[Pharo-project] Fwd: [vwnc] Would you start a new Smalltalk project today?
bschwab at anest.ufl.edu
Sun Mar 22 19:06:39 EDT 2009
Semaphores and Mutexes are the lower level tools. **Critical sections** implemented in terms of blocks are the fantastic part.
The little that I know about functional languages and their immutable data structures suggests that a LOT of copying occurs. That has to be expensive in terms of scheduling and memory footprint.
Wilhelm K. Schwab, Ph.D.
bschwab AT anest DOT ufl DOT edu
From: pharo-project-bounces at lists.gforge.inria.fr [mailto:pharo-project-bounces at lists.gforge.inria.fr] On Behalf Of Antony Blakey
Sent: Sunday, March 22, 2009 5:40 PM
To: Pharo-project at lists.gforge.inria.fr
Subject: Re: [Pharo-project] Fwd: [vwnc] Would you start a new Smalltalk project today?
On 23/03/2009, at 7:37 AM, Michael van der Gulik wrote:
> Anybody who relies on the behaviour of the scheduler deserves to be
> forced to program in BASIC. Semaphores work; use them.
And they work with native threads, which was my point. A more pedantic answer to your response is that you take advantage of the scheduler all the time when considering priorities and atomicity, but I agree with the intent of your statement.
> Smalltalk, the language rather than the implementation, already has
> fantastic support for concurrency. Smalltalkers just don't know how to
> use it. We don't need to rethink the model, we just need to learn to
> use what we have.
Mutexes and semaphores are hardly 'fantastic'. The state of the art in support for concurrency is way beyond what Smalltalk provides - locking is both primitive and generally not scalable.
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