Squeak-dev January 2007

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160 participants
184 discussions

About Squeak Planets
by Giuseppe Luigi Punzi 30 Jan '07

30 Jan '07

Who is the owner of the planets[1]? I think it's not updated, at least, the spanish planet. I remember I wrote to the site contact [2] but never get an answer. Cheers. [1] http://planetes.squeak.org/ [2] simonNOSPAM(at)joyful(dot)com

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The Weekly Squeak Summary No. 9: Jan 7 - Jan 27, 2007
by Michael Haupt 29 Jan '07

29 Jan '07

Dear Squeakers, welcome to the The WeeklySqueakSummary, a irregular traffic-dependent report on what's going on in the world of Squeak based on the WeeklySqueak blog. Highlights of the past weeks: Scratch [5] is a programming language for creating multimedia content developed at MIT Media Lab; the project was led by John Maloney. SeaChart [2] allows for creating all kinds of charts using Seaside. Moreover, SeaChart also supports fading image slide shows and clickable star raters. The examples on the SeaChart web page are impressive, and even more so given that the code used to generate them (all to be seen on the page) is so concise. ActiveRecord [3] supports almost automatic persistence. Ramon Leon's implementation for Squeak creates Glorp descriptions from Magritte meta-data. The past weeks' news items: [1] MousePhone http://weeklysqueak.wordpress.com/2007/01/11/mousephone/ [2] Charting Seaside http://weeklysqueak.wordpress.com/2007/01/13/charting-seaside/ [3] A Smalltalk ActiveRecord using Magritte, Seaside, and Glorp http://weeklysqueak.wordpress.com/2007/01/16/a-smalltalk-activerecord-using… [4] Smalltalk developer in Belgium http://weeklysqueak.wordpress.com/2007/01/18/smalltalk-developer-in-belgium/ [5] Scratching the Surface http://weeklysqueak.wordpress.com/2007/01/23/scratching-the-surface/ [6] Looking For A Shortcut? http://weeklysqueak.wordpress.com/2007/01/26/looking-for-a-shortcut/ You can find this and much more on The WeeklySqueak blog, the newsblog dedicated to the world of Squeak: http://news.squeak.org/ Subscribe to the WeeklySqueak RSS feed: http://news.squeak.org/feed/ Happy squeaking, Michael

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Disk information
by Martin Troielli 29 Jan '07

29 Jan '07

Hi all, Is there a way to obtain hard disk info (label, serial number) where is squeak installed? Or a way to obtain a unique machine/system id? Many thanks, Martin -- Ing. Martín Troielli - martin(a)psiware.com.ar psiware | desarrollo de software tel. +54 (341) 411-3966, 448-8572 Rosario S2000CVV, Santa Fe, ARGENTINA www.psiware.com.ar

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Mac carbon VM 3.8.15b1 pending
by John M McIntosh 29 Jan '07

29 Jan '07

I put a new macintosh carbon VM on my idisk and FTP site http://www.smalltalkconsulting.com/squeak.html Squeak 3.8.15beta1U.app.zip This VM incorporates some changes to fix issues with sound recording/ playback crashes that the Scratch Support team found. It fixes a problem with untrustedUserDirectory that Tetsuya HAYASHI found. It fixes an issue with the alternate grow VM memory logic that the Sophie Team found. VM changes are: 3.8.15b1 interp.c Alter VMMaker logic to put in missing period in biasToGrow | growSize | growSize := growHeadroom*3/2 - (self sizeOfFree: freeBlock). self growObjectMemory: growSize sqMacSecurity.c untrustedUserDirectory remove fixPath that Tetsuya HAYASHI reported stripping last directory off of untrusted directory path that is in info.plis sqUnixSoundMacOSXJMM.c dprintf, change to #define otherwise use of dummy method causes compiler to push parms, resulting in crash if buffer was not allocated on startPlay 3.8.14b8 Basis for MIT Scratch VM sqUnixSoundMacOSXJMM.c Changes to recording buffer logic to watch for buffer being freed by main thread, since recording buffer logic runs on separate os-x process. Issue was crash on stop recording Where we seem to stop the recording and dispose of the buffer, but then the buffer recording logic on the other thread (osx 10.3) wants to memcopy just one more buffer... 3.8.14b7 sqMacMain.c Add signal handler on SIGSEGV, dump all stacks. -- ======================================================================== === John M. McIntosh <johnmci(a)smalltalkconsulting.com> Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com ======================================================================== ===

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Concurrency classes...
by Göran Krampe 29 Jan '07

29 Jan '07

Hi folks! I was googling for good concurrency classes for Java (cough) yesterday and discovered Doug Lea's util.concurrent (http://gee.cs.oswego.edu/dl/concurrency-interest/index.html) and the new java.util.concurrent in Java 1.5 resulting from Doug's work (http://java.sun.com/j2se/1.5.0/docs/guide/concurrency/overview.html). Now, this leads me to the question - how do we stack up in Squeak land? AFAIK we have this: 1. Semaphore - the basic building block. 2. Monitor - the new "better Semaphore", but on a higher level. 3. SharedQueue - a simple queue, has been improved relatively lately. 4. SharedBufferStream - a different implementation of SharedQueue that is more efficient and... well, a bit different. :) (my memory fails) 5. SharedBidirectionalStream - a combo of two SharedBufferStreams thus mimicking a SocketStream "in image" since it has two independent channels in both directions (like a SocketStream has). Quite fun to play with and useful for multiplexing (multiple Processes sharing a SocketStream) etc. (The two last classes are available in SharedStreams available on SM (http://map.squeak.org/packagebyname/sharedstreams)) Surely we have lots more spread out in various places? I know that most of the time we get by fine with Monitor and SharedQueue, but some things that I feel are missing *and* would be useful is: - something for executing "tasks" - more concurrent Collections regards, Göran

