Squeak-dev January 2001

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Re: [BUG] floatAt:put: problems on Linux?
by John Chludzinski 03 Jan '01

03 Jan '01

I've found the instructions in /usr/local/doc/squeak2.8/BUILD.UnixSqueak Thanks, John

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Re: [BUG] floatAt:put: problems on Linux?
by John Chludzinski 03 Jan '01

03 Jan '01

Kevin Fisher wrote: >Hmm, I had some trouble getting FFI working on Linux originally as well. I solved it by rebuilding the VM with --enable-ffi=yes..after that, >it worked like a charm. >You need to use --enable-ffi=yes or else FFI does NOT get enabled under Linux. OK, I'll give it a try - now, how does one rebuild the VM? On Linux? ---John

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Re: [BUG] floatAt:put: problems on Linux?
by Bob Arning 03 Jan '01

03 Jan '01

On Wed, 03 Jan 2001 11:23:05 -0500 John Chludzinski <jchludzinski(a)worldkey.net> wrote: >In my workspace I enter the following code: > >| 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, I reviewed the messages you got in response the last time you posted this question and it sounds like there is a problem with the FFI stuff on Linux. I would look for an alternative way of doing what you need to do that avoids FFI. Cheers, Bob

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[BUG] floatAt:put: problems on Linux?
by John Chludzinski 03 Jan '01

03 Jan '01

In my workspace I enter the following code: | 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

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Smalltalk ans Squeak presence at SIGCSE'2001
by Stephane Ducasse 03 Jan '01

03 Jan '01

Hi I'm just reading the contents of SIGCSE'2001 (Computer Science Education) and I noticed that there is a big presence of papers, tutorial on teaching Java. I was thinking that this could be good from this communitee to have a presence there and propose for example a tutorial: Squeak for the Teachers. I could participate. I saw that Mark is participating. Mark do you know the fee paid for tutorial? I was thinking to propose a tutorial named : Smalltalk for the Java Programmer at OOPSLA because last time everytime I made a demo to non smalltalker of Squeak they really get fascinated. Any reactions? Stef 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.

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VM questions
by Marcel Weiher 03 Jan '01

03 Jan '01

Another couple of questions that cropped up while doing the VM and translation work: 1. Polling for events Squeak seems to poll quite vigorously for events, undeterred by the fact that nothing is happening. I also see it sucking significantly more CPU in Morphic than in MVC when idle, which doesn't really seem to be the desired behavior for an event-based system. The CPU usage for idle Morphic is also somewhat bursty. Should I simply put it too sleep in the event-getter code if there are no events, or is this a bad idea? I should mention that the VM is multi-threaded. 2. Surfaces It looks like surfaces are a more general replacement for the Display interface allowing multiple native windows. I've read the comments but am not entirely clear what the status is. Could I actually replace the current display output routines with surface-oriented stuff and get a working image? Is there sample code? 3. Misc VM The code that saves the image directly accesses an char* imageName; variable instead of using the provided getter routine for the imageName. Is this intentional or something that should be removed? Calls from the interpreter to the VM support code sometimes use plain msg-sends that are translated to function calls (in the C VM), and sometimes use inline C code. Wouldn't it be better to remove the literal C-code and let the translator take care of it? 4. Stopping the interpreter The interpret() loop as it is generated by default is not-stoppable outside a setjmp()/longjmp(), meaning that the only way to terminate it is to terminate the process, which makes the code after the loop somewhat redundant (though harmless). I've added a flag that is checked at the end of a message send and breaks out of the loop with a goto for the VM I posted. Along with the recycling of the buffer allocated with sqAllocateMemory this allows new images to be loaded into an existing process (one at a time!) with only minor leakage. Is this actually good enough? Could it be added as a standard feature (I see something like it is there for Mac browseer plugins)? After I have stopped the VM, is it possible to initiate a save-imge sequence externally? I am pretty sure I have some more questions, but this is probably enough for now. Marcel

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More on Squeak installation
by Peter Schuller 03 Jan '01

03 Jan '01

Hello, I am now attempting to re-install Squeak from scratch again. And I want the latest version. I do have a working 2.9, but it's ugly (2.7 VM and 2.9 image/changes forced upon the VM on start-up). So I got the 2.8 VM. I still cannot find a 2.9 VM, even in source form. The 2.9 directory (ftp://st.cs.uiuc.edu/Smalltalk/Squeak/2.9_alpha/) only contains the changes/image files. I got the latest version (ftp://st.cs.uiuc.edu/Smalltalk/Squeak/2.9_alpha/Squeak2.9a-3125.tar.gz). I got the 2.8 image and changes, because the 2.8 VM is set to look for these (I don't want to do any ugly work-arounds here, like telling squeak manually to use the 2.9 stuff). I installed the 2.8 binary and changes/image using the INSTALL script (that is, in the standard locations). I now have a nice official 2.8 release working. Is there now a way to file in the post-2.8 changes to my image? The 2.9 changes file contains ALL changes since V2. So they would duplicate the 2.8 changes. Is there an archive of all .cs additions perhaps? If so, I should be able to identify what's post-2.8. I'm still not quite sure about the 2.9 image. The fresh 2.8 install's welcome message says "Squeak 2.8". Yet, using the same squeak binary and giving it the 2.9 image/changes, it says "Squeak 2.7". So it appears that 2.9 is not a child (when looking at the changes structure as a tree) of 2.8, but was rather forked *before* the advent of 2.8[1]. If so, it would imply there is no safe way of applying post-2.8 changes to a 2.8 image, because the only version of 2.9 available is a child of a pre-2.8 changes set. I am convinced this is not the case however; I just don't know what *is* the case... I'm thoroughly confused... Thanks, [1] Unless someone changed the welcome phrase *back* to "welcome to squeak 2.7" in making 2.9 changes to the 2.8 base. I find this unlikely... -- / Peter Schuller, InfiDyne Technologies HB PGP userID: 0x5584BD98 or 'Peter Schuller <peter.schuller(a)infidyne.com>' Key retrival: Send an E-Mail to getpgpkey(a)scode.infidyne.com E-Mail: peter.schuller(a)infidyne.com Web: http://scode.infidyne.com

