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:
Oct. 03, 2000
Filed:
Oct. 17, 1997
Jean-Francedilla.ois Autechaud, Paris, FR;
Christophe Dionet, Ivry sur Seine, FR;
Bull, S.A., Louveciennes, FR;
Abstract
In order to allow a plurality of remote data processing systems (1, 2) to communicate with one another by means of a storage unit (8) shared among these remote systems, each data processing system (1, 2) has the capability to reserve itself temporary exclusive access to the storage unit (8) by means of atomic operations. One particular atomic operation used is comprised of replacing a current value of a register (OPA) in the storage unit (8) with a new value communicated by the data processing system (1, 2) remote from the storage unit, it being understood that the remote data processing system knows an old value of the register (OPA) that is not necessarily equal to its current value. A device is installed in a storage controller (7, 16, 27) for the purpose of executing the atomic operation locally relative to the storage unit (8).