April 2010 - Pharo-dev - lists.pharo.org

[Pharo-project] [FFI] ExternalStructure ownership (or not) of memory
by Schwab,Wilhelm K April 3, 2010

April 3, 2010

Hello all, Suppose I have a pointer to a structure and I do or do not have the responsibility of reclaiming the memory when a corresponding ExternalStructure sub-instance is finalized. How do I distinguish the two cases? One idea I had is to explicitly set the handle to nil if I do not own the memory, but (please correct me if I'm wrong), I can't do that while I'm still using the instance because it will presumably use the handle in accessing the fields, right? Looking at implementors of #isExternalAddress, maybe the idea is to use a byte array to make a copy of memory and an address to refer to it. What should I be asking? :) Bill

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[Pharo-project] about relative URI
by StÃ©phane Ducasse April 2, 2010

April 2, 2010

I decided to learn something new this evening so I started to read and write tests about URI Now I have a question testRelativeAuthority "self debug: #testRelativeAuthority" | uri relativeURIString | "A relative URI with authority. relative uri does not start with a scheme:." relativeURIString := '//www.pharo-project.org'. uri := URI fromString: relativeURIString. >>> self assert: (uri asString = relativeURIString). Is false because uri asString = 'www.pharo-project.org' and not '//www.pharo-project.org' self deny: (uri isAbsolute). self assert: (uri isRelative). self assert: (uri authority asString = 'www.pharo-project.org'). self deny: (uri isOpaque). So does anybody know what is correct? Similarly testRelativeEmptyAuthority "self debug: #testRelativeEmptyAuthority" | uri uriString | uriString := '//'. "A relative URI with empty (but defined) authority." uri := URI fromString: uriString. self assert: (uri asString = uriString). >>> '' versus '//' self deny: (uri isAbsolute). self deny: (uri authority isNil). self deny: (uri isOpaque). Thanks

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[Pharo-project] Compiling the VM
by Hilaire Fernandes April 2, 2010

April 2, 2010

I have some unmet dependency I can't resolve. I can't find information about the required -dev packages to install. Hilaire -- Configuring squeak 3.11.13-2135 for i686-pc-linux-gnu -- Using source directory ../unix/src -- Setting CFLAGS to -O2 -- internalplugins: UUIDPlugin -- externalplugins: ADPCMCodecPlugin AsynchFilePlugin B3DAcceleratorPlugin Squeak3D BMPReadWriterPlugin B2DPlugin BitBltPlugin CroquetPlugin DSAPrims ZipPlugin DropPlugin SqueakFFIPrims FFTPlugin FT2Plugin FileCopyPlugin FilePlugin FloatArrayPlugin FloatMathPlugin GeniePlugin HostWindowPlugin JPEGReadWriter2Plugin JPEGReaderPlugin JoystickTabletPlugin Klatt LargeIntegers LocalePlugin MIDIPlugin Matrix2x3Plugin MiscPrimitivePlugin Mpeg3Plugin QuicktimePlugin RePlugin SecurityPlugin SerialPlugin SocketPlugin SoundCodecPrims SoundGenerationPlugin SoundPlugin StarSqueakPlugin SurfacePlugin AioPlugin UnixOSProcessPlugin XDisplayControlPlugin -- Using CFLAGS -O2 -- UUIDPlugin: /usr/include/uuid/uuid.h -- UUIDPlugin: /usr/lib/libuuid.so !! B3DAcceleratorPlugin disabled -- Loaded CMakeASMInformation - ASM support is still experimental, please report issues -- checking for module 'freetype2' -- package 'freetype2' not found !! FT2Plugin disabled !! HostWindowPlugin disabled -- Mpeg3Plugin: /usr/lib/libpthread.so -- SocketPlugin: libsocket not found -- SocketPlugin: /usr/lib/libnsl.so -- UnixOSProcessPlugin: /usr/lib/libpthread.so !! XDisplayControlPlugin disabled -- vm-sound-ALSA: /usr/include/alsa/asoundlib.h -- vm-sound-ALSA: /usr/lib/libasound.so !! vm-display-Quartz disabled !! vm-sound-MacOSX disabled !! vm-display-X11 disabled -- vm-display-fbdev: /usr/include/linux/fb.h -- vm-sound-pulse: libpulse-simple not found !! vm-sound-pulse disabled -- vm-sound-NAS: audio/audio.h not found -- vm-sound-NAS: libaudio not found !! vm-sound-NAS disabled -- vm-sound-OSS: /usr/include/alsa/asoundlib.h -- vm-sound-OSS: /usr/lib/libasound.so -- vm-sound-Sun: sys/audioio.h not found -- vm-sound-Sun: sun/audioio.h not found -- vm-sound-Sun: /usr/include/stropts.h !! vm-sound-Sun disabled -- Configuring done -- Generating done -- Build files have been written to: /home/hilaire/Travaux/pharo/Squeak-3.11.3.2135-pharo-src/build

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[Pharo-project] FW: dlopen: I'm stumped
by Schwab,Wilhelm K April 2, 2010

