- Pharo-users - lists.pharo.org

Re: [Pharo-users] [Oharo-users] Copy AST

by Mark Rizun

As I said, I used veryDeepCopy for copying ASTs, and it worked. But! It takes time to copy:) 2014-11-06 11:59 GMT+02:00 Mark Rizun <mrizun(a)gmail.com>: > You see, when I alpply deepCopy instead of copy, pharo image doesn't > respond:) > What I want is to get 100% independent new object ast2, with same > caracteristics as ast1. > P.S. Uko, thanks veryDeepCopy works. Read the comments to both methods but > still confused why deepCopy didn't work. >

Nov. 6, 2014

Re: [Pharo-users] [Oharo-users] Copy AST

by Mark Rizun

You see, when I alpply deepCopy instead of copy, pharo image doesn't respond:) What I want is to get 100% independent new object ast2, with same caracteristics as ast1. P.S. Uko, thanks veryDeepCopy works. Read the comments to both methods but still confused why deepCopy didn't work.

Nov. 6, 2014

Re: [Pharo-users] [Oharo-users] Copy AST

by Thierry Goubier

Le 05/11/2014 18:04, Mark Rizun a Ã©crit : > Hi everyone, > > I want to get a deep copy of ast. But deepCopy doesn't work:) > What I mean: > > | ast1 ast2 | > ast1 := RBParser parseRewriteExpression: 'self'. > ast2 := ast1 copy."or without copy" > ast1 stop: 99. > ast2 stop > > When evaluate this you get 99. I want it to be 4. > So I want to have separate object ast2 with separate data, not depending > on changes made in ast1. > As I said deepCopy doesn't work. Any ideas? I'd say beware. Deep copying ASTs is hard. You'll need to characterize a bit better what has been copied with deepCopy and what hasn't before starting to hack it. Thierry > > Thanks, > Mark

Nov. 6, 2014

Re: [Pharo-users] [Oharo-users] Copy AST

by Yuriy Tymchuk

Iâm not sure if this is a case, but there is deepCopy and veryDeepCopy, maybe you should take a look at that. Uko > On 05 Nov 2014, at 18:04, Mark Rizun <mrizun(a)gmail.com> wrote: > > Hi everyone, > > I want to get a deep copy of ast. But deepCopy doesn't work:) > What I mean: > > | ast1 ast2 | > ast1 := RBParser parseRewriteExpression: 'self'. > ast2 := ast1 copy."or without copy" > ast1 stop: 99. > ast2 stop > > When evaluate this you get 99. I want it to be 4. > So I want to have separate object ast2 with separate data, not depending on changes made in ast1. > As I said deepCopy doesn't work. Any ideas? > > Thanks, > Mark

Nov. 5, 2014

Re: [Pharo-users] Start up actions

by Carlo

Hi Peter >From my perspective option b. offers the most flexibility and is most explicit although the StartupLoader class (see class comments and examples) seems versatile and simple. > a. Include a file named startup.st in the same folder as the image, and put a script to start the process in this file. Benefit of using an external file as start-up action is that it allows changes to be made to the script independent of the image. Have found this to be useful. Looks like newer images make use of StartupLoader class which uses defined process and lookup procedure to find startup scripts. > b. Add a startup: method to the class controlling the background process, and do Smalltalk addToStartUpList: MyClass. Benefit is that you can make the startup process explicit and add some operational control methods here .e.g start process, report on process, end process. > c. Do Smalltalk addDeferredStartUpAction: [block which starts the process]. This is very low level entry and you could run this and save image but typically you would want to have some operational type control over the process, checks etc. So I would rather stick to a. or b. Cheers Carlo On 05 Nov 2014, at 1:50 PM, Sven Van Caekenberghe <sven(a)stfx.eu> wrote: The absolute simplest thing is to just create the process and save the image with it, it will keep on running. > On 05 Nov 2014, at 12:05, PBKResearch <peter(a)pbkresearch.co.uk> wrote: > > Hello > > I have a puzzle as to how to implement a start-up action. I would like to have a monitoring process running in the background while I am working on my project, and it would be easier if this process started up automatically when the image is loaded. I have hunted through my current image, and I have found three possibilities: > a. Include a file named startup.st in the same folder as the image, and put a script to start the process in this file. > b. Add a startup: method to the class controlling the background process, and do Smalltalk addToStartUpList: MyClass. > c. Do Smalltalk addDeferredStartUpAction: [block which starts the process]. > The first looks easiest, but it seems untidy to rely on having a separate file sored with the image. All these methods should work; is there any reason to prefer any one of them, or any other better method? > > Thanks in advance for any advice. > > Peter Kenny

