U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Apparatus and method removing increment/decrement pairs to decimate a block reference stream

Patent 4716524 Issued on December 29, 1987. Estimated Expiration Date: Icon_subject April 4, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Plural memory controller apparatus Patent #: 4016545
Issued on: 04/05/1977
Inventor: Lipovski

Inventors

Assignee

Application

No. 06/719778 filed on 04/04/1985

US Classes:

711/219Incrementing, decrementing, or shifting circuitry

Examiners

Primary: Zache, Raulfe B.

Attorney, Agent or Firm

International Class

G06F 12/02 (20060101)

Abstract

A reference count decimator and method of operating a computer system includes a decimator queue for containing indications of pointer reference count increments. Apparatus is provided for determining if a referencing event would cause a decrement of a reference count, and for searching the decimator queue to determine if a counterpart of the reference event exists in the queue, to thereby define an increment/decrement pair. If an increment/decrement pair is determined to exist in the queue, the increment/decrement pair is cancelled from the queue so that the increment/decrement point reference pairs are removed from the computer system without actually modifying the reference count indications associated with the memory blocks.

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