Method TestThread

tests/test_iostream.cpp:37–55

// redirect is called at some point to test the safety of scoped_estream_redirect
struct TestThread {
    TestThread() : stop_{false} {
        auto thread_f = [this] {
            static std::mutex cout_mutex;
            while (!stop_) {
                {
                    // #HelpAppreciated: Work on iostream.h thread safety.
                    // Without this lock, the clang ThreadSanitizer (tsan) reliably reports a
                    // data race, and this test is predictably flakey on Windows.
                    // For more background see the discussion under
                    // https://github.com/pybind/pybind11/pull/2982 and
                    // https://github.com/pybind/pybind11/pull/2995.
                    const std::lock_guard<std::mutex> lock(cout_mutex);
                    std::cout << "x" << std::flush;
                }
                std::this_thread::sleep_for(std::chrono::microseconds(50));
            }
        };
        t_ = new std::thread(std::move(thread_f));
    }

    ~TestThread() { delete t_; }