Nov. 5, 2014

Re: [Pharo-users] FFI structs

by Alain Rastoul

Hi Ronie, Great that you work on a threaded FFI because it is a pain for some libraries. FFI ODBC for example, works very well but is not usable in real applications because of sql locks that locks the pharo vm. I don't like FFI too much, NativeBoost is much better, unfortunately I don't know about other libraries you are talking about (Alien, LowCode and UFFI), but if you achieve doing something better than NativeBoost, it will be a great thing. I wish you succeed. Regards, Alain Le 01/11/2014 00:54, Ronie Salgado a Ã©crit : > Ronie is working on unifying all the api and proposing one syntax > mechanism for > - nativeBoost back-end > - FFI > and may be Alien > > I had a skype session with Eliot the last. He taught me about the > callback mechanism and I am actually going to use Alien for the > callbacks, by adapting it to perform the marshalling into the > UFFI/NativeBoost types. > > In the future, I am planning in using Lowcode to perform the whole > callback process, but now for simplicity I am just going to piggy back > in Alien. > > I still have to finish the callout by fixing a complicated bug. With > Eliot we discussed a workaround for this bug. I haven't implemented > those workaround yet, because I have been a bit busy with my university > studies. > > As long as we keep what is working, ahem, working. I now depend on > quite a couple of FFI related libs. > > What I need is an easy FFI wrapping tool, like > https://github.com/ronsaldo/swig. Is UFFI going that way? > > Well, I made the swig adaptation for NativeBoost. Making it for the UFFI > is actually something trivial. So, we are going to have a powerful FFI > and a binding generator for it. > > The only problem with Swig, is that the bindings generated by it are not > perfect, because it exposes the exact same C API. A C library that uses > some kind of object model, cannot be exposed in a clean object oriented > way cleanly by a generic automatic tool. > > The FFI situation is not good and we know we should improve it. > > For the record, the current FFI situation can be traced to the > historical origins of Smalltalk and even Squeak. The original Smalltalk > was an actual operating system, and Squeak was also made as an operating > system. Because of this, they were not designed to interact with other > languages. > > Getting a perfect FFI is going to take a lot of time, because of other > problems, such as Multi-threading and the mandatory use of non-blocking > IO. Fortunately, Eliot made a way to have a threaded FFI, in which a > single thread owns the VM at a single time. With this threaded FFI we > can have things such as a callback from a different thread, which is > required by some libraries such as the sound API of SDL2. > > Of course the UFFI is going to support this threaded FFI in some point > of time. To support the threaded FFI I only have to pin/unpin some > object, and call two VM functions, disownVM() and ownVM(). > > As for getting some actual parallelism in Pharo, this is something that > I think is going to take a big amount of time. For now the best thing we > can do is to use OpenCL. This week I have been doing some experimenting > in making an API for linear algebra, that uses OpenCL to perform > computations in parallel. Later I will publish a video. > > Greetings, > Ronie > > 2014-10-31 19:23 GMT-03:00 Alain Rastoul > <alf.mmm.cat(a)gmail.com > <mailto:alf.mmm.cat@gmail.com>>: > > Hi Annick, > > you can't pass smalltalk strings or objects to ffi as parameters, > you have to allocate the buffer member of your structure > on the external heap ( plus to avoid being gc'd before ffi call) > with ExternalAddress allocate: <your buffer/string size +1 for > string null termination> > fill your buffer with byteAt:put: method, > and release this memory with free when you have finished. > > not sure, but you could try something like: > > s := '05:45' copyWith: (Character value: 0). > a := ExternalAddress allocate: s size. > s asByteArray withIndexDo: [ :b :i | a byteAt: i put: b ]. > myStruct time: a. > ... call your ffi ... > a free > > > Regards, > > Alain > > Le 29/10/2014 11:59, Annick Fron a Ã©crit : > > I I have a C struct with a char* > > struct result { > char* time } > > I define an ExternalStructure in FFI , with one field of type > char* (note that the syntax char [5] is not accepted ! ). > > defineFields generates the accessors time and time: > > If I use > time: â05:45â > > I get an error. > How do I set a string value in an ExternalStructure ? > > Annick > > > > > > > > >

