glib/gobject.boxed.lisp

   1 (in-package :gobject)
   2
   3 (define-foreign-type g-boxed-foreign-type ()
   4   ((info :initarg :info
   5          :accessor g-boxed-foreign-info
   6          :initform (error "info must be specified"))
   7    (return-p :initarg :return-p
   8              :accessor g-boxed-foreign-return-p
   9              :initform nil))
  10   (:actual-type :pointer))
  11
  12 (eval-when (:compile-toplevel :load-toplevel :execute)
  13   (defstruct g-boxed-info
  14     name
  15     g-type))
  16
  17 (eval-when (:compile-toplevel :load-toplevel :execute)
  18   (defun get-g-boxed-foreign-info (name)
  19     (get name 'g-boxed-foreign-info)))
  20
  21 (defvar *g-type-name->g-boxed-foreign-info* (make-hash-table :test 'equal))
  22
  23 (defun get-g-boxed-foreign-info-for-gtype (g-type-designator)
  24   (or (gethash (g-type-string g-type-designator) *g-type-name->g-boxed-foreign-info*)
  25       (error "Unknown GBoxed type '~A'" (g-type-string g-type-designator))))
  26
  27 (defgeneric make-foreign-type (info &key return-p))
  28
  29 (define-parse-method g-boxed-foreign (name &rest options)
  30   (let ((info (get-g-boxed-foreign-info name)))
  31     (assert info nil "Unknown foreign GBoxed type ~A" name)
  32     (make-foreign-type info :return-p (member :return options))))
  33
  34 (defgeneric boxed-copy-fn (type-info native)
  35   (:method (type-info native)
  36     (g-boxed-copy (g-boxed-info-g-type type-info) native)))
  37
  38 (defmethod boxed-copy-fn :before (type-info native)
  39   (format t "(boxed-copy-fn ~A ~A)~%" (g-boxed-info-name type-info) native))
  40
  41 (defgeneric boxed-free-fn (type-info native)
  42   (:method (type-info native)
  43     (g-boxed-free (g-boxed-info-g-type type-info) native)))
  44
  45 (defmethod boxed-free-fn :before (type-info native)
  46   (format t "(boxed-free-fn ~A ~A)~%" (g-boxed-info-name type-info) native))
  47
  48 (defmethod has-callback-cleanup ((type g-boxed-foreign-type))
  49   t)
  50
  51 (eval-when (:load-toplevel :compile-toplevel :execute)
  52   (defstruct (g-boxed-cstruct-wrapper-info (:include g-boxed-info))
  53     cstruct-description))
  54
  55 (defclass boxed-cstruct-foreign-type (g-boxed-foreign-type) ())
  56
  57 (defstruct cstruct-slot-description
  58   name
  59   type
  60   count
  61   initform
  62   inline-p)
  63
  64 (defstruct (cstruct-inline-slot-description (:include cstruct-slot-description))
  65   boxed-type-name)
  66
  67 (defmethod make-load-form ((object cstruct-slot-description) &optional environment)
  68   (make-load-form-saving-slots object :environment environment))
  69
  70 (defmethod make-load-form ((object cstruct-inline-slot-description) &optional environment)
  71   (make-load-form-saving-slots object :environment environment))
  72
  73 (defstruct cstruct-description
  74   name
  75   slots)
  76
  77 (defmethod make-load-form ((object cstruct-description) &optional environment)
  78   (make-load-form-saving-slots object :environment environment))
  79
  80 (defun parse-cstruct-slot (slot)
  81   (destructuring-bind (name type &key count initform inline) slot
  82     (if inline
  83         (make-cstruct-inline-slot-description :name name :type (generated-cunion-name type)
  84                                        :count count :initform initform :inline-p inline
  85                                        :boxed-type-name type)
  86         (make-cstruct-inline-slot-description :name name :type type
  87                                               :count count :initform initform :inline-p inline))))
  88
  89 (defun parse-cstruct-definition (name slots)
  90   (make-cstruct-description :name name
  91                             :slots (mapcar #'parse-cstruct-slot slots)))
  92
  93 (defmacro define-g-boxed-cstruct (name g-type-name &body slots)
  94   (let ((cstruct-description (parse-cstruct-definition name slots)))
  95     `(progn
