libshit

Just some random shit
git clone https://git.neptards.moe/neptards/libshit.git
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shared_ptr.cpp (1607B)

      1 #include "libshit/shared_ptr.hpp"
      2 
      3 #include "libshit/doctest.hpp"
      4 #include "libshit/random.hpp"
      5 
      6 #include <array>
      7 #include <thread>
      8 #include <vector>
      9 
     10 namespace Libshit::Test
     11 {
     12   TEST_SUITE_BEGIN("Libshit::SharedPtr");
     13 
     14   namespace
     15   {
     16     struct Foo : RefCounted {};
     17   }
     18 
     19   // Skip this test on valgrind on CI. First, valgrind is slow a shit to begin
     20   // with then there is the problem that valgrind forces execution onto a single
     21   // CPU while thread_concurrency still reports the real CPU count... so the
     22   // more cores you have, the slower this test becomes. For example, on my
     23   // 4-core + hypertreading (=8 threads) CPU, to run the unoptimized
     24   // libshit-tests takes 2 seconds, with valgrind it takes 7.5 minutes.
     25   TEST_CASE_TEMPLATE("multithread[no_valgrind]", T, Foo, int)
     26   {
     27     std::array<Libshit::SmartPtr<T>, 10> ptrs;
     28     for (auto& p : ptrs) p = Libshit::MakeSmart<T>();
     29 
     30     static constexpr const unsigned COUNT = 1000000;
     31     auto fun = [&]()
     32     {
     33       std::array<Libshit::SmartPtr<T>, 10> strong;
     34       std::array<Libshit::WeakSmartPtr<T>, 10> weak;
     35       Xoshiro128p rnd;
     36 
     37       for (unsigned i = 0; i < COUNT; ++i)
     38         if (rnd.Gen<bool>())
     39           strong[rnd.Gen<unsigned, 10>()] = ptrs[rnd.Gen<unsigned, 10>()];
     40         else
     41           weak[rnd.Gen<unsigned, 10>()] = ptrs[rnd.Gen<unsigned, 10>()];
     42     };
     43 
     44     std::vector<std::thread> thrs;
     45     for (unsigned i = 0, n = std::thread::hardware_concurrency(); i < n; ++i)
     46       thrs.emplace_back(fun);
     47     for (auto& t : thrs) t.join();
     48 
     49     for (auto& p : ptrs)
     50       CHECK(p.use_count() == 1);
     51   }
     52 
     53   TEST_SUITE_END();
     54 }