Tcl Source Code

    /* Stand up a phony class for bootstrapping. */
    fPtr->objectCls = &fakeCls;
    /* referenced in AllocClass to increment the refCount. */
    fakeCls.thisPtr = &fakeObject;

    fPtr->objectCls = AllocClass(interp,
	    AllocObject(interp, "object", (Namespace *)fPtr->ooNs, NULL));


    /* Corresponding TclOODecrRefCount in KillFoudation */

    AddRef(fPtr->objectCls->thisPtr);


    /* This is why it is unnecessary in this routine to replace the
     * incremented reference count of fPtr->objectCls that was swallowed by
     * fakeObject. */
    fPtr->objectCls->superclasses.num = 0;
    ckfree(fPtr->objectCls->superclasses.list);

    fPtr->objectCls->superclasses.list = NULL;

    /* special initialization for the primordial objects */
    fPtr->objectCls->thisPtr->flags |= ROOT_OBJECT;
    fPtr->objectCls->flags |= ROOT_OBJECT;

    fPtr->classCls = AllocClass(interp,
	    AllocObject(interp, "class", (Namespace *)fPtr->ooNs, NULL));
    /* Corresponding TclOODecrRefCount in KillFoudation */
    AddRef(fPtr->classCls->thisPtr);

    /*
     * Increment reference counts for each reference because these
     * relationships can be dynamically changed.
     *
     * Corresponding TclOODecrRefCount for all incremented refcounts is in
     * KillFoundation.
     */

    /* Rewire bootstrapped objects. */
    fPtr->objectCls->thisPtr->selfCls = fPtr->classCls;
    AddRef(fPtr->objectCls->thisPtr->selfCls->thisPtr);

    fPtr->classCls->thisPtr->selfCls = fPtr->classCls;
    AddRef(fPtr->classCls->thisPtr->selfCls->thisPtr);

    fPtr->classCls->thisPtr->flags |= ROOT_CLASS;
    fPtr->classCls->flags |= ROOT_CLASS;

    /* Standard initialization for new Objects */
    TclOOAddToInstances(fPtr->objectCls->thisPtr, fPtr->classCls);
    TclOOAddToInstances(fPtr->classCls->thisPtr, fPtr->classCls);

    ClientData clientData,	/* Pointer to the OO system foundation
				 * structure. */
    Tcl_Interp *interp)		/* The interpreter containing the OO system
				 * foundation. */
{
    Foundation *fPtr = GetFoundation(interp);










    TclDecrRefCount(fPtr->unknownMethodNameObj);
    TclDecrRefCount(fPtr->constructorName);
    TclDecrRefCount(fPtr->destructorName);
    TclDecrRefCount(fPtr->clonedName);
    TclDecrRefCount(fPtr->defineName);
    if (fPtr->objectCls->thisPtr->selfCls != NULL) {
	TclOODecrRefCount(fPtr->objectCls->thisPtr->selfCls->thisPtr);
    }
    if (fPtr->classCls->thisPtr->selfCls != NULL) {
	TclOODecrRefCount(fPtr->classCls->thisPtr->selfCls->thisPtr);
    }
    TclOODecrRefCount(fPtr->objectCls->thisPtr);
    TclOODecrRefCount(fPtr->classCls->thisPtr);

    ckfree(fPtr);
}

/*
 * ----------------------------------------------------------------------
 *
 * AllocObject --

	 * Could not make that namespace, so we make another. But first we
	 * have to get rid of the error message from Tcl_CreateNamespace,
	 * since that's something that should not be exposed to the user.
	 */

	Tcl_ResetResult(interp);
    }

    ((Namespace *)oPtr->namespacePtr)->refCount++;

    /*
     * Make the namespace know about the helper commands. This grants access
     * to the [self] and [next] commands.
     */

  configNamespace:

    TclOODecrRefCount(oPtr);
    return;
}

/*
 * ----------------------------------------------------------------------
 *
 * DeleteDescendants --
 *
 *	Delete all descendants of a particular class.

 *
 * ----------------------------------------------------------------------
 */

static void
DeleteDescendants(
    Tcl_Interp *interp,		/* The interpreter containing the class. */
    Object *oPtr)		/* The object representing the class. */
{
    Class *clsPtr = oPtr->classPtr, *subclassPtr, *mixinSubclassPtr;
    Object *instancePtr;


    /*
     * Squelch classes that this class has been mixed into.
     */

    if (clsPtr->mixinSubs.num > 0) {
	while (clsPtr->mixinSubs.num > 0) {
	    mixinSubclassPtr = clsPtr->mixinSubs.list[clsPtr->mixinSubs.num-1];
	    /* This condition also covers the case where mixinSubclassPtr ==
	     * clsPtr
	     */
	    if (!Deleted(mixinSubclassPtr->thisPtr)) {
		Tcl_DeleteCommandFromToken(interp,
			mixinSubclassPtr->thisPtr->command);
	    }
	    TclOORemoveFromMixinSubs(mixinSubclassPtr, clsPtr);
	}
    }
    if (clsPtr->mixinSubs.size > 0) {
	ckfree(clsPtr->mixinSubs.list);
	clsPtr->mixinSubs.size = 0;
    }
    /*
     * Squelch subclasses of this class.
     */

