[kepler-dev] concurrency libraries for jdk 1.4

[Edward A. Lee]

Possibly of interest:  Thomas Feng, Yang Zhao and I have checked
in to the CVS tree a new domain, called "rendezvous", that uses
extensions of CSP to get multithreaded programs that communicate
by rendezvous. It has a small library of actors supporting conditional
rendezvous, barrier synchronization, and buffering. All ordinary
Ptolemy II actors should work fine with the RendezvousDirector.

Together with the PNDirector, I'm guessing that these two provide
the capabilities you would get from a thread library, but at
a better level of granularity and abstraction.  But I would be
interesting in hearing opinions to the contrary (or better, examples
of things that become hard to do).

Edward


At 08:35 AM 11/15/2005 -0600, Kevin Ruland wrote:

>Hi all.
>
>Yesterday I suggested we try to utilize a concurrency library within
>Kepler.  This will help us reduce the volume of thread critical code
>which we need to write and hopefully provide us with more threading
>primitives than provided by the jdk itself (which is almost none).
>There are two libraries which I've dug up which could satisfy this need.
>
>Doug Lea's util.concurrent package
>http://gee.cs.oswego.edu/dl/classes/EDU/oswego/cs/dl/util/concurrent/intro.html
>.  This is the basis of the concurrency library introduced in Java 5.
>He notes that this package has been reduced to maintenance fixes only
>because it has been superceded by Java 5.  He also refers us to the
>second package...
>
>Backport of Java 5 concurrency library to Java 1.4.
>http://gee.cs.oswego.edu/dl/classes/EDU/oswego/cs/dl/util/concurrent/intro.html
>This library does appear to have some offical sanctions by the JSR 166
>Expert Group (the jsr which introduced java.util.concurrent  into java
>5) which is a good sign.  It should also ease a transition to true java
>5 at some time in the future.
>
>Kevin
>_______________________________________________
>Kepler-dev mailing list
>Kepler-dev at ecoinformatics.org
>http://mercury.nceas.ucsb.edu/ecoinformatics/mailman/listinfo/kepler-dev

------------
Edward A. Lee
Professor, Chair of the EE Division, Associate Chair of EECS
231 Cory Hall, UC Berkeley, Berkeley, CA 94720
phone: 510-642-0253 or 510-642-0455, fax: 510-642-2845
eal at eecs.Berkeley.EDU, http://ptolemy.eecs.berkeley.edu/~eal