" COPYRIGHT (c) 1988 by Claus Gittinger All Rights Reserved This software is furnished under a license and may be used only in accordance with the terms of that license and with the inclusion of the above copyright notice. This software may not be provided or otherwise made available to, or used by, any other person. No title to or ownership of the software is hereby transferred. " "{ Package: 'stx:libbasic' }" nil subclass:#Object instanceVariableNames:'' classVariableNames:'ErrorSignal HaltSignal MessageNotUnderstoodSignal UserInterruptSignal RecursionInterruptSignal SubscriptOutOfBoundsSignal IndexNotFoundSignal NonIntegerIndexSignal NotFoundSignal KeyNotFoundSignal ElementOutOfBoundsSignal UserNotificationSignal InformationSignal WarningSignal PrimitiveFailureSignal DeepCopyErrorSignal AbortSignal ErrorRecursion Dependencies InfoPrinting ActivityNotificationSignal InternalErrorSignal NonWeakDependencies SynchronizationSemaphores ObjectAttributes OSSignalInterruptSignal FinalizationLobby RecursiveStoreStringSignal AbortAllSignal EnabledBreakPoints' poolDictionaries:'' category:'Kernel-Objects' ! !Object class methodsFor:'documentation'! copyright " COPYRIGHT (c) 1988 by Claus Gittinger All Rights Reserved This software is furnished under a license and may be used only in accordance with the terms of that license and with the inclusion of the above copyright notice. This software may not be provided or otherwise made available to, or used by, any other person. No title to or ownership of the software is hereby transferred. " ! dependencies " ST/X dependencies are slightly modified from ST-80's (we think they are better ;-). One problem occuring very often in ST-80 is that some object cannot be garbage collected because some dependency is present, having the object as a dependent of some other object. In ST-80, this association remains alive (because a Dictionary is used to hold dependents) - even if no other references exist to to dependent or the dependee. This means, that in ST-80, a #release is mandatory in order to prevent memory leaks. We think, that this is a bad solution, since after all, exactly that kind of work should be performed by a garbage collector - you should not need to care about dependencies. From a philosophical point of view, why should some object depend on something that the programmer considers a dead object ? (well - worse than that: it seems that some ST-80 code even depends on that behavior) In order to limit the trouble, ST-80 reimplemented the way dependents are stored in the model class - this one keeps the dependents locally, so these dependents go away, once the model is reclaimed. That may make things even more confusing: with models, no #release is needed, with general objects it is mandatory. In ST/X, dependencies are implemented using a WeakDictionary; this means, that once the dependee dies, the dependency association is removed automatically, and the dependent can be reclaimed by the garbage collector, if no other references exist to the dependent. In order to (at least) provide a mechanism for the old behavior (in case your application heavily depends on the ST-80 mechanism), complementary protocol to add nonWeak dependencies is provided (see #addNonWeakDependent / #removeNonWeakDependent). Caveat: since interests are implemented using InterestConverter (which are simply forwarding messages), these must use the nonWeak mechanism (as done in ST-80 automatically). The reason is that there are usually no direct references to the converters, and those would be reclaimed if stored in a weakDictionary. This means, that those interests MUST be removed with #retractInterest (which is bug-compatible to ST-80). We rewrite things to provide a more convenient mechanism in the future ... I like to hear comments on the above - do you think its better ? " ! documentation " Object is the superclass of most other classes. (except for nil-subclasses, which inherit nothing, to catch any message into their #doesNotUnderstand: method) Protocol which is common to every object is defined here. Also some utility stuff (like notify) and error handling is implemented here. Object has no instance variables (and may not get any added). One reason is, that UndefinedObject and SmallInteger are also inheriting from Object - these two cannot have instance variables (due to their implementation). The other reason is that the runtime system (VM) knows about the layout of some built-in classes (think of Class, Method, Block and also Integer or Float). If you were allowed to add instance variables to Object, the VM had to be recompiled (and also rewritten in some places). [Class variables:] ErrorSignal Signal raised for error/error: messages also, parent of all other signals. HaltSignal Signal raised for halt/halt: messages MessageNotUnderstoodSignal Signals raised for various error conditions UserInterruptSignal RecursionInterruptSignal ExceptionInterruptSignal SubscriptOutOfBoundsSignal NonIntegerIndexSignal NotFoundSignal KeyNotFoundSignal ElementOutOfBoundsSignal InformationSignal WarningSignal DeepCopyErrorSignal InternalErrorSignal AbortSignal Signal raised by debugger, to abort a computation BUT, the debugger will only raise it if it is handled. By handling the abortSignal, you can control where the debuggers abort-function resumes execution in case of an error. ErrorRecursion controls behavior when recursive errors occur (i.e. an error while handling an error). Dependencies keeps track of object dependencies. InfoPrinting controls weather informational messages are printed. ActivityNotificationSignal raised on #activityNotification: NonWeakDependencies keeps track of object dependencies. Dependents stay alive. SynchronizationSemaphores Semaphores for per-object-monitor. [author:] Claus Gittinger " ! ! !Object class methodsFor:'initialization'! initSignals "called only once - initialize signals" "/ notice: the class variables here are a leftover from times "/ when errors where signal-instance, not class based. "/ then, signal instances where created here and kept as class vars, "/ to be fetched from the class var or via signal-getter methods. "/ Nowadays, we use class based exceptions, where the exception class "/ is directly referenced. "/ the classvars here are kept for backward compatibility, but they now "/ simply alias the corresponding exception class. "/ Old code should be rewritten to access the error class. ErrorSignal := Error. HaltSignal := HaltInterrupt. MessageNotUnderstoodSignal := MessageNotUnderstood. PrimitiveFailureSignal := PrimitiveFailure. InternalErrorSignal := VMInternalError. UserInterruptSignal := UserInterrupt. RecursionInterruptSignal := RecursionError. NotFoundSignal := NotFoundError. IndexNotFoundSignal := IndexNotFoundError. SubscriptOutOfBoundsSignal := SubscriptOutOfBoundsError. NonIntegerIndexSignal := NonIntegerIndexError. KeyNotFoundSignal := KeyNotFoundError. ElementOutOfBoundsSignal := ElementBoundsError. UserNotificationSignal := UserNotification. WarningSignal := Warning. InformationSignal := UserInformation. ActivityNotificationSignal := ActivityNotification. DeepCopyErrorSignal := DeepCopyError. AbortSignal := AbortOperationRequest. AbortAllSignal := AbortAllOperationRequest. OSSignalInterruptSignal := OSSignalInterrupt. RecursiveStoreStringSignal := RecursiveStoreError. " Object initSignals " "Modified: / 22.1.1998 / 21:23:40 / av" "Modified: / 4.8.1999 / 08:54:06 / stefan" "Modified: / 16.11.2001 / 16:30:08 / cg" ! initialize "called only once - initialize signals" ErrorSignal isNil ifTrue:[ self initSignals. ErrorRecursion := true. ]. ObjectAttributes isNil ifTrue:[ ObjectAttributes := WeakIdentityDictionary new. ]. Dependencies isNil ifTrue:[ Dependencies := WeakDependencyDictionary new. ]. NonWeakDependencies isNil ifTrue:[ NonWeakDependencies := IdentityDictionary new. ]. SynchronizationSemaphores isNil ifTrue:[ SynchronizationSemaphores := WeakIdentityDictionary new. ]. FinalizationLobby isNil ifTrue:[ FinalizationLobby := Registry new. ]. "/ initialize InfoPrinting to the VM's infoPrint setting "/ (which can be turned off via a command line argument) InfoPrinting := ObjectMemory infoPrinting. "Object initialize" "Modified: / 22.1.1998 / 21:23:40 / av" "Modified: / 3.2.1998 / 18:55:09 / cg" "Modified: / 4.8.1999 / 08:54:06 / stefan" ! ! !Object class methodsFor:'Compatibility-ST80'! rootError "return the signal used for error/error: - handling. Same as errorSignal for ST80 compatibility." ^ Error "Created: / 15.1.1998 / 23:47:05 / stefan" ! ! !Object class methodsFor:'Signal constants'! abortAllSignal "return the signal used to abort user actions (much like AbortSignal). This signal is supposed to abort multiple operation actions, and get out of the loop (such as when confirming multiple class deletions etc.)" ^ AbortAllSignal ! abortSignal "return the signal used to abort user actions. This signal is only raised if caught (by the debugger), and will lead way out of the currently active doIt/printIt or inspectIt. (also some others use this for a save abort)" ^ AbortOperationRequest ! activityNotificationSignal "return the signal used for activity notifications. A handler for this signal gets all #activityNotification: sends" ^ ActivityNotification ! ambiguousMessageSignal "return the signal used for ambiguousMessage: - error handling" ^ AmbiguousMessage "Created: / 21-07-2010 / 15:39:18 / Jan Vrany " ! conversionErrorSignal "return the signal used for conversion error handling" ^ ConversionError ! deepCopyErrorSignal "return the signal raised when a deepcopy is asked for an object which cannot do this (for example, BlockClosures or Contexts)." ^ DeepCopyError ! elementOutOfBoundsSignal "return the signal used for element error reporting (this signal is used for example when a value not in 0..255 is to be put into a bytearray)" ^ ElementBoundsError ! errorSignal "return the signal used for error/error: - handling" ^ Error ! haltSignal "return the signal used for halt/halt: - handling" ^ HaltSignal ! indexNotFoundSignal "return the signal used for bad index error reporting. This is also the parentSignal of the nonIntegerIndex- and subscriptOutOfBoundsSignal" ^ IndexNotFoundSignal "Created: / 8.11.1997 / 19:15:48 / cg" ! informationSignal "return the signal used for informations. A handler for this signal gets all #information: sends" ^ InformationSignal ! internalErrorSignal "return the signal used to report internal (VM-) errors." ^ VMInternalError ! keyNotFoundSignal "return the signal used for no such key error reporting" ^ KeyNotFoundError ! messageNotUnderstoodSignal "return the signal used for doesNotUnderstand: - error handling" ^ MessageNotUnderstood ! nonIntegerIndexSignal "return the signal used for bad subscript error reporting" ^ NonIntegerIndexSignal ! notFoundSignal "return the signal used for no element found error reporting" ^ NotFoundSignal ! notifySignal "return the parent of all notification signals." ^ Notification ! osSignalInterruptSignal "return the signal used for OS-signal error reporting; This is only raised if handled - otherwise, a debugger is entered." ^ OSSignalInterrupt "Modified: / 12.6.1998 / 16:27:26 / cg" ! primitiveFailureSignal "return the signal used for primitiveFailed - error handling" ^ PrimitiveFailure ! privateMethodSignal "return the signal used for privateMethod - error handling" ^ MessageNotUnderstoodSignal ! recursionInterruptSignal "return the signal used for recursion overflow error handling" ^ RecursionInterruptSignal ! recursiveStoreStringSignal "return the notification used to report storeString generation of recursive objects" ^ RecursiveStoreError " RecursiveStoreError handle:[:ex | self halt ] do:[ |a| a := Array new:1. a at:1 put:a. a storeOn:Transcript ] " " |a| a := Array new:1. a at:1 put:a. a storeOn:Transcript " ! subclassResponsibilitySignal "return the signal used for subclassResponsibility error reporting. (this signal is used to signal incomplete subclasses - i.e. a programmers error)" ^ SubclassResponsibilityError ! subscriptOutOfBoundsSignal "return the signal used for subscript error reporting. (this signal is used for example when an array is accessed with an index less than 1 or greater than the array size)" ^ SubscriptOutOfBoundsSignal ! userInterruptSignal "return the signal used for ^C interrupts handling" ^ UserInterruptSignal ! userNotificationSignal "the parent signal used with information and warnings. Handling this allows handling of both information- and warning notifications." ^ UserNotificationSignal ! warningSignal "return the signal used for warnings. A handler for this signal gets all #warn: sends" ^ WarningSignal ! ! !Object class methodsFor:'info messages'! infoPrinting "return the flag which controls information messages." ^ InfoPrinting ! infoPrinting:aBoolean "{ Pragma: +optSpace }" "turn on/off printing of information messages. If the argument, aBoolean is false, infoPrint will not output messages. The default is true." InfoPrinting := aBoolean ! ! !Object class methodsFor:'queries'! isAbstract "Return if this class is an abstract class. True is returned for Object here; false for subclasses. Abstract subclasses must redefine again." ^ self == Object ! isBuiltInClass "return true, if this class is known by the run-time-system, i.e. you cannot add/remove instance variables without recompiling the VM. Here, true is returned for myself, false for subclasses." ^ self == Object "Modified: 23.4.1996 / 16:00:07 / cg" ! ! !Object methodsFor:'Compatibility-Dolphin'! stbFixup: anSTBInFiler at: newObjectIndex "Answer the true object that must be used to represent the receiver when read from anSTBInFiler. Typically this is overridden by subclasses of STBProxy to answer the proxied object. Other classes may also override this method to effectively 'one way become' the receiver to some other object" ^ self ! ! !Object methodsFor:'Compatibility-GNU'! display "print the receiver on the standard output stream (which is not the Transcript). Added for GNU-ST compatibility" self print ! displayNl "print the receiver followed by a cr on the standard output stream (which is not the Transcript). Added for GNU-ST compatibility" self printCR ! ! !Object methodsFor:'Compatibility-ST80'! isMetaclass ^ self isMeta ! ! !Object methodsFor:'Compatibility-Squeak'! becomeForward:anotherObject self becomeSameAs:anotherObject ! becomeForward:anotherObject copyHash:copyHash copyHash ifTrue:[ self error:'unsupported operation' ]. self becomeSameAs:anotherObject ! clone ^ self shallowCopy ! copyTwoLevel "one more level than a shallowCopy" ^ self copyToLevel:2 " |original copy elL1 elL2 elL3 copyOfElL1| original := Array new:3. original at:1 put:1234. original at:2 put:'hello'. original at:3 put:(elL1 := Array new:3). elL1 at:1 put:1234. elL1 at:2 put:'hello'. elL1 at:3 put:(elL2 := Array new:3). elL2 at:1 put:1234. elL2 at:2 put:'hello'. elL2 at:3 put:(elL3 := Array new:3). elL3 at:1 put:1234. elL3 at:2 put:'hello'. elL3 at:3 put:(Array new:3). copy := original copyTwoLevel. self assert:((original at:2) ~~ (copy at:2)). self assert:((original at:3) ~~ (copy at:3)). copyOfElL1 := copy at:3. self assert:((elL1 at:2) == (copyOfElL1 at:2)). self assert:((elL1 at:3) == (copyOfElL1 at:3)). " ! explore (self confirm:'The Squeak explorer has not yet been ported to ST/X\\Inspect instead ?' withCRs) ifTrue:[ self inspect ] ! inform: aString "Display a message for the user to read and then dismiss." self information:aString ! isInMemory "All normal objects are." ^ true ! stringForReadout ^ self stringRepresentation ! stringRepresentation "Answer a string that represents the receiver. For most objects this is simply its printString, but for strings themselves, it's themselves. 6/12/96 sw" ^ self printString ! valueWithPossibleArguments:argArray ^ self ! veryDeepCopy ^ self deepCopyUsing:(IdentityDictionary new) ! ! !Object methodsFor:'Compatibility-VW'! isCharacters "added for visual works compatibility" ^ false ! keyNotFoundError:aKey "VW compatibility" self errorKeyNotFound:aKey. ! oneWayBecome:anotherObject ^ self becomeSameAs:anotherObject " |arr o1 o2| arr := Array new:2. arr at:1 put:(o1 := Object new). arr at:2 put:(o2 := Point new). o1 oneWayBecome:o2. (arr at:1) ~~ o2 ifTrue:[self halt]. " " |arr o1 o2| arr := Array new:2. arr at:1 put:(o1 := Object new). arr at:2 put:(o2 := Point new). o1 becomeSameAs:o2. (arr at:1) ~~ o2 ifTrue:[self halt]. " ! ! !Object methodsFor:'accessing'! _at:index "experimental: this is a synthetic selector, generated by the compiler, if a construct of the form expr[idx...] is parsed. I.e. v[n] generates v _at: n " ^ self at:index "Created: / 21-03-2011 / 14:07:57 / cg" ! _at:index put:value "experimental: this is a synthetic selector, generated by the compiler, if a construct of the form expr[idx...] is parsed. I.e. v[n] generates v _at: n " ^ self at:index put:value "Created: / 21-03-2011 / 14:10:12 / cg" ! addSlot: slotName "dynamically add a new slot to the receiver. The receiver must be a real object, not nil or a smallInteger" |classGetter myClass anonCls newObj| myClass := self class. classGetter := ('%__get_',slotName,'__') asSymbol. anonCls := self perform:classGetter ifNotUnderstood:nil. anonCls isNil ifTrue:[ anonCls := myClass subclass:(myClass name,'+',slotName) asSymbol instanceVariableNames:slotName classVariableNames:'' poolDictionaries:'' category:nil inEnvironment:nil. anonCls compile:('%1 ^ %1' bindWith:slotName). anonCls compile:('%1:v %1 := v' bindWith:slotName). Class withoutUpdatingChangesDo:[ |m| m := Compiler compile:('__get_',slotName,' ^ #fooBar' bindWith:slotName) forClass:myClass install:false. m literalAt:(m literals indexOf:#fooBar) put:anonCls. myClass addSelector:classGetter withMethod:m. ]. ]. newObj := anonCls cloneFrom:self. self become:newObj. " |p1 p2 p3| p1 := Point x:10 y:20. p2 := Point x:100 y:200. Transcript show:'p1 is '; showCR:p1. Transcript show:'p2 is '; showCR:p2. p1 addSlot:'z'. p1 z:30. Transcript show:'p1 is '; showCR:p1. Transcript show:'p2 is '; showCR:p2. ObjectMemory dumpObject:p1. ObjectMemory dumpObject:p2. p1 addSlot:'t'. p1 t:30. Transcript show:'p1 is '; showCR:p1. ObjectMemory dumpObject:p1. p3 := Point x:110 y:120. p3 addSlot:'z'. p3 addSlot:'t'. p1 inspect. p2 inspect. p3 inspect. " ! at:index "return the indexed instance variable with index, anInteger; this method can be redefined in subclasses." ^ self basicAt:index ! at:index put:anObject "store the 2nd arg, anObject as indexed instvar with index, anInteger. this method can be redefined in subclasses. Returns anObject (sigh)" ^ self basicAt:index put:anObject "Modified: 19.4.1996 / 11:13:29 / cg" ! basicAt:index "return the indexed instance variable with index, anInteger. Trigger an error if the receiver has no indexed instance variables. This method should NOT be redefined in any subclass (except with great care, for tuning)" %{ /* NOCONTEXT */ REGISTER int nbytes, indx; OBJ myClass; REGISTER char *pFirst; REGISTER int n; /* * notice the missing test for self being a nonNilObject - * this can be done since basicAt: is defined both in UndefinedObject * and SmallInteger */ if (__isSmallInteger(index)) { myClass = __qClass(self); indx = __intVal(index) - 1; n /* nInstVars */ = __intVal(__ClassInstPtr(myClass)->c_ninstvars); n /* nInstBytes */ = OHDR_SIZE + __OBJS2BYTES__(n /* nInstVars */); nbytes = __qSize(self) - n /* nInstBytes */; pFirst = (char *)(__InstPtr(self)) + n /* nInstBytes */; switch ((INT)(__ClassInstPtr(myClass)->c_flags) & __MASKSMALLINT(ARRAYMASK)) { case __MASKSMALLINT(POINTERARRAY): case __MASKSMALLINT(WKPOINTERARRAY): /* * pointers */ if ((unsigned)indx < (__BYTES2OBJS__(nbytes))) { OBJ *op; op = (OBJ *)pFirst + indx; RETURN ( *op ); } break; case __MASKSMALLINT(BYTEARRAY): /* * (unsigned) bytes */ if ((unsigned)indx < nbytes) { unsigned char *cp; cp = (unsigned char *)pFirst + indx; RETURN ( __mkSmallInteger( (*cp & 0xFF)) ); } break; case __MASKSMALLINT(FLOATARRAY): /* * native floats */ if ((unsigned)indx < (nbytes / sizeof(float))) { float *fp; float f; OBJ v; fp = (float *)pFirst + indx; f = *fp; if (f == 0.0) { v = __float0; } else { __qMKSFLOAT(v, f); } RETURN (v); } break; case __MASKSMALLINT(DOUBLEARRAY): /* * native doubles */ #ifdef __NEED_DOUBLE_ALIGN if ((INT)pFirst & (__DOUBLE_ALIGN-1)) { int delta = __DOUBLE_ALIGN - ((INT)pFirst & (__DOUBLE_ALIGN-1)); pFirst += delta; nbytes -= delta; } #endif if ((unsigned)indx < (nbytes / sizeof(double))) { double *dp; double d; OBJ v; dp = (double *)pFirst + indx; d = *dp; if (d == 0.0) { v = __float0; } else { __qMKFLOAT(v, d); } RETURN (v); } break; case __MASKSMALLINT(WORDARRAY): /* * unsigned 16bit ints */ /* Notice: the hard coded shifts are by purpose; * it makes us independent of the short-size of the machine */ if ((unsigned)indx < (nbytes>>1)) { unsigned short *sp; sp = (unsigned short *)(pFirst + (indx<<1)); RETURN ( __mkSmallInteger( (*sp & 0xFFFF)) ); } break; case __MASKSMALLINT(SWORDARRAY): /* * signed 16bit ints */ /* Notice: the hard coded shifts are by purpose; * it makes us independent of the short-size of the machine */ if ((unsigned)indx < (nbytes>>1)) { short *ssp; ssp = (short *)(pFirst + (indx<<1)); RETURN ( __mkSmallInteger( (*ssp) )); } break; case __MASKSMALLINT(LONGARRAY): /* * unsigned 32bit ints */ /* Notice: the hard coded shifts are by purpose; * it makes us independent of the int-size of the machine */ if ((unsigned)indx < (nbytes>>2)) { unsigned int32 ul; unsigned int32 *lp; lp = (unsigned int32 *)(pFirst + (indx<<2)); ul = *lp; #if __POINTER_SIZE__ == 8 { unsigned INT ull = (unsigned INT)ul; RETURN ( __mkSmallInteger(ull) ); } #else if (ul <= _MAX_INT) { RETURN ( __mkSmallInteger(ul) ); } RETURN ( __MKULARGEINT(ul) ); #endif } break; case __MASKSMALLINT(SLONGARRAY): /* * signed 32bit ints */ /* Notice: the hard coded shifts are by purpose; * it makes us independent of the int-size of the machine */ if ((unsigned)indx < (nbytes>>2)) { int32 *slp; int32 l; slp = (int32 *)(pFirst + (indx<<2)); l = *slp; #if __POINTER_SIZE__ == 8 { INT ll = (INT)l; RETURN ( __mkSmallInteger(ll) ); } #else if (__ISVALIDINTEGER(l)) { RETURN ( __mkSmallInteger(l) ); } RETURN ( __MKLARGEINT(l) ); #endif } break; case __MASKSMALLINT(SLONGLONGARRAY): /* * signed 64bit longlongs */ #ifdef __NEED_LONGLONG_ALIGN if ((INT)pFirst & (__LONGLONG_ALIGN-1)) { int delta = __LONGLONG_ALIGN - ((INT)pFirst & (__LONGLONG_ALIGN-1)); pFirst += delta; nbytes -= delta; } #endif /* Notice: the hard coded shifts are by purpose; * it makes us independent of the long/longlong-size of the machine */ if ((unsigned)indx < (nbytes>>3)) { #if __POINTER_SIZE__ == 8 INT *slp, ll; slp = (INT *)(pFirst + (indx<<3)); ll = *slp; if (__ISVALIDINTEGER(ll)) { RETURN ( __mkSmallInteger(ll) ); } RETURN ( __MKLARGEINT(ll) ); #else __int64__ *llp; llp = (__int64__ *)(pFirst + (indx<<3)); RETURN (__MKINT64(llp)); #endif } break; case __MASKSMALLINT(LONGLONGARRAY): /* * unsigned 64bit longlongs */ #ifdef __NEED_LONGLONG_ALIGN if ((INT)pFirst & (__LONGLONG_ALIGN-1)) { int delta = __LONGLONG_ALIGN - ((INT)pFirst & (__LONGLONG_ALIGN-1)); pFirst += delta; nbytes -= delta; } #endif /* Notice: the hard coded shifts are by purpose; * it makes us independent of the long/longlong-size of the machine */ if ((unsigned)indx < (nbytes>>3)) { #if __POINTER_SIZE__ == 8 unsigned INT *ulp, ul; ulp = (unsigned INT *)(pFirst + (indx<<3)); ul = *ulp; if (ul <= _MAX_INT) { RETURN ( __mkSmallInteger(ul) ); } RETURN ( __MKULARGEINT(ul) ); #else __uint64__ *llp; llp = (__uint64__ *)(pFirst + (indx<<3)); RETURN (__MKUINT64(llp)); #endif } break; } } %}. ^ self indexNotIntegerOrOutOfBounds:index ! basicAt:index put:anObject "store the 2nd arg, anObject as indexed instvar with index, anInteger. Returns anObject (sigh). Trigger an error if the receiver has no indexed instance variables. This method should NOT be redefined in any subclass (except with great care, for tuning)" %{ /* NOCONTEXT */ register int nbytes, indx; OBJ myClass; register char *pFirst; /* int nInstBytes, ninstvars, flags; */ REGISTER int n; unsigned int u; int val; /* notice the missing test for self being a nonNilObject - this can be done since basicAt: is defined both in UndefinedObject and SmallInteger */ if (__isSmallInteger(index)) { indx = __intVal(index) - 1; myClass = __qClass(self); n /* ninstvars */ = __intVal(__ClassInstPtr(myClass)->c_ninstvars); n /* nInstBytes */ = OHDR_SIZE + __OBJS2BYTES__(n /* ninstvars */); nbytes = __qSize(self) - n /* nInstBytes */; pFirst = (char *)(__InstPtr(self)) + n /* nInstBytes */; switch ((INT)(__ClassInstPtr(myClass)->c_flags) & __MASKSMALLINT(ARRAYMASK)) { case __MASKSMALLINT(POINTERARRAY): case __MASKSMALLINT(WKPOINTERARRAY): if ((unsigned)indx < (__BYTES2OBJS__(nbytes))) { OBJ *op; op = (OBJ *)pFirst + indx; *op = anObject; __STORE(self, anObject); RETURN ( anObject ); } break; case __MASKSMALLINT(BYTEARRAY): if (__isSmallInteger(anObject)) { val = __intVal(anObject); if ((val & ~0xFF) == 0 /* i.e. (val >= 0) && (val <= 255) */) { if ((unsigned)indx < nbytes) { char *cp; cp = pFirst + indx; *cp = val; RETURN ( anObject ); } } } break; case __MASKSMALLINT(FLOATARRAY): if ((unsigned)indx < (nbytes / sizeof(float))) { float *fp; fp = (float *)pFirst + indx; if (anObject != nil) { if (! __isSmallInteger(anObject)) { if (__qIsFloatLike(anObject)) { *fp = (float)(__floatVal(anObject)); RETURN ( anObject ); } if (__qIsShortFloat(anObject)) { *fp = __shortFloatVal(anObject); RETURN ( anObject ); } } else { *fp = (float) __intVal(anObject); RETURN ( anObject ); } } } break; case __MASKSMALLINT(DOUBLEARRAY): #ifdef __NEED_DOUBLE_ALIGN if ((INT)pFirst & (__DOUBLE_ALIGN-1)) { int delta = __DOUBLE_ALIGN - ((INT)pFirst & (__DOUBLE_ALIGN-1)); pFirst += delta; nbytes -= delta; } #endif if ((unsigned)indx < (nbytes / sizeof(double))) { double *dp; dp = (double *)pFirst + indx; if (anObject != nil) { if (! __isSmallInteger(anObject)) { if (__qIsFloatLike(anObject)) { *dp = __floatVal(anObject); RETURN ( anObject ); } if (__qIsShortFloat(anObject)) { *dp = (double)__shortFloatVal(anObject); RETURN ( anObject ); } } else { *dp = (double) __intVal(anObject); RETURN ( anObject ); } } } break; case __MASKSMALLINT(WORDARRAY): if (__isSmallInteger(anObject)) { val = __intVal(anObject); if ((unsigned)val <= 0xFFFF) { if ((unsigned)indx < (nbytes>>1)) { unsigned short *sp; sp = (unsigned short *)(pFirst + (indx<<1)); *sp = val; RETURN ( anObject ); } } } break; case __MASKSMALLINT(SWORDARRAY): if (__isSmallInteger(anObject)) { val = __intVal(anObject); if ((val >= -32768) && (val < 32768)) { if ((unsigned)indx < (nbytes>>1)) { short *ssp; ssp = (short *)(pFirst + (indx<<1)); *ssp = val; RETURN ( anObject ); } } } break; case __MASKSMALLINT(SLONGARRAY): if ((unsigned)indx < (nbytes>>2)) { int32 *slp; slp = (int32 *)(pFirst + (indx<<2)); if (__isSmallInteger(anObject)) { *slp = __intVal(anObject); RETURN ( anObject ); } n = __signedLongIntVal(anObject); /* * zero means failure for an int larger than INT-size bytes * (would be a smallInteger) */ if (n) { #if __POINTER_SIZE__ == 8 if ((n >= -0x80000000) && (n < 0x80000000)) #endif { *slp = n; RETURN ( anObject ); } } } break; case __MASKSMALLINT(LONGARRAY): if ((unsigned)indx < (nbytes>>2)) { unsigned int32 *lp; lp = (unsigned int32 *)(pFirst + (indx<<2)); if (anObject == __mkSmallInteger(0)) { *lp = 0; RETURN ( anObject ); } u = __longIntVal(anObject); /* * zero means failure for an int larger than 4 bytes * (would be a smallInteger) */ if (u) { #if __POINTER_SIZE__ == 8 if (u <= 0xFFFFFFFF) #endif { *lp = u; RETURN ( anObject ); } } } break; case __MASKSMALLINT(SLONGLONGARRAY): #ifdef __NEED_LONGLONG_ALIGN if ((INT)pFirst & (__LONGLONG_ALIGN-1)) { int delta = __LONGLONG_ALIGN - ((INT)pFirst & (__LONGLONG_ALIGN-1)); pFirst += delta; nbytes -= delta; } #endif if ((unsigned)indx < (nbytes>>3)) { __int64__ ll; __int64__ *sllp; sllp = (__int64__ *)(pFirst + (indx<<3)); #if __POINTER_SIZE__ == 8 if (__isSmallInteger(anObject)) { *sllp = __intVal(anObject); RETURN ( anObject ); } n = __signedLongIntVal(anObject); if (n) { *sllp = n; RETURN ( anObject ); } #else if (anObject == __mkSmallInteger(0)) { ll.lo = ll.hi = 0; *sllp = ll; RETURN ( anObject ); } if (__signedLong64IntVal(anObject, &ll)) { *sllp = ll; RETURN ( anObject ); } #endif } break; case __MASKSMALLINT(LONGLONGARRAY): #ifdef __NEED_LONGLONG_ALIGN if ((INT)pFirst & (__LONGLONG_ALIGN-1)) { int delta = __LONGLONG_ALIGN - ((INT)pFirst & (__LONGLONG_ALIGN-1)); pFirst += delta; nbytes -= delta; } #endif if ((unsigned)indx < (nbytes>>3)) { __uint64__ ll; __uint64__ *llp; llp = (__uint64__ *)(pFirst + (indx<<3)); #if __POINTER_SIZE__ == 8 if (__isSmallInteger(anObject)) { *llp = __intVal(anObject); RETURN ( anObject ); } ll = __longIntVal(anObject); if (ll) { *llp = ll; RETURN ( anObject ); } #else if (anObject == __mkSmallInteger(0)) { ll.lo = ll.hi = 0; *llp = ll; RETURN ( anObject ); } if (__unsignedLong64IntVal(anObject, &ll)) { *llp = ll; RETURN ( anObject ); } #endif } break; } } %}. index isInteger ifFalse:[ " the index should be an integer number " ^ self indexNotInteger:index ]. (index