On Synchronizing Readers and Writers with Semaphores | Zendy

J. Leslie Keedy | Zendy; Jarrett Rosenberg | Zendy; Kotagiri Ramamohanarao | Zendy

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On Synchronizing Readers and Writers with Semaphores

Author(s) -

J. Leslie Keedy,

Jarrett Rosenberg,

Kotagiri Ramamohanarao

Publication year - 1982

Publication title -

the computer journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.319

H-Index - 64

eISSN - 1460-2067

pISSN - 0010-4620

DOI - 10.1093/comjnl/25.1.121

Subject(s) - semaphore , synchronizing , computer science , synchronization (alternating current) , microcode , software , programming language , parallel computing , operating system , telecommunications , channel (broadcasting) , transmission (telecommunications)

A weakness in the reader priority solution proposed by Curtois, Heymans and Paraas for the problem of synchronizing concurrent readers and writers is described and an improvement is explained. The difficulties of solving complex synchronizing problems by using standard semaphore primitives, as illustrated by this example, lead us to propose that special-purpose synchronization techniques should be supported by a judicious combination of hardware/microcode and software routines. We then describe an efficient solution for the reader/writer problem which is easy to understand, to implement and to use.

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