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[Pharo-project] Fwd: [Vm-dev] InputSemaphore on Windows
by StÃ©phane Ducasse April 18, 2010

April 18, 2010

Begin forwarded message: > From: Igor Stasenko <siguctua(a)gmail.com> > Date: April 18, 2010 3:00:02 AM GMT+02:00 > To: Squeak Virtual Machine Development Discussion <vm-dev(a)lists.squeakfoundation.org> > Subject: Re: [Vm-dev] InputSemaphore on Windows > Reply-To: Squeak Virtual Machine Development Discussion <vm-dev(a)lists.squeakfoundation.org> > > > On 16 April 2010 02:07, Andreas Raab <andreas.raab(a)gmx.de> wrote: >> >> On 4/15/2010 3:18 PM, Henrik Sperre Johansen wrote: >>> >>> Is there a reason why this isn't signalled when inputSemaphoreIndex > 0? >> >> None. It just doesn't bite me. If it did I would've fixed it already. Got >> patch? >> >>> In sqWin32Window.c, the comment for synchronizedSignalSemaphoreWithIndex >>> looks somewhat scary... >>> But looking at the svn logs, it seems it never was used in the >>> record...Event() functions at all, so I wondered if a problem was >>> encountered before svn was in use that lead to its removal, or if it's >>> just not done by default? >> >> The short answer is that there are so many potential issues with handling >> semaphore signals properly that at some point I just gave up. At this point, >> there is no reliable way to deliver semaphore signals, they can and they >> *do* get dropped (we've proven that). >> > Wait.. lets us separate the issues. > 1) synchronizedSignalSemaphoreWithIndex() & friends, for signaling an > arbitrary semaphore > 2) an input semaphore, which should be signaled if there are any > events pending for delivery into language side. > > For (2) , i remember you promised to fix that in no time (a fix is > quite trivial) , so then newer images could finally > stop using polling and use an input semaphore instead. > Usually, it is not a big problem with dropping an input semaphore > signals ( if that's ever possible), > because events tend to come at a regular basis, so even if image-side > missed a signal, it can catch up later, > when next event will come by. > >> Cheers, >> - Andreas >> > > -- > Best regards, > Igor Stasenko AKA sig.

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[Pharo-project] Fwd: [Vm-dev] InputSemaphore on Windows
by StÃ©phane Ducasse April 18, 2010

April 18, 2010

Begin forwarded message: > From: Igor Stasenko <siguctua(a)gmail.com> > Date: April 18, 2010 2:51:55 AM GMT+02:00 > To: Squeak Virtual Machine Development Discussion <vm-dev(a)lists.squeakfoundation.org> > Subject: Re: [Vm-dev] InputSemaphore on Windows > Reply-To: Squeak Virtual Machine Development Discussion <vm-dev(a)lists.squeakfoundation.org> > > > On 16 April 2010 01:18, Henrik Sperre Johansen > <henrik.s.johansen(a)veloxit.no> wrote: >> >> Is there a reason why this isn't signalled when inputSemaphoreIndex > 0? >> >> In sqWin32Window.c, the comment for synchronizedSignalSemaphoreWithIndex >> looks somewhat scary... >> But looking at the svn logs, it seems it never was used in the >> record...Event() functions at all, so I wondered if a problem was >> encountered before svn was in use that lead to its removal, or if it's just >> not done by default? >> > This function is not called, because recordXXXEvent() is already synchronous > because VM calls handleEvents(), and during that, no interpreter > activity is possible, > so it is safe to modify an input semaphore state directly. > The synchronizedSignalSemaphoreWithIndex() is used only for cases, > when you need to signal a > semaphore from other thread, than interpreter runs in. > >> Cheers, >> Henry >> > > > > -- > Best regards, > Igor Stasenko AKA sig.

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[Pharo-project] Fwd: [Vm-dev] InputSemaphore on Windows
by StÃ©phane Ducasse April 18, 2010

April 18, 2010

Begin forwarded message: > From: Henrik Sperre Johansen <henrik.s.johansen(a)veloxit.no> > Date: April 18, 2010 2:24:45 AM GMT+02:00 > To: Squeak Virtual Machine Development Discussion <vm-dev(a)lists.squeakfoundation.org> > Subject: Re: [Vm-dev] InputSemaphore on Windows > Reply-To: Squeak Virtual Machine Development Discussion <vm-dev(a)lists.squeakfoundation.org> > > On 16.04.2010 01:07, Andreas Raab wrote: >> >> On 4/15/2010 3:18 PM, Henrik Sperre Johansen wrote: >>> Is there a reason why this isn't signalled when inputSemaphoreIndex > 0? >> >> None. It just doesn't bite me. If it did I would've fixed it already. Got patch? > Not yet, thought I'd ask the question if there was any good reason not to do so first :) > The reason I'd like it to be so, is that Pharo already includes a an EventSensor (InputEventFetcher) which relies on this, and abolishes the polling of EventSensor, but it's not used by default since InputSemaphore is not signaled on all VM's. The code should be easily* portable to Squeak as well. >> >>> In sqWin32Window.c, the comment for synchronizedSignalSemaphoreWithIndex >>> looks somewhat scary... >>> But looking at the svn logs, it seems it never was used in the >>> record...Event() functions at all, so I wondered if a problem was >>> encountered before svn was in use that lead to its removal, or if it's >>> just not done by default? >> >> The short answer is that there are so many potential issues with handling semaphore signals properly that at some point I just gave up. At this point, there is no reliable way to deliver semaphore signals, they can and they *do* get dropped (we've proven that). > As far as I could read from the latest thread about it on the Squeak list http://n4.nabble.com/More-Delay-Semaphore-fun-td67556.html#a67556, this is an issue mostly when the the waiting/signaling process is terminated, which would (probably... ) not be the case for an event fetcher. > > If I get the time to make any progress** I'll send you the modified file for review. > > Cheers, > Henry > > *As in, I haven't done it, but the code should run on both platforms. > ** Something buildable, which works as expected when InputEventSensor is active on Pharo

