Composite abortable locks
US7984444B1 · kind B1 · utility
6Cited by
5References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 15, 2005 |
| Grant date | Jul 19, 2011 |
| Priority date | — |
| Expiry date | May 19, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/526
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A lock implementation has properties of both backoff locks and queue locks. Such a “composite” lock is abortable and is provided with a constant number of preallocated nodes. A thread requesting the lock selects one of the nodes, attempts to acquire the selected node, and, if successful, inserts the selected node in a wait-queue for the lock. Because there is only a constant number of nodes for the wait-queue, all requesting threads may not be queued. Requesting threads unable to successfully acquire a selected node may backoff and retry selecting and acquiring a node. A node at the front of the wait-queue holds the lock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.