June 2014 - Pharo-dev - lists.pharo.org

[pharo-project/pharo-core] 28f3a2: 40023
by GitHub June 18, 2014

June 18, 2014

Branch: refs/heads/4.0 Home: https://github.com/pharo-project/pharo-core Commit: 28f3a22c70ea5dd7d9e84f51a3d909e71bef214d https://github.com/pharo-project/pharo-core/commit/28f3a22c70ea5dd7d9e84f51… Author: Jenkins Build Server <board(a)pharo-project.org> Date: 2014-06-18 (Wed, 18 Jun 2014) Changed paths: A ScriptLoader40.package/ScriptLoader.class/instance/pharo - scripts/script23.st A ScriptLoader40.package/ScriptLoader.class/instance/pharo - updates/update40023.st M ScriptLoader40.package/ScriptLoader.class/instance/public/commentForCurrentUpdate.st M Tools.package/ImageCleaner.class/instance/api/cleanUpForProduction.st Log Message: ----------- 40023 13332 fix #cleanUpForProduction for 4 https://pharo.fogbugz.com/f/cases/13332 13336 FontChooser and FontInfrastructure do not have the 40 repository added to themselves. https://pharo.fogbugz.com/f/cases/13336 http://files.pharo.org/image/40/40023.zip

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[pharo-project/pharo-core]
by GitHub June 18, 2014

June 18, 2014

Branch: refs/tags/40023 Home: https://github.com/pharo-project/pharo-core

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zip filesystem test cases?
by Tudor Girba June 18, 2014

June 18, 2014

Hi, I am looking into how to fix the Zip FileSystem: https://pharo.fogbugz.com/f/cases/12826/Zip-FileSystem-does-not-work Has any of you ever used it before? Also, Camillo mentioned that he saw some test cases, but I could not find any (I also checked in the repo of Lukas). Does any of you have some more information? Cheers, Doru -- www.tudorgirba.com "Every thing has its own flow"

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Do we need SourceWebBrowser in the image?
by stepharo June 17, 2014

June 17, 2014

this is a browser opening the result of one get: on a url in a workspace. Stef

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Re: [Pharo-dev] ConfigurationOfSandstoneDB?
by Stephan Eggermont June 17, 2014

June 17, 2014

The official repo is: MCHttpRepository location: 'http://smalltalkhub.com/mc/gnaritas/SandstoneDb/main' user: '' password: '' Last change was a year ago, so it might need some changes. Stephan

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ConfigurationOfSandstoneDB?
by Udo Schneider June 17, 2014

June 17, 2014

All, I'm searching for an up-to-date version of ConfigurationOfSandstoneDB. In the past I used the MetacelloRepository on SS. However this doesn't seem to be updated anymore (as a side-effect of SS being made read-only). So can anybody point me to an updated version of ConfigurationOfSandstoneDB or even better to an "official" successor of MetacelloRepository? Thanks, Udo

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prepared inclusion of OSWindow
by stepharo June 17, 2014

June 17, 2014

Hi Igor and Ronie following igor advice I'm preparing to integration OSWindow in Pharo. I copied all the packages to Pharo/OSWindow. Now to fully work I imagine that SDL2 should be linked to the VM so that it can work. I need to know which package make sense to be loaded I imagine that this is OSWindow-Core OSWindow-SDL2 https://pharo.fogbugz.com/default.asp?12743#103040 indicates package: 'NBXLib-Core'; and I wonder why Why do we need also the OSWindow-X11 if we use SDL Stef

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special meaning of keystroke Ctrl+D
by Nicolai Hess June 17, 2014

June 17, 2014

Someone knows for why this is needed: KeyboardEvent>>#hasSpecialCTRLKeyValue " 4 - Character end 1 - Character home " ^ self controlKeyPressed and: [ keyValue <= 26 & (keyValue ~= 4) & (keyValue ~= 1) ] I know that the Ctrl-Key changes some keyvalues and so, the keycharacters have to be recomputed from the keyvalue(look at senders of #hasSpecialCTRLKeyValue). But why are 4 and 1 excluded? At least on windows, ctrl+d is mapped to "4" and with the above method ctrl+d is never recognized as ctrl+d but as ctrl+end.

