Locking tool data objects in a framework environment

Details Locking tool data objects in a framework environment Locking tool data objects in a framework environment

1997-10-14

2000-02-15

Homere, Jean R.

Data processing: database and file management or data structures

Database design

Data structure types

707201, 711145, 711150, 3952004, G06F 1730

Patent

active

060264012

ABSTRACT:
When data, such as tool data, is commonly accessible, there is a danger that concurrent user processes will make overlapping modifications and leave the data in an incomplete or incomprehensible state. The invention provides a locking mechanism to guard against this. The lock objects are maintained in pool or repository. Two types of lock objects are provided; shareable locks that may be shared by many user processes and permit only read access to the locked data, and exclusive locks, useable by only one user process at a time, that permit the owning process to modify the locked data.

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C. J. Date "An Introduction toDatabase Systems", 6th Edition, p395-396, Aug. 1995.

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