Squeak-dev January 2001

squeak-dev@lists.squeakfoundation.org

112 participants
318 discussions

Re: Professor seeking sabbatical niche
by Stephane Ducasse 03 Jan '01

03 Jan '01

Hi Andrew We have a team full of Smalltalker and some Squeakers like nathanael that built Genie the new handrecognition character. I invited John maloney but I suspect that Alan will never let him come. We can host you we have place, computer and fun. People around speak english, Switzerland is in the middle of europe: 4,3h by train from Paris, 6 to Florence, 6 to Nice.... I would really like to host you for your sabbatical. Oscar and some students are building picola a distributed oo language for scripting written in Java and Squeak. I'm and the rest of the team are working on reengineering. programm understanding.... look at http:/www.iam.unibe.ch/~scg/ click alos on our wiki Tell me if you want to know more. Stef > Resent-date: Tue, 02 Jan 2001 07:52:40 +0000 > Date: Mon, 01 Jan 2001 23:46:26 -0800 > Resent-from: squeak(a)cs.uiuc.edu > From: "Andrew P. Black" <black(a)cse.ogi.edu> > Subject: Professor seeking sabbatical niche > Resent-sender: squeak-request(a)cs.uiuc.edu > X-Sender: black(a)mailhost.cse.ogi.edu > To: Squeak Mailing List <squeak(a)cs.uiuc.edu> > Resent-cc: recipient list not shown: ; > Resent-message-id: <qdEYJD.A.ChD.IjYU6(a)jerry.cs.uiuc.edu> > MIME-version: 1.0 > Content-transfer-encoding: 7BIT > X-Loop: squeak(a)cs.uiuc.edu > X-Mailing-List: <squeak(a)cs.uiuc.edu> archive/latest/27614 > > I hope that this is not an inappropriate request to place on this > list -- if it is, please flame me privately ;-) > > I'm a professor at the Oregon Graduate Institute, and my interest in > Squeak has been growing steadily as I do more and more with it. But > there is no Squeak "community" here at OGI. I have a sabbatical > coming up next academic year (October 2001 onwards), and I would like > to spend some part of it doing something that deepens my knowledge of > Squeak, and hopefully contributes to the Squeak environment. Oh--and > is fun! > > Most likely, this would be some not-for-profit activity, perhaps one > that draws on my interests in distributed systems, and contributes to > the Squeak source pool; for this I would expect to get at least > partial salary support from my University. But I would also be > interested in doing some commercial O-O development in Squeak, > particularly as part of an XP team. > > See my web page at http://www.cse.ogi.edu/~black for more information about me. > If you might be interested in talking further about my participation > on your project, please contact me (off the list) > mailto:black@cse.ogi.edu > > Although October seems like a long way off, I do need to make plans > fairly quickly with the University. At this point I'm looking for > expressions of interest rather than a firm commitment. > > Andrew > Stephane DUCASSE (ducasse(a)iam.unibe.ch) http://www.iam.unibe.ch/~ducasse/ "if you knew today was your last day on earth, what would you do different? ... especially if, by doing something different, today might not be your last day on earth" Calvin&Hobbes University of Bern, Institut fuer informatik and Mathematik IAM-SCG, 10 neubruckstrasse, CH-3012 Bern, Switzerland.

