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:
Nov. 13, 2012
Filed:
Dec. 14, 2009
Chunyan Song, Bellevue, WA (US);
Stephen H. Toub, Seattle, WA (US);
Chunyan Song, Bellevue, WA (US);
Stephen H. Toub, Seattle, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
The present invention extends to methods, systems, and computer program products for maintaining a count for lock-free stack access. A numeric value representative of the total count of nodes in a linked list is maintained at the head node for the linked list. Commands for pushing and popping nodes appropriately update the total count at a new head node when nodes are added to and removed from the linked list. Thus, determining the count of nodes in a linked list is an order 1 (or O(1)) operation, and remains constant even when the size of a linked list changes.