Apparatus for inter-process/device communication for multiple sy

Details Apparatus for inter-process/device communication for multiple sy Apparatus for inter-process/device communication for multiple sy

1992-10-05

1996-04-30

Auve, Glenn A.

395650, 395826, 39520013, G06F 900

Patent

active

055133282

ABSTRACT:
An apparatus for inter-process/inter-device communication in a system of multiple asynchronous devices which uses processing resources efficiently by adhering to an event driven software architecture. An event driven architecture requires that every process have a single blocked input and no blocked outputs, and that all communication between processes take place through a common routing mechanism. The apparatus uses a streams facility, which is commonly used to handle devices, to make processes see the common routing mechanism as a device driver within the streams facility. This common process driver is linked to each real device driver via either a device process set, a polling support service or a half duplex flip-flop, depending upon the nature of the device driver, so as to minimize use of processing resources for communications with real devices.

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AT&T, UNIX Operating System Manual, 1986; "Programmer's Guide: Shared Memory", pp. 9-78 to 9-83.
AT&T, UNIX Operating System Manual, 1986; "Streams Programmer's Guide: Basic Operations", pp. 1-1 to 1-10.
Roger S. Pressman, Software Engineering: A Practioner's Approach, 2nd Edition (McGraw Hill, 1987); pp. 367 to 375.

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