Squeak-dev March 2009

squeak-dev@lists.squeakfoundation.org

134 participants
173 discussions

Ho to remove some font sets from Squeak?
by Luis Valente 31 Mar '09

31 Mar '09

Hi, I'm testiing some free fonts in Squeak. In Windows, I droped the ttf files and installed the fonts this way, but I don't like a few of them and want to get it out again. Is there a way to uninstall the fonts I decide? Thanks in advance. -- All the best, Luís Valente

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Problem with supperclasses in Sunit
by Mariano Martinez Peck 31 Mar '09

31 Mar '09

Hi everybody: I am having a problem with Sunit on Squeak. I have a class called A and has a testXXX method (method that should be executed by sunit). I have class B that inherits from A and has no test method (method that should be run by sunit). When I want to run the tests of B (from Test Runner) I notice that testXXX is not run. I mean, zero runs for class B. I think this is incorrect. Am I ok ? Should testXXX be executed in this case ? Thanks for the help. Mariano

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OSProcess capabilities on Windows
by Aran Lunzer 30 Mar '09

30 Mar '09

Hi Today I've been playing with OSProcess and CommandShell, to see if they can give me the control I'd like for running external processes on Windows (XP, then later Vista). The VM I'm using is a somewhat customised Web-browser plugin based on 3.7. The image is a pretty heavily customised 3.7. The plugin I built today seems to be working, and with a bit of tweaking I've successfully launched batch-file commands from the Squeak shell or by talking directly to CommandShell. However, I'm having trouble figuring out which aspects of the overall (and impressive) Unix-oriented behaviour are supposedly available for Windows platforms. On the OSProcess web page it just says "The Windows support is not as complete as that for Unix, but it is sufficient for running external Win32 programs from Squeak." Ideally what I'd like to do is launch an executable (a Java application, typically invoked through a batch file) that listens for user-typed commands on stdin, and produces console-style responses. I'd like to throw commands at it from Squeak, listen for the corresponding results, then eventually shut it down. However, as things are: - CommandShell will happily start a command, but only if it includes redirections for both stdout and stderr. Otherwise I get walkbacks from two BufferedAsyncFileReadStream instances, which find themselves unable to run primTestEndOfFileFlag: - Even if I do provide stdout and stderr redirections, they don't actually receive any output from the running process. So - is it that ExternalPipes are (for now) completely unsupported for Windows? Or have I just managed to mess things up somewhere? If they're not available, I'm hoping I can hack something up using a Unix-style "tail" command to deliver the input, or some such scheme. That was the plan before I found these packages. Thanks - Aran -- Aran Lunzer Hokkaido University, Japan

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Coding in Slang; array access??
by Michael van der Gulik 30 Mar '09

30 Mar '09

Hi. I'm working on http://bugs.squeak.org/view.php?id=7320. Generally, it's been educational. However, I'm a bit stuck. When you're working in Slang, are there special things I need to be aware of when using arrays? I suspect that the array is 0-based in C, or 1-based and converted oddly, or something. The whole method is below, but it won't accept the index into the external objects array that I'm passing it; according to gdb, the primitive fails at the test to check that the object is of class Semaphore. Is there a modern image with a working version of the InterpreterSimulator around? Also, I've found that Slang sometimes compiles my code oddly... does it sometimes not give error messages when things are awry? Thanks, Gulik. primitiveInputSemaphore "Register the input semaphore. The argument must be an array index into the external objects array, and it must point to a Semaphore instance. " | arg dereferencedArg semaphoreClass xArray xSize xIndex | arg := self stackTop. " Check that the given argument is an Integer. " (self isIntegerObject: arg) ifFalse: [ self primitiveFail. ^nil ]. xArray := self splObj: ExternalObjectsArray. xSize := self stSizeOf: xArray. xIndex := self integerValueOf: arg. " Check that the argument is a valid array index. " (xIndex > xSize) ifTrue: [ self primitiveFail. ^ nil. ]. (xIndex < 0) ifTrue: [ self primitiveFail. ^ nil ]. " Check that the given argument points to a Semaphore. " dereferencedArg := self fetchPointer: xIndex ofObject: xArray. semaphoreClass := self splObj: ClassSemaphore. ((self fetchClassOf: dereferencedArg) = semaphoreClass) ifFalse: [ self primitiveFail. ^ nil ]. self ioSetInputSemaphore: (self integerValueOf: arg). successFlag ifTrue: [self pop: 1]. -- http://gulik.pbwiki.com/