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Squeak on the ... Xbox 360?
by Aaron Reichow 29 Jan '07

29 Jan '07

Hey everyone! Another thing I'm wondering- has anyone tried getting Squeak going on the Xbox 360? Like the PS3, it's an incredibly powerful machine- three async multi-processing cores at 2.5 GHz, if I'm remembering correctly. For anyone interested, you can download the XNA Game Studio Express 1.0 for free from MS's site at the URL below. Hobbyists can use to develop programs for the 360 without having to use a modchip or other DMCA-violating measures. http://msdn2.microsoft.com/en-us/xna/aa937795.aspx I'm thinking about getting a 360, and probably will- I'm just waiting around hoping for a drop in price. If no one else has tried it or plans on it, I will probably take a whack at it. Now that I have an Intel Mac Book Pro, I can run these Windows-only programs! Regards, Aaron

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Monticello and pool dictionaries
by Norbert Hartl 28 Jan '07

28 Jan '07

Hi, I try to make a monticello package from a squeakmap package. The package is RemoteFrameBuffer. I created the package and adusted the categories of all extension methods. The monticello package includes everything what the changeset from squeakmap does. In the class RFBServer there is pool dictionary defined. If I install the package from squeakmap there appears a dialog asking if I like to add the pool dictionary. Installing the package from monticello opens also a dialog but an dialog for an unresolved dependency. It cannot load the RFBServer class as long as the pool dictionary isn't there. Looking in the cache from squeakmap I found the changeset for the RemoteFrameBuffer. Are squeakmap packages only changesets? I thought I may find a kind of preamble in the package which initializes the pool dictionary. What is the best way to handle this situation with monticello? I don't know how monticello handles dependencies. As far as I understand pool dictionaries they can be created by invoking Smalltalk at: #dictName put: Dictionary new Is this right? Do I need to create pool dictionary manually in an initialize methods? thanks in advance, Norbert

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Good news for PDA Squeak- Nokia's giving me a new N800!
by Aaron Reichow 28 Jan '07

28 Jan '07

Hello again! This isn't incredibly useful, but it's still happy news. Nokia recently released a follow up to the Nokia 770 Internet Tablet (a lowish powered PDA with a beautiful hi-res screen running Linux)- the Nokia N800. The N800 is mostly the same thing, but it does have a faster CPU- 330 MHz vs the 220 MHz of the Nokia 770. As a part of the release, Nokia is giving 500 770 developers and evangelists a $300 for purchasing a Nokia N800 at the low price of $99. I was chosen as one of those developers to receive one of these almost-free Nokia N800s because of my presence in the #maemo IRC channel (on irc.freenode.net) and work with PDA Squeak. I didn't know it at the time, but evidentially people have noticed our work (thanks Gerald and Onne!), and my work in using Squeak on the 770. I've talked a lot about Squeak in the #maemo channel and shared my personal goals and use of Squeak and why I think it is a good fit for the Nokia Internet Tablet platform. So, in some way, Nokia thinks that Squeak and Dynapad/Squeak PDA stuff is important! Boooya! As an aside, I'm debating what I should do with my Nokia 770 when I get my new N800. If there is anyone here on the list that would find a Linux-based handheld device with a 220 MHz CPU and 800x480 screen useful for their work, please shoot me an email with a short description of what you want to do with the Nokia 770 and how much you'd be willing to pay for it. The 770 goes for $360+ new, but if there is someone out there for whom a 770 would bring them into the world of Squeak PDA hacking, maybe someone with whom I could collaborate, I'd be willing to part with it for something much less. Regards, Aaron

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Segfault at startup due to FFI
by Matthew Fulmer 28 Jan '07

28 Jan '07

I have an image that is segfaulting at startup due to a process that is using Smallapack, which uses FFI. The process is not critical, so I would like to start the vm, then terminate the offending process before it gets to run. My image would probably work fine then. I think the process is crashing because it is invoking Morphic, getting nil or something weird since Morphic is not yet initialized, then sending crap at FFI, and segfaulting. How can I do that, or can I do it at all? -- Matthew Fulmer -- http://mtfulmer.wordpress.com/ Help improve Squeak Documentation: http://wiki.squeak.org/squeak/808

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Re: [Seaside] Fwd: OSCON 2007 Call for Participation Ends Soon
by Giovanni Corriga 27 Jan '07

27 Jan '07

Il giorno ven, 26/01/2007 alle 10.45 +0100, stephane ducasse ha scritto: > On 26 janv. 07, at 10:40, Avi Bryant wrote: > > > On 1/26/07, stephane ducasse <stephane.ducasse(a)free.fr> wrote: > >> Hi avi > >> > >> do you think that as a community effort we could someone presenting > >> pier/magritte? > >> May be esug could participate? > > > > If you mean, should ESUG sponsor Lukas to go and give a talk on Pier, > > then yes, of course they should :). > > The problem is that we do not have enough money for that. We could > participate. > Or a nice seasider living more closely to portland could do it :) PR-wise, "sending" a Squeaker/Seasider to give a talk to OSCON would be money well spent. I'd participate in a fundraiser for that, is ESUG or the Squeak Foundation organized one. Giovanni

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