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:
Jan. 29, 2013
Filed:
Oct. 31, 2008
Rajan Arora, Faridabad, IN;
Randy Bishop, Pleasanton, CA (US);
Arnold Ginetti, Antibes, FR;
Gilles S. C. Lamant, Sunnyvale, CA (US);
Rajan Arora, Faridabad, IN;
Randy Bishop, Pleasanton, CA (US);
Arnold Ginetti, Antibes, FR;
Gilles S. C. Lamant, Sunnyvale, CA (US);
Cadence Design Systems, Inc., San Jose, CA (US);
Abstract
An improved approach to pcell caching is disclosed that enables safe and efficient multi-user access to pcell caches. Locking structures are used in conjunction with counters to provide multi-user support for pcell caches. When a modification occurs to cached pcell data, an update is made to the appropriate counter(s). The value(s) of the counters are checked to determine whether the item of data operated upon by an entity is still valid or if another concurrent entity has made changes to the data.