Method and apparatus for resource access synchronization

Electrical computers and digital processing systems: virtual mac – Task management or control – Process scheduling

Reexamination Certificate

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C710S240000, C718S104000

Reexamination Certificate

active

07100161

ABSTRACT:
A resource access control mechanism for a multi-threaded computing environment associates a sequence of one or more mutexes with a resource. When a requesting thread attempts to access the resource, a mutex is locked and allocated to the requesting thread, and if a previous mutex in the sequence is present, an attempt to lock the previous mutex is made. If the previous mutex is already locked, the requesting thread is suspended until the previous mutex is unlocked.

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Communication pursuant to Article 96(2) EPC for Application No. 00 309 238.4—1243, May 18, 2005.
Magnusson, et al, “Queue Locks on Cache Coherent Multiprocessors,” Proceedings Eighth International Parallel Processing Symposium, US, IEEE Computer Society Press, Apr. 26, 1994, pp. 165-171.

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