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X and S Latch Using DOS Semaphores (S-Priority) and Other Serialization Considerations in the OS/2 Environment

IP.com Disclosure Number: IPCOM000035992D
Original Publication Date: 1989-Aug-01
Included in the Prior Art Database: 2005-Jan-28

Publishing Venue

IBM

Related People

Authors:
Arnold, HH Levine, FE [+details]

Abstract

A method is described to provide an S and X-latch function with S- latch priority using OS/2* Standard Edition semaphores. The method addresses the common multiprocessing problem of serializing updates and waiting for either availability of resources or for work to do. Although OS/2 allows the usage of a single semaphore for both serialization and wait/post operations, usage of a single semaphore for both of these purposes causes intermittent hangs.