/*
- * Copyright 2014 Facebook, Inc.
+ * Copyright 2015 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include <folly/Synchronized.h>
-static const auto seed = folly::randomNumberSeed();
-typedef std::mt19937 RandomT;
-static RandomT rng(seed);
+inline std::mt19937& getRNG() {
+ static const auto seed = folly::randomNumberSeed();
+ static std::mt19937 rng(seed);
+ return rng;
+}
template <class Integral1, class Integral2>
Integral2 random(Integral1 low, Integral2 up) {
std::uniform_int_distribution<> range(low, up);
- return range(rng);
+ return range(getRNG());
}
template <class Mutex>