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Re: [Pharo-project] Standard input in Pharo?

by Sean P. DeNigris

Sean P. DeNigris wrote > > Because we're looking for "count" number of items all at once, if the > input is shorter than this, it will never return unless an EOF is sent Digging further, I found that the "count" is always 2048 because read buffering is enabled for io streams. When reading a normal file, we have two options - we read the number of characters we were looking for, or we reach EOF first. With stdin however, there is a third option, which is - there aren't enough chars available to fill the buffer and there is also no EOF encountered. The following returns successfully after a line is typed in the terminal (ending in newline): in := FileStream stdin. in disableReadBuffering. "Really only look for the requested number of characters" in next. Here's an issue: http://code.google.com/p/pharo/issues/detail?id=5800 The attached changeset fixes stdin. -- View this message in context: http://forum.world.st/Standard-input-in-Pharo-tp2173080p4607687.html Sent from the Pharo Smalltalk mailing list archive at Nabble.com.

May 4, 2012

Re: [Pharo-project] OSProcess: can't #chDir: '/' on Linux

by David T. Lewis

On Thu, May 03, 2012 at 12:14:21PM +0200, Damien Cassou wrote: > Hi, > > OSProcess thisOSProcess chDir: '/'. > > always returns a > > /: Resource temporarily unavailable Thanks, this is a bug in the plugin that has apparently been there since at least 2006. It's a reversed #ifTrue:ifFalse: so the primitive answers errno on success rather than on failure. Fixed in VMConstruction-Plugins-OSProcessPlugin-dtl.35 on SqueakSource, the patch will need to go into the oscog branch of OSProcessPlugin also. Dave > > > I'm using Pharo 2.0 with #bleedingEdge OSProcess. > > -- > Damien Cassou > http://damiencassou.seasidehosting.st > > "Lambdas are relegated to relative obscurity until Java makes them > popular by not having them." James Iry

May 4, 2012

Re: [Pharo-project] Questionn

by Igor Stasenko

On 2 May 2012 19:47, StÃ©phane Ducasse <stephane.ducasse(a)inria.fr> wrote: > First class instance variables will bring a lot to the system: > Â Â Â Â foundation for a lot of innovation > Â Â Â Â Â Â Â Â - relationships support > Â Â Â Â Â Â Â Â - meta description. > Â Â Â Â Â Â Â Â - bitfields description this one was always overrated, IMO. unless you wanna parse the IP packet headers, where else you want to play with bit fields, and care how they fit in memory? :) > Â Â Â Â Â Â Â Â ... > > Now we should really work to get from the prototype to a fully robust and tested version. > > Stef > > > >> Thanks Camilo - I've tried your image with the latest CogVM for Mac and it's usable. >> >> I understand this is work in progress, are you planning to change Object>>instVarAt: with a new primitive? or will that be handled on the image side? >> >> Apart from the change in the class declaration, do you think that any of the existing code will have to be changed? >> >> What's the biggest advantage of having slots? (and will we also have slots for temp vars?) >> >> Object subclass: #Rectangle >> Â Â Â layout: PointerLayout >> Â Â Â slots: { >> Â Â Â Â Â Â Â #origin => Slot. >> Â Â Â Â Â Â Â #corner => Slot. >> Â Â Â } >> Â Â Â classSlots: {} >> Â Â Â globals: '' >> Â Â Â category: #'Graphics-Primitives' >> >> Display boundingBox instVarAt: #origin >> >> >> On 1 May 2012 09:51, Camillo Bruni <camillobruni(a)gmail.com> wrote: >> and the working protoype (in 1.3 + Helvetia) is avail here: >> >> http://dl.dropbox.com/u/18184943/SlotImage.zip >> >> make sure to run the image in an older vm (squeak 5.XX) >> >> best >> cami >> >> On 2012-04-30, at 22:59, Mariano Martinez Peck wrote: >> >> > All I can do is to recommend you to read this paper: http://rmod.lille.inria.fr/archives/papers/Verw11a-OOSPLA11-FlexibleObjectL… >> > >> > >> > On Mon, Apr 30, 2012 at 8:36 PM, Santiago Bragagnolo <santiagobragagnolo(a)gmail.com> wrote: >> > Hi all! I was chating with Guille, who's blaming me for make a refactor in sunit for pharo 1.4 instead of 2.0 and told me 'pharo 2.0 probably adds class layouts and slots'. Well, i'm with a concrete type inference project, i want to know what is made and who is in that part of the project to annoy and bore him with questions, 'cause probably i'll want to type the slots, but i need to understand the metaphor of the slots implementation. I want to understand too whats implication has the class layout over the types. >> > >> > Santiago. >> > >> > >> > >> > >> > >> > >> > -- >> > Mariano >> > http://marianopeck.wordpress.com >> > >> >> >> > > -- Best regards, Igor Stasenko.