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problem with threads
by Jordi Delgado 30 Mar '09

30 Mar '09

Hi, I've been spending some time improving my poor understanding of processes in Squeak. After studying through the usual suspects (essentially the bluebook and X.Briffault french book, I've not used yet any VW focused book, to avoid confusion) and some google-ing, I am trying to find clear examples with almost-trivial behavior in order to illustrate the main points of squeak concurrency (I want to teach it, fortunately that will not happen anytime soon). Well, I need to re-define "almost trivial". Let's see. I thought that the following code (executed from a Workspace): | s p1 p2 | s := SharedQueue new: 20. p1 := [(1 to: 10) do: [:i | s nextPut: i. Processor yield.]] newProcess. p2 := [(11 to: 20) do: [:i | s nextPut: i. Processor yield.]] newProcess. p1 priority: Processor activePriority - 1. p2 priority: Processor activePriority - 1. p1 resume. p2 resume. s inspect. was almost-trivial. It behaves as one would expect: s contains #(1 11 2 12 3 13 4 14 5 15 6 16 7 17 8 18 9 19 10 20) But, if you agree with me in the "almost-triviality" of the example, probably you should be able to explain why the following code: | s p1 p2 | s := SharedQueue new: 20. p1 := [1 to: 10 do: [:i | s nextPut: i. Processor yield.]] newProcess. p2 := [11 to: 20 do: [:i | s nextPut: i. Processor yield.]] newProcess. p1 priority: Processor activePriority - 1. p2 priority: Processor activePriority - 1. p1 resume. p2 resume. s inspect. ends up with s containing: #(1 11 13 14 15 16 17 18 19 20 nil nil nil nil nil nil nil nil nil nil) (notice that the only difference is that I am sending a to:do: message to a SmallInteger, instead of a do: message to an Interval). So, as of now, I am unable to figure out what is going on. Any clue? please? I'd rather prefer a sophisticated answer, otherwise I'm going to feel like an idiot :-)) Thanks a lot in advance, Bests, Jordi PS: This behavior is identical in Squeak 3.9, 3.10 and Pharo, and in a Linux VM and a Mac VM.

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How to remove font set from Squeak?
by Luis Valente 30 Mar '09

30 Mar '09

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RE: running squeak from flash stick
by Ralph Boland 30 Mar '09

30 Mar '09

> > I want to be able to store and run my Squeak project on a flash stick ... > Most of the mainline Squeak's don't require install. > Grab one and put the files on the stick. I only know squeak.org which requires that I use install which of course fails if I try to install on my flash stick. Can you point me to a version of Squeak that does not require an install and runs the version of Squeak 3.10 (linux) from squeak.org? > I always work using a one-click distro, which on a USB key allows you > plug the key into a Linux, Windows, or Mac machine and continue > working against the same image. This would be cool. I don't need to run on non Linux OSs right now but I might in the future. > ... > There are three text files that point at the image name (one for each > platform): > squeak.ini (Windows) > squeak.sh (Unix) > Contents/info.plist (Mac) I don't see any of these files anywhere. This helps in one way though. I remember reading Squeak doc referring to squeak.ini but I could never find the file. Turns out It was never in in the Linux distro! >From - Bert - > You should simply copy a working installation to the stick. That does > not require symlinks. It is not clear to me what files I need to copy or where I should put them. Since file "squeak" is a binary I cannot tell what it is doing or how to modify it. > We are actually working on something similar for classroom use. Take a > look at this: > http://wiki.squeakland.org/display/sq/Etoys+on+a+Stick > If you run this on a Linux machine it should create a zip file that > you can unzip to a USB flash drive, and use on (x86) Linux, Mac, and Windows. Using your file I got Etoys to work fine on my flash stick (I only tried Linux). Looks cool! But I do not see how to get squeak to run the same way. By the way, I also looked at the INSTALL file and config file that came with the Linux version of the Squeak virtual machine. But, not being and expert in config files or INSTALL files, I couldn't figure out what I need to know. I could solve the symbolic links problem by making copies but I don't believe that will solve all my problems. Ralph Boland

