Squeak-dev March 2009

squeak-dev@lists.squeakfoundation.org

134 participants
173 discussions

WorldState deferredUIMessages queue
by Chris Muller 27 Mar '09

27 Mar '09

(3.9 Morphic). With Maui I occassionally get World lockups due to the UI process waiting for the #next of the deferredUIMessages, which is empty. Specifically, the freeze, when it occurs, is always in WorldState>>#runStepMethodsIn:. There's a while loop to process messages in the queue: "Dispatch deferred messages while maintaing rudimentary UI responsiveness." [i < numItems and: [(Time millisecondsSince: stamp) < limit]] whileTrue: [queue next value. i := i + 1]. and its hung waiting for "queue next". But it seems like this shouldn't be possible because, at the top of the method, "numItems" is set to the size of the queue. numItems := queue size. and so the only explanation is, somehow in processing one of the messages, it causes another one to be removed from the queue. This appears to be possible if the first message calls a #doOneCycle, leading it back through this same method.. I do have 4 or 5 #doOneCycles sprinkled around, in order to force correct layout or screen redraws. I'm pretty sure these are causing the deadlock but.. when I tried taking some of them out I get the layout/redraw problem.. Any advice is greatly appreciated. - Chris

5 7

[bug] xor: is this an old bug or what?
by Keith Hodges 26 Mar '09

26 Mar '09

true xor: [ true ] => true discuss Keith

12 17

Linux Squeak (was Re: [Newbies] Setting up a squeak on a Ubuntu system)
by Bert Freudenberg 26 Mar '09

26 Mar '09

(moving discussion to squeak-dev) On 26.03.2009, at 08:14, K. K. Subramaniam wrote: > On Thursday 26 Mar 2009 3:14:20 am Bert Freudenberg wrote: >> Well, the Etoys install should have created a menu entry so you just >> click that and it should work. > This only launches Squeak. Etoys, to be precise. > Mac users are used to opening *.image files by drag-n-drop on the > Squeak app. Correction: Mac *developers* do that. And that also works on Windows if I am not mistaken. Besides, I think double-clicking the image is used even more often, or choosing "Open with ..." if you have multiple VMs installed. > If there are only a few images, the following > steps will create a desktop button to launch an image directly: > > 1. Right click on Desktop, click on "Create Launcher..." > 2. Enter Name: "My Development Image" > Command: "squeak path-to-my.image" > 3. Click on Icon and pick a good graphic for your desktop button. > 4. Click OK. > > A button will now appear on your desktop. Clicking it will open the > image in > squeak directly. Again, I'm pretty sure someone already made a desktop entry that allows to double-click an image. Did you try the Ubuntu squeak package? I have also seen a setup where the "Squeak" menu entry opened a file dialog that let you choose an image. Anyway, the first thing is to tell the system about Squeak-related files. On Linux that generally works by MIME types. For that, you need to put an xml file like this into /usr/share/mime/packages/ : <?xml version="1.0" encoding="UTF-8"?> <mime-info xmlns="http://www.freedesktop.org/standards/shared-mime- info"> <mime-type type="application/x-squeak-project"> <comment>Squeak Project</comment> <glob pattern="*.pr"/> </mime-type> <mime-type type="application/x-squeak-image"> <comment>Squeak Image</comment> <glob pattern="*.image"/> </mime-type> <mime-type type="application/x-squeak-object"> <comment>Squeak Object</comment> <glob pattern="*.sqo"/> </mime-type> <mime-type type="application/x-squeak-archive"> <sub-class-of type="application/zip"/> <comment>Squeak Archive</comment> <glob pattern="*.sar"/> </mime-type> </mime-info> And then you can associate a MIME type with an application or script to open it. I don't remember the details though. IMHO the Squeakers on Linux should contact the packagers of their favorite distribution and let them know what they would expect the package to do. As long as every developer only installs their own VMs and images, it is much harder than necessary for newcomers to get their system going. The days when every Linux user was an expert who knew how to compile their software and maintain the system are long gone, they now expect things to work out-of-the-box. Which is a good thing, IMHO. There already are Squeak packages in (at least) Debian, Ubuntu, Fedora, Mandriva, and I non-official packages for at least Gentoo and ArchLinux. We should help those packagers because they considerably increase the visibility of Squeak in the wider free software community and its usefulness to users. Ideas how to do that are highly welcome. - Bert -

2 1

Re: [squeak-dev] How to tell if you have a boolean when you care to know
by Jerome Peace 25 Mar '09

