March 2016 - Pharo-users - lists.pharo.org

[Pillar] Ascii doc

by Thibault ARLOING

Hi, Yann Dubois and me were working on an asciidoc exporter for Pillar, he is now ready and available in the development version of Pillar. We will be gratefull for any feedbacks, thanks Good evening Thibault Arloing

March 4, 2016

Re: [Pharo-users] Rubric docs

by Alexandre Bergel

Good question. Once you have an answer, feel free to write a short Help :-) Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. > On Mar 4, 2016, at 3:50 PM, Peter UhnÃ¡k <i.uhnak(a)gmail.com> wrote: > > Hi, > > the (new) code box in Nautilus has some visual cool stuff: > > <rubric.png> > â > my question is: is this documented somewhere? Can I mold it for my own purposes? > > Peter

March 4, 2016

Rubric docs

by Peter UhnÃ¡k

Hi, the (new) code box in Nautilus has some visual cool stuff: â my question is: is this documented somewhere? Can I mold it for my own purposes? Peter

March 4, 2016

Re: [Pharo-users] PharoLauncher eventual slowdown

by Nicolai Hess

2016-03-04 17:15 GMT+01:00 Ben Coman <btc(a)openinworld.com>: > Hi Peter, I see you had this problem 12 months ago. > > http://lists.pharo.org/pipermail/pharo-users_lists.pharo.org/2015-February/… > > What you can try is in development mode, closing the PharoLauncher > window, nil out class variables and garbage collect, then check what > instances remain of PharoLauncher classes. > > cheers -ben > I use pharo launcer a lot (on windows) and I did not see any slow down. But I don't use it for anything else then launching the images. Do you notice the slow down by launching images or do you use the PharoLauncher image for anything else? > > On Fri, Mar 4, 2016 at 6:42 PM, Peter UhnÃ¡k <i.uhnak(a)gmail.com> wrote: > > Yeah I saw that when he was in Prague (incidentally that's where my > launcher > > slowdown started :)). > > > > I've removed write access and will report back in couple of days. :) > > > > Thanks, > > Peter > > > > On Fri, Mar 4, 2016 at 11:24 AM, Damien Cassou <damien.cassou(a)inria.fr> > > wrote: > >> > >> Hi Peter, > >> > >> Peter UhnÃ¡k <i.uhnak(a)gmail.com> writes: > >> > I've been using Pharo Launcher for quite a while and problem that I am > >> > constantly encountering is that launching of it becomes slower and > >> > slower. > >> > >> StÃ©phane, in CC, reported the same months ago on OS X. I don't know if > >> StÃ©phane still experiences the problem. Could you please try to remove > >> write access to the .image and .changes files? > >> > >> -- > >> Damien Cassou > >> http://damiencassou.seasidehosting.st > >> > >> "Success is the ability to go from one failure to another without > >> losing enthusiasm." --Winston Churchill > > > > > >

March 4, 2016

Re: [Pharo-users] Understanding Slang for building a compiler to C++

by ClÃ©ment Bera

Hello Dimitris, In the VMMaker packages you will find Slang. See the generator.image that you can build here: https://github.com/pharo-project/pharo-vm to get the package in Pharo. Slang is used exclusively for VM compilation and simulation. The package named 'VMMaker-Translation to C' does what you are looking for. It translates Smalltalk source code to Smalltalk AST, then Smalltalk AST to Slang AST, then perform some optimizations on Slang AST, then writes the C code. The slang AST is all the class with names starting with T in this package. The CCodeGenerator is the class responsible for C code generation from slang AST. A closed world assumption allows the generator to do inlining efficiently and compile to direct function call, hence C code generation of a single method can be done only by parsing all the slang method needed for C compilation. The closed world is defined according to different settings such as which memory manager or which jit back end is used. There are no polymorphism in the generated c code, though there are polymorphism in Slang, for example all the memory managers are polymorphic with each other, but you have to pick one of them for C compilation. Super sends acts as macro replacements. There are no such things as mapping Smalltalk classes to C++ classes, it's more about compiling a huge pack of functions all together. The other packages of VM Maker are related to the interpreter, the JIT, the Memory manager and the simulator. Code used exclusively for simulation or testing purpose can be Smalltalk, but most code here is in Slang. There are documentation about the VM in general but I don't think there is documentation specifically about slang itself. Slang is meant to compile the VM and only the VM, hence both projects are tied together. It does not feel like it's a good idea to extract the C code generator as some things were hacked in the generator to make VM compilation work, while the VM code was hacked to work with the generator. In fact, each time we want to do something that is not possible in the VM, we hack either the VM code or the slang generator depending on which solution implies the least time consumption over the next few years. You have to know that the Slang to C generation is, in my opinion, the worst code of the whole VM packages. This is the kind of script I use in Squeak to generate the C code for a single smalltalk method and check if everything is correct, I guess it works in Pharo, as you can see, the compilation process is dependent on VM compilation, as you have to precise which JIT and memory manager to use to define correctly the closed world that will be generated and hence what function you can call or inline : (Transcript show: [| sel vmm s cg | sel := #writeImageFileIO. vmm := (VMMaker forPlatform: 'Cross') interpreterClass: CoInterpreter"MT"; options: {#Cogit. Cogit chooseCogitClass name}, #(ObjectMemory Spur32BitCoMemoryManager "NewspeakVM true MULTIPLEBYTECODESETS true" SistaVM false). cg := [vmm buildCodeGeneratorForInterpreter] on: Notification do: [:ex| ex tag == #getVMMaker ifTrue: [ex resume: vmm] ifFalse: [ex pass]]. "cg breakSrcInlineSelector: #readHeapFromImageFile:dataBytes:; breakDestInlineSelector: sel; breakOnInline: false""true". cg vmClass preGenerationHook: cg. cg inferTypesForImplicitlyTypedVariablesAndMethods. cg retainMethods: { sel }. cg prepareMethods. ((sel beginsWith: 'bytecode') or: [sel endsWith: 'Bytecode']) ifTrue: [cg doBasicInlining: true] ifFalse: [cg doInlining: true]. s := ReadWriteStream on: String new. (cg methodNamed: sel) removeUnusedTempsAndNilIfRequiredIn: cg; halt; emitCCodeOn: s generator: cg. s contents] value) I'd recommend you to ask question about this topic on the VM mailing list ( http://lists.squeakfoundation.org/mailman/listinfo/vm-dev) because few people in the Pharo community have a good understanding of Slang, and the ones whodo are also on vm-dev. Have fun :-) 2016-03-04 13:06 GMT+01:00 Dimitris Chloupis <kilon.alios(a)gmail.com>: > Hey pharo experts I am interesting into studying how Slang works for > making a compiler that takes pharo code and turns it to C++ code, my > questions is where to find Slang , how to extract the code that compiles > Slang to C and study it as an example for making my own compiler for C++. >

