thread: remove win32 SetThreadDescription

[sreimers]

only available on newer systems

[paresy]

Hi! I have just seen this commit and wanted to share some code, that we use in another project to automatically detect availability of this function:

    // SetThreadDescription is only available on Windows 10 and later
    using SetThreadDescription_t = decltype(&SetThreadDescription);

    const HMODULE hKernel = GetModuleHandle("KernelBase.dll");
    if (hKernel == nullptr) {
        return;
    }

    const auto SetThreadDescription_p = reinterpret_cast<SetThreadDescription_t>(GetProcAddress(hKernel, "SetThreadDescription"));
    if (SetThreadDescription_p == nullptr) {
        return;
    }

    auto wName = std::wstring(Name.begin(), Name.end());

    SetThreadDescription_p(GetCurrentThread(), wName.c_str());

Maybe this helps to bringt back this function 😄