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WTF ???
by Mariano Martinez Peck 30 Mar '09

30 Mar '09

I have a very strange problem. Here at work, I am using Windows with NOD32 and every time I try to download something with Monticello I see my CPU 99% used by the process "ekrn" which is a process of NOD32. My download from MC is so slow that I have to wait hours to be download (the progress bar moves very very slow). If I kill the ekrn process, the progress bar goes fast and I can download something from MC (the normal case). Any ideas ? someone has the same problem as I ? Cheers, Mariano

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problems porting project from Squeak3.8.1 to Squeal 3.10.2
by Ralph Boland 30 Mar '09

30 Mar '09

I am trying to port my project from Squeak 3.8.1 to Squeak3.10.2 I have run into a number of problems. First, I am not using Monticello. I just file out my packages and then file them into the new image. Part of the reason I do this is because I need to add new variables to some classes (Character (class vars), SmaCCParser, and SmaCCScanner) and part of the reason is because I need to provide instructions of the form file in this package, add these instance variables, file in this package or maybe that package etc. For now I can just package everything including load instructions into a tar file. Anyway, the first few packages file in fine. Then package 4NeufsBase.st appears to file in fine but when as I open a class browser the browser has two rectanges overlayed on top of it. They are each about 3cm x 7cm and blue. They move with the browser when you move it making the browser (and the image) unusable. I tried filing in 4NeufsBase.st one class category at a time. This works (the blue rectangles go away) but there are a few errors because the class category files contain methods from packages that I have not filed in yet. I could file these in separately but I got clever instead and used Monticello. Except Monticello didn't work either. First I open the package-cache directory from Monticello. Then I click on 4NeufsBase. Then I select 4NeufsBase.rpb.1.mcz. Then I get an error in method UTF8TextConverter>>nextFromStream: errorMalformedInput. on line: "unicode isNil ifTrue: [^self errorMalformedInput]." In the method character1 has value 152. character2 has value 169. character3 has value $}. character4 has value nil. I suppose I could create a bug report but I need 30,000 lines of code to reproduce the bug. And this code is not ready for release so I don't really want to release it yet. Anyway, I could continue by filing in the missing code from 4NeufsBase (code in cagetories marked with a * and using classes not yet filed in) after I file in the remaining packages but running into these bugs has made me weary of upgrading to 3.10.2. Perhaps I should only upgrade to 3.9 or not upgrade at all. Comments welcome and if there is anything I can do to help track down these bugs let me know. Also, when I finally release my project, I intend to use Monticello so I need to know: where is the standard place to put instructions on how to file in multiple packages to load a project using Monticello? Ralph Boland

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Problems installing FreeType Support
by Andrey Larionov 30 Mar '09

30 Mar '09

Hello, I'm trying to install FreeType from Universe, but no success. If i select FreeType Plus 0.5 and press install button it installs FFI 3.9.1, and then hangs on installation of FreeType plugin installer 0.16. Then i close image (force without save) and open again. And select to install FreeType plugin installer 0.16 (without any other packages). In this way package installs. Then is select to install FreeType plugin 0.5 and click on button. It installs FFI and when starts FreeType 0.5 installation it hangs. Then i close image (force without save), cleans all downloaded resources (.sar, .dll, .mcz in all folders) and open again. Separatly install plugin installer and FFI and on FreeType 0.5 it hangs again. Then i close image and clean resources. After it i download .mcz for FreeType plugin from SqueakMap and put in package-cache in hope, what it simply cannot download. But no success. After again cleaning and restarting i install plugin installer and FFI, and then load FreeType plugin from mcz using Monticelo Browser. And now it's works. Any suggestions? My enviroment: WinXP SP3 with lastest updates on VirtualBox under Ubuntu 8.10. Affected vms: SqueakVM-Win32-3.10.6-bin, Squeak3.10.2-7179. Affected images: sq3.10.2-7179dev09.03.1.zip, sq3.9.1-7075dev09.03.1.zip, Squeak3.10.2-7179-basic.zip. As i rememeber in Squeak there is some magic keystroke, which breaks currently running tasks and brings debugger. Can you referesh my mind? Thanks/

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