I have a question that I shouldn't need to ask, but I'm
kind of lost in the code.
The btl sm component is using the circular buffers to write and read
fragments (sending and receiving).
In the write_to_head and read_from_tail I can only see pointers beeing set,
no data being moved. So where does the actual data movement/copying take
place? I'm thinking maybe a callback function existing somewhere :)
Thank you for your help now and earlier.