On Mon, Apr 8, 2024 at 11:33 AM Jean Louis Faucher <jfaucher...@gmail.com> wrote:
> Thanks! > > Returns an instance from the integer cache maintained by the > RexxIntegerClass object. These are all marked by the live() method on the > object, so RexxMemory doesn't need to do anything special. > > > I never realised that the RexxInteger has a (what? metaclass?) different > from RexxClass.… > And apparently, it’s the only class to be like that. > That's because it has some additional static fields that need to be marked for garbage collection. > > My notes: > > All classes declare they class using CLASS_CREATE > except RexxInteger and NumberString which use CLASS_CREATE_SPECIAL > and except RexxClass, probably for bootstrap. > CLASS_CREATE_SPECIAL(NumberString, "String", RexxClass); > CLASS_CREATE_SPECIAL(Integer, "String", *RexxIntegerClass*); > > RexxClass *NumberString::classInstance = OREF_NULL; > *RexxIntegerClass* *RexxInteger::classInstance = OREF_NULL; > The NumberString and Integer classes are special optimizations for doing arithmetic. The instances masquerade as string objects, but from an ooRexx user standpoint, they don't exist. > > > Only the file IntegerClass.cpp has 2 live methods: > void RexxInteger::live(size_t liveMark) > void RexxIntegerClass::live(size_t liveMark) > That's because it has additional marking to do. NumberString has no such requirement, so it can be created from a standard Class instance. > > > I noticed that all the class are doing > memory_mark(objectVariables); > instead of doing > RexxObject::live(liveMark) > > This is aligned with the comment in ObjectClass.cpp > * Other exported classes that inherit from Object are > * also expected to mark this field. > but to not forget if other attributes are added to RexxObject in the > future. > > _______________________________________________ > Oorexx-devel mailing list > Oorexx-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/oorexx-devel >
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