Generation and validation of reference handles

Details Generation and validation of reference handles Generation and validation of reference handles

1998-06-23

2000-08-15

Homere, Jean R.

Data processing: database and file management or data structures

Database design

Data structure types

707 2, 707 9, 709225, 709229, G06F 1730

Patent

active

061050393

ABSTRACT:
The present invention is embodied in a system and method for generating and validating reference handles for consumers requiring access to resources in a computer system. The system of the present invention includes a resource manager having a handle administrator, a plurality of consumers, and a plurality of resources. The handle administrator includes an assignment routine, a release routine, and a dereference routine. The assignment routine issues new handles, the release routine releases handles that are no longer required (thus rendering the handle invalid), and the dereference routine dereferences handles into a pointer to a resource, which entails verifying that the handle is valid. Also included is an auxiliary sub-routine for managing used and unused records, an expansion sub-routine for efficiently expanding the handle database, a handle recycling sub-routine for recycling handles, a contraction sub-routine for efficiently contracting the handle database, a hysteresis sub-routine for probabilistically contracting the handle database, and a memory allocation failure sub-routine to improve functionality in the event of memory allocation failure.

REFERENCES:
patent: 5375241 (1994-12-01), Walsh
patent: 5802590 (1998-09-01), Draves
patent: 5909580 (1999-06-01), Crelier et al.
patent: 6029160 (2000-02-01), Cabrera et al.

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