Non-locking queueing mechanism for enabling a receiver device to

Details Non-locking queueing mechanism for enabling a receiver device to Non-locking queueing mechanism for enabling a receiver device to

1987-12-29

1990-12-25

Wiliams, Jr., Archie E.

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36492792, 3649314, 36493146, 364933, 3649336, 364940, 3649409, 36494062, 364965, 3649261, 3649263, 36492692, 3649311, 36493148, 3649328, 3649332, 364934, 3649342, 36493543, 364939, G06F 1202, G06F 1312, G06F 506

Patent

active

049808524

ABSTRACT:
A non-locking queueing mechanism is described for transferring information from a sending unit to a receiving unit through a queue in which there is no interference between the independent units (sender and receiver) during enqueueing or dequeueing. The invention thus avoids any form of interlock or serialism. The mechanism includes a first pointer (D), identifying the element area in the queueing device where the last dequeued information element, if any, was located, and a second pointer register for logging a second pointer (E) identifying the element area in the queueing device where the last enqueued information element, if any, was located, a first control block activated by the sending unit to enqueue the information element into the queueing device and for updating the second pointer, and a second control block activated by the recieving unit to dequeue the information element from the queueing device and for updating the first pointer.

REFERENCES:
patent: 4040027 (1977-08-01), van Es et al.
patent: 4402046 (1983-08-01), Cox et al.
patent: 4783730 (1988-11-01), Fischer
patent: 4794521 (1988-12-01), Ziegler et al.
IBM Technical Disclosure Bulletin, vol. 15, No. 8, Jan. 1973, pp. 2495-2496, L. B. Baumer, Read-Only Memory Controlled Buffering.

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