October 2015 - Pharo-dev - lists.pharo.org

Ubuntu fullscreen problems
by J.F. Rick Nov. 12, 2015

Nov. 12, 2015

Hi everybody, I just upgraded to Ubuntu 15.10 and am using Unity User Interface. I want Pharo to use the full screen (i.e., above the menu bar and launcher). Inside Pharo, I can choose "Toggle full screen mode". This works to some extent but has some problems: (1) I can no longer switch applications or desktops (i.e., pager). So it stops me doing work where I move between Pharo and a browser. This may be expected functionality. (2) More problematically, when I try to switch out of full screen mode by choosing "Toggle full screen mode", the Pharo interface completely disappears (just a giant gray area) and no mouse or keyboard events seem to register. I have to use command line to kill it. In good news, I can use "save and quit" instead and relaunching it just has it in maximum mode (full screen but launcher and menu bar are visible). I can then toggle full screen mode twice to get back to full screen. I searched for this on FogBugz but found nothing. Is there a workaround? This seems like a VM issue. Is there a newer VM that fixes this? I just used the most recent one on the Pharo 4.0 download page. If nobody has a fix, I'll open a case on FogBugz. This isn't a large problem but it would be nice to have this Cheers, Jeff

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[Reflectivity] Object invalidate now works
by Marcus Denker Nov. 9, 2015

Nov. 9, 2015

Hi, The mechanism that is behind the MetaLinks is now working for Object 50378: Object methods do: #createTwin. Object methods do: #invalidate. This means we are very close on having that working on the whole image. Next steps: -> invalidate the whole kernel. -> then: check/fix putting links on all methods (#before/#after). (there seems a bug in the code dealing with primitives, to check) -> then: meta-recursion stopping links: take care of the code executed until the recursion check is reached. Test. -> First use case: Breakpoints, with IDE integration. Marcus

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code repository options
by Robert Withers Nov. 8, 2015

Nov. 8, 2015

I am interested in keeping my code on github. Is there a way to connect, browse, load github-based Pharo code? What are all the options for storing code onthe net and interacting with it in Pharo? Many thanks, R

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Measuring width string
by Aliaksei Syrel Nov. 7, 2015

Nov. 7, 2015

Hi I'm sending it here so that it doesn't get lost. There are multiple ways to measure string width. In the following examples performance will be tested measuring 10`000 times the width of the following string: *string := 'abcdefghijklmnopqrstuvwxyz 0123456789!@#$%^&*()_+'.* 1) The most straightforward way is to send #widthOfString: to the font. Time to run gives around 250ms. http://ws.stfx.eu/2Q5YA9DFTRDR Resulting value is rounded to integer and seems to be not absolutely correct and precise. 2) More complex way is to go deeper on the level of glyphs and manually summarise the width of each character in the string sending #getGlyphWidth: character to the font. Time to run gives around 750ms. http://ws.stfx.eu/ETBEW1EHAAZ8 Resulting value is float and looks like correct and precise value. 3) Even more complex is to use CairoFontMetricsProvider instead of font's methods. The same as in 2nd case we measure each character. Time to run around 350ms. http://ws.stfx.eu/7I89DMD0ZLM3 Resulting value is exactly the same as in the 2nd case. With almost equal performance to 1st it is nice alternative. 4) One more way is to let native cairo to calculate everything for us. Calls happen through nativeboost. Time to run around 120ms. http://ws.stfx.eu/HYD76OMIOM7L <http://ws.stfx.eu/HYD76OMIOM7L> As result it returns *CairoTextExtents* which allows to calculate width and height with one call. Cheers, Alex

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garbage on transcript
by stepharo Nov. 6, 2015

Nov. 6, 2015

Hi when I define methods and the Transcript is open I get such kind of trace and I do not get where it comes from. I think that this is the syntactical coloring. Would be good to avoid because this is annoying. StoreImporter>>messageSelectorAndArgumentNames (statements is Undeclared) UndefinedObject>>noMethod (messageSelectorAndArgumentNames is Undeclared) Stef

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[ANN] CalipeL: a benchmarking tool for Smalltalk/X and Pharo
by Jan Vrany Nov. 5, 2015

Nov. 5, 2015

Hi there, After more than 2 years of (time-to-time) development and aboutÂ that much time of use, I'd like to announce CalipeL, a tool for benchmarking and monitoring performance regressions. The basic ideas that drove the development: * Benchmarking and (especially) interpreting benchmark resultsÂ Â is always a monkey business. The tool should produce raw numbers, Â letting the user to use whichever statistics she need to make up Â (desired) results. * Benchmark results should be kept and managed at a single place so Â one can view and retrieve all past benchmark results pretty muchÂ Â the same way as one can view and retrieve past versions ofÂ Â the software from a source code management tool. Features: - simple - creating a benchmark is as simple as writing a methodÂ Â in a class - flexible - a special set-up and/or warm-up routines could be Â specified at benchmark-level as well as set of parametersÂ Â to allow fine-grained measurements under different conditions - batch runner - contains a batch runner allowing one to runÂ Â benchmarks from a command line or at CI servers such as Jenkins. - web - comes with simple web interface to gather and processÂ Â benchmark results. However, the web application would deserve Â some more work. Repository: Â https://bitbucket.org/janvrany/jv-calipel Â http://smalltalkhub.com/#!/~JanVrany/CalipeL-S (read-only export Â from the above and Pharo-specific code) More information: Â https://bitbucket.org/janvrany/jv-calipel/wiki/Home I have been using CalipeL for benchmarking and keeping track ofÂ performance of Smalltalk/X VM, STX:LIBJAVA, a PetitParser compilerÂ and other code I was working over the time. Finally, I'd like to thank to Marcel Hlopko for his work on theÂ web application and Jan Kurs for his comments. I hope some of you may find it useful. If you have any commentsÂ or questions, do not hesitate and let me know! Regards, Jan

