anchor.diff:  ;; TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
   ;; SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   
  -;; $Id: gcallback.lisp,v 1.41 2007-04-06 14:31:43 espen Exp $
  +;; $Id: gcallback.lisp,v 1.42 2007-05-10 20:25:09 espen Exp $
   
   (in-package "GLIB")
   
  
positive.code:   (detail quark)
    (closure (or null pointer))
    (func (or null pointer))
    (data unsigned-long))
  
  (defbinding signal-handler-disconnect () nil
    (instance ginstance)
  
negative.code:     (closure-set-meta-marshal gclosure callback-id callback)
      gclosure))
  
  (defun make-callback-closure (function &optional (marshaller signal-handler-marshal))
    (let ((callback-id (register-callback-function function)))
      (values
       (callback-closure-new callback-id marshaller user-data-destroy-callback)
  