;; 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 1.2 2001-02-11 21:49:12 espen Exp $
+;; $Id: gcallback.lisp,v 1.14 2004-11-07 16:04:21 espen Exp $
(in-package "GLIB")
(use-prefix "g")
-;;;; Closures
+;;;; Callback mechanism
(deftype gclosure () 'pointer)
-(define-foreign lisp-callback-closure-new () gclosure
- (callback-id unsigned-int))
+(defbinding (callback-closure-new "clg_callback_closure_new") () gclosure
+ (callback-id unsigned-int)
+ (callback pointer)
+ (destroy-notify pointer))
+(defun register-callback-function (function)
+ (check-type function (or null symbol function))
+ (register-user-data function))
+
+(defcallback closure-callback-marshal (nil
+ (gclosure pointer)
+ (return-value gvalue)
+ (n-params unsigned-int)
+ (param-values pointer)
+ (invocation-hint pointer)
+ (callback-id unsigned-int))
+ (callback-trampoline callback-id n-params param-values return-value))
+
+(defcallback %destroy-user-data (nil (id unsigned-int))
+ (destroy-user-data id))
+
+(defun make-callback-closure (function)
+ (callback-closure-new
+ (register-callback-function function)
+ (callback closure-callback-marshal) (callback %destroy-user-data)))
+
+
+(defun callback-trampoline (callback-id n-params param-values return-value)
+ (let* ((return-type (unless (null-pointer-p return-value)
+ (gvalue-type return-value)))
+ (args (loop
+ for n from 0 below n-params
+ collect (gvalue-get (sap+ param-values (* n +gvalue-size+))))))
+ (let ((result (apply #'invoke-callback callback-id return-type args)))
+ (when return-type
+ (gvalue-set return-value result)))))
-;;;; Callback mechanism
+(defun invoke-callback (callback-id return-type &rest args)
+ (restart-case
+ (apply (find-user-data callback-id) args)
+ (continue nil :report "Return from callback function"
+ (when return-type
+ (format *query-io* "Enter return value of type ~S: " return-type)
+ (force-output *query-io*)
+ (eval (read *query-io*))))
+ (re-invoke nil :report "Re-invoke callback function"
+ (apply #'invoke-callback callback-id return-type args))))
-(defun register-callback-function (function)
- (check-type function (or null symbol function))
- (lisp-callback-closure-new (register-user-data function)))
-(defun callback-trampoline (callback-id params return-value)
- (let* ((return-type (unless (null-pointer-p return-value)
- (type-from-number (gvalue-type return-value))))
- (args nil)
- (callback-function (find-user-data callback-id)))
-
- (destructuring-bind (nparams . param-values) params
- (dotimes (n nparams)
- (push (gvalue-get (sap+ param-values (* n +gvalue-size+))) args)))
-
- (labels ((invoke-callback ()
- (restart-case
- (unwind-protect
- (let ((result (apply callback-function args)))
- (when return-type
- (gvalue-set return-value result))))
-
- (continue nil :report "Return from callback function"
- (when return-type
- (format
- *query-io*
- "Enter return value of type ~S: "
- return-type)
- (force-output *query-io*)
- (gvalue-set return-value (eval (read *query-io*)))))
- (re-invoke nil :report "Re-invoke callback function"
- (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
+(defcallback source-callback-marshal (nil (callback-id unsigned-int))
+ (callback-trampoline callback-id 0 nil (make-pointer 0)))
+(defbinding (timeout-add "g_timeout_add_full")
+ (function interval &optional (priority 0)) unsigned-int
+ (priority int)
+ (interval unsigned-int)
+ (*source-callback-marshal* pointer)
+ ((register-callback-function function) unsigned-long)
+ ((callback %destroy-user-data) pointer))
-;;;; Signals
+(defbinding (idle-add "g_idle_add_full")
+ (function &optional (priority 0)) unsigned-int
+ (priority int)
+ (*source-callback-marshal* pointer)
+ ((register-callback-function function) unsigned-long)
+ ((callback %destroy-user-data) pointer))
-(defun signal-name-to-string (name)
- (substitute #\_ #\- (string-downcase (string name))))
