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:
Jul. 20, 1999
Filed:
Jun. 19, 1997
Dominique Guidot, Sevres, FR;
Franck Jouenne, Le Plessis Trevise, FR;
Benoit Paul Dubois Taine, Bourg la Reine, FR;
Alcatel Alsthom Compagnie Generale D'Electricite, Paris, FR;
Abstract
A method of isolating a memory location containing an obsolete value of a variable, in a shared memory of a computer, said location being referenced via a pointer for access in the context of a first transaction, a lock called a 'hold' being placed on said location and being assigned to a single task, said hold preventing any other task from accessing said location. The method of the invention does not free the location containing the obsolete value, but it isolates it from transactions other than that transaction which possesses the first pointer. This allows the task owning the first pointer to continue to access said obsolete value. However, any transaction can access another value of the variable, without waiting, because the descriptor of said variable directs said transactions to a location which is freely accessible and contains said other value.