gmLogTime.h

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/************************************************************************
**
** Copyright (C) 2014 by Carlos Augusto Teixera Mendes
** All rights reserved.
**
** This file is part of the "GeMA" software. It's use should respect
** the terms in the license agreement that can be found together 
** with this source code.
** It is provided AS IS, with NO WARRANTY OF ANY KIND, 
** INCLUDING THE WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR 
** A PARTICULAR PURPOSE.
**
************************************************************************/
 
#ifndef _GEMA_LOG_TIME_H_
#define _GEMA_LOG_TIME_H_
 
#include "gmLog.h"
#include <QElapsedTimer>
 
 
class GMC_API_EXPORT GmTimeMsg
{
public:
  GmTimeMsg(const GmLogCategory& logger, QString msg) : _logger(logger), _msg(msg) 
  {
    if(logger.isEnabled(GM_TIME))
    {
      _timer.start();
      _nestLevel++;
    }
  }
 
  ~GmTimeMsg()
  {
    if(_logger.isEnabled(GM_TIME))
    {
      qint64 t  = _timer.elapsed();
      double ts = t / 1000.0;
      QString aux;
      if(ts >= 100 || ts <= 0.01)
        aux = QString(" (%1)").arg(formatTime(ts, _secondIndex));
      gmTimeMsg(_logger, QObject::tr("%1 [%2] finished in %3 s%4").arg(_msg).arg(_nestLevel).arg(ts).arg(aux));
      _nestLevel--;
    }
  }
 
  qint64 elapsed() const { return _timer.elapsed(); }
 
  static QString formatTime(double time, QString unit,  bool useConstSizeUnit = false);
  static QString formatTime(double time, int unitIndex, bool useConstSizeUnit = false);
 
  static int unitIndex(QString unit) { return _timeUnits.indexOf(unit); }
  
  static QString indexFmtUnit(int unitIndex) { return _fmtTimeUnits[unitIndex]; }
 
private:
  static int  _nestLevel;  
 
  static const QStringList     _timeUnits;     
  static const QStringList     _fmtTimeUnits;  
  static const QVector<double> _timeFactors;   
  static const int             _secondIndex;   
 
  QElapsedTimer        _timer;  
  const GmLogCategory& _logger; 
  QString              _msg;    
};
 
class GmTimeAdder
{
public:
  GmTimeAdder(qint64* counter) : _counter(counter)
  {
    _timer.start();
  }
  ~GmTimeAdder()
  {
    *_counter += _timer.nsecsElapsed();
  }
 
private:
  QElapsedTimer _timer;   
  qint64*       _counter; 
};
 
#endif