= ring buffer = circular que

olemus
püsimahuga FIFO-puhver, mille täitumisel jätkub töö vanimate andmete ülekirjutusega
= a data structure that uses a single, fixed-size buffer as if it were connected end-to-end

ülevaateid
https://en.wikipedia.org/wiki/Circular_buffer
http://www.dspguide.com/ch28/2.htm
https://www.kernel.org/doc/Documentation/circular-buffers.txt