Squeak-dev November 2014

squeak-dev@lists.squeakfoundation.org

41 participants
125 discussions

Daily Commit Log
by commits＠source.squeak.org 16 Nov '14

16 Nov '14

Changes to Trunk (http://source.squeak.org/trunk.html) in the last 24 hours: http://lists.squeakfoundation.org/pipermail/packages/2014-November/007366.h… Name: Morphic-bf.751 Ancestors: Morphic-topa.750, Morphic-dhn.723 Merge Morphic-dhn.723: Reduce cropping of SystemWindow submorphs by fullScreen =============================================

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The Trunk: Morphic-bf.751.mcz
by commits＠source.squeak.org 15 Nov '14

15 Nov '14

Bert Freudenberg uploaded a new version of Morphic to project The Trunk: http://source.squeak.org/trunk/Morphic-bf.751.mcz ==================== Summary ==================== Name: Morphic-bf.751 Author: bf Time: 15 November 2014, 6:05:35.432 pm UUID: 5fb78a95-2971-460e-88c7-99b58c3152ca Ancestors: Morphic-topa.750, Morphic-dhn.723 Merge Morphic-dhn.723: Reduce cropping of SystemWindow submorphs by fullScreen =============== Diff against Morphic-topa.750 =============== Item was changed: ----- Method: SystemWindow>>fullScreen (in category 'menu') ----- fullScreen + "Zoom Window to full owner size, allowing for scroll bars and desk margins" - "Zoom Window to Full World size with possible DeskMargins" - "SystemWindow fullScreen" | left right possibleBounds | left := right := 0. self paneMorphs do: [:pane | ((pane isKindOf: ScrollPane) and: [pane retractableScrollBar]) ifTrue: [pane scrollBarOnLeft ifTrue: [left := left max: pane scrollBarThickness] ifFalse: [right := right max: pane scrollBarThickness]]]. + possibleBounds := (RealEstateAgent maximumUsableAreaInWorld: self owner) - possibleBounds := (RealEstateAgent maximumUsableAreaInWorld: self world) insetBy: (left @ 0 corner: right @ 0). Preferences fullScreenLeavesDeskMargins ifTrue: [possibleBounds := possibleBounds insetBy: 22]. self bounds: possibleBounds!

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Avoiding saving the Display bitmap in snapshots [Was Re: [squeak-dev] Too much MC stuff left in image]
by Eliot Miranda 15 Nov '14

15 Nov '14

On Fri, Nov 14, 2014 at 10:58 AM, tim Rowledge <tim(a)rowledge.org> wrote: > > On 14-11-2014, at 10:44 AM, tim Rowledge <tim(a)rowledge.org> wrote: > > > > I wonder where 10Mb of Bitmaps is being used… > > Well, duh, a 1700@1300 Display will do that, mostly. When did screens get > so frakkin huge? Why, when I was a lad we had 640@400 monochrome and > liked it! > It would be cool if Spur could some how handle not saving the display bitmap to the snapshot, given that it'll be repainted anyway. But I want to avoid that old Smalltalk-80 behaviour of the screen visibly shrinking when the tracer is run. Let me throw this out as whitewash. Spur has a segmented memory and can and does avoid writing empty segments (segments that only contain free space) and trailing free space in segments. So if the Display bitmap were in a segment on its won (likely if it is reallocated on every snapshot launch) then with a little bit of finagling it might be simple to avoid writing it to the snapshot. There are obviously tricky details here such as what object it actually writes to the snapshot file. Anyway, something to think about when producing deployment images for the cloud. > tim > -- > tim Rowledge; tim(a)rowledge.org; http://www.rowledge.org/tim > There are two ways to write error-free programs; only the third one works. -- best, Eliot

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editing the Squeak wiki XML file library
by Chris Cunnington 15 Nov '14

15 Nov '14

https://www.dropbox.com/s/xs1gjsi93i4d7rn/pages.zip?dl=0 I was talking to Tim at CSV about the Squeak wiki and he was very interested in editing it. He has a number of ideas for pruning the Squeak wiki. As such, I provide here the entire Squeak wiki as it relates to its XML files. This is all the text content. There are no supporting files for images, code files, etc. It’s 22M if you want to download it and it opens to 6191 XML files. The latest number in box2 is 6199, so it’s almost complete. Updating the content is as easy as copying the eight missing files into your set. After describing the way the XML is laid out, Tim said: “Well maybe we can just sed and grep away some of the pages.” Precisely. There is a caveat that you need to be aware of and Tim was aware of it: links to other pages. It’s not really a problem, I don’t think. Here’s why. Take for example a snippet from 6182.xml: <text>!Introduction *2726* started out very useful and very popular. The links all have asterisks around them (i.e. *2726*). That’s not some pointer to an object. That’s a text reference to file named 2726.xml. Simple, right? The page formatter replaces that with the name of the file. A quick look tells me that 2726.xml is titled SqueakMap: <name>SqueakMap</name> <text>SqueakMap is a tool used by the Squeak community The <name></name> token is interpolated into 6182.xml when it’s formatted so the link appears as SqueakMap and it’s a hyperlink to the other file. All this to say, if Tim or others did want to edit this content, the only thing you need to be aware of before throwing out files is the numbers between the asterisks (i.e. *4444*). Say you wanted to delete 3333.xml (and it’s companion 3333.old), then you might want to do a sed/grep for *3333* over the balance of the files to look for links you have to account for. Perhaps create a script to erase those detected links in a clean way? If it’s a hyperlink in a sentence, then you’d need to replace *3333* with the <name></name> token of 3333, so the sentence still read clearly. It would simply no longer be a hyperlink. So, editing this set of files is pretty trivial. I bet somebody wrote a program to create a graph showing links between XML/HTML files that could be configured to look for tokens of the description *1234*. FWIW, Chris

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Daily Commit Log
by commits＠source.squeak.org 15 Nov '14

15 Nov '14

Changes to Trunk (http://source.squeak.org/trunk.html) in the last 24 hours: http://lists.squeakfoundation.org/pipermail/packages/2014-November/007361.h… Name: HelpSystem-Core-dtl.64 Ancestors: HelpSystem-Core-kfr.63 Class comment for HelpOnHelp - be generic. ============================================= http://lists.squeakfoundation.org/pipermail/packages/2014-November/007362.h… Name: System.spur-cmm.689 Ancestors: System-cmm.689, System.spur-ul.688 System-cmm.689 patched for Spur by SpurBootstrapMonticelloPackagePatcher Cog-eem.213 Populate all LocaleID's 'country's. ============================================= http://lists.squeakfoundation.org/pipermail/packages/2014-November/007363.h… Name: System-cmm.690 Ancestors: System-cmm.689 resetKnownLocales too after setting LocaleID's country's. ============================================= http://lists.squeakfoundation.org/pipermail/packages/2014-November/007364.h… Name: Network-cmm.156 Ancestors: Network-ul.155, Network-cmm.151 Merge cmm.151. ============================================= http://lists.squeakfoundation.org/pipermail/packages/2014-November/007365.h… Name: Network-cmm.151 Ancestors: Network-nice.150 After closing and destroying a SocketStream, reset its buffers back down to 4k in case they had grown to many megabytes. =============================================

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Too much MC stuff left in image
by tim Rowledge 14 Nov '14

14 Nov '14

Even after use of doits such as MCFileBasedRepository flushAllCaches & MCDefinition clearInstances I have 9500 MCVersionInfo and similar numbers of other MC related objects in my image. And 990 SMAccounts? 800 SMPackage? 13000 UUIDs? That all seems a bit excessive somehow. I know there was a conversation about chopping at least some of the MC stuff out (which I think is where the flushAllCaches came from) but it seems there is an awful lot left that could be removed as part of making a deployment image. tim -- tim Rowledge; tim(a)rowledge.org; http://www.rowledge.org/tim How many of you believe in telekinesis? Raise my hands....

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The Trunk: Network-cmm.151.mcz
by commits＠source.squeak.org 14 Nov '14

14 Nov '14

Chris Muller uploaded a new version of Network to project The Trunk: http://source.squeak.org/trunk/Network-cmm.151.mcz ==================== Summary ==================== Name: Network-cmm.151 Author: cmm Time: 24 September 2014, 2:41:23.349 pm UUID: 74ec9de8-3417-462b-9a74-005dfc2e2130 Ancestors: Network-nice.150 After closing and destroying a SocketStream, reset its buffers back down to 4k in case they had grown to many megabytes. =============== Diff against Network-nice.150 =============== Item was changed: ----- Method: SocketStream>>close (in category 'control') ----- close "Flush any data still not sent and take care of the socket." self flush. + socket closeAndDestroy: 30. + "Reclaim memory consumed by possibly very large buffers." + self resetBuffers! - socket closeAndDestroy: 30!

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The Trunk: Network-cmm.156.mcz
by commits＠source.squeak.org 14 Nov '14

14 Nov '14

Chris Muller uploaded a new version of Network to project The Trunk: http://source.squeak.org/trunk/Network-cmm.156.mcz ==================== Summary ==================== Name: Network-cmm.156 Author: cmm Time: 14 November 2014, 3:45:08.102 pm UUID: 70c09308-237a-4764-9385-f4d23c303e40 Ancestors: Network-ul.155, Network-cmm.151 Merge cmm.151. =============== Diff against Network-ul.155 =============== Item was changed: ----- Method: SocketStream>>close (in category 'control') ----- close "Flush any data still not sent and take care of the socket." self flush. + socket closeAndDestroy: 30. + "Reclaim memory consumed by possibly very large buffers." + self resetBuffers! - socket closeAndDestroy: 30!

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The Trunk: System-cmm.690.mcz
by commits＠source.squeak.org 14 Nov '14

14 Nov '14

Chris Muller uploaded a new version of System to project The Trunk: http://source.squeak.org/trunk/System-cmm.690.mcz ==================== Summary ==================== Name: System-cmm.690 Author: cmm Time: 14 November 2014, 2:52:26.443 pm UUID: 0976934b-ddeb-488f-b20b-4a6e0f570098 Ancestors: System-cmm.689 resetKnownLocales too after setting LocaleID's country's. =============== Diff against System-cmm.689 =============== Item was changed: (PackageInfo named: 'System') postscript: '"Preferences already removed by hand, but whose state still lingers:" LocaleID allInstances do: [ : each | each isoLanguage: each isoLanguage isoCountry: (each isoCountry ifNil: [ each isoCountry ]) ]. + LanguageEnvironment knownEnvironments rehash. + Locale resetKnownLocales'! - LanguageEnvironment knownEnvironments rehash'!

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The Trunk: System.spur-cmm.689.mcz
by commits＠source.squeak.org 14 Nov '14

14 Nov '14

Eliot Miranda uploaded a new version of System to project The Trunk: http://source.squeak.org/trunk/System.spur-cmm.689.mcz ==================== Summary ==================== Name: System.spur-cmm.689 Author: eem Time: 14 November 2014, 12:49:44.276 pm UUID: be528d63-c8d8-4f44-90f3-ba58818707f6 Ancestors: System-cmm.689, System.spur-ul.688 System-cmm.689 patched for Spur by SpurBootstrapMonticelloPackagePatcher Cog-eem.213 Populate all LocaleID's 'country's. =============== Diff against System-cmm.689 =============== Item was changed: ----- Method: SmalltalkImage>>compactClassesArray (in category 'special objects') ----- compactClassesArray "Smalltalk compactClassesArray" + "Backward-compatibility support. Spur does not have compact classes." + ^{}! - "Return the array of 31 classes whose instances may be - represented compactly" - ^ self specialObjectsArray at: 29! Item was added: + ----- Method: SmalltalkImage>>growMemoryByAtLeast: (in category 'memory space') ----- + growMemoryByAtLeast: numBytes + "Grow memory by at least the requested number of bytes. + Primitive. Essential. Fail if no memory is available." + <primitive: 180> + (numBytes isInteger and: [numBytes > 0]) ifTrue: + [OutOfMemory signal]. + ^self primitiveFailed! Item was added: + ----- Method: SmalltalkImage>>maxIdentityHash (in category 'system attributes') ----- + maxIdentityHash + "Answer the maximum identityHash value supported by the VM." + <primitive: 176> + ^self primitiveFailed! Item was changed: ----- Method: SmalltalkImage>>recreateSpecialObjectsArray (in category 'special objects') ----- recreateSpecialObjectsArray "Smalltalk recreateSpecialObjectsArray" "To external package developers: **** DO NOT OVERRIDE THIS METHOD. ***** If you are writing a plugin and need additional special object(s) for your own use, use addGCRoot() function and use own, separate special objects registry " "The Special Objects Array is an array of objects used by the Squeak virtual machine. Its contents are critical and accesses to it by the VM are unchecked, so don't even think of playing here unless you know what you are doing." | newArray | + newArray := Array new: 60. - newArray := Array new: 58. "Nil false and true get used throughout the interpreter" newArray at: 1 put: nil. newArray at: 2 put: false. newArray at: 3 put: true. "This association holds the active process (a ProcessScheduler)" newArray at: 4 put: (self specialObjectsArray at: 4) "(self bindingOf: #Processor) but it answers an Alias". "Numerous classes below used for type checking and instantiation" newArray at: 5 put: Bitmap. newArray at: 6 put: SmallInteger. newArray at: 7 put: ByteString. newArray at: 8 put: Array. newArray at: 9 put: Smalltalk. newArray at: 10 put: Float. + newArray at: 11 put: (self globals at: #MethodContext ifAbsent: [self globals at: #Context]). + newArray at: 12 put: nil. "was BlockContext." - newArray at: 11 put: MethodContext. - newArray at: 12 put: BlockContext. newArray at: 13 put: Point. newArray at: 14 put: LargePositiveInteger. newArray at: 15 put: Display. newArray at: 16 put: Message. newArray at: 17 put: CompiledMethod. + newArray at: 18 put: ((self specialObjectsArray at: 18) ifNil: [Semaphore new]). "low space Semaphore" - newArray at: 18 put: (self specialObjectsArray at: 18). - "(low space Semaphore)" newArray at: 19 put: Semaphore. newArray at: 20 put: Character. newArray at: 21 put: #doesNotUnderstand:. newArray at: 22 put: #cannotReturn:. newArray at: 23 put: nil. "This is the process signalling low space." "An array of the 32 selectors that are compiled as special bytecodes, paired alternately with the number of arguments each takes." newArray at: 24 put: #( #+ 1 #- 1 #< 1 #> 1 #<= 1 #>= 1 #= 1 #~= 1 #* 1 #/ 1 #\\ 1 #@ 1 #bitShift: 1 #// 1 #bitAnd: 1 #bitOr: 1 #at: 1 #at:put: 2 #size 0 #next 0 #nextPut: 1 #atEnd 0 #== 1 #class 0 #blockCopy: 1 #value 0 #value: 1 #do: 1 #new 0 #new: 1 #x 0 #y 0 ). "An array of the 255 Characters in ascii order. + Cog inlines table into machine code at: prim so do not regenerate it. + This is nil in Spur, which has immediate Characters." - Cog inlines table into machine code at: prim so do not regenerate it." newArray at: 25 put: (self specialObjectsArray at: 25). newArray at: 26 put: #mustBeBoolean. newArray at: 27 put: ByteArray. newArray at: 28 put: Process. + "An array of up to 31 classes whose instances will have compact headers; an empty array in Spur" - "An array of up to 31 classes whose instances will have compact headers" newArray at: 29 put: self compactClassesArray. + newArray at: 30 put: ((self specialObjectsArray at: 30) ifNil: [Semaphore new]). "delay Semaphore" + newArray at: 31 put: ((self specialObjectsArray at: 31) ifNil: [Semaphore new]). "user interrupt Semaphore" - newArray at: 30 put: (self specialObjectsArray at: 30). "(delay Semaphore)" - newArray at: 31 put: (self specialObjectsArray at: 31). "(user interrupt Semaphore)" "Entries 32 - 34 unreferenced. Previously these contained prototype instances to be copied for fast initialization" + newArray at: 32 put: nil. "was the prototype Float" + newArray at: 33 put: nil. "was the prototype 4-byte LargePositiveInteger" + newArray at: 34 put: nil. "was the prototype Point" - newArray at: 32 put: nil. "was (Float new: 2)" - newArray at: 33 put: nil. "was (LargePositiveInteger new: 4)" - newArray at: 34 put: nil. "was Point new" newArray at: 35 put: #cannotInterpret:. + newArray at: 36 put: nil. "was the prototype MethodContext" - "Note: This must be fixed once we start using context prototypes (yeah, right)" - "(MethodContext new: CompiledMethod fullFrameSize)." - newArray at: 36 put: (self specialObjectsArray at: 36). "Is the prototype MethodContext (unused by the VM)" newArray at: 37 put: BlockClosure. + newArray at: 38 put: nil. "was the prototype BlockContext" - "(BlockContext new: CompiledMethod fullFrameSize)." - newArray at: 38 put: (self specialObjectsArray at: 38). "Is the prototype BlockContext (unused by the VM)" "array of objects referred to by external code" + newArray at: 39 put: (self specialObjectsArray at: 39). "external semaphores" - newArray at: 39 put: (self specialObjectsArray at: 39). "preserve external semaphores" newArray at: 40 put: nil. "Reserved for Mutex in Cog VMs" + newArray at: 41 put: ((self specialObjectsArray at: 41) ifNil: [LinkedList new]). "Reserved for a LinkedList instance for overlapped calls in CogMT" + newArray at: 42 put: ((self specialObjectsArray at: 42) ifNil: [Semaphore new]). "finalization Semaphore" - newArray at: 41 put: nil. "Reserved for a LinkedList instance for overlapped calls in CogMT" - "finalization Semaphore" - newArray at: 42 put: ((self specialObjectsArray at: 42) ifNil: [Semaphore new]). newArray at: 43 put: LargeNegativeInteger. "External objects for callout. Note: Written so that one can actually completely remove the FFI." newArray at: 44 put: (self at: #ExternalAddress ifAbsent: []). newArray at: 45 put: (self at: #ExternalStructure ifAbsent: []). newArray at: 46 put: (self at: #ExternalData ifAbsent: []). newArray at: 47 put: (self at: #ExternalFunction ifAbsent: []). newArray at: 48 put: (self at: #ExternalLibrary ifAbsent: []). newArray at: 49 put: #aboutToReturn:through:. newArray at: 50 put: #run:with:in:. "51 reserved for immutability message" + newArray at: 51 put: #attemptToAssign:withIndex:. - "newArray at: 51 put: #attemptToAssign:withIndex:." - newArray at: 51 put: (self specialObjectsArray at: 51 ifAbsent: []). newArray at: 52 put: #(nil "nil => generic error" #'bad receiver' #'bad argument' #'bad index' #'bad number of arguments' #'inappropriate operation' #'unsupported operation' #'no modification' #'insufficient object memory' #'insufficient C memory' #'not found' #'bad method' #'internal error in named primitive machinery' #'object may move' #'resource limit exceeded' + #'object is pinned' #'primitive write beyond end of object'). - #'object is pinned'). "53 to 55 are for Alien" newArray at: 53 put: (self at: #Alien ifAbsent: []). + newArray at: 54 put: #invokeCallbackContext:. "use invokeCallback:stack:registers:jmpbuf: for old Alien callbacks." - newArray at: 54 put: #invokeCallbackContext::. "use invokeCallback:stack:registers:jmpbuf: for old Alien callbacks." newArray at: 55 put: (self at: #UnsafeAlien ifAbsent: []). + "Used to be WeakFinalizationList for WeakFinalizationList hasNewFinalization, obsoleted by ephemeron support." + newArray at: 56 put: nil. - "Weak reference finalization" - newArray at: 56 put: (self at: #WeakFinalizationList ifAbsent: []). "reserved for foreign callback process" newArray at: 57 put: (self specialObjectsArray at: 57 ifAbsent: []). newArray at: 58 put: #unusedBytecode. + "59 reserved for Sista counter tripped message" + newArray at: 59 put: #conditionalBranchCounterTrippedOn:. + "60 reserved for Sista class trap message" + newArray at: 60 put: #classTrapFor:. "Now replace the interpreter's reference in one atomic operation" + self specialObjectsArray becomeForward: newArray! - self specialObjectsArray becomeForward: newArray - ! Item was changed: ----- Method: SmalltalkImage>>setGCParameters (in category 'snapshot and quit') ----- setGCParameters + "Adjust the VM's default GC parameters to avoid too much tenuring. + Maybe this should be left to the VM?" - "Adjust the VM's default GC parameters to avoid premature tenuring." + | proportion edenSize survivorSize averageObjectSize numObjects | + proportion := 0.9. "tenure when 90% of pastSpace is full" + edenSize := SmalltalkImage current vmParameterAt: 44. + survivorSize := edenSize / 5.0. "David's paper uses 140Kb eden + 2 x 28kb survivor spaces; Spur uses the same ratios :-)" + averageObjectSize := 8 * self wordSize. "a good approximation" + numObjects := (proportion * survivorSize / averageObjectSize) rounded. + SmalltalkImage current vmParameterAt: 6 put: numObjects "tenure when more than this many objects survive the GC"! - self vmParameterAt: 5 put: 4000. "do an incremental GC after this many allocations" - self vmParameterAt: 6 put: 2000. "tenure when more than this many objects survive the GC" - ! Item was changed: ----- Method: SpaceTally>>spaceForInstancesOf: (in category 'instance size') ----- spaceForInstancesOf: aClass + "Answer a pair of the number of bytes consumed by all instances of the + given class, including their object headers, and the number of instances." - "Answer the number of bytes consumed by all instances of the given class, including their object headers and the number of instances." + | instances total | + instances := aClass allInstances. + instances isEmpty ifTrue: [^#(0 0)]. - | smallHeaderSize instVarBytes isVariable bytesPerElement total lastInstance instance instanceCount | - instance := aClass someInstance ifNil: [ ^#(0 0) ]. - smallHeaderSize := aClass isCompact ifTrue: [ 4 ] ifFalse: [ 8 ]. - instVarBytes := aClass instSize * 4. - isVariable := aClass isVariable. - bytesPerElement := isVariable - ifFalse: [ 0 ] - ifTrue: [ aClass isBytes ifTrue: [ 1 ] ifFalse: [ 4 ] ]. total := 0. + aClass isVariable + ifTrue: + [instances do: + [:i| total := total + (aClass byteSizeOfInstanceOfSize: i basicSize)]] + ifFalse: + [total := instances size * aClass byteSizeOfInstance]. + ^{ total. instances size }! - instanceCount := 0. - "A modified version of #allInstancesDo: is inlined here. It avoids an infinite loop when another process is creating new instances of aClass." - self flag: #allInstancesDo:. - lastInstance := - aClass == CompiledMethod "CompiledMethod has special format, see its class comment" - ifTrue: [aClass new] - ifFalse: [aClass basicNew]. - [ instance == lastInstance ] whileFalse: [ - | contentBytes headerBytes | - contentBytes := instVarBytes + (isVariable - ifFalse: [ 0 ] - ifTrue: [ instance basicSize * bytesPerElement ]). - headerBytes := contentBytes > 255 - ifTrue: [ 12 ] - ifFalse: [ smallHeaderSize ]. - total := total + headerBytes + (contentBytes roundUpTo: 4). - instanceCount := instanceCount + 1. - instance := instance nextInstance ]. - ^{ total. instanceCount }! Item was added: + ----- Method: SystemDictionary>>growMemoryByAtLeast: (in category 'memory space') ----- + growMemoryByAtLeast: numBytes + "Grow memory by at least the requested number of bytes. + Primitive. Fail if no memory is available. Essential." + <primitive: 180> + ^(numBytes isInteger and: [numBytes > 0]) + ifTrue: [OutOfMemory signal] + ifFalse: [self primitiveFailed]! Item was added: + ----- Method: SystemDictionary>>maxIdentityHash (in category 'system attributes') ----- + maxIdentityHash + "Answer the maximum identityHash value supported by the VM." + <primitive: 176> + ^self primitiveFailed! Item was added: + ----- Method: SystemDictionary>>setGCParameters (in category 'snapshot and quit') ----- + setGCParameters + "Adjust the VM's default GC parameters to avoid too much tenuring. + Maybe this should be left to the VM?" + + | proportion edenSize survivorSize averageObjectSize numObjects | + proportion := 0.9. "tenure when 90% of pastSpace is full" + edenSize := SmalltalkImage current vmParameterAt: 44. + survivorSize := edenSize / 5.0. "David's paper uses 140Kb eden + 2 x 28kb survivor spaces; Spur uses the same ratios :-)" + averageObjectSize := 8 * self wordSize. "a good approximation" + numObjects := (proportion * survivorSize / averageObjectSize) rounded. + SmalltalkImage current vmParameterAt: 6 put: numObjects "tenure when more than this many objects survive the GC"! Item was added: + ----- Method: SystemNavigation>>allObjects (in category 'query') ----- + allObjects + "Answer an Array of all objects in the system. Fail if + there isn't enough memory to instantiate the result." + <primitive: 178> + ^self primitiveFailed! Item was changed: ----- Method: SystemNavigation>>allObjectsDo: (in category 'query') ----- allObjectsDo: aBlock + "Evaluate the argument, aBlock, for each object in the system, excluding immediates + such as SmallInteger and Character." + self allObjectsOrNil + ifNotNil: [:allObjects| allObjects do: aBlock] + ifNil: + ["Fall back on the old single object primitive code. With closures, this needs + to use an end marker (lastObject) since activation of the block will create + new contexts and cause an infinite loop. The lastObject must be created + before calling someObject, so that the VM can settle the enumeration (e.g. + by flushing new space) as a side effect of someObject" + | object lastObject | + lastObject := Object new. + object := self someObject. + [lastObject == object or: [0 == object]] whileFalse: + [aBlock value: object. + object := object nextObject]]! - "Evaluate the argument, aBlock, for each object in the system - excluding SmallIntegers. With closures, this needs to use an end - marker (lastObject) since activation of the block will create new - contexts and cause an infinite loop." - | object lastObject | - object := self someObject. - lastObject := Object new. - [lastObject == object or: [0 == object]] - whileFalse: [aBlock value: object. - object := object nextObject]! Item was added: + ----- Method: SystemNavigation>>allObjectsOrNil (in category 'query') ----- + allObjectsOrNil + "Answer an Array of all objects in the system. Fail if there isn't + enough memory to instantiate the result and answer nil." + <primitive: 178> + ^nil!

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