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:
Feb. 22, 2011
Filed:
Sep. 13, 2004
Dave Olson, Palo Alto, CA (US);
Dave Olson, Palo Alto, CA (US);
QLOGIC, Corporation, Aliso Viejo, CA (US);
Abstract
A buffer availability manager ensures that buffers are available before processes write thereto. The buffer availability manager maintains a plurality of register sets corresponding to the plurality of buffers. Each register set comprises a status indicator and a generation counter. Prior to writing to a buffer, the corresponding register set is read. Data is written to an individual buffer only if the status indicator indicates that the buffer is not busy, and the current value of the generation counter is not equal to a stored value from a prior register set read. The buffer availability manager detects writing of data to the buffer, and in response updates the status indicator to indicate that the buffer is busy. After processing the data in the buffer, the buffer availability manager updates the status indicator to not busy, and updates the value of the generation counter.