Removed circular object references in signal handler closures

[clg] / glib / gcallback.lisp

diff --git a/glib/gcallback.lisp b/glib/gcallback.lisp
index 357535d94b434cacfdda31a3e6511425fb3699dc..c25f62b952feccdc41506ab447b17431b85da961 100644 (file)
--- a/glib/gcallback.lisp
+++ b/glib/gcallback.lisp
@@ -20,7 +20,7 @@
 ;; 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 1.49 2008-04-11 20:51:45 espen Exp $
+;; $Id: gcallback.lisp,v 1.50 2008-05-06 00:04:42 espen Exp $
 
 (in-package "GLIB")
 
@@ -453,28 +453,34 @@ (defmethod signal-connect ((gobject gobject) signal function
 :REMOVE is non NIL, the handler will be removed after beeing invoked
 once. ARGS is a list of additional arguments passed to the callback
 function."
-(let* ((signal-id (compute-signal-id gobject signal))
-       (detail-quark (if detail (quark-intern detail) 0))
-       (signal-stop-emission
-       #'(lambda ()
-           (%signal-stop-emission gobject signal-id detail-quark)))
-       (callback (compute-signal-function gobject signal function object args))
-       (wrapper #'(lambda (&rest args)
-                   (let ((*signal-stop-emission* signal-stop-emission))
-                     (apply callback args)))))
-      (multiple-value-bind (closure-id callback-id)
-         (make-callback-closure wrapper signal-handler-marshal)
-       (let ((handler-id (%signal-connect-closure-by-id 
-                          gobject signal-id detail-quark closure-id after)))
-         (when remove
-           (update-user-data callback-id
-            #'(lambda (&rest args)
+  (let* ((signal-id (compute-signal-id gobject signal))
+        (detail-quark (if detail (quark-intern detail) 0))
+        (callback 
+         (compute-signal-function gobject signal function object args))
+        (wrapper 
+         #'(lambda (&rest args)
+             (let ((*signal-stop-emission*
+                    #'(lambda ()
+                        (%signal-stop-emission (first args) 
+                         signal-id detail-quark))))
+               (apply callback args)))))
+    (multiple-value-bind (closure-id callback-id)
+       (make-callback-closure wrapper signal-handler-marshal)
+      (let ((handler-id (%signal-connect-closure-by-id 
+                        gobject signal-id detail-quark closure-id after)))
+       (when remove
+         (update-user-data callback-id
+          #'(lambda (&rest args)
+              (let ((gobject (first args)))
                 (unwind-protect
-                    (let ((*signal-stop-emission* signal-stop-emission))
-                      (apply callback args))
+                     (let ((*signal-stop-emission*
+                            #'(lambda ()
+                                (%signal-stop-emission gobject 
+                                 signal-id detail-quark))))
+                       (apply callback args))
                   (when (signal-handler-is-connected-p gobject handler-id)
-                    (signal-handler-disconnect gobject handler-id))))))
-         handler-id))))
+                    (signal-handler-disconnect gobject handler-id)))))))
+       handler-id))))
 
 
 ;;;; Signal emission