• Mark Evans (29/35) Sep 06 2003 Before I go on permanent vacation from D news, I should
• Walter (3/4) Sep 07 2003 Why? You're a very valued contributor here!
• Ilya Minkov (5/7) Sep 07 2003 You have been the major source of our horizons expansion. And i guess
• Sean L. Palmer (4/13) Sep 07 2003 Thanks so much for all the links and insights. I wish you the best.

Mark Evans <Mark_member pathlink.com> writes:

Daniel Y. wrote
 It's almost impossible to come with a good concurrency
 system for an imperative language like D. Java's model
 sucks, and to write a better model we need to (AFAICT):
 either lots of primitives and go the Ada way, or use a
 Actor-like model. IMO it's better to define the
 concurrency in the libraries and hope for the best ;)

Before I go on permanent vacation from D news, I should
address the claim that good concurrency in imperative
languages, specifically Java, is "almost impossible."
My counterclaim will be Flow Java as cited by
Peter Van Roy of Mozart/Oz fame (scroll down):
http://lambda.weblogs.com/discuss/msgReader$7453

So, good concurrency can indeed mesh with imperative
languages like Java (and D).  It doesn't take radical
surgery, either.  The Flow Java extension is described
as conservative and moderate.

Note, I am not claiming that concurrent operations will
be done in an imperative style, just correcting the
statement that implementation & design is hard.

The Armstrong talk is worthwhile for some real-world
concurrency case studies.  Relevant to D is that
Erlang is used in commercial firmware, which presumably
would be one of D's targeted domains (aspiring as it
does to be a new systems language).

My interest in dataflow concurrency is more than theory.
I have used it extensively in LabVIEW work.  LabVIEW
gives concurrency for free.  Independent data flows run
concurrently without special instructions.

It appears we must wait for more documentation on Flow
Java.  The point here is that the Java integration job
has been done, not merely talked about.  I expect LtU
will run a feature on it eventually.

May your horizons ever expand and good luck to all-
Mark

"Walter" <walter digitalmars.com> writes:

"Mark Evans" <Mark_member pathlink.com> wrote in message
news:bjehpd$1q1n$1 digitaldaemon.com...
 Before I go on permanent vacation from D news,

Why? You're a very valued contributor here!

Ilya Minkov <minkov cs.tum.edu> writes:

Mark Evans wrote:

 May your horizons ever expand and good luck to all-
 Mark

You have been the major source of our horizons expansion. And i guess 
that since people forget things, if the horizon doesn't keep expanding, 
it will automatically contract. :(

-eye

"Sean L. Palmer" <palmer.sean verizon.net> writes:

Thanks so much for all the links and insights.  I wish you the best.

Sean

"Mark Evans" <Mark_member pathlink.com> wrote in message
news:bjehpd$1q1n$1 digitaldaemon.com...
 Before I go on permanent vacation from D news, I should
 address the claim that good concurrency in imperative
 languages, specifically Java, is "almost impossible."
 My counterclaim will be Flow Java as cited by
 Peter Van Roy of Mozart/Oz fame (scroll down):
 http://lambda.weblogs.com/discuss/msgReader$7453
...
May your horizons ever expand and good luck to all-
 Mark