Browse Prior Art Database

Method of Controlling Access to a Serially Reusable Resource

IP.com Disclosure Number: IPCOM000055567D
Original Publication Date: 1980-Aug-01
Included in the Prior Art Database: 2005-Feb-13

Publishing Venue

IBM

Related People

Authors:
Claggett, JR Cook, RL [+details]

Abstract

In a uniprocessor environment, it is possible to use external interrupt disablement effectively to serialize access to chains or queues of elements (and possibly to other types of resources). Excessive overhead is required to control access to a serially reusable resource with classical enqueue/dequeue functions. The method described herein is storage/performance efficient relative to software enqueue. It also minimizes the maximum continuous external interrupt disable time by disabling only while accessing an element of the resource, and enabling external interrupts prior to sequencing to successive elements.