between:1 and:self size) ifFalse:[ " the index is less than 1 or greater than the size of the receiver collection " ^ self subscriptBoundsError:index ]. (self class isFloatsOrDoubles) ifTrue:[ anObject isNumber ifTrue:[ ^ self basicAt:index put:(anObject asFloat) ] ]. anObject isInteger ifFalse:[ " the object to put into the receiver collection should be an integer number " ^ self elementNotInteger ]. " the object to put into the receiver collection is not an instance of the expected element class, or the value is not within the elements valid range. " ^ self elementBoundsError:anObject "Modified: 19.4.1996 / 11:14:10 / cg" ! byteAt:index "return the byte at index. This is only allowed for non-pointer indexed objects (i.e. byteArrays, wordArrays, floatArrays etc.). The receivers indexed instvars are treated as an uninterpreted collection of bytes. Only useful with binary storage." %{ /* NOCONTEXT */ REGISTER int indx; int nIndex; REGISTER OBJ slf; REGISTER OBJ cls; if (__isSmallInteger(index)) { slf = self; if (__isNonNilObject(slf)) { unsigned char *pFirst; int nIndex; cls = __qClass(slf); pFirst = __byteArrayVal(slf); pFirst += __OBJS2BYTES__(__intVal(__ClassInstPtr(cls)->c_ninstvars)); nIndex = __byteArraySize(slf); indx = __intVal(index) - 1; switch ((INT)(__ClassInstPtr(cls)->c_flags) & __MASKSMALLINT(ARRAYMASK)) { case __MASKSMALLINT(DOUBLEARRAY): #ifdef __NEED_DOUBLE_ALIGN if ((INT)pFirst & (__DOUBLE_ALIGN-1)) { int delta = __DOUBLE_ALIGN - ((INT)pFirst & (__DOUBLE_ALIGN-1)); pFirst += delta; nIndex -= delta; } #endif /* fall into */ case __MASKSMALLINT(BYTEARRAY): case __MASKSMALLINT(WORDARRAY): case __MASKSMALLINT(LONGARRAY): case __MASKSMALLINT(SWORDARRAY): case __MASKSMALLINT(SLONGARRAY): case __MASKSMALLINT(FLOATARRAY): if ((unsigned)indx < (unsigned)nIndex) { RETURN ( __mkSmallInteger( (INT)(pFirst[indx])) ); } break; case __MASKSMALLINT(LONGLONGARRAY): case __MASKSMALLINT(SLONGLONGARRAY): #ifdef __NEED_LONGLONG_ALIGN if ((INT)pFirst & (__LONGLONG_ALIGN-1)) { int delta = __LONGLONG_ALIGN - ((INT)pFirst & (__LONGLONG_ALIGN-1)); pFirst += delta; nIndex -= delta; } #endif if ((unsigned)indx < (unsigned)nIndex) { RETURN ( __mkSmallInteger( (INT)(pFirst[indx])) ); } break; } } } %}. "/ index not integer or index out of range "/ or non-byte indexable receiver ^ self primitiveFailed " Point new byteAt:1 (ByteArray with:1 with:2) byteAt:2 (WordArray with:1) byteAt:1 (FloatArray with:1.0) byteAt:2 'hello' byteAt:1 " ! byteAt:index put:byteValue "set the byte at index. This is only allowed for non-pointer indexed objects (i.e. byteArrays, wordArrays, floatArrays etc.). The receivers indexed instvars are treated as an uninterpreted collection of bytes. Only useful with binary storage." %{ /* NOCONTEXT */ REGISTER int indx; int val, nIndex; REGISTER OBJ slf; REGISTER OBJ cls; if (__bothSmallInteger(index, byteValue)) { val = __intVal(byteValue); if ((unsigned)(val) <= 0xFF /* i.e. (val >= 0) && (val <= 255) */) { slf = self; if (__isNonNilObject(slf)) { cls = __qClass(slf); indx = __intVal(index) - 1; switch ((INT)(__ClassInstPtr(cls)->c_flags) & __MASKSMALLINT(ARRAYMASK)) { case __MASKSMALLINT(BYTEARRAY): case __MASKSMALLINT(WORDARRAY): case __MASKSMALLINT(LONGARRAY): case __MASKSMALLINT(SWORDARRAY): case __MASKSMALLINT(SLONGARRAY): case __MASKSMALLINT(LONGLONGARRAY): case __MASKSMALLINT(SLONGLONGARRAY): case __MASKSMALLINT(FLOATARRAY): case __MASKSMALLINT(DOUBLEARRAY): indx += __OBJS2BYTES__(__intVal(__ClassInstPtr(cls)->c_ninstvars)); nIndex = __byteArraySize(slf); if ((unsigned)indx < (unsigned)nIndex) { __ByteArrayInstPtr(slf)->ba_element[indx] = val; RETURN ( byteValue ); } break; } } } } %}. "/ index not integer or index out of range "/ or non-byte indexable receiver ^ self primitiveFailed " (ByteArray with:1 with:2) byteAt:2 put:3; yourself 'hello' copy byteAt:1 put:105; yourself " ! instVarAt:index "return a non-indexed instance variable; peeking into an object this way is not very object oriented - use with care (needed for copy, inspector etc.)" %{ /* NOCONTEXT */ OBJ myClass; int idx, ninstvars; if (__isSmallInteger(index)) { myClass = __Class(self); idx = __intVal(index) - 1; /* * do not allow returning of non-object fields. * if subclass did not make provisions for that, * we won't do so here ... */ if (((INT)(__ClassInstPtr(myClass)->c_flags) & __MASKSMALLINT(NONOBJECT_INSTS))) { if (idx == 0) { RETURN ( nil ) } } ninstvars = __intVal(__ClassInstPtr(myClass)->c_ninstvars); if ((idx >= 0) && (idx < ninstvars)) { RETURN ( __InstPtr(self)->i_instvars[idx] ); } } %}. ^ self indexNotIntegerOrOutOfBounds:index ! instVarAt:index put:value "change a non-indexed instance variable; peeking into an object this way is not very object oriented - use with care (needed for copy, inspector etc.)" %{ /* NOCONTEXT */ OBJ myClass; int idx, ninstvars; if (__isSmallInteger(index)) { myClass = __Class(self); idx = __intVal(index) - 1; ninstvars = __intVal(__ClassInstPtr(myClass)->c_ninstvars); /* * do not allow setting of non-object fields. * if subclass did not make provisions for that, * we won't do so here ... */ if (((INT)(__ClassInstPtr(myClass)->c_flags) & __MASKSMALLINT(NONOBJECT_INSTS))) { if (idx == 0) { RETURN ( nil ) } } if ((idx >= 0) && (idx < ninstvars)) { __InstPtr(self)->i_instvars[idx] = value; __STORE(self, value); RETURN ( value ); } } %}. ^ self indexNotIntegerOrOutOfBounds:index ! instVarNamed:name "return a non-indexed instance variables value by name; peeking into an object this way is not very object oriented - use with care if at all (provided for inspectors and memory usage monitor). Notice, this access is very slow (because the classes instVar-description has to be parsed ad runtime)" |idx| idx := self class instVarIndexFor:name. idx isNil ifTrue:[ ^ self errorKeyNotFound:name. ]. ^ self instVarAt:idx. " |p| p := Point x:10 y:20. p instVarNamed:'cx' " "Modified: 19.4.1996 / 11:12:39 / cg" ! instVarNamed:name ifAbsent:exceptionBlock "return a non-indexed instance variables value by name, or the value of exceptionBlock, if there is no such instance variable. peeking into an object this way is not very object oriented - use with care if at all (provided for inspectors and memory usage monitor). Notice, this access is very slow (because the classes instVar-description has to be parsed ad runtime)" |idx| idx := self class instVarIndexFor:name. idx isNil ifTrue:[^ exceptionBlock value]. ^ self instVarAt:idx " |p| p := Point x:10 y:20. p instVarNamed:'x' " "Created: 6.7.1996 / 23:02:49 / cg" "Modified: 6.7.1996 / 23:03:41 / cg" ! instVarNamed:name put:value "set a non-indexed instance variable by name; peeking into an object this way is not very object oriented - if at all, use with care (provided for protocol completeness). Notice, this access is very slow (because the classes instVar-description has to be parsed ad runtime)" |idx| idx := self class instVarIndexFor:name. idx isNil ifTrue:[ ^ self errorKeyNotFound:name. ]. ^ self instVarAt:idx put:value. " |p| p := Point x:10 y:20. p instVarNamed:'x' put:30. p " "Modified: 19.4.1996 / 11:12:49 / cg" ! instVarNamed:name put:anObject ifAbsent:exceptionBlock "return a non-indexed instance variables value by name, or the value of exceptionBlock, if there is no such instance variable. peeking into an object this way is not very object oriented - use with care if at all (provided for inspectors and memory usage monitor). Notice, this access is very slow (because the classes instVar-description has to be parsed ad runtime)" |idx| idx := self class instVarIndexFor:name. idx isNil ifTrue:[^ exceptionBlock value]. ^ self instVarAt:idx put:anObject. " |p| p := Point x:10 y:20. p instVarNamed:'x' put:4711 ifAbsent:[self halt:'no such instvar']. p instVarNamed:'bla' put:4712 ifAbsent:[self halt:'no such instvar']. p inspect. " "Created: 6.7.1996 / 23:02:49 / cg" "Modified: 6.7.1996 / 23:03:41 / cg" ! ! !Object methodsFor:'attributes access'! objectAttributeAt:attributeKey "return the attribute for a given key or nil if not found" | attrs | attrs := self objectAttributes. (attrs notNil and:[attrs size > 0]) ifTrue:[ ^ attrs at:attributeKey ifAbsent:[] ]. ^ nil "Created: / 22.1.1998 / 21:29:17 / av" "Modified: / 3.2.1998 / 18:55:55 / cg" ! objectAttributeAt:attributeKey put:anObject "store the attribute anObject referenced by key into the receiver" "/ must do this save from interrupts, since the attributes collection "/ is possibly accessed from multiple threads ... [ | attrs | attrs := self objectAttributes. "/ only need a WeakIdentityDictionary, if there are any non-symbol keys in "/ it. Start with a regular IDDict, and migrate to WeakIDDict if ever required. "/ Typically, this never happens (but does in the UIPainter!!) (attrs isNil or:[attrs size == 0]) ifTrue:[ attributeKey isSymbol ifTrue:[ attrs := IdentityDictionary new. ] ifFalse:[ attrs := WeakIdentityDictionary new. ]. attrs at:attributeKey put:anObject. self objectAttributes:attrs. ] ifFalse:[ attributeKey isSymbol ifFalse:[ attrs class == WeakIdentityDictionary ifFalse:[ attrs := WeakIdentityDictionary new declareAllFrom:attrs. self objectAttributes:attrs. ]. ]. attrs at:attributeKey put:anObject. ]. ] valueUninterruptably "Attaching additional attributes (slots) to an arbitrary object: |p| p := Point new. p objectAttributeAt:#color put:#green. p objectAttributeAt:#color " "Created: / 22.1.1998 / 21:29:25 / av" "Modified: / 3.2.1998 / 18:57:58 / cg" ! objectAttributes "return a Collection of attributes - nil if there is none. The default implementation here uses a global WeakDictionary to store attributes This may be too slow for high frequency slot access, therefore, some classes may redefine this for better performnce. Notice the mentioning of a WeakDictionary - read the classes documentation." ^ ObjectAttributes at:self ifAbsent:[nil] "Created: / 22.1.1998 / 21:29:30 / av" "Modified: / 18.2.2000 / 11:34:16 / cg" ! objectAttributes:aCollection "set the collection of attributes. The default implementation here uses a global Dictionary to store attributes which may be too slow for high frequency change&update. Therefore, some classes may redefine this for better performance." "/ must do this save from interrupts, since the attributes collection "/ is possibly accessed from multiple threads. (OperatingSystem blockInterrupts) ifTrue:[ "/ the common case - already blocked (aCollection isNil or:[aCollection isEmpty]) ifTrue:[ ObjectAttributes removeKey:self ifAbsent:nil ] ifFalse:[ ObjectAttributes at:self put:aCollection ]. ^ self ]. [ (aCollection isNil or:[aCollection isEmpty]) ifTrue:[ ObjectAttributes removeKey:self ifAbsent:nil ] ifFalse:[ ObjectAttributes at:self put:aCollection ]. ] ensure:[ OperatingSystem unblockInterrupts ] "Created: / 22.1.1998 / 21:29:35 / av" "Modified: / 3.2.1998 / 18:58:10 / cg" ! removeObjectAttribute:attributeKey "make the argument, anObject be no attribute of the receiver" "/ must do this save from interrupts, since the attributes collection "/ is possibly accessed from multiple threads. [ |attrs n a| attrs := self objectAttributes. attrs notNil ifTrue:[ attrs size == 0 ifTrue:[ self objectAttributes:nil ] ifFalse:[ attrs removeKey:attributeKey ifAbsent:nil. attrs size == 0 ifTrue:[ self objectAttributes:nil ] ] ] ] valueUninterruptably "Created: / 22.1.1998 / 21:29:39 / av" "Modified: / 18.2.2000 / 11:32:19 / cg" ! ! !Object methodsFor:'change & update'! broadcast:aSelectorSymbol "send a message with selector aSelectorSymbol to all my dependents" self dependentsDo:[:dependent | dependent perform:aSelectorSymbol ] ! broadcast:aSelectorSymbol with:anArgument "send a message with selector aSelectorSymbol with an additional argument anArgument to all my dependents." self dependentsDo:[:dependent | dependent perform:aSelectorSymbol with:anArgument ] ! changeRequest "the receiver wants to change - check if all dependents grant the request, and return true if so" self dependentsDo:[:dependent | dependent updateRequest ifFalse:[^ false]. ]. ^ true ! changeRequest:aSymbol "the receiver wants to change - check if all dependents grant the request, and return true if so" self dependentsDo:[:dependent | (dependent updateRequest:aSymbol) ifFalse:[^ false]. ]. ^ true ! changeRequest:aSymbol from:anObject "the receiver wants to change - check if all dependents except anObject grant the request, and return true if so. The argument anObject is typically going to be the one who is about to send the change request." ^ self changeRequest:aSymbol with:nil from:anObject ! changeRequest:aSymbol with:aParameter "the receiver wants to change - check if all dependents grant the request, and return true if so" ^ self changeRequest:aSymbol with:aParameter from:self ! changeRequest:aSymbol with:aParameter from:anObject "the receiver wants to change - check if all dependents except anObject grant the request, and return true if so. The argument anObject is typically going to be the one who is about to send the change request." self dependentsDo:[:dependent | dependent == anObject ifFalse:[ (dependent updateRequest:aSymbol with:aParameter from:anObject) ifFalse:[^ false]. ] ]. ^ true ! changeRequestFrom:anObject "the receiver wants to change - check if all dependents except anObject grant the request, and return true if so. The argument anObject is typically going to be the one who is about to send the change request." self dependentsDo:[:dependent | dependent == anObject ifFalse:[ (dependent updateRequest) ifFalse:[^ false]. ] ]. ^ true ! changed "notify all dependents that the receiver has changed. Each dependent gets a '#update:'-message with the original receiver as argument." self changed:nil ! changed:aParameter "notify all dependents that the receiver has changed somehow. Each dependent gets a '#update:'-message with aParameter as argument." self changed:aParameter with:nil ! changed:aParameter with:anArgument "notify all dependents that the receiver has changed somehow. Each dependent gets a '#update:with:from:'-message, with aParameter and anArgument as arguments." self dependentsDo:[:dependent | dependent update:aParameter with:anArgument from:self ] ! update:aParameter "the message is sent to a dependent, when one of the objects on whom the receiver depends, has changed. The argument aParameter is either the changed object or the argument to the #changed: message. Default behavior here is to do nothing" ^ self ! update:aParameter with:anArgument "dependent is notified of some change - Default is to try update:" ^ self update:aParameter ! update:aParameter with:anArgument from:sender "dependent is notified of some change - Default is to try update:with:" ^ self update:aParameter with:anArgument ! updateRequest "return true, if an update request is granted. Default here is to grant updates - may be used to lock updates if someone is making other changes from within an update. Or if someone has locked its state and does not want others to change things. However, these dependents must all honor the changeRequest - ifTrue - change protocol. I.e. they must first ask all others via changeRequest, and only do the change it returns true. The others must decide in updateRequest and return true if they think a change is ok." ^ true ! updateRequest:aSymbol "return true, if an update request is granted. Default here a simple updateRequest" ^ self updateRequest ! updateRequest:aSymbol with:aParameter "return true, if an update request is granted. Default here a simple updateRequest" ^ self updateRequest:aSymbol ! updateRequest:aSymbol with:aParameter from:sender "return true, if an update request is granted. Default here a simple updateRequest" ^ self updateRequest:aSymbol with:aParameter ! withoutUpdating:someone do:aBlock "evaluate a block but remove someone from my dependents temporarily" (self dependents includesIdentical:someone) ifFalse:[ ^ aBlock value. ]. self removeDependent:someone. ^ aBlock ensure:[ self addDependent:someone ] ! ! !Object methodsFor:'comparing'! = anObject "return true, if the receiver and the arg have the same structure. Notice: This method is partially open coded (inlined) by the compiler(s) identical objects are always considered equal. redefining it may not work as expected." ^ self == anObject ! == anObject "return true, if the receiver and the arg are the same object. Never redefine this in any class. Notice: This method is open coded (inlined) by the compiler(s) - redefining it may not work as expected." %{ /* NOCONTEXT */ RETURN ( (self == anObject) ? true : false ); %} ! deepSameContentsAs:anObject "return true, if the receiver and the arg have the same contents in both the named instance vars and any indexed instVars. This method descends into referenced objects, where #sameContentsAs: does not descend" |myClass val sz "{ Class: SmallInteger }" | myClass := self class. myClass isVariable ifTrue:[ sz := self basicSize. "compare the indexed variables" 1 to:sz do:[:i | val := self basicAt:i. val isLiteral ifTrue:[ val = (anObject basicAt:i) ifFalse:[^ false]. ] ifFalse:[ (val deepSameContentsAs:(anObject basicAt:i)) ifFalse:[^ false]. ] ] ]. "compare the instance variables" sz := myClass instSize. 1 to:sz do:[:i | val := self instVarAt:i. val isLiteral ifTrue:[ val = (anObject instVarAt:i) ifFalse:[^ false]. ] ifFalse:[ (val deepSameContentsAs:(anObject instVarAt:i)) ifFalse:[^ false]. ] ]. ^ true " #(1 2 3 4) deepSameContentsAs:#[1 2 3 4] asArray (1@2) deepSameContentsAs:(1->2) " ! hash "return an Integer useful as a hash key for the receiver. This hash should return same values for objects with same contents (i.e. use this to hash on structure)" ^ self identityHash ! identityHash "return an Integer useful as a hash key for the receiver. This hash should return same values for the same object (i.e. use this to hash on identity of objects). We cannot use the Objects address (as other smalltalks do) since no object-table exists and the hashval must not change when objects are moved by the collector. Therefore we assign each object a unique Id in the object header itself as its hashed upon. (luckily we have 11 bits spare to do this - unluckily its only 11 bits). Time will show, if 11 bits are enough; if not, another entry in the object header will be needed, adding 4 bytes to every object. Alternatively, hashed-upon objects could add an instvar containing the hash value." %{ /* NOCONTEXT */ REGISTER unsigned INT hash; static unsigned nextHash = 0; if (__isNonNilObject(self)) { hash = __GET_HASH(self); if (hash == 0) { /* has no hash yet */ if (++nextHash > __MAX_HASH__) { nextHash = 1; } hash = nextHash; __SET_HASH(self, hash); } /* * now, we got 11 bits for hashing; * make it as large as possible; since most hashers use the returned * key and take it modulo some prime number, this will allow for * better distribution (i.e. bigger empty spaces) in hashed collection. */ hash = __MAKE_HASH__(hash); RETURN ( __mkSmallInteger(hash) ); } %}. ^ 0 "never reached, since redefined in UndefinedObject and SmallInteger" ! identityHashForBinaryStore "hash which is usable if the object does not change its class and does not #become something else, while the hash is used. This is only used by the binary storage mechanism, during the object writing phase." %{ /* NOCONTEXT */ REGISTER unsigned INT hash, hash1, hash2, sz; OBJ o; static unsigned INT nextHash = 0; static unsigned INT nextClassHash = 0; if (__isNonNilObject(self)) { /* * my own identityHash */ hash1 = __GET_HASH(self); if (hash1 == 0) { /* has no hash yet */ if (++nextHash > __MAX_HASH__) { nextHash = 1; } hash1 = nextHash; __SET_HASH(self, hash1); } /* * my classes identityHash */ o = __qClass(self); hash2 = __GET_HASH(o); if (hash2 == 0) { /* has no hash yet */ if (++nextClassHash > __MAX_HASH__) { nextClassHash = 1; } hash2 = nextClassHash; __SET_HASH(o, hash2); } /* * some bits of my size */ sz = __qSize(self); /* * now, we got 11 + 11 + 8 bits for hashing; * make it as large as possible; since most hashers use the returned * key and take it modulo some prime number, this will allow for * better distribution (i.e. bigger empty spaces) in hashed collection. */ hash = (hash1 << 11) | hash2; /* 22 bits */ hash = (hash << 8) | (sz & 0xFC); /* 30 bits */ while ((hash & 0x20000000) == 0) { hash <<= 1; } RETURN ( __mkSmallInteger(hash) ); } %}. "never reached, since UndefinedObject and SmallInteger are not hashed upon in binary storage" ^ self identityHash ! sameContentsAs:anObject "return true, if the receiver and the arg have the same contents in both the named instance vars and any indexed instVars. The code here only checks if values present in the receiver are also present in the arg, not vice versa. I.e. the argument may be bigger and/or have more instance variables." |myClass sz "{ Class: SmallInteger }" | myClass := self class. myClass isVariable ifTrue:[ sz := self basicSize. anObject basicSize >= sz ifFalse:[^ false]. "compare the indexed variables" 1 to:sz do:[:i | (self basicAt:i) == (anObject basicAt:i) ifFalse:[^ false]. ] ]. "compare the instance variables" sz := myClass instSize. anObject class instSize >= sz ifFalse:[^ false]. 1 to:sz do:[:i | (self instVarAt:i) == (anObject instVarAt:i) ifFalse:[^ false]. ]. ^ true " #(1 2 3 4) sameContentsAs:#[1 2 3 4] asArray (1@2) sameContentsAs:(1->2) " "Created: / 21-04-1998 / 15:56:40 / cg" "Modified: / 05-08-2010 / 16:44:09 / sr" ! ~= anObject "return true, if the receiver and the arg do not have the same structure. Notice: This method is partially open coded (inlined) by the compiler(s) identical objects are never considered unequal. redefining it may not work as expected." ^ (self = anObject) not ! ~~ anObject "return true, if the receiver and the arg are not the same object. Never redefine this in any class. Notice: This method is open coded (inlined) by the compiler(s) - redefining it may not work as expected." %{ /* NOCONTEXT */ RETURN ( (self == anObject) ? false : true ); %} ! ! !Object methodsFor:'converting'! -> anObject "return an association with the receiver as key and the argument as value" ^ Association key:self value:anObject ! as:aSimilarClass "If the receivers class is not aSimilarClass, create and return an object of class aSimilarClass that has the same contents as the receiver. Otherwise, return the receiver." self class == aSimilarClass ifTrue:[^ self]. ^ aSimilarClass newFrom:self " #[1 2 3 4] as:ByteArray #[1 2 3 4] as:Array #[81 82 83 84] as:String #[81 82 83 84] as:Symbol " ! asCollection "return myself as a Collection. Redefined in collection to return themself." ^ Array with:self ! asSequenceableCollection "return myself as a SequenceableCollection. Redefined in SequenceableCollection" ^ Array with:self ! asString ^ self printString ! asValue "return a valueHolder for for the receiver" ^ ValueHolder with:self ! ! !Object methodsFor:'copying'! cloneFrom:anObject "Helper for copy: copy all instance variables from anObject into the receiver, which should be of the same class as the argument." self cloneFrom:anObject performing:#yourself " |x| x := Array new:3. x cloneFrom:#(1 2 3). " ! cloneFrom:anObject performing:aSymbol "Helper for copy: for each instance variable from anObject, send it aSymbol and store the result into the receiver, which should be of the same class as the argument." |myClass sz "{ Class: SmallInteger }" t | myClass := self class. "process the named instance variables" sz := myClass instSize. 1 to:sz do:[:i | t := anObject instVarAt:i. aSymbol ~~ #yourself ifTrue:[ t := t perform:aSymbol ]. self instVarAt:i put:t ]. myClass isVariable ifTrue:[ sz := self basicSize. "process the indexed instance variables" 1 to:sz do:[:i | t := anObject basicAt:i. aSymbol ~~ #yourself ifTrue:[ t := t perform:aSymbol. ]. self basicAt:i put:t. ] ]. ! cloneInstanceVariablesFrom:aPrototype "Shallow copy variables from a prototype into myself. This copies instVars by name - i.e. same-named variables are copied, others are not. The variable slots are copied as available (i.e. the min of both indexed sizes is used)." |myClass prototypesClass myInfo prototypesInfo| myClass := self class. prototypesClass := aPrototype class. (myClass == prototypesClass or:[ myClass isSubclassOf:prototypesClass ]) ifTrue:[ "/ can do better, if my class is a subclass of the prototype's class 1 to: prototypesClass instSize do:[:index | self instVarAt:index put:(aPrototype instVarAt:index) ] ] ifFalse:[ "/ map instvars by name myInfo := myClass instanceVariableOffsets. prototypesInfo := prototypesClass instanceVariableOffsets. myInfo keysAndValuesDo:[:name :index | |varIndexAssoc| varIndexAssoc := prototypesInfo at:name ifAbsent:[]. varIndexAssoc notNil ifTrue:[ self instVarAt:index put:(aPrototype instVarAt:(varIndexAssoc value)) ] ] ]. myClass isVariable ifTrue:[ prototypesClass isVariable ifTrue:[ 1 to:(self basicSize min:aPrototype basicSize) do:[:index | self basicAt:index put:(aPrototype basicAt:index) ]. ]. ]. " Class withoutUpdatingChangesDo:[ |point3D| point3D := Point subclass:#Point3D instanceVariableNames:'z' classVariableNames:'' poolDictionaries:'' category:'testing' inEnvironment:nil. (point3D new cloneInstanceVariablesFrom:1@2) inspect. ] " " Class withoutUpdatingChangesDo:[ Point variableSubclass:#Point3D_test instanceVariableNames:'z' classVariableNames:'' poolDictionaries:'' category:'testing'. (((Smalltalk at:#Point3D_test) new:2) cloneInstanceVariablesFrom:#(1 2 3)) inspect. ] " " |someObject| Class withoutUpdatingChangesDo:[ Object subclass:#TestClass1 instanceVariableNames:'foo bar' classVariableNames:'' poolDictionaries:'' category:'testing'. someObject := TestClass1 new. someObject instVarAt:1 put:'foo'; instVarAt:2 put:'bar'. Object subclass:#TestClass2 instanceVariableNames:'bar foo' classVariableNames:'' poolDictionaries:'' category:'testing'. (TestClass2 new cloneInstanceVariablesFrom:someObject) inspect. ] " " |top b b1| top := StandardSystemView new. top extent:100@100. b := Button in:top. b label:'hello'. b1 := ArrowButton new cloneInstanceVariablesFrom:b. top open. b1 inspect " ! copy "return a copy of the receiver - defaults to shallowcopy here. Notice, that copy does not copy dependents." ^ self shallowCopy postCopy ! copyToLevel:level "a controlled deepCopy, where the number of levels can be specified. Notice: This method DOES NOT handle cycles/self-refs and does NOT preserve object identity; i.e. identical references in the source are copied multiple times into the copy." |newObject newLevel class sz "{Class: SmallInteger}" newInst| newObject := self copy. newObject == self ifTrue: [^ self]. "copy of nil, true, false, ... is self" level == 1 ifTrue:[^ newObject]. newLevel := level - 1. class := newObject class. "process the named instance variables" sz := class instSize. 1 to:sz do:[:i | newInst := newObject instVarAt:i. newInst notNil ifTrue:[ newObject instVarAt:i put:(newInst copyToLevel:newLevel). ]. ]. class isVariable ifTrue:[ sz := newObject basicSize. "process the indexed instance variables" 1 to:sz do:[:i | newInst := newObject basicAt:i. newInst notNil ifTrue:[ newObject basicAt:i put:(newInst copyToLevel:newLevel). ]. ] ]. ^ newObject " |a b| a := #( '1.1' '1.2' '1.3' ( '1.41' '1.42' '1.43' ( '1.441' '1.442' '1.443' ( '1.4441' '1.4442' '1.4443' ) '1.445' ) '1.45' ) '1.5' ). b := a copyToLevel:1. self assert: ( (a at:1) == (b at:1) ). self assert: ( (a at:4) == (b at:4) ). b := a copyToLevel:2. self assert: ( (a at:1) ~~ (b at:1) ). self assert: ( (a at:4) ~~ (b at:4) ). self assert: ( ((a at:4) at:1) == ((b at:4) at:1) ). self assert: ( ((a at:4) at:4) == ((b at:4) at:4) ). b := a copyToLevel:3. self assert: ( (a at:1) ~~ (b at:1) ). self assert: ( (a at:4) ~~ (b at:4) ). self assert: ( ((a at:4) at:1) ~~ ((b at:4) at:1) ). self assert: ( ((a at:4) at:4) ~~ ((b at:4) at:4) ). self assert: ( (((a at:4) at:4) at:1) == (((b at:4) at:4)at:1) ). self assert: ( (((a at:4) at:4) at:4) == (((b at:4) at:4)at:4) ). " ! deepCopy "return a copy of the object with all subobjects also copied. This method DOES handle cycles/self-refs and preserves object identity; however the receivers class is not copied (to avoid the 'total' copy). This deepCopy is a bit slower than the old (unsecure) one, since it keeps track of already copied objects. If you are sure, that your copied object does not include duplicates (or you do not care) and no cycles are involved, you can use the old simpleDeepCopy, which avoids this overhead (but may run into trouble). Notice, that deepCopy does not copy dependents." ^ self deepCopyUsing:(IdentityDictionary new) "an example which is not handled by the old deepCopy: |a| a := Array new:3. a at:3 put:a. a deepCopy inspect " " |a| a := Color black onDevice:Screen current. a deepCopy inspect " "Modified: 27.3.1996 / 16:31:20 / stefan" ! deepCopyError "{ Pragma: +optSpace }" "raise a signal, that deepCopy is not allowed for this object" ^ DeepCopyError raise ! deepCopyUsing:aDictionary "a helper for deepCopy; return a copy of the object with all subobjects also copied. If the to-be-copied object is in the dictionary, use the value found there. The class of the receiver is not copied. This method DOES handle cycles/self references." ^ self deepCopyUsing:aDictionary postCopySelector:#postDeepCopyFrom:. " |a b c copyOfC| a := Array with:'hello' with:'world' with:nil. b := 99 @ 999. a at:3 put:b. c := Array with:a with:b with:a. Transcript showCR: (c at:1) == (c at:3). copyOfC := c deepCopy. Transcript showCR: (copyOfC at:1) == (copyOfC at:3) " ! deepCopyUsing:aDictionary postCopySelector:postCopySelector "a helper for deepCopy; return a copy of the object with all subobjects also copied. If the to-be-copied object is in the dictionary, use the value found there. The class of the receiver is not copied. This method DOES handle cycles/self references." |myClass aCopy basicSize "{ Class: SmallInteger }" instSize "{ Class: SmallInteger }" iOrig iCopy| myClass := self class. myClass isVariable ifTrue:[ basicSize := self basicSize. aCopy := myClass basicNew:basicSize. ] ifFalse:[ basicSize := 0. aCopy := myClass basicNew ]. aCopy setHashFrom:self. aDictionary at:self put:aCopy. " copy the instance variables " instSize := myClass instSize. 