RNA functions can now return dynamic arrays (float, int/boolean). RNA handles freeing memory.

Example code: http://pastebin.mozilla.org/662154.

source/blender/python/intern/bpy_rna.c

@@ -44,6 +44,8 @@
 #include "DNA_scene_types.h"
 #include "ED_keyframing.h"
 
+#include "rna_internal_types.h"	/* PropertyRNA */
+
 #define USE_MATHUTILS
 
 #ifdef USE_MATHUTILS
@@ -1792,6 +1794,10 @@ PyObject *pyrna_param_to_py(PointerRNA *ptr, PropertyRNA *prop, void *data)
 		/* resolve the array from a new pytype */
 		ret = PyTuple_New(len);
 
+		/* for return values, data is a pointer to an array, not first element pointer */
+		if (prop->flag & PROP_DYNAMIC_ARRAY)
+			data = *((char**)data);
+
 		switch (type) {
 		case PROP_BOOLEAN:
 			for(a=0; a<len; a++)