  96        (defstruct ,name
  97          ,@(iter (for slot in (cstruct-description-slots cstruct-description))
  98                  (for name = (cstruct-slot-description-name slot))
  99                  (for initform = (cstruct-slot-description-initform slot))
 100                  (collect (list name initform))))
 101        (defcstruct ,(generated-cstruct-name name)
 102          ,@(iter (for slot in (cstruct-description-slots cstruct-description))
 103                  (for name = (cstruct-slot-description-name slot))
 104                  (for type = (cstruct-slot-description-type slot))
 105                  (for count = (cstruct-slot-description-count slot))
 106                  (collect `(,name ,type ,@(when count `(:count ,count))))))
 107        (defcunion ,(generated-cunion-name name)
 108          (,name ,(generated-cstruct-name name)))
 109        (eval-when (:compile-toplevel :load-toplevel :execute)
 110          (setf (get ',name 'g-boxed-foreign-info)
 111                (make-g-boxed-cstruct-wrapper-info :name ',name
 112                                                   :g-type ,g-type-name
 113                                                   :cstruct-description ,cstruct-description)
 114                (gethash ,g-type-name *g-type-name->g-boxed-foreign-info*)
 115                (get ',name 'g-boxed-foreign-info))))))
 116
 117 (defmethod make-foreign-type ((info g-boxed-cstruct-wrapper-info) &key return-p)
 118   (make-instance 'boxed-cstruct-foreign-type :info info :return-p return-p))
 119
 120 (defun memcpy (target source bytes)
 121   (iter (for i from 0 below bytes)
 122         (setf (mem-aref target :uchar i)
 123               (mem-aref source :uchar i))))
 124
 125 (defmethod boxed-copy-fn ((info g-boxed-cstruct-wrapper-info) native)
 126   (if (g-boxed-info-g-type info)
 127       (g-boxed-copy (g-boxed-info-g-type info) native)
 128       (let ((copy (foreign-alloc (generated-cstruct-name (g-boxed-info-name info)))))
 129         (memcpy copy native (foreign-type-size (generated-cstruct-name (g-boxed-info-name info))))
 130         copy)))
 131
 132 (defmethod boxed-free-fn ((info g-boxed-cstruct-wrapper-info) native)
 133   (if (g-boxed-info-g-type info)
 134       (g-boxed-free (g-boxed-info-g-type info) native)
 135       (foreign-free native)))
 136
 137 (defun copy-slots-to-native (proxy native cstruct-description)
 138   (iter (with cstruct-type = (generated-cstruct-name (cstruct-description-name cstruct-description)))
 139         (for slot in (cstruct-description-slots cstruct-description))
 140         (for slot-name = (cstruct-slot-description-name slot))
 141         (cond
 142           ((cstruct-slot-description-count slot)
 143            (iter (with ptr = (foreign-slot-pointer native cstruct-type slot-name))
 144                  (with array = (slot-value proxy slot-name))
 145                  (for i from 0 below (cstruct-slot-description-count slot))
 146                  (setf (mem-aref ptr (cstruct-slot-description-type slot) i)
 147                        (aref array i))))
 148           ((cstruct-slot-description-inline-p slot)
 149            (let ((info (get-g-boxed-foreign-info (cstruct-inline-slot-description-boxed-type-name slot))))
 150              (copy-slots-to-native (slot-value proxy slot-name)
 151                                    (foreign-slot-pointer native cstruct-type slot-name)
 152                                    (g-boxed-cstruct-wrapper-info-cstruct-description info))))
 153           (t
 154            (setf (foreign-slot-value native cstruct-type slot-name)
 155                  (slot-value proxy slot-name))))))
 156
 157 (defun copy-slots-to-proxy (proxy native cstruct-description)
 158   (iter (with cstruct-type = (generated-cstruct-name (cstruct-description-name cstruct-description)))
 159         (for slot in (cstruct-description-slots cstruct-description))
 160         (for slot-name = (cstruct-slot-description-name slot))
