System and methods for providing encapsulated and...

G - Physics – 06 – F

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G06F 9/44 (2006.01) G06F 9/46 (2006.01)

Patent

CA 2295536

A system for, and method of, providing encapsulated and performance-efficient data references in an object-oriented controller and a distributed, real time process control system employing the system or the method. In one embodiment, the system includes: (1) a client algorithm block that generates a request for an address to enable the client algorithm block to gain direct access to data stored at the address and (2) a supplier algorithm block, that receives and evaluates the request and (2a) if the supplier algorithm block grants the request, communicates the address to the client algorithm block, allowing the client algorithm block to gain direct access to the data and (2b) if the supplier algorithm block denies the request, withholds the address, forcing the client algorithm block to gain indirect access to the data.

L'invention concerne un système et un procédé, destinés à fournir des références de données encapsulée, aux performances efficaces, dans un module de commande orienté objet, ainsi qu'un système réparti de commande de processus en temps réel mettant en oeuvre ce système ou ce procédé. Dans un mode de réalisation, le système comprend: (1) un bloc d'algorithmes client qui produit une demande d'adresse, afin de permettre audit bloc client d'accéder directement aux données stockées au niveau de cette adresse, et (2) un bloc d'algorithmes fournisseur, qui reçoit et évalue la demande, deux cas pouvant se présenter: (2a) si le bloc d'algorithmes fournisseur accède à la demande, il communique l'adresse au bloc d'algorithmes client, permettant à ce dernier bloc d'accéder directement aux données, et (2b) si le bloc d'algorithmes fournisseur refuse la demande, il conserve l'adresse, forçant le bloc d'algorithmes client à accéder de manière indirecte aux données.

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