Thread locking
CA 2384856 A1 · Owner: Hayward, Andrew · Inventors: Hayward, Andrew
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method of providing thread locking within a multithreading object-oriented computer program. Each object (400 500, 600) , includes a reserved lock word which is initially set to zero to indicate that the object is unlocked. When the object is to be locked the word is changed , to a pointer (630) which points to a particular memory block (710) within a separate lock pool (700). That memory block contains all the necessary locking information for the object. When the object is to be unlocked the pointer , (630) is deleted, and the lock word set back to zero. The corresponding block (710) in the lock pool is then released and may be reused for other locking , …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed August 18, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 18, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 18, 2022.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.