circular_buffer_write function
Implementation
@ffi.Native<
    ffi.Void Function(
        ffi.Pointer<CircularBuffer>, ffi.Pointer<ffi.Float>, ffi.Size)>()
external void circular_buffer_write(
  ffi.Pointer<CircularBuffer> cb,
  ffi.Pointer<ffi.Float> data,
  int size_in_floats,
);