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the plan is to have random_new::generator which can be a rng_synced or not dependng on whether we are in a synced context (for example select events are no synced context) this commit is part of pr 121.
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/* | ||
Part of the Battle for Wesnoth Project http://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. | ||
*/ | ||
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#include "random_new.hpp" | ||
#include "log.hpp" | ||
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#include <stdlib.h> | ||
static lg::log_domain log_random("random"); | ||
#define DBG_RND LOG_STREAM(debug, log_random) | ||
#define LOG_RND LOG_STREAM(info, log_random) | ||
#define WRN_RND LOG_STREAM(warn, log_random) | ||
#define ERR_RND LOG_STREAM(err, log_random) | ||
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namespace random_new | ||
{ | ||
rng* generator = new rng(); | ||
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rng::rng() | ||
: random_calls_(0) | ||
{ | ||
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} | ||
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rng::~rng() | ||
{ | ||
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} | ||
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unsigned int rng::get_random_calls() | ||
{ | ||
return random_calls_; | ||
} | ||
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int rng::next_random() | ||
{ | ||
random_calls_++; | ||
return next_random_impl(); | ||
} | ||
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int rng::next_random_impl() | ||
{ | ||
//getting here means random was called form outsiude a synced context. | ||
int retv = rand(); | ||
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LOG_RND << "random_new::rng::next_random returned " << retv; | ||
return retv; | ||
} | ||
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} |
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/* | ||
Part of the Battle for Wesnoth Project http://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. | ||
*/ | ||
#ifndef RANDOM_NEW_H_INCLUDED | ||
#define RANDOM_NEW_H_INCLUDED | ||
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namespace random_new | ||
{ | ||
//this class does NOT give synced random results. | ||
class rng | ||
{ | ||
public: | ||
rng(); | ||
int next_random(); | ||
virtual ~rng(); | ||
unsigned int get_random_calls(); | ||
protected: | ||
virtual int next_random_impl(); | ||
unsigned int random_calls_; | ||
}; | ||
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// this generator is autmatilcy synced during synced context. | ||
// calling this should automaticly clear the undo stack. | ||
// | ||
extern rng* generator; | ||
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} | ||
#endif |
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/* | ||
Part of the Battle for Wesnoth Project http://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. | ||
*/ | ||
#include "random_new_deterministic.hpp" | ||
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namespace random_new | ||
{ | ||
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rng_deterministic::rng_deterministic(rand_rng::simple_rng& gen) | ||
: generator_(gen) | ||
{ | ||
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} | ||
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rng_deterministic::~rng_deterministic() | ||
{ | ||
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} | ||
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int rng_deterministic::next_random_impl() | ||
{ | ||
return generator_.get_next_random(); | ||
} | ||
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set_random_determinstic::set_random_determinstic(rand_rng::simple_rng& rng) | ||
: old_rng_(generator), new_rng_(rng) | ||
{ | ||
generator = &new_rng_; | ||
} | ||
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set_random_determinstic::~set_random_determinstic() | ||
{ | ||
generator = old_rng_; | ||
} | ||
} |
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/* | ||
Part of the Battle for Wesnoth Project http://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. | ||
*/ | ||
#ifndef RANDOM_NEW_DETERMINISTIC_H_INCLUDED | ||
#define RANDOM_NEW_DETERMINISTIC_H_INCLUDED | ||
#include "random_new.hpp" | ||
#include "simple_rng.hpp" | ||
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namespace random_new | ||
{ | ||
/* | ||
this is the determinstic random class, it behaves similar to the old random class. | ||
it's only application is at the very start of the scneario. | ||
or durign the "Deterministic SP mode" | ||
*/ | ||
class rng_deterministic : public random_new::rng | ||
{ | ||
public: | ||
rng_deterministic(rand_rng::simple_rng& gen); | ||
virtual ~rng_deterministic(); | ||
protected: | ||
virtual int next_random_impl(); | ||
private: | ||
rand_rng::simple_rng& generator_; | ||
}; | ||
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//RAII class | ||
class set_random_determinstic | ||
{ | ||
public: | ||
set_random_determinstic(rand_rng::simple_rng& rng); | ||
~set_random_determinstic(); | ||
private : | ||
rng* old_rng_; | ||
rng_deterministic new_rng_; | ||
}; | ||
} | ||
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#endif |
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/* | ||
Part of the Battle for Wesnoth Project http://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. | ||
*/ | ||
#include "random_new_synced.hpp" | ||
#include "log.hpp" | ||
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static lg::log_domain log_random("random"); | ||
#define DBG_RND LOG_STREAM(debug, log_random) | ||
#define LOG_RND LOG_STREAM(info, log_random) | ||
#define WRN_RND LOG_STREAM(warn, log_random) | ||
#define ERR_RND LOG_STREAM(err, log_random) | ||
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namespace random_new | ||
{ | ||
synced_rng::synced_rng(boost::function0<int> seed_generator) | ||
: has_valid_seed_(false), seed_generator_(seed_generator), gen_() | ||
{ | ||
} | ||
int synced_rng::next_random_impl() | ||
{ | ||
if(!has_valid_seed_) | ||
{ | ||
initialize(); | ||
} | ||
//getting here means random was called form inside a synced context. | ||
int retv = gen_.get_next_random(); | ||
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LOG_RND << "random_new::rng::next_random_impl returned " << retv; | ||
return retv; | ||
} | ||
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void synced_rng::initialize() | ||
{ | ||
int new_seed = seed_generator_(); | ||
gen_.seed_random(new_seed, 0); | ||
has_valid_seed_ = true; | ||
} | ||
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synced_rng::~synced_rng() | ||
{ | ||
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} | ||
} |
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,45 @@ | ||
/* | ||
Part of the Battle for Wesnoth Project http://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. | ||
*/ | ||
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#ifndef RANDOM_NEW_SYNCED_H_INCLUDED | ||
#define RANDOM_NEW_SYNCED_H_INCLUDED | ||
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#include "random_new.hpp" | ||
#include "simple_rng.hpp" | ||
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#include <boost/function.hpp> | ||
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/* | ||
todo: use a boost::random based solution. | ||
*/ | ||
namespace random_new | ||
{ | ||
class synced_rng : public random_new::rng | ||
{ | ||
public: | ||
synced_rng(boost::function0<int> seed_generator); | ||
virtual ~synced_rng(); | ||
protected: | ||
virtual int next_random_impl(); | ||
private: | ||
void initialize(); | ||
bool has_valid_seed_; | ||
boost::function0<int> seed_generator_; | ||
//TODO: replayce this by boost::random::mt19937 or similar | ||
rand_rng::simple_rng gen_; | ||
}; | ||
} | ||
#endif |