1 to:instSize do:[:i | (self skipInstvarIndexInDeepCopy:i) ifFalse:[ iOrig := self instVarAt:i. iOrig notNil ifTrue:[ iCopy := aDictionary at:iOrig ifAbsent:nil. iCopy isNil ifTrue:[ iCopy := iOrig deepCopyUsing:aDictionary postCopySelector:postCopySelector ]. aCopy instVarAt:i put:iCopy ] ] ]. " copy indexed instvars - if any " basicSize ~~ 0 ifTrue:[ myClass isBits ifTrue:[ "block-copy indexed instvars" aCopy replaceFrom:1 to:basicSize with:self startingAt:1 ] ifFalse:[ "individual deep copy the indexed variables" 1 to:basicSize do:[:i | iOrig := self basicAt:i. iOrig notNil ifTrue:[ "/ used to be dict-includesKey-ifTrue[dict-at:], "/ changed to use dict-at:ifAbsent:, to avoid double lookup in dictionary iCopy := aDictionary at:iOrig ifAbsent:nil. iCopy isNil ifTrue:[ iCopy := iOrig deepCopyUsing:aDictionary postCopySelector:postCopySelector ]. aCopy basicAt:i put:iCopy ] ] ] ]. aCopy perform:postCopySelector withOptionalArgument:self and:aDictionary. ^ aCopy "Modified: / 21-07-2011 / 13:30:52 / cg" ! postCopy "this is for compatibility with ST-80 code, which uses postCopy for cleanup after copying, while ST/X passes the original in postCopyFrom: (see there)" ^ self ! postDeepCopy "allows for cleanup after deep copying. To be redefined in subclasses." ! postDeepCopyFrom:aSource "allows for cleanup after deep copying" ^ self postDeepCopy ! setHashFrom:anObject "set my identity-hash key to be the same as anObjects hash key. This is an ST/X speciality, which is NOT available in other (especially OT based) Smalltalks, and may not be available in future ST/X versions. DO NEVER use this for normal application code." %{ /* NOCONTEXT */ REGISTER unsigned h; if (__isNonNilObject(self) && __isNonNilObject(anObject)) { h = __GET_HASH(anObject); __SET_HASH(self, h); RETURN (self); } %}. self primitiveFailed "neither receiver not arg may be nil or SmallInteger" ! shallowCopy "return a copy of the object with shared subobjects (a shallow copy) i.e. the copy shares referenced instvars with its original." %{ /* NOCONTEXT */ int ninsts, spc; int sz; OBJ theCopy; OBJ cls; int flags; cls = __qClass(self); flags = __intVal(__ClassInstPtr(cls)->c_flags); /* * bail out for special objects .. */ if (((flags & ~ARRAYMASK) == 0) && ((flags & ARRAYMASK) != WKPOINTERARRAY)) { sz = __qSize(self); __PROTECT__(self); __qNew(theCopy, sz); /* OBJECT ALLOCATION */ __UNPROTECT__(self); if (theCopy) { cls = __qClass(self); spc = __qSpace(theCopy); theCopy->o_class = cls; __STORE_SPC(theCopy, cls, spc); sz = sz - OHDR_SIZE; if (sz) { char *src, *dst; src = (char *)(__InstPtr(self)->i_instvars); dst = (char *)(__InstPtr(theCopy)->i_instvars); #ifdef bcopy4 { /* care for odd-number of longs */ int nW = sz >> 2; if (sz & 3) { nW++; } bcopy4(src, dst, nW); } #else bcopy(src, dst, sz); #endif flags &= ARRAYMASK; if (flags == POINTERARRAY) { ninsts = __BYTES2OBJS__(sz); } else { ninsts = __intVal(__ClassInstPtr(cls)->c_ninstvars); } if (ninsts) { do { OBJ el; el = __InstPtr(theCopy)->i_instvars[ninsts-1]; __STORE_SPC(theCopy, el, spc); } while (--ninsts); } } RETURN (theCopy); } } %}. "/ fallBack for special objects & memoryAllocation failure case ^ self slowShallowCopy ! simpleDeepCopy "return a copy of the object with all subobjects also copied. This method does NOT handle cycles - but is included to allow this slightly faster copy in situations where it is known that no recursive references occur (LargeIntegers for example). NOTICE: you will run into trouble, when trying this with recursive objects (usually recursionInterrupt or memory-alert). This method corresponds to the 'traditional' deepCopy found in the Blue book." |myClass aCopy| (myClass := self class) isVariable ifTrue:[ aCopy := myClass basicNew:(self basicSize). ] ifFalse:[ aCopy := myClass basicNew ]. "copy the instance variables" aCopy cloneFrom:self performing:#simpleDeepCopy. ^ aCopy "a bad example (but ST/X should survive ...)" " |a| a := Array new:3. a at:3 put:a. a simpleDeepCopy " ! skipInstvarIndexInDeepCopy:index "a helper for deepCopy; only indices for which this method returns false are copied in a deep copy. The default is false here - which means that everything is copied. Can be redefined in subclasses for partial copies" ^ false ! slowShallowCopy "return a copy of the object with shared subobjects (a shallow copy) i.e. the copy shares referenced instvars with its original. This method is only invoked as a fallback from #shallowCopy." |myClass aCopy| (myClass := self class) isVariable ifTrue:[ aCopy := myClass basicNew:(self basicSize). ] ifFalse:[ aCopy := myClass basicNew ]. "copy the instance variables" aCopy cloneFrom:self performing:#yourself. ^ aCopy ! ! !Object methodsFor:'debugging'! assert:aBooleanOrBlock "fail and report an error, if the argument does not evaluate to true" "{ Pragma: +optSpace }" aBooleanOrBlock == true ifTrue:[^ self]. (Smalltalk at:#IgnoreAssertion ifAbsent:false) == true ifTrue:[^ self]. "/ could still be a block or false. (aBooleanOrBlock value) ifFalse:[ AssertionFailedError raiseRequestWith:self errorString:('Assertion failed in ', thisContext methodHome sender printString, '[', thisContext methodHome sender lineNumber printString,']') ]. " self assert:false " "Modified: / 20-08-2010 / 17:13:06 / cg" ! assert:aBooleanOrBlock message:messageIfFailing "fail, if the argument does not evaluate to true and report an error" "{ Pragma: +optSpace }" aBooleanOrBlock == true ifTrue:[^ self]. (Smalltalk at:#IgnoreAssertion ifAbsent:false) == true ifTrue:[^ self]. (aBooleanOrBlock value) ifFalse:[ AssertionFailedError raiseRequestWith:self errorString:(messageIfFailing, ' {',thisContext methodHome sender "methodHome" printString,' }') ]. " self assert:false message:'xxx' " "Modified (comment): / 06-03-2012 / 11:26:48 / cg" ! basicInspect "{ Pragma: +optSpace }" "launch an inspector on the receiver. this method should NOT be redefined in subclasses." Inspector isNil ifTrue:[ " for systems without GUI " self warn:'No Inspector defined (Inspector is nil).' ] ifFalse:[ Inspector openOn:self ] "Modified: 18.5.1996 / 15:43:25 / cg" ! breakPoint:someKey "{ Pragma: +optSpace }" "Like halt, but disabled by default. Can be easily enabled. Can be filtered on the arguments value (typically: a symbol). Code with breakpoints may be even checked into the source repository" "Example: nil breakPoint:#stefan" "/ dont send #breakPoint:info: here - ask cg why. (self isBreakPointEnabled:someKey) ifTrue:[ ^ HaltSignal raiseRequestWith:someKey errorString:('Breakpoint encountered: %1' bindWith:someKey) ]. " nil breakPoint:#stefan nil breakPoint:#stefan info:'Hello' Smalltalk enableBreakPoint:#stefan. Smalltalk disableBreakPoint:#stefan. EncounteredBreakPoints. Smalltalk enableBreakPoint:#cg. Smalltalk disableBreakPoint:#cg. " ! breakPoint:someKey info:infoString "{ Pragma: +optSpace }" "Like halt, but disabled by default. Can be easily enabled. Can be filtered on the arguments value (typically: a symbol). Code with breakpoints may be even checked into the source repository" "Example: nil breakPoint:#stefan" (self isBreakPointEnabled:someKey) ifTrue:[ ^ HaltSignal raiseRequestWith:someKey errorString:(infoString bindWith:someKey) ]. ! browse "open a browser on the receivers class" self class theNonMetaclass browse " 10 browse Collection browse Collection class browse " ! debuggingCodeFor:someKey is:aBlock "{ Pragma: +optSpace }" "aBlock is evaluated if breakPoints for somekey are enabled. Allows for debugging code to be enabled/disabled via the breakpoint browser. Can be easily enabled. Can be filtered on the arguments value (typically: a symbol). Code with breakpoints may be even checked into the source repository" "Example: nil debuggingCodeFor:#cg is:[ self halt ]" (self isBreakPointEnabled:someKey) ifTrue:[ aBlock value ]. " Smalltalk disableBreakPoint:#cg. nil debuggingCodeFor:#cg is:[ Transcript showCR:'here is some debug message for cg' ]. nil debuggingCodeFor:#stefan is:[ Transcript showCR:'here is some debug message for sv' ]. Smalltalk enableBreakPoint:#cg. nil debuggingCodeFor:#cg is:[ Transcript showCR:'here is some debug message for cg' ]. nil debuggingCodeFor:#stefan is:[ Transcript showCR:'here is some debug message for sv' ]. Smalltalk disableBreakPoint:#cg. " ! disableAllBreakPoints "disable all parametrized breakPoints (with any key as parameter)" EnabledBreakPoints := nil " nil enableBreakPoint:#cg. nil breakPoint:#cg. nil disableAllBreakPoints. nil breakPoint:#cg. " "Created: / 06-03-2012 / 15:32:28 / cg" ! disableBreakPoint:someKey "disable parametrized breakPoints with someKey as parameter" "{ Pragma: +optSpace }" EnabledBreakPoints notNil ifTrue:[ EnabledBreakPoints remove:someKey ifAbsent:[]. EnabledBreakPoints := EnabledBreakPoints asNilIfEmpty. ]. " nil enableBreakPoint:#cg. nil breakPoint:#cg. nil disableBreakPoint:#cg nil breakPoint:#cg. " "Modified (comment): / 06-03-2012 / 15:31:51 / cg" ! enableBreakPoint:someKey "enable parametrized breakPoints with someKey as parameter" "{ Pragma: +optSpace }" EnabledBreakPoints isNil ifTrue:[ EnabledBreakPoints := Set new. ]. EnabledBreakPoints add:someKey. " nil enableBreakPoint:#cg. nil breakPoint:#cg. nil disableBreakPoint:#cg nil breakPoint:#cg. " "Modified (comment): / 06-03-2012 / 15:31:47 / cg" ! halt "{ Pragma: +optSpace }" "enter debugger with halt-message. The error is reported by raising the HaltSignal exception." Smalltalk ignoreHalt ifTrue:[^ self]. "/ don't send #halt: here - ask cg why. HaltInterrupt raiseRequestWith:#halt. ^ self " (3 halt * 5) " "Modified: / 02-08-1999 / 17:00:29 / stefan" "Modified: / 18-11-2010 / 11:21:51 / cg" ! halt:aString "{ Pragma: +optSpace }" "enter debugger with halt-message. The error is reported by raising the HaltSignal exception." Smalltalk ignoreHalt ifTrue:[^ self]. HaltInterrupt raiseRequestWith:#halt: errorString:aString. ^ self "Modified: / 18-11-2010 / 11:22:16 / cg" ! isBreakPointEnabled:someKey "{ Pragma: +optSpace }" "controls which breakpoints to be enabled." "/ something = OperatingSystem getLoginName ifTrue:[^ true]. "/ something = 'testThis' ifTrue:[^ true]. EncounteredBreakPoints notNil ifTrue:[ EncounteredBreakPoints add:someKey ]. ^ (EnabledBreakPoints notNil and:[ EnabledBreakPoints includes:someKey ]) " nil enableBreakPoint:#cg. nil breakPoint:#cg. nil disableBreakPoint:#cg nil breakPoint:#cg. EncounteredBreakPoints := Set new. " ! mustBeBoolean "this message is sent by the VM, if a non-Boolean receiver is encountered in an if* or while* message. Caveat: for now, this is only sent by the interpreter; both the JIT and the stc compiler treat it as undefined." self error:'Non boolean receiver - proceed for truth' mayProceed:true. ^ true ! mustBeKindOf:aClass "for compatibility & debugging support: check if the receiver isKindOf:aClass and raise an error if not. Notice: it is VERY questionable, if it makes sense to add manual type checks to a dynamically typed language like smalltalk. It will, at least, slow down performance, make your code less reusable and clutter your code with stupid sends of this selector. Also, read the comment in isKindOf:, regarding the use of isXXX check methods. You see: The author does not like this at all ..." (self isKindOf:aClass) ifFalse:[ self error:'argument is not of expected type' ] ! obsoleteFeatureWarning "{ Pragma: +optSpace }" "in methods which are going to be changed, a send to this method is used to tell programmers that some feature/semantics is used which is going to be changed in later ST/X versions. Hopefully, this warning message is annoying enough for you to change the code... ;-)." self obsoleteFeatureWarning:nil from:thisContext sender ! obsoleteFeatureWarning:message "{ Pragma: +optSpace }" "in methods which are going to be changed, a send to this method is used to tell programmers that some feature/semantics is used which is going to be changed in later ST/X versions. Hopefully, this warning message is annoying enough for you to change the code... ;-). This message is intended for application developers, so its printed as info message." self obsoleteFeatureWarning:message from:thisContext sender ! obsoleteFeatureWarning:message from:aContext "{ Pragma: +optSpace }" "in methods which are going to be changed, a send to this method is used to tell programmers that some feature/semantics is used which is going to be changed in later ST/X versions. Hopefully, this warning message is annoying enough for you to change the code... ;-). This message is intended for application developers, so its printed as info message." |spec sender| spec := aContext methodPrintString. sender := aContext sender. ('WARNING: the ''' , spec , ''' semantics will be changed.') infoPrintCR. (' Its behavior may be different in future ST/X versions.') infoPrintCR. (' called from ' , sender printString) infoPrintCR. ((sender selector ? '') startsWith:'perform:') ifTrue:[ (' called from ' , sender sender printString) infoPrintCR. ]. message notNil ifTrue:[ '------> ' infoPrint. message infoPrintCR ] " Object obsoleteFeatureWarning:'foo' from:thisContext sender sender " ! obsoleteMethodWarning "{ Pragma: +optSpace }" "in methods which are going to be obsoleted, a self send to this method is used to tell programmers that a method is used which is going to be removed in later ST/X versions. Find all methods which will be obsolete soon by looking at senders of this message. Hopefully, this warning message is annoying enough for you to change the code... ;-)" self obsoleteMethodWarning:nil from:thisContext sender ! obsoleteMethodWarning:message "{ Pragma: +optSpace }" "in methods which are going to be obsoleted, a self send to this method is used to tell programmers that a method is used which is going to be removed in later ST/X versions. Find all methods which will be obsolete soon by looking at senders of this message. Hopefully, this warning message is annoying enough for you to change the code... ;-)" self obsoleteMethodWarning:message from:thisContext sender ! obsoleteMethodWarning:message from:aContext "{ Pragma: +optSpace }" "in methods which are going to be obsoleted, a self-send to this method is used to tell programmers that a method is used which is going to be removed in later ST/X versions. Find all methods which will be obsolete soon by looking at senders of this message. Hopefully, this warning message is annoying enough for you to change the code... ;-). This message is intended for application developers, so its printed as info message." |spec sender| Smalltalk isSmalltalkDevelopmentSystem ifFalse:[ "ignore in production systems" ^ self. ]. spec := aContext methodPrintString. sender := aContext sender. ('WARNING: the ''' , spec , ''' method is obsolete.') infoPrintCR. (' And may not be present in future ST/X versions.') infoPrintCR. (' called from ' , sender printString) infoPrintCR. (sender selector startsWith:'perform:') ifTrue:[ sender := sender sender. (sender selector startsWith:'perform:') ifTrue:[ sender := sender sender. ]. (' called from ' , sender printString) infoPrintCR. ]. message notNil ifTrue:[ '------> ' infoPrint. message infoPrintCR ]. UserPreferences current haltInObsoleteMethod ifTrue:[ self halt:(message , ' - please fix this now!!') ]. " Object obsoleteMethodWarning:'foo' from:thisContext sender sender " "Modified: / 10-08-2006 / 13:13:11 / cg" ! todo "used to mark code pieces that have to be implemented" self halt:'more work needed here'. " example: ... self todo. ... " ! todo:aBlock "used to mark code pieces that have to be implemented" "/ self halt. "/ aBlock value. " example: ... self todo:[ code which needs more work ... ]. ... " "Created: / 25-05-2007 / 21:34:39 / cg" "Modified: / 29-05-2007 / 12:11:33 / cg" ! tracePoint:someKey "{ Pragma: +optSpace }" "Like transcript show, but disabled by default. Can be easily enabled. Can be filtered on the arguments value (typically: a symbol). Code with tracepoints may be even checked into the source repository" "Example: nil tracePoint:#stefan" (self isBreakPointEnabled:someKey) ifTrue:[ ^ Transcript showCR:('Tracepoint (at %1 for %3 from %2)' bindWith:(Timestamp now printString) with:(thisContext sender printString) with:someKey) ]. " nil tracePoint:#stefan nil tracePoint:#stefan message:'Hello' Smalltalk enableBreakPoint:#stefan. Smalltalk disableBreakPoint:#stefan. " "Modified: / 28-08-2013 / 21:41:54 / cg" ! tracePoint:someKey message:messageBlockOrString "{ Pragma: +optSpace }" "Like transcript show, but disabled by default. Can be easily enabled. Can be filtered on the arguments value (typically: a symbol). Code with tracepoints may be even checked into the source repository" "Example: nil tracePoint:#stefan" (self isBreakPointEnabled:someKey) ifTrue:[ Transcript showCR:('Tracepoint: %4 (at %1 for %3 from %2)' bindWith:(Timestamp now printString) with:(thisContext sender printString) with:someKey with:messageBlockOrString value) ]. " Smalltalk enableBreakPoint:#stefan. nil tracePoint:#stefan. nil tracePoint:#stefan message:'Hello'. nil tracePoint:#stefan message:['Hello from block']. Smalltalk disableBreakPoint:#stefan. " "Modified: / 28-08-2013 / 21:41:47 / cg" ! ! !Object methodsFor:'dependents access'! addDependent:anObject "make the argument, anObject be a dependent of the receiver" |wasBlocked| "/ must do this save from interrupts, since the dependents collection "/ is possibly accessed from multiple threads. "/ Used to use #valueUninterruptably here; inlined that code for slightly "/ faster execution. wasBlocked := OperatingSystem blockInterrupts. [ |deps dep| deps := self dependents. "/ to save a fair amount of memory in case of "/ many dependencies, we store a single dependent in "/ a WeakArray, and switch to a WeakSet if more dependents are "/ added. (deps isNil or:[deps size == 0]) ifTrue:[ self dependents:(WeakArray with:anObject) ] ifFalse:[ deps class == WeakArray ifTrue:[ dep := deps at:1. dep ~~ anObject ifTrue:[ (dep isNil or:[dep == 0]) ifTrue:[ deps at:1 put:anObject ] ifFalse:[ self dependents:(WeakIdentitySet with:dep with:anObject) ] ] ] ifFalse:[ deps add:anObject ] ] ] ensure:[ wasBlocked ifFalse:[ OperatingSystem unblockInterrupts ] ] "Modified: / 27.10.1997 / 19:35:52 / cg" ! breakDependents "remove all dependencies from the receiver" self dependents:nil. self nonWeakDependents:nil "Modified: / 19.4.1996 / 10:55:36 / cg" "Created: / 27.2.1998 / 11:26:11 / stefan" ! breakDependentsRecursively "remove all dependencies from the receiver and recursively from all objects referred to by the receiver." self breakDependents. 1 to:self class instSize do:[:idx | (self instVarAt:idx) breakDependentsRecursively. ]. 1 to:self basicSize do:[:idx | (self basicAt:idx) breakDependentsRecursively. ] ! dependents "return a Collection of dependents. The default implementation here uses a global WeakDictionary to store dependents This may be too slow for high frequency change&update, therefore, some classes (Model) redefine this for better performance. Notice the mentioning of a WeakDictionary - read the classes documentation." |deps| (deps := Dependencies at:self ifAbsent:nil) isNil ifTrue:[ ^ #(). ]. ^ deps "Modified: / 26.1.1998 / 11:18:15 / cg" ! dependents:aCollection "set the collection of dependents. The default implementation here uses a global Dictionary to store dependents which may be too slow for high frequency change&update. Therefore, some classes (Model) redefine this for better performance." "/ must do this save from interrupts, since the dependents collection "/ is possibly accessed from multiple threads. "/ Used to use #valueUninterruptably here; inlined that code for slightly "/ faster execution (and to avoid creation of garbage blocks). (OperatingSystem blockInterrupts) ifTrue:[ "/ the common case - already blocked (aCollection isNil or:[aCollection isEmpty]) ifTrue:[ Dependencies removeKey:self ifAbsent:nil ] ifFalse:[ Dependencies at:self put:aCollection ]. ^ self ]. [ (aCollection isNil or:[aCollection isEmpty]) ifTrue:[ Dependencies removeKey:self ifAbsent:nil ] ifFalse:[ Dependencies at:self put:aCollection ]. ] ensure:[ OperatingSystem unblockInterrupts ] "Modified: 30.1.1997 / 21:22:10 / cg" ! dependentsDo:aBlock "evaluate aBlock for all of my dependents" |deps nwDeps| deps := self dependents. deps size ~~ 0 ifTrue:[ deps do:[:d | (d notNil and:[d ~~ 0]) ifTrue:[ aBlock value:d ] ] ]. nwDeps := self nonWeakDependents. (nwDeps ~~ deps and:[nwDeps size ~~ 0]) ifTrue:[ nwDeps do:aBlock ]. "Modified: / 30.1.1998 / 14:03:40 / cg" ! myDependents "same as dependents - ST-80 compatibility" ^ self dependents ! release "remove all references to objects that may refer to self. Subclasses may redefine this method but should do a 'super release'." self breakDependents "Modified: / 27.2.1998 / 11:29:35 / stefan" ! removeDependent:anObject "make the argument, anObject be independent of the receiver" |wasBlocked| "/ must do this save from interrupts, since the dependents collection "/ is possibly accessed from multiple threads. "/ Used to use #valueUninterruptably here; inlined that code for slightly "/ faster execution. wasBlocked := OperatingSystem blockInterrupts. [ |deps n d| deps := self dependents. deps size ~~ 0 ifTrue:[ "/ to save a fair amount of memory in case of "/ many dependencies, we store a single dependent in "/ a WeakArray, and switch to a WeakSet if more dependents are "/ added. Here we have to do the inverse ... ((deps class == WeakArray) or:[deps class == Array]) ifTrue:[ ((d := deps at:1) == anObject or:[d isNil or:[d == 0]]) ifTrue:[ self dependents:nil ] ] ifFalse:[ deps remove:anObject ifAbsent:[]. (n := deps size) == 0 ifTrue:[ self dependents:nil ] ifFalse:[ n == 1 ifTrue:[ d := deps firstIfEmpty:nil. d notNil ifTrue:[ deps := (deps isWeakCollection ifTrue:[WeakArray] ifFalse:[Array]) with:d ] ifFalse:[ deps := nil ]. self dependents:deps. ] ] ] ] ] ensure:[ wasBlocked ifFalse:[ OperatingSystem unblockInterrupts ] ] "Modified: / 05-07-2011 / 22:49:31 / cg" ! ! !Object methodsFor:'dependents access (non weak)'! addNonWeakDependent:anObject "make the argument, anObject be a nonWeak dependent of the receiver. Be careful: this nonWeakDependency will prevent the dependent from being garbage collected unless the dependency is removed. This is a private mechanism, for directed dependencies." |wasBlocked| "/ must do this save from interrupts, since the dependents collection "/ is possibly accessed from multiple threads. "/ Used to use #valueUninterruptably here; inlined that code for slightly "/ faster execution. wasBlocked := OperatingSystem blockInterrupts. [ |deps dep| deps := self nonWeakDependents. "/ to save a fair amount of memory in case of "/ many dependencies, we store a single dependent in "/ an Array, and switch to a Set if more dependents are "/ added. deps size == 0 ifTrue:[ anObject notNil ifTrue:[ self nonWeakDependents:(Array with:anObject). ] ifFalse:[ "adding nil causes problems when adding the next one (see below: trying to add nil to IdentitySet)" "/ self halt:'try to add nil to list of dependents'. ]. ] ifFalse:[ deps class == Array ifTrue:[ dep := deps at:1. dep ~~ anObject ifTrue:[ self nonWeakDependents:(IdentitySet with:dep with:anObject) ] ] ifFalse:[ deps add:anObject ] ] ] ensure:[ wasBlocked ifFalse:[ OperatingSystem unblockInterrupts ] ] "Created: / 19.4.1996 / 10:54:08 / cg" "Modified: / 30.1.1998 / 14:03:08 / cg" ! nonWeakDependents "return a Collection of nonWeakDependents - empty if there is none. This is a private mechanism for directed dependencies." NonWeakDependencies isNil ifTrue:[^ #()]. ^ NonWeakDependencies at:self ifAbsent:#() "Created: / 19.4.1996 / 10:55:06 / cg" "Modified: / 30.1.1998 / 14:06:47 / cg" ! nonWeakDependents:aCollection "set the collection of nonWeak dependents. This is a private helper for directed dependencies." [ (aCollection isNil or:[aCollection isEmpty]) ifTrue:[ NonWeakDependencies removeKey:self ifAbsent:nil ] ifFalse:[ NonWeakDependencies at:self put:aCollection ] ] valueUninterruptably "Created: 19.4.1996 / 11:07:47 / cg" ! removeNonWeakDependent:anObject "remove a nonWeak dependency from the receiver to the argument, anObject. (i.e. make it independent of the receiver)" |wasBlocked| "/ must do this save from interrupts, since the dependents collection "/ is possibly accessed from multiple threads. "/ Used to use #valueUninterruptably here; inlined that code for slightly "/ faster execution. wasBlocked := OperatingSystem blockInterrupts. [ |deps n| deps := self nonWeakDependents. deps size ~~ 0 ifTrue:[ deps class == Array ifTrue:[ (deps at:1) == anObject ifTrue:[ self nonWeakDependents:nil ] ] ifFalse:[ deps remove:anObject ifAbsent:[]. (n := deps size) == 0 ifTrue:[ self nonWeakDependents:nil ] ifFalse:[ n == 1 ifTrue:[ self nonWeakDependents:(Array with:(deps first)) ] ] ] ] ] ensure:[ wasBlocked ifFalse:[ OperatingSystem unblockInterrupts ] ] "Created: / 19.4.1996 / 11:44:44 / cg" "Modified: / 30.1.1998 / 14:04:01 / cg" ! ! !Object methodsFor:'displaying'! ascentOn:aGC "when displayed via displayOn:, some objects assume that the given y coordinate is the baseline (strings, text etc. do), while others assume that the topY coordinate is given by y. In other words: some draw above the given y coordinate. This method returns the number of pixels by which the receiver will draw above the given y coordinate." ^ aGC fontAscent ! displayOn:aGCOrStream "Compatibility append a printed desription on some stream (Dolphin, Squeak) OR: display the receiver in a graphicsContext at 0@0 (ST80). This method allows for any object to be displayed in some view (although the fallBack is to display its printString ...)" "/ what a kludge - Dolphin and Squeak mean: printOn: a stream; "/ ST/X (and some old ST80's) mean: draw-yourself on a GC. aGCOrStream isStream ifTrue:[ self printOn:aGCOrStream. ^ self ]. ^ self displayOn:aGCOrStream x:0 y:0. "Created: 29.5.1996 / 16:28:58 / cg" ! displayOn:aGC at:aPoint "ST-80 Compatibility display the receiver in a graphicsContext - this method allows for any object to be displayed in a ListView - for example." ^ self displayOn:aGC x:(aPoint x) y:(aPoint y). ! displayOn:aGC x:x y:y "display the receiver in a graphicsContext - this method allows for any object to be displayed in a ListView - for example." self displayOn:aGC x:x y:y opaque:false "Modified: 29.5.1996 / 16:29:38 / cg" ! displayOn:aGc x:x y:y opaque:opaque "display the receiver in a graphicsContext - this method allows for any object to be displayed in a ListView - for example. The fallBack here shows the receivers displayString. Notice, that the string is displayed on the baseLine; ask using #ascentOn: if required" |s yBaseline| s := self isString ifTrue:[self] ifFalse:[self displayString]. yBaseline := y "+ aGc font ascent". opaque ifTrue:[ aGc displayOpaqueString:s x:x y:yBaseline. ] ifFalse:[ aGc displayString:s x:x y:yBaseline. ]. "Modified: 29.5.1996 / 16:29:38 / cg" ! displayOpaqueOn:aGC x:x y:y "display the receiver in a graphicsContext - this method allows for any object to be displayed in a ListView - for example." self displayOn:aGC x:x y:y opaque:true "Modified: / 29.5.1996 / 16:29:38 / cg" "Created: / 26.10.1997 / 15:01:36 / cg" ! displayString "return a string used when displaying the receiver in a view; for example an Inspector. This is usually the same as printString, but sometimes redefined for a better look. Note: the base method (used by the inspector) is #displayOn:. So you should implement #displayOn: instead of #displayString in subclasses." |s| s := TextStream on:(String new:32). self displayOn:s. ^ s contents " #(1 2 3) printString #(1 2 3) displayString #(1 2 3) storeString " ! heightOn:aGC "return the height of the receiver, if it is to be displayed on aGC" ^ (aGC font onDevice:aGC device) heightOf:(self displayString) ! widthFrom:startIndex to:endIndex on:aGC "return the width of the receiver, if it is to be displayed on aGC" ^ (aGC font onDevice:aGC device) widthOf:(self displayString) from:startIndex to:endIndex ! widthOn:aGC "return the width of the receiver, if it is to be displayed on aGC" ^ (aGC font onDevice:aGC device) widthOf:(self displayString) ! ! !Object methodsFor:'double