Realtime-safe read copy update with per-processor read/write locks
US7653791B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 11, 2008 |
| Grant date | Jan 26, 2010 |
| Priority date | — |
| Expiry date | Apr 11, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2209/523
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A technique for realtime-safe detection of a grace period for deferring the destruction of a shared data element until pre-existing references to the data element have been removed. A per-processor read/write lock is established for each of one or more processors. When reading a shared data element at a processor, the processor's read/write lock is acquired for reading, the shared data element is referenced, and the read/write lock that was acquired for reading is released. When starting a new grace period, all of the read/write locks are acquired for writing, a new grace period is started, and all of the read/write locks are released.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.