May 4, 2012

Re: [Pharo-project] OSProcess error in 1.3

by David T. Lewis

Hi Gast?n, Yes you are right, and you have found a way to correct the problem. When you do OSProcessAccessor initialize, a new child watcher process will be started, and this will correct any problem in the old one. I am still curious to discover the cause of the original failure. I suspect that it is something that can be corrected with a change to the child watcher process. I'm sorry if I missed your earlier message, I was having trouble with my email last week and I missed some discussions on the list. Dave On Wed, May 02, 2012 at 10:24:43PM -0300, Gast?n Dall' Oglio wrote: > Hi David. > > I send some days ago a mail reporting "process never is completed" in > Windows, and I propose similar steps to reproduce, see: > http://forum.world.st/OSProcess-is-process-done-tp4569088p4570740.html > > Two notes about this previous mail: Two notes about this previous mail: I > say "the image hang", but this was when I evaluate #waitForCommand: and > obviously is related to that the external process is always marked as > running, not just "when I open the image with OSProcess already loaded" how > I says. Another, I do OSProcess command: 'cmd.exe /c dir' en windows 7, > OSProcess command: 'dir' only work in windows xp. > > > Well, I run this and both result in a always running process and thread: > > 1) > OSProcess command: 'cmd.exe /c dir'. => always running process (although > the associated underlying process is complete) > > 2) > OSProcess thisOSProcess restartChildWatcherThread => always running thread. > > As I says in previous mail, if I unload and load OSProcess package then all > begin to work fine. Then, I suspected that was needed rerun some class side > initialize code to solve the problem. And yes!!! That is OSProcessAccessor > initialize. > I added that to > > ThisOSProcess>>startUp: resuming > | aio | > (aio := Smalltalk at: #AioEventHandler) > ifNotNil: [ aio startUp: resuming ]. > *OSProcessAccessor initialize.* > self initializeThisOSProcess > > > Regards. > > > 2012/5/2 David T. Lewis <lewis(a)mail.msen.com> > > > Sean, > > > > Can you please try two things, in this order, and let me know which > > one causes the problem to go away? > > > > 1) Save your image, exit, and restart. Then try > > > > (OSProcess command: 'ls') inspect > > > > and see if it results in a process proxy with run state "complete". > > > > 2) Restart the child watcher > > > > OSProcess accessor restartChildWatcherProcess. > > (OSProcess command: 'ls') inspect > > > > and see if it results in a process proxy with run state "complete". > > > > Thanks, > > Dave > > > > On Tue, May 01, 2012 at 10:22:44PM -0700, Sean P. DeNigris wrote: > > > With the latest OSProcess package from SqS, when I save the image, I get: > > > > > > 2 May 2012 1:20:30 am > > > > > > VM: Mac OS - intel - 1073 - Croquet Closure Cog VM [CoInterpreter > > > VMMaker-oscog-EstebanLorenzano.155] 21.0 > > > Image: Pharo1.3 [Latest update: #13320] > > > > > > UndefinedObject(Object)>>doesNotUnderstand: #wait > > > Receiver: nil > > > Arguments and temporary variables: > > > aMessage: wait > > > exception: MessageNotUnderstood: receiver of "wait" > > is nil > > > resumeValue: nil > > > Receiver's instance variables: > > > nil > > > > > > [[event wait. > > > processSynchronizationDelay wait. > > > self changed: #childProcessStatus] repeat. > > > nil] in UnixOSProcessAccessor>>grimReaperProcess > > > Receiver: a UnixOSProcessAccessor on pid 22740 > > > Arguments and temporary variables: > > > event: nil > > > processSynchronizationDelay: a Delay(20 msecs) > > > Receiver's instance variables: > > > dependents: a DependentsArray(a UnixProcess with pid > > 22740) > > > sessionIdentifier: #[104 195 160 79] > > > canObtainSessionIdentifierFromPlugin: true > > > hasTestEof: nil > > > grimReaper: a Process in > > > MorphicUIManager>>openDebuggerOn:context:label:content...etc... > > > sigChldSemaphore: nil > > > > > > Weird... > > > > > > > > > -- > > > View this message in context: > > http://forum.world.st/OSProcess-error-in-1-3-tp4602389.html > > > Sent from the Pharo Smalltalk mailing list archive at Nabble.com. > > > >

