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Fix setting the superclass for metaclasses correctly.

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This commit is contained in:
theraven 2010-07-21 16:08:01 +00:00
parent 2cc96a6f7e
commit 9986294a51
1 changed files with 10 additions and 4 deletions
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14
class_table.c
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@ -190,6 +190,8 @@ BOOL objc_resolve_class(Class cls)
// If this class has no superclass, use [NS]Object
Class super = root_class;
Class superMeta = root_class;
Class meta = cls->isa;
if (NULL != cls->super_class)
{
// Resolve the superclass if it isn't already resolved
@ -201,18 +203,22 @@ BOOL objc_resolve_class(Class cls)
superMeta = super->isa;
// Set the superclass pointer for the class and the superclass
cls->super_class = super;
cls->isa->super_class = super->isa;
}
// Don't make the root class a subclass of itself
if (cls != super)
{
// Set up the class links
cls->sibling_class = super->subclass_list;
super->subclass_list = cls;
// Set up the metaclass links
cls->isa->sibling_class = superMeta->subclass_list;
superMeta->subclass_list = cls->isa;
}
// Make the root class the superclass of the metaclass (e.g. NSObject is
// the superclass of all metaclasses)
meta->super_class = superMeta;
// Set up the metaclass links
meta->sibling_class = superMeta->subclass_list;
superMeta->subclass_list = meta;
// Mark this class (and its metaclass) as resolved
objc_set_class_flag(cls, objc_class_flag_resolved);
objc_set_class_flag(cls->isa, objc_class_flag_resolved);