1 0

Re: Squeak under MacOS X
by Marcel Weiher 03 Jan '01

03 Jan '01

> From: "Roger Vossler" <rvossler(a)uswest.net> > > Howdy, > Does Squeak 2.8 or 2.9 run OK under the Classic environment > of MacOS X (PB at this point). Or, has it been Carbonized? Any > plans for a natice Cocoa implementation? Thanks for any info? In addition to the Classic + Carbon versions, there is a Cocoa implementation maintained by myself, available from http://www.metaobject.com/downloads/Squeak/ I spent some time over the holidays giving this VM a major overhaul, and will be posting an update as soon as we have completed the switch-over of our web-server to a new machine. This overhaul fixes some bugs with modifiers keys not working properly and the cursor-image changes not showing up, as well as improving display speed somewhat. However, display speed is still less than stellar, due in large part to Quartz simply not being optimized yet. I expect this to improve for GM, and am also exploring alternatives such as the direct-access APIs as well as OpenGL. The Squeak VM is now encapsulated in an Objective-C object, class SqueakInterpreter. This object provides an API for access to Squeak, as well as I/O services for the Squeak VM. This encapsulation as well as the fact that both the generated code and the Objective-C cover reside in the Squeak framework mean that it is now fairly easy to include a Squeak interpreter in your custom application. The Squeak.app itself, for example, is just a fairly thin wrapper that manipulates the SqueakInterpreter object from the framework (exception: the display code, but that will probably be moved to a SqueakUI framework soon). To run a Squeak interpreter with an image: id interpreter = [SqueakInterpreter interpreter]; [interpreter readImageFile: @"great.image" withHeapSize: 64 * 1024 * 1024]; [interpreter startInterpreter]; or [interpreter startInterpreterInSeparateThread]; That would be a headless interpreter, and due to all the global variables in the generated code, you can only run a single (shared) instance at a time. One solution to that problem is to generate the interpreter as an Objective-C class/object instead, turning the current global variables into instance variables of the object. The Objective-C generator code I've started working on again now generates a compilable Interpreter class (subclass of ObjectMemory), and I am fairly sure that I am not too far away from a runnable version. At that point, I will be able to eliminate that pesky C glue code, and have the interpreter send messages to its VM. Another one of the next steps will be a really simple and somewhat restricted call-in facility to Squeak based on the event mechanism. That together with the (separate) call-out facility of the Objective-C bridge should be enough to at the very least experiment with integrating Squeak and Cocoa. Marcel

2 1

Re: Squeak 2.9 on ARM with optimizations
by Kevin Fisher 03 Jan '01

03 Jan '01

> Kevin Fisher <kgf(a)golden.net> is widely believed to have written: > > > > What versions of GCC are being used between the two Netwinders, I wonder? > Excellent question. I hope to have time to find an answer soon. > The build farm uses gcc version 2.95.1 19990816 (release). I believe this is the version the Netwinder site mentioned as well. > > I'll see what I can do..right now I'm trying to get OSProcess working with my > > shrunken image so I can completely do away with the window manager on the > > iPaq...that way I can call /sbin/shutdown and whatever else (the irda stuff?) > > right from Squeak. It would be nice be able to do away with X as well, but > > one step at a time... ;) > I have some code from doing the original Itsy port that might help > there, especially combined with the FxBlt/ExternalSurface stuff. Let me > know when you get to that point. > That would be great! I had suspected that some direct framebuffer code had to exist somewhere (I wasn't sure if the SqueakNOS folks had gotten that far yet). I was wondering about the relationship of the iPaq to the Itsy...it is a direct relative is it not? The Linux build I'm using is called 'Bitsy'. > tim > > -- > Tim Rowledge, tim(a)sumeru.stanford.edu, http://sumeru.stanford.edu/tim > It's 10 o'clock. Do you know where your child processes are?

1 0

Squeak 2.9 on ARM with optimizations
by Kevin Fisher 03 Jan '01

03 Jan '01

Just a quick follow-up to the earlier discussion about compiling Squeak on ARM with optimizations.... I went back and rebuilt the VM, omitting optimizations for the module that causes the problems with GCC-ARM (SoundCodecPlugin.c). When I try to start an image with the resulting VM however, I get an illegal instruction and it dies. SoundCodecPlugin.c is the only module that triggers the bug in GCC. So, until I can get into an environment with an up-to-date ARM toolchain, the iPaq benchmarks on Linux with optimization will have to wait for a while. I'll try signing on to the handhelds.org mailing list and post a query about the toolchain on their build farm...I imagine they'll update it someday. (So for now, the gauntlet must remain where it is.. :)