 161         (cond
 162           ((cstruct-slot-description-count slot)
 163            (setf (slot-value proxy slot-name) (make-array (list (cstruct-slot-description-count slot))))
 164            (iter (with ptr = (foreign-slot-pointer native cstruct-type slot-name))
 165                  (with array = (slot-value proxy slot-name))
 166                  (for i from 0 below (cstruct-slot-description-count slot))
 167                  (setf (aref array i)
 168                        (mem-aref ptr (cstruct-slot-description-type slot) i))))
 169           ((cstruct-slot-description-inline-p slot)
 170            (let ((info (get-g-boxed-foreign-info (cstruct-inline-slot-description-boxed-type-name slot))))
 171              (copy-slots-to-proxy (slot-value proxy slot-name)
 172                                   (foreign-slot-pointer native cstruct-type slot-name)
 173                                   (g-boxed-cstruct-wrapper-info-cstruct-description info))))
 174           (t (setf (slot-value proxy slot-name)
 175                    (foreign-slot-value native cstruct-type slot-name))))))
 176
 177 (defmethod translate-to-foreign (proxy (type boxed-cstruct-foreign-type))
 178   (if (null proxy)
 179       (null-pointer)
 180       (let* ((info (g-boxed-foreign-info type))
 181              (native-structure-type (generated-cstruct-name (g-boxed-info-name info))))
 182         (with-foreign-object (native-structure native-structure-type)
 183           (copy-slots-to-native proxy native-structure (g-boxed-cstruct-wrapper-info-cstruct-description info))
 184           (values (boxed-copy-fn info native-structure) proxy)))))
 185
 186 (defmethod free-translated-object (native-structure (type boxed-cstruct-foreign-type) proxy)
 187   (when proxy
 188     (let ((info (g-boxed-foreign-info type)))
 189       (copy-slots-to-proxy proxy native-structure (g-boxed-cstruct-wrapper-info-cstruct-description info))
 190       (boxed-free-fn info native-structure))))
 191
 192 (defmethod translate-from-foreign (native-structure (type boxed-cstruct-foreign-type))
 193   (unless (null-pointer-p native-structure)
 194     (let* ((info (g-boxed-foreign-info type))
 195            (proxy-structure-type (g-boxed-info-name info))
 196            (proxy (make-instance proxy-structure-type)))
 197       (copy-slots-to-proxy proxy native-structure (g-boxed-cstruct-wrapper-info-cstruct-description info))
 198       (when (g-boxed-foreign-return-p type)
 199         (boxed-free-fn info native-structure))
 200       proxy)))
 201
 202 (defmethod cleanup-translated-object-for-callback ((type boxed-cstruct-foreign-type) proxy native-structure)
 203   (when proxy
 204     (let ((info (g-boxed-foreign-info type)))
 205       (copy-slots-to-native proxy native-structure (g-boxed-cstruct-wrapper-info-cstruct-description info)))))
 206
 207 (eval-when (:compile-toplevel :load-toplevel :execute)
 208   (defstruct (g-boxed-opaque-wrapper-info (:include g-boxed-info))
 209     alloc free))
 210
 211 (define-foreign-type boxed-opaque-foreign-type (g-boxed-foreign-type) ())
 212
 213 (defclass g-boxed-opaque ()
 214   ((pointer :initarg :pointer
 215             :initform nil
 216             :accessor g-boxed-opaque-pointer)))
 217
 218 (defmethod make-foreign-type ((info g-boxed-opaque-wrapper-info) &key return-p)
 219   (make-instance 'boxed-opaque-foreign-type :info info :return-p return-p))
 220
 221 (defmethod translate-to-foreign (proxy (type boxed-opaque-foreign-type))
 222   (prog1 (g-boxed-opaque-pointer proxy)
 223     (when (g-boxed-foreign-return-p type)
 224       (tg:cancel-finalization proxy)
 225       (setf (g-boxed-opaque-pointer proxy) nil))))
 226
 227 (defmethod free-translated-object (native (type boxed-opaque-foreign-type) param)
 228   (declare (ignore native type param)))
 229
 230 (defun make-boxed-free-finalizer (type pointer)
 231   (lambda () (boxed-free-fn type pointer)))
 232