Nov. 5, 2014

Re: [Pharo-users] Bug? in Filein

by Nicolai Hess

14405 <https://pharo.fogbugz.com/default.asp?14405> (backport pharo3) FileOut creates invalid comment entries for classes with class side methods fix in pharo3inbox 2014-11-04 22:51 GMT+01:00 Nicolai Hess <nicolaihess(a)web.de>: > Fixed and integrated (pharo 40350) > I'll open another issue for backporting to pharo3 > > 2014-11-02 22:24 GMT+01:00 Nicolai Hess <nicolaihess(a)web.de>: > >> Actually it is a bug in FileOUT! >> >> 14377 <https://pharo.fogbugz.com/default.asp?14377> >> FileOut creates invalid comment entries for classes with class side >> methods >> >> >> 2014-11-02 17:42 GMT+01:00 Nicolai Hess <nicolaihess(a)web.de>: >> >>> 2014-10-31 0:11 GMT+01:00 JosÃ© ComesaÃ±a <jose.comesana(a)gmail.com>: >>> >>>> I see. But WATestError it is in the same package it is "Fileing", on >>>> line 3284 and is referenced many times before. I am sorry I have not enough >>>> knowledge about the internals to do more debugging. >>>> >>>> Seems to be a lack of coordination between FileOut and FileIn. Maybe >>>> nothing to do... >>>> >>>> Now a simpler and clearer test: >>>> >>>> 1. Back to the original situation. >>>> 2. FileOut *only* WAContextTest. It has a comment: "I am the base class >>>> for all tests that need a WARequestContext present.", in .st file in line 8. >>>> 3. Remove it. >>>> 4. FileIn again. No errors on Transcript BUT no comment appears for >>>> WAContextTest. >>>> >>>> Maybe, if I get a couple of free hours I could dare to debug a >>>> little.... >>>> >>>> Best >>>> >>>> >>>> 2014-10-30 23:30 GMT+01:00 stepharo <stepharo(a)free.fr>: >>>> >>>>> It says that the class WATestError is not available. >>>>> >>>>> >>>>> >>>>> Yes, I did. It is in the .st file >>>>> >>>>> >>>>> >>>>>> c. You get a bunch of errors in Transcript while filing in >>>>>>> >>>>>> No magic ball so we cannot guess. >>>>>> >>>>>> >>>>> Example of Transcript messages (in case it helps): >>>>> WADocumentHandlerResponseTest>>createAndVerifyBinaryDocumentNamed:hasAttachment: >>>>> (WATestingFiles is Undeclared) >>>>> >>>>> WAExceptionHandlerTest>>testCommaReturnsExceptionSet (WATestError is >>>>> Undeclared) >>>>> >>>>> WAExceptionHandlerTest>>testCommaReturnsExceptionSet (WATestError is >>>>> Undeclared) >>>>> >>>>> WAExceptionHandlerTest>>testCommaReturnsExceptionSet (WATestError is >>>>> Undeclared) >>>>> >>>>> WAExceptionHandlerTest>>testCommaReturnsExceptionSet (WATestError is >>>>> Undeclared) >>>>> >>>>> WAExceptionHandlerTest>>testInternalError (WATestError is >>>>> Undeclared) >>>>> >>>>> >>>>> It happens in more cases. I just took this one because this is a >>>>> package anyone can install in order to reproduce the problem. >>>>> >>>>> Thanks >>>>> >>>>> >>>>> >>>> >>> >>> Yes, it is a bug. Verified on Pharo4 with class ZnMessageBenchmark. The >>> class has a comment, after fileout/remove class/filein this class is >>> without a comment. >>> I'll open a bug report. >>> >>> >> >

