Creates a glib.Source that triggers when stream can be read, or
cancellable is triggered or an error occurs. The callback on the
source is of the GPollableSourceFunc type.
As with g_pollable_input_stream_is_readable(), it is possible that
the stream may not actually be readable even after the source
triggers, so you should use g_pollable_input_stream_read_nonblocking()
rather than InputStream.read from the callback.
Creates a glib.Source that triggers when stream can be read, or cancellable is triggered or an error occurs. The callback on the source is of the GPollableSourceFunc type.
As with g_pollable_input_stream_is_readable(), it is possible that the stream may not actually be readable even after the source triggers, so you should use g_pollable_input_stream_read_nonblocking() rather than InputStream.read from the callback.