Build instructions updated

[clg] / glib / gcallback.lisp

diff --git a/glib/gcallback.lisp b/glib/gcallback.lisp
index b872c4a08c6244bc3fd82d51450e6c09ff2006b2..28acd48e00f426e1034208b58d94e56fab3069ab 100644 (file)
--- a/glib/gcallback.lisp
+++ b/glib/gcallback.lisp
@@ -15,7 +15,7 @@
 ;; License along with this library; if not, write to the Free Software
 ;; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
-;; $Id: gcallback.lisp,v 1.8 2002-03-24 15:43:16 espen Exp $
+;; $Id: gcallback.lisp,v 1.10 2004-10-30 19:26:02 espen Exp $
 
 (in-package "GLIB")
 
@@ -54,7 +54,7 @@ (defun callback-trampoline (callback-id params return-value)
                   (unwind-protect
                       (let ((result (apply callback-function (reverse args))))
                         (when return-type
-                          (gvalue-set (print return-value) result))))
+                          (gvalue-set return-value result))))
                
                 (continue nil :report "Return from callback function"
                  (when return-type
@@ -68,16 +68,6 @@ (defun callback-trampoline (callback-id params return-value)
                  (invoke-callback)))))
       (invoke-callback))))
 
-(defun after-gc-hook ()
-  (setf
-   (extern-alien "callback_trampoline" system-area-pointer)
-   (make-pointer (kernel:get-lisp-obj-address #'callback-trampoline))
-   (extern-alien "destroy_user_data" system-area-pointer)
-   (make-pointer (kernel:get-lisp-obj-address #'destroy-user-data))))
-
-(pushnew 'after-gc-hook ext:*after-gc-hooks*)
-(after-gc-hook)
-
 
 ;;;; Timeouts and idle functions
 
@@ -160,6 +150,11 @@ (defbinding signal-handler-disconnect () nil
 
 
 (defmethod signal-connect ((gobject gobject) signal function &key after object)
+"Connects a callback function to a signal for a particular object. If :OBJECT 
+ is T, the object connected to is passed as the first argument to the callback 
+ function, or if :OBJECT is any other non NIL value, it is passed as the first 
+ argument instead. If :AFTER is non NIL, the handler will be called after the 
+ default handler of the signal."
   (let ((callback-id
         (make-callback-closure
          (cond
@@ -169,3 +164,26 @@ (defmethod signal-connect ((gobject gobject) signal function &key after object)
           (t
            #'(lambda (&rest args) (apply function object (rest args))))))))
     (signal-connect-closure gobject signal callback-id :after after)))
+
+
+;;; Message logging
+
+;; TODO: define and signal conditions based on log-level
+(defun log-handler (domain log-level message)
+  (declare (ignore log-level))
+  (error "~A: ~A" domain message))
+
+
+;;;
+
+(defun after-gc-hook ()
+  (setf
+   (extern-alien "callback_trampoline" system-area-pointer)
+   (make-pointer (kernel:get-lisp-obj-address #'callback-trampoline))
+   (extern-alien "destroy_user_data" system-area-pointer)
+   (make-pointer (kernel:get-lisp-obj-address #'destroy-user-data))
+   (extern-alien "log_handler" system-area-pointer)
+   (make-pointer (kernel:get-lisp-obj-address #'log-handler))))
+
+(pushnew 'after-gc-hook ext:*after-gc-hooks*)
+(after-gc-hook)