dispatching'! equalFromComplex:aComplex "adding this method here allows for any non-number to be compared to a complex and return false from this comparison. Reason: we want to be able to put both numbers and non-numbers into a collection which uses #= (i.e. a Set or Dictionary)." ^ false ! equalFromFixedPoint:aFixedPoint "adding this method here allows for any non-number to be compared to a fixedPoint and return false from this comparison. Reason: we want to be able to put both numbers and non-numbers into a collection which uses #= (i.e. a Set or Dictionary)." ^ false ! equalFromFloat:aFloat "adding this method here allows for any non-number to be compared to a float and return false from this comparison. Reason: we want to be able to put both numbers and non-numbers into a collection which uses #= (i.e. a Set or Dictionary)." ^ false ! equalFromFraction:aFraction "adding this method here allows for any non-number to be compared to a fraction and return false from this comparison. Reason: we want to be able to put both numbers and non-numbers into a collection which uses #= (i.e. a Set or Dictionary)." ^ false ! equalFromInteger:anInteger "adding this method here allows for any non-number to be compared to an integer and return false from this comparison. Reason: we want to be able to put both numbers and non-numbers into a collection which uses #= (i.e. a Set or Dictionary)." ^ false ! equalFromLargeFloat:aLargeFloat "adding this method here allows for any non-number to be compared to a largeFloat and return false from this comparison. Reason: we want to be able to put both numbers and non-numbers into a collection which uses #= (i.e. a Set or Dictionary)." ^ false ! equalFromLongFloat:aLongFloat "adding this method here allows for any non-number to be compared to a longFloat and return false from this comparison. Reason: we want to be able to put both numbers and non-numbers into a collection which uses #= (i.e. a Set or Dictionary)." ^ false ! equalFromShortFloat:aShortFloat "adding this method here allows for any non-number to be compared to a shortFloat and return false from this comparison. Reason: we want to be able to put both numbers and non-numbers into a collection which uses #= (i.e. a Set or Dictionary)." ^ false ! ! !Object methodsFor:'encoding & decoding'! decodeAsLiteralArray "given a literalEncoding in the receiver, create & return the corresponding object. The inverse operation to #literalArrayEncoding." ^ self ! encodeOn:anEncoder with:aParameter "not used any longer. Kept for backward comaptibility" self acceptVisitor:anEncoder with:aParameter ! encodingVectorForInstanceVariables "OBSOLETE, use elementDescriptorForInstanceVariables" ^ self elementDescriptorForInstanceVariablesMatching:[:val | true]. " #(1 2 3 nil true symbol) encodingVectorForInstanceVariables Dictionary new encodingVectorForInstanceVariables (5 @ nil) encodingVectorForInstanceVariables " ! encodingVectorForNonNilInstanceVariables "OBSOLETE, use elementDescriptorForNonNilInstanceVariables" ^ self elementDescriptorForInstanceVariablesMatching:[:varVal | varVal notNil]. " #(1 2 3 nil true symbol) encodingVectorForNonNilInstanceVariables (5 @ nil) encodingVectorForNonNilInstanceVariables " ! fromLiteralArrayEncoding:aSpecArray "read my attributes from aSpecArray. Recursively decodes arguments." |sel litVal val stop "{ Class:SmallInteger }" | stop := aSpecArray size. 2 to:stop by:2 do:[:i| sel := aSpecArray at:i. litVal := aSpecArray at:i + 1. (self respondsTo:sel) ifTrue:[ val := litVal decodeAsLiteralArray. self perform:sel with:val ] ifFalse:[ Transcript show:self class name; show:': unhandled literalArrayEncoding attribute: '. Transcript showCR:sel. "/ thats a debug halt, "/ it should probably be removed (to simply ignore unhandled attributes)... "/ for now, it is left in, in order to easily find incompatibilities between "/ VW and ST/X. self breakPoint:#cg. ] ] ! literalArrayEncoding "generate a literalArrayEncoding array for myself. This uses #literalArrayEncodingSlotOrder which defines the slots and order and #skippedInLiteralEncoding which defines slots to skip. For most subclasses, there is no need to redefine those." |names encoding cls skipped slots| self isLiteral ifTrue:[ ^ self ]. slots := self literalArrayEncodingSlotOrder. skipped := self skippedInLiteralEncoding. cls := self class. names := cls allInstVarNames. encoding := OrderedCollection new:(1 + (2 * (slots size - skipped size))). encoding add:cls name. slots do:[:instSlot | |value nm| nm := names at:instSlot. (skipped includes:nm) ifFalse:[ (value := self instVarAt:instSlot) notNil ifTrue:[ encoding add:(nm , ':') asSymbol. encoding add:value literalArrayEncoding ] ] ]. ^ encoding asArray " (1 -> 2) literalArrayEncoding DebugView menuSpec decodeAsLiteralArray literalArrayEncoding = DebugView menuSpec " ! literalArrayEncodingSlotOrder "define the order in which inst-slots are saved when generating a literalArrayEncoding" ^ 1 to:self class instSize ! postDecodeFrom:aDecoder aspect:aspectSymbol "invoked by xmlDecoder (and others in the future), after an object has been decoded (i.e. its instance variables have been restored)" ^ self ! skippedInLiteralEncoding "return a Collection with it's elements are slots for skipping" ^ #() ! ! !Object methodsFor:'error handling'! ambiguousMessage:aMessage "this message is sent by the system in case that it is not clear which method to execute in response to aMessage. Such situation may occur when a current selector namespace imports two namespaces and both define a method with the requested selector." ^ AmbiguousMessage raiseRequestWith:aMessage "Created: / 21-07-2010 / 15:44:20 / Jan Vrany " "Modified (comment): / 02-11-2012 / 10:14:42 / cg" ! appropriateDebugger:aSelector "{ Pragma: +optSpace }" "return an appropriate debugger to use. If there is already a debugger active on the stack, and it is the DebugView, return MiniDebugger (as a last chance) otherwise abort." |context| "DebugView cannot run without system processes" (Processor isNil or:[Processor activeProcessIsSystemProcess or:[Smalltalk isInitialized not]]) ifTrue:[ ^ MiniDebugger ]. (Screen isNil or:[Screen default isNil or:[Screen default isOpen not]]) ifTrue:[ Debugger isNil ifTrue:[^ nil]. ^ MiniDebugger ]. context := thisContext. context := context findNextContextWithSelector:aSelector or:nil or:nil. [context notNil] whileTrue:[ ((context receiver class == Debugger) and:[context selector == aSelector]) ifTrue:[ "we are already in some Debugger" (Debugger == MiniDebugger) ifTrue:[ "we are already in the MiniDebugger" ErrorRecursion ifFalse:[ Smalltalk fatalAbort:'recursive error ...' ] ]. MiniDebugger isNil ifTrue:[ Smalltalk fatalAbort:'no debugger' ]. "ok, an error occured while in the graphical debugger; lets try MiniDebugger" ^ MiniDebugger ]. context := context findNextContextWithSelector:aSelector or:nil or:nil. ]. "not within Debugger - no problem" ^ Debugger "Modified: / 23.9.1996 / 12:14:52 / stefan" "Modified: / 19.5.1999 / 18:05:00 / cg" ! cannotSendMessage:aMessage to:someReceiver "this message is sent by the runtime system (VM), when a message is sent to some object, whose class is not a valid behavior (see documentation in Behavior)." ^ VMInternalError raiseWith:someReceiver errorString:('bad class in send of #' , aMessage selector) "Modified: 23.1.1997 / 00:05:39 / cg" ! conversionErrorSignal "return the signal used for conversion error handling" ^ self class conversionErrorSignal ! doesNotUnderstand:aMessage "this message is sent by the runtime system (VM) when a message is not understood by some object (i.e. there is no method for that selector). The original message has been packed into aMessage (i.e. the receiver, selector and any arguments) and the original receiver is then sent the #doesNotUnderstand: message. Here, we raise another signal which usually enters the debugger. You can of course redefine #doesNotUnderstand: in your classes to implement message delegation, or handle the MessageNotUnderstood exception gracefully." ^ MessageNotUnderstood raiseRequestWith:aMessage ! elementBoundsError "{ Pragma: +optSpace }" "report an error that badElement is out of bounds (i.e. cannot be put into that collection). The error is reported by raising the ElementBoundsError exception." ^ ElementBoundsError raise "Modified: 8.5.1996 / 09:12:45 / cg" ! elementBoundsError:aValue "{ Pragma: +optSpace }" "report an error that aValue is not valid as element (i.e. cannot be put into that collection). The error is reported by raising the ElementBoundsError exception." ^ ElementBoundsError raiseWith:aValue "Modified: 8.5.1996 / 09:12:45 / cg" ! elementNotCharacter "{ Pragma: +optSpace }" "report an error that object to be stored is no Character. (usually when storing into Strings). The error is reported by raising the ElementBoundsError exception." ^ ElementBoundsError raise "Modified: 8.5.1996 / 09:12:49 / cg" ! elementNotInteger "{ Pragma: +optSpace }" "report an error that object to be stored is not Integer. (in collections that store integers only). The error is reported by raising the ElementOutOfBoundsSignal exception." ^ ElementBoundsError raise "Modified: 8.5.1996 / 09:12:51 / cg" ! error "{ Pragma: +optSpace }" "report error that an error occured. The error is reported by raising the Error exception, which is non-proceedable. If no handler has been setup, a debugger is entered." Error raiseWith:#error: " nil error " "Modified: / 8.5.1996 / 09:13:01 / cg" "Modified: / 2.8.1999 / 17:00:19 / stefan" ! error:aString "{ Pragma: +optSpace }" "Raise an error with error message aString. The error is reported by raising the Error exception, which is non-proceedable. If no handler has been setup, a debugger is entered." Error raiseWith:#error: errorString:aString " nil error:' bad bad bad' " "Modified: 8.5.1996 / 09:13:04 / cg" ! error:aString mayProceed:mayProceed "{ Pragma: +optSpace }" "enter debugger with error-message aString. The error is reported by raising either the non-proceedable Error exception, or the ProceedableError exception." mayProceed ifTrue:[ ^ ProceedableError raiseRequestWith:#error: errorString:aString ]. Error raiseWith:#error: errorString:aString "Modified: 8.5.1996 / 09:13:04 / cg" ! errorInvalidFormat "{ Pragma: +optSpace }" "report an error that some conversion to/from string representation failed typically when converting numbers, date, time etc." ^ ConversionError raiseErrorString:'invalid format' ! errorKeyNotFound:aKey "{ Pragma: +optSpace }" "report an error that a key was not found in a collection. The error is reported by raising the KeyNotFoundError exception." ^ KeyNotFoundError raiseRequestWith:aKey errorString:(' ', aKey printString) " Dictionary new at:#nonExistantElement " ! errorNotFound "{ Pragma: +optSpace }" "report an error that no element was found in a collection. The error is reported by raising the NotFoundSignal exception." ^ NotFoundError raiseRequestWith:nil "Modified: / 8.5.1996 / 09:13:11 / cg" "Modified: / 26.7.1999 / 10:51:50 / stefan" ! errorNotFound:errorString "{ Pragma: +optSpace }" "report an error that no element was found in a collection. The error is reported by raising the NotFoundSignal exception." ^ NotFoundError raiseRequestErrorString:errorString ! errorSignal "return the signal used for error/error: handling" ^ self class errorSignal "Created: / 19.6.1998 / 02:32:32 / cg" ! handlerForSignal:exceptionHandler context:theContext originator:originator " should never be invoked for non-blocks/non-exceptions/non-signals" thisContext isRecursive ifTrue:[^ nil]. 'Warning: handlerForSignal invoked for: ' print. self printCR. ' context: ' print. theContext printCR. ' originator: ' print. originator printCR. ' sender: ' print. thisContext sender printCR. "/ MiniDebugger enter:thisContext withMessage:'oops' mayProceed:true. self error:'this method should only be invoked for blocks, exceptions and signals'. ! implementedBySubclass "{ Pragma: +optSpace }" "this is sent by ST/V code - its the same as #subclassResponsibility" ^ SubclassResponsibilityError raiseRequestErrorString:'method must be reimplemented in ST/V subclass' ! indexNotInteger "{ Pragma: +optSpace }" "report an error that index is not an Integer. (when accessing collections indexed by an integer key). The error is reported by raising the NonIntegerIndexSignal exception." ^ NonIntegerIndexError raiseRequestWith:nil "Modified: / 8.5.1996 / 09:13:37 / cg" "Modified: / 26.7.1999 / 10:57:43 / stefan" ! indexNotInteger:anIndex "{ Pragma: +optSpace }" "report an error that index is not an Integer. (when accessing collections indexed by an integer key). The error is reported by raising the NonIntegerIndexSignal exception." ^ NonIntegerIndexError raiseRequestWith:anIndex "Created: / 16.5.1998 / 19:39:41 / cg" ! indexNotIntegerOrOutOfBounds:index "{ Pragma: +optSpace }" "report an error that index is either non-integral or out of bounds" index isInteger ifFalse:[ ^ self indexNotInteger:index ]. ^ self subscriptBoundsError:index ! integerCheckError "{ Pragma: +optSpace }" "generated when a variable declared with an integer type gets a bad value assigned" "/ ^ self error:'bad assign of ' , self printString , "/ ' (' , self class name , ') to integer-typed variable' ^ InvalidTypeError raiseRequestErrorString:( 'bad assign of ' , self printString , ' (' , self class name , ') to integer-typed variable') "Modified: / 02-11-2012 / 10:25:36 / cg" ! invalidCodeObject "{ Pragma: +optSpace }" "this is sent by VM if it encounters some non-method for execution" "/ self error:'not an executable code object' ^ ExecutionError raiseRequestErrorString:'not an executable code object' "Created: / 01-08-1997 / 00:16:44 / cg" ! invalidMessage "{ Pragma: +optSpace }" "this is sent by ST/V code - it's the same as #shouldNotImplement" ^ self shouldNotImplement "Modified (comment): / 02-11-2012 / 10:11:18 / cg" ! mustBeRectangle "{ Pragma: +optSpace }" "report an argument-not-rectangle-error" "/ ^ self error:'argument must be a Rectangle' ^ InvalidTypeError raiseRequestErrorString:'argument must be a Rectangle' "Modified: / 02-11-2012 / 10:24:53 / cg" ! mustBeString "{ Pragma: +optSpace }" "report an argument-not-string-error" "/ ^ self error:'argument must be a String' ^ InvalidTypeError raiseRequestErrorString:'argument must be a String' "Modified: / 02-11-2012 / 10:24:35 / cg" ! notIndexed "{ Pragma: +optSpace }" "report an error that receiver has no indexed instance variables. The error is reported by raising the SubscriptOutOfBoundsSignal exception." ^ SubscriptOutOfBoundsError raiseRequestErrorString:'receiver has no indexed variables' " 1234 at:4 " "Modified: 26.7.1996 / 16:43:13 / cg" ! notYetImplemented "{ Pragma: +optSpace }" "report an error that some functionality is not yet implemented. This is here only for compatibility - it has the same meaning as shouldImplement." ^ MethodNotAppropriateError raiseRequestErrorString:'method/functionality is not yet implemented'. "Modified: / 02-11-2012 / 10:24:12 / cg" ! openDebuggerOnException:ex "{ Pragma: +optSpace }" "enter the debugger on some unhandled exception" |msgString debugger answer| msgString := ex descriptionForDebugger. " if there is no debugger, ask for ignore or exit. Exit will terminate the application. ignore will raise an AbortOperationRequest. " Debugger isNil ifTrue:[ msgString := 'Error: ' , msgString. thisContext isRecursive ifTrue:[ msgString errorPrintCR. Smalltalk fatalAbort:'recursive unhandled exception' ]. Smalltalk isStandAloneApp ifTrue:[ (ex creator == NoHandlerError and:[HaltInterrupt handles:ex exception]) ifTrue:[ "/ 'Halt ignored' infoPrintCR. ^ nil ]. "don't output the message, if the exception is a UserInterrupt (CTRL-C)" (ex creator == NoHandlerError and:[ex exception creator == UserInterrupt]) ifTrue:[ ex description errorPrintCR. OperatingSystem exit:130. ]. ]. (Dialog notNil and:[Screen default notNil]) ifTrue:[ false "oldCode" ifTrue:[ AbortOperationRequest isHandled ifTrue:[ answer := OptionBox request:msgString label:msgString buttonLabels:#('Exit' 'Terminate Thread' 'Ignore' 'Abort' ) values:#(exit terminate ignore abort) default:#abort. ] ifFalse:[ answer := OptionBox request:msgString label:msgString buttonLabels:#('Exit' 'Terminate Thread' 'Ignore' ) values:#(exit terminate ignore ) default:#terminate. ]. answer isNil ifTrue:[ answer := #ignore]. answer == #abort ifTrue:[ ^ AbortOperationRequest raiseRequest ]. answer == #ignore ifTrue:[ ^ nil ]. answer == #terminate ifTrue:[ Processor activeProcess isSystemProcess ifTrue:[ (Dialog confirm:'Are you sure (this might finish the application)') ifFalse:[ ^ nil ]. ]. ^ Processor activeProcess terminate. ]. "asking second time here to prevent the user from accidently closing his app" answer == #exit ifTrue:[ answer := OptionBox request:'Do you really wish to exit this application (all changes will be lost)?' label:msgString buttonLabels:#('Yes' 'No' ) values:#(exit abort) default:#abort. ]. answer == #abort ifTrue:[ ^ AbortOperationRequest raiseRequest ]. (Dialog confirm:'Are you sure you want to finish the application ?') ifFalse:[ ^ nil ]. ] ifFalse:[ self errorNotify:msgString from:ex suspendedContext allowDebug:false mayProceed:ex willProceed. "/ arrive here if proceeded... ^ nil ]. ]. "don't output the message, if the exception is a UserInterrupt (CTRL-C)" (ex creator == NoHandlerError and:[ex exception creator == UserInterrupt]) ifTrue:[ OperatingSystem exit:130. ]. msgString errorPrintCR. thisContext fullPrintAll. OperatingSystem exit:1 ]. " find an appropriate debugger to use " debugger := self appropriateDebugger:(thisContext selector). debugger isNil ifTrue:[ ^ AbortOperationRequest raiseRequest ]. ^ debugger enterException:ex. "/ ^ debugger "/ enter:ex returnableSuspendedContext "/ withMessage:ex descriptionForDebugger "/ mayProceed:(ex mayProceed). "Modified: / 05-12-2011 / 11:53:10 / cg" ! primitiveFailed "{ Pragma: +optSpace }" "report an error that some primitive code failed. The error is reported by raising the PrimitiveFailure exception. Sorry for the code duplication: it avoids the extra frame in the debugger." |sender| sender := thisContext sender. ^ PrimitiveFailure raiseRequestWith:(Message selector:sender selector arguments:sender args) in:sender. " 1234 primitiveFailed [ ExternalBytes new basicAt:40 ] on:PrimitiveFailure do:[:ex| ex inspect ] " ! primitiveFailed:messageString "{ Pragma: +optSpace }" "report an error that some primitive code failed. The error is reported by raising the PrimitiveFailureSignal exception." |sender| sender := thisContext sender. ^ PrimitiveFailure raiseRequestWith:(Message selector:sender selector arguments:sender args) errorString:messageString in:sender. " 1234 primitiveFailed:'this is a test' " ! shouldImplement "{ Pragma: +optSpace }" "report an error that this message/functionality should be implemented. This is send by automatically generated method bodies or inside as-yet-uncoded branches of existing methods." |sender| sender := thisContext sender. ^ UnimplementedFunctionalityError raiseRequestWith:(Message selector:sender selector arguments:sender args) " self shouldImplement " ! shouldImplement:what "{ Pragma: +optSpace }" "report an error that this message/functionality should be implemented. This is send by automatically generated method bodies or inside as-yet-uncoded branches of existing methods." |sender| sender := thisContext sender. ^ UnimplementedFunctionalityError raiseRequestWith:(Message selector:sender selector arguments:sender args) errorString:what " self shouldImplement:'foobar' " ! shouldNeverBeReached "report an error that this point may never be reached." ^ ExecutionError raiseRequestErrorString:'Oops, this may never reached. Something somewhere was terribly wrong.'. "Modified: / 20-04-2005 / 18:59:28 / janfrog" ! shouldNeverBeSent "report an error that this message may never be sent to the reciever" ^ MethodNotAppropriateError raiseRequestErrorString:'This message never may be sent to me'. "Modified: / 20-04-2005 / 18:59:28 / janfrog" "Modified: / 02-11-2012 / 10:10:42 / cg" ! shouldNotImplement "{ Pragma: +optSpace }" "report an error that this message should not be implemented - i.e. that a method is invoked which is not appropriate for the receiver." ^ MethodNotAppropriateError raiseRequestErrorString:'method/functionality is not appropriate for class'. "Modified: / 02-11-2012 / 10:02:25 / cg" ! subclassResponsibility "{ Pragma: +optSpace }" "report an error that this message should have been reimplemented in a subclass" ^ SubclassResponsibilityError raiseRequestWith:thisContext sender selector ! subclassResponsibility:msg "{ Pragma: +optSpace }" "report an error that this message should have been reimplemented in a subclass" ^ SubclassResponsibilityError raiseRequestErrorString:msg ! subscriptBoundsError "{ Pragma: +optSpace }" "report an error that some index is out of bounds. (when accessing indexable collections). The error is reported by raising the SubscriptOutOfBoundsSignal exception." ^ SubscriptOutOfBoundsSignal raiseRequestWith:nil "Modified: / 26.7.1996 / 16:45:42 / cg" "Modified: / 26.7.1999 / 10:58:27 / stefan" ! subscriptBoundsError:anIndex "{ Pragma: +optSpace }" "report an error that anIndex is out of bounds. (when accessing indexable collections). The error is reported by raising the SubscriptOutOfBoundsSignal exception." ^ SubscriptOutOfBoundsError raiseRequestWith:anIndex errorString:('subscript (' , anIndex printString , ') out of bounds') "Modified: / 17.11.2001 / 22:49:56 / cg" ! typeCheckError "{ Pragma: +optSpace }" "generated when a variable declared with a type hint gets a bad value assigned" "/ ^ self error:'bad assign of ' , self printString , "/ ' (' , self class name , ') to typed variable' ^ InvalidTypeError raiseRequestErrorString: ('bad assign of ' , self printString , ' (' , self class name , ') to typed variable') "Modified: / 02-11-2012 / 10:19:15 / cg" ! ! !Object methodsFor:'evaluation'! argumentCount "compatibility with Blocks and Messages. Answer 0, since we only understand #value. By implementing this, you can pass any object as an exception handler." ^ 0 " [1 // 0] on:ArithmeticError do:9999 " ! value "return the receiver itself. This allows every object to be used where blocks or valueHolders are typically used, and allows for valueHolders and blocks to be used interchangably in some situations. Time will show, if this is a good idea or leads to sloppy programming style ... (the idea was borrowed from the Self language). WARNING: dont 'optimize' away ifXXX: blocks (i.e. do NOT replace foo ifTrue:[var1] ifFalse:[var2] by: foo ifTrue:var1 ifFalse:var2 ) - the compilers will only generate inline code for the if, iff the argument(s) are blocks - otherwise, a true send is generated. This 'oprimization' will work semantically correct, but execute SLOWER instead." ^ self " #(1 2 3 4) indexOf:5 ifAbsent:0 #(1 2 3 4) indexOf:5 ifAbsent:[0] 1 > 2 ifTrue:['yes'] ifFalse:['no'] 1 > 2 ifTrue:'yes' ifFalse:'no' " "DO NOT DO THIS (its slower) (1 > 4) ifTrue:a ifFalse:b USE (the compiler optimizes blocks in if/while): (1 > 4) ifTrue:[a] ifFalse:[b] " "Modified: 3.5.1996 / 11:57:08 / cg" ! ! !Object methodsFor:'finalization'! disposed "OBSOLETE INTERFACE: use #finalize this is invoked for objects which have been registered in a Registry, when the original object dies. Subclasses may redefine this method" ^ self ! executor "Return the object which does the finalization for me. This interface is also VW & Sqeak compatible," "for now, send #shallowCopyForFinalization, to be compatible with classes designed for old ST/X versions" ^ self shallowCopyForFinalization ! finalizationLobby "answer a Registry used for finalization. Use a generic Registry for any object. Subclasses using their own Registry should redefine this" ^ FinalizationLobby ! finalize "this is invoked for executor objects which have been registered in a Registry, when the original object dies. Subclasses may redefine this method This interface is also VW-compatible" "send #disposed for compatibility with existing classes that still implement the obsolete #disposed message" ^ self disposed ! reRegisterForFinalization "re-register mySelf for later finalization. This will create a new executor, which will receive a #finalize message when the receiver is garbage collected." self finalizationLobby registerChange:self ! registerForFinalization "register mySelf for later finalization. Once registered, the executor of the receiver will receive a #finalize message when the receiver is garbage collected." self finalizationLobby register:self ! shallowCopyForFinalization "OBSOLETE INTERFACE: use #executor. This is used to aquire a copy to be used for finalization - (the copy will be sent a #finalize message; see the documentation in the Registry class) This method can be redefined for more efficient copying - especially for large objects." ^ self shallowCopy ! unregisterForFinalization "unregister mySelf from later finalization" self finalizationLobby unregister:self ! ! !Object methodsFor:'initialization'! initialize "just to ignore initialize to objects which do not need it" ^ self ! ! !Object methodsFor:'inspecting'! inspectorClass "{ Pragma: +optSpace }" "return the class to use for inspect. Can (should) be redefined in classes for which a better inspector is available" ^ Inspector ? InspectorView "Modified: / 08-03-2012 / 16:09:38 / cg" ! ! !Object methodsFor:'interrupt handling'! childSignalInterrupt "death of a child process (unix process) - do nothing" ^ self ! customInterrupt "{ Pragma: +optSpace }" "a custom interrupt - but no handler has defined" self error:'custom interrupt' mayProceed:true ! errorInterrupt:errorID with:aParameter "subsystem error. The arguments errorID and aParameter are the values passed to the 'errorInterruptWithIDAndParameter(id, param)' function, which can be called from C subsystems to raise an (asynchronous) error exception. Currently, this is used to map XErrors to smalltalk errors, but can be used from other C subsystems too, to upcast errors. Especially, for subsystems which call errorHandler functions asynchronously. IDs (currently) used: #DisplayError ..... x-error interrupt #XtError ..... xt-error interrupt (Xt interface is not yet published) " |handlers handler| handlers := ObjectMemory registeredErrorInterruptHandlers. handlers notNil ifTrue:[ handler := handlers at:errorID ifAbsent:nil. handler notNil ifTrue:[ "/ "/ handler found; let it do whatever it wants ... "/ handler errorInterrupt:errorID with:aParameter. ^ self ]. ]. "/ "/ no handler - raise errorSignal passing the errorId as parameter "/ ^ Error raiseRequestWith:errorID errorString:('Subsystem error. ErrorID = ' , errorID printString) ! exceptionInterrupt "{ Pragma: +optSpace }" "exception interrupt - enter debugger" self error:'exception Interrupt' mayProceed:true ! fpExceptionInterrupt "{ Pragma: +optSpace }" "a floating point exception occured - this one has to be handled differently since it comes asynchronous on some machines (for example, on machines with a separate FPU or superscalar architectures. Also, errors from within primitive code (or library functions such as GL) are sent via the Unix-signal mechanism this way." |where rec| where := thisContext sender. rec := where receiver. rec isNumber ifTrue:[ ^ rec class raise:#domainErrorSignal receiver:rec selector:where selector arguments:(where args asArray) errorString:'floating point exception' ]. "/ could be in some C-library ... ^ DomainError raise ! internalError:msg "{ Pragma: +optSpace }" "this is triggered, when VM hits some bad error, such as corrupted class, corrupted method/selector array etc. The argument string gives some more information on what happened. (for example, if you set an objects class to a non-behavior, nil etc.). Its not guaranteed, that the system is in a working condition once this error occurred ...." VMInternalError raiseWith:self errorString:msg ! ioInterrupt "{ Pragma: +optSpace }" "I/O (SIGIO/SIGPOLL) interrupt (supposed to be sent to Processor). If we arrive here, there is either no handler (ObjMem>>ioInterruptHandler) or it does not understand the ioInterrupt message. In any case, this is a sign of some big trouble. Enter debugger." self error:'I/O Interrupt - but no handler' mayProceed:true ! memoryInterrupt "{ Pragma: +optSpace }" "out-of-memory interrupt and no handler - enter debugger" self error:'almost out of memory' mayProceed:true ! recursionInterrupt "{ Pragma: +optSpace }" "recursion limit (actually: stack overflow) interrupt. This interrupt is triggered, when a process stack grows above its stackLimit - usually, this leads into the debugger, but could be caught. Under Unix, the stackLimit may be increased in the handler, and the exception can be resumed. Sorry, but under win32, the stack cannot grow, and the exception is not proceedable. At the time we arrive here, the system has still some stack as a reserve so we can continue to do some useful work, or cleanup, or debug for a while. If the signal is ignored, and the stack continues to grow, there will be a few more chances (and more interrupts) before the VM terminates the process." |con remaining sender nSkipped| (con := thisContext) isRecursive ifFalse:[ "/ Processor activeProcess usedStackSize < Processor activeProcess maximumStackSize ifTrue:[ "/ "/ mhmh - it hit me, but I am not responsible ... "/ 'Stray recursionInterrupt ...' infoPrintCR. "/ ^ self "/ ]. ObjectMemory infoPrinting ifTrue:[ 'Object [info]: recursionInterrupt from:' printCR. con := con sender. remaining := 50. [con notNil and:[remaining > 0]] whileTrue:[ sender := con sender. '| ' print. con fullPrint. nSkipped := 0. [sender notNil and:[sender sender notNil and:[sender selector == con selector and:[sender sender selector == con selector and:[sender method == con method]]]]] whileTrue:[ nSkipped := nSkipped + 1. con := sender. sender := con sender. ]. nSkipped > 0 ifTrue:[ '| ... ***** ' print. nSkipped print. ' recursive contexts skipped *****' printCR. ]. con := sender. remaining := remaining - 1 ]. ]. ^ RecursionInterruptSignal raiseSignal ] "Modified: / 10.11.2001 / 15:15:56 / cg" ! schedulerInterrupt "{ Pragma: +optSpace }" "scheduler interrupt (supposed to be sent to Processor). If we arrive here, either the Processor does not understand it, or it has been set to nil. In any case, this is a sign of some big trouble. Enter debugger." self error:'schedulerInterrupt - but no Processor' mayProceed:true ! signalInterrupt:signalNumber "{ Pragma: +optSpace }" "unix signal occured - some signals are handled as Smalltalk Exceptions (SIGPIPE), others (SIGBUS) are rather fatal... In any case, IF a smalltalk-signal has been connected to the OS signal, that one is raised. Otherwise, a dialog is shown, asking the user on how to handle the signal. TODO: add another argument, giving more detailed signal info (PC, VADDR, exact cause etc.). This helps if segvs occur in primitive code. Currently (temporary kludge), these are passed as global variables." |name here sig fatal titles actions badContext msg pc addr action title screen| thisContext isRecursive ifTrue:[ 'Severe error: signalInterrupt while processing a signalInterrupt.' errorPrintCR. 