drd/tests/std_mutex.cpp

   1 // See also https://bugs.kde.org/show_bug.cgi?id=416286
   2
   3 #include <mutex>
   4 #include <iostream>
   5 #include <thread>
   6 #include <vector>
   7
   8 class counter {
   9 public:
  10   counter(): mutex() {}
  11   void get() { std::unique_lock<std::mutex> lock(mutex); }
  12
  13 private:
  14   std::mutex mutex;
  15 };
  16
  17 static counter& get_counter()
  18 {
  19   static counter manager;
  20   return manager;
  21 }
  22
  23 static void do_work()
  24 {
  25   get_counter().get();
  26 }
  27
  28 int main()
  29 {
  30   std::vector<std::thread> v;
  31
  32   for (int i = 0; i < 16; i++)
  33     v.emplace_back([]{ do_work(); });
  34
  35   for (auto& t : v)
  36     t.join();
  37
  38   std::cerr << "Done.\n";
  39 }