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A Portable, Extensible and Efficient Implementation of Proactor Pattern
BibTeX
@MISC{Arulanthu_aportable,,
author = {Alexander Babu Arulanthu and Irfan Pyarali and Douglas C. Schmidt},
title = {A Portable, Extensible and Efficient Implementation of Proactor Pattern},
year = {}
}
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Abstract
The Proactor pattern [1] describes how to structure applications and systems that effectively utilize asynchronous mechanisms supported by operating systems. When an application invokes an asynchronous operation, the OS performs the operation on behalf of the application. This allows the application to have multiple operations running simultaneously without requiring the application to have a corresponding number of threads. Therefore, the Proactor pattern simplifies concurrent programming and improves performance by requiring fewer threads and leveraging OS support for asynchronous operations. The Adaptive Communications Environment (ACE) [2] has implemented a Proactor framework that encapsulates I/O Completion Ports of Windows NT operating system. This ACE Proactor abstraction provides an OO interface to the standard C APIs supported by Windows NT. We ported this Proactor framework to Unix platforms that support POSIX4 asynchronous I/O calls and real-time signals. This paper describes the design and implementation of this new Portable Proactor framework and explains how the design and the implementation have been made so that the framework can be extensible, scalable and efficient. We explain how our design took care of keeping the old interfaces of the framework intact, still making the design highly extensible and efficient. The source code for this implementation can be acquired from the ACE website at www.cs.wustl.edu/#schmidt/ACE.html.
Keyphrases
proactor pattern efficient implementation proactor framework asynchronous operation window nt proactor pattern simplifies improves performance o support asynchronous mechanism standard apis oo interface old interface structure application multiple operation adaptive communication environment source code new portable proactor framework real-time signal ace proactor abstraction ace website corresponding number schmidt ace completion port
