From 84437eb37b4836195eac3c067cb3dfdcae8380ca Mon Sep 17 00:00:00 2001
From: Maximilian Reininghaus <maximilian.reininghaus@tu-dortmund.de>
Date: Tue, 13 Apr 2021 16:39:45 +0200
Subject: [PATCH] fixed RNGManager::seedAll(void)
---
.../detail/framework/random/RNGManager.inl | 21 ++++++++++++-------
1 file changed, 14 insertions(+), 7 deletions(-)
diff --git a/corsika/detail/framework/random/RNGManager.inl b/corsika/detail/framework/random/RNGManager.inl
index 575ab43b7..1d0da4831 100644
--- a/corsika/detail/framework/random/RNGManager.inl
+++ b/corsika/detail/framework/random/RNGManager.inl
@@ -8,6 +8,10 @@
#pragma once
+#include <iterator>
+#include <random>
+#include <sstream>
+
namespace corsika {
inline void RNGManager::registerRandomStream(string_type const& pStreamName) {
@@ -48,13 +52,16 @@ namespace corsika {
inline void RNGManager::seedAll(void) {
std::random_device rd;
- std::seed_seq sseq{rd(), rd(), rd(), rd(), rd(), rd()};
- for (auto& entry : rngs_) {
- std::vector<std::uint32_t> seeds(1);
- sseq.generate(seeds.begin(), seeds.end());
- std::uint32_t seed = seeds[0];
- CORSIKA_LOG_TRACE("Random seed stream {} seed {}", entry.first, seed);
- entry.second.seed(seed);
+
+ for (auto& [streamName, rng] : rngs_) {
+ std::seed_seq sseq{rd(), rd(), rd(), rd(), rd(), rd()}; // 6 really random values
+
+ // for logging collect sseq input values in string
+ std::stringstream ss;
+ sseq.param(std::ostream_iterator<int>{ss, " "});
+ CORSIKA_LOG_DEBUG("Random seed stream {} seed {}", streamName, ss.str());
+
+ rng.seed(sseq);
}
}
--
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