May 4, 2012

Re: [Pharo-project] Standard input in Pharo?

by Sean P. DeNigris

Sean P. DeNigris wrote > > What do I need to do differently? > I found the problem in the VM, which is two-fold: 1. sqFileReadIntoAt reads from stdin with "fread(dst, 1, count, file);". fread reads until EOF. Because we're looking for "count" number of items all at once, if the input is shorter than this, it will never return unless an EOF is sent (ctrl-D on mac). Either of the following (not actually suggesting this as the final patch) fixes the problem and allows input to be read: sqFileReadIntoAt ... do { clearerr(file); if (file == stdin) { printf("Option 1: reading with fgets from stdin...\n"); fgets (dst, count, file); bytesRead = strlen(dst); //printf("Option 2: reading a character at a time with fread from stdin..."); //bytesRead = fread(dst, 1, 1, file); } else { printf("reading other...\n"); bytesRead = fread(dst, 1, count, file); } } while (bytesRead <= 0 && ferror(file) && errno == EINTR); HTH, Sean p.s. this was the same line that was hanging up PipeableOSProcess>>upToEnd... dunno if it's related... -- View this message in context: http://forum.world.st/Standard-input-in-Pharo-tp2173080p4607448.html Sent from the Pharo Smalltalk mailing list archive at Nabble.com.

May 4, 2012

Re: [Pharo-project] Questionn

by Ben Coman

I am really looking forward to the relationship support. I will be trying out the download this weekend. StÃ©phane Ducasse wrote: > First class instance variables will bring a lot to the system: > foundation for a lot of innovation > - relationships support > - meta description. > - bitfields description > ... > > Now we should really work to get from the prototype to a fully robust and tested version. > > Stef > > > > >> Thanks Camilo - I've tried your image with the latest CogVM for Mac and it's usable. >> >> I understand this is work in progress, are you planning to change Object>>instVarAt: with a new primitive? or will that be handled on the image side? >> >> Apart from the change in the class declaration, do you think that any of the existing code will have to be changed? >> >> What's the biggest advantage of having slots? (and will we also have slots for temp vars?) >> >> Object subclass: #Rectangle >> layout: PointerLayout >> slots: { >> #origin => Slot. >> #corner => Slot. >> } >> classSlots: {} >> globals: '' >> category: #'Graphics-Primitives' >> >> Display boundingBox instVarAt: #origin >> >> >> On 1 May 2012 09:51, Camillo Bruni <camillobruni(a)gmail.com> wrote: >> and the working protoype (in 1.3 + Helvetia) is avail here: >> >> http://dl.dropbox.com/u/18184943/SlotImage.zip >> >> make sure to run the image in an older vm (squeak 5.XX) >> >> best >> cami >> >> On 2012-04-30, at 22:59, Mariano Martinez Peck wrote: >> >> >>> All I can do is to recommend you to read this paper: http://rmod.lille.inria.fr/archives/papers/Verw11a-OOSPLA11-FlexibleObjectL… >>> >>> >>> On Mon, Apr 30, 2012 at 8:36 PM, Santiago Bragagnolo <santiagobragagnolo(a)gmail.com> wrote: >>> Hi all! I was chating with Guille, who's blaming me for make a refactor in sunit for pharo 1.4 instead of 2.0 and told me 'pharo 2.0 probably adds class layouts and slots'. Well, i'm with a concrete type inference project, i want to know what is made and who is in that part of the project to annoy and bore him with questions, 'cause probably i'll want to type the slots, but i need to understand the metaphor of the slots implementation. I want to understand too whats implication has the class layout over the types. >>> >>> Santiago. >>> >>> >>> >>> >>> >>> >>> -- >>> Mariano >>> http://marianopeck.wordpress.com >>> >>> >> >> > > > >