 233 (defmethod translate-from-foreign (native (foreign-type boxed-opaque-foreign-type))
 234   (let* ((type (g-boxed-foreign-info foreign-type))
 235          (proxy (make-instance (g-boxed-info-name type) :pointer native)))
 236     (tg:finalize proxy (make-boxed-free-finalizer type native))))
 237
 238 (defmethod cleanup-translated-object-for-callback ((type boxed-opaque-foreign-type) proxy native)
 239   (tg:cancel-finalization proxy)
 240   (setf (g-boxed-opaque-pointer proxy) nil))
 241
 242 (defmacro define-g-boxed-opaque (name g-type-name &key
 243                                  (alloc (error "Alloc must be specified")))
 244   (let ((native-copy (gensym "NATIVE-COPY-"))
 245         (instance (gensym "INSTANCE-"))
 246         (finalizer (gensym "FINALIZER-")))
 247     `(progn (defclass ,name (g-boxed-opaque) ())
 248             (defmethod initialize-instance :after ((,instance ,name) &key &allow-other-keys)
 249               (unless (g-boxed-opaque-pointer ,instance)
 250                 (let ((,native-copy ,alloc))
 251                   (flet ((,finalizer () (boxed-free-fn ,g-type-name ,native-copy)))
 252                     (setf (g-boxed-opaque-pointer ,instance) ,native-copy)
 253                     (finalize ,instance (make-boxed-free-finalizer (get ',name 'g-boxed-foreign-info) ,native-copy))))))
 254             (eval-when (:compile-toplevel :load-toplevel :execute)
 255               (setf (get ',name 'g-boxed-foreign-info)
 256                     (make-g-boxed-opaque-wrapper-info :name ',name
 257                                                       :g-type ,g-type-name)
 258                     (gethash ,g-type-name *g-type-name->g-boxed-foreign-info*)
 259                     (get ',name 'g-boxed-foreign-info))))))
 260
 261 (defstruct var-structure
 262   name
 263   parent
 264   slots
 265   discriminator-slot
 266   variants
 267   resulting-cstruct-description)
 268
 269 (defstruct var-structure-variant
 270   discriminating-values
 271   structure)
 272
 273 (defmethod make-load-form ((object var-structure) &optional env)
 274   (make-load-form-saving-slots object :environment env))
 275
 276 (defmethod make-load-form ((object var-structure-variant) &optional env)
 277   (make-load-form-saving-slots object :environment env))
 278
 279 (defun var-struct-all-slots (struct)
 280   (when struct
 281     (append (var-struct-all-slots (var-structure-parent struct))
 282             (var-structure-slots struct))))
 283
 284 (defun all-structures (structure)
 285   (append (iter (for variant in (var-structure-variants structure))
 286                 (appending (all-structures (var-structure-variant-structure variant))))
 287           (list structure)))
 288
 289 (defun parse-variant-structure-definition (name slots &optional parent)
 290   (iter (with result = (make-var-structure :name name
 291                                            :parent parent
 292                                            :slots nil
 293                                            :discriminator-slot nil
 294                                            :variants nil))
 295         (for slot in slots)
 296         (if (eq :variant (first slot))
 297             (progn
 298               (when (var-structure-discriminator-slot result)
 299                 (error "Structure has more than one discriminator slot"))
 300               (setf (var-structure-discriminator-slot result) (second slot)
 301                     (var-structure-variants result) (parse-variants result (nthcdr 2 slot))))
 302             (push (parse-cstruct-slot slot) (var-structure-slots result)))
 303         (finally (setf (var-structure-slots result)
 304                        (reverse (var-structure-slots result)))
 305                  (unless parent
 306                    (set-variant-result-structure result))
 307                  (return result))))
 308
 309 (defun set-variant-result-structure (var-structure)
