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

Glorp and DBXTalk
by Hernan Wilkinson Nov. 21, 2014

Nov. 21, 2014

Hi, quick question, how can I get Glorp for Pharo? And DBXTalk? If anyone can provide me with some links it will be much appreciated :-) -- *HernÃ¡n WilkinsonAgile Software Development, Teaching & Coaching* *Phone: +54 - 011 - *6091 - 3125 *Mobile: +54 - 911 - 4470 - 7207email: hernan.wilkinson(a)10Pines.comsite: http://www.10Pines.com <http://www.10pines.com/>* Address: Alem 693, Floor 5 B, Buenos Aires, Argentina

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[pharo-project/pharo-core]
by GitHub Nov. 21, 2014

Nov. 21, 2014

Branch: refs/tags/40380 Home: https://github.com/pharo-project/pharo-core

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[pharo-project/pharo-core] f9a0b8: 40380
by GitHub Nov. 21, 2014

Nov. 21, 2014

Branch: refs/heads/4.0 Home: https://github.com/pharo-project/pharo-core Commit: f9a0b80a61c7f7cd29f7a833e93475d87b606d21 https://github.com/pharo-project/pharo-core/commit/f9a0b80a61c7f7cd29f7a833… Author: Jenkins Build Server <board(a)pharo-project.org> Date: 2014-11-21 (Fri, 21 Nov 2014) Changed paths: A ScriptLoader40.package/ScriptLoader.class/instance/pharo - scripts/script380.st A ScriptLoader40.package/ScriptLoader.class/instance/pharo - updates/update40380.st M ScriptLoader40.package/ScriptLoader.class/instance/public/commentForCurrentUpdate.st M Text-Edition.package/SimpleEditor.class/instance/nonediting%2Fnontyping keys/cursorHome_.st M Text-Edition.package/TextEditor.class/instance/nonediting%2Fnontyping keys/cursorHome_.st M Versionner-Spec-Browser.package/VersionnerRepositoriesManager.class/instance/initialization/initializeSelectedRemotes.st Log Message: ----------- 40380 14510 Wrong editing history positions after using home-key https://pharo.fogbugz.com/f/cases/14510 14495 Adding dependent projects in Versionner fails (adding to array instead of collection) https://pharo.fogbugz.com/f/cases/14495 http://files.pharo.org/image/40/40380.zip

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Re: [Pharo-dev] ConfigurationOfGlamour not connected to repository
by Stephan Eggermont Nov. 21, 2014

Nov. 21, 2014

Doru wrote: >Indeed, these are not needed. Those groups are not maintainable and make tool building a nightmare. We will remove them from all Moose configurations eventually :). Sorry, afaik the groups are essential complexity and removing them just increases the problems. Configuration management is essentially a 5-dimensional problem and the tools need to support different workflows so they will never be simple. Stephan

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VM fixes to review
by Ben Coman Nov. 21, 2014

Nov. 21, 2014

I notice several VM fixes [1] submitted by Nicolas 6 months ago. They are categorized as Milestone=Later, so I'm bumping them here just in case these slipped through the cracks to get them into Pharo 4. [1] https://pharo.fogbugz.com/default.asp?pgx=LF&ixFilter=36 But then I think I remember that early in Pharo 4 cycle, the Pharo VM was aligned more closely with with Eliot's - so maybe some of these are already included? cheers -ben

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Re: [Pharo-dev] [Vm-dev] Re: [squeak-dev] Float hierarchy for 64-bit Spur
by Ben Coman Nov. 21, 2014