May 3, 2012

Re: [Pharo-project] Issue loading NB

by Igor Stasenko

On 3 May 2012 16:53, Guido Chari <charig(a)gmail.com> wrote: > That works, that was what i had done earlier. > > But as NB is not included in Pharo, and has its wiki page with it own > documentation on how to install it (first link in google if you search for > nativeboost) it may be important or to change the installation instructions > or to make them work? Sure thing :) Actually there is no reason why old way should stop working.. i will just need to change the code to load ConfigurationOfNativeBoost package, since before it was assumed that config in same package (NBInstaller). > > Cheers, > Guido. > > 2012/5/3 Camillo Bruni <camillobruni(a)gmail.com> >> >> AFAIK just using ConfigurationOfNativeBoost works. >> I removed NativeBoostInstaller since this is not the common way to install >> stuff in pharo. >> >> can you try to do >> >> ConfigurationOfNativeBoost loadDevelopment >> >> best >> cami >> >> On 2012-05-03, at 15:12, Guido Chari wrote: >> >> > NativeBoost installer is not loading ConfigurationOfNativeBoost. >> > So the command: 'NBInstaller install' is not working. >> > >> > Cheers, >> > Guido. >> >> > -- Best regards, Igor Stasenko.

May 3, 2012

Re: [Pharo-project] NativeBoost help

by Igor Stasenko

On 2 May 2012 18:40, Luc Fabresse <luc.fabresse(a)gmail.com> wrote: > Hi Igor and other NB Gurus, > > Â A group of students is trying to use NativeBoost to wrap the OpenCV C image > library. > Â The problem we are facing is that the function cvSize return a struct. > > Â Â Â typedef struct { int width; int height; } CvSize; > Â Â Â CV_INLINE Â CvSize Â cvSize( int width, int height ); > > Â But the NBExternalStructure seems to not support that if I understood > correctly. > > Â Â Â NBExternalStructure>>coerceReturn: gen > Â Â Â " ... should we support handling return of external structures? " > Â Â Â self error: 'returning pointer to structure?' > > Â Did I miss something? > Â Any idea or workaround? > there is a workaround. all structs in C is returned via pointer. so, actually a true return type of a function is CvSize* so, what you do is to change the return value to simple void* and then copy the contents of struct into instance of corresponding NBExternalStructure subclass using #fromPointer: method.. to conveniently access its fields values. but this is in general, in your case this function is actually inlined by compiler (as CV_INLINE suggests), so there could be even no exported symbol for it in dynamic library. and the function is actually so simple, that you don't need to wrap it at all. you can just create a subclass of NBExternalStructure , named CvSize, implement fieldDesc method as: fieldsDesc ^ #( int width; int height ) and if you invoke: CvSize new width: 1 height:2 it will be equivalent as if you will call cvSize(1,2) function. > Â Thanks, > > Luc -- Best regards, Igor Stasenko.

