Method, system, and apparatus for managing access to a data...

Details Method, system, and apparatus for managing access to a data... Method, system, and apparatus for managing access to a data...

2004-06-21

2008-09-23

Lewis, Cheryl (Department: 2167)

Data processing: database and file management or data structures

Database design

Data structure types

C707S793000, C707S793000, C707S793000

Reexamination Certificate

active

07428539

ABSTRACT:
In accordance with an embodiment of this invention, a mechanism for managing a plurality of access requests for a data object is provided. The mechanism includes a lock control identifying whether a requested data object is in use and a waiter control identifying whether at least one of the plurality of access requests have been denied immediate access to the data object and is currently waiting for access to the data object. Additionally, the mechanism maintains a list optimize control identifying whether one of the plurality of access requests is currently optimizing a waiters list of access requests waiting to access to the data object.

REFERENCES:
patent: 5285528 (1994-02-01), Hart
patent: 5826253 (1998-10-01), Bredenberg
patent: 2004/0199734 (2004-10-01), Rajamani et al.
patent: 2005/0234989 (2005-10-01), Bailey et al.
Bacon, D.F., et al., “Thin Locks: Featherweight Synchronization for Java,”Proceedings of the ACM Conf. on Programming Language Design and Implementation, SIGPLAN Notices vol. 33(6), Montreal, Canada, Jun. 1998.
Mellor-Crummey, J.M., et al., “Synchronization Without Contention,”Proceedings of the 4th Int'l Conf. on Architectural Support for Programming Languages and Systems, Santa Clara, Calif., Apr. 1991, pp. 269-278.

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