libgpusolver.h

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/* MIT License
 *
 * Copyright (c) 2016 Omar Alvarez <omar.alvarez@udc.es>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef __GPU_SOLVER_H
#define __GPU_SOLVER_H

#include <cstdio>
#include <csignal>
#include <iostream>

#include "crypto/equihash.h"
#include "libclwrapper.h"
#include "uint256.h"


#include "param.h"
#include <cassert>

#ifdef __APPLE__
#include <OpenCL/opencl.h>
#else
#include <CL/cl.h>
#endif

// The maximum size of the .cl file we read in and compile
#define MAX_SOURCE_SIZE         (0x200000)

#define DIGITBITS_S     PREFIX

class GPUSolverCancelledException : public std::exception
{
    virtual const char* what() const throw() {
        return "GPU Equihash solver was cancelled";
    }
};

enum GPUSolverCancelCheck
{
    ListGenerationGPU,
    ListSortingGPU
};

class GPUSolver {

public:
        GPUSolver();
        GPUSolver(unsigned platform, unsigned device);
        ~GPUSolver();
    bool run(unsigned int n, unsigned int k, uint8_t *header, size_t header_len, uint256 nonce,
        const std::function<bool(std::vector<unsigned char>)> validBlock,
        const std::function<bool(GPUSolverCancelCheck)> cancelled,
        crypto_generichash_blake2b_state base_state);

private:
        cl_gpuminer * miner;
        bool GPU;
        bool initOK;
        static const uint32_t PROOFSIZE = 1 << PARAM_K;
        //TODO 20?
        sols_t * indices;
        uint32_t n_sol;
        //Avg
        uint32_t counter = 0;
        float sum = 0.f;
        float avg = 0.f;

        bool GPUSolve(unsigned int n, unsigned int k, uint8_t *header, size_t header_len, uint256 &nonce,
        const std::function<bool(std::vector<unsigned char>)> validBlock,
        const std::function<bool(GPUSolverCancelCheck)> cancelled,
        crypto_generichash_blake2b_state base_state);

};

#endif // __GPU_SOLVER_H