include/pybind11/pybind11.h

918         auto &internals = get_internals();
920         tinfo->direct_conversions = &internals.direct_conversions[tindex];
924             internals.registered_types_cpp[tindex] = tinfo;
925         internals.registered_types_py[(PyTypeObject *) m_ptr] = { tinfo };
1639 inline std::pair<decltype(internals::registered_types_py)::iterator, bool> all_type_info_get_cache(PyTypeObject *type) {
1896         auto const &internals = detail::get_internals();
1897         tstate = (PyThreadState *) PYBIND11_TLS_GET_VALUE(internals.tstate);
1903                below. Note we don't save this state with internals.tstate, since we don't
1909             tstate = PyThreadState_New(internals.istate);
1915             PYBIND11_TLS_REPLACE_VALUE(internals.tstate, tstate);
1973         // `internals.tstate` for subsequent `gil_scoped_acquire` calls. Otherwise, an
1975         const auto &internals = detail::get_internals();
1978             auto key = internals.tstate;