ceph/src/boost/libs/math/test/threading_sanity_check.cpp

   1 // Copyright John Maddock, 2021
   2 // Use, modification and distribution are subject to the
   3 // Boost Software License, Version 1.0.
   4 // (See accompanying file LICENSE_1_0.txt
   5 // or copy at http://www.boost.org/LICENSE_1_0.txt)
   6
   7 #include <boost/math/tools/config.hpp>
   8
   9 #if !defined(BOOST_MATH_NO_THREAD_LOCAL_WITH_NON_TRIVIAL_TYPES) && defined(BOOST_HAS_THREADS)
  10
  11 #include <vector>
  12 #include <atomic>
  13 #include <thread>
  14 #include <random>
  15 #include <algorithm>
  16 #include <iostream>
  17
  18 std::atomic<int> counter{ 0 };
  19
  20
  21 void thread_proc()
  22 {
  23    static thread_local std::vector<double> list;
  24
  25    std::default_random_engine rnd;
  26    std::uniform_real_distribution<> dist;
  27
  28    for (unsigned i = 0; i < 1000; ++i)
  29    {
  30       list.push_back(dist(rnd));
  31       ++counter;
  32    }
  33    std::sort(list.begin(), list.end());
  34 }
  35
  36 int main()
  37 {
  38    std::thread f1(thread_proc);
  39    std::thread f2(thread_proc);
  40    std::thread f3(thread_proc);
  41    std::thread f4(thread_proc);
  42    std::thread f5(thread_proc);
  43    std::thread f6(thread_proc);
  44
  45    f1.join();
  46    f2.join();
  47    f3.join();
  48    f4.join();
  49    f5.join();
  50    f6.join();
  51
  52    std::cout << "Counter value was: " << counter << std::endl;
  53
  54    return counter - 6000;
  55 }
  56
  57 #else
  58
  59 int main() { return 0; }
  60
  61 #endif