rng.hpp

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/*
 *  Cypress -- C++ Spiking Neural Network Simulation Framework
 *  Copyright (C) 2020  Christoph Ostrau
 *
 *  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 should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#pragma once

#include <random>

namespace cypress {
class RNG {
private:    
    std::default_random_engine re;
    RNG()
    {
        re = std::default_random_engine(std::random_device{}());
    };

    ~RNG() = default;

public:
    RNG(RNG const &) = delete;
    void operator=(RNG const &) = delete;

    static RNG &instance()
    {
        static RNG instance;
        return instance;
    }
    
    std::default_random_engine& get(){ return re;}
    
    void seed(size_t seed){
        re = std::default_random_engine(seed);
    }
};
}  // namespace cypress