April 2, 2010

Sorry for any duplication, but this should be visible by now (I think). -----Original Message----- From: Schwab,Wilhelm K Sent: Friday, April 02, 2010 7:24 AM To: squeak-dev(a)lists.squeakfoundation.org; pharo-project(a)lists.gforge.inria.fr Subject: dlopen: I'm stumped Hello all, Attached is my attempt at calling dlopen() from Pharo, and it is not going well. The C code below works as expected, so the problem has to be either in my code or something in Pharo or the VM itself. I am fairly certain that loading the attached is safe, but DynamicLinkingLibrary getProcAddress:'cos' from:'libm.so'. crashes the vm in my experience. Any ideas? Bill /* http://www.unix.com/man-page/All/3/dlopen/ Build as: gcc -rdynamic -o fubar fubar.c -ldl */ #include <stdio.h> #include <stdlib.h> #include <dlfcn.h> int main(int argc, char **argv) { void *handle; double (*cosine)(double); char *error; handle = dlopen("libm.so", RTLD_LAZY); if (!handle) { fprintf(stderr, "%s\n", dlerror()); exit(EXIT_FAILURE); } dlerror(); /* Clear any existing error */ /* Writing: cosine = (double (*)(double)) dlsym(handle, "cos"); would seem more natural, but the C99 standard leaves casting from "void *" to a function pointer undefined. The assignment used below is the POSIX.1-2003 (Technical Corrigendum 1) workaround; see the Rationale for the POSIX specification of dlsym(). */ *(void **) (&cosine) = dlsym(handle, "cos"); if ((error = dlerror()) != NULL) { fprintf(stderr, "%s\n", error); exit(EXIT_FAILURE); } printf("%f\n", (*cosine)(2.0)); dlclose(handle); exit(EXIT_SUCCESS); }

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[Pharo-project] [update 1.1] #11305
by Marcus Denker April 2, 2010

April 2, 2010

11305 ----- Issue 2234: Should write tests for Collection>>sorted Issue 2246: remove KedamaFloatArray (this time for real) Issue 2253: fix ScriptLoader>>#cleanUpForRelease -- Marcus Denker -- http://www.marcusdenker.de INRIA Lille -- Nord Europe. Team RMoD.

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[Pharo-project] !| || and !|! as binary methods?
by Ralph Boland April 2, 2010

April 2, 2010

A few days ago I tried to define !| || and !|! as binary methods in Squeak. Today I tried the same with Pharo. They all fail because the parser interprets the '|' character (the second '|' character in the case of ||) as the beginning of the declaration of local variables. Is this a parsing error or the way Squeak/Pharo is intended to be defined? Now you might think !| and !|! are pretty weird (which doesn't invalidate my question) but I think || is pretty natural as a binary method! Regards, Ralph Boland -- Had a wife and kids in Florida, Jack (Nicklaus) Went out for a "ride" but I couldn't get back As a ten timer being hunted down OR When the wife found out who I was knowing (biblically speaking) I hit a hydrant and I just kept going (till I hit a tree). ...

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[Pharo-project] [ANN 1.0] pre-built Pharo Core 1.0
by Marcus Denker April 2, 2010

April 2, 2010

https://gforge.inria.fr/frs/download.php/26775/PharoCore-1.0-10517.zip -- Marcus Denker -- http://www.marcusdenker.de INRIA Lille -- Nord Europe. Team RMoD.

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[Pharo-project] dlopen: I'm stumped
by Schwab,Wilhelm K April 2, 2010

April 2, 2010

Hello all, Attached is my attempt at calling dlopen() from Pharo, and it is not going well. The C code below works as expected, so the problem has to be either in my code or something in Pharo or the VM itself. I am fairly certain that loading the attached is safe, but DynamicLinkingLibrary getProcAddress:'cos' from:'libm.so'. crashes the vm in my experience. Any ideas? Bill /* http://www.unix.com/man-page/All/3/dlopen/ Build as: gcc -rdynamic -o fubar fubar.c -ldl */ #include <stdio.h> #include <stdlib.h> #include <dlfcn.h> int main(int argc, char **argv) { void *handle; double (*cosine)(double); char *error; handle = dlopen("libm.so", RTLD_LAZY); if (!handle) { fprintf(stderr, "%s\n", dlerror()); exit(EXIT_FAILURE); } dlerror(); /* Clear any existing error */ /* Writing: cosine = (double (*)(double)) dlsym(handle, "cos"); would seem more natural, but the C99 standard leaves casting from "void *" to a function pointer undefined. The assignment used below is the POSIX.1-2003 (Technical Corrigendum 1) workaround; see the Rationale for the POSIX specification of dlsym(). */ *(void **) (&cosine) = dlsym(handle, "cos"); if ((error = dlerror()) != NULL) { fprintf(stderr, "%s\n", error); exit(EXIT_FAILURE); } printf("%f\n", (*cosine)(2.0)); dlclose(handle); exit(EXIT_SUCCESS); }

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[Pharo-project] How to measure VM changes from the image side
by Mariano Martinez Peck April 2, 2010

April 2, 2010

Hi folks. I am playing with some important parts of the VM and I would like to measure the impact of this changes. As an example, I am changing the Interpreter >> normalSend which is the code that represents the send of a message (at least that's what I understood). So, you can imagine that this will have an impact ;) So...what I would like to know if is someone has ideas of how can I measure this impact. I though some benchmarks that can be run before and after this change. In Java I know that there are some libraries or suites of benchmarks already written for this kind of purpose or similar. Is there something in Smalltalk ? Do you have some ideas for this ? It would be cool not do depend on network traffic or things like that. It would be cool also if I can do it directly from code so that it is repeatable. Maybe something that requires a lot of process, time, and involve a lot of objects...ideas? I though running all Pharo tests, or test coverage, ScriptLoader cleanUpForRelease, or cleanUpForProduction, run Lints Thanks in advance. Mariano

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[Pharo-project] Cassandra database and Pharo
by Miguel Enrique CobÃ¡ Martinez April 1, 2010

April 1, 2010

If you're interested in NoSQL databases in general and Cassandra in particular, I wrote a little tutorial for accessing a Cassandra server from Pharo. http://miguel.leugim.com.mx/index.php/2010/03/31/accessing-cassandra-from-p… Cheers -- Miguel CobÃ¡ http://miguel.leugim.com.mx

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