    if (clsPtr->subclasses.num > 0) {
	while (clsPtr->subclasses.num > 0) {
	    subclassPtr = clsPtr->subclasses.list[clsPtr->subclasses.num-1];
	    if (!Deleted(subclassPtr->thisPtr) && !IsRoot(subclassPtr)) {
		Tcl_DeleteCommandFromToken(interp, subclassPtr->thisPtr->command);
	    }
	    TclOORemoveFromSubclasses(subclassPtr, clsPtr);
	}
    }
    if (clsPtr->subclasses.size > 0) {
	ckfree(clsPtr->subclasses.list);
	clsPtr->subclasses.list = NULL;
	clsPtr->subclasses.size = 0;
    }

    /*
     * Squelch instances of this class (includes objects we're mixed into).
     */

    if (clsPtr->instances.num > 0) {
	while (clsPtr->instances.num > 0) {
	    instancePtr = clsPtr->instances.list[clsPtr->instances.num-1];
	    /* This condition also covers the case where instancePtr == oPtr */
	    if (!Deleted(instancePtr) && !IsRoot(instancePtr)) {
		Tcl_DeleteCommandFromToken(interp, instancePtr->command);
	    }
	    TclOORemoveFromInstances(instancePtr, clsPtr);
	}
    }
    if (clsPtr->instances.size > 0) {
	ckfree(clsPtr->instances.list);
	clsPtr->instances.list = NULL;
	clsPtr->instances.size = 0;
    }
}
	

/*
 * ----------------------------------------------------------------------
 *
 * ReleaseClassContents --
 *
 *	Tear down the special class data structure, including deleting all
 *	dependent classes and objects.
 *
 * ----------------------------------------------------------------------
 */

static void
ReleaseClassContents(
    Tcl_Interp *interp,		/* The interpreter containing the class. */
    Object *oPtr)		/* The object representing the class. */
{
    FOREACH_HASH_DECLS;

	    TclDecrRefCount(filterObj);
	}
	ckfree(clsPtr->filters.list);
	clsPtr->filters.list = NULL;
	clsPtr->filters.num = 0;
    }
















    /*
     * Squelch our metadata.
     */

    if (clsPtr->metadataPtr != NULL) {
	Tcl_ObjectMetadataType *metadataTypePtr;
	ClientData value;

	FOREACH_HASH(metadataTypePtr, value, clsPtr->metadataPtr) {
	    metadataTypePtr->deleteProc(value);
	}
	Tcl_DeleteHashTable(clsPtr->metadataPtr);
	ckfree(clsPtr->metadataPtr);
	clsPtr->metadataPtr = NULL;
    }

    if (clsPtr->mixins.num) {
	FOREACH(tmpClsPtr, clsPtr->mixins) {
	    TclOORemoveFromMixinSubs(clsPtr, tmpClsPtr);
	}
	ckfree(clsPtr->mixins.list);
    }

    if (clsPtr->superclasses.num > 0) {
	FOREACH(tmpClsPtr, clsPtr->superclasses) {
	    TclOORemoveFromSubclasses(clsPtr, tmpClsPtr);
	    TclOODecrRefCount(tmpClsPtr->thisPtr);
	}
	ckfree(clsPtr->superclasses.list);
	clsPtr->superclasses.num = 0;
	clsPtr->superclasses.list = NULL;
    }

    FOREACH_HASH_VALUE(mPtr, &clsPtr->classMethods) {
	TclOODelMethodRef(mPtr);
    }
    Tcl_DeleteHashTable(&clsPtr->classMethods);
    TclOODelMethodRef(clsPtr->constructorPtr);

     * Splice the object out of its context. After this, we must *not* call
     * methods on the object.
     */

    /* To do: Should this be protected with a * !IsRoot() condition?  */ 
    TclOORemoveFromInstances(oPtr, oPtr->selfCls);

    if (oPtr->mixins.num > 0) {
	FOREACH(mixinPtr, oPtr->mixins) {
	    TclOORemoveFromInstances(oPtr, mixinPtr);
	}

	ckfree(oPtr->mixins.list);
    }

    FOREACH(filterObj, oPtr->filters) {
	TclDecrRefCount(filterObj);
    }
    if (i) {

	ReleaseClassContents(interp, oPtr);
    }

    /*
     * Delete the object structure itself.
     */

    TclNsDecrRefCount((Namespace *)oPtr->namespacePtr);
    oPtr->namespacePtr = NULL;
    TclOODecrRefCount(oPtr->selfCls->thisPtr);
    oPtr->selfCls = NULL;
    TclOODecrRefCount(oPtr);
    return;
}

