Method set_pointer

system/lib/libcxx/include/__thread/thread.h:116–119

template <class _Tp>
void __thread_specific_ptr<_Tp>::set_pointer(pointer __p) {
  _LIBCPP_ASSERT_INTERNAL(get() == nullptr, "Attempting to overwrite thread local data");
  std::__libcpp_tls_set(__key_, __p);
}

template <>
struct hash<__thread_id> : public __unary_function<__thread_id, size_t> {