5 :type cffi:foreign-pointer
11 :accessor g-object-has-reference
14 (defvar *foreign-gobjects* (make-weak-hash-table :test 'equal :weakness :value))
15 (defvar *foreign-gobjects-ref-count* (make-hash-table :test 'equal))
17 (defcstruct g-object-struct
18 (type-instance g-type-instance)
22 (defun ref-count (pointer)
23 (foreign-slot-value (if (pointerp pointer) pointer (pointer pointer)) 'g-object-struct 'ref-count))
25 (defmethod initialize-instance :after ((obj g-object) &key &allow-other-keys)
26 (unless (slot-boundp obj 'pointer)
27 (error "Pointer slot is not initialized for ~A" obj))
28 (let ((pointer (pointer obj)))
31 (g-object-dispose pointer))))
32 (register-g-object obj))
34 (defcallback weak-notify-print :void ((data :pointer) (object-pointer :pointer))
35 (debugf "g-object has disposed ~A ~A~%" (g-type-name (g-type-from-object object-pointer)) object-pointer))
37 (defun register-g-object (obj)
38 (debugf "registered GObject ~A with ref-count ~A~%" (pointer obj) (ref-count obj))
39 (when (or t ;; Do not understand
40 (not (g-object-has-reference obj))
41 (g-object-is-floating (pointer obj)))
42 (debugf "g_object_ref_sink(~A)~%" (pointer obj))
43 (g-object-ref-sink (pointer obj)))
44 (g-object-weak-ref (pointer obj) (callback weak-notify-print) (null-pointer))
45 (setf (g-object-has-reference obj) t)
46 (setf (gethash (pointer-address (pointer obj)) *foreign-gobjects*)
48 (setf (gethash (pointer-address (pointer obj)) *foreign-gobjects-ref-count*) 1))
50 (defun g-object-dispose (pointer)
51 (debugf "g_object_unref(~A) (of type ~A, lisp-value ~A) (lisp ref-count ~A, gobject ref-count ~A)~%"
53 (g-type-name (g-type-from-object pointer))
54 (gethash (pointer-address pointer) *foreign-gobjects*)
55 (gethash (pointer-address pointer) *foreign-gobjects-ref-count*)
57 (awhen (gethash (pointer-address pointer) *foreign-gobjects*)
58 (setf (pointer it) nil)
59 (cancel-finalization it))
60 (remhash (pointer-address pointer) *foreign-gobjects*)
61 (remhash (pointer-address pointer) *foreign-gobjects-ref-count*)
62 (g-object-unref pointer))
64 (defmethod release ((object g-object))
65 (debugf "Releasing object ~A (type ~A, lisp-value ~A)~%" (pointer object) (when (pointer object) (g-type-name (g-type-from-object (pointer object)))) object)
66 (unless (and (pointer object) (gethash (pointer-address (pointer object)) *foreign-gobjects-ref-count*))
67 (error "Object ~A already disposed of from lisp side" object))
68 (decf (gethash (pointer-address (pointer object)) *foreign-gobjects-ref-count*))
69 (when (zerop (gethash (pointer-address (pointer object)) *foreign-gobjects-ref-count*))
70 (g-object-dispose (pointer object))))
72 (defvar *registered-object-types* (make-hash-table :test 'equal))
73 (defun register-object-type (name type)
74 (setf (gethash name *registered-object-types*) type))
75 (defun get-g-object-lisp-type (g-type)
77 while (not (zerop g-type))
78 for lisp-type = (gethash (g-type-name g-type) *registered-object-types*)
79 when lisp-type do (return lisp-type)
80 do (setf g-type (g-type-parent g-type))))
82 (defun make-g-object-from-pointer (pointer)
83 (let* ((g-type (g-type-from-instance pointer))
84 (lisp-type (get-g-object-lisp-type g-type)))
86 (error "Type ~A is not registered with REGISTER-OBJECT-TYPE"
87 (g-type-name g-type)))
88 (make-instance lisp-type :pointer pointer)))
90 (define-foreign-type foreign-g-object-type ()
91 ((sub-type :reader sub-type :initarg :sub-type :initform 'g-object))
92 (:actual-type :pointer))
94 (define-parse-method g-object (&optional (sub-type 'g-object))
95 (make-instance 'foreign-g-object-type :sub-type sub-type))
97 (defmethod translate-to-foreign (object (type foreign-g-object-type))
99 ((null (pointer object))
100 (error "Object ~A has been disposed" object))
101 ((typep object 'g-object)
