{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9690737","patent":{"patent_number":"US-9690737","title":"Systems and methods for controlling access to a shared data structure with reader-writer locks using multiple sub-locks","assignee":null,"inventors":[],"filing_date":"2012-07-31T00:00:00.000Z","publication_date":"2017-06-27T00:00:00.000Z","cpc_codes":["G06F","G06F","G06F","G06F","G06F","G06F","G06F"],"num_claims":15,"abstract":"A computer system for controlling access to a shared data structure includes a shared memory coupled to first and second processing units that stores a multi-lock to control access to a shared data structure. The multi-lock includes a first sub-lock associated with the first processing unit and a second sub-lock associated with the second processing unit The system also includes a data access control engine to receive a request to read from the data structure from the first processing unit and, as a result, determine whether a privately modifiable copy the first sub-lock exists in a first cache dedicated to the first processing unit, acquire a read portion of the first sub-lock and not communicate the acquisition across a coherence bus if a privately modifiable copy of the first sub-lock exists in the first cache, and if a privately modifiable copy of the first sub-lock does not exist in the first cache, load the first sub-lock into the first cache if no copy is in the first cache, shootdown other copies of the first sub-lock, and acquire the read portion of the first sub-lock."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Systems and methods for controlling access to a shared data structure with reader-writer locks using multiple sub-locks","description":"A computer system for controlling access to a shared data structure includes a shared memory coupled to first and second processing units that stores a multi-lock to control access to a shared data st","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9690737","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9690737","citation_suggestion":"Patentable. \"Systems and methods for controlling access to a shared data structure with reader-writer locks using multiple sub-locks\" (US-9690737). https://patentable.app/patents/US-9690737","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9690737","json":"https://patentable.app/api/llm-context/US-9690737","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T14:02:00.229Z"}