March 4, 2016

Re: [Pharo-users] PharoLauncher eventual slowdown

by Ben Coman

Hi Peter, I see you had this problem 12 months ago. http://lists.pharo.org/pipermail/pharo-users_lists.pharo.org/2015-February/… What you can try is in development mode, closing the PharoLauncher window, nil out class variables and garbage collect, then check what instances remain of PharoLauncher classes. cheers -ben On Fri, Mar 4, 2016 at 6:42 PM, Peter UhnÃ¡k <i.uhnak(a)gmail.com> wrote: > Yeah I saw that when he was in Prague (incidentally that's where my launcher > slowdown started :)). > > I've removed write access and will report back in couple of days. :) > > Thanks, > Peter > > On Fri, Mar 4, 2016 at 11:24 AM, Damien Cassou <damien.cassou(a)inria.fr> > wrote: >> >> Hi Peter, >> >> Peter UhnÃ¡k <i.uhnak(a)gmail.com> writes: >> > I've been using Pharo Launcher for quite a while and problem that I am >> > constantly encountering is that launching of it becomes slower and >> > slower. >> >> StÃ©phane, in CC, reported the same months ago on OS X. I don't know if >> StÃ©phane still experiences the problem. Could you please try to remove >> write access to the .image and .changes files? >> >> -- >> Damien Cassou >> http://damiencassou.seasidehosting.st >> >> "Success is the ability to go from one failure to another without >> losing enthusiasm." --Winston Churchill > >

March 4, 2016

Re: [Pharo-users] Nautilus code panel unsynchronized with 4.0

by Hilaire

Yeah I guessed so. Cool. Thanks Le 04/03/2016 16:02, Peter UhnÃ¡k a Ã©crit : > Indeed, there's an old issue for > that https://pharo.fogbugz.com/f/cases/13111/Browser-with-no-method-selected-doe… -- Dr. Geo http://drgeo.eu

March 4, 2016

Re: [Pharo-users] Nautilus code panel unsynchronized with 4.0

by Peter UhnÃ¡k

Indeed, there's an old issue for that https://pharo.fogbugz.com/f/cases/13111/Browser-with-no-method-selected-doe… On Fri, Mar 4, 2016 at 3:56 PM, Hilaire <hilaire(a)drgeo.eu> wrote: > Hello, > > I noted, twice since yesterday, Nautilus can have code panel contents > unsynchronized between two instances of itself: > > - two nautilus windows on the same class > - edit a method in window 1 > - look at the modified method on window 2, it is the old code > > Hilaire > > -- > Dr. Geo > http://drgeo.eu > > >

March 4, 2016

Re: [Pharo-users] CDB project

by Nicolas Berveglieri

Thx a lot thats exactly what we wanted ! Nicolas. B 2016-03-04 15:49 GMT+01:00 Sven Van Caekenberghe <sven(a)stfx.eu>: > I am not sure I understand the question correctly, but the closest > equivalent in Pharo is > > readInto: collection startingAt: offset count: requestedCount > "Read requestedCount elements into collection starting at offset, > returning the number of elements read, there could be less elements > available." > > There are others, but this is a fundamental one. > > > On 04 Mar 2016, at 15:43, Nicolas Berveglieri <nicolas.berve(a)gmail.com> > wrote: > > > > Hello, we're looking for a function similar to the function read, having > this prototype: > > > > public int read(byte[] b, > > int off, > > int len) > > throws > > IOException > > (found there: > https://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html) > > > > cheers, > > Nicolas. B > > > > 2016-02-26 16:24 GMT+01:00 Damien Cassou <damien.cassou(a)inria.fr>: > > Nicolas Berveglieri <nicolas.berve(a)gmail.com> writes: > > > > > Also we're looking for some help about file reading with pharo. We > couldn't > > > find sufficient info about it on the web, if anyone has a link to > share we > > > would be gratefull. > > > > the Pharo Mooc contains a few slides about that: > > > > > https://ci.inria.fr/pharo-contribution/job/PharoMooc/lastSuccessfulBuild/ar… > > > > -- > > Damien Cassou > > http://damiencassou.seasidehosting.st > > > > "Success is the ability to go from one failure to another without > > losing enthusiasm." --Winston Churchill > > > > >

March 4, 2016

Nautilus code panel unsynchronized with 4.0

by Hilaire

Hello, I noted, twice since yesterday, Nautilus can have code panel contents unsynchronized between two instances of itself: - two nautilus windows on the same class - edit a method in window 1 - look at the modified method on window 2, it is the old code Hilaire -- Dr. Geo http://drgeo.eu

March 4, 2016