random_synced.hpp

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/*
    Copyright (C) 2014 - 2025
    by David White <dave@whitevine.net>
    Part of the Battle for Wesnoth Project https://www.wesnoth.org/
 
    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 2 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.
 
    See the COPYING file for more details.
*/
 
#pragma once
 
#include "random.hpp"
#include "mt_rng.hpp"
 
#include <functional>
 
/*
todo: use a boost::random based solution.
*/
namespace randomness
{
    class synced_rng : public randomness::rng
    {
    public:
        synced_rng(std::function<std::string()> seed_generator);
        virtual ~synced_rng();
 
        virtual bool is_networked() const;
 
    protected:
        virtual uint32_t next_random_impl();
    private:
        void initialize();
        bool has_valid_seed_;
        std::function<std::string()> seed_generator_;
        mt_rng gen_;
    };
}