Reduction.hpp

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/*
 *  This file is part of AQUAgpusph, a free CFD program based on SPH.
 *  Copyright (C) 2012  Jose Luis Cercos Pita <jl.cercos@upm.es>
 *
 *  AQUAgpusph 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 3 of the License, or
 *  (at your option) any later version.
 *
 *  AQUAgpusph 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 AQUAgpusph.  If not, see <http://www.gnu.org/licenses/>.
 */

 
#ifndef REDUCTION_H_INCLUDED
#define REDUCTION_H_INCLUDED
 
#include <vector>
#include "CalcServer.hpp"
#include "Kernel.hpp"
 
namespace Aqua {
namespace CalcServer {

class Reduction : public Aqua::CalcServer::Tool
{
  public:
        Reduction(const std::string name,
                  const std::string input_name,
                  const std::string output_name,
                  const std::string operation,
                  const std::string null_val,
                  bool once = false);

        ~Reduction();

        void setup();

        inline size_t nSteps() const { return _global_work_sizes.size(); }

        inline cl_event getUserEvent() const { return _user_event; }
 
  protected:
        cl_event _execute(const std::vector<cl_event> events);
 
  private:
        void variables();

        void setupOpenCL();

        void setVariables();

        const std::string flags(const size_t local_size);

        std::string _input_name;
        std::string _output_name;
        std::string _operation;
        std::string _null_val;

        InputOutput::ArrayVariable* _input_var;
        InputOutput::Variable* _output_var;

        cl_mem _input;

        std::vector<cl_kernel> _kernels;

        std::vector<size_t> _global_work_sizes;
        std::vector<size_t> _local_work_sizes;
        std::vector<size_t> _number_groups;
        std::vector<size_t> _n;

        std::vector<cl_mem> _mems;

        cl_event _user_event;
};
 
}
} // namespace
 
#endif // REDUCTION_H_INCLUDED