2 3

Re: ["BUG"][FIX?]Incorrect Pseudo-Codefor#whileTrue:/#whileFalse:?
by Stephan Rudlof 02 Jan '01

02 Jan '01

Andrew, "Andrew C. Greenberg" wrote: > <snipped> > > I see no virtue in the code as it exists there -- it is semantically > confusing and perhaps meaningless outside the context of a special > inlining compiler. While the code works, it cannot be explained or > understood without reference to the generated bytecodes -- this is > not (or perhaps should not be) the Smalltalk way. > What do you think of my suggestion given in an earlier mail in this thread? Do you see a problem here? Greetings, Stephan >From VisualWorks® NonCommercial, Release 5i.1 of January 24, 2000: --- BlockClosure>> whileTrue: aBlock "Evaluate the argument, aBlock, as long as the value of the receiver is true." ^self value ifTrue: [aBlock value. [self value] whileTrue: [aBlock value]] "This method is inlined if both the receiver and the argument are literal blocks. In all other cases, the code above is run. Note that the code above is defined recursively. However, to avoid actually building an activation record each time this method is invoked recursively, we have used the '[...] whileTrue: [..]' form in the last line, rather than the more concise 'self whileTrue: aBlock'. Using literal blocks for both the receiver and the argument allows the compiler to inline #whileTrue:, which (in the absence of type inferencing) could not be done if we were to use 'self whileTrue: aBlock'." --- This variant avoids recursion if the compiler inlines literal blocks *and* should work without inlining - though very inefficient regarding time and memory (more inefficient than Andrew's suggestion) -, too. -- Stephan Rudlof (sr(a)evolgo.de) "Genius doesn't work on an assembly line basis. You can't simply say, 'Today I will be brilliant.'" -- Kirk, "The Ultimate Computer", stardate 4731.3

1 0

floatAt:put: problems on Linux?
by John Chludzinski 02 Jan '01

02 Jan '01

In my workspace I enter the following codet: | x | x _ ByteArray new: 12. x floatAt: 4 put: 2.4 When I try to execute this fragment I get a primitiveFailed message when running on Linux. It's part of my code on Win2K and I have NO problems there (on Win2K). I tried downloading and installing libffi_1.20.tar.gz as was recommended but to NO avail. Any suggestions? ---John

1 0

Re: Squeak book shipping from Amazon.com
by Conrad Taylor 02 Jan '01

02 Jan '01

Hi, I was wondering, which book should a person new to Squeak Smalltalk buy? Anyway, the following books appeared from an Amazon.com query: Squeak: Object-Oriented Design with Multimedia Applications by Mark Guzdial Squeak : Open Personal Computing and Multimedia by Mark Guzdial et al Thanks in advance, -Conrad --- Mark Guzdial <guzdial(a)cc.gatech.edu> wrote: > I came home on New Year's Eve to find my box of 'em, > and I'm getting > email from folk finding them in their local > bookstores. Amazon says > that they're now shipping within 24 hours of new > orders -- but they > dropped Rik's wonderful review of the book! BUMMER! > > Funny story: Our campus Prentice-Hall sales rep is > forever sending > me books to consider for my course -- C++ books, > Java books, etc. > You'd think that s/he (it's changed over the last > year) would realize > what language I use since I'm writing a *SQUEAK* > book for them. > Finally, they got it right. They sent my own book > to me for > examination :-) > > And the manuscript for the SqueakBook at > http://coweb.cc.gatech.edu/squeakbook goes to P-H > today... > > Happy New Year! > Mark > > >It should arrive on Tuesday. > > > >Boy, oh, boy! > > > >Happy new year to everyone. > > > >8-) > > > > > >-- > > > ************************************************** > > Jeff Szuhay A randomly-directed > > www.szuhay.org chaotical wetware > pattern > > jeff(a)szuhay.org recognizer/generator. > > > > > > This year will go down in history. For the first > time, > > a civilized nation has full gun registration. > Our streets > > will be safer, our police more effective, and > the world > > will follow our lead into the future." > > -- Adolf Hitler, Chancellor and F�hrer of > Germany, 1935 > > -------------------------- > Mark Guzdial : Georgia Tech : College of Computing : > Atlanta, GA 30332-0280 > Associate Professor - Learning Sciences & > Technologies. > Collaborative Software Lab - > http://coweb.cc.gatech.edu/csl/ > (404) 894-5618 : Fax (404) 894-0673 : > guzdial(a)cc.gatech.edu > http://www.cc.gatech.edu/gvu/people/Faculty/Mark.Guzdial.html > > . > c.gatech.edu/gvu/people/Faculty/Mark.Guzdial.html > > . > __________________________________________________ Do You Yahoo!? Yahoo! Photos - Share your holiday photos online! http://photos.yahoo.com/