102 (assert (typep object (sub-type type))
104 "Object ~A is not a subtype of ~A" object (sub-type type))
106 ((pointerp object) object)
107 (t (error "Object ~A is not translatable as GObject*" object))))
109 (defun get-g-object-for-pointer (pointer)
110 (unless (null-pointer-p pointer)
111 (aif (gethash (pointer-address pointer) *foreign-gobjects*)
113 (incf (gethash (pointer-address pointer) *foreign-gobjects-ref-count*))
114 (debugf "increfering object ~A~%" pointer))
115 (make-g-object-from-pointer pointer))))
117 (defmethod translate-from-foreign (pointer (type foreign-g-object-type))
118 (get-g-object-for-pointer pointer))
120 (register-object-type "GObject" 'g-object)
122 (defun ensure-g-type (type)
125 (string (or (g-type-from-name type)
126 (error "Type ~A is invalid" type)))))
128 (defun ensure-object-pointer (object)
129 (if (pointerp object)
132 (g-object (pointer object)))))
134 (defun g-object-type-property-type (object-type property-name
135 &key assert-readable assert-writable)
136 (let* ((object-class (g-type-class-ref object-type))
137 (param-spec (g-object-class-find-property object-class property-name)))
140 (when (null-pointer-p param-spec)
141 (error "Property ~A on type ~A is not found"
143 (g-type-name object-type)))
144 (when (and assert-readable
145 (not (member :readable
146 (foreign-slot-value param-spec
149 (error "Property ~A on type ~A is not readable"
151 (g-type-name object-type)))
152 (when (and assert-writable
153 (not (member :writable
154 (foreign-slot-value param-spec
157 (error "Property ~A on type ~A is not writable"
159 (g-type-name object-type)))
160 (foreign-slot-value param-spec 'g-param-spec 'value-type))
161 (g-type-class-unref object-class))))
163 (defun g-object-property-type (object property-name
164 &key assert-readable assert-writable)
165 (g-object-type-property-type (g-type-from-object (ensure-object-pointer object))
167 :assert-readable assert-readable
168 :assert-writable assert-writable))
170 (defun g-object-call-constructor (object-type args-names args-values
171 &optional args-types)
172 (setf object-type (ensure-g-type object-type))
175 (mapcar (lambda (name)
176 (g-object-type-property-type object-type name))
178 (let ((args-count (length args-names)))
179 (with-foreign-object (parameters 'g-parameter args-count)
181 for i from 0 below args-count
182 for arg-name in args-names
183 for arg-value in args-values
184 for arg-type in args-types
185 for arg-g-type = (ensure-g-type arg-type)
186 for parameter = (mem-aref parameters 'g-parameter i)
187 do (setf (foreign-slot-value parameter 'g-parameter 'name) arg-name)
188 do (set-g-value (foreign-slot-value parameter 'g-parameter 'value)
192 (g-object-newv object-type args-count parameters)
194 for i from 0 below args-count
195 for parameter = (mem-aref parameters 'g-parameter i)
197 (mem-ref (foreign-slot-pointer parameter 'g-parameter 'name)
200 (foreign-slot-pointer parameter 'g-parameter 'value)))))))
202 (defun g-object-call-get-property (object property-name &optional property-type)
203 (unless property-type
205 (g-object-property-type object property-name :assert-readable t)))
206 (setf property-type (ensure-g-type property-type))
207 (with-foreign-object (value 'g-value)
209 (g-value-init value property-type)
210 (g-object-get-property (ensure-object-pointer object)
214 (g-value-unset value))))
216 (defun g-object-call-set-property (object property-name new-value
217 &optional property-type)
218 (unless property-type
220 (g-object-property-type object property-name :assert-writable t)))
221 (setf property-type (ensure-g-type property-type))
222 (with-foreign-object (value 'g-value)
223 (set-g-value value new-value property-type :zero-g-value t)
225 (g-object-set-property (ensure-object-pointer object)
227 (g-value-unset value))))