25 Mar '09

Opps forgot to send to the list. --- On Wed, 3/25/09, Jerome Peace <peace_the_dreamer(a)yahoo.com> wrote: > From: Jerome Peace <peace_the_dreamer(a)yahoo.com> > Subject: Re: [squeak-dev] How to tell if you have a boolean when you care to know > To: "Michael van der Gulik" <mikevdg(a)gmail.com> > Date: Wednesday, March 25, 2009, 5:42 PM > --- On Wed, 3/25/09, Michael van der Gulik > <mikevdg(a)gmail.com> wrote: > > > From: Michael van der Gulik <mikevdg(a)gmail.com> > > Subject: Re: [squeak-dev] How to tell if you have a > boolean when you care to know > > To: peace_the_dreamer(a)yahoo.com, "The > general-purpose Squeak developers list" > <squeak-dev(a)lists.squeakfoundation.org> > > Date: Wednesday, March 25, 2009, 5:01 PM > > On 3/25/09, Jerome Peace > <peace_the_dreamer(a)yahoo.com> > > wrote: > > > > > > > > > In another tread Keith Hodges wrote: > > > > > > 2009/3/24 Keith Hodges <keith_hodges at > > yahoo.co.uk> > > > > > >> true xor: [ true ] => true > > >> > > >> discuss > > >> > > >> Keith > > > > > > a simple guard for a boolean can be written > simply. > > > > > > true xor: bar aBoolean > > > > Don't you mean >>asBoolean? > > Absolutely NOT. Reread the original post. > > asBoolean returns true or false for all objects. > The expectations is that objects other than Booleans will > return true or false. > > The purpose of aBoolean is to throw an error when foo is > not a boolean. > > The elaborate form of the message would be > > surelyYourABoolean > > "To which non Booleans would reply" > > ^self error: 'No I'm not a boolean and stop calling > me Shirley.' > > Which I got from remembering Leslie Nielson in the movie > Airplane. :) > > Thanks for giving me a chance to clear that up. > > Yours in curiosity and service, --Jerome Peace

1 0

How to tell if you have a boolean when you care to know
by Jerome Peace 25 Mar '09

25 Mar '09

In another tread Keith Hodges wrote: 2009/3/24 Keith Hodges <keith_hodges at yahoo.co.uk> > true xor: [ true ] => true > > discuss > > Keith a simple guard for a boolean can be written simply. true xor: bar aBoolean will throw an error when bar is not a boolean if Boolean>>aBoolean ^self and all other classes agree not to implement aBoolean, This pattern can be extended to do all sorts of dynamic type checking. Keith: Great bug find says Puck. Elliot: +1 for your proposed fix for #xor: Yours in curiosity and service, --Jerome Peace and his imaginative friend Puck, fearless bug finder and Trouble Maker.

2 1

Re: ProcessWrapperPlugin.dll [was: OSProcess capabilities on Windows]
by Aran Lunzer 25 Mar '09

25 Mar '09

Andreas Raab wrote: >>> b) Use your current build environment and #define VM_PROXY_MINOR to be >>> the minimum version you can get away with (i.e., the minimum version >>> the plugin compiles with). >> >> Wow! Approach (b) did the trick! I only needed to increment by 1. >> >> Sneaky but effective :-) > > Not sneaky at all. The interface is designed in such a way that you can > compile for older proxy versions if you'd like to. Hmmm... I see what you're saying. But I only recompiled the VM, pretending that it has a minor-version of 6 when in fact it only includes the changes up to 5. That's surely sneaky, in general... though in this case I have the source code of the newest VM and of the plugin, and a quick look suggests no major code-breaking changes between 5 and 6. And the test cases all run, so something must be happy. Thanks again Aran

2 1

'LPF' works now
by Raymond Asselin 25 Mar '09

25 Mar '09

Hi Keith thanks for your reply. Everything is OK now, I found the problem. Here is a sequence of what I did if this can help... OK, I tried this: 1. Installer install: 'LPF'. "in a sq3.9.1-7075webo9.03.1.image" Which installed few fixes from Mantis etc... 2. but image freeze (image not responding) when: Booting <http://www.squeaksource.com/mc/Monticello.impl-kph.637.mcz>. 3. I forced a user interrupt and see that the problem was around OBTree... so.. 4. Quit without saving 5. Reload the image 6. Zap the 'OB Package Browser window' and others 7. Installer install: 'LPF' again... == Now Monticello.impl-kph.637.mcz seems to load correctly, except: 8. Error: a primitive has failed ! It seems related to UnixFileDirectory (FileDirectory)>> primCreateDirectory: 9. Fired the debugger: I saw that Monticello try to create 'package-cache' in my localPath. There is a 'package-cache' in the directory BUT this one is an 'alias' so maybe that is the problem...so 10. Zapped the alias of 'package-cache' in my localPath 11. Return to (5. - 6. - 7.) everything is OK ====== CONCLUSION: a) the install script must ensure that there is no OmniBrowser windows open in the image where the script will run. b) the install script must ensure that there is no 'alias' of 'package-cache' in the localPath (directory of the Squeak image) I don't know if this is possible, I just want you to know that, as a contribution to your excellent work. Raymond

