Semaphore access in a multiprocessor system
US6549961B1 · kind B1 · utility
34Cited by
9References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 27, 1999 |
| Grant date | Apr 15, 2003 |
| Priority date | — |
| Expiry date | Oct 27, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/52
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Access control to protected resources in a multiprocessor system is implemented without additional use of the processor bus. A bridge interconnects each processor with shared resources. The bridge has a semaphore corresponding to each protected resource indicating if the corresponding resource is available. The bridge halts a processor requesting access to any resource having a corresponding semaphore indicating the requested resource is not available.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.