General talk about software patterns

[Russ Rufer <russ AT pentad.com>]

Yes, there's a wealth of information in Real-Time Design Patterns, and as I recall, it's a good read too. Here's a link to a sample chapter:

   Real-Time Design Patterns - Chapter 7 "Resource Patterns"
   By Bruce Powel Douglass
   http://www.cuj.com/documents/s=8204/cujweb0306douglass/resource_patterns.pdf

<aside: Dave, thanks so much for your support when I was starting the Silicon Valley Patterns Group back in '98--we're still going strong with weekly meetings!>

- Russ


Isaacs, David wrote:

 
I am curious if anyone has experience with the following book by 
Bruce Douglass:
"Real-Time Design Patterns: Robust Scalable Architecture for Real-Time Systems"

At one point, I intended to read the book as soon as it was available but then
I left for a non-real-time project and have not ventured back into that
world...

Any opinions on that book?
-Dave-

-----Original Message-----
From: patterns-discussion-bounces AT cs.uiuc.edu [mailto:patterns-discussion-bounces AT cs.uiuc.edu] On Behalf Of Andre Benassi
Sent: Tuesday, March 29, 2005 9:02 AM
To: Christophe Addinquy; patterns-discussion AT cs.uiuc.edu
Subject: Re: RE : [patterns-discussion] Using Design Patterns without dynamic memoryallocation

Hi Christophe,

Thanks for yours and everyone else's replies, they have been very helpful and encouraging.

Interestingly enough, I have been tossing around what you have stated in your first answer - this seems to really be an under-represented subject; it would really be useful to a lot of people to understand how to apply design patterns to embedded systems. 
Especially since (in my opinion and experience) a lot of people designing and writing software for real-time systems come from an electrical engineering background (like me) and were not heavily trained in computer science concepts.  They also tend to be more classically trained (read: structural software) and do not have a strong background in OOP.

I'll take a look at the book you mentioned.

Thanks a lot!

André Benassi

--- Christophe Addinquy
<Christophe.Addinquy AT valtech.fr> wrote:
  

Hi Ralph,
 
You've already received construtive answers, I think. I will try to 
add a little bit, if possible...
 
I will split my answer in 2 parts:
1) can we use DP without dynamic memory allocation ?
2) Is the pattern approach something useful in your case ?
 
1) obviously, DP isn't about dynamic memory allocation, but make an 
extensive use of this facility. For the patterns that use stateless 
objects (the strategy, for example), it should be quite 
straightforward to move to an implementation based on static shared 
object. For the other ones, it's probably more challenging. But, if 
you reach it, you have the meat for a good paper ;)
 
2) Don't forget that implementation, in the DP is just an example ! 
The important things, in the DP
are:
  a) The DP is a solution to a problem in a given context
  b) The solution should be regarded as the "essence of the solution". 
The concrete solutions are possibles variations around this "essence".
 
Look also outside the GoF book, you may find things interesting for 
you. James Noble & Charles Weir have written "patterns for small 
memory software" which target embedded devices like PDA, cell phones, 
etc... You may find this material suitable for you.
 
Regards,
 
 
Christophe Addinquy

	-------- Message d'origine-------- 
	De: Ralph Malph [mailto:ralph_malph AT yahoo.com] 
	Date: mar. 29/03/2005 00:22 
	À: patterns-discussion AT cs.uiuc.edu 
	Cc: 
	Objet: [patterns-discussion] Using Design Patterns without dynamic 
memoryallocation
	
	

	Hello all, looking at archives I'm not sure how
	"alive" this list is, but someone out there might be
	listening.
	
	I'm interested in people's opinions as to whether
	design patterns would be useful if you could not
	dynamically allocate memory. 
	
	I am new to patterns and find them quite interesting.
	I am considering putting in some effort to comprehend
	them, but my projects at work include embedded
	safety-critical real-time systems, and one of the
	things that we do not use is dynamic memory
	allocation.
	
	If anyone has an opinion as to whether I should delve
	into patterns for this type of software (i.e. you have
	considered doing them and/or done them in similar
	systems before) I'd be interested to hear it.
	
	Thanks!
	
	
	               
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