The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 21, 1989
Filed:
Apr. 30, 1987
Howard R Courts, Austin, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A garbage collection system for digital computers classifies memory objects into generations. Objects in older generations which need to reference younger generations must do so indirectly through indirection cells located in the older generation. Thus, all pointers into a generation come from younger generations or indirection cells. When a generation is collected, the indirection cells in that generation are defined to be oldspace and collected in the usual manner. Indirection cells of older generations which can point to the generation being collected are processed by a scavenger. The system also includes read and write barriers which function to filter out undesirable pointers based on the classification and volatility of memory regions to which they point or are destined to be stored.