Nov. 21, 2014

Bert Freudenberg wrote: > > > > ------------------------------------------------------------------------ > > > On 21.11.2014, at 04:19, David T. Lewis <lewis(a)mail.msen.com> wrote: > >> On Thu, Nov 20, 2014 at 05:51:42PM -0800, Eliot Miranda wrote: >>> Hi All, >>> >>> 64-bit Spur can usefully provide an immediate float, a 61-bit subset of >>> the ieee double precision float. The scheme steals bits from the mantissa >>> to use for the immediate's 3-bit tag pattern. So values have the same >>> precision as ieee doubles, but can only represent the subset with exponents >>> between 10^-38 and 10^38, the single-precision range. The issue here is >>> how to organize the class hierarchy. >>> >>> The approach that looks best to me is to modify class Float to be an >>> abstract class, and add two subclasses, BoxedFloat and SmallFloat, such >>> that existing boxed instances of Float outside the SmallFloat range will >>> become instances of BoxedFloat and instances within that range will be >>> replaced by references to the relevant SmallFloat. >>> >>> With this approach ... >>> >>> - Float pi etc can still be used, even though they will answer instances of >>> SmallFloat. But tests such as "self assert: result class == Float." will >>> need to be rewritten to e.g. "self assert: result isFloat". >>> >>> - BoxedFloat and SmallFloat will not be mentioned much at all since floats >>> print themselves literally, and so the fact that the classes have changed >>> won't be obvious. >>> >>> - the boxed Float primitives (receiver is a boxed float) live in BoxedFloat >>> and the immediate ones live in SmallFloat. Making SmallFloat a subclass of >>> Float poses problems for all the primitives that do a super send to retry, >>> since the boxed Float prims will be above the unboxed ones and so the boxed >>> ones would have to test for an immediate receiver. >>> >>> >>> An alternative, that VW took (because it has both Float and Double) is to >>> add a superclass, e.g. LimitedPrecisionReal, move most of the methods into >>> it, and keep Float as Float, and add SmallFloat as a subclass of >>> LimitedPrecisionReal. Then while class-side methods such as pi would >>> likely be implemented in LimitedPrecisionReal class, sends to Float to >>> access them find them via inheritance. An automatic reorganization which >>> moves only primitives out of LimitedPrecisionReal is easy to write. >>> >>> Thoughts? >> I have always felt that the mapping of Float to 64-bit double and FloatArray >> to 32-bit float is awkward. It may be that 32-bit floats are becoming less >> relevant nowadays, but if short float values are still important, then it >> would be nice to be able to represent them directly. I like the idea of having >> a Float class and a Double class to represent the two most common representations. >> A class hierarchy that could potentially support this sounds like a good idea to me. >> >> I have no experience with VW, but a LimitedPrecisionReal hierachy sounds like a >> reasonable approach. >> >> Dave > > I'd suggest BoxedDouble and ImmediateDouble as names for the concrete subclasses (*). Names do mean something. (**) > This is a nice idea, except we have the legacy of SmallInteger and LargeInteger, and I don't like the inconsistency of Float not following the same rule. The boxing/unboxing can be covered in the class comment. Unless you want to change to BoxedInteger and ImmediateInteger ? cheers -ben > You're right about the FloatArray confusion. However, note that the IEEE standard calls it single and double. It's only C using "float" to mean "single precision". > > I'd name the abstract superclass Float, for readability, and the isFloat test etc. Also: "Float pi" reads a lot nicer than anything else. I don't see the need for having a deep LimitedPrecisionReal - Float - BoxedDouble/ImmediateDouble deep hierarchy now. > > If we ever add single-precision floats, we should name them BoxedSingle and ImmediateSingle. At that point we might want a Single superclass and a LimitedPrecisionReal supersuperclass, but we can cross that bridge when we get there. > > - Bert - > > (*) Since we're not going to see the class names often, we could even spell it out as BoxedDoublePrecisionFloat and ImmediateDoublePrecisionFloat. Only half joking. It would make the relation to the abstract Float very clear. > > (**) We could also try to make the names googleable. I was surprised to not get a good hit for "boxed immediate". Only "boxed unboxed" finds it. Maybe there are two better words? >

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Re: [Pharo-dev] About the Playground cache
by Stephan Eggermont Nov. 21, 2014

Nov. 21, 2014

Hi Doru, You might want to try it on a machine with a HD instead of SSD Your machine is a few orders of magnitude faster in opening multiple small files Stephan

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[pharo-project/pharo-core]
by GitHub Nov. 21, 2014

Nov. 21, 2014

Branch: refs/tags/40379 Home: https://github.com/pharo-project/pharo-core

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[pharo-project/pharo-core] c3869f: 40379
by GitHub Nov. 21, 2014