 310   (setf (var-structure-resulting-cstruct-description var-structure)
 311         (make-cstruct-description
 312          :name
 313          (var-structure-name var-structure)
 314          :slots
 315          (append
 316           (when (var-structure-parent var-structure)
 317             (cstruct-description-slots (var-structure-resulting-cstruct-description (var-structure-parent var-structure))))
 318           (var-structure-slots var-structure))))
 319   (iter (for variant in (var-structure-variants var-structure))
 320         (for child-var-structure = (var-structure-variant-structure variant))
 321         (set-variant-result-structure child-var-structure)))
 322
 323 (defun ensure-list (thing)
 324   (if (listp thing)
 325       thing
 326       (list thing)))
 327
 328 (defun parse-variants (parent variants)
 329   (iter (for var-descr in variants)
 330         (for (options variant-name . slots) in variants)
 331         (for variant =
 332              (make-var-structure-variant
 333               :discriminating-values (ensure-list options)
 334               :structure (parse-variant-structure-definition variant-name slots parent)))
 335         (collect variant)))
 336
 337 (defpackage :gobject.boxed.generated-names)
 338
 339 (defun generated-cstruct-name (symbol)
 340   (or (get symbol 'generated-cstruct-name)
 341       (setf (get symbol 'generated-cstruct-name) (gentemp (format nil "CSTRUCT-~A" (symbol-name symbol)) (find-package :gobject.boxed.generated-names)))))
 342
 343 (defun generated-cunion-name (symbol)
 344   (or (get symbol 'generated-cunion-name)
 345       (setf (get symbol 'generated-cunion-name) (gentemp (format nil "CUNION-~A" (symbol-name symbol)) (find-package :gobject.boxed.generated-names)))))
 346
 347 (defun generate-cstruct-1 (struct)
 348   `(defcstruct ,(generated-cstruct-name (cstruct-description-name struct))
 349      ,@(iter (for slot in (cstruct-description-slots struct))
 350              (collect `(,(cstruct-slot-description-name slot) ,(cstruct-slot-description-type slot)
 351                          ,@(when (cstruct-slot-description-count slot)
 352                                  `(:count ,(cstruct-slot-description-count slot))))))))
 353
 354 (defun generate-c-structures (structure)
 355   (iter (for str in (all-structures structure))
 356         (for cstruct = (var-structure-resulting-cstruct-description str))
 357         (collect (generate-cstruct-1 cstruct))))
 358
 359 (defun generate-variant-union (struct)
 360   `(defcunion ,(generated-cunion-name (var-structure-name struct))
 361      ,@(iter (for str in (all-structures struct))
 362              (collect `(,(var-structure-name str)
 363                          ,(generated-cstruct-name (var-structure-name str)))))))
 364
 365 (defun generate-structure-1 (str)
 366   `(defstruct ,(if (var-structure-parent str)
 367                    `(,(var-structure-name str) (:include ,(var-structure-name (var-structure-parent str))
 368                                                          (,(var-structure-discriminator-slot (var-structure-parent str))
 369                                                            ,(first (var-structure-variant-discriminating-values
 370                                                                     (find str
 371                                                                           (var-structure-variants
 372                                                                            (var-structure-parent str))
 373                                                                           :key #'var-structure-variant-structure))))))
 374                    `,(var-structure-name str))
 375      ,@(iter (for slot in (var-structure-slots str))
 376              (collect `(,(cstruct-slot-description-name slot)
 377                          ,(cstruct-slot-description-initform slot))))))
 378
 379 (defun generate-structures (str)
