The Battle for Wesnoth  1.17.0-dev
random_synced.cpp
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1 /*
2  Copyright (C) 2014 - 2021
3  by David White <dave@whitevine.net>
4  Part of the Battle for Wesnoth Project https://www.wesnoth.org/
5 
6  This program is free software; you can redistribute it and/or modify
7  it under the terms of the GNU General Public License as published by
8  the Free Software Foundation; either version 2 of the License, or
9  (at your option) any later version.
10  This program is distributed in the hope that it will be useful,
11  but WITHOUT ANY WARRANTY.
12 
13  See the COPYING file for more details.
14 */
15 
16 #include "random_synced.hpp"
17 #include "log.hpp"
18 
19 static lg::log_domain log_random("random");
20 #define DBG_RND LOG_STREAM(debug, log_random)
21 #define LOG_RND LOG_STREAM(info, log_random)
22 #define WRN_RND LOG_STREAM(warn, log_random)
23 #define ERR_RND LOG_STREAM(err, log_random)
24 
25 namespace randomness
26 {
27  synced_rng::synced_rng(std::function<std::string()> seed_generator)
28  : has_valid_seed_(false), seed_generator_(seed_generator), gen_()
29  {
30  }
32  {
33  if(!has_valid_seed_)
34  {
35  initialize();
36  }
37  //getting here means random was called form inside a synced context.
38  uint32_t retv = gen_.get_next_random();
39 
40  LOG_RND << "randomness::rng::next_random_impl returned " << retv;
41  return retv;
42  }
43 
45  {
46  std::string new_seed = seed_generator_();
47  gen_.seed_random(new_seed, 0);
48  has_valid_seed_ = true;
49  }
50 
52  {
53 
54  }
55 
57  {
58  return true;
59  }
60 }
uint32_t get_next_random()
Get a new random number.
Definition: mt_rng.cpp:63
#define LOG_RND
virtual bool is_networked() const
Is this random source networked? If it is it&#39;s very important we do actually use this random source t...
virtual uint32_t next_random_impl()
static lg::log_domain log_random("random")
std::function< std::string()> seed_generator_
synced_rng(std::function< std::string()> seed_generator)
Standard logging facilities (interface).
void seed_random(const std::string &seed, const unsigned int call_count=0)
Same as uint32_t version, but uses a stringstream to convert given hex string.
Definition: mt_rng.cpp:89