2 1

Squeak under MacOS X
by Roger Vossler 02 Jan '01

02 Jan '01

Howdy, Does Squeak 2.8 or 2.9 run OK under the Classic environment of MacOS X (PB at this point). Or, has it been Carbonized? Any plans for a natice Cocoa implementation? Thanks for any info? Cheers, Roger.....

4 3

Re: ["BUG"][FIX?]Incorrect Pseudo-Code for #whileTrue:/#whileFalse:?
by merlyn＠stonehenge.com 02 Jan '01

02 Jan '01

>>>>> "Andrew" == Andrew C Greenberg <werdna(a)mucow.com> writes: Andrew> It's possible that I'm just not getting it, but it would appear that Andrew> the pseudo-code for #whileTrue; and #whileFalse: is incorrect. Even Andrew> if I were right, it is still the height of pedantry on my part to call Andrew> this a bug, since the code is never executed due to compiler inlining. Andrew> Nevertheless, perhaps it would be more aesthetically pleasing to have Andrew> pseudo-code here that would work if the compiler did not inline loops? Andrew> The present code in BlockContext is: >> whileTrue: aBlock >> "Ordinarily compiled in-line, and therefore not overridable. >> This is in case the message is sent to other than a literal block. >> Evaluate the argument, aBlock, as long as the value of the >> receiver is true." >> >> ^ [self value] whileTrue: [aBlock value] Andrew> But it would appear to me that this code would infinite loop for so Andrew> long as these valuations do not result in a walkback. In either case Andrew> the behavior appears both undefined and incorrect for most Andrew> BlockContext instances and arguments. Perhaps something like the Andrew> following would yield the desired result? Andrew> ^ self value ifTrue: [aBlock value. self whileTrue: aBlock] Andrew> (and in the case of #whileFalse, use #ifFalse instead). It's very likely that the author of BlockContext>>whileTrue: knew and was counting on the compiler to in-line the call, and never call the method explicitly, *even for* the code in the method! In that case, the code in the method is executed only for a #perform:... and in fact, the code executed is appropriately optimized. Your change makes sense if the compiler did not recognize this as a special case, although it would suffer from recursion trouble if there was no tail-recursion optimization (which there isn't, if I recall from the last time I asked about this same thing). -- Randal L. Schwartz - Stonehenge Consulting Services, Inc. - +1 503 777 0095 <merlyn(a)stonehenge.com> <URL:http://www.stonehenge.com/merlyn/> Perl/Unix/security consulting, Technical writing, Comedy, etc. etc. See PerlTraining.Stonehenge.com for onsite and open-enrollment Perl training!