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[Pharo-project] Text at an angle
by Schwab,Wilhelm K April 18, 2010

April 18, 2010

Hello all, I am trying to reproduce something that I did in Dolphin. It is a grid of colored squares (got that part) with horizontal and vertial text labels on the rows and columns, respectively. How to create the vertical text is not clear to me. One approach would be to draw the text horizontally and then rotate the resulting form. Is there a better way? Bill

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[Pharo-project] Fwd: [Vm-dev] CMake for Windows?
by StÃ©phane Ducasse April 17, 2010

April 17, 2010

Excellent! > >> From: Geoffroy Couprie <geo.couprie(a)gmail.com> >> Date: April 17, 2010 1:23:00 AM GMT+02:00 >> To: Squeak Virtual Machine Development Discussion <vm-dev(a)lists.squeakfoundation.org> >> Subject: Re: [Vm-dev] CMake for Windows? >> Reply-To: Squeak Virtual Machine Development Discussion <vm-dev(a)lists.squeakfoundation.org> >> >> >> Hello, >> >> You'll find my work on the CMake files at >> http://eleves.ec-lille.fr/~couprieg/divers/patches.zip >> >> I put a CMakeLists.txt file just under the platforms/ directory, along >> with the cmake/ directory. These files are based on the unix ones. I >> modified them to change the source directory depending on the >> platform. I also modified the configure file accordingly, but i >> commented the code using subversion for my convenience during >> development (feel free to change it back). >> >> These CMake files are not perfect, it's just the beginning. First, I >> want to make sure that the unix port still builds with my file, and >> then, I'll go on with the config.cmake and build.cmake files for the >> plugins, and I'll clean CMakeLists.txt a bit. >> >> Feel free to comment, but note that I'm beginning with CMake, and that >> I don't write bash code very often. And please, try it with the unix >> port. I don't want to break everything :) >> >> Anyway, it works for me here (I can build a VM on Windows with the >> File, Security, LargeIntegers and MiscPrimitive plugins using >> MSYS+MinGW). >> >> Best regards, >> >> Geoffroy > > > >

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[Pharo-project] Linux graphics for Windows programmers??
by Schwab,Wilhelm K April 16, 2010

April 16, 2010

Hello all, Are there any good tutorials that explain the transition from Windows to Linux with respect to graphics (device contexts, etc.)? I am especially interested in frameworks for printing, and wrappers that provide a canvas interface to a printer. I found a copy of Sophie 1.04 that has some code in Sophie-Printing. Is there anything else I should study? Bill

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[Pharo-project] Issue tracking system
by Torsten Bergmann April 16, 2010

April 16, 2010

>Is there an issue tracking system, web based, which works on Pharo ? I need >one for my enterprise, may be a good way to introduce Smalltalk :) http://www.gjallar.se which is based on Squeak (own framework, no Seaside AFAIK) You should ask GÃ¶ran Krampe (goran at krampe.se) about it. Bye T. -- GRATIS fÃ¼r alle GMX-Mitglieder: Die maxdome Movie-FLAT! Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01

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[Pharo-project] Issue tracking system
by laurent laffont April 16, 2010

April 16, 2010

Hi, Is there an issue tracking system, web based, which works on Pharo ? I need one for my enterprise, may be a good way to introduce Smalltalk :) Cheers, Laurent Laffont

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Re: [Pharo-project] [squeak-dev] Re: iPhone OS 4 SDK, section 3.3.1
by stephane ducasse April 16, 2010

April 16, 2010

Yes extremely sad. I imagine that you saw my mail on esug-list. On Apr 15, 2010, at 8:50 PM, Juan Vuletich wrote: > Andreas Raab wrote: >> On 4/8/2010 2:43 PM, Sean Malloy wrote: >>> Anyone have any thoughts on this change to the agreement? >> >> Just in case anyone had any illusions on this: >> >> http://computinged.wordpress.com/2010/04/15/apple-removes-scratch-from-ipad… >> >> Cheers, >> - Andreas > > Oh! How silly then can be! > > :( > Juan Vuletich >

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[Pharo-project] About HandMorph and its dragged submorphs
by Fernando olivero April 16, 2010

April 16, 2010

Can a morph currently being dragged by the hand receive a notification whenever the hands moves? I couldnt find any conceptual hook by looking at HandMorph or Morph. Also senders of #isHandMorph dont reveal anything. HandMorph>>position: aPoint .... self privateFullMoveBy: .... Morph>> privateFullMoveBy: delta "Private! Relocate me and all of my subMorphs by recursion. Subclasses that implement different coordinate systems may override this method." My workaround is this add a hook on the following method, which recursively gets sent whenever HandMorph>>position: is evaluated. ADDED: MyMorph>>privateFullMoveBy: delta super privateFullMoveBy: delta. owner isHandMorph ifTrue:[ self actOnHandMove ]. Anyone solved this problem before? Thanks, Fernando

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