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Monitor>>critical: implementation
by Denis Kudriashov Jan. 5, 2016

Jan. 5, 2016

Hello. Here is Monitor code: critical: aBlock > ^[ > self enter. > aBlock value] > ensure: [self exit]. Now look at Semaphore comment and implementation: > We need to catch eventual interruptions very carefully. > The naive approach of just doing, e.g.,: > self wait. > aBlock ensure: [self signal]. > will fail if the active process gets terminated while in the wait. However, the equally naive: > [self wait. > aBlock value] ensure: [self signal]. > will fail too, since the active process may get interrupted while > entering the ensured block and leave the semaphore signaled twice. > > critical: aBlock > | blockValue caught | > caught := false. > [ > caught := true. > self wait. > blockValue := mutuallyExcludedBlock value > ] ensure: [caught ifTrue: [self signal]]. > ^blockValue So Monitor can be corrupted when process which enters critical section will be terminated. "Ensure block" can signal mutex which was not in waiting mode. Which means that next critical call in another Process will be not guarded. What you think? Is my investigation right? I look at users of Monitor. Most time it is used like Mutex. Only #critical: method is used. So Monitor can be replaced by Mutex at that places. And possible problem will be fixed. SharedQueue is classic example for Monitor usage. Interesting is anybody got problems with it?

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[pharo-project/pharo-core] 37b451: 50511
by GitHub Jan. 5, 2016

Jan. 5, 2016

Branch: refs/heads/5.0 Home: https://github.com/pharo-project/pharo-core Commit: 37b4510f6cb328b6f8c46222a65cc445db6d0578 https://github.com/pharo-project/pharo-core/commit/37b4510f6cb328b6f8c46222… Author: Jenkins Build Server <board(a)pharo-project.org> Date: 2016-01-05 (Tue, 05 Jan 2016) Changed paths: A Athens-Cairo.package/AthensCairoMatrix.class/instance/copying/postCopy.st M Athens-Cairo.package/AthensCairoMatrix.class/instance/private/copyFromMatrix_.st M Athens-Cairo.package/AthensCairoMatrix.class/instance/transformations/restoreAfter_.st A Athens-Cairo.package/AthensCairoMatrixTest.class/README.md A Athens-Cairo.package/AthensCairoMatrixTest.class/definition.st A Athens-Cairo.package/AthensCairoMatrixTest.class/instance/tests/testCopy.st A Athens-Cairo.package/AthensCairoMatrixTest.class/instance/tests/testInverted.st M NativeBoost-Core.package/NativeBoost.class/class/testing/isEnabled.st M Nautilus.package/AbstractNautilusUI.class/instance/icon/classIconFor_.st A SUnit-Core.package/TestCase.class/class/testing/hasTestSelectors.st R ScriptLoader50.package/ScriptLoader.class/instance/pharo - scripts/script50510.st A ScriptLoader50.package/ScriptLoader.class/instance/pharo - scripts/script50511.st R ScriptLoader50.package/ScriptLoader.class/instance/pharo - updates/update50510.st A ScriptLoader50.package/ScriptLoader.class/instance/pharo - updates/update50511.st M ScriptLoader50.package/ScriptLoader.class/instance/public/commentForCurrentUpdate.st M Spec-MorphicAdapters.package/MorphicLabelAdapter.class/instance/factory/buildWidget.st Log Message: ----------- 50511 17280 Athens restoreAfter: doesnt work https://pharo.fogbugz.com/f/cases/17280 17308 Only show clickable testIcon for non abstract test classes that has tests https://pharo.fogbugz.com/f/cases/17308 17263 Monkey fails with Exception: PrimitiveFailed: primitive #isEnabled in NativeBoost class failed https://pharo.fogbugz.com/f/cases/17263 17306 MorphicLabelAdapter does not honor initial color https://pharo.fogbugz.com/f/cases/17306 http://files.pharo.org/image/50/50511.zip

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[pharo-project/pharo-core]
by GitHub Jan. 5, 2016

Jan. 5, 2016

Branch: refs/tags/50511 Home: https://github.com/pharo-project/pharo-core

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Reverted changes in Monticello ?
by Thierry Goubier Jan. 5, 2016