Nov. 21, 2014

Branch: refs/heads/4.0 Home: https://github.com/pharo-project/pharo-core Commit: c3869ff98d0993cf66cccb2f345980e673f64ece https://github.com/pharo-project/pharo-core/commit/c3869ff98d0993cf66cccb2f… Author: Jenkins Build Server <board(a)pharo-project.org> Date: 2014-11-21 (Fri, 21 Nov 2014) Changed paths: A AST-Core.package/NumberParser.class/README.md A AST-Core.package/NumberParser.class/class/instance creation/on_.st A AST-Core.package/NumberParser.class/class/instance creation/parse_.st A AST-Core.package/NumberParser.class/class/instance creation/parse_onError_.st A AST-Core.package/NumberParser.class/class/instance creation/squeezeNumberOutOfString_.st A AST-Core.package/NumberParser.class/class/instance creation/squeezeNumberOutOfString_onError_.st A AST-Core.package/NumberParser.class/definition.st A AST-Core.package/NumberParser.class/instance/accessing/allowPlusSign.st A AST-Core.package/NumberParser.class/instance/accessing/allowPlusSignInExponent.st A 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KernelTests.package/NumberParsingTest.class/instance/tests - Integer/testNegativeZero.st R KernelTests.package/NumberParsingTest.class/instance/tests - ScaledDecimal/testScaledDecimalWithTrailingZeroes.st R KernelTests.package/NumberParsingTest.class/instance/tests - ScaledDecimal/testScaledDecimalWithoutScaleSpecification.st R Polymorph-Widgets.package/ThemeIcons.class/instance/private - utilities/clearIcons.st A ScriptLoader40.package/ScriptLoader.class/instance/pharo - scripts/script379.st A ScriptLoader40.package/ScriptLoader.class/instance/pharo - updates/update40379.st M ScriptLoader40.package/ScriptLoader.class/instance/public/commentForCurrentUpdate.st Log Message: ----------- 40379 14511 unused method clearIcons in ThemeIcons https://pharo.fogbugz.com/f/cases/14511 14416 Extract some classes from the Kernel https://pharo.fogbugz.com/f/cases/14416 http://files.pharo.org/image/40/40379.zip

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Case 5959 - Broken process resume interaction with waiting semaphore
by Ben Coman Nov. 21, 2014

