Abstract
Presents wait-free algorithms for implementing multi-writer read/write pure-buffers in multiprocessor real-time systems. Such buffers are commonly used when existing data is overwritten as newly-produced data becomes available. Pure-buffer algorithms share several buffers between client processes and use handshaking mechanisms to ensure the safety of concurrent read and write operations. We present algorithms optimized for both quantum and priority-scheduled systems. When used to implement a B-word buffer shared across a constant number of processors, the time complexity for reading and writing in each of our algorithms is O(B), and the space complexity is /spl Theta/(B).