 380   (iter (for variant in (reverse (all-structures str)))
 381         (collect (generate-structure-1 variant))))
 382
 383 (defun generate-native-type-decision-procedure-1 (str proxy-var)
 384   (if (null (var-structure-discriminator-slot str))
 385       `(values ',(var-structure-resulting-cstruct-description str))
 386       `(typecase ,proxy-var
 387          ,@(iter (for variant in (var-structure-variants str))
 388                  (for v-str = (var-structure-variant-structure variant))
 389                  (collect `(,(var-structure-name v-str)
 390                              ,(generate-native-type-decision-procedure-1 v-str proxy-var))))
 391          (,(var-structure-name str)
 392           (values ',(var-structure-resulting-cstruct-description str))))))
 393
 394 (defun generate-proxy-type-decision-procedure-1 (str native-var)
 395   (if (null (var-structure-discriminator-slot str))
 396       `(values ',(var-structure-name str)
 397                ',(var-structure-resulting-cstruct-description str))
 398       `(case (foreign-slot-value ,native-var
 399                                  ',(generated-cstruct-name (var-structure-name str))
 400                                  ',(var-structure-discriminator-slot str))
 401          ,@(iter (for variant in (var-structure-variants str))
 402                  (for v-str = (var-structure-variant-structure variant))
 403                  (collect `(,(var-structure-variant-discriminating-values variant)
 404                              ,(generate-proxy-type-decision-procedure-1
 405                                v-str
 406                                native-var))))
 407          (t (values ',(var-structure-name str)
 408                     ',(var-structure-resulting-cstruct-description str))))))
 409
 410 (defun generate-proxy-type-decision-procedure (str)
 411   (let ((native (gensym "NATIVE-")))
 412     `(lambda (,native)
 413        (declare (ignorable ,native))
 414        ,(generate-proxy-type-decision-procedure-1 str native))))
 415
 416 (defun generate-native-type-decision-procedure (str)
 417   (let ((proxy (gensym "PROXY-")))
 418     `(lambda (,proxy)
 419        (declare (ignorable ,proxy))
 420        ,(generate-native-type-decision-procedure-1 str proxy))))
 421
 422 (defun compile-proxy-type-decision-procedure (str)
 423   (compile nil (generate-proxy-type-decision-procedure str)))
 424
 425 (defun compile-native-type-decision-procedure (str)
 426   (compile nil (generate-native-type-decision-procedure str)))
 427
 428 (defstruct (g-boxed-variant-cstruct-info (:include g-boxed-info))
 429   root
 430   native-type-decision-procedure
 431   proxy-type-decision-procedure)
 432
 433 (defmethod make-load-form ((object g-boxed-variant-cstruct-info) &optional env)
 434   (make-load-form-saving-slots object :environment env))
 435
 436 (define-foreign-type boxed-variant-cstruct-foreign-type (g-boxed-foreign-type) ())
 437
 438 (defmethod make-foreign-type ((info g-boxed-variant-cstruct-info) &key return-p)
 439   (make-instance 'boxed-variant-cstruct-foreign-type :info info :return-p return-p))
 440
 441 (defmacro define-g-boxed-variant-cstruct (name g-type-name &body slots)
 442   (let* ((structure (parse-variant-structure-definition name slots)))
 443     `(progn ,@(generate-c-structures structure)
 444             ,(generate-variant-union structure)
 445             ,@(generate-structures structure)
 446             (eval-when (:compile-toplevel :load-toplevel :execute)
 447               (setf (get ',name 'g-boxed-foreign-info)
 448                     (make-g-boxed-variant-cstruct-info :name ',name
 449                                                        :g-type ,g-type-name
 450                                                        :root ,structure
 451                                                        :native-type-decision-procedure
 452                                                        ,(generate-native-type-decision-procedure structure)
