Race free data transfer algorithm using hardware based polling

摘要

A method and apparatus for a race free data transfer algorithm using hardware based polling. One disclosed method transfers information between a target device and a buffer which is one of a set of buffers. The buffer is pointed to by a current buffer value stored in a controller. The current buffer value is adjusted to point to a next buffer if the current buffer value is different than a last buffer value. One of the set of buffers is serviced utilizing either the current buffer value or the last buffer value from the controller.