'Terminating process ' errorPrint. Processor activeProcess errorPrintCR. "/ GenericException handle:[:ex | "/ "/ ignore any error during termination "/ ] do:[ "/ Processor activeProcess terminate. "/ ]. Processor activeProcess terminateNoSignal. ]. "if there has been an ST-signal installed, use it ..." sig := OperatingSystem operatingSystemSignal:signalNumber. sig notNil ifTrue:[ sig raiseSignalWith:signalNumber. ^ self. ]. "/ if handled, raise OSSignalInterruptSignal OSSignalInterrupt isHandled ifTrue:[ OSSignalInterrupt raiseRequestWith:signalNumber. ^ self. ]. " special cases - SIGPWR: power failure - write a crash image and continue - SIGHUP: hang up - write a crash image and exit " (signalNumber == OperatingSystem sigPWR) ifTrue:[ SnapshotError ignoreIn:[ObjectMemory writeCrashImage]. ^ self. ]. (signalNumber == OperatingSystem sigHUP) ifTrue:[ SnapshotError ignoreIn:[ObjectMemory writeCrashImage]. 'Object [info]: exit due to hangup signal.' errorPrintCR. Smalltalk exit:1. ]. name := OperatingSystem nameForSignal:signalNumber. "if there is no screen at all, bring up a mini debugger" (Screen isNil or:[(screen := Screen current) isNil or:[(screen := Screen default) isNil or:[screen isOpen not]]]) ifTrue:[ ^ self startMiniDebuggerOrExit:'OS-Signal (' , name, ')'. ]. "ungrab - in case it happened in a box/popupview otherwise display stays locked" screen ungrabPointer; ungrabKeyboard. here := thisContext. badContext := here sender. "the context, in which the signal occurred" "there is a screen. use it to bring up a box asking for what to do ..." Screen currentScreenQuerySignal answer:screen do:[ " SIGBUS, SIGSEGV and SIGILL do not make sense to ignore (i.e. continue) since the system will retry the faulty instruction, which leads to another signal - to avoid frustration, better not offer this option. " fatal := OperatingSystem isFatalSignal:signalNumber. fatal ifTrue:[ (Debugger isNil or:[here isRecursive]) ifTrue:[ 'Object [hard error]: signal ' errorPrint. signalNumber errorPrintCR. ^ self startMiniDebuggerOrExit:'OS-Signal (' , name, ')'. ]. " a hard signal - go into debugger immediately " msg := 'OS-signal: ', name. "/ the IRQ-PC is passed as low-hi, to avoid the need "/ to allocate a LargeInteger in the VM during signal "/ time. I know, this is ugly. InterruptPcLow notNil ifTrue:[ pc := InterruptPcLow + (InterruptPcHi bitShift:((SmallInteger maxBits + 1) // 2)). pc ~~ 0 ifTrue:[ msg := msg , ' PC=' , (pc printStringRadix:16) ]. ]. InterruptAddrLow notNil ifTrue:[ addr := InterruptAddrLow + (InterruptAddrHi bitShift:((SmallInteger maxBits + 1) // 2)). addr ~~ 0 ifTrue:[ msg := msg , ' ADDR=' , (addr printStringRadix:16) ]. ]. Debugger enter:here withMessage:msg mayProceed:false. "unreachable" ^ nil. ]. "if possible, open an option box asking the user what do. Otherwise, start a debugger" Dialog notNil ifTrue:[ titles := #('save crash image' 'dump core' 'exit ST/X' 'debug'). actions := #(save core exit debug). action := nil. title := 'OS Signal caught (' , name, ')'. title := (title , '\[in ST-process: ' , Processor activeProcess nameOrId ,']') withCRs. "/ if cought while in the scheduler or event dispatcher, "/ a modal dialog is not possible ... "/ (therefore, abort & return does not makes sense) Processor activeProcess isSystemProcess ifFalse:[ titles := #('abort') , titles. actions := #(abort), actions. badContext canReturn ifTrue:[ titles := #('return') , titles. actions := #(return), actions. ]. ]. fatal ifFalse:[ titles := titles, #('ignore'). actions := actions , #(ignore). ]. action := Dialog choose:title labels:titles values:actions default:(fatal ifTrue:[nil] ifFalse:[#ignore]). "Dialog may fail (if system process), default action is debug" action isEmptyOrNil ifTrue:[action := #debug]. ] ifFalse:[ action := #debug. ]. action == #save ifTrue:[ ObjectMemory writeCrashImage ]. action == #core ifTrue:[ Smalltalk fatalAbort ]. action == #exit ifTrue:[ Smalltalk exit ]. action == #return ifTrue:[ badContext return ]. action == #abort ifTrue:[ AbortOperationRequest raise. ]. action == #debug ifTrue:[ Debugger isNil ifTrue:[ ^ self startMiniDebuggerOrExit:'OS-Signal (' , name, ')'. ]. Debugger enter:here withMessage:('OS-Signal ', name) mayProceed:true. ]. "action == #ignore" ]. "Modified: / 15-09-2011 / 16:38:14 / cg" ! spyInterrupt "{ Pragma: +optSpace }" "spy interrupt and no handler - enter debugger" self error:'spy Interrupt - but no handler' mayProceed:true ! startMiniDebuggerOrExit:text "some critical condition happened. Start a mini debugger or exit if none is present" MiniDebugger isNil ifTrue:[ "a system without debugging facilities (i.e. a standalone system) output a message and exit." ('Object [error]: exit due to ', text, ' - and no debugger.') errorPrintCR. OperatingSystem exit:99. ]. MiniDebugger enterWithMessage:text mayProceed:true. ! timerInterrupt "{ Pragma: +optSpace }" "timer interrupt and no handler - enter debugger" self error:'timer Interrupt - but no handler' mayProceed:true ! userInterrupt "{ Pragma: +optSpace }" "user (^c) interrupt. This is typically sent by the VM, when a ctrl-C is typed at the controlling tty (i.e. in the xterm)." UserInterruptSignal raiseRequest ! userInterruptIn:aContext "{ Pragma: +optSpace }" "user (^c) interrupt - enter debugger, but show aContext as top-context. This is used to hide any intermediate scheduler contexts, in case of an interrupted process. Typically, this is sent by the WindowGroup, when a keyboardEvent for the ctrl-C key is processed." UserInterruptSignal raiseRequestWith:nil errorString:nil in:aContext "Created: / 18.10.1996 / 20:46:04 / cg" "Modified: / 20.10.1996 / 13:06:38 / cg" "Modified: / 26.7.1999 / 10:58:49 / stefan" ! ! !Object methodsFor:'message sending'! perform:aSelector "send the message aSelector to the receiver" %{ REGISTER OBJ sel = aSelector; if (InterruptPending == nil) { struct inlineCache *pIlc; /* JV @ 2010-22-07: To improve performance I use 256 ILCs instead of default 4. This significantly reduces ILC misses. The code should be further optimized by remembering last selector index and try a first shot on that index. Another option is to use kind of hashing on lower bits of sel variable. However, a more detailed statistical data should be gathered before doing further optimizations. */ #define SEL_AND_ILC_INIT_1(l) { nil , __ILCPERF0(l) } #define SEL_AND_ILC_INIT_2(l) SEL_AND_ILC_INIT_1(l) , SEL_AND_ILC_INIT_1(l) #define SEL_AND_ILC_INIT_4(l) SEL_AND_ILC_INIT_2(l) , SEL_AND_ILC_INIT_2(l) #define SEL_AND_ILC_INIT_8(l) SEL_AND_ILC_INIT_4(l) , SEL_AND_ILC_INIT_4(l) #define SEL_AND_ILC_INIT_16(l) SEL_AND_ILC_INIT_8(l) , SEL_AND_ILC_INIT_8(l) #define SEL_AND_ILC_INIT_32(l) SEL_AND_ILC_INIT_16(l) , SEL_AND_ILC_INIT_16(l) #define SEL_AND_ILC_INIT_32(l) SEL_AND_ILC_INIT_16(l) , SEL_AND_ILC_INIT_16(l) #define SEL_AND_ILC_INIT_64(l) SEL_AND_ILC_INIT_32(l) , SEL_AND_ILC_INIT_32(l) #define SEL_AND_ILC_INIT_128(l) SEL_AND_ILC_INIT_64(l) , SEL_AND_ILC_INIT_64(l) #define SEL_AND_ILC_INIT_256(l) SEL_AND_ILC_INIT_128(l) , SEL_AND_ILC_INIT_128(l) #define nilcs 256 static struct { OBJ sel; struct inlineCache ilc; } sel_and_ilc[nilcs] = { SEL_AND_ILC_INIT_256(29) }; #undef SEL_AND_ILC_INIT_1 #undef SEL_AND_ILC_INIT_2 #undef SEL_AND_ILC_INIT_4 #undef SEL_AND_ILC_INIT_8 #undef SEL_AND_ILC_INIT_16 #undef SEL_AND_ILC_INIT_32 #undef SEL_AND_ILC_INIT_64 #undef SEL_AND_ILC_INIT_128 #undef SEL_AND_ILC_INIT_256 static flip = 0; int i; for (i = 0; i < nilcs; i++) { if (sel == sel_and_ilc[i].sel) { pIlc = &sel_and_ilc[i].ilc; goto perform0_send_and_return; } } /*printf("Object >> #perform: #%s --> no PIC found\n", __symbolVal(aSelector));*/ pIlc = &sel_and_ilc[flip].ilc; sel_and_ilc[flip].sel = sel; flip = (flip + 1) % nilcs; pIlc->ilc_func = __SEND0ADDR__; if (pIlc->ilc_poly) { __flushPolyCache(pIlc->ilc_poly); pIlc->ilc_poly = 0; } perform0_send_and_return: RETURN ( (*(pIlc->ilc_func))(self, sel, nil, pIlc) ); } else { static struct inlineCache ilc0 = __DUMMYILCSELF0(@line+1); RETURN (_SEND0(self, aSelector, nil, &ilc0)); } %}. ^ self perform:aSelector withArguments:#() ! perform:aSelector inClass:aClass withArguments:argArray "send the message aSelector with all args taken from argArray to the receiver as a super-send message. This is actually more flexible than the normal super-send, since it allows to execute a method in ANY superclass of the receiver (not just the immediate superclass). Thus, it is (theoretically) possible to do '5 perform:#< inClass:Magnitude withArguments:#(6)' and evaluate Magnitudes compare method even if there was one in Number. This method is used by the interpreter to evaluate super sends and could be used for very special behavior (language extension ?). WARNING: this is an ST/X feature - probably not found in other smalltalks." |numberOfArgs a1 a2 a3 a4 a5 a6 a7 a8 a9 a10 a11 a12 a13 a14 a15 myClass| " check, if aClass is really a superclass of the receiver " myClass := self class. (myClass == aClass or:[myClass isSubclassOf:aClass]) ifFalse:[ self error:'lookup-class argument is not a superclass of the receiver'. ^ nil ]. %{ REGISTER OBJ *argP; int nargs, i; if (__isArrayLike(argArray)) { nargs = __arraySize(argArray); argP = __arrayVal(argArray); } else { if (__isNonNilObject(argArray)) { static struct inlineCache ilcSize = __ILC0(@line+1); numberOfArgs = (*ilcSize.ilc_func)(argArray, @symbol(size), nil, &ilcSize); if (!__isSmallInteger(numberOfArgs)) goto bad; nargs = __intVal(numberOfArgs); argP = (OBJ *)(&a1); for (i=1; i <= nargs; i++) { *argP++ = __AT_(argArray, __mkSmallInteger(i)); } argP = (OBJ *)(&a1); } else { nargs = 0; } } switch (nargs) { case 0: { static struct inlineCache ilc0 = __DUMMYILCSELF0(@line+1); RETURN ( _SEND0(self, aSelector, aClass, &ilc0)); } case 1: { static struct inlineCache ilc1 = __DUMMYILCSELF1(@line+1); RETURN ( _SEND1(self, aSelector, aClass, &ilc1, argP[0])); } case 2: { static struct inlineCache ilc2 = __DUMMYILCSELF2(@line+1); RETURN ( _SEND2(self, aSelector, aClass, &ilc2, argP[0], argP[1])); } case 3: { static struct inlineCache ilc3 = __DUMMYILCSELF3(@line+1); RETURN ( _SEND3(self, aSelector, aClass, &ilc3, argP[0], argP[1], argP[2])); } case 4: { static struct inlineCache ilc4 = __DUMMYILCSELF4(@line+1); RETURN ( _SEND4(self, aSelector, aClass, &ilc4, argP[0], argP[1], argP[2], argP[3])); } case 5: { static struct inlineCache ilc5 = __DUMMYILCSELF5(@line+1); RETURN ( _SEND5(self, aSelector, aClass, &ilc5, argP[0], argP[1], argP[2], argP[3], argP[4])); } case 6: { static struct inlineCache ilc6 = __DUMMYILCSELF6(@line+1); RETURN ( _SEND6(self, aSelector, aClass, &ilc6, argP[0], argP[1], argP[2], argP[3], argP[4], argP[5])); } case 7: { static struct inlineCache ilc7 = __DUMMYILCSELF7(@line+1); RETURN ( _SEND7(self, aSelector, aClass, &ilc7, argP[0], argP[1], argP[2], argP[3], argP[4], argP[5], argP[6])); } case 8: { static struct inlineCache ilc8 = __DUMMYILCSELF8(@line+1); RETURN ( _SEND8(self, aSelector, aClass, &ilc8, argP[0], argP[1], argP[2], argP[3], argP[4], argP[5], argP[6], argP[7])); } case 9: { static struct inlineCache ilc9 = __DUMMYILCSELF9(@line+1); RETURN ( _SEND9(self, aSelector, aClass, &ilc9, argP[0], argP[1], argP[2], argP[3], argP[4], argP[5], argP[6], argP[7], argP[8])); } case 10: { static struct inlineCache ilc10 = __DUMMYILCSELF10(@line+1); RETURN ( _SEND10(self, aSelector, aClass, &ilc10, argP[0], argP[1], argP[2], argP[3], argP[4], argP[5], argP[6], argP[7], argP[8], argP[9])); } case 11: { static struct inlineCache ilc11 = __DUMMYILCSELF11(@line+1); RETURN ( _SEND11(self, aSelector, aClass, &ilc11, argP[0], argP[1], argP[2], argP[3], argP[4], argP[5], argP[6], argP[7], argP[8], argP[9], argP[10])); } case 12: { static struct inlineCache ilc12 = __DUMMYILCSELF12(@line+1); RETURN ( _SEND12(self, aSelector, aClass, &ilc12, argP[0], argP[1], argP[2], argP[3], argP[4], argP[5], argP[6], argP[7], argP[8], argP[9], argP[10], argP[11])); } case 13: { static struct inlineCache ilc13 = __DUMMYILCSELF13(@line+1); RETURN ( _SEND13(self, aSelector, aClass, &ilc13, argP[0], argP[1], argP[2], argP[3], argP[4], argP[5], argP[6], argP[7], argP[8], argP[9], argP[10], argP[11], argP[12])); } case 14: { static struct inlineCache ilc14 = __DUMMYILCSELF14(@line+1); RETURN ( _SEND14(self, aSelector, aClass, &ilc14, argP[0], argP[1], argP[2], argP[3], argP[4], argP[5], argP[6], argP[7], argP[8], argP[9], argP[10], argP[11], argP[12], argP[13])); } case 15: { static struct inlineCache ilc15 = __DUMMYILCSELF15(@line+1); RETURN ( _SEND15(self, aSelector, aClass, &ilc15, argP[0], argP[1], argP[2], argP[3], argP[4], argP[5], argP[6], argP[7], argP[8], argP[9], argP[10], argP[11], argP[12], argP[13], argP[14])); } #ifdef _SEND16 case 16: { static struct inlineCache ilc16 = __DUMMYILCSELF16(@line+1); RETURN ( _SEND16(self, aSelector, aClass, &ilc15, argP[0], argP[1], argP[2], argP[3], argP[4], argP[5], argP[6], argP[7], argP[8], argP[9], argP[10], argP[11], argP[12], argP[13], argP[14], argP[15])); } #endif #ifdef _SEND17 case 17: { static struct inlineCache ilc17 = __DUMMYILCSELF17(@line+1); RETURN ( _SEND17(self, aSelector, aClass, &ilc15, argP[0], argP[1], argP[2], argP[3], argP[4], argP[5], argP[6], argP[7], argP[8], argP[9], argP[10], argP[11], argP[12], argP[13], argP[14], argP[15], argP[16])); } #endif } bad:; %}. "/ arrive here, if bad number of arguments (too many) "/ ST/X (currently) only allows up to 15 method arguments ^ self primitiveFailed ! perform:aSelector with:arg "send the one-arg-message aSelector to the receiver" %{ REGISTER OBJ sel = aSelector; if (InterruptPending == nil) { struct inlineCache *pIlc; /* JV @ 2010-22-07: To improve performance I use 256 ILCs instead of default 4. For details, see comment in perform: */ #define SEL_AND_ILC_INIT_1(l) { nil , __ILCPERF1(l) } #define SEL_AND_ILC_INIT_2(l) SEL_AND_ILC_INIT_1(l) , SEL_AND_ILC_INIT_1(l) #define SEL_AND_ILC_INIT_4(l) SEL_AND_ILC_INIT_2(l) , SEL_AND_ILC_INIT_2(l) #define SEL_AND_ILC_INIT_8(l) SEL_AND_ILC_INIT_4(l) , SEL_AND_ILC_INIT_4(l) #define SEL_AND_ILC_INIT_16(l) SEL_AND_ILC_INIT_8(l) , SEL_AND_ILC_INIT_8(l) #define SEL_AND_ILC_INIT_32(l) SEL_AND_ILC_INIT_16(l) , SEL_AND_ILC_INIT_16(l) #define SEL_AND_ILC_INIT_32(l) SEL_AND_ILC_INIT_16(l) , SEL_AND_ILC_INIT_16(l) #define SEL_AND_ILC_INIT_64(l) SEL_AND_ILC_INIT_32(l) , SEL_AND_ILC_INIT_32(l) #define SEL_AND_ILC_INIT_128(l) SEL_AND_ILC_INIT_64(l) , SEL_AND_ILC_INIT_64(l) #define SEL_AND_ILC_INIT_256(l) SEL_AND_ILC_INIT_128(l) , SEL_AND_ILC_INIT_128(l) #define nilcs 256 static struct { OBJ sel; struct inlineCache ilc; } sel_and_ilc[nilcs] = { SEL_AND_ILC_INIT_256(29) }; #undef SEL_AND_ILC_INIT_1 #undef SEL_AND_ILC_INIT_2 #undef SEL_AND_ILC_INIT_4 #undef SEL_AND_ILC_INIT_8 #undef SEL_AND_ILC_INIT_16 #undef SEL_AND_ILC_INIT_32 #undef SEL_AND_ILC_INIT_64 #undef SEL_AND_ILC_INIT_128 #undef SEL_AND_ILC_INIT_256 static flip = 0; int i; for (i = 0; i < nilcs; i++) { if (sel == sel_and_ilc[i].sel) { pIlc = &sel_and_ilc[i].ilc; goto perform1_send_and_return; } } /*printf("Object >> #perform: #%s with: arg --> no PIC found\n", __symbolVal(aSelector));*/ pIlc = &sel_and_ilc[flip].ilc; sel_and_ilc[flip].sel = sel; flip = (flip + 1) % nilcs; pIlc->ilc_func = __SEND1ADDR__; if (pIlc->ilc_poly) { __flushPolyCache(pIlc->ilc_poly); pIlc->ilc_poly = 0; } perform1_send_and_return: RETURN ( (*(pIlc->ilc_func))(self, sel, nil, pIlc, arg) ); } else { static struct inlineCache ilc1 = __DUMMYILCSELF1(@line+1); RETURN (_SEND1(self, aSelector, nil, &ilc1, arg)); } %}. ^ self perform:aSelector withArguments:(Array with:arg) ! perform:aSelector with:arg1 with:arg2 "send the two-arg-message aSelector to the receiver" %{ REGISTER OBJ sel = aSelector; struct inlineCache *pIlc; if (InterruptPending == nil) { /* JV @ 2010-22-07: To improve performance I use 256 ILCs instead of default 4. For details, see comment in perform: */ #define SEL_AND_ILC_INIT_1(l) { nil , __ILCPERF2(l) } #define SEL_AND_ILC_INIT_2(l) SEL_AND_ILC_INIT_1(l) , SEL_AND_ILC_INIT_1(l) #define SEL_AND_ILC_INIT_4(l) SEL_AND_ILC_INIT_2(l) , SEL_AND_ILC_INIT_2(l) #define SEL_AND_ILC_INIT_8(l) SEL_AND_ILC_INIT_4(l) , SEL_AND_ILC_INIT_4(l) #define SEL_AND_ILC_INIT_16(l) SEL_AND_ILC_INIT_8(l) , SEL_AND_ILC_INIT_8(l) #define SEL_AND_ILC_INIT_32(l) SEL_AND_ILC_INIT_16(l) , SEL_AND_ILC_INIT_16(l) #define SEL_AND_ILC_INIT_32(l) SEL_AND_ILC_INIT_16(l) , SEL_AND_ILC_INIT_16(l) #define SEL_AND_ILC_INIT_64(l) SEL_AND_ILC_INIT_32(l) , SEL_AND_ILC_INIT_32(l) #define SEL_AND_ILC_INIT_128(l) SEL_AND_ILC_INIT_64(l) , SEL_AND_ILC_INIT_64(l) #define SEL_AND_ILC_INIT_256(l) SEL_AND_ILC_INIT_128(l) , SEL_AND_ILC_INIT_128(l) #define nilcs 256 static struct { OBJ sel; struct inlineCache ilc; } sel_and_ilc[nilcs] = { SEL_AND_ILC_INIT_256(29) }; #undef SEL_AND_ILC_INIT_1 #undef SEL_AND_ILC_INIT_2 #undef SEL_AND_ILC_INIT_4 #undef SEL_AND_ILC_INIT_8 #undef SEL_AND_ILC_INIT_16 #undef SEL_AND_ILC_INIT_32 #undef SEL_AND_ILC_INIT_64 #undef SEL_AND_ILC_INIT_128 #undef SEL_AND_ILC_INIT_256 static flip = 0; int i; for (i = 0; i < nilcs; i++) { if (sel == sel_and_ilc[i].sel) { pIlc = &sel_and_ilc[i].ilc; goto perform2_send_and_return; } } /*printf("Object >> #perform: #%s with: with: --> no PIC found\n", __symbolVal(aSelector));*/ pIlc = &sel_and_ilc[flip].ilc; sel_and_ilc[flip].sel = sel; flip = (flip + 1) % nilcs; pIlc->ilc_func = __SEND2ADDR__; if (pIlc->ilc_poly) { __flushPolyCache(pIlc->ilc_poly); pIlc->ilc_poly = 0; } perform2_send_and_return: RETURN ( (*(pIlc->ilc_func))(self, aSelector, nil, pIlc, arg1, arg2) ); } else { static struct inlineCache ilc2 = __DUMMYILCSELF2(@line+1); RETURN (_SEND2(self, aSelector, nil, &ilc2, arg1, arg2)); } %}. ^ self perform:aSelector withArguments:(Array with:arg1 with:arg2) ! perform:aSelector with:arg1 with:arg2 with:arg3 "send the three-arg-message aSelector to the receiver" %{ struct inlineCache *pIlc; static struct inlineCache ilc_0 = __ILCPERF3(@line); static struct inlineCache ilc_1 = __ILCPERF3(@line); static OBJ last_0 = nil; static OBJ last_1 = nil; static flip = 0; if (InterruptPending == nil) { if (aSelector != last_0) { if (aSelector != last_1) { if (flip) { pIlc = &ilc_0; flip = 0; last_0 = aSelector; } else { pIlc = &ilc_1; flip = 1; last_1 = aSelector; } pIlc->ilc_func = __SEND3ADDR__; if (pIlc->ilc_poly) { __flushPolyCache(pIlc->ilc_poly); pIlc->ilc_poly = 0; } } else { pIlc = &ilc_1; } } else { pIlc = &ilc_0; } RETURN ( (*(pIlc->ilc_func))(self, aSelector, nil, pIlc, arg1, arg2, arg3) ); } else { static struct inlineCache ilc3 = __DUMMYILCSELF3(@line+1); RETURN (_SEND3(self, aSelector, nil, &ilc3, arg1, arg2, arg3)); } %}. ^ self perform:aSelector withArguments:(Array with:arg1 with:arg2 with:arg3) ! perform:aSelector with:arg1 with:arg2 with:arg3 with:arg4 "send the four-arg-message aSelector to the receiver" %{ struct inlineCache *pIlc; static struct inlineCache ilc_0 = __ILCPERF4(@line); static struct inlineCache ilc_1 = __ILCPERF4(@line); static OBJ last_0 = nil; static OBJ last_1 = nil; static flip = 0; if (InterruptPending == nil) { if (aSelector != last_0) { if (aSelector != last_1) { if (flip) { pIlc = &ilc_0; flip = 0; last_0 = aSelector; } else { pIlc = &ilc_1; flip = 1; last_1 = aSelector; } pIlc->ilc_func = __SEND4ADDR__; if (pIlc->ilc_poly) { __flushPolyCache(pIlc->ilc_poly); pIlc->ilc_poly = 0; } } else { pIlc = &ilc_1; } } else { pIlc = &ilc_0; } RETURN ( (*(pIlc->ilc_func))(self, aSelector, nil, pIlc, arg1, arg2, arg3, arg4) ); } else { static struct inlineCache ilc4 = __DUMMYILCSELF4(@line+1); RETURN (_SEND4(self, aSelector, nil, &ilc4, arg1, arg2, arg3, arg4)); } %}. ^ self perform:aSelector withArguments:(Array with:arg1 with:arg2 with:arg3 with:arg4) ! perform:aSelector with:arg1 with:arg2 with:arg3 with:arg4 with:arg5 "send the five-arg-message aSelector to the receiver" %{ struct inlineCache *pIlc; static struct inlineCache ilc_0 = __ILCPERF5(@line); static struct inlineCache ilc_1 = __ILCPERF5(@line); static OBJ last_0 = nil; static OBJ last_1 = nil; static flip = 0; if (InterruptPending == nil) { if (aSelector != last_0) { if (aSelector != last_1) { if (flip) { pIlc = &ilc_0; flip = 0; last_0 = aSelector; } else { pIlc = &ilc_1; flip = 1; last_1 = aSelector; } pIlc->ilc_func = __SEND5ADDR__; if (pIlc->ilc_poly) { __flushPolyCache(pIlc->ilc_poly); pIlc->ilc_poly = 0; } } else { pIlc = &ilc_1; } } else { pIlc = &ilc_0; } RETURN ( (*(pIlc->ilc_func))(self, aSelector, nil, pIlc, arg1, arg2, arg3, arg4, arg5) ); } else { static struct inlineCache ilc5 = __DUMMYILCSELF5(@line+1); RETURN (_SEND5(self, aSelector, nil, &ilc5, arg1, arg2, arg3, arg4, arg5)); } %}. ^ self perform:aSelector withArguments:(Array with:arg1 with:arg2 with:arg3 with:arg4 with:arg5) ! perform:aSelector with:arg1 with:arg2 with:arg3 with:arg4 with:arg5 with:arg6 "send the six-arg-message aSelector to the receiver" %{ struct inlineCache *pIlc; static struct inlineCache ilc_0 = __ILCPERF6(@line); static struct inlineCache ilc_1 = __ILCPERF6(@line); static OBJ last_0 = nil; static OBJ last_1 = nil; static flip = 0; if (InterruptPending == nil) { if (aSelector != last_0) { if (aSelector != last_1) { if (flip) { pIlc = &ilc_0; flip = 0; last_0 = aSelector; } else { pIlc = &ilc_1; flip = 1; last_1 = aSelector; } pIlc->ilc_func = __SEND6ADDR__; if (pIlc->ilc_poly) { __flushPolyCache(pIlc->ilc_poly); pIlc->ilc_poly = 0; } } else { pIlc = &ilc_1; } } else { pIlc = &ilc_0; } RETURN ( (*(pIlc->ilc_func))(self, aSelector, nil, pIlc, arg1, arg2, arg3, arg4, arg5, arg6) ); } else { static struct inlineCache ilc6 = __DUMMYILCSELF6(@line+1); RETURN (_SEND6(self, aSelector, nil, &ilc6, arg1, arg2, arg3, arg4, arg5, arg6)); } %}. ^ self perform:aSelector withArguments:(Array with:arg1 with:arg2 with:arg3 with:arg4 with:arg5 with:arg6) ! perform:aSelector withArguments:argArray "send the message aSelector with all args taken from argArray to the receiver." |numberOfArgs a1 a2 a3 a4 a5 a6 a7 a8 a9 a10 a11 a12 a13 a14 a15| %{ REGISTER OBJ *argP; int nargs; OBJ l; if (__isArrayLike(argArray)) { nargs = __arraySize(argArray); argP = __arrayVal(argArray); } else { if (__isNonNilObject(argArray)) { static struct inlineCache ilcSize = __ILC0(@line); int i; numberOfArgs = (*ilcSize.ilc_func)(argArray, @symbol(size), nil, &ilcSize); if (!__isSmallInteger(numberOfArgs)) goto bad; nargs = __intVal(numberOfArgs); argP = (OBJ *)(&a1); for (i=1; i <= nargs; i++) { *argP++ = __AT_(argArray, __mkSmallInteger(i)); } argP = (OBJ *)(&a1); } else { nargs = 0; } } switch (nargs) { case 0: if (InterruptPending == nil) { static OBJ last0_0 = nil; static struct inlineCache ilc0_0 = __ILCPERF0(@line); static OBJ last0_1 = nil; static struct inlineCache ilc0_1 = __ILCPERF0(@line); static OBJ last0_2 = nil; static struct inlineCache ilc0_2 = __ILCPERF0(@line); static OBJ last0_3 = nil; static struct inlineCache ilc0_3 = __ILCPERF0(@line); static int flip0 = 0; struct inlineCache *pIlc; if (aSelector == last0_0) { pIlc = &ilc0_0; } else if (aSelector == last0_1) { pIlc = &ilc0_1; } else if (aSelector == last0_2) { pIlc = &ilc0_2; } else if (aSelector == last0_3) { pIlc = &ilc0_3; } else { if (flip0 == 0) { pIlc = &ilc0_0; flip0 = 1; last0_0 = aSelector; } else if (flip0 == 1) { pIlc = &ilc0_1; flip0 = 2; last0_1 = aSelector; } else if (flip0 == 2) { pIlc = &ilc0_2; flip0 = 3; last0_2 = aSelector; } else { pIlc = &ilc0_3; flip0 = 0; last0_3 = aSelector; } pIlc->ilc_func = __SEND0ADDR__; if (pIlc->ilc_poly) { __flushPolyCache(pIlc->ilc_poly); pIlc->ilc_poly = 0; } } RETURN ((*pIlc->ilc_func)(self, aSelector, nil, pIlc)); } else { static struct inlineCache ilc0 = __DUMMYILCSELF0(@line+1); RETURN (_SEND0(self, aSelector, nil, &ilc0)); } case 1: if (InterruptPending == nil) { static OBJ last1_0 = nil; static struct inlineCache ilc1_0 = __ILCPERF1(@line); static OBJ last1_1 = nil; static struct inlineCache ilc1_1 = __ILCPERF1(@line); static OBJ last1_2 = nil; static struct inlineCache ilc1_2 = __ILCPERF1(@line); static OBJ last1_3 = nil; static struct inlineCache ilc1_3 = __ILCPERF1(@line); static int flip1 = 0; struct inlineCache *pIlc; if (aSelector == last1_0) { pIlc = &ilc1_0; } else if (aSelector == last1_1) { pIlc = &ilc1_1; } else if (aSelector == last1_2) { pIlc = &ilc1_2; } else if (aSelector == last1_3) { pIlc = &ilc1_3; } else { if (flip1 == 0) { pIlc = &ilc1_0; flip1 = 1; last1_0 = aSelector; } else if (flip1 == 1) { pIlc = &ilc1_1; flip1 = 2; last1_1 = aSelector; } else if (flip1 == 2) { pIlc = &ilc1_2; flip1 = 3; last1_2 = aSelector; } else { pIlc = &ilc1_3; flip1 = 0; last1_3 = aSelector; } pIlc->ilc_func = __SEND1ADDR__; if (pIlc->ilc_poly) { __flushPolyCache(pIlc->ilc_poly); pIlc->ilc_poly = 0; } } RETURN ((*pIlc->ilc_func)(self, aSelector, nil, pIlc, argP[0])); } else { static struct inlineCache ilc1 = __DUMMYILCSELF1(@line+1); RETURN (_SEND1(self, aSelector, nil, &ilc1, argP[0])); } case 2: if (InterruptPending == nil) { static OBJ last2_0 = nil; static struct inlineCache ilc2_0 = __ILCPERF2(@line); static OBJ last2_1 = nil; static struct inlineCache ilc2_1 = __ILCPERF2(@line); static int flip2 = 0; struct inlineCache *pIlc; if (aSelector == last2_0) { pIlc = &ilc2_0; } else if (aSelector == last2_1) { pIlc = &ilc2_1; } else { if (flip2 == 0) { pIlc = &ilc2_0; flip2 = 1; last2_0 = aSelector; } else { pIlc = &ilc2_1; flip2 = 0; last2_1 = aSelector; } pIlc->ilc_func = __SEND2ADDR__; if (pIlc->ilc_poly) { __flushPolyCache(pIlc->ilc_poly); pIlc->ilc_poly = 0; } } RETURN ((*pIlc->ilc_func)(self, aSelector, nil, pIlc, argP[0], argP[1])); } else { static struct inlineCache ilc2 = __DUMMYILCSELF2(@line+1); RETURN (_SEND2(self, aSelector, nil, &ilc2, argP[0], argP[1])); } case 3: if (InterruptPending == nil) { static OBJ last3_0 = nil; static struct inlineCache ilc3_0 = __ILCPERF3(@line); static OBJ last3_1 = nil; static struct inlineCache ilc3_1 = __ILCPERF3(@line); static int flip3 = 0; struct inlineCache *pIlc; if (aSelector == last3_0) { pIlc = &ilc3_0; } else if (aSelector == last3_1) { pIlc = &ilc3_1; } else { if (flip3 == 0) { pIlc = &ilc3_0; flip3 = 1; last3_0 = aSelector; } else { pIlc = &ilc3_1; flip3 = 0; last3_1 = aSelector; } pIlc->ilc_func = __SEND3ADDR__; if (pIlc->ilc_poly) { __flushPolyCache(pIlc->ilc_poly); pIlc->ilc_poly = 0; } } RETURN ((*pIlc->ilc_func)(self, aSelector, nil, pIlc, argP[0], argP[1], argP[2])); } else { static struct inlineCache ilc3 = __DUMMYILCSELF3(@line+1); RETURN (_SEND3(self, aSelector, nil, &ilc3, argP[0], argP[1], argP[2])); } case 4: { static OBJ last4 = nil; static struct inlineCache ilc4 = __ILCPERF4(@line); if ((InterruptPending != nil) || (aSelector != last4)) { ilc4.ilc_func = __SEND4ADDR__; if (ilc4.ilc_poly) { __flushPolyCache(ilc4.ilc_poly); ilc4.ilc_poly = 0; } last4 = aSelector; } RETURN ( (*ilc4.ilc_func)(self, aSelector, nil, &ilc4, argP[0], argP[1], argP[2], argP[3])); } case 5: { static OBJ last5 = nil; static struct inlineCache ilc5 = __ILCPERF5(@line); if ((InterruptPending != nil) || (aSelector != last5)) { ilc5.ilc_func = __SEND5ADDR__; if (ilc5.ilc_poly) { __flushPolyCache(ilc5.ilc_poly); ilc5.ilc_poly = 0; } last5 = aSelector; } RETURN ( (*ilc5.ilc_func)(self, aSelector, nil, &ilc5, argP[0], argP[1], argP[2], argP[3], argP[4])); } case 6: { static OBJ last6 = nil; static struct inlineCache ilc6 = __ILCPERF6(@line); if ((InterruptPending != nil) || (aSelector != last6)) { ilc6.ilc_func = __SEND6ADDR__; if (ilc6.ilc_poly) { __flushPolyCache(ilc6.ilc_poly); ilc6.ilc_poly = 0; } last6 = aSelector; } RETURN ( (*ilc6.ilc_func)(self, aSelector, nil, &ilc6, argP[0], argP[1], argP[2], argP[3], argP[4], argP[5])); } case 7: { static OBJ last7 = nil; static struct inlineCache ilc7 = __ILCPERF7(@line); if ((InterruptPending != nil) || (aSelector != last7)) { ilc7.ilc_func = __SEND7ADDR__; if (ilc7.ilc_poly) { __flushPolyCache(ilc7.ilc_poly); ilc7.ilc_poly = 0; } last7 = aSelector; } RETURN ( (*ilc7.ilc_func)(self, aSelector, nil, &ilc7, argP[0], argP[1], argP[2], argP[3], argP[4], argP[5], argP[6])); } case 8: { static OBJ last8 = nil; static struct inlineCache ilc8 = __ILCPERF8(@line); if ((InterruptPending != nil) || (aSelector != last8)) { ilc8.ilc_func = __SEND8ADDR__; if (ilc8.ilc_poly) { __flushPolyCache(ilc8.ilc_poly); ilc8.ilc_poly = 0; } last8 = aSelector; } RETURN ( (*ilc8.ilc_func)(self, aSelector, nil, &ilc8, argP[0], argP[1], argP[2], argP[3], argP[4], argP[5], argP[6], argP[7])); } case 9: { static OBJ last9 = nil; static struct inlineCache ilc9 = __ILCPERF9(@line); if ((InterruptPending != nil) || (aSelector != last9)) { ilc9.ilc_func = __SEND9ADDR__; if (ilc9.ilc_poly) { __flushPolyCache(ilc9.ilc_poly); ilc9.ilc_poly = 0; } last9 = aSelector; } RETURN ( (*ilc9.ilc_func)(self, aSelector, nil, &ilc9, argP[0], argP[1], argP[2], argP[3], argP[4], argP[5], argP[6], argP[7], argP[8])); } case 10: { static OBJ last10 = nil; static struct inlineCache ilc10 = __ILCPERF10(@line); if ((InterruptPending != nil) || (aSelector != last10)) { ilc10.ilc_func = __SEND10ADDR__; if (ilc10.ilc_poly) { __flushPolyCache(ilc10.ilc_poly); ilc10.ilc_poly = 0; } last10 = aSelector; } RETURN ( (*ilc10.ilc_func)(self, aSelector, nil, &ilc10, argP[0], argP[1], argP[2], argP[3], argP[4], argP[5], argP[6], argP[7], argP[8], argP[9])); } case 11: { static OBJ last11 = nil; static struct inlineCache ilc11 = __ILCPERF11(@line); if ((InterruptPending != nil) || (aSelector != last11)) { ilc11.ilc_func = __SEND11ADDR__; if (ilc11.ilc_poly) { __flushPolyCache(ilc11.ilc_poly); ilc11.ilc_poly = 0; } last11 = aSelector; } RETURN ( (*ilc11.ilc_func)(self, aSelector, nil, &ilc11, argP[0], argP[1], argP[2], argP[3], argP[4], argP[5], argP[6], argP[7], argP[8], argP[9], argP[10])); } case 12: { static OBJ last12 = nil; static struct inlineCache ilc12 = __ILCPERF12(@line); if ((InterruptPending != nil) || (aSelector != last12)) { ilc12.ilc_func = __SEND12ADDR__; if (ilc12.ilc_poly) { __flushPolyCache(ilc12.ilc_poly); ilc12.ilc_poly = 0; } last12 = aSelector; } RETURN ( (*ilc12.ilc_func)(self, aSelector, nil, &ilc12, argP[0], argP[1], argP[2], argP[3], argP[4], argP[5], argP[6], argP[7], argP[8], argP[9], argP[10], argP[11])); } case 13: { static OBJ last13 = nil; static struct inlineCache ilc13 = __ILCPERF13(@line); if ((InterruptPending != nil) || (aSelector != last13)) { ilc13.ilc_func = __SEND13ADDR__; if (ilc13.ilc_poly) { __flushPolyCache(ilc13.ilc_poly); ilc13.ilc_poly = 0; } last13 = aSelector; } RETURN ( (*ilc13.ilc_func)(self, aSelector, nil, &ilc13, argP[0], argP[1], argP[2], argP[3], argP[4], argP[5], argP[6], argP[7], argP[8], argP[9], argP[10], argP[11], argP[12])); } case 14: { static OBJ last14 = nil; static struct inlineCache ilc14 = __ILCPERF14(@line); if ((InterruptPending != nil) || (aSelector != last14)) { ilc14.ilc_func = __SEND14ADDR__; if (ilc14.ilc_poly) { __flushPolyCache(ilc14.ilc_poly); ilc14.ilc_poly = 0; } last14 = aSelector; } RETURN ( (*ilc14.ilc_func)(self, aSelector, nil, &ilc14, argP[0], argP[1], argP[2], argP[3], argP[4], argP[5], argP[6], argP[7], argP[8], argP[9], argP[10], argP[11], argP[12], argP[13])); } case 15: { static OBJ last15 = nil; static struct inlineCache ilc15 = __ILCPERF15(@line); if ((InterruptPending != nil) || (aSelector != last15)) { ilc15.ilc_func = __SEND15ADDR__; if (ilc15.ilc_poly) { __flushPolyCache(ilc15.ilc_poly); ilc15.ilc_poly = 0; } last15 = aSelector; } RETURN ( (*ilc15.ilc_func)(self, aSelector, nil, &ilc15, argP[0], argP[1], argP[2], argP[3], argP[4], argP[5], argP[6], argP[7], argP[8], argP[9], argP[10], argP[11], argP[12], argP[13], argP[14])); } } bad:; %}. "/ arrive here, if bad number of arguments (too many) "/ ST/X (currently) only allows up to 15 method arguments ^ self primitiveFailed ! perform:aSelector withOptionalArgument:arg "send aSelector-message to the receiver. If the message expects an argument, pass arg." aSelector numArgs == 1 ifTrue:[ ^ self perform:aSelector with:arg ]. ^ self perform:aSelector " |rec sel| rec := -1. sel := #abs. rec perform:sel withOptionalArgument:2. sel := #max:. rec perform:sel withOptionalArgument:2. " ! perform:aSelector withOptionalArgument:optionalArg1 and:optionalArg2 "send aSelector-message to the receiver. Depending on the number of arguments the message expects, pass either none, 1, or 2 arguments." |numArgs| numArgs := aSelector numArgs. numArgs == 0 ifTrue:[ ^ self perform:aSelector ]. numArgs == 1 ifTrue:[ ^ self perform:aSelector with:optionalArg1 ]. ^ self perform:aSelector with:optionalArg1 with:optionalArg2. " |rec sel| rec := -1. sel := #abs. rec perform:sel withOptionalArgument:2. sel := #max:. rec perform:sel withOptionalArgument:2. " ! perform:aSelector withOptionalArgument:optionalArg1 and:optionalArg2 and:optionalArg3 "send aSelector-message to the receiver. Depending on the number of arguments the message expects, pass either none, 1, 2 or 3 arguments." |numArgs| numArgs := aSelector numArgs. numArgs == 0 ifTrue:[ ^ self perform:aSelector ]. numArgs == 1 ifTrue:[ ^ self perform:aSelector with:optionalArg1 ]. numArgs == 2 ifTrue:[ ^ self perform:aSelector with:optionalArg1 with:optionalArg2 ]. ^ self perform:aSelector with:optionalArg1 with:optionalArg2 with:optionalArg3. " |rec sel| rec := -1. sel := #abs. rec perform:sel withOptionalArgument:2. sel := #max:. rec perform:sel withOptionalArgument:2. " ! perform:aSelector withOptionalArgument:optionalArg1 and:optionalArg2 and:optionalArg3 and:optionalArg4 "send aSelector-message to the receiver. Depending on the number of arguments the message expects, pass either none, 1, 2, 3 or 4 arguments." |numArgs| numArgs := aSelector numArgs. numArgs == 0 ifTrue:[ ^ self perform:aSelector ]. numArgs == 1 ifTrue:[ ^ self perform:aSelector with:optionalArg1 ]. numArgs == 2 ifTrue:[ ^ self perform:aSelector with:optionalArg1 with:optionalArg2 ]. numArgs == 3 ifTrue:[ ^ self perform:aSelector with:optionalArg1 with:optionalArg2 with:optionalArg3 ]. ^ self perform:aSelector with:optionalArg1 with:optionalArg2 with:optionalArg3 with:optionalArg4. " |rec sel| rec := -1. sel := #abs. rec perform:sel withOptionalArgument:2. sel := #max:. rec perform:sel withOptionalArgument:2. " ! performMethod:aMethod "invoke aMethod on the receiver. The method should be a zero-argument method. This is a non-object-oriented entry, applying a method in a functional way on a receiver. Warning: Take care for the method to be appropriate for the receiver - no checking is done by the VM." ^ aMethod valueWithReceiver:self arguments:#() " |mthd| mthd := SmallInteger compiledMethodAt:#negated. Transcript showCR:(1 performMethod:mthd) " "BAD USE example: |mthd| mthd := Point compiledMethodAt:#x. Transcript showCR:((1->2) performMethod:mthd) " "Modified: 31.7.1997 / 17:41:50 / cg" ! performMethod:aMethod arguments:argumentArray "invoke aMethod on the receiver, passing an argumentArray. The size of the argumentArray should match the number of args expected by the method. This is a non-object-oriented entry, applying a method in a functional way on a receiver. Warning: Take care for the method to be appropriate for the receiver - no checking is done by the VM." ^ aMethod valueWithReceiver:self arguments:argumentArray " |mthd| mthd := SmallInteger compiledMethodAt:#+. Transcript showCR:(1 performMethod:mthd arguments:#(2)) " "Created: 31.7.1997 / 17:46:31 / cg" ! performMethod:aMethod with:arg "invoke aMethod on the receiver, passing an argument. The method should be a one-argument method. This is a non-object-oriented entry, applying a method in a functional way on a receiver. Warning: Take care for the method to be appropriate for the receiver - no checking is done by the VM." ^ aMethod valueWithReceiver:self arguments:(Array with:arg) " |mthd| mthd := SmallInteger compiledMethodAt:#+. Transcript showCR:(1 performMethod:mthd with:2) " "Modified: 31.7.1997 / 17:42:32 / cg" ! performMethod:aMethod with:arg1 with:arg2 "invoke aMethod on the receiver, passing two arguments. The method should be a two-argument method. This is a non-object-oriented entry, applying a method in a functional way on a receiver. Warning: Take care for the method to be appropriate for the receiver - no checking is done by the VM." ^ aMethod valueWithReceiver:self arguments:(Array with:arg1 with:arg2) " |mthd arr| arr := Array new:1. mthd := Array compiledMethodAt:#basicAt:put:. arr performMethod:mthd with:1 with:'foo'. Transcript showCR:arr " "Modified: 31.7.1997 / 17:44:54 / cg" ! performMethod:aMethod with:arg1 with:arg2 with:arg3 "invoke aMethod on the receiver, passing three arguments. The method should be a three-argument method. This is a non-object-oriented entry, applying a method in a functional way on a receiver. Warning: Take care for the method to be appropriate for the receiver - no checking is done by the VM." ^ aMethod valueWithReceiver:self arguments:(Array with:arg1 with:arg2 with:arg3) "Created: 31.7.1997 / 17:45:20 / cg" ! performX:aSelector "send the message aSelector to the receiver" %{ REGISTER OBJ sel = aSelector; if (InterruptPending == nil) { struct inlineCache *pIlc; #define SEL_AND_ILC_INIT_1(l) { nil , __ILCPERF0(l) } #define SEL_AND_ILC_INIT_2(l) SEL_AND_ILC_INIT_1(l) , SEL_AND_ILC_INIT_1(l) #define SEL_AND_ILC_INIT_4(l) SEL_AND_ILC_INIT_2(l) , SEL_AND_ILC_INIT_2(l) #define SEL_AND_ILC_INIT_8(l) SEL_AND_ILC_INIT_4(l) , SEL_AND_ILC_INIT_4(l) #define SEL_AND_ILC_INIT_16(l) SEL_AND_ILC_INIT_8(l) , SEL_AND_ILC_INIT_8(l) #define SEL_AND_ILC_INIT_32(l) SEL_AND_ILC_INIT_16(l) , SEL_AND_ILC_INIT_16(l) #define SEL_AND_ILC_INIT_32(l) SEL_AND_ILC_INIT_16(l) , SEL_AND_ILC_INIT_16(l) #define SEL_AND_ILC_INIT_64(l) SEL_AND_ILC_INIT_32(l) , SEL_AND_ILC_INIT_32(l) #define SEL_AND_ILC_INIT_128(l) SEL_AND_ILC_INIT_64(l) , SEL_AND_ILC_INIT_64(l) #define SEL_AND_ILC_INIT_256(l) SEL_AND_ILC_INIT_128(l) , SEL_AND_ILC_INIT_128(l) #define nilcs 256 static struct sel_and_ilc { OBJ sel; struct inlineCache ilc; struct sel_and_ilc *next; } sel_and_ilc[nilcs] = { SEL_AND_ILC_INIT_256(29) }; #undef SEL_AND_ILC_INIT_1 #undef SEL_AND_ILC_INIT_2 #undef SEL_AND_ILC_INIT_4 #undef SEL_AND_ILC_INIT_8 #undef SEL_AND_ILC_INIT_16 #undef SEL_AND_ILC_INIT_32 #undef SEL_AND_ILC_INIT_64 #undef SEL_AND_ILC_INIT_128 #undef SEL_AND_ILC_INIT_256 static struct sel_and_ilc *nextFree = sel_and_ilc; static struct sel_and_ilc *lastUsed = 0; int n; struct sel_and_ilc *slot, *prev, *prevPrev; for (n=0, slot = lastUsed, prev = prevPrev = 0; slot; n++, slot = slot->next) { if (sel == slot->sel) { printf("cached slot %d (len=%d)\n", slot-sel_and_ilc, n); pIlc = &(slot->ilc); // move to front if (prev) { prev->next = slot->next; } slot->next = lastUsed; lastUsed = slot; pIlc = &(slot->ilc); goto perform0_send_and_return; } prevPrev = prev; prev = slot; } // not recently used... if (nextFree) { // another free one slot = nextFree; nextFree = nextFree + 1; if (nextFree >= &(sel_and_ilc[nilcs])) nextFree = 0; printf("new slot %d\n", slot-sel_and_ilc); } else { // no more for reuse - use least recently used slot = prev; prevPrev->next = 0; slot->next = lastUsed; lastUsed = slot; printf("reuse last slot %d\n", slot-sel_and_ilc); } /*printf("Object >> #perform: #%s --> no PIC found\n", __symbolVal(aSelector));*/ pIlc = &(slot->ilc); slot->sel = sel; pIlc->ilc_func = __SEND0ADDR__; if (pIlc->ilc_poly) { __flushPolyCache(pIlc->ilc_poly); pIlc->ilc_poly = 0; } perform0_send_and_return: RETURN ( (*(pIlc->ilc_func))(self, sel, nil, pIlc) ); } else { static struct inlineCache ilc0 = __DUMMYILCSELF0(@line+1); RETURN (_SEND0(self, aSelector, nil, &ilc0)); } %}. ^ self perform:aSelector withArguments:#() ! returnablePerform:aSelector with:arg "send the one-arg-message aSelector to the receiver. This is the same as #perform:with: but the context can return." %{ REGISTER OBJ sel = aSelector; if (InterruptPending == nil) { struct inlineCache *pIlc; /* JV @ 2010-22-07: To improve performance I use 256 ILCs instead of default 4. For details, see comment in perform: */ #define SEL_AND_ILC_INIT_1(l) { nil , __ILCPERF1(l) } #define SEL_AND_ILC_INIT_2(l) SEL_AND_ILC_INIT_1(l) , SEL_AND_ILC_INIT_1(l) #define SEL_AND_ILC_INIT_4(l) SEL_AND_ILC_INIT_2(l) , SEL_AND_ILC_INIT_2(l) #define SEL_AND_ILC_INIT_8(l) SEL_AND_ILC_INIT_4(l) , SEL_AND_ILC_INIT_4(l) #define SEL_AND_ILC_INIT_16(l) SEL_AND_ILC_INIT_8(l) , SEL_AND_ILC_INIT_8(l) #define SEL_AND_ILC_INIT_32(l) SEL_AND_ILC_INIT_16(l) , SEL_AND_ILC_INIT_16(l) #define SEL_AND_ILC_INIT_32(l) SEL_AND_ILC_INIT_16(l) , SEL_AND_ILC_INIT_16(l) #define SEL_AND_ILC_INIT_64(l) SEL_AND_ILC_INIT_32(l) , SEL_AND_ILC_INIT_32(l) #define SEL_AND_ILC_INIT_128(l) SEL_AND_ILC_INIT_64(l) , SEL_AND_ILC_INIT_64(l) #define SEL_AND_ILC_INIT_256(l) SEL_AND_ILC_INIT_128(l) , SEL_AND_ILC_INIT_128(l) #define nilcs 256 static struct { OBJ sel; struct inlineCache ilc; } sel_and_ilc[nilcs] = { SEL_AND_ILC_INIT_256(29) }; #undef SEL_AND_ILC_INIT_1 #undef SEL_AND_ILC_INIT_2 #undef SEL_AND_ILC_INIT_4 #undef SEL_AND_ILC_INIT_8 #undef SEL_AND_ILC_INIT_16 #undef SEL_AND_ILC_INIT_32 #undef SEL_AND_ILC_INIT_64 #undef SEL_AND_ILC_INIT_128 #undef SEL_AND_ILC_INIT_256 static flip = 0; int i; for (i = 0; i < nilcs; i++) { if (sel == sel_and_ilc[i].sel) { pIlc = &sel_and_ilc[i].ilc; goto perform1_send_and_return; } } /*printf("Object >> #perform: #%s with: arg --> no PIC found\n", __symbolVal(aSelector));*/ pIlc = &sel_and_ilc[flip].ilc; sel_and_ilc[flip].sel = sel; flip = (flip + 1) % nilcs; pIlc->ilc_func = __SEND1ADDR__; if (pIlc->ilc_poly) { __flushPolyCache(pIlc->ilc_poly); pIlc->ilc_poly = 0; } perform1_send_and_return: RETURN ( (*(pIlc->ilc_func))(self, sel, nil, pIlc, arg) ); } else { static struct inlineCache ilc1 = __DUMMYILCSELF1(@line+1); RETURN (_SEND1(self, aSelector, nil, &ilc1, arg)); } %}. ^ self perform:aSelector withArguments:(Array with:arg) ! ! !Object methodsFor:'object persistency'! elementDescriptorFor:anAspectSymbol "support for persistency: answer a collection of associations containing the objects state to be encoded for aspect. Association key is the instance variable name or access selector, association value is the contents of the instance variable. The default is to return the contents of all non-nil instance variables" |ret| ret := 0. anAspectSymbol notNil ifTrue:[ ret := self perform:anAspectSymbol ifNotUnderstood:[0]. ]. ret == 0 ifTrue:[ ^ self elementDescriptorForNonNilInstanceVariables ]. ^ ret. ! elementDescriptorForInstanceVariables "return all instance variables for visiting/encoding" ^ self elementDescriptorForInstanceVariablesMatching:[:val | true]. " #(1 2 3 nil true symbol) elementDescriptorForInstanceVariables Dictionary new elementDescriptorForInstanceVariables (5 @ nil) elementDescriptorForInstanceVariables " ! elementDescriptorForInstanceVariablesMatching:aBlock "return all instance variables which conform to aBlock, for encoding/visiting. Indexed vars are all included." |instVarNames theClass children instSize "{ Class: SmallInteger }" varSize "{ Class: SmallInteger }"| theClass := self class. instSize := theClass instSize. varSize := theClass isVariable ifTrue:[self basicSize] ifFalse:[0]. children := OrderedCollection new:(instSize + varSize). instVarNames := theClass allInstVarNames. 1 to:instSize do:[:i | |var| var := self instVarAt:i. (aBlock value:var) ifTrue:[ children add:((instVarNames at:i) -> var) ] ]. varSize ~~ 0 ifTrue:[ 1 to:varSize do:[:i | children add:(i -> (self basicAt:i)) ] ]. ^ children. " #(1 2 3 nil true symbol) elementDescriptorForInstanceVariables Dictionary new elementDescriptorForInstanceVariables (5 @ nil) elementDescriptorForInstanceVariables " ! elementDescriptorForNonNilInstanceVariables "return all non-nil instance variables for visiting/encoding" ^ self elementDescriptorForInstanceVariablesMatching:[:val | val notNil]. " #(1 2 3 nil true symbol) elementDescriptorForNonNilInstanceVariables Dictionary new elementDescriptorForNonNilInstanceVariables (5 @ nil) elementDescriptorForNonNilInstanceVariables " ! ! !Object methodsFor:'printing & storing'! basicPrintOn:aStream "append the receivers className with an articel to the argument, aStream" aStream nextPutAll:self classNameWithArticle ! className "return the classname of the receiver's class" ^ self class name " 1 className 1 class className $a className $a class className " ! classNameWithArticle "return a string consisting of classname preceeded by an article. (dont expect me to write national variants for this ... :-) If you have special preferences, redefine it ..." | cls| (cls := self class) == self ifTrue:[ ^ 'a funny object' ]. cls isNil ifTrue:[ ^ 'a nil-classes object' "/ cannot happen ]. ^ cls nameWithArticle " 1 classNameWithArticle (1->2) classNameWithArticle XWorkstation basicNew classNameWithArticle XWorkstation classNameWithArticle " "Modified: 13.5.1996 / 12:16:14 / cg" ! errorPrint "print the receiver on the Transcript and Stderr. The Transcript is directed to the standard error stream on headless applications." Stderr isNil ifTrue:[ "/ the following allows errorPrint to be used during "/ the early init-phase, when no Stderr has been set up. "/ (depends on string to respond to #errorPrint) self printString utf8Encoded errorPrint. ^ self. ]. self withErrorStreamDo:[:s | self printOn:s]. "Modified: / 21-04-2011 / 12:46:42 / cg" ! errorPrintCR "{ Pragma: +optSpace }" "print the receiver followed by a cr on the error stream(s). The Transcript is directed to the standard error stream on headless applications." Stderr isNil ifTrue:[ "/ the following allows errorPrintCR to be used during "/ the early init-phase, when no Stderr has been set up. "/ (depends on string to respond to #errorPrintCR) self printString utf8Encoded errorPrintCR. ^ self. ]. self withErrorStreamDo:[:s | self printOn:s. s cr]. " 'hello' errorPrintCR " "Created: / 20-05-1996 / 10:20:41 / cg" "Modified: / 21-04-2011 / 12:47:13 / cg" ! errorPrintNL "{ Pragma: +optSpace }" "print the receiver followed by a cr on the standard error stream. Please use #errorPrintCR - this method exists for backward compatibility." ^ self errorPrintCR "Modified: 20.5.1996 / 10:24:45 / cg" ! errorPrintNewline "{ Pragma: +optSpace }" "print the receiver followed by a cr on the standard error stream. Please use #errorPrintCR - this method exists for backward compatibility." self errorPrintCR. "Modified: 20.5.1996 / 10:24:38 / cg" ! infoPrint "{ Pragma: +optSpace }" "print the receiver on the standard error stream. This is meant for information messages which are not warnings or fatal messages. These messages can be turned on/off by 'Object infoPrinting:true/false'" InfoPrinting == true ifTrue:[ self errorPrint ] ! infoPrintCR "{ Pragma: +optSpace }" "print the receiver followed by a cr on the standard error stream. This is meant for information messages which are not warnings or fatal messages. These messages can be turned on/off by 'Object infoPrinting:true/false'" InfoPrinting == true ifTrue:[ self errorPrintCR ] "Created: 20.5.1996 / 10:21:28 / cg" ! infoPrintNL "{ Pragma: +optSpace }" "print the receiver followed by a cr on the standard error stream. Please use #infoPrintCR - this method exists for backward compatibility." ^ self infoPrintCR ! print "print the receiver on the standard output stream (which is not the Transcript)" "/ the following allows printCR to be used during "/ the early init-phase, when no Stdout has been set up. "/ (depends on string to respond to #print) Stdout isNil ifTrue:[ self printString utf8Encoded print. ^ self ]. self printOn:Stdout "Modified: 4.11.1996 / 23:36:58 / cg" ! printCR "print the receiver followed by a cr on the standard output stream (which is not the Transcript)" "/ the following allows printCR to be used during "/ the early init-phase, when no Stdout has been set up. "/ (depends on string to respond to #printCR) Stdout isNil ifTrue:[ self printString utf8Encoded printCR. ^ self ]. self printOn:Stdout. Stdout cr "Created: 20.5.1996 / 10:21:37 / cg" "Modified: 4.11.1996 / 23:37:06 / cg" ! printNL "print the receiver followed by a cr on the standard output stream This exists for GNU Smalltalk compatibility - please use #printCR." ^ self printCR "Modified: 20.5.1996 / 10:25:31 / cg" ! printNewline "print the receiver followed by a cr on the standard output stream. This exists for backward compatibility - please use #printCR." self printCR "Modified: 20.5.1996 / 10:25:46 / cg" ! printOn:aStream "append a user printed representation of the receiver to aStream. The format is suitable for a human - not meant to be read back. The default here is to output the receivers class name. BUT: this method is heavily redefined for objects which can print prettier." self basicPrintOn:aStream. " (1@2) printOn:Transcript (1@2) basicPrintOn:Transcript " ! printOn:aStream format:format "this may be redefined in subclasses. Defined here for compatibility with subclasses" self printOn:aStream. ! printOn:aStream leftPaddedTo:size "print the receiver on aStream, padding with spaces up to size. padding is done on the left." self printOn:aStream leftPaddedTo:size with:(Character space) " 123 printOn:Transcript leftPaddedTo:10. Transcript cr 123 printOn:Transcript leftPaddedTo:2. Transcript cr " ! printOn:aStream leftPaddedTo:size with:padCharacter "print the receiver on aStream, padding with padCharacters up to size. padding is done on the left." aStream nextPutAll:(self printStringLeftPaddedTo:size with:padCharacter) " 123 printOn:Transcript leftPaddedTo:10 with:$_ . Transcript cr 123 printOn:Transcript leftPaddedTo:10 with:$. . Transcript cr " ! printOn:aStream paddedTo:size "print the receiver on aStream, padding with spaces up to size." self printOn:aStream paddedTo:size with:(Character space) " 123.0 printOn:Transcript paddedTo:10. Transcript nextPut:$|. Transcript cr " ! printOn:aStream paddedTo:size with:padCharacter "print the receiver on aStream, padding with padCharacter up to size" aStream nextPutAll:(self printStringPaddedTo:size with:padCharacter). " 123 printOn:Transcript paddedTo:10 with:$_ . Transcript cr 123 printOn:Transcript paddedTo:10 with:$. . Transcript cr " ! printOn:aStream zeroPaddedTo:size "print the receiver on aStream, padding with zeros up to size. Usually used with float numbers." self printOn:aStream paddedTo:size with:$0. " 123.0 printOn:Transcript zeroPaddedTo:10 " ! printRightAdjustLen:size "obsolete - just a name confusion. This method will go away ..." (self printStringLeftPaddedTo:size) printOn:Stdout ! printString "return a string for printing the receiver. Since we now use printOn: as the basic print mechanism, we have to create a stream and print into it." |s| s := CharacterWriteStream on:(String basicNew:40). "allocate at least 46 bytes for fast UUID conversion" self printOn:s. ^ s contents. " Date today printString. " ! printStringFormat:orintFormat "subclasses may redefine this. Defined here to avoid type checks" ^ self printString ! printStringLeftPaddedTo:size "return my printString as a right-adjusted string of length size; characters on the left are filled with spaces. If the printString is longer than size, it is returned unchanged (i.e. not truncated)" ^ self printStringLeftPaddedTo:size with:(Character space) " 10 printStringLeftPaddedTo:10 1 printStringLeftPaddedTo:10 " ! printStringLeftPaddedTo:size ifLarger:alternative "return my printString as a right-adjusted string of length size; characters on the left are filled with spaces. If the printString is larger than size, return the result from evaluating alternative." ^ self printStringLeftPaddedTo:size with:(Character space) ifLarger:alternative " 12 printStringLeftPaddedTo:3 ifLarger:['***'] 123 printStringLeftPaddedTo:3 ifLarger:['***'] 1234 printStringLeftPaddedTo:3 ifLarger:['***'] " ! printStringLeftPaddedTo:size with:padCharacter "return my printString as a right-adjusted string of length size; characters on the left are filled with padCharacter. If the printString is longer than size, it is returned unchanged (i.e. not truncated)" ^ (self printString) leftPaddedTo:size with:padCharacter " 123 printStringLeftPaddedTo:10 with:$. 1 printStringLeftPaddedTo:10 with:$. (Float pi) printStringLeftPaddedTo:20 with:$* " ! printStringLeftPaddedTo:size with:padCharacter ifLarger:alternative "return my printString as a right-adjusted string of length size; characters on the left are filled with padCharacter. If the printString is larger than size, return the result from evaluating alternative." |s| s := self printString. s size > size ifTrue:[^ alternative value]. ^ s leftPaddedTo:size with:padCharacter " 12 printStringLeftPaddedTo:3 with:$. ifLarger:['***'] 123 printStringLeftPaddedTo:3 with:$. ifLarger:['***'] 1234 printStringLeftPaddedTo:3 with:$. ifLarger:['***'] " ! printStringLimitedTo:sizeLimit "return a string for printing the receiver, but limit the result string in its size." |s| s := CharacterWriteStream on:(String basicNew:30). s writeLimit:sizeLimit. self printOn:s. ^ s contents. " Date today printStringLimitedTo:5. '12345678901234567890' printStringLimitedTo:5. " ! printStringOnError:exceptionBlock "return a string for printing the receiver; if any error occurs, return the result from evaluating exceptionBlock. Useful to print something in an exceptionHandler or other cleanup code." |rslt| Error handle:[:ex | rslt := exceptionBlock value ] do:[ rslt := self printString ]. ^ rslt ! printStringPaddedTo:size "return a printed representation of the receiver, padded with spaces (at the right) up to size. If the printString is longer than size, it is returned unchanged (i.e. not truncated)" ^ self printStringPaddedTo:size with:(Character space) " 123 printStringPaddedTo:10 1234567890123456 printStringPaddedTo:10 'hello' printStringPaddedTo:10 " ! printStringPaddedTo:size ifLarger:alternative "return a printed representation of the receiver, padded with spaces (at the right) up to size. If the resulting printString is too large, return the result from evaluating alternative." ^ self printStringPaddedTo:size with:(Character space) ifLarger:alternative " 12 printStringPaddedTo:3 ifLarger:['***'] 123 printStringPaddedTo:3 ifLarger:['***'] 1234 printStringPaddedTo:3 ifLarger:['***'] " ! printStringPaddedTo:size with:padCharacter "return a printed representation of the receiver, padded with padCharacter (at the right) up to size. If the printString is longer than size, it is returned unchanged (i.e. not truncated)" ^ (self printString) paddedTo:size with:padCharacter " 123 printStringPaddedTo:10 with:$. 123 printStringPaddedTo:10 with:$* 123 printStringPaddedTo:3 with:$* 1234 printStringPaddedTo:3 with:$* " ! printStringPaddedTo:size with:padCharacter ifLarger:alternative "return a printed representation of the receiver, padded with padCharacter (at the right) up to size. If the resulting printString is too large, return the result from evaluating alternative." |s| s := self printString. s size > size ifTrue:[^ alternative value]. ^ s paddedTo:size with:padCharacter " 123 printStringPaddedTo:3 with:$. ifLarger:['***'] 12345 printStringPaddedTo:3 with:$. ifLarger:['***'] " ! printStringRightAdjustLen:size "obsolete - just a name confusion. This method will go away ..." ^ self printStringLeftPaddedTo:size ! printStringZeroPaddedTo:size "return a printed representation of the receiver, padded with zero (at the right) characters up to size. Usually used with float numbers." ^ self printStringPaddedTo:size with:$0 " 123.0 printStringZeroPaddedTo:10 " ! printfPrintString:ignoredFormat "fallback to default printString (for compatibility with float and integer-printing)" ^ self printString ! store "store the receiver on standard output. this method is useless, but included for compatibility." self storeOn:Stdout ! storeArrayElementOn:aStream "store an object as an Array element. Subclasses may redefine this to omit a leading '#'" ^ self storeOn:aStream ! storeCR "store the receiver on standard output; append a carriage return." self store. Stdout cr. "Created: 20.5.1996 / 10:26:01 / cg" "Modified: 20.5.1996 / 10:26:57 / cg" ! storeNl "store the receiver on standard output; append a newline. This method is included for backward compatibility- use #storeCR." self storeCR. "Modified: 20.5.1996 / 10:26:49 / cg" ! storeOn:aStream "store the receiver on aStream; i.e. print an expression which will reconstruct the receiver. Notice, that no self referencing or cyclic objects can be represented in this format. Use storeBinaryOn:, which handles these cases correctly." |myClass hasSemi sz "{ Class: SmallInteger }" | thisContext isRecursive ifTrue:[ RecursiveStoreError raiseRequestWith:self. 