Latch mechanism for concurrent computing environments

Details Latch mechanism for concurrent computing environments Latch mechanism for concurrent computing environments

2006-03-14

2006-03-14

An, Meng-Al T. (Department: 2195)

Electrical computers and digital processing systems: virtual mac

Task management or control

Reexamination Certificate

active

07013463

ABSTRACT:
A system, method and computer readable medium containing programming structions for an improved latch mechanism for use in a programming environment running concurrent tasks is disclosed. According to one aspect of the present invention, a latch is provided to a first task which is requesting access to a resource. After such access, the first task holds the latch, which is also released from the first task. The first task holding the latch marks the latch stealable, and if the latch is not marked stolen by another task, the first task can mark the latch unstealable. In another embodiment of the present invention, if the first task is provided a latch marked stealable, the resource associated with the stealable latch will be placed in a consistent state before the first task accesses the resource.

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“Cycle Steal at Rename Register,” IBM Technical Disclosure Bulletin, Thomson Delphion, pp. 1-2.
“Space Recovery When Concurrently Linking Program Modules,” IBM Technical Disclosure Bulletin, Thompson Delphion, pp. 1-3.

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