3rd argument of pthread_setname_np [Was: SYS_gettid alternative on NetBSD]

[Mayuresh <mayuresh%acm.org@localhost>]

On Fri, Jul 22, 2022 at 12:07:36PM +0530, Mayuresh wrote:
>     /usr/pkgsrc/work/wip/py-torch/work/pytorch/third_party/kineto/libkineto/src/ThreadUtil.cpp: In function 'bool libkineto::setThreadName(const string&)':
>     /usr/pkgsrc/work/wip/py-torch/work/pytorch/third_party/kineto/libkineto/src/ThreadUtil.cpp:105:62: error: too few arguments to function 'int pthread_setname_np(pthread_t, const char*, void*)'
> 
>     bool setThreadName(const std::string& name) {
>     #ifdef __APPLE__
>       return 0 == pthread_setname_np(name.c_str());
>     #elif defined _MSC_VER
>       // Per https://docs.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-setthreaddescription
>       // Use runtime linking to set thread description
>       static auto _SetThreadDescription = reinterpret_cast<decltype(&SetThreadDescription)>(getKernel32Func("SetThreadDescription"));
>       if (!_SetThreadDescription) {
>         return false;
>       }
>       std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> conv;
>       std::wstring wname = conv.from_bytes(name);
>       HRESULT hr = _SetThreadDescription(GetCurrentThread(), wname.c_str());
>       return SUCCEEDED(hr);
>     #else
>       return 0 == pthread_setname_np(pthread_self(), name.c_str());
>     #endif
>     }

On NetBSD pthread_setname_np takes 3rd argument, which is described as:

    arg     The printf(3) argument used with name.

Does it mean pass something like "%s" for above code which does not have
the 3rd argument on Linux?

-- 
Mayuresh