Jan. 5, 2016

Hi all, I had an error with the metadata-less mode of gitfiletree, and I discovered that a fix[1], integrated in 50470, was reverted sometime afterwards. And when looking a bit more, 50510 has MonticelloFileTree-Core-TheIntegrator.134 while the latest in main is MonticelloFileTree-Core-TheIntegrator.193 (with not a few fixes). Anybody knows what is happening? Thierry [1] https://pharo.fogbugz.com/f/cases/17125/Metadata-less-compatibility-with-Fi…

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Repeatable VM crash
by Hilaire Jan. 5, 2016

Jan. 5, 2016

When playing with equality in a class hierarchy I have repeatable VM crash. It is today Pharo VM 3.9-7 from Jenkins and Pharo3. Am I using an out of date VM? Crashdump enclosed Hilaire -- Dr. Geo - http://drgeo.eu iStoa - http://istoa.drgeo.eu

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do you know we have an issue tracker? (rant)
by Esteban Lorenzano Jan. 4, 2016

Jan. 4, 2016

Hi guys, Soâ¦ last two weeks I was first in Togo with Stef and after taking holidays for the end of the year. During that time some bugs on new FFI emerged and were talked in this listâ¦ Today I came back to work and I wanted to walk through the issues to priorize and start work on fixing themâ¦ and no reports on the issue tracker :( So Iâm forced to do email-archeology to dig up the problemsâ¦ or just ignore them until a report arrives. What is not in the issue tracker does not exist: PLEASE REPORT YOUR ISSUES. thanks, Esteban

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Kafka protocol
by Robert Withers Jan. 4, 2016

Jan. 4, 2016

This would be awesome in Pharo: https://cwiki.apache.org/confluence/display/KAFKA/A+Guide+To+The+Kafka+Prot…. Since we cannot yet call JARs, implementing the wire protocol and API proxies would really be huge from an enterprise pharo standpoint. If other folks are interested in working on this, I could help out. Each topic has many partitions and replicates for fail-over. Say #pharo has 101 partitions with 2 replicas each, totals 300 partitions and two failovers per partition. Incoming pharo events would be partition by some algorithm. The basic consumer talks to zookeeper to get topology and then talks to partitions with "fetchers" to put blocks of in-sequence events into a shed queue. Then single-thread process them in the application level consumer, by having it consume from the shared queue. The basic consumer reads from zookeeper then writes to various partitions. regards, robert

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NeoJSON: parsing mapped nil fields
by Skip Lentz Jan. 4, 2016

Jan. 4, 2016

Hi all, When parsing with NeoJSON, Iâm experiencing some problems. If I parse a JSON representation using NeoJSONReader>>next (i.e. not according to a schema), it parses nil fields just fine. But when I explicitly set a value schema, it wonât parse it in the case it is nil (or ânullâ in JSON). Is there a way to let it return nil in the case the parser encounters ânullâ, and otherwise serialize it as a value schema (e.g. a Point class). Taking the example from the paper (https://github.com/svenvc/docs/blob/master/neo/neo-json-paper.md <https://github.com/svenvc/docs/blob/master/neo/neo-json-paper.md>): (NeoJSONReader on: ânull' readStream) mapInstVarsFor: Point; nextAs: Point. Is there a way to adapt the above snippet so that it evaluates to ânilâ instead of resulting in an error? I ask because I am parsing an API response which sometimes contains a ânullâ field, and sometimes a JSON object for that field. Thanks.

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Need more success stories
by stepharo Jan. 3, 2016

Jan. 3, 2016

Hi I know some of you have really cool success stories and I need one paragraph. Many people are looking at us via the web. So please take 15 min and write such paragraph. Stef

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Status of GitFileTree in Pharo 5.0 and Spur
by Mariano Martinez Peck Jan. 3, 2016

Jan. 3, 2016

Hi Thierry, I had some problems with OSProcess in 5.0 with Spur so I wonder what's the status with GitFileTree. Is it working with latest 5.0? I tried to search some tests to confirm this but I found none. Thanks in advance, -- Mariano http://marianopeck.wordpress.com

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