Davide Pesavento
45 lines
1.7 KiB
C++
45 lines
1.7 KiB
C++
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2014-2019, Regents of the University of California,
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* Arizona Board of Regents,
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* Colorado State University,
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* University Pierre & Marie Curie, Sorbonne University,
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* Washington University in St. Louis,
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* Beijing Institute of Technology,
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* The University of Memphis.
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*
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* This file is part of NFD (Named Data Networking Forwarding Daemon).
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* See AUTHORS.md for complete list of NFD authors and contributors.
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*
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* NFD is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Foundation,
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* either version 3 of the License, or (at your option) any later version.
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*
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* NFD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* NFD, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "random.hpp"
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#include <boost/thread/tss.hpp>
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namespace nfd {
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std::mt19937&
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getGlobalRng()
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{
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static boost::thread_specific_ptr<std::mt19937> rng;
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if (rng.get() == nullptr) {
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std::random_device rd;
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// seed with 256 bits of entropy
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std::seed_seq seeds{rd(), rd(), rd(), rd(), rd(), rd(), rd(), rd()};
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rng.reset(new std::mt19937(seeds));
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}
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return *rng;
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}
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} // namespace nfd
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