iterate over refcursor

hi

I got 2 functions write in pl/pgsql.
In the first function, i create a cursor and i need to use it into an other
function
so the parameter is a refcursor.

the code :
1st function :
DECLARE
childCursor CURSOR FOR select * from ...
BEGIN
SORT_CHILDREN(childCursor);
END;

2nd function :
CREATE OR REPLACE FUNCTION SORT_CHILDREN(refCursor) RETURNS int4[] AS
$$
DECLARE
childCursor ALIAS FOR $1;
childRecord adoc.xdb_child%ROWTYPE;
BEGIN
FOR childRecord IN childCursor LOOP
...
END LOOP;
RETURN ...;
END;
$$ LANGUAGE plpgsql;

But it doesn't work.....

My problem is : how to iterate over a refcursor in a function ?

thanks in advance

Will