1 0

unsubscribe
by Yassine.Khlifi＠bull.net 25 Mar '09

25 Mar '09

Yassine Khlifi Bull, Architect of an Open World TM Centre De Services Paris e-mail: yassine.khlifi(a)bull.net tel : 01-69-93-92-92 (223-9292) site : http://www.bull.com |---------+---------------------------------------------> | | squeak-dev-request(a)lists.squeakfou| | | ndation.org | | | Envoyé par : | | | squeak-dev-bounces(a)lists.squeakfou| | | ndation.org | | | | | | | | | 25/03/2009 12:58 | | | Veuillez répondre à squeak-dev | | | | |---------+---------------------------------------------> >-------------------------------------------------------------------------------------------------------------------------------| | | | Pour : squeak-dev(a)lists.squeakfoundation.org | | cc : | | Objet : Squeak-dev Digest, Vol 75, Issue 43 | >-------------------------------------------------------------------------------------------------------------------------------| Send Squeak-dev mailing list submissions to squeak-dev(a)lists.squeakfoundation.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/squeak-dev or, via email, send a message with subject or body 'help' to squeak-dev-request(a)lists.squeakfoundation.org You can reach the person managing the list at squeak-dev-owner(a)lists.squeakfoundation.org When replying, please edit your Subject line so it is more specific than "Re: Contents of Squeak-dev digest..." Today's Topics: 1. WorldState deferredUIMessages queue (Chris Muller) 2. Re: WorldState deferredUIMessages queue (Andreas Raab) 3. Re: WorldState deferredUIMessages queue (Andreas Raab) 4. Re: [bug] xor: is this an old bug or what? (Eliot Miranda) 5. Re: Re: WorldState deferredUIMessages queue (Bert Freudenberg) 6. Re: Re: How to get a list of all plugins in VM (Andreas Raab) (Igor Stasenko) 7. Re: WorldState deferredUIMessages queue (Andreas Raab) 8. Re: Re: WorldState deferredUIMessages queue (Igor Stasenko) 9. Re: Re: OSProcess capabilities on Windows (UZONYI Levente) 10. Agenda for Board meeting March 26th 2009 (Andreas Raab) 11. Re: ProcessWrapperPlugin.dll [was: OSProcess capabilities on Windows] (Aran Lunzer) 12. Re: ProcessWrapperPlugin.dll [was: OSProcess capabilities on Windows] (Andreas Raab) 13. Re: [bug] xor: is this an old bug or what? (Klaus D. Witzel) 14. How to tell if you have a boolean when you care to know (Jerome Peace) 15. Re: ProcessWrapperPlugin.dll [was: OSProcess capabilities on Windows] (Aran Lunzer) 16. Re: ProcessWrapperPlugin.dll [was: OSProcess capabilities on Windows] (Andreas Raab) 17. Re: ProcessWrapperPlugin.dll [was: OSProcess capabilities on Windows] (Aran Lunzer) 18. Re: Re: ProcessWrapperPlugin.dll [was: OSProcess capabilities on Windows] (Simon Kirk) 19. Re: Newbie Questions (Keith Hodges) 20. Monticello compatibility (was Re: Newbie Questions) (Bert Freudenberg) ---------------------------------------------------------------------- Message: 1 Date: Tue, 24 Mar 2009 16:17:37 -0500 From: Chris Muller <ma.chris.m(a)gmail.com> Subject: [squeak-dev] WorldState deferredUIMessages queue To: squeak dev <squeak-dev(a)lists.squeakfoundation.org> Message-ID: <1ac5f6d0903241417h59b47a76o3142401a0a852f35(a)mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1 (3.9 Morphic). With Maui I occassionally get World lockups due to the UI process waiting for the #next of the deferredUIMessages, which is empty. Specifically, the freeze, when it occurs, is always in WorldState>>#runStepMethodsIn:. There's a while loop to process messages in the queue: "Dispatch deferred messages while maintaing rudimentary UI responsiveness." [i < numItems and: [(Time millisecondsSince: stamp) < limit]] whileTrue: [queue next value. i := i + 1]. and its hung waiting for "queue next". But it seems like this shouldn't be possible because, at the top of the method, "numItems" is set to the size of the queue. numItems := queue size. and so the only explanation is, somehow in processing one of the messages, it causes another one to be removed from the queue. This appears to be possible if the first message calls a #doOneCycle, leading it back through this same method.. I do have 4 or 5 #doOneCycles sprinkled around, in order to force correct layout or screen redraws. I'm pretty sure these are causing the deadlock but.. when I tried taking some of them out I get the layout/redraw problem.. Any advice is greatly appreciated. - Chris ------------------------------ Message: 2 Date: Tue, 24 Mar 2009 14:37:26 -0700 From: Andreas Raab <andreas.raab(a)gmx.de> Subject: [squeak-dev] Re: WorldState deferredUIMessages queue To: The general-purpose Squeak developers list <squeak-dev(a)lists.squeakfoundation.org> Message-ID: <49C95296.1030208(a)gmx.de> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Chris Muller wrote: > (3.9 Morphic). With Maui I occassionally get World lockups due to the > UI process waiting for the #next of the deferredUIMessages, which is > empty. > > Specifically, the freeze, when it occurs, is always in > WorldState>>#runStepMethodsIn:. There's a while loop to process > messages in the queue: > > "Dispatch deferred messages while maintaing rudimentary UI responsiveness." > [i < numItems and: [(Time millisecondsSince: stamp) < limit]] > whileTrue: [queue next value. i := i + 1]. This is plain wrong. I don't know what the rationale of the change was but you'll have much better success if you change this to e.g., queue := self class deferredUIMessages. [(msg := queue nextOrNil) == nil] whileFalse: [ msg value. ]. The reason why the original version is wrong is that there is absolutely no assurance that some Morph won't call World doOneCycle which would re-enter the above loop, pull out all of the events and leave the original caller hanging; just as you report. Cheers, - Andreas ------------------------------ Message: 3 Date: Tue, 24 Mar 2009 14:43:24 -0700 From: Andreas Raab <andreas.raab(a)gmx.de> Subject: [squeak-dev] Re: WorldState deferredUIMessages queue To: The general-purpose Squeak developers list <squeak-dev(a)lists.squeakfoundation.org> Message-ID: <49C953FC.70405(a)gmx.de> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Chris Muller wrote: > Any advice is greatly appreciated. Actually, here is a fun test to exercise the problem: testDoOneCycleWorksWithDeferredQueue "Ensure that nested doOneCycles don't break deferred UI messages" | finished | [ WorldState addDeferredUIMessage:[World doOneCycleNow]. WorldState addDeferredUIMessage:["whatever"]. World doOneCycleNow. finished := true. ] valueWithin: 1 second onTimeout:[finished := false]. self assert: finished Cheers, - Andreas ------------------------------ Message: 4 Date: Tue, 24 Mar 2009 15:01:45 -0700 From: Eliot Miranda <eliot.miranda(a)gmail.com> Subject: Re: [squeak-dev] [bug] xor: is this an old bug or what? To: "Randal L. Schwartz" <merlyn(a)stonehenge.com> Cc: The general-purpose Squeak developers list <squeak-dev(a)lists.squeakfoundation.org> Message-ID: <3ac5ce8a0903241501k73fafc2ei142aa2000d4d436a(a)mail.gmail.com> Content-Type: text/plain; charset="iso-8859-1" On Tue, Mar 24, 2009 at 1:36 PM, Randal L. Schwartz <merlyn(a)stonehenge.com>wrote: > >>>>> "Eliot" == Eliot Miranda <eliot.miranda(a)gmail.com> writes: > > Eliot> I think just > > True> xor: aBoolean > Eliot> ^aBoolean not > > False> xor: aBoolean > Eliot> ^aBoolean > > Eliot> and then leave subsequent usage to catch possible type errors; e.g. > (false > Eliot> xor: #blah) ifTrue: ... will raise a mustBeBoolean error. > > What I don't like about this is that the right operand doesn't get a chance > to > "boolify" itself, or define its own xor logic. The double-dispatch > versions > were a lot better at that. If you want to do that you could implement it as False> xor: aBoolean ^aBoolean not not but I'd argue that isn't necessary. The old code didn't type check and we've lived with it for a loooong time. But in any case, the not is a form of double-dispatch. It just points out that one can use not instead of xorTrue and is more comprehensible because "not" is familiar. > > -- > Randal L. Schwartz - Stonehenge Consulting Services, Inc. - +1 503 777 0095 > <merlyn(a)stonehenge.com> <URL:http://www.stonehenge.com/merlyn/> > Smalltalk/Perl/Unix consulting, Technical writing, Comedy, etc. etc. > See http://methodsandmessages.vox.com/ for Smalltalk and Seaside > discussion >

1 0

Does reinstalling a package delete the existing components based on it?
by Frank Church 25 Mar '09

25 Mar '09

I was trying out the Todo demo from HPI and I wanted to try out the Magritte Tutorial, and the Magritte installation prompted me to install Seaside and its related packages. Would the reinstallation clear out all subcomponents based on seaside components? Is there a way to prevent that from happening again? Frank

2 1

How do you start squeak so that the web plugin can be used view the screen?
by Frank Church 25 Mar '09

25 Mar '09

How do you start squeak so that the web plugin can be used view the screen? Does it allow user to interface it as normal, like the regular graphic browser, or is mainly for browsing objects?

3 8

← Newer
1
2
3
4
5
6
7
8
...
18
Older →

Jump to page: