diff -u a/source/lib/talloc/talloc.h b/source/lib/talloc/talloc.h
--- a/source/lib/talloc/talloc.h	2009-08-06 14:04:30.000000000 -0700
+++ b/source/lib/talloc/talloc.h	2009-08-05 09:34:46.000000000 -0700
@@ -94,6 +94,7 @@
 #define talloc_array(ctx, type, count) (type *)_talloc_array(ctx, sizeof(type), count, #type)
 #define talloc_array_size(ctx, size, count) _talloc_array(ctx, size, count, __location__)
 #define talloc_array_ptrtype(ctx, ptr, count) (_TALLOC_TYPEOF(ptr))talloc_array_size(ctx, sizeof(*(ptr)), count)
+#define talloc_array_length(ctx) (talloc_get_size(ctx)/sizeof(*ctx))
 
 #define talloc_realloc(ctx, p, type, count) (type *)_talloc_realloc_array(ctx, p, sizeof(type), count, #type)
 #define talloc_realloc_size(ctx, ptr, size) _talloc_realloc(ctx, ptr, size, __location__)