'Object [error]: storeString of self referencing object (' errorPrint. self class name errorPrint. ')' errorPrintCR. aStream nextPutAll:'#("recursive")'. ^ self ]. myClass := self class. aStream nextPut:$(. aStream nextPutAll:self class name. hasSemi := false. myClass isVariable ifTrue:[ aStream nextPutAll:' basicNew:'. self basicSize printOn:aStream ] ifFalse:[ aStream nextPutAll:' basicNew' ]. sz := myClass instSize. 1 to:sz do:[:i | aStream nextPutAll:' instVarAt:'. i printOn:aStream. aStream nextPutAll:' put:'. (self instVarAt:i) storeOn:aStream. aStream nextPut:$;. hasSemi := true ]. myClass isVariable ifTrue:[ sz := self basicSize. 1 to:sz do:[:i | aStream nextPutAll:' basicAt:'. i printOn:aStream. aStream nextPutAll:' put:'. (self basicAt:i) storeOn:aStream. aStream nextPut:$;. hasSemi := true ] ]. hasSemi ifTrue:[ aStream nextPutAll:' yourself' ]. aStream nextPut:$). " |s| s := WriteStream on:(String new). ('hello' -> 'world') storeOn:s. s := ReadStream on:(s contents). (Object readFrom:s) inspect " " |s| s := 'data' asFilename writeStream. ('hello' -> 'world') storeOn:s. s close. s := 'data' asFilename readStream. (Object readFrom:s) inspect " "does not work example:" " |s a| a := Array new:2. a at:1 put:a. s := 'data' asFilename writeStream. a storeOn:s. s close. s := 'data' asFilename readStream. (Object readFrom:s) inspect " "Modified: / 03-12-2010 / 13:27:51 / cg" ! storeString "return a string representing an expression to reconstruct the receiver. Notice, that no self referencing or cyclic objects can be represented in this format. Use storeBinaryOn:, which handles these cases correctly." |s| s := WriteStream on:(String new:50). self storeOn:s. ^ s contents ! withErrorStreamDo:aBlock "{ Pragma: +optSpace }" "helper for error messages - evaluate aBlock, passing it a stream on which to put error messages." |stream| stream := Processor activeProcess isSystemProcess ifTrue:[Stderr] ifFalse:[Transcript]. StreamError catch:[ aBlock value:stream. ]. stream ~~ Stderr ifTrue:[ aBlock value:Stderr. ]. "Created: / 21-04-2011 / 12:46:21 / cg" ! ! !Object methodsFor:'queries'! basicSize "return the number of the receivers indexed instance variables, 0 if it has none. This method should NOT be redefined in any subclass (except with great care, for tuning)" %{ /* NOCONTEXT */ REGISTER INT nbytes; REGISTER OBJ myClass; int nInstBytes; /* * notice the missing test for self being a nonNilObject - * this can be done since basicSize is defined both in UndefinedObject * and SmallInteger */ myClass = __qClass(self); nbytes = __qSize(self); nInstBytes = OHDR_SIZE + __OBJS2BYTES__( __intVal(__ClassInstPtr(myClass)->c_ninstvars) ); switch ((INT)(__ClassInstPtr(myClass)->c_flags) & __MASKSMALLINT(ARRAYMASK)) { case __MASKSMALLINT(POINTERARRAY): case __MASKSMALLINT(WKPOINTERARRAY): nbytes -= nInstBytes; RETURN ( __mkSmallInteger(__BYTES2OBJS__(nbytes)) ); case __MASKSMALLINT(BYTEARRAY): nbytes -= nInstBytes; RETURN ( __mkSmallInteger(nbytes / sizeof(char)) ); case __MASKSMALLINT(FLOATARRAY): nbytes -= nInstBytes; RETURN ( __mkSmallInteger(nbytes / sizeof(float)) ); case __MASKSMALLINT(DOUBLEARRAY): #ifdef __NEED_DOUBLE_ALIGN nInstBytes = (nInstBytes-1+__DOUBLE_ALIGN) &~ (__DOUBLE_ALIGN-1); #endif nbytes -= nInstBytes; RETURN ( __mkSmallInteger(nbytes / sizeof(double)) ); case __MASKSMALLINT(WORDARRAY): case __MASKSMALLINT(SWORDARRAY): nbytes -= nInstBytes; RETURN ( __mkSmallInteger(nbytes>>1) ); /* notice the hardcoded 2 here - not sizeof(short) */ case __MASKSMALLINT(LONGARRAY): case __MASKSMALLINT(SLONGARRAY): nbytes -= nInstBytes; RETURN ( __mkSmallInteger(nbytes>>2) ); /* notice the hardcoded 4 here - not sizeof(int) */ case __MASKSMALLINT(LONGLONGARRAY): case __MASKSMALLINT(SLONGLONGARRAY): #ifdef __NEED_LONGLONG_ALIGN nInstBytes = (nInstBytes-1+__LONGLONG_ALIGN) &~ (__LONGLONG_ALIGN-1); #endif nbytes -= nInstBytes; RETURN ( __mkSmallInteger(nbytes>>3) ); /* notice the hardcoded 8 here - not sizeof(long long) */ } %}. ^ 0 ! byteSize "return the number of bytes in the receivers indexed instance variables, 0 if it has none. This only returns non-zero for non-pointer indexed instvars i.e. byteArrays, wordArrays etc. Notice: for Strings the returned size may look strange. Only useful with binary storage." |myClass| myClass := self class. myClass isVariable ifTrue:[ myClass isPointers ifFalse:[ myClass isBytes ifTrue:[ ^ self basicSize. ]. myClass isWords ifTrue:[ ^ self basicSize * 2. ]. myClass isSignedWords ifTrue:[ ^ self basicSize * 2. ]. myClass isLongs ifTrue:[ ^ self basicSize * 4. ]. myClass isSignedLongs ifTrue:[ ^ self basicSize * 4. ]. myClass isLongLongs ifTrue:[ ^ self basicSize * 8. ]. myClass isSignedLongLongs ifTrue:[ ^ self basicSize * 8. ]. myClass isFloats ifTrue:[ ^ self basicSize * (ExternalBytes sizeofFloat) ]. myClass isDoubles ifTrue:[ ^ self basicSize * (ExternalBytes sizeofDouble) ]. self error:'unknown variable size class species'. ] ]. ^ 0 " Point new byteSize 'hello' byteSize 'hello' asUnicode16String byteSize (ByteArray with:1 with:2) byteSize (FloatArray with:1.5) byteSize (DoubleArray with:1.5) byteSize (WordArray with:1 with:2) byteSize " ! class "return the receivers class" %{ /* NOCONTEXT */ RETURN ( __Class(self) ); %} ! respondsTo:aSelector "return true, if the receiver implements a method with selector equal to aSelector; i.e. if there is a method for aSelector in either the receivers class or one of its superclasses. Notice, that this does not imply, that such a message can be sent without an error being raised. For example, an implementation could send #shouldNotImplement or #subclassResponsibility." " should we go via the cache, or search (by class) ? The first is faster, most of the time; while the 2nd fills the cache with useless data if this is sent in a loop over all objects. For now, use the cache ... " %{ /* NOCONTEXT */ if (__lookup(__Class(self), aSelector) == nil) { RETURN ( false ); } RETURN ( true ); %} . ^ self class canUnderstand:aSelector "'aString' respondsTo:#+" "'aString' respondsTo:#," "'aString' respondsTo:#collect:" ! respondsToArithmetic "return true, if the receiver responds to arithmetic messages. false is returned here - the method is redefined in ArithmeticValue." ^ false ! size "return the number of the receivers indexed instance variables; this method may be redefined in subclasses" ^ self basicSize ! species "return a class which is similar to (or the same as) the receivers class. This is used to create an appropriate object when creating derived copies in the collection classes (sometimes redefined)." ^ self class ! yourself "return the receiver - used for cascades to return self at the end" ^ self ! ! !Object methodsFor:'secure message sending'! ?: selector "try to send a message to the receiver; if understood, return the value; if not, return nil." ^ self perform:selector ifNotUnderstood:nil " ApplicationModel new masterApplication resources first - error ApplicationModel new ?: #masterApplication ?: #resources ?: #first - nil " "Modified: / 20-10-2010 / 10:45:21 / cg" ! askFor:aSelector "try to send the receiver the message, aSelector. If it does not understand it, return false. Otherwise the real value returned. Useful to send messages such as: #isColor to unknown receivers." ^ self perform:aSelector ifNotUnderstood:[false] " 1 askFor:#isColor Color red askFor:#isColor 1 askFor:#isFoo Color red askFor:#isFoo " ! askFor:aSelector with:argument "try to send the receiver the message, aSelector. If it does not understand it, return false. Otherwise the real value returned. Useful to send messages such as: #isXXX: to unknown receivers." ^ self perform:aSelector with:argument ifNotUnderstood:[false] ! askFor:aSelector with:arg1 with:arg2 "try to send the receiver the message, aSelector. If it does not understand it, return false. Otherwise the real value returned. Useful to send messages such as: #isXXX: to unknown receivers." ^ self perform:aSelector with:arg1 with:arg2 ifNotUnderstood:[false] ! perform:aSelector ifNotUnderstood:exceptionBlock "try to send message aSelector to the receiver. If its understood, return the method's returned value, otherwise return the value of the exceptionBlock. Read this: Many programmers do an Error-handle to perform a similar checked-message send. However, this method is more specific, in that only errors for the given selector are cought - not any other doesNotUnderstand, and especially not any other error." |val ok| MessageNotUnderstood handle:[:ex | "/ reject, if the bad message is not the one "/ we have sent originally (ex selector == aSelector and:[ex receiver == self]) ifFalse:[ ex reject ]. ] do:[ val := self perform:aSelector. ok := true. ]. ok isNil ifTrue:[ ^ exceptionBlock value ]. ^ val " 1.2345 perform:#foo ifNotUnderstood:['sorry'] 1.2345 perform:#sqrt ifNotUnderstood:['sorry'] 12345 perform:#sqrt ifNotUnderstood:['sorry'] " ! perform:aSelector with:argument ifNotUnderstood:exceptionBlock "try to send message aSelector to the receiver. If its understood, return the method's returned value, otherwise return the value of the exceptionBlock. Read this: Many programmers do an Error-handle to perform a similar checked-message send. However, this method is more specific, in that only errors for the given selector are cought - not any other doesNotUnderstand, and especially not any other error." |val ok| MessageNotUnderstood handle:[:ex | "/ reject, if the bad message is not the one "/ we have sent originally (ex selector == aSelector and:[ex receiver == self]) ifFalse:[ ex reject ] ] do:[ val := self perform:aSelector with:argument. ok := true. ]. ok isNil ifTrue:[ ^ exceptionBlock value ]. ^ val " |unknown| unknown := 4. (unknown perform:#- with:2 ifNotUnderstood:['sorry']) printNewline. unknown := 'high there'. (unknown perform:#- with:2 ifNotUnderstood:['sorry']) printNewline. " ! perform:aSelector with:arg1 with:arg2 ifNotUnderstood:exceptionBlock "try to send message aSelector to the receiver. If its understood, return the method's returned value, otherwise return the value of the exceptionBlock. Read this: Many programmers do an Error-handle to perform a similar checked-message send. However, this method is more specific, in that only errors for the given selector are cought - not any other doesNotUnderstand, and especially not any other error." |val ok| MessageNotUnderstood handle:[:ex | "/ reject, if the bad message is not the one "/ we have sent originally (ex selector == aSelector and:[ex receiver == self]) ifFalse:[ ex reject ] ] do:[ val := self perform:aSelector with:arg1 with:arg2. ok := true. ]. ok isNil ifTrue:[ ^ exceptionBlock value ]. ^ val ! perform:aSelector withArguments:argumentArray ifNotUnderstood:exceptionBlock "try to send message aSelector to the receiver. If its understood, return the method's returned value, otherwise return the value of the exceptionBlock. Read this: Many programmers do an Error-handle to perform a similar checked-message send. However, this method is more specific, in that only errors for the given selector are cought - not any other doesNotUnderstand, and especially not any other error." |val ok| MessageNotUnderstood handle:[:ex | "/ reject, if the bad message is not the one "/ we have sent originally. (ex selector == aSelector and:[ex receiver == self]) ifFalse:[ ex reject ] ] do:[ val := self perform:aSelector withArguments:argumentArray. ok := true. ]. ok isNil ifTrue:[ ^ exceptionBlock value ]. ^ val " |unknown| unknown := 4. (unknown perform:#- withArguments:#(2) ifNotUnderstood:['sorry']) printNewline. unknown := 'high there'. (unknown perform:#- withArguments:#(2) ifNotUnderstood:['sorry']) printNewline. " "Modified: 27.3.1997 / 14:13:16 / cg" ! ! !Object methodsFor:'signal constants'! messageNotUnderstoodSignal ^ MessageNotUnderstood "Created: 6.3.1997 / 15:46:52 / cg" ! ! !Object methodsFor:'special queries'! allOwners "return a collection of all objects referencing the receiver" ^ ObjectMemory whoReferences:self ! references:anObject "return true, if the receiver refers to the argument, anObject. - for debugging only" ^ self referencesObject:anObject " |v| v := View new initialize. v references:Display. " ! referencesAny:aCollection "return true, if the receiver refers to any object from the argument, aCollection. - for debugging only" %{ OBJ cls, flags; int nInsts, inst; if (! __isNonNilObject(self)) { RETURN (false); } if (__isArrayLike(aCollection)) { int nObjs = __arraySize(aCollection); char *minAddr = 0, *maxAddr = 0; if (nObjs == 0) { RETURN (false); } /* * a little optimization: use the fact that all old objects * refering to a new object are on the remSet; if I am not, * a trivial reject is possible, if all objects are newbees. * as a side effect, gather min/max addresses */ if ((__qSpace(self) <= OLDSPACE) && !__isRemembered(self)) { int allNewBees = 1; int i; minAddr = (char *)(__ArrayInstPtr(aCollection)->a_element[0]); maxAddr = minAddr; for (i=0; ia_element[i]; if (__isNonNilObject(anObject)) { int spc; if (((spc = __qSpace(anObject)) != NEWSPACE) && (spc != SURVSPACE)) { allNewBees = 0; } } if ((char *)anObject < minAddr) { minAddr = (char *)anObject; } else if ((char *)anObject > maxAddr) { maxAddr = (char *)anObject; } } if (allNewBees) { RETURN (false); } } /* * fetch min/max in searchList (if not already done) */ if (minAddr == 0) { int i; for (i=0; ia_element[i]; if ((char *)anObject < minAddr) { minAddr = (char *)anObject; } else if ((char *)anObject > maxAddr) { maxAddr = (char *)anObject; } } } cls = __qClass(self); if (((char *)cls >= minAddr) && ((char *)cls <= maxAddr)) { #if defined(memsrch4) if (memsrch4(__arrayVal(aCollection), (INT)cls, nObjs)) { RETURN (true); } #else int i; for (i=0; ia_element[i]; if (cls == anObject) { RETURN (true); } } #endif /* memsrch4 */ } flags = __ClassInstPtr(cls)->c_flags; if (((INT)flags & __MASKSMALLINT(ARRAYMASK)) == __MASKSMALLINT(POINTERARRAY)) { nInsts = __BYTES2OBJS__(__qSize(self) - OHDR_SIZE); } else { nInsts = __intVal(__ClassInstPtr(cls)->c_ninstvars); } if (! nInsts) { RETURN (false); } if (nObjs == 1) { /* better reverse the loop */ OBJ anObject; anObject = __ArrayInstPtr(aCollection)->a_element[0]; #if defined(memsrch4) if (memsrch4(__InstPtr(self)->i_instvars, (INT)anObject, nInsts)) { RETURN (true); } #else for (inst=0; insti_instvars[inst]) == anObject) { RETURN (true); } } #endif RETURN (false); } for (inst=0; insti_instvars[inst]; int i; if (((char *)instVar >= minAddr) && ((char *)instVar <= maxAddr)) { #if defined(memsrch4) if (memsrch4(__arrayVal(aCollection), (INT)instVar, nObjs)) { RETURN (true); } #else for (i=0; ia_element[i]; if (instVar == anObject) { RETURN (true); } } #endif /* memsrch4 */ } } RETURN (false); } %}. aCollection do:[:el | (self referencesObject:el) ifTrue:[^ true]. ]. ^ false ! referencesDerivedInstanceOf:aClass "return true, if the receiver refers to an instance of the argument, aClass or its subclass. This method exists to support searching for users of a class." |myClass numInst "{ Class: SmallInteger }" | "check the class" (self isKindOf:aClass) ifTrue:[^ true]. myClass := self class. "check the instance variables" numInst := myClass instSize. 1 to:numInst do:[:i | ((self instVarAt:i) isKindOf:aClass) ifTrue:[^ true] ]. "check the indexed variables" myClass isVariable ifTrue:[ myClass isPointers ifFalse:[ "no need to search in non pointer fields" ((aClass == Number) or:[aClass isSubclassOf:Number]) ifFalse:[^ false]. ]. numInst := self basicSize. 1 to:numInst do:[:i | ((self basicAt:i) isKindOf:aClass) ifTrue:[^ true] ] ]. ^ false " (1 @ 3.4) referencesDerivedInstanceOf:Number (1 @ 3.4) referencesDerivedInstanceOf:Array View new initialize referencesDerivedInstanceOf:DeviceWorkstation " ! referencesForWhich:checkBlock do:actionBlock |myClass inst numInst "{ Class: SmallInteger }" | myClass := self class. "check the instance variables" numInst := myClass instSize. 1 to:numInst do:[:i | inst := self instVarAt:i. (checkBlock value:inst) ifTrue:[actionBlock value:inst]. ]. "check the indexed variables" myClass isVariable ifTrue:[ myClass isPointers ifTrue:[ "no need to search in non pointer fields" numInst := self basicSize. 1 to:numInst do:[:i | inst := self basicAt:i. (checkBlock value:inst) ifTrue:[actionBlock value:inst]. ] ] ]. " (1 @ 3.4) referencesForWhich:[:i | i isFloat] do:[:i | Transcript showCR:i] " ! referencesInstanceOf:aClass "return true, if the receiver refers to an instance of the argument, aClass.This method exists to support searching for users of a class." |myClass numInst "{ Class: SmallInteger }" | myClass := self class. "check the class" (myClass isMemberOf:aClass) ifTrue:[^ true]. "check the instance variables" numInst := myClass instSize. 1 to:numInst do:[:i | ((self instVarAt:i) isMemberOf:aClass) ifTrue:[^ true] ]. "check the indexed variables" myClass isVariable ifTrue:[ myClass isPointers ifFalse:[ "no need to search in non-pointer indexed fields" myClass isLongs ifTrue:[ (aClass == SmallInteger or:[aClass == LargeInteger]) ifFalse:[^ false]. ] ifFalse:[ myClass isFloatsOrDoubles ifTrue:[^ aClass == Float]. ^ aClass == SmallInteger ] ]. numInst := self basicSize. 1 to:numInst do:[:i | ((self basicAt:i) isMemberOf:aClass) ifTrue:[^ true] ] ]. ^ false " (1 @ 3.4) referencesInstanceOf:Float (1 @ 3.4) referencesInstanceOf:Fraction View new initialize referencesInstanceOf:(Display class) " ! referencesObject:anObject "return true, if the receiver refers to the argument, anObject. - for debugging only" %{ /* NOCONTEXT */ OBJ cls, flags; int nInsts, i; if (! __isNonNilObject(self)) { RETURN (false); } /* * a little optimization: use the fact that all old objects * refering to a new object are on the remSet; if I am not, * a trivial reject is possible, if anObject is a newbee */ if (__isNonNilObject(anObject)) { if ((__qSpace(self) <= OLDSPACE) && !__isRemembered(self)) { int spc; if (((spc = __qSpace(anObject)) == NEWSPACE) || (spc == SURVSPACE)) { RETURN (false); } } } cls = __qClass(self); if (cls == anObject) { RETURN (true); } flags = __ClassInstPtr(cls)->c_flags; if (((INT)flags & __MASKSMALLINT(ARRAYMASK)) == __MASKSMALLINT(POINTERARRAY)) { nInsts = __BYTES2OBJS__(__qSize(self) - OHDR_SIZE); } else { nInsts = __intVal(__ClassInstPtr(cls)->c_ninstvars); } if (! nInsts) { RETURN (false); } #if defined(memsrch4) if (memsrch4(__InstPtr(self)->i_instvars, (INT)anObject, nInsts)) { RETURN (true); } #else for (i=0; ii_instvars[i] == anObject) { RETURN (true); } } #endif /* memsrch4 */ %}. "/ |myClass "/ numInst "{ Class: SmallInteger }" | "/ "/ myClass := self class. "/ "/ "check the class" "/ (myClass == anObject) ifTrue:[^ true]. "/ "/ "check the instance variables" "/ numInst := myClass instSize. "/ 1 to:numInst do:[:i | "/ ((self instVarAt:i) == anObject) ifTrue:[^ true] "/ ]. "/ "/ "check the indexed variables" "/ myClass isVariable ifTrue:[ "/ myClass isPointers ifFalse:[ "/ "/ "/ "/ we could argue about the following unconditional return: "/ "/ it says that a non pointer array never has a reference to the "/ "/ corresponding object - not mimicing a reference to a copy of the "/ "/ integer. However, it avoids useless searches in huge byteArray "/ "/ like objects when searching for owners. If in doubt, remove it. "/ "/ A consequence of the return below is that #[1 2 3] will say that it "/ "/ does not refer to the number 2 (think of keeping a copy instead) "/ "/ ^ false. "/ "/ "/ alternative: "/ "/ anObject isNumber ifFalse:[^ false]. "/ ]. "/ "/ "/ "/ "/ because arrays are so common, and those have a highly tuned "/ "/ idenitytIndex method, use it "/ "/ "/ myClass == Array ifTrue:[ "/ ^ (self identityIndexOf:anObject) ~~ 0 "/ ]. "/ "/ "/ "/ "/ otherwise, do it the slow way "/ "/ "/ numInst := self basicSize. "/ 1 to:numInst do:[:i | "/ ((self basicAt:i) == anObject) ifTrue:[^ true] "/ ] "/ ]. ^ false " |v| v := View new initialize. v references:Display. " ! ! !Object methodsFor:'synchronized evaluation'! freeSynchronizationSemaphore "free synchronizationSemaphore. May be used, to save memory when an object is no longer used synchronized." |sema| sema := self synchronizationSemaphore. sema notNil ifTrue:[ sema wait. "/ get lock self synchronizationSemaphore:nil. ]. " self synchronized:[]. self synchronizationSemaphore. self freeSynchronizationSemaphore. " "Created: 28.1.1997 / 19:31:20 / stefan" "Modified: 28.1.1997 / 19:47:55 / stefan" ! synchronizationSemaphore "return the synchronization semaphore for myself. subclasses may redefine" ^ SynchronizationSemaphores at:self ifAbsent:[]. " self synchronizationSemaphore " "Modified: 28.1.1997 / 19:47:09 / stefan" ! synchronizationSemaphore:aSemaphore "set the synchronisationSemaphore for myself. subclasses may redefine this method" aSemaphore isNil ifTrue:[ "/ remove Semaphore SynchronizationSemaphores removeKey:self ifAbsent:nil. ] ifFalse:[ SynchronizationSemaphores at:self put:aSemaphore. ]. "Modified: 28.1.1997 / 19:37:48 / stefan" ! synchronized:aBlock "evaluate aBlock synchronized, i.e. use a monitor for this object" |sema wasBlocked| wasBlocked := OperatingSystem blockInterrupts. sema := self synchronizationSemaphore. sema isNil ifTrue:[ sema := RecursionLock new name:self className. self synchronizationSemaphore:sema. ]. wasBlocked ifFalse:[OperatingSystem unblockInterrupts]. sema critical:aBlock. " [Object synchronized:[Delay waitForSeconds:2. Transcript showCR:'1']] fork. [Object synchronized:[Delay waitForSeconds:2. Transcript showCR:'2']] fork. " "Created: 28.1.1997 / 17:52:56 / stefan" "Modified: 30.1.1997 / 13:38:54 / cg" "Modified: 20.2.1997 / 09:43:35 / stefan" ! ! !Object methodsFor:'system primitives'! asOop "ST-80 compatibility: ST-80 returns an OOP-identity based number here (I guess: its address or index); since ST/X has no such thing, and the objects address cannot be used (since its changing over time), we return the objects identityHash key, which provides (at least) some identity indication. However, notice that (in contrast to ST-80's #asOop), the identityHash key of two non-identical objects may be the same. You'd better not use it - especially do not misuse it." ^ self identityHash "Created: 9.11.1996 / 19:09:56 / cg" "Modified: 9.11.1996 / 19:16:04 / cg" ! beImmutable "experimental - not yet usable; do not use" %{ /* NOCONTEXT */ if (! __isNonNilObject(self)) { RETURN (self); } __beImmutable(self); %} ! beMutable "experimental - not yet usable; do not use" %{ /* NOCONTEXT */ if (! __isNonNilObject(self)) { RETURN (self); } __beMutable(self); %} ! become:anotherObject "make all references to the receiver become references to anotherObject and vice-versa. Notice the vice-versa; see #becomeSameAs: for a one-way become. This can be a very dangerous operation - be warned. In general, using #become: should be avoided if possible, since it may produce many strange effects (think of hashing in Sets, Dictionaries etc.). This may also be an expensive (i.e. slow) operation, since in the worst case, the whole memory has to be searched for references to the two objects (although the primitive tries hard to limit the search, for acceptable performance in most cases). This method fails, if the receiver or the argument is a SmallInteger or nil, or is a context of a living method (i.e. one that has not already returned). (notice that #become: is not used heavily by the system - the Collection-classes have been rewritten to not use it.)" %{ if (__primBecome(self, anotherObject)) { RETURN ( self ); } %}. self primitiveFailed ! becomeNil "make all references to the receiver become nil - effectively getting rid of the receiver. This can be a very dangerous operation - be warned. This may be an expensive (i.e. slow) operation. The receiver may not be a SmallInteger or a context of a living method." %{ if (__primBecomeNil(self)) { RETURN ( nil ); } %}. self primitiveFailed ! becomeSameAs:anotherObject "make all references to the receiver become references to anotherObject but NOT vice versa (as done in #become:). This can be a very dangerous operation - be warned. In general, using #become: should be avoided if possible, since it may produce many strange effects (think of hashing in Sets, Dictionaries etc.). This may also be an expensive (i.e. slow) operation, since in the worst case, the whole memory has to be searched for references to the two objects (although the primitive tries hard to limit the search, for acceptable performance in most cases). This method fails, if the receiver or the argument is a SmallInteger or nil, or is a context of a living method (i.e. one that has not already returned)." %{ if (__primBecomeSameAs(self, anotherObject)) { RETURN ( self ); } %}. self primitiveFailed ! changeClassTo:otherClass "changes the class of the receiver to the argument, otherClass. This is only allowed (possible), if the receivers class and the argument have the same structure (i.e. number of named instance variables and type of indexed instance variables). If the structures do not match, or any of the original class or new class is UndefinedObject or a Smallinteger, a primitive error is triggered." |myClass ok| otherClass autoload. "check for UndefinedObject/SmallInteger receiver or newClass" %{ { OBJ other = otherClass; if (__isNonNilObject(self) && __isNonNilObject(other) && (other != UndefinedObject) && (other != SmallInteger)) { ok = true; } else { ok = false; } } %}. ok ifTrue:[ ok := false. myClass := self class. myClass flags == otherClass flags ifTrue:[ myClass instSize == otherClass instSize ifTrue:[ "same instance layout and types: its ok to do it" ok := true. ] ifFalse:[ myClass isPointers ifTrue:[ myClass isVariable ifTrue:[ ok := true ] ] ] ] ifFalse:[ myClass isPointers ifTrue:[ "if newClass is a variable class, with instSize <= my instsize, we can do it (effectively mapping additional instvars into the variable part) - usefulness is questionable, though" otherClass isPointers ifTrue:[ otherClass isVariable ifTrue:[ otherClass instSize <= (myClass instSize + self basicSize) ifTrue:[ ok := true ] ] ifFalse:[ otherClass instSize == (myClass instSize + self basicSize) ifTrue:[ ok := true ] ] ] ifFalse:[ "it does not make sense to convert pointers to bytes ..." ] ] ifFalse:[ "does it make sense, to convert bits ?" "could allow byteArray->wordArray->longArray->floatArray->doubleArray here ..." (myClass isBitsExtended and:[otherClass isBitsExtended]) ifTrue:[ ok := true ] ] ] ]. ok ifTrue:[ "now, change the receivers class ..." %{ { OBJ me = self; // gcc4.4 does not like this: // __qClass(me) = otherClass; __objPtr(me)->o_class = (CLASS_OBJ)otherClass; __STORE(me, otherClass); RETURN (me); } %}. ]. " the receiver cannot be represented as a instance of the desired class. For example, you cannot change a bitInstance (byteArray etc.) into a pointer object and vice versa. " self primitiveFailed ! changeClassToThatOf:anObject "changes the class of the receiver to that of the argument, anObject. This is only allowed (possible), if the receivers class and the arguments class have the same structure (i.e. number of named instance variables and type of indexed instance variables). If the structures do not match, or any of the objects is nil or a Smallinteger, a primitive error is triggered." self changeClassTo:(anObject class) ! isImmutable "experimental - not yet usable; do not use" %{ /* NOCONTEXT */ if (! __isNonNilObject(self)) { RETURN (true); } RETURN (__isImmutable(self) ? true : false); %} ! replaceReferencesTo:anObject with:newRef "if the receiver refers to the argument, anObject, replace this reference with newRef. Return true, if any reference was changed. Notice: this does not change the class-reference." %{ /* NOCONTEXT */ OBJ cls, flags, anyChange; int nInsts, i; if (! __isNonNilObject(self)) { RETURN (false); } /* * a little optimization: use the fact that all old objects * refering to a new object are on the remSet; if I am not, * a trivial reject is possible, if anObject is a newbee */ if (__isNonNilObject(anObject)) { if ((__qSpace(self) <= OLDSPACE) && !