[llvm-commits] CVS: llvm-java/docs/object-layout.txt

[Alkis Evlogimenos]

Changes in directory llvm-java/docs:

object-layout.txt updated: 1.4 -> 1.5
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Log message:

Update to how typeinfo is implemented.


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Diffs of the changes:  (+6 -4)

Index: llvm-java/docs/object-layout.txt
diff -u llvm-java/docs/object-layout.txt:1.4 llvm-java/docs/object-layout.txt:1.5
--- llvm-java/docs/object-layout.txt:1.4	Fri Sep 10 15:15:27 2004
+++ llvm-java/docs/object-layout.txt	Fri Sep 10 15:21:16 2004
@@ -43,15 +43,17 @@
 used to differentiate between class typeinfo's and interface
 typeinfo's. More specifically if interfaces == -1 then this typeinfo
 is for an interface and the lastIface field is the unique number of
-this interface in the objects interfaces array.
+this interface in the objects interfaces array. The field lastIface is
+the max index of all implemented interfaces. For a class that doesn't
+implement any it is -1.
 
 struct llvm_java_object_typeinfo {
   unsigned depth;
   struct llvm_java_object_vtable** vtables;
-  unsigned lastIface;
+  int lastIface;
   union {
     struct llvm_java_object_vtable** interfaces;
-    unsigned interfaceFlag;
+    int interfaceFlag;
   };
 };
 
@@ -64,7 +66,7 @@
   if (objClazz == clazz)
     return 1;
   // we are checking against a class' typeinfo
-  if (clazz->typeinfo.interfaceFlag != (unsigned)-1)
+  if (clazz->typeinfo.interfaceFlag != -1)
     return objClazz->typeinfo.depth > clazz->typeinfo.depth &&
            objClazz->typeinfo.vtables[clazz->typeinfo.depth] == clazz;
   // otherwise we are checking against an interface's typeinfo