pub unsafe extern "C" fn rb_thread_call_without_gvl(
func: CallbackPtr,
args: *const c_void,
unblock_func: CallbackPtr,
unblock_args: *const c_void,
) -> *mut c_voidpub unsafe extern "C" fn rb_thread_call_without_gvl(
func: CallbackPtr,
args: *const c_void,
unblock_func: CallbackPtr,
unblock_args: *const c_void,
) -> *mut c_void