/*
 * ----------------------------------------------------------------------
 *
 * TclOODecrRef --
 *
 *	Decrement the refcount of an object and deallocate storage then object
 *	is no longer referenced.  Returns 1 if storage was deallocated, and 0
 *	otherwise.
 *
 * ----------------------------------------------------------------------
 */
int TclOODecrRefCount(Object *oPtr) {
    if (oPtr->refCount-- <= 1) {

	if (oPtr->classPtr != NULL) {





	    ckfree(oPtr->classPtr);
	}
	ckfree(oPtr);
	return 1;
    }
    return 0;
}

TclOORemoveFromInstances(
    Object *oPtr,		/* The instance to remove. */
    Class *clsPtr)		/* The class (possibly) containing the
				 * reference to the instance. */
{
    int i, res = 0;
    Object *instPtr;




    FOREACH(instPtr, clsPtr->instances) {
	if (oPtr == instPtr) {
	    RemoveItem(Object, clsPtr->instances, i);
	    TclOODecrRefCount(oPtr);
	    res++;
	    break;

TclOORemoveFromSubclasses(
    Class *subPtr,		/* The subclass to remove. */
    Class *superPtr)		/* The superclass to possibly remove the
				 * subclass reference from. */
{
    int i, res = 0;
    Class *subclsPtr;




    FOREACH(subclsPtr, superPtr->subclasses) {
	if (subPtr == subclsPtr) {
	    RemoveItem(Class, superPtr->subclasses, i);
	    TclOODecrRefCount(subPtr->thisPtr);
	    res++;
	}

    Class *subPtr,		/* The subclass to remove. */
    Class *superPtr)		/* The superclass to possibly remove the
				 * subclass reference from. */
{
    int i, res = 0;
    Class *subclsPtr;





    FOREACH(subclsPtr, superPtr->mixinSubs) {
	if (subPtr == subclsPtr) {
	    RemoveItem(Class, superPtr->mixinSubs, i);
	    TclOODecrRefCount(subPtr->thisPtr);
	    res++;
	    break;
	}

    /*
     * Create the object.
     */

    oPtr = AllocObject(interp, simpleName, nsPtr, nsNameStr);
    oPtr->selfCls = classPtr;
    AddRef(classPtr->thisPtr);
    TclOOAddToInstances(oPtr, classPtr);
    /*
     * Check to see if we're really creating a class. If so, allocate the
     * class structure as well.
     */

    if (TclOOIsReachable(fPtr->classCls, classPtr)) {

		    ckalloc(sizeof(Class *) * clsPtr->superclasses.num);
	}
	memcpy(cls2Ptr->superclasses.list, clsPtr->superclasses.list,
		sizeof(Class *) * clsPtr->superclasses.num);
	cls2Ptr->superclasses.num = clsPtr->superclasses.num;
	FOREACH(superPtr, cls2Ptr->superclasses) {
	    TclOOAddToSubclasses(cls2Ptr, superPtr);

	    /* For the new item in cls2Ptr->superclasses that memcpy just
	     * created
	     */
	    AddRef(superPtr->thisPtr);
	}

	/*
	 * Duplicate the source class's filters.
	 */

	DUPLICATE(cls2Ptr->filters, clsPtr->filters, Tcl_Obj *);

    /*
     * Set the object's class.
     */

    if (oPtr->selfCls != clsPtr) {

	TclOORemoveFromInstances(oPtr, oPtr->selfCls);
	TclOODecrRefCount(oPtr->selfCls->thisPtr);

	oPtr->selfCls = clsPtr;
	AddRef(oPtr->selfCls->thisPtr);
	TclOOAddToInstances(oPtr, oPtr->selfCls);

	if (oPtr->classPtr != NULL) {
	    BumpGlobalEpoch(interp, oPtr->classPtr);
	} else {
	    oPtr->epoch++;
	}
    }
    return TCL_OK;

	superclasses = ckrealloc(superclasses, sizeof(Class *));
	if (TclOOIsReachable(oPtr->fPtr->classCls, oPtr->classPtr)) {
	    superclasses[0] = oPtr->fPtr->classCls;
	} else {
	    superclasses[0] = oPtr->fPtr->objectCls;
	}
	superc = 1;

	AddRef(superclasses[0]->thisPtr);
    } else {
	for (i=0 ; i<superc ; i++) {
	    superclasses[i] = GetClassInOuterContext(interp, superv[i],
		    "only a class can be a superclass");
	    if (superclasses[i] == NULL) {
		i--;

	}
	ckfree((char *) oPtr->classPtr->superclasses.list);
    }
    oPtr->classPtr->superclasses.list = superclasses;
    oPtr->classPtr->superclasses.num = superc;
    FOREACH(superPtr, oPtr->classPtr->superclasses) {
	TclOOAddToSubclasses(oPtr->classPtr, superPtr);


    }
    BumpGlobalEpoch(interp, oPtr->classPtr);

    return TCL_OK;
}

/*

test oo-0.4 {basic test of OO's ability to clean up its initial state} -body {
    leaktest {
	oo::class create foo
	foo new
	foo destroy
    }
} -constraints memory -result 0
test oo-0.5.1 {testing object foundation cleanup} memory {
    leaktest {
	interp create foo
	interp delete foo
    }
} 0
test oo-0.5.2 {testing literal leak on interp delete} memory {
    leaktest {
	interp create foo
	foo eval {oo::object new}
	interp delete foo
    }
} 0
test oo-0.6 {cleaning the core class pair; way #1} -setup {