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Re: [Pharo-dev] [Vm-dev] hello
by Eliot Miranda Nov. 4, 2015

Nov. 4, 2015

Hi SebastiÃ¡n, and welcome! Forgive me for not replying earlier. On Mon, Oct 12, 2015 at 4:54 AM, SebastiÃ¡n Krynski <skrynski(a)gmail.com> wrote: > > Hello my name is SebastiÃ¡n Krynski from Buenos Aires, Argentina. > Just writing to let you know that I'm starting to work on adding an atomic > swap operator in Pharo , guaranteed not to be interrupted by the VM. The > operator will be used this way: > > a :=: b > > meaning 'swap variable a with variable b'. > In order to do this I will be modifying the VM and the Compiler . > > I'm working under the direction of INRIA and Gabriela ArÃ©valo. > Give my regards to Gabriela! One thing is to consider multiple approaches. My friend Maurice Rabb (in the cc line) did a concurrent VM for a smalltalk-like language a few years ago now and he used something more akin to compare-and-swap. e.g. var ?= value := expr would set var to expire if it held the value var and answer true, otherwise it would not change the value of var and answer false. Talk also to Igor Stasenko (also in the cc line) who has thought a lot about this and has written a prototype image-level scheduler based on (IIRC) a couple of different atomic operators. Another thing to think about is goals. Making it convenient to implement lock-free data structures such as a lock-free thread-safe dictionary would be very good. Make sure you look at Cliff Click's work, e.g. at Azul such as A Lock-Free, Wait-Free Hash Table <https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CB4QFj…>. Google cliff click azul lock-free data structures <https://www.google.com/search?client=safari&rls=en&q=cliff+click+azul+lock-…> . Finally, decide where you want to discuss this. My preference is for you to at least include vm-dev, since this is definitely to do with the byte code set and the VM. But the data structure piece and the use is more generally useful. So I see no problem including vm-dev, pharos-dev and the general purpose squeak list. The more the merrier. A couple of questions: How long will your work with Gabriela last? Is this a master's project or a PhD or...? Good luck! _,,,^..^,,,_ best, Eliot

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Metacello and preparing a release?
by Holger Freyther Nov. 2, 2015

Nov. 2, 2015

Hi, I have an application that is about to be moved into production. Currently it is pulling "stable" or sometimes bleedingEdge of other configurations. After the system moves from testing into production I would like to have tight control of which packages are updated from one version to another. E.g. not have a Voyage "stable" upgrade just because there is a new stable version but probably at the same time still use a symbolic reference myapp-stable-5 to load the package? Is there a common/known to work approach. I could identify all used Metacello configs and move them to my own infrastructure and then copy the use packages as well. Is there tooling support for adding such a "freeze"? How do other handle a release of an application that needs to be updated in an "incremental" way? cheers holger

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tests should be green
by Nicolai Hess Nov. 1, 2015

Nov. 1, 2015

Please, someone can look at the Collections-Tests The ReleaseTest complains about testLocalMethodsOfTheClassShouldNotBeRepeatedInItsTraits (These are all Test-subclasses that use traits, but all(!) trait method are compiled in the class instead, this happened after someone moved the Test packages (for bootstrap?) OrderedCollectionTest FloatArrayTest ArrayTest DateTest HeapTest MorphicTextAdapter LinkedListTest DatePrintFormatTester StackTest CheckboxButtonMorph IntervalTest DateAndTimeTest SimpleButtonMorph MethodDictionaryTest SetTest DictionaryTest BagTest SymbolTest StringTest CollectionRootTest SortedCollectionTest

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Does anyone remember details of a "pro-Smalltalk" merger circa 2013?
by Richard Sargent Nov. 1, 2015

Nov. 1, 2015

I heard an anecdote of a recent merger between two companies in which one had over 200 people supporting a Java application and the other had ~25 people supporting a Smalltalk application. The surprising result was that the Smalltalk application was selected for the merged company rather than the Java one. I would like to know which companies were involved, when this occurred, and what the precise details were. Thank you! -- View this message in context: http://forum.world.st/Does-anyone-remember-details-of-a-pro-Smalltalk-merge… Sent from the Pharo Smalltalk Developers mailing list archive at Nabble.com.

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