-(define-foreign signal-lookup (name itype) unsigned-int
+
+;;;; Signals
+
+(defbinding signal-lookup (name itype) unsigned-int
((signal-name-to-string name) string)
(itype type-number))
-(define-foreign signal-name () string
+(defbinding signal-name () string
(signal-id unsigned-int))
(defun ensure-signal-id (signal-id instance)
(string (signal-lookup signal-id (type-number-of instance)))
(symbol (signal-lookup signal-id (type-number-of instance)))))
-(define-foreign signal-stop-emission (instance signal-id) nil
+(defbinding signal-stop-emission (instance signal-id) nil
(instance ginstance)
((ensure-signal-id signal-id instance) unsigned-int))
-; (define-foreign ("g_signal_add_emission_hook_full" signal-add-emisson-hook)
+; (defbinding (signal-add-emisson-hook "g_signal_add_emission_hook_full")
; () unsigned-int
; (signal-id unsigned-int)
; (closure gclosure))
-; (define-foreign signal-remove-emisson-hook () nil
+; (defbinding signal-remove-emisson-hook () nil
; (signal-id unsigned-int)
; (hook-id unsigned-int))
-(define-foreign ("g_signal_has_handler_pending" signal-has-handler-pending-p)
+(defbinding (signal-has-handler-pending-p "g_signal_has_handler_pending")
(instance signal-id &key detail blocked) boolean
(instance ginstance)
((ensure-signal-id signal-id instance) unsigned-int)
((or detail 0) quark)
(blocked boolean))
-(define-foreign ("g_signal_connect_closure_by_id" signal-connect-closure)
+(defbinding (signal-connect-closure "g_signal_connect_closure_by_id")
(instance signal-id closure &key detail after) unsigned-int
(instance ginstance)
((ensure-signal-id signal-id instance) unsigned-int)
(closure gclosure)
(after boolean))
-(define-foreign signal-handler-block () nil
+(defbinding signal-handler-block () nil
(instance ginstance)
(handler unsigned-int))
-(define-foreign signal-handler-unblock () nil
+(defbinding signal-handler-unblock () nil
(instance ginstance)
(handler unsigned-int))
-(define-foreign signal-handler-disconnect () nil
+(defbinding signal-handler-disconnect () nil
(instance ginstance)
(handler unsigned-int))
-(defun signal-connect (instance signal function &key after object)
- (let ((callback
- (cond
- ((or (eq object t) (eq object instance)) function)
- ((not object)
- #'(lambda (&rest args) (apply function (cdr args))))
- (t
- #'(lambda (&rest args) (apply function object (rest args)))))))
-
- (signal-connect-closure
- instance signal (register-callback-function callback) :after after)))
+(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
+ ((or (eq object t) (eq object gobject)) function)
+ ((not object)
+ #'(lambda (&rest args) (apply function (cdr args))))
+ (t
+ #'(lambda (&rest args) (apply function object (rest args))))))))
+ (signal-connect-closure gobject signal callback-id :after after)))
-;;;; Idles and timeouts
+;;; Message logging
+
+;; TODO: define and signal conditions based on log-level
+;(defun log-handler (domain log-level message)
+(def-callback log-handler (c-call:void (domain c-call:c-string)
+ (log-level c-call:int)
+ (message c-call:c-string))
+ (error "~A: ~A" domain message))
+
+(setf (extern-alien "log_handler" system-area-pointer) (callback log-handler))
+
+
+;;;; Convenient macros
+
+(defmacro def-callback-marshal (name (return-type &rest args))
+ (let ((names (loop
+ for arg in args
+ collect (if (atom arg) (gensym) (first arg))))
+ (types (loop
+ for arg in args
+ collect (if (atom arg) arg (second arg)))))
+ `(defcallback ,name (,return-type ,@(mapcar #'list names types)
+ (callback-id unsigned-int))
+ (invoke-callback callback-id ',return-type ,@names))))
+
+(defmacro with-callback-function ((id function) &body body)
+ `(let ((,id (register-callback-function ,function)))
+ (unwind-protect
+ (progn ,@body)
+ (destroy-user-data ,id))))
+
-; (defun timeout-remove (tag)
-; (source-remove tag))
-
-; (defun idle-remove (tag)
-; (source-remove tag))
~mdw / clg / blobdiff