May 3, 2012

Re: [Pharo-project] Pharo 2.0: Just need a recompileAll or a real problem in background?

by StÃ©phane Ducasse

Mariano did you add a nice comment to the test because I love when I can read a nice explanation like the one of eliot and then only read the code :). Stef On May 3, 2012, at 6:49 PM, Mariano Martinez Peck wrote: > > > Ok. If I understand this correctly, this is yet ANOTHER thing to test, right? I mean, it does not cover my original problem but another one possible ;) > right? > > I was assuming that my test is a superset of yours, but now I see it is not strict enough. It also needs to compare bindings to see that they're identical. I've attached a stricter version. This says that for any global, it should match either the class's notion of what bindingOf: the key is, or bindingOf: should be nil and the binding should be in Undeclared. If the class answers a different binding through bindingOf: or answers no binding and the binding is not in Undeclared then the variable in the method is wrong. > > > Ok, now we agree :) > I commited this version and removed my previous test. > > Thanks! > > > methodsWithUnboundGlobals > "Get all methods that use undeclared global objects that are not listed in Undeclared. For a clean image the result should be empty." > > "SystemNavigation new methodsWithUnboundGlobals" > > ^self allSelect: > [:m| > m literals anySatisfy: > [:l| > l isVariableBinding > and: [l key isSymbol "avoid class-side methodClass literals" > and: [(m methodClass bindingOf: l key) > ifNil: [(Undeclared associationAt: l key ifAbsent: []) ~~ l] > ifNotNil: [:b| b ~~ l]]]]] > > > So I think with this stricter definition self assert: SystemNavigation new methodsWithUnboundGlobals isEmpty is an adequate test. > > > Thanks Eliot. > > > > And I have 6 methods from the classes SmalltalkImage and ScriptLoader and all the 6 literals are pointing to ScriptLoader. So something weird happened with this class. > Any idea? > > For the moment I will update the test and do a Compiler recompileAll. > > > > > > Association >> #literalEqual: otherLiteral > > "Answer true if the receiver and otherLiteral represent the same > > literal. > > Variable bindings are literally equals only if identical. > > This is how variable sharing works, by preserving identity and changing > > only the value." > > ^self == otherLiteral > > > > instead of the Object implementation. > > > > > >> > >> On 1 May 2012 17:52, Mariano Martinez Peck <marianopeck(a)gmail.com> wrote: > >>> > >>> (Smalltalk globals associationAt: #ScriptLoader) == ((SmalltalkImage >> > >>> #shrinkToCore) literalAt: 4) > >>> gives false when it should be true. If I do a Compiler recompileAll it > >>> gets fixed. So, my question is, is that normal? how could that happen? > >>> is there any real problem behind? > >>> > >>> anyway, can we do a recompileAll for the moment? > >>> > >>> thanks! > >>> > >>> -- > >>> Mariano > >>> http://marianopeck.wordpress.com > >>> > >> > > > > > > > > -- > > Mariano > > http://marianopeck.wordpress.com > > > > > > -- > Best regards, > Igor Stasenko. > > > > > -- > Mariano > http://marianopeck.wordpress.com > > > > > -- > Mariano > http://marianopeck.wordpress.com > > > > > -- > best, > Eliot > > > > > -- > Mariano > http://marianopeck.wordpress.com > > > > > -- > best, > Eliot > > > > > -- > Mariano > http://marianopeck.wordpress.com >

May 3, 2012

Re: [Pharo-project] [update 2.0] #20039

by StÃ©phane Ducasse

So now we will have to put in place a process that load pharo for example from pavel image and load the configuration. I think that this is what we will work on with esteban soon. > I asked for this so many times...the answer was "it will be ready before releasing Pharo 2.0". So far I tried unloading ECompletion and I failed. Strange probably because when we cleaned it it was mainly to load it on top and not been part of the image and because because because there are overridden methods. Stef

May 3, 2012