Nov. 5, 2014

[Oharo-users] Copy AST

by Mark Rizun

Hi everyone, I want to get a deep copy of ast. But deepCopy doesn't work:) What I mean: | ast1 ast2 | ast1 := RBParser parseRewriteExpression: 'self'. ast2 := ast1 copy."or without copy" ast1 stop: 99. ast2 stop When evaluate this you get 99. I want it to be 4. So I want to have separate object ast2 with separate data, not depending on changes made in ast1. As I said deepCopy doesn't work. Any ideas? Thanks, Mark

Nov. 5, 2014

Re: [Pharo-users] FFI structs

by Annick Fron

This is good news ! Annick Le 30 oct. 2014 Ã 23:37, stepharo <stepharo(a)free.fr> a Ã©crit : > Ronie is working on unifying all the api and proposing one syntax mechanism for > - nativeBoost back-end > - FFI > and may be Alien > > The FFI situation is not good and we know we should improve it. > > On 29/10/14 20:18, Thomas Bany wrote: >> Oops, sorry, I was misslead by Steph reply. >> >> Some of the comments might still hold. For the time: â05:45â code to work, you would need FFI to handle all the hassle of memory management and actually allocate the memory for 5 characters and copying it. I never used FFI but I doubt it does this. >> >> Looking at FFI library, you both have ExternalAddress (for the struct with char*) and ExternalType (for the struct with char[5]) that you can use. For the later solution, it still looks like you should define a specific 5 bytes ArrayOf5Char type. >> >> 2014-10-29 18:34 GMT+01:00 Annick Fron <list(a)afceurope.com>: >> I canât use NativeBoost on the Raspberry, I would be glad if I could !!! >> >> >> Le 29 oct. 2014 Ã 12:18, stepharo <stepharo(a)free.fr> a Ã©crit : >> >> > did you read the NativeBoost tutorial on the PharoForTheEntreprise book? >> > If you do please report potential mistakes so that we can improve. >> > >> > >> > On 29/10/14 05:59, Annick Fron wrote: >> >> I I have a C struct with a char* >> >> >> >> struct result { >> >> char* time } >> >> >> >> I define an ExternalStructure in FFI , with one field of type char* (note that the syntax char [5] is not accepted ! ). >> >> >> >> defineFields generates the accessors time and time: >> >> >> >> If I use >> >> time: â05:45â >> >> >> >> I get an error. >> >> How do I set a string value in an ExternalStructure ? >> >> >> >> Annick >> >> >> >> >> >> >> >> >> >> >> > >> > >> >> >> >

Nov. 5, 2014

Re: [Pharo-users] [ANN]: NewExternalWebBrowser

by Ben Coman

Sean P. DeNigris wrote: > Tudor Girba-2 wrote >> Nice :)... Thanks, > > No problem! BTW let's not depend on NewExternalWebBrowser surviving as the > project's name ;) Don't be a newb... ? ;) > > > > ----- > Cheers, > Sean > -- > View this message in context: http://forum.world.st/ANN-NewExternalWebBrowser-tp4788403p4788461.html > Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. > >

Nov. 5, 2014