profiler.h

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/***************************************************************************
 *   Copyright (C) 2008 by Kutumov Alexey                                  *
 *   ru.pixel@gmail.com                                                    *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

#ifndef __profiler__header__
#define __profiler__header__

#include "gpucalc/singleton.h"
#include "gpucalc/timer.h"

namespace gpucalc
{

 const char _ProfilerName [] = "Profiler";


 class _GpuCalcExport Profiler: public Singleton<Profiler>
 {


  OBJ_DISABLE_COPY(Profiler)
  
  
  public:

   Profiler(): Singleton<Profiler>(_ProfilerName)
   {
   }
   

   ~Profiler()
   {
   }


   void beginProfile(const std::string & where)
   {
    if (!addToContainer(std::make_pair(Timer::getSingleton().getTime(), -1.0), where, mProfileMap))
    {
     Warning<ERR_DUPLICATE_ITEM>(this, "Profile label \"" + where + "\" already exists. Profiling does not start.", "Profiler::beginProfile()", __FILE__, __LINE__);
    }
   }

   
   void endProfile(const std::string & where)
   {
    double stop = Timer::getSingleton().getTime();

    ProfileMap::iterator i = mProfileMap.find(where);
    if (i == mProfileMap.end())
    {
     Warning<ERR_ITEM_NOT_FOUND>(this, "Profile label \"" + where + "\" cannot be found.", "Profiler::endProfile()", __FILE__, __LINE__);
    }
    else
    {
     i->second.second = stop;// = std::make_pair(i->second.first, stop);
    }
   }
   
   static Profiler & getSingleton();

   
   static Profiler * getSingletonPtr();


   double getProfilingTime(const std::string & where)
   {
    ProfileMap::iterator i = mProfileMap.find(where);
    if (i == mProfileMap.end())
    {
     Warning<ERR_ITEM_NOT_FOUND>(this, "Profile label \"" + where + "\" cannot be found.", "Profiler::endProfile()", __FILE__, __LINE__);
     return -1.0;
    }
    else
    {
     if (i->second.second > 0.0)
     {
      double result = i->second.second - i->second.first;
      mProfileMap.erase(i);
      return result;
     }
     else
     {
      Except<ERR_INVALID_STATE>(this, "Profiling \"" + where + "\" is not stopped yet.", "Profiler::getProfilingTime()", __FILE__, __LINE__);
      return -1.0;
     }
    }
   }

  private:

   typedef std::pair<double, double> ProfileEntry;
   typedef std::map<std::string, ProfileEntry> ProfileMap;
   ProfileMap mProfileMap; 


 };
}
#endif