tbb/map.h

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/*
* @version    GrPPI v0.2
* @copyright    Copyright (C) 2017 Universidad Carlos III de Madrid. All rights reserved.
* @license    GNU/GPL, see LICENSE.txt
* 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 3 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 have received a copy of the GNU General Public License in LICENSE.txt
* also available in <http://www.gnu.org/licenses/gpl.html>.
*
* See COPYRIGHT.txt for copyright notices and details.
*/

#ifndef GRPPI_TBB_MAP_H
#define GRPPI_TBB_MAP_H

#ifdef GRPPI_TBB

#include "parallel_execution_tbb.h"

#include <tbb/tbb.h>

namespace grppi {

template <typename InputIt, typename OutputIt, typename Transformer>
void map(parallel_execution_tbb & ex, 
         InputIt first, InputIt last, 
         OutputIt first_out, 
         Transformer && transf_op)
{
  tbb::parallel_for(
    static_cast<std::size_t>(0), 
    static_cast<std::size_t>((last-first)), 
    [&] (std::size_t index){
      auto current = (first_out+index);
      *current = transf_op(*(first+index));
    }
  );   
}

template <typename InputIt, typename OutputIt, 
          typename Transformer,
          typename ... OtherInputIts>
void map(parallel_execution_tbb & ex, 
         InputIt first, InputIt last, OutputIt first_out, 
         Transformer && transf_op, 
         OtherInputIts ... more_firsts)
{
  tbb::parallel_for(
    static_cast<std::size_t>(0),
    static_cast<std::size_t>((last-first)), 
    [&] (std::size_t index){
      auto current = (first_out+index);
      *current = transf_op(*(first+index), *(more_firsts+index)...);
    }
 );   

}

}

#endif

#endif