The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 22, 1990
Filed:
Oct. 31, 1988
John J Vriezen, Zumbrota, MN (US);
Robin N Niemeyer, Eau Claire, WI (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
An enhanced semaphore architecture, referred to herein as a 'fullphore', combines the 'P' and 'V' operations of a semaphore into a single 'S' operation capable of handling both consumer processes and producer processes. A fullphore has a count, a limit, a queue for waiting processes, a wait permitted flag, and a operation flag. The operation flag determines whether the count is incremented or decremented by one. The architecture of the fullphore 'S' operation is s(F,OP, WAIT.sub.-- PERMITTED), where F is the fullphore to be operated on, OP is +1 for a producer process and -1 for a consumer process, and WAIT.sub.-- PERMITTED is YES if the process will wait if necessary and NO if it will not.