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[GOODIE] Objective-C translator
by Marcel Weiher 03 Jan '01

03 Jan '01

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RE: Looking for a copy of my own documentation
by Robert W. Vens 03 Jan '01

03 Jan '01

Is this someting you can use?: http://www.ra.informatik.uni-stuttgart.de/~gosho/pdftohtml/ -----Oorspronkelijk bericht----- Van: Stephen T. Pope [mailto:stp@create.ucsb.edu] Verzonden: dinsdag 2 januari 2001 16:10 Aan: Jarvis, Robert P. (Contingent) CC: 'bboyer99(a)mediaone.net'; squeak(a)cs.uiuc.edu; vwnc(a)cs.uiuc.edu Onderwerp: Re: Looking for a copy of my own documentation Thanks to all for the several pointers to the PDF version of the Krasner & Pope "MVC Cookbook." Now I'd like to be allowed a follow-on question: Does anyone know of a PDF-to-HTML translator? -- stp Stephen Travis Pope http://www.create.ucsb.edu/~stp

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[ENH] Change List - Filter older versions
by Gerardo Richarte 03 Jan '01

03 Jan '01

When maintaining a package across squeak updates you usually change methods that then get changed on a new update. The task to keep your changes up to date is hard... this may help a little: on a change list, as opened from a file list/browse changes, you can remove all methods with a timestamp newer than the current stamp for that same method. As a result, you get a changelist with only those methods on the .cs file you opened, that whould overwrite newer versions if filed in. Changed Bye! Richie++ Change Set: filterOlderVersions Date: 26 December 2000 Author: MathMorphs Added an option to change lists to filter all methods from a changeset that are older than the current (system) version. Useful when you are maintaining a package across squeak updates 'From Squeak2.9alpha of 13 June 2000 [latest update: #3144] on 26 December 2000 at 10:58:53 pm'! "Change Set: filterOlderVersions Date: 26 December 2000 Author: MathMorphs Added an option to change lists to filter all methods from a changeset that are older than the current (system) version. Usefull when you are mantaining a package across squeak updates"! !ChangeList methodsFor: 'menu actions' stamp: 'r++ 12/26/2000 22:20'! changeListMenu: aMenu "Fill aMenu up so that it comprises the primary changelist-browser menu" ^ aMenu labels: 'fileIn selections fileOut selections... compare to current toggle diffing select conflicts with any changeset select conflicts with current changeset select conflicts with... select unchanged methods select methods for this class select all deselect all browse current versions of selections remove doIts remove older versions leave only older versions remove selected items remove unselected items' lines: #(2 4 6 9 11 12) selections: #(fileInSelections fileOutSelections compareToCurrentVersion toggleDiffing selectAllConflicts selectConflicts selectConflictsWith selectUnchangedMethods selectMethodsForThisClass selectAll deselectAll browseCurrentVersionsOfSelections removeDoIts removeOlderMethodVersions leaveOlderThanSystem removeSelections removeNonSelections) "select such that... selectSuchThat" ! ! !ChangeList methodsFor: 'menu actions' stamp: 'r++ 12/26/2000 22:53'! leaveOlderThanSystem "leave only those methods that are older than the current version" | class newChangeList newList sysStamp | newChangeList _ OrderedCollection new. newList _ OrderedCollection new. changeList with: list do: [:change :stamp | (class _ change methodClass) ifNotNil: [ sysStamp _ Utilities timeStampForMethod: (class compiledMethodAt: change methodSelector ifAbsent: [CompiledMethod new]). sysStamp size > 0 ifTrue: [ (Date fromMethodTimeStamp: (stamp copyAfter: $;)) <= (Date fromMethodTimeStamp: sysStamp) ifTrue: [ newChangeList add: change. newList add: stamp]]. ] ]. newChangeList size < changeList size ifTrue: [changeList _ newChangeList. list _ newList. listIndex _ 0. listSelections _ Array new: list size withAll: false]. self changed: #list! ! !Date class methodsFor: 'instance creation' stamp: 'r++ 12/26/2000 22:46'! fromMethodTimeStamp: aString ^ self readFrom: aString substrings second readStream ! ! ChangeList removeSelector: #leaveOnlyOlderThanSystem!

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