Nov. 21, 2014

I went looking at the oldest cases, and found issue 5959 interesting and perhaps within my scope for my first foray into the VM. On build 40360 with the following test script... | sema proc | Transcript clear. sema := Semaphore new. proc := [ sema wait. Transcript crShow: 'signalled' ] proc priority: Processor highestPriority . proc resume. proc suspend. Transcript crShow: 1. proc resume. Transcript crShow: 2. sema signal. Transcript crShow: 'excessSignals=' ; show: sema excessSignals Prior loading attached changeset gives... 1 signalled 2 excessSignals=1 After loading attached changeset gives... 1 2 signalled excessSignals=0 btw, for the test script you need to add Semaphore>>excessSignals ^excessSignals The changeset loads on top of VMMaker updating: * CoInterpreterPrimitives>>primitiveSuspend * CoInterpreterPrimitives>>primitiveResume Now I probably have abused myList to keep the semaphore for primitiveResume to reactive, but I did poke around references to MyListIndex and it seemed myList was written to more than read from. ----------- In the issue there was mention that some libraries may rely on the broken semantics. Anyone know which those might be? cheers -ben https://pharo.fogbugz.com/default.asp?5959 'From Pharo3.0 of 18 March 2013 [Latest update: #30860] on 19 November 2014 at 12:59:04.381324 am'! !CoInterpreterPrimitives methodsFor: 'process primitives' stamp: 'BenComan 11/19/2014 00:34'! primitiveResume "Put this process on the scheduler's lists thus allowing it to proceed next time there is a chance for processes of it's priority level. It must go to the back of its run queue so as not to preempt any already running processes at this level. If the process's priority is higher than the current process, preempt the current process." | proc inInterpreter myList | proc := self stackTop. "rcvr" (objectMemory isContext: (objectMemory fetchPointer: SuspendedContextIndex ofObject: proc)) ifFalse: [^self primitiveFail]. "Check if process we are resuming is waiting on a semaphore" myList := objectMemory fetchPointer: MyListIndex ofObject: proc. (objectMemory fetchClassOf: myList) = (objectMemory splObj: ClassSemaphore) ifTrue: [ | excessSignals | excessSignals := self fetchInteger: ExcessSignalsIndex ofObject: myList. excessSignals > 0 ifTrue: [ "Consume signal and continue with resume" self storeInteger: ExcessSignalsIndex ofObject: myList withValue: excessSignals - 1 ] ifFalse: [ "Revert #suspend action to re-wait on semaphore, and bypass resume" self addLastLink: proc toList: myList. ^self. ]. ]. "We're about to switch process, either to an interpreted frame or a machine code frame. To know whether to return or enter machine code we have to know from whence we came. We could have come from the interpreter, either directly or via a machine code primitive. We could have come from machine code. The instructionPointer tells us where from:" inInterpreter := instructionPointer >= objectMemory startOfMemory. (self resume: proc preemptedYieldingIf: preemptionYields from: CSResume) ifTrue: [self forProcessPrimitiveReturnToExecutivePostContextSwitch: inInterpreter] "Personally I would like to check MyList, which should not be one of the elements of the scheduler lists. But there are awful race conditions in things like should:notTakeMoreThan: that mean we can't. eem 9/27/2010 23:08. e.g. | proc myList classLinkedList | proc := self stackTop. myList := objectMemory fetchPointer: MyListIndex ofObject: proc. classLinkedList := self superclassOf: (objectMemory splObj: ClassSemaphore). ((self fetchClassOfNonInt: myList) ~= classLinkedList and: [objectMemory isContext: (objectMemory fetchPointer: SuspendedContextIndex ofObject: proc)]) ifFalse: [^self primitiveFail]. ''We're about to switch process, either to an interpreted frame or a machine code frame. To know whether to return or enter machine code we have to know from whence we came. We could have come from the interpreter, either directly or via a machine code primitive. We could have come from machine code. The instructionPointer tells us where from:'' inInterpreter := instructionPointer >= objectMemory startOfMemory. (self resume: proc preemptedYieldingIf: preemptionYields from: CSResume) ifTrue: [self forProcessPrimitiveReturnToExecutivePostContextSwitch: inInterpreter]"! ! !CoInterpreterPrimitives methodsFor: 'process primitives' stamp: 'BenComan 11/19/2014 00:32'! primitiveSuspend "Primitive. Suspend the receiver, aProcess such that it can be executed again by sending #resume. If the given process is not currently running, take it off its corresponding list. The primitive returns the list the receiver was previously on." | process myList | process := self stackTop. process = self activeProcess ifTrue: [| inInterpreter | "We're going to switch process, either to an interpreted frame or a machine code frame. To know whether to return or enter machine code we have to know from whence we came. We could have come from the interpreter, either directly or via a machine code primitive. We could have come from machine code. The instructionPointer tells us where from:" self pop: 1 thenPush: objectMemory nilObject. inInterpreter := instructionPointer >= objectMemory startOfMemory. self transferTo: self wakeHighestPriority from: CSSuspend. ^self forProcessPrimitiveReturnToExecutivePostContextSwitch: inInterpreter]. myList := objectMemory fetchPointer: MyListIndex ofObject: process. "XXXX Fixme. We should really check whether myList is a kind of LinkedList or not but we can't easily so just do a quick check for nil which is the most common case." myList = objectMemory nilObject ifTrue:[^self primitiveFail]. self removeProcess: process fromList: myList. self successful ifTrue: [ "Leave waiting-semaphores in myList, since we need #primitiveResume to re-wait on it" (objectMemory fetchClassOf: myList) = (objectMemory splObj: ClassSemaphore) ifFalse: [ objectMemory storePointer: MyListIndex ofObject: process withValue: objectMemory nilObject]. self pop: 1 thenPush: myList]! !

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