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:
Dec. 09, 2014
Filed:
Nov. 13, 2007
Mark S. Moir, Windham, NH (US);
Yosef Lev, Cambridge, MA (US);
Victor M. Luchangco, Cambridge, MA (US);
David Dice, Foxboro, MA (US);
Mark S. Moir, Windham, NH (US);
Yosef Lev, Cambridge, MA (US);
Victor M. Luchangco, Cambridge, MA (US);
David Dice, Foxboro, MA (US);
Oracle America, Inc., Redwood City, CA (US);
Abstract
A Scalable NonZero Indicator (SNZI) object in a concurrent computing application may include a shared data portion (e.g., a counter portion) and a shared nonzero indicator portion, and/or may be an element in a hierarchy of SNZI objects that filters changes in non-root nodes to a root node. SNZI objects may be accessed by software applications through an API that includes a query operation to return the value of the nonzero indicator, and arrive (increment) and depart (decrement) operations. Modifications of the data portion and/or the indicator portion may be performed using atomic read-modify-write type operations. Some SNZI objects may support a reset operation. A shared data object may be set to an intermediate value, or an announce bit may be set, to indicate that a modification is in progress that affects its corresponding indicator value. Another process or thread seeing this indication may 'help' complete the modification before proceeding.