;
    
  double seconds(void) const;

  double hseconds(void) const { return seconds()*1e2; }

  double mseconds(void) const { return seconds()*1e3; }

  double useconds(void) const { return seconds()*1e6; }
  
  std::string as_string(Format format = Automatic);
  
  static std::string as_string(double seconds, Format format = Automatic);

public:

  bool operator < (const Timer& t2) const 
  { 
    assert( is_stopped() && t2.is_stopped() ); 
    return (seconds() < t2.seconds()); 
  }

  bool operator > (const Timer& t2) const
  { 
    assert( is_stopped() && t2.is_stopped() ); 
    return (seconds() > t2.seconds()); 
  }

  bool operator == (const Timer& t2) const
  { 
    assert( is_stopped() && t2.is_stopped() ); 
    return (seconds() == t2.seconds()); 
  }

  bool operator <= (const Timer& t2) const
  {
    assert( is_stopped() && t2.is_stopped() ); 
    return (seconds() <= t2.seconds()); 
  }

  bool operator >=(const Timer& t2) const
  { 
    assert( is_stopped() && t2.is_stopped() ); 
    return (seconds() >= t2.seconds()); 
  }

protected:

  TimerImpl *impl_;

  enum {
    Invalid = -1,
    Stopped =  0,
    Running =  1
  } state_;

};


inline std::ostream& operator << (std::ostream& _o, const Timer& _t)
{
   return (_o << _t.seconds());
}


// ============================================================================
} // END_NS_UTILS
} // END_NS_OPENMESH
// ============================================================================
#endif
// end of Timer.hh
// ===========================================================================