void os::thread_local_storage_at_put(int index, void* value) {

  {- -------------------------------------------
  (1) TlsSetValue() で TLS に値をセットするだけ.
      ---------------------------------------- -}

      TlsSetValue(index, value);

  {- -------------------------------------------
  (1) (assert)
      ---------------------------------------- -}

      assert(thread_local_storage_at(index) == value, "Just checking");
    }