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Re: [Pharo-dev] Survey: outdated slices
by Stephan Eggermont June 17, 2014

June 17, 2014

Not integrated yet, but this one was for 3.0. https://pharo.fogbugz.com/default.asp?13167#103360 Stephan

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Spur Squeak Trunk Image Available
by Eliot Miranda June 17, 2014

June 17, 2014

Hi All, it gives me great pleasure to let you know that a spur-format trunk Squeak image is finally available at http://www.mirandabanda.org/files/Cog/SpurImages/. Spur VMs are available at http://www.mirandabanda.org/files/Cog/VM/VM.r2987/. Spur is a new object representation and garbage collector for Squeak/Pharo/Croquet/Newspeak. Features The object representation is significantly simpler than the existing one, and hence permits a lot of JIT optimizations, in particular allocating objects in machine code. This speeds up new, new: et al, but also speeds up blocks because contexts and closures are now allocated in machine code. It also provides immediate characters, so for example accessing wide strings is much faster in Spur, since characters do not have to be instantiated to represent characters with codes greater than 255. The garbage collector has a scavenger and a global scan-mark-compact collector. The scavenger is significantly faster than the existing pointer-reversal scan-mark-compact, hence GC performance is much improved. The memory manager manages old space as a sequence of segments, as opposed to the single contiguous space provided by the existing memory manager. The memory manager grows the heap a segment at a time, and can and will release empty segments back to the host OS after a full GC. Hence Spur is able to grow the heap to the limit of available memory without one having to specify the VM's memory size at start-up. The object representation uses "lazy forwarding" to implement become:, creating copies of objects that are becommed, and forwarding the existing objects to the copies. While Spur still scans the stack zone on become to ensure no forwarding pointers to the receiver exist in stack frames (for check-free push and store instance variable operations), it does not scan the entire heap, catching sends to forwarded objects as part of the normal message send class checks, hence following forwarding pointers lazily, and eliminating forwarders during GC. The existing memory manager does a full memory sweep and compact to implement become. Hence Spur provides the performance advantages of direct pointers while providing a significantly faster become. While Spur uses moving GC (scavenging and compaction on full GC), just like the existing memory manager, Spur supports pinning, the ability to stop an object from moving. Old space objects will not be moved if pinned. Attempting to pin a new space object causes a become, forwarding the new space object to a pinned copy in old space. This allows simpler interfacing with foreign code through the FFI, since one can hand out references to pinned objects in the knowledge that they will not be moved by the GC. Finally Spur supports ephemerons in a simple and direct way, providing pre-mortem per-instance finalization. Although the image-level support needs to be written, it should soon be possible to improve the finalization of entities such as buffered files (ensuring they are flushed before being GCed), etc. Future Work Spur is as yet a work in progress. The 32-bit implementation is usable and appears stable. The major missing component is an incremental scan-mark GC that should eliminate long pauses due to the global scan-mark-compact GC (which is still invoked at snapshot time). I hope to start on this soon. But another key facet of Spur is that the object header format and the sizes of objects are common between 32- and 64-bits. In 32-bit and 64-bit Spur, object bodies are multiples of 8 bytes, so there may be an unused slot at the end of a 32-bit object with an odd number of slots. Hence Spur is close to providing a "true" 64-bit system, one with 61-bit SmallIntegers, and 61-bit SmallFloats (objects with the same precision, but less range that 64-bit Float, done by stealing bits from the exponent field). I look forward to collaborating with Esteban Lorenzano on 64-bit Spur and hope that it will be available early next year. Experience I am of course interested in reports of performance effects. Under certain, hopefully rare circumstances, Spur may actually be slower (one is when the number of processes involved in process switching exceeds the number of stack pages in the stack zone). But my limited experience is that Spur is significantly faster than the existing VM. Please post experiences, both positive and negative. Finally, caveat emptor! This is alpha code. Bugs may result in image corruption. If you do use Spur, please try and back up your work just in case. And if anything does go wrong please let me know, preferrably providing a reproducible case. Enjoy! Eliot Miranda

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