2 2

RE: RE: Looking for a copy of my own documentation
by Jarvis, Robert P. (Contingent) 02 Jan '01

02 Jan '01

Thanks for the pointer. Someone else found this and posted the link to one of the lists. I guess I didn't hunt around enough. I apologize for any confusion or problems I may have caused. Bob Jarvis Compuware @ Timken > -----Original Message----- > From: Bruce Boyer [mailto:bboyer99@mediaone.net] > Sent: Saturday, December 30, 2000 5:05 PM > To: Jarvis, Robert P. (Contingent); squeak(a)cs.uiuc.edu; > vwnc(a)cs.uiuc.edu > Subject: RE: RE: Looking for a copy of my own documentation > > > I've not been monitoring the squeak list for a while, and missed > this. Thanks for cross-posting to vwnc. Are you referring to: > > http://www.cincom.com/smalltalk/MVC_K&P.pdf > > It was originally posted on the ObjectShare site, and resently > reposted on the Cincom site (once we got it set up a few months > ago), and I expect it to be there for the foreseeable future. > > Bruce > > > -----Original Message----- > > From: Jarvis, Robert P. (Contingent) [mailto:Jarvisb@timken.com] > > Sent: Friday, December 29, 2000 12:05 PM > > To: 'squeak(a)cs.uiuc.edu'; 'vwnc(a)cs.uiuc.edu' > > Subject: RE: RE: Looking for a copy of my own documentation > > > > > > Uh...take 2... > > > > Because of copyright considerations I'm not going to put the MVC > > paper on my > > web site. (Note: nobody from Cincom, nor either of the authors, > > has said a > > word to me - I'm just taking the "better safe then > irritated" route). I'm > > hoping that SOMEONE AT CINCOM (<hint-hint> <nudge-nudge>) > will get this > > paper posted at the Cincom site. > > > > On the bright side, I've started to finally get my web site > cleaned up... > > :-) > > > > Bob Jarvis > > Compuware @ Timken > > > > > -----Original Message----- > > > From: Jarvis, Robert P. (Contingent) > > > Sent: Friday, December 29, 2000 2:01 PM > > > To: 'squeak(a)cs.uiuc.edu' > > > Subject: RE: RE: Looking for a copy of my own documentation > > > > > > > > > Down at the bottom of your translated page it says > > > > > > Copyright © V.A. Savel'ev, 1999-2000 > > > > > > Somebody (at Cincom? STP?) should probably grab a copy of the > > > Krasner/Pope paper before it disappears. I've saved a copy > > > on my local hard drive now, and I'll try to have it up on my > > > web site by the end of the day (http://www.nls.net/mp/jarvis). > > > > > > Bob Jarvis > > > Compuware @ Timken > > > > > > > -----Original Message----- > > > > From: Bob Arning [mailto:arning@charm.net] > > > > Sent: Friday, December 29, 2000 12:53 PM > > > > To: Jarvis, Robert P. (Contingent); squeak(a)cs.uiuc.edu > > > > Subject: Re: RE: Looking for a copy of my own documentation > > > > > > > > > > > > On Fri, 29 Dec 2000 11:28:02 -0500 "Jarvis, Robert P. > > > > \(Contingent\)" <Jarvisb(a)timken.com> wrote: > > > > >Just about every link I find to your paper points to the > > > > ObjectShare site, > > > > >which is pretty much defunct. Fortunately someone in Russia > > > > (sorry, I don't > > > > >read Cyrillic so I don't know how) copied the entire PDF to > > > > their site. > > > > >Here's the link: > > > > > > > > > >http://www.math.rsu.ru/smalltalk/gui/mvc_krasner_and_pope.pdf > > > > > > > > I don't even have Cyrillic fonts, but I did find a > > > conversion utility > > > > > > > > http://www.friends-partners.org/~isandler/cyrconv/cyrconv.html > > > > > > which produced a transliterated page which I have stashed at > > > > > > http://209.143.91.36/super/48 > > > > > > Doesn't appear to say who saved the sole remaining copy of > > > this important document. > > > > > > Cheers, > > > Bob > > > > > >

2 1

Jump to page: