author | Claus Gittinger <cg@exept.de> |
Thu, 23 Nov 1995 18:00:32 +0100 | |
changeset 628 | 7aa563e4c64a |
parent 604 | 0e1ec470923d |
child 681 | ec92d405d0a9 |
permissions | -rw-r--r-- |
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" |
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COPYRIGHT (c) 1991 by Claus Gittinger |
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All Rights Reserved |
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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
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inclusion of the above copyright notice. This software may not |
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be provided or otherwise made available to, or used by, any |
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other person. No title to or ownership of the software is |
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hereby transferred. |
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" |
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Array subclass:#WeakArray |
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instanceVariableNames:'watcher dependents' |
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classVariableNames:'RegistrationFailedSignal AlreadyInitialized' |
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poolDictionaries:'' |
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category:'Collections-Arrayed' |
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! |
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!WeakArray class methodsFor:'documentation'! |
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copyright |
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" |
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COPYRIGHT (c) 1991 by Claus Gittinger |
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All Rights Reserved |
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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
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inclusion of the above copyright notice. This software may not |
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be provided or otherwise made available to, or used by, any |
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other person. No title to or ownership of the software is |
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hereby transferred. |
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" |
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! |
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||
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documentation |
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" |
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WeakArrays can be used to trace disposal of objects; in contrast to other |
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objects, references by WeakArrays will NOT keep an object from dieing. |
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Instead, whenever an object kept in a WeakArray dies, its entry is nilled, |
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and the WeakArray informed by the storage manager. |
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You can use WeakArrays to track disposal of objects which keep external |
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world resources. For example, FileStreams must close their underlying |
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file when disposed (otherwise you could run out of OS filedescriptors). |
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This can be done by keeping the FileStream objects in a weakArray, and |
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keep a parallel array of filedescriptors. Whenever a fileStream gets |
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free, search both arrays for an index where the stream is nil, but the |
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filedescriptor is non-nil. Then close that file, and nil the filedescriptor |
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entry. Notice, that there is a class (Registry) which does exactly this in |
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a more programmer friendly way. |
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Another application is caching of data: keep it in a weakArray, so the |
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data in that cache will not be unreclaimable due to being cached. |
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(for example, the ResourcePack class uses a WeakArray to cache recently |
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used resource data for a while). |
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The way in which weakArrays get informed by the runtime system is via |
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an interrupt (DisposeInterrupt). The reason for not sending messages |
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directly from the VM is to make it possible to run the finalization |
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code at lower priority or from another class. |
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Also, as a side effect, it is possible to delay finalization by blocking |
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interrupts. |
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This interrupt is cought in ObjectMemory and informs the weakArray, |
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which in turn informs its watcher and pissibly the dependents. |
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Having two mechanisms here (i.e. watcher & dependent) is a historic leftover; |
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I dont know, which of the two mechanisms will survive in the long run - |
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I started with the watcher, but now switch to dependencies since they seem |
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to offer more flexibility (although watcher notification ). |
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Be prepared, that the watcher mechanism may vanish in the future |
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(i.e. use dependents for your applications). |
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NOTICE: WeakArray handling adds some overhead to the VM (each weakarray |
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is scanned after each GC). It is uncertain, if the current mechanism works well |
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with (say) ten-thousands of weakArrays. |
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instanceVariables: |
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watcher if non-nil, gets informed via #informDispose |
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that the weakArray has lost pointers. |
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dependents get informed via #change |
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that the weakArray has lost pointers. |
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classVariables: |
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RegistrationFailedSignal raised if a weakArray cannot be |
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registered by the VM. This only happens, |
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if the VM has to resize its shadow tables |
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and is running out of malloc-memory. |
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" |
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! ! |
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!WeakArray class methodsFor:'initialization'! |
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initialize |
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"setup the private signal" |
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101 |
RegistrationFailedSignal isNil ifTrue:[ |
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RegistrationFailedSignal := ErrorSignal newSignalMayProceed:true. |
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RegistrationFailedSignal nameClass:self message:#registrationFailedSignal. |
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RegistrationFailedSignal notifierString:'weakArray registration failed'. |
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] |
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! ! |
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!WeakArray class methodsFor:'instance creation'! |
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new:size |
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"return a new weakArray with size slots" |
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"This is a kludge: I would like to set WEAK-flag in the classes |
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initialize method, but (currently) the order in which the class-initialize |
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methods are called is not defined ... |
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... therefore it could happen, that a WeakArray is used by other |
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classes initialize method BEFORE this method is evaluated. |
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To avoid this, the WEAK bit in the class is set here, when the very first |
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WeakArray is created." |
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AlreadyInitialized isNil ifTrue:[ |
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self flags:(Behavior flagWeakPointers). |
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AlreadyInitialized := true |
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]. |
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^ (self basicNew:size) registerAsWeakArray |
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! ! |
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!WeakArray methodsFor:'GC registration'! |
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registerAsWeakArray |
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"register the receiver in the VM - |
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i.e. tell the VM to nil disposed entries in the receiver |
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and notify the disposeInterruptHandler whenever that happened." |
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|ok| |
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%{ |
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OBJ __addShadowObject(); |
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ok = __addShadowObject(self, 0); |
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if (ok == false) { |
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/* |
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* this happens when too many shadow objects are |
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* already there, collect garbage to get rid of |
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* obsolete ones, and try again. |
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* since a full collect is expensive, we try |
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* a scavenge first, doing a full collect only if |
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* that does not help. |
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* |
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* THIS MAY OR MAY NOT BE A GOOD IDEA: although it reduces |
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* the number of shadow objects that have to be |
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* processed at GC time, it may create a long delay here, |
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* at shadow object creation time. |
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* Dont know which is better ... |
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*/ |
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__nonTenuringScavenge(__context); |
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ok = __addShadowObject(self, 0); |
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#ifdef OLD |
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if (ok == false) { |
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/* |
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* try more ... |
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*/ |
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__scavenge(__context); |
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ok = __addShadowObject(self, 0); |
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#endif |
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if (ok == false) { |
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extern int __oldGCGeneration__, __igcGeneration__; |
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/* |
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* hard stuff - need full collect |
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* if this is the very first GC, assume that we are in |
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* the startup phase. Then do no GC. |
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* Heuristics showed, that this GC does not find much ... |
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*/ |
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if ((__oldGCGeneration__ != 0) || (__igcGeneration__ != 0)) { |
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__markAndSweepIfUseful(__context); |
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ok = __addShadowObject(self, 0); |
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} |
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if (ok == false) { |
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/* |
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* mhmh - it seems that there are really many shadow |
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* objects around - force creation |
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*/ |
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ok = __addShadowObject(self, 1); |
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if (ok == false) { |
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/* no chance - something must be wrong */ |
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} |
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} |
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} |
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#ifdef OLD |
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} |
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#endif |
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} |
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%}. |
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ok ifFalse:[ |
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" |
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the VM was not able to register the new weakArray |
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This can only happen, if the VM has to resize its tables, |
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and a malloc request failed. Usually, this smells like big |
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trouble being on the way (soon running out of memory in |
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other places as well). |
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Configure your OS for more swap space. |
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" |
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^ RegistrationFailedSignal raiseRequestWith:self |
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] |
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! ! |
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!WeakArray methodsFor:'accessing'! |
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at:index |
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"return the indexed instance variable with index, anInteger. |
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Reimplemented here for IGC readBarrier. You dont have to understand this." |
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^ self basicAt:index |
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! |
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basicAt:index |
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"return the indexed instance variable with index, anInteger. |
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Reimplemented here for IGC readBarrier. You dont have to understand this." |
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%{ /* NOCONTEXT */ |
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REGISTER int indx; |
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REGISTER unsigned int nIndex; |
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OBJ el; |
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extern OBJ __WEAK_READ__(); |
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if (__isSmallInteger(index)) { |
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indx = _intVal(index) - 1; |
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if (indx >= 0) { |
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nIndex = __BYTES2OBJS__(__qSize(self) - OHDR_SIZE); |
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indx += _intVal(_ClassInstPtr(__qClass(self))->c_ninstvars); |
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if (indx < nIndex) { |
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el = _InstPtr(self)->i_instvars[indx]; |
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el = __WEAK_READ__(self, el); |
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RETURN (el ); |
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} |
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} |
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} |
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%}. |
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^ super basicAt:index |
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! |
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dependents |
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"return the dependents of the receiver" |
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^ dependents |
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! |
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dependents:aCollection |
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"set the dependents of the receiver" |
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dependents := aCollection |
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! |
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watcher |
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"return the watcher of the receiver. |
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The watcher-stuff is a leftover from an old implementation |
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and will vanish soon" |
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^ watcher |
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! |
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watcher:anObject |
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"set the watcher of the receiver. |
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The watcher-stuff is a leftover from an old implementation |
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and will vanish soon" |
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watcher := anObject |
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! ! |
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!WeakArray methodsFor:'copying'! |
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274 |
postCopy |
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"copying alone does not really help - we have to tell |
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the VM, that there is a new WeakArray around ... |
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Q: who copies weakArrays ?" |
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290 | 279 |
dependents := nil. |
159 | 280 |
self registerAsWeakArray. |
281 |
! ! |
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!WeakArray methodsFor:'enumeration'! |
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do:aBlock |
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"evaluate the argument, aBlock for each element in the collection. |
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- reimplemented for IGC readBarrier. You dont have to understand this." |
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|home| |
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%{ |
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REGISTER OBJFUNC codeVal; |
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REGISTER int index; |
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unsigned int nIndex; |
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extern OBJ Block; |
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static struct inlineCache val = _ILC1; |
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REGISTER OBJ rHome; |
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OBJ el; |
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extern OBJ __WEAK_READ__(); |
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index = _intVal(_ClassInstPtr(__qClass(self))->c_ninstvars); |
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nIndex = __BYTES2OBJS__(__qSize(self) - OHDR_SIZE); |
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if (__isBlockLike(aBlock) |
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&& ((codeVal = _BlockInstPtr(aBlock)->b_code) != (OBJFUNC)nil) |
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&& (_BlockInstPtr(aBlock)->b_nargs == __MKSMALLINT(1))) { |
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#ifdef NEW_BLOCK_CALL |
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for (; index < nIndex; index++) { |
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if (InterruptPending != nil) __interruptL(@line COMMA_CON); |
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el = _InstPtr(self)->i_instvars[index]; |
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el = __WEAK_READ__(self, el); |
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(*codeVal)(aBlock, CON_COMMA el); |
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} |
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#else |
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home = _BlockInstPtr(aBlock)->b_home; |
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rHome = home; |
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if ((rHome == nil) || (__qSpace(rHome) >= STACKSPACE)) { |
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/* |
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* home will not move - keep in a fast register |
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*/ |
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for (; index < nIndex; index++) { |
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if (InterruptPending != nil) __interruptL(@line COMMA_CON); |
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|
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el = _InstPtr(self)->i_instvars[index]; |
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el = __WEAK_READ__(self, el); |
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(*codeVal)(rHome, CON_COMMA el); |
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} |
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} else { |
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for (; index < nIndex; index++) { |
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if (InterruptPending != nil) __interruptL(@line COMMA_CON); |
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|
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el = _InstPtr(self)->i_instvars[index]; |
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el = __WEAK_READ__(self, el); |
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332 |
(*codeVal)(home, CON_COMMA el); |
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333 |
} |
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} |
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335 |
#endif |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
336 |
} else { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
337 |
for (; index < nIndex; index++) { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
338 |
if (InterruptPending != nil) __interruptL(@line COMMA_CON); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
339 |
|
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
340 |
el = _InstPtr(self)->i_instvars[index]; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
341 |
el = __WEAK_READ__(self, el); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
342 |
(*val.ilc_func)(aBlock, |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
343 |
@symbol(value:), |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
344 |
CON_COMMA nil, &val, |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
345 |
el); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
346 |
} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
347 |
} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
348 |
%} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
349 |
. |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
350 |
^ self |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
351 |
! |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
352 |
|
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
353 |
from:start to:stop do:aBlock |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
354 |
"evaluate the argument, aBlock for the elements starting at index start |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
355 |
up to (and including) stop in the collection. |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
356 |
- reimplemented for IGC readBarrier. You dont have to understand this." |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
357 |
|
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
358 |
|home| |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
359 |
%{ |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
360 |
REGISTER OBJFUNC codeVal; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
361 |
REGISTER int index; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
362 |
REGISTER OBJ rHome; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
363 |
int nIndex, nInsts; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
364 |
extern OBJ Block; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
365 |
static struct inlineCache val = _ILC1; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
366 |
int indexLow, indexHigh; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
367 |
OBJ el; |
604 | 368 |
extern OBJ __WEAK_READ__(); |
586
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
369 |
|
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
370 |
if (__bothSmallInteger(start, stop)) { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
371 |
indexLow = _intVal(start); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
372 |
if (indexLow > 0) { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
373 |
indexHigh = _intVal(stop); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
374 |
nInsts = _intVal(_ClassInstPtr(__qClass(self))->c_ninstvars); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
375 |
indexLow += nInsts; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
376 |
indexHigh += nInsts; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
377 |
nIndex = __BYTES2OBJS__(__qSize(self) - OHDR_SIZE); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
378 |
if (indexHigh <= nIndex) { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
379 |
indexLow--; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
380 |
indexHigh--; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
381 |
if (__isBlockLike(aBlock) |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
382 |
&& ((codeVal = _BlockInstPtr(aBlock)->b_code) != (OBJFUNC)nil) |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
383 |
&& (_BlockInstPtr(aBlock)->b_nargs == __MKSMALLINT(1))) { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
384 |
#ifdef NEW_BLOCK_CALL |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
385 |
for (index=indexLow; index <= indexHigh; index++) { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
386 |
if (InterruptPending != nil) __interruptL(@line COMMA_CON); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
387 |
el = _InstPtr(self)->i_instvars[index]; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
388 |
el = __WEAK_READ__(self, el); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
389 |
(*codeVal)(aBlock, CON_COMMA el); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
390 |
} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
391 |
#else |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
392 |
home = _BlockInstPtr(aBlock)->b_home; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
393 |
rHome = home; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
394 |
if ((rHome == nil) || (__qSpace(rHome) >= STACKSPACE)) { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
395 |
index = indexLow; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
396 |
for (; index <= indexHigh; index++) { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
397 |
if (InterruptPending != nil) __interruptL(@line COMMA_CON); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
398 |
el = _InstPtr(self)->i_instvars[index]; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
399 |
el = __WEAK_READ__(self, el); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
400 |
(*codeVal)(rHome, CON_COMMA el); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
401 |
} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
402 |
} else { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
403 |
for (index=indexLow; index <= indexHigh; index++) { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
404 |
if (InterruptPending != nil) __interruptL(@line COMMA_CON); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
405 |
el = _InstPtr(self)->i_instvars[index]; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
406 |
el = __WEAK_READ__(self, el); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
407 |
(*codeVal)(home, CON_COMMA el); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
408 |
} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
409 |
} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
410 |
#endif |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
411 |
} else { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
412 |
for (index=indexLow; index <= indexHigh; index++) { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
413 |
if (InterruptPending != nil) __interruptL(@line COMMA_CON); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
414 |
el = _InstPtr(self)->i_instvars[index]; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
415 |
el = __WEAK_READ__(self, el); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
416 |
(*val.ilc_func) (aBlock, |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
417 |
@symbol(value:), |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
418 |
CON_COMMA nil, &val, |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
419 |
el); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
420 |
} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
421 |
} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
422 |
} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
423 |
RETURN ( self ); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
424 |
} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
425 |
} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
426 |
%} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
427 |
. |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
428 |
^ super from:start to:stop do:aBlock |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
429 |
! |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
430 |
|
603 | 431 |
keysAndValuesDo:aBlock |
432 |
"evaluate the argument, aBlock for each element in the collection. |
|
433 |
Pass both index and element to the block. |
|
434 |
- reimplemented for speed" |
|
435 |
||
436 |
|home| |
|
437 |
%{ |
|
438 |
REGISTER OBJFUNC codeVal; |
|
439 |
REGISTER int index; |
|
440 |
unsigned int nIndex; |
|
441 |
extern OBJ Block; |
|
442 |
static struct inlineCache val2 = _ILC2; |
|
443 |
REGISTER OBJ rHome; |
|
444 |
OBJ el; |
|
604 | 445 |
extern OBJ __WEAK_READ__(); |
603 | 446 |
|
447 |
index = _intVal(_ClassInstPtr(__qClass(self))->c_ninstvars); |
|
448 |
nIndex = __BYTES2OBJS__(__qSize(self) - OHDR_SIZE); |
|
449 |
if (__isBlockLike(aBlock) |
|
450 |
&& ((codeVal = _BlockInstPtr(aBlock)->b_code) != (OBJFUNC)nil) |
|
451 |
&& (_BlockInstPtr(aBlock)->b_nargs == __MKSMALLINT(2))) { |
|
452 |
#ifdef NEW_BLOCK_CALL |
|
453 |
for (; index < nIndex; index++) { |
|
454 |
if (InterruptPending != nil) __interruptL(@line COMMA_CON); |
|
455 |
||
456 |
el = _InstPtr(self)->i_instvars[index]; |
|
457 |
el = __WEAK_READ__(self, el); |
|
458 |
(*codeVal)(aBlock, CON_COMMA __MKSMALLINT(index+1), el); |
|
459 |
} |
|
460 |
#else |
|
461 |
home = _BlockInstPtr(aBlock)->b_home; |
|
462 |
rHome = home; |
|
463 |
if ((rHome == nil) || (__qSpace(rHome) >= STACKSPACE)) { |
|
464 |
/* |
|
465 |
* home will not move - keep in a fast register |
|
466 |
*/ |
|
467 |
while (index < nIndex) { |
|
468 |
if (InterruptPending != nil) __interruptL(@line COMMA_CON); |
|
469 |
||
470 |
el = _InstPtr(self)->i_instvars[index]; |
|
471 |
el = __WEAK_READ__(self, el); |
|
472 |
index++; |
|
473 |
(*codeVal)(rHome, CON_COMMA __MKSMALLINT(index), el); |
|
474 |
} |
|
475 |
} else { |
|
476 |
while (index < nIndex) { |
|
477 |
if (InterruptPending != nil) __interruptL(@line COMMA_CON); |
|
478 |
||
479 |
el = _InstPtr(self)->i_instvars[index]; |
|
480 |
el = __WEAK_READ__(self, el); |
|
481 |
index++; |
|
482 |
(*codeVal)(home, CON_COMMA __MKSMALLINT(index), el); |
|
483 |
} |
|
484 |
} |
|
485 |
#endif |
|
486 |
} else { |
|
487 |
while (index < nIndex) { |
|
488 |
if (InterruptPending != nil) __interruptL(@line COMMA_CON); |
|
489 |
||
490 |
el = _InstPtr(self)->i_instvars[index]; |
|
491 |
el = __WEAK_READ__(self, el); |
|
492 |
index++; |
|
493 |
(*val2.ilc_func)(aBlock, |
|
494 |
@symbol(value:value:), |
|
495 |
CON_COMMA nil, &val2, |
|
496 |
__MKSMALLINT(index), |
|
497 |
el); |
|
498 |
} |
|
499 |
} |
|
500 |
%}. |
|
501 |
^ self |
|
502 |
! |
|
503 |
||
586
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
504 |
nonNilElementsDo:aBlock |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
505 |
"evaluate the argument, aBlock for each non-nil element" |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
506 |
|
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
507 |
|home| |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
508 |
%{ |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
509 |
REGISTER OBJFUNC codeVal; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
510 |
REGISTER int index; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
511 |
int nIndex; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
512 |
extern OBJ Block; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
513 |
static struct inlineCache val = _ILC1; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
514 |
REGISTER OBJ rHome; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
515 |
REGISTER OBJ element; |
604 | 516 |
extern OBJ __WEAK_READ__(); |
586
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
517 |
|
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
518 |
index = _intVal(_ClassInstPtr(__qClass(self))->c_ninstvars); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
519 |
nIndex = __BYTES2OBJS__(__qSize(self) - OHDR_SIZE); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
520 |
if (__isBlockLike(aBlock) |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
521 |
&& ((codeVal = _BlockInstPtr(aBlock)->b_code) != (OBJFUNC)nil) |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
522 |
&& (_BlockInstPtr(aBlock)->b_nargs == __MKSMALLINT(1))) { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
523 |
#ifdef NEW_BLOCK_CALL |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
524 |
for (; index < nIndex; index++) { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
525 |
if (InterruptPending != nil) __interruptL(CONARG); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
526 |
|
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
527 |
element = _InstPtr(self)->i_instvars[index]; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
528 |
if (element != nil) { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
529 |
element = __WEAK_READ__(self, element); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
530 |
if (element != nil) { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
531 |
(*codeVal)(aBlock, CON_COMMA element); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
532 |
} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
533 |
} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
534 |
} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
535 |
#else |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
536 |
home = _BlockInstPtr(aBlock)->b_home; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
537 |
rHome = home; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
538 |
if ((rHome == nil) || (__qSpace(rHome) >= STACKSPACE)) { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
539 |
/* |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
540 |
* home will not move - keep in in a register |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
541 |
*/ |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
542 |
for (; index < nIndex; index++) { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
543 |
if (InterruptPending != nil) __interruptL(CONARG); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
544 |
|
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
545 |
element = _InstPtr(self)->i_instvars[index]; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
546 |
if (element != nil) { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
547 |
element = __WEAK_READ__(self, element); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
548 |
if (element != nil) { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
549 |
(*codeVal)(rHome, CON_COMMA element); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
550 |
} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
551 |
} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
552 |
} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
553 |
} else { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
554 |
for (; index < nIndex; index++) { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
555 |
if (InterruptPending != nil) __interruptL(@line CONARG); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
556 |
|
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
557 |
element = _InstPtr(self)->i_instvars[index]; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
558 |
if (element != nil) { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
559 |
element = __WEAK_READ__(self, element); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
560 |
if (element != nil) { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
561 |
(*codeVal)(home, CON_COMMA element); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
562 |
} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
563 |
} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
564 |
} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
565 |
} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
566 |
#endif |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
567 |
} else { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
568 |
for (; index < nIndex; index++) { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
569 |
if (InterruptPending != nil) __interruptL(@line CONARG); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
570 |
|
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
571 |
element = _InstPtr(self)->i_instvars[index]; |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
572 |
if (element != nil) { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
573 |
element = __WEAK_READ__(self, element); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
574 |
if (element != nil) { |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
575 |
(*val.ilc_func)(aBlock, |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
576 |
@symbol(value:), |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
577 |
CON_COMMA nil, &val, |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
578 |
element); |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
579 |
} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
580 |
} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
581 |
} |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
582 |
} |
604 | 583 |
%}. |
586
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
584 |
^ self |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
585 |
! ! |
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
586 |
|
603 | 587 |
!WeakArray methodsFor:'notification'! |
586
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
588 |
|
603 | 589 |
lostPointer |
590 |
"I lost a pointer; tell watcher and dependents. |
|
591 |
This is sent from the finalization in ObjectMemory." |
|
586
cab695f942a6
weakArray readBarrier for IGC
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
592 |
|
603 | 593 |
dependents notNil ifTrue:[ |
594 |
self changed. |
|
595 |
]. |
|
596 |
watcher notNil ifTrue:[ |
|
597 |
watcher informDispose |
|
598 |
] |
|
599 |
! ! |
|
6 | 600 |
|
628 | 601 |
!WeakArray class methodsFor:'documentation'! |
602 |
||
603 |
version |
|
604 |
^ '$Header: /cvs/stx/stx/libbasic/WeakArray.st,v 1.21 1995-11-23 17:00:32 cg Exp $' |
|
605 |
! ! |
|
603 | 606 |
WeakArray initialize! |