/*
  <moCudaEval.h>
  Copyright (C) DOLPHIN Project-Team, INRIA Lille - Nord Europe, 2006-2010

  Karima Boufaras, Thé Van LUONG

  This software is governed by the CeCILL license under French law and
  abiding by the rules of distribution of free software.  You can  use,
  modify and/ or redistribute the software under the terms of the CeCILL
  license as circulated by CEA, CNRS and INRIA at the following URL
  "http://www.cecill.info".

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*/

#ifndef moCudaEval_H
#define moCudaEval_H
#include <eval/moEval.h>

/**
 * Abstract class for evaluation on GPU
 */

template<class Neighbor>
class moCudaEval: public moEval<Neighbor> {

public:

	/**
	 * Define type of a solution corresponding to Neighbor
	 */
	typedef typename Neighbor::EOT EOT;

	typedef typename EOT::Fitness Fitness;

	/**
	 * Constructor
	 * @param _neighborhoodSize the size of the neighborhood
	 */

	moCudaEval(unsigned int _neighborhoodSize) {

		neighborhoodSize = _neighborhoodSize;
		host_FitnessArray = new Fitness[neighborhoodSize];
		cudaMalloc((void**) &device_FitnessArray, neighborhoodSize
				* sizeof(Fitness));
		kernel_Dim = neighborhoodSize / BLOCK_SIZE + ((neighborhoodSize
				% BLOCK_SIZE == 0) ? 0 : 1);
	}

	/**
	 * Destructor
	 */

	~moCudaEval() {

		delete[] host_FitnessArray;
		cudaFree(device_FitnessArray);
		cudaFree(&device_solution);

	}

	/**
	 * Set fitness of a solution neighbors
	 *@param _sol the solution which generate the neighborhood
	 *@param _neighbor the current neighbor
	 */

	void operator()(EOT & _sol, Neighbor & _neighbor) {

		_neighbor.fitness(host_FitnessArray[_neighbor.index()]);

	}

	/**
	 * Compute fitness for all  Kswap solution neighbors in device
	 * @param _sol the solution which generate the neighborhood
	 * @param _mapping the neighborhood mapping
	 * @param _Kswap the number of swap
	 */

	virtual void neighborhoodKswapEval(EOT & _sol, unsigned * _mapping,
			unsigned _Kswap) {

	}

	/**
	 * Compute fitness for all Kflip solution neighbors in device
	 * @param _sol the solution which generate the neighborhood
	 * @param _mapping the neighborhood mapping
	 * @param _Kflip the number of bit to flip
	 */
	virtual void neighborhoodKflipEval(EOT & _sol, unsigned * _mapping,
			unsigned _Kflip) {

	}

	/**
	 * Compute fitness for all solution neighbors in device
	 * @param _sol the solution which generate the neighborhood
	 */

	virtual void neighborhoodEval(EOT & _sol)=0;

protected:

	//the host array to save all neighbors fitness
	Fitness * host_FitnessArray;
	//the device array to save neighbors fitness computed in device
	Fitness * device_FitnessArray;
	//the device solution
	EOT device_solution;
	//the size of neighborhood
	unsigned int neighborhoodSize;
	//Cuda kernel dimension
	int kernel_Dim;

};

#endif