Cancellation mechanism for cooperative systems

Details Cancellation mechanism for cooperative systems Cancellation mechanism for cooperative systems

2005-05-16

2009-10-20

Sough, Hyung S (Department: 2194)

Electrical computers and digital processing systems: interprogra

Remote procedure call

C719S315000, C709S203000

Reexamination Certificate

active

07607142

ABSTRACT:
Object invocation may be carried out by one thread in a service which may include multiple executing threads. In a mechanism for implementing a cancellation operation in a cooperative system, a thread identifies an operation to be cancelled. A cancel function has an argument comprising the thread identifier in which the operation is to be cancelled. The cancel function is called by a client process thread to cancel a pending object invocation initiated by the client process. An immediate or hard cancel causes the targeted client and cancel thread to return immediately. A discretionary or soft cancel does not affect the targeted client thread. In either case the server process is notified via a maintenance notification. The target thread of the cancel cannot be reused for other work until the cancel request or notification has returned.

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