__isRemembered(self)) { int spc; if (((spc = __qSpace(anObject)) == NEWSPACE) || (spc == SURVSPACE)) { RETURN (false); } } } cls = __qClass(self); flags = __ClassInstPtr(cls)->c_flags; if (((INT)flags & __MASKSMALLINT(ARRAYMASK)) == __MASKSMALLINT(POINTERARRAY)) { nInsts = __BYTES2OBJS__(__qSize(self) - OHDR_SIZE); } else { nInsts = __intVal(__ClassInstPtr(cls)->c_ninstvars); } if (! nInsts) { RETURN (false); } anyChange = false; for (i=0; ii_instvars[i] == anObject) { __InstPtr(self)->i_instvars[i] = newRef; __STORE(self, newRef); // __dumpObject__(self, __LINE__); anyChange = true; } } RETURN (anyChange); %}. " |v| v := Array with:1234 with:'hello' with:Array. v replaceReferencesTo:Array with:ByteArray. v inspect " "Modified: / 30-07-2013 / 21:48:06 / cg" ! ! !Object methodsFor:'testing'! ? defaultValue "a syntactic sugar-piece: if the receiver is nil, return the defaultValue; otherwise, return the receiver. This method is only redefined in UndefinedObject - therefore, the recevier is retuned here. Thus, if foo and bar are simple variables or constants, foo ? bar is the same as: (foo isNil ifTrue:[bar] ifFalse:[foo]) if they are message sends, the equivalent code is: [ |t1 t2| t1 := foo. t2 := bar. t1 isNil ifTrue:[t2] ifFalse:[t1] ] value Can be used to provide defaultValues to variables, as in: foo := arg ? #defaultValue Note: this method should never be redefined in classes other than UndefinedObject. Notice: This method is open coded (inlined) by the compiler(s) - redefining it may not work as expected." ^ self " 1 ? #default nil ? #default " "Created: / 4.11.1996 / 20:36:19 / cg" "Modified: / 19.5.1998 / 17:39:56 / cg" ! ?? defaultValue "a syntactic sugar-piece: much like ?, but sends #value to the argument if required. (i.e. it's the same as #ifNil:) If the receiver is nil, return the defaultValues value; otherwise, return the receiver. This method is only redefined in UndefinedObject - therefore, the receiver is retuned here. Thus, if foo and bar are simple variables or constants, foo ?? bar is the same as: (foo isNil ifTrue:[bar value] ifFalse:[foo]) if they are message sends, the equivalent code is: [ |t t2| t := foo. t isNil ifTrue:[bar value] ifFalse:[t] ] value Can be used to provide defaultValues to variables, as in: foo := arg ?? [ self computeDefault ] Note: this method should never be redefined in classes other than UndefinedObject. " ^ self " 1 ?? #default nil ?? #default 1 ?? [ self halt. 1 + 2 ] nil ?? [ self halt. 1 + 2 ] 1 ?? [Date today] nil ?? [Date today] " "Created: / 4.11.1996 / 20:36:19 / cg" "Modified: / 19.5.1998 / 17:42:56 / cg" ! ifNil:aBlockOrValue "return myself, or the result from evaluating the argument, if I am nil. This is much like #?, but sends #value to the argument in case of a nil receiver. Notice: This method is open coded (inlined) by the compiler(s) - redefining it may not work as expected." ^ self ! ifNil:nilBlockOrValue ifNotNil:notNilBlockOrValue "return the value of the first arg, if I am nil, the result from evaluating the 2nd argument, if I am not nil. Notice: This method is open coded (inlined) by the compiler(s) - redefining it may not work as expected." (notNilBlockOrValue isBlock and:[notNilBlockOrValue numArgs == 1]) ifTrue:[ ^ notNilBlockOrValue value:self. ]. ^ notNilBlockOrValue value ! ifNotNil:aBlockOrValue "return myself if nil, or the result from evaluating the argument, if I am not nil. Notice: This method is open coded (inlined) by the compiler(s) - redefining it may not work as expected." (aBlockOrValue isBlock and:[aBlockOrValue numArgs == 1]) ifTrue:[ ^ aBlockOrValue value:self. ]. ^ aBlockOrValue value ! ifNotNil:notNilBlockOrValue ifNil:nilBlockOrValue "return the value of the 2nd arg, if I am nil, the result from evaluating the 1st argument, if I am not nil. Notice: This method is open coded (inlined) by the compiler(s) - redefining it may not work as expected." (notNilBlockOrValue isBlock and:[notNilBlockOrValue numArgs == 1]) ifTrue:[ ^ notNilBlockOrValue value:self. ]. ^ notNilBlockOrValue value ! ifNotNilDo:aBlock "if the reciever is non-nil, return the value of aBlock, passing myself as argument. Otherwise do nothing and return nil." ^ aBlock value:self ! isArray "return true, if the receiver is some kind of array (or weakArray etc); false is returned here - the method is only redefined in Array." ^ false ! isAssociation "return true, if the receiver is some kind of association; false is returned here - the method is only redefined in Association." ^ false "Created: 14.5.1996 / 17:03:45 / cg" ! isBehavior "return true, if the receiver is describing another objects behavior. False is returned here - the method is only redefined in Behavior." ^ false ! isBlock "return true, if the receiver is some kind of block; false returned here - the method is only redefined in Block." ^ false ! isBoolean "return true, if the receiver is a boolean; false is returned here - the method is only redefined in Boolean." ^ false ! isByteArray "return true, if the receiver is some kind of bytearray; false is returned here - the method is only redefined in ByteArray." ^ false ! isByteCollection "return true, if the receiver is some kind of byte collection, i.e. #at: and #at:put: accesses a byte. This is different from 'self class isBytes', since e.g. in BitArray single bits are accessed, but it is implemented as variableBytes class. false is returned here - the method is only redefined in UninterpretedBytes." ^ false ! isCharacter "return true, if the receiver is some kind of character; false is returned here - the method is only redefined in Character." ^ false ! isClass "return true, if the receiver is some kind of class (real class, not just behavior); false is returned here - the method is only redefined in Class." ^ false ! isCollection "return true, if the receiver is some kind of collection; false is returned here - the method is only redefined in Collection." ^ false ! isColor "return true, if the receiver is some kind of color; false is returned here - the method is only redefined in Color." ^ false ! isCons "return true, if the receiver is a cons (pair); false is returned here - the method is only redefined in Cons." ^ false ! isContext "return true, if the receiver is some kind of Context; false returned here - the method is only redefined in Context." ^ false ! isDictionary "return true, if the receiver is some kind of dictionary; false returned here - the method is only redefined in Dictionary." ^ false ! isEmptyOrNil "return true if I am nil or an empty collection - return false here. (from Squeak)" ^ false "Created: / 13.11.2001 / 13:17:04 / cg" "Modified: / 13.11.2001 / 13:28:40 / cg" ! isException "answer true, if this is an Exception" ^ false "Created: / 17.11.2001 / 18:37:44 / cg" ! isExceptionCreator "return true, if the receiver can create exceptions, this includes #raise, #raiseRequest as well as the behavior of an exception handler, such as the #accepts: and #handles: messages" ^ false ! isExceptionHandler "return true, if the receiver responds to the exception handler protocol, especially to the #accepts: and #handles: messages" ^ false ! isExternalAddress "return true, if the receiver is some kind of externalAddress; false is returned here - the method is only redefined in ExternalAddress." ^ false "Created: / 22-12-2010 / 17:20:36 / cg" ! isExternalBytes ^ false ! isExternalLibraryFunction "return true, if the receiver is some kind of externalLibrary function; false is returned here - the method is only redefined in ExternalLibraryFunction." ^false ! isExternalStream "return true, if the receiver is some kind of externalStream; false is returned here - the method is only redefined in ExternalStream." ^false ! isFileStream "return true, if the receiver is some kind of fileStream; false is returned here - the method is only redefined in FileStream." ^false ! isFilename "return true, if the receiver is some kind of filename; false is returned here - the method is only redefined in Filename." ^false ! isFixedPoint "return true, if the receiver is some kind of fixedPoint number; false is returned here - the method is only redefined in FixedPoint." ^ false "Created: 5.11.1996 / 19:23:04 / cg" ! isFixedSize "return true if the receiver cannot grow easily (i.e. a grow may be expensive, since it involves a become:)" ^ true ! isFloat "return true, if the receiver is some kind of floating point number; false is returned here. Same as #isLimitedPrecisionReal, but a better name ;-)" ^ false "Modified: / 14.11.2001 / 14:57:46 / cg" ! isForm "return true, if the receiver is some kind of form; false is returned here - the method is only redefined in Form." ^ false ! isFraction "return true, if the receiver is some kind of fraction; false is returned here - the method is only redefined in Fraction." ^ false ! isHierarchicalItem "used to decide if the parent is a hierarchical item or the model" ^ false ! isImage "return true, if the receiver is some kind of image; false is returned here - the method is only redefined in Image." ^ false ! isImageOrForm "return true, if the receiver is some kind of image or form; false is returned here - the method is only redefined in Image and Form." ^ false ! isImmediate "return true if I am an immediate object i.e. I am represented in the pointer itself and no real object header/storage is used me. (currently, only SmallIntegers, some characters and nil return true)" ^ self class hasImmediateInstances "Created: 3.6.1997 / 12:00:18 / cg" ! isInteger "return true, if the receiver is some kind of integer number; false is returned here - the method is only redefined in Integer." ^ false ! isInterestConverter "return true if I am a kind of interest forwarder" ^ false ! isInternalByteStream "return true, if the receiver is some kind of Stream for reading bytes; false is returned here - the method is only redefined in PeekableStream." ^false "Created: / 30-05-2007 / 16:15:33 / cg" ! isJavaClass "return true, if this is a javaClass. false is returned here - the method is only redefined in JavaClass." ^ false "Created: / 26.3.1997 / 13:34:54 / cg" "Modified: / 8.5.1998 / 21:25:21 / cg" ! isJavaClassRef "return true, if this is a JavaClassRef. false is returned here - the method is only redefined in JavaClassRef." ^ false "Modified: / 8.5.1998 / 21:25:46 / cg" "Created: / 24.12.1999 / 01:46:28 / cg" ! isJavaContext "return true, if this is a javaContext. false is returned here - the method is only redefined in JavaContext." ^ false "Created: / 8.5.1998 / 21:24:27 / cg" "Modified: / 8.5.1998 / 21:25:35 / cg" ! isJavaMethod "return true, if this is a JavaMethod. false is returned here - the method is only redefined in JavaMethod." ^ false "Modified: / 8.5.1998 / 21:25:46 / cg" "Created: / 25.9.1999 / 23:26:12 / cg" ! isJavaMethodRef "return true, if this is a JavaMethodRef. false is returned here - the method is only redefined in JavaMethodRef." ^ false "Modified: / 8.5.1998 / 21:25:46 / cg" "Created: / 23.12.1999 / 19:44:51 / cg" ! isJavaObject "return true, if this is a javaObject. false is returned here - the method is only redefined in JavaObject." ^ false "Created: / 26.3.1997 / 13:34:48 / cg" "Modified: / 8.5.1998 / 21:25:46 / cg" ! isJavaScriptClass "return true, if this is a javaScriptClass. false is returned here - the method is only redefined in JavaScriptClass." ^ false ! isJavaScriptMetaclass "return true, if this is a javaScript Metaclass. false is returned here - the method is only redefined in JavaScriptMetaclass." ^ false ! isKindOf:aClass "return true, if the receiver is an instance of aClass or one of its subclasses, false otherwise. Advice: use of this to check objects for certain attributes/protocol should be avoided; it limits the reusability of your classes by limiting use to instances of certain classes and fences you into a specific inheritance hierarchy. Use check-methods to check an object for a certain attributes/protocol (such as #isXXXX, #respondsTo: or #isNumber). Using #isKindOf: is considered BAD STYLE. Advice2: Be aware, that using an #isXXX method is usually much faster than using #isKindOf:; because isKindOf: has to walk up all the superclass hierarchy, comparing every class on the way. Due to caching in the VM, a call to #isXXX is normally reached via a single function call. " %{ /* NOCONTEXT */ register OBJ thisClass; thisClass = __Class(self); while (thisClass != nil) { if (thisClass == aClass) { RETURN ( true ); } thisClass = __ClassInstPtr(thisClass)->c_superclass; } RETURN ( false ); %} "/ "/ the above code is equivalent to: "/ "/ thisClass := self class. "/ [thisClass notNil] whileTrue:[ "/ thisClass == aClass ifTrue:[^ true]. "/ thisClass := thisClass superclass "/ ]. "/ ^ false "/ ! isLayout "return true, if the receiver is some kind of layout; false is returned here - the method is only redefined in Layout." ^ false ! isLazyValue ^ false ! isLimitedPrecisionReal "return true, if the receiver is some kind of floating point number; false is returned here - the method is only redefined in LimitedPrecisionReal." ^ false ! isList "return true, if the receiver is some kind of list collection; false is returned here - the method is only redefined in List." ^ false "Created: / 11.2.2000 / 01:37:05 / cg" ! isLiteral "return true, if the receiver can be represented as a literal constant in ST syntax; false is returned here - the method is redefined in some classes." ^ false ! isMemberOf:aClass "return true, if the receiver is an instance of aClass, false otherwise. Advice: use of this to check objects for certain attributes/protocol should be avoided; it limits the reusability of your classes by limiting use to instances of a certain class. Use check-methods to check an object for a certain attributes/protocol (such as #isXXX, #respondsTo: or #isNumber); Using #isMemberOf: is considered BAD STYLE. Notice: This method is open coded (inlined) by the compiler(s) - redefining it may not work as expected." ^ (self class) == aClass ! isMeta "return true, if the receiver is some kind of metaclass; false is returned here - the method is only redefined in Metaclass." ^ false ! isMethod "return true, if the receiver is some kind of method; false returned here - the method is only redefined in Method." ^ false ! isMorph "return true, if the receiver is some kind of morph; false is returned here - the method is only redefined in Morph." ^ false ! isNameSpace "return true, if the receiver is a nameSpace. False is returned here - the method is only redefined in Namespace." ^ false "Created: / 11.10.1996 / 18:08:56 / cg" "Modified: / 8.5.1998 / 21:26:05 / cg" ! isNamespace "return true, if this is a nameSpace. false is returned here - the method is only redefined in Namespace." self obsoleteMethodWarning:'use #isNameSpace'. ^ self isNameSpace ! isNil "Return true, if the receiver is nil. Because isNil is redefined in UndefinedObject, the receiver is definitely not nil here, so unconditionally return false. Notice: This method is open coded (inlined) by the compiler(s) - redefining it may not work as expected." ^ false ! isNilOrEmptyCollection "return true if I am nil or an empty collection - false here. Obsolete, use isEmptyOrNil." ^ false "Modified: / 13.11.2001 / 13:28:06 / cg" ! isNonByteCollection "return true, if the receiver is some kind of collection, but not a String, ByteArray etc.; false is returned here - the method is redefined in Collection and UninterpretedBytes." ^ false " 21 isNonByteCollection 'abc' isNonByteCollection #'abc' isNonByteCollection #[1 2 3] isNonByteCollection #(1 2 3) isNonByteCollection " ! isNumber "return true, if the receiver is some kind of number; false is returned here - the method is only redefined in Number." ^ false ! isOrderedCollection "return true, if the receiver is some kind of ordered collection (or list etc); false is returned here - the method is only redefined in OrderedCollection." ^ false ! isPoint "return true, if the receiver is some kind of point; false is returned here - the method is only redefined in Point." ^ false ! isPrinterContext ^false ! isProgrammingLanguage "return true, if the receiver is a programming language. False is returned here - the method is only redefined in ProgrammingLanguage." ^ false "Created: / 21-07-2010 / 15:13:50 / Jan Vrany " ! isProjectDefinition "return true, if the receiver is a projectDefinition. False is returned here - the method is only redefined in ProjectDefinition." ^ false "Created: / 10-08-2006 / 16:24:53 / cg" ! isProxy "return true, if the receiver is a proxy for another (lazy loaded) object. False is returned here." ^ false "Created: / 21-11-2010 / 11:15:46 / cg" ! isRealNameSpace "return true, if the receiver is a nameSpace, but not Smalltalk (which is also a class). False is returned here - the method is redefined in Namespace and Smalltalk." ^ false "Created: / 10-11-2006 / 17:05:43 / cg" ! isRectangle "return true, if the receiver is some kind of rectangle; false is returned here - the method is only redefined in Rectangle." ^ false ! isRemoteObject "return true, if the receiver is some kind of remoteObject, false if its local - the method is only redefined in RemoteObject." ^ false "Created: 28.10.1996 / 15:18:45 / cg" "Modified: 28.10.1996 / 15:20:57 / cg" ! isSequenceable "return true, if the receiver is some kind of sequenceable collection; false is returned here - the method is only redefined in SequenceableCollection." ^ false ! isSequenceableCollection "OBSOLETE: use isSequenceable for ST-80 compatibility. This method is a historic leftover and will be removed soon ... (although its name is much better than #isSequenceable - sigh)" self obsoleteMethodWarning:'use #isSequenceable'. ^ false ! isSharedPool "return true, if the receiver is a sharedPool. False is returned here - the method is only redefined in SharedPool." ^ false ! isSocket "return true, if the receiver is some kind of socket; false returned here - the method is only redefined in Socket." ^ false "Created: / 17-08-2012 / 15:32:06 / Jan Vrany " ! isSocketAddress ^ false ! isSpecialInstrumentationInfoLiteral "return true, if the receiver is a special instrumentation info object as placed into the literal array of instrumented methods" ^ false "Created: / 07-08-2011 / 17:03:41 / cg" ! isStream "return true, if the receiver is some kind of stream; false is returned here - the method is only redefined in Stream." ^ false ! isString "return true, if the receiver is some kind of string; false is returned here - the method is only redefined in CharacterArray." ^ false ! isStringCollection "return true, if the receiver is some kind of stringCollection; false is returned here - the method is only redefined in StringCollection." ^ false ! isSymbol "return true, if the receiver is some kind of symbol; false is returned here - the method is only redefined in Symbol." ^ false ! isText "return true, if the receiver is some kind of text object; false is returned here - the method is only redefined in Text." ^ false "Created: 12.5.1996 / 10:56:50 / cg" ! isTextView "return true, if the receiver is some kind of textView; false is returned here - the method is only redefined in TextViews." ^ false "Modified (comment): / 08-09-2011 / 05:12:37 / cg" ! isTimestamp ^ false ! isTrait "Return true if the receiver is a trait. Note: Do not override in any class except TraitBehavior." ^ false "Created: / 04-09-2011 / 20:04:43 / cg" ! isUUID ^ false ! isValueModel "return true, if the receiver is some kind of valueModel; false is returned here - the method is only redefined in ValueModel." ^ false ! isVariable "return true if the receiver has indexed instance variables, false otherwise." ^ self class isVariable ! isVariableBinding "return true, if this is a binding for a variable. false is returned here - the method is only redefined in Binding." ^ false "Created: / 19.6.1997 / 17:38:44 / cg" "Modified: / 8.5.1998 / 21:26:55 / cg" ! isView "return true, if the receiver is some kind of view; false is returned here - the method is only redefined in View." ^ false ! notEmptyOrNil "Squeak compatibility: return true if I am neither nil nor an empty collection. Return true here." ^ true ! notNil "Return true, if the receiver is not nil. Because notNil is redefined in UndefinedObject, the receiver is definitely not nil here, so unconditionally return true. Notice: This method is open coded (inlined) by the compiler(s) - redefining it may not work as expected." ^ true ! ! !Object methodsFor:'tracing'! traceInto:aRequestor level:level from:referrer "double dispatch into tracer, passing my type implicitely in the selector" ^ aRequestor traceObject:self level:level from:referrer "Created: / 2.9.1999 / 09:05:17 / stefan" ! ! !Object methodsFor:'user interaction & notifications'! activityNotification:aString "this can be sent from deeply nested methods, which are going to perform some long-time activity. If there is a handler for the ActivityNotificationSignal signal, that one is raised, passing the argument. The handler should show this message whereever it likes, and proceed. If there is no handler, this is simply ignored. This is very useful to pass busy messages up to some higher level (typically a view) which likes to display that message in its label or a busy-box. It could also be put into some logfile or printed on the standard output/error." ActivityNotification isHandled ifTrue:[ ^ ActivityNotification raiseRequestWith:self errorString:aString ]. " nil activityNotification:'hello there' self activityNotification:'hello there' " " ActivityNotification handle:[:ex | ex errorString printCR. ex proceed. ] do:[ 'hello' printCR. self activityNotification:'doing some long time computation'. 'world' printCR. ] " "Modified: 16.12.1995 / 18:23:42 / cg" ! confirm:aString "open a modal yes-no dialog. Return true for yes, false for no. If no GUI is present (headless applications), true is returned. Someone in the sender chain may redefine the confirmation handler by handling the UserConfirmation." ^ UserConfirmation raiseRequestErrorString:aString " nil confirm:'hello' self confirm:'hello' " ! confirm:aString orCancel:cancelBlock "launch a confirmer, which allows user to enter yes, no or cancel. return true for yes, false for no, or the value from cancelBlock for cancel. If no GUI is present (headless applications), cancelBlock is returned." |answer| answer := self confirmWithCancel:aString. answer isNil ifTrue:[ ^ cancelBlock value ]. ^ answer " self confirm:'hello' orCancel:[self halt] " "Modified: 20.5.1996 / 10:28:40 / cg" ! confirmWithCancel:aString "launch a confirmer, which allows user to enter yes, no or cancel. return true for yes, false for no, nil for cancel. If no GUI is present (headless applications), nil is returned. Someone in the sender chain may redefine the confirmation handler by handling the UserConfirmation." ^ self confirmWithCancel:aString defaultAnswer:nil " nil confirmWithCancel:'hello' self confirmWithCancel:'hello' " ! confirmWithCancel:aString defaultAnswer:defaultAnswerOrNil "launch a confirmer, which allows user to enter yes, no or cancel. return true for yes, false for no, nil for cancel. If no GUI is present (headless applications), nil is returned. Someone in the sender chain may redefine the confirmation handler by handling the UserConfirmation." ^ UserConfirmation new defaultAnswer:defaultAnswerOrNil; canCancel:true; errorString:aString; raiseRequest " nil confirmWithCancel:'hello' defaultAnswer:true self confirmWithCancel:'hello' defaultAnswer:false " ! errorNotify:aString "launch a Notifier, showing top stack, telling user something and give user a chance to enter debugger." ^ self errorNotify:aString from:thisContext sender allowDebug:true mayProceed:true " nil errorNotify:'hello there' self errorNotify:'hello there' " "Modified: / 16.11.2001 / 15:36:49 / cg" ! errorNotify:aString from:aContext "launch a Notifier, showing top stack (above aContext), telling user something and give user a chance to enter debugger." ^ self errorNotify:aString from:aContext allowDebug:true mayProceed:true "Modified: / 17.8.1998 / 10:09:27 / cg" ! errorNotify:aString from:aContext allowDebug:allowDebug "launch a Notifier, showing top stack (above aContext), telling user something and give user a chance to enter debugger." ^ self errorNotify:aString from:aContext allowDebug:allowDebug mayProceed:true ! errorNotify:aString from:aContext allowDebug:allowDebug mayProceed:mayProceed "launch a Notifier, showing top stack (above aContext), telling user something and optionally give the user a chance to enter debugger." |currentScreen con sender action boxLabels boxValues default s| Smalltalk isInitialized ifFalse:[ 'errorNotification: ' print. aString printCR. con := aContext ? thisContext methodHome. con sender printAllLevels:10. ^ nil ]. (Dialog isNil or:[Screen isNil or:[(currentScreen := Screen current) isNil or:[currentScreen isOpen not]]]) ifTrue:[ " on systems without GUI, simply show the message on the Transcript and abort. " Transcript showCR:aString. AbortOperationRequest raise. "not reached" ^ nil ]. Processor activeProcessIsSystemProcess ifTrue:[ action := #debug. sender := aContext. Debugger isNil ifTrue:[ '****************** Cought Error while in SystemProcess ****************' errorPrintCR. aString errorPrintCR. Exception handle:[:ex | 'Cought recursive error while printing backtrace:' errorPrintCR. ex description errorPrintCR. ] do:[ thisContext fullPrintAll. ]. action := #abort. ]. ] ifFalse:[ Dialog autoload. "in case it's autoloaded" Error handle:[:ex | "/ a recursive error - quickly enter debugger "/ this happened, when I corrupted the Dialog class ... ('Object [error]: ' , ex description , ' caught in errorNotification') errorPrintCR. action := #debug. ex return. ] do:[ |s| sender := aContext. sender isNil ifTrue:[ sender := thisContext methodHome sender. ]. con := sender. "/ skip intermediate (signal & exception) contexts DebugView notNil ifTrue:[ con := DebugView interestingContextFrom:sender ]. "/ show the first few contexts s := CharacterWriteStream with:aString. s cr; cr. s nextPutLine:'Calling Chain:'. s nextPutLine:'--------------------------------------------------------------'. 1 to:25 do:[:n | con notNil ifTrue:[ con printOn:s. s cr. con := con sender ] ]. mayProceed ifTrue:[ boxLabels := #('Proceed'). boxValues := #(#proceed). default := #proceed. ] ifFalse:[ boxLabels := #(). boxValues := #(). ]. AbortOperationRequest isHandled ifTrue:[ default := #abort. boxLabels := boxLabels , #('Abort'). boxValues := boxValues , #(#abort). true "allowDebug" ifTrue:[ boxLabels := boxLabels , #('Copy Trace and Abort'). boxValues := boxValues , #(#copyAndAbort). ] ] ifFalse:[ mayProceed "and:[allowDebug]" ifTrue:[ boxLabels := boxLabels , #('Copy Trace and Proceed'). boxValues := boxValues , #(#copyAndProceed). ]. ]. (allowDebug and:[Debugger notNil]) ifTrue:[ boxLabels := boxLabels , #('Debug'). boxValues := boxValues , #(#debug). default := #debug. ]. action := Dialog choose:s contents label:('Exception [' , Processor activeProcess nameOrId , ']') image:WarningBox errorIconBitmap labels:boxLabels values:boxValues default:default onCancel:nil. ]. ]. action == #debug ifTrue:[ ^ Debugger enter:sender withMessage:aString mayProceed:mayProceed ]. action == #proceed ifTrue:[ ^ nil. ]. (action == #copyAndProceed or:[action == #copyAndAbort]) ifTrue:[ s := '' writeStream. Exception handle:[:ex | 'Cought recursive error while printing backtrace' errorPrintCR. ] do:[ sender fullPrintAllOn:s. ]. currentScreen rootView setClipboardText:s contents. action == #copyAndProceed ifTrue:[ ^ nil ]. ]. AbortOperationRequest raise. "not reached" " nil errorNotify:'hello there' self errorNotify:'hello there' " "Created: / 17-08-1998 / 10:09:26 / cg" "Modified: / 08-08-2011 / 11:26:17 / sr" "Modified: / 05-12-2011 / 03:50:59 / cg" ! information:aString "launch an InfoBox, telling user something. These info-boxes can be suppressed by handling UserNotification or InformationSignal and proceeding in the handler. Use #notify: for more important messages. If nobody handles the exception, the default action of UserNotification pops up an info dialog." UserInformation raiseRequestWith:self errorString:aString " nil information:'hello there' self information:'hello there' " " InformationSignal handle:[:ex | 'no box popped' printCR. ex proceed. ] do:[ 'hello' printCR. self information:'some info'. 'world' printCR. ] " "Modified: 24.11.1995 / 22:29:49 / cg" ! notify:aString "launch a Notifier, telling user something. Use #information: for ignorable messages. If nobody handles the exception, the dafault action of UserNotification pops up a warn dialog." Smalltalk isInitialized ifFalse:[ "/ thisContext fullPrintAll. 'information: ' print. aString printCR. ^ self ]. UserNotification raiseRequestWith:self errorString:aString. " nil notify:'hello there' self notify:'hello there' " "Modified: 20.5.1996 / 10:28:48 / cg" ! warn:aString "launch a WarningBox, telling user something. These warn-boxes can be suppressed by handling the UserNotification- or WarningSignal and proceeding in the handler. If nobody handles the exception, the dafault action of Warning pops up a warn dialog." Warning raiseRequestWith:self errorString:aString " nil warn:'hello there' self warn:'hello there' " " Warning handle:[:ex | Transcript showCR:ex description. ex proceed. ] do:[ 'hello' printCR. self warn:'some info'. 'world' printCR. ] " "Modified: 20.5.1996 / 10:28:53 / cg" ! ! !Object methodsFor:'visiting'! acceptVisitor:aVisitor "double-dispatch onto a Visitor." ^ self acceptVisitor:aVisitor with:nil ! acceptVisitor:aVisitor with:aParameter "double-dispatch onto a Visitor. Subclasses redefine this" ^ aVisitor visitObject:self with:aParameter ! ! !Object class methodsFor:'documentation'! version ^ '$Header: /cvs/stx/stx/libbasic/Object.st,v 1.743 2013-12-06 14:40:10 stefan Exp $' ! version_CVS ^ '$Header: /cvs/stx/stx/libbasic/Object.st,v 1.743 2013-12-06 14:40:10 stefan Exp $' ! version_SVN ^ '$ Id: Object.st 10643 2011-06-08 21:53:07Z vranyj1 $' ! ! Object initialize!