 453                                                        :proxy-type-decision-procedure
 454                                                        ,(generate-proxy-type-decision-procedure structure))
 455                     (gethash ,g-type-name *g-type-name->g-boxed-foreign-info*)
 456                     (get ',name 'g-boxed-foreign-info))))))
 457
 458 (defun decide-native-type (info proxy)
 459   (funcall (g-boxed-variant-cstruct-info-native-type-decision-procedure info) proxy))
 460
 461 (defmethod boxed-copy-fn ((info g-boxed-variant-cstruct-info) native)
 462   (if (g-boxed-info-g-type info)
 463       (g-boxed-copy (g-boxed-info-g-type info) native)
 464       (let ((copy (foreign-alloc (generated-cunion-name (g-boxed-info-name info)))))
 465         (memcpy copy native (foreign-type-size (generated-cunion-name (g-boxed-info-name info))))
 466         copy)))
 467
 468 (defmethod boxed-free-fn ((info g-boxed-variant-cstruct-info) native)
 469   (if (g-boxed-info-g-type info)
 470       (g-boxed-free (g-boxed-info-g-type info) native)
 471       (foreign-free native)))
 472
 473 (defmethod translate-to-foreign (proxy (foreign-type boxed-variant-cstruct-foreign-type))
 474   (if (null proxy)
 475       (null-pointer)
 476       (let* ((type (g-boxed-foreign-info foreign-type))
 477              (cstruct-description (decide-native-type type proxy)))
 478         (with-foreign-object (native-structure (generated-cunion-name
 479                                                 (var-structure-name
 480                                                  (g-boxed-variant-cstruct-info-root type))))
 481           (copy-slots-to-native proxy native-structure cstruct-description)
 482           (values (boxed-copy-fn type native-structure) proxy)))))
 483
 484 (defun decide-proxy-type (info native-structure)
 485   (funcall (g-boxed-variant-cstruct-info-proxy-type-decision-procedure info) native-structure))
 486
 487 (defmethod free-translated-object (native (foreign-type boxed-variant-cstruct-foreign-type) proxy)
 488   (when proxy
 489     (let ((type (g-boxed-foreign-info foreign-type)))
 490       (multiple-value-bind (actual-struct cstruct-description) (decide-proxy-type type native)
 491         (unless (eq (type-of proxy) actual-struct)
 492           (restart-case
 493               (error "Expected type of boxed variant structure ~A and actual type ~A do not match"
 494                      (type-of proxy) actual-struct)
 495             (skip-parsing-values () (return-from free-translated-object))))
 496         (copy-slots-to-proxy proxy native cstruct-description)
 497         (boxed-free-fn type native)))))
 498
 499 (defmethod translate-from-foreign (native (foreign-type boxed-variant-cstruct-foreign-type))
 500   (unless (null-pointer-p native)
 501     (let ((type (g-boxed-foreign-info foreign-type)))
 502       (multiple-value-bind (actual-struct cstruct-description) (decide-proxy-type type native)
 503         (let ((proxy (make-instance actual-struct)))
 504           (copy-slots-to-proxy proxy native cstruct-description)
 505           (when (g-boxed-foreign-return-p foreign-type)
 506             (boxed-free-fn type native))
 507           proxy)))))
 508
 509 (defmethod cleanup-translated-object-for-callback ((foreign-type boxed-variant-cstruct-foreign-type) proxy native)
 510   (when proxy
 511     (let ((type (g-boxed-foreign-info foreign-type)))
 512       (let ((cstruct-description (decide-native-type type proxy)))
 513         (copy-slots-to-native proxy native cstruct-description)))))
 514
 515 (defgeneric boxed-parse-g-value (gvalue-ptr info))
 516
 517 (defgeneric boxed-set-g-value (gvalue-ptr info proxy))
 518
 519 (defmethod parse-g-value-for-type (gvalue-ptr (type-numeric (eql +g-type-boxed+)) parse-kind)
 520   (declare (ignore parse-kind))
 521   (if (g-type= (g-value-type gvalue-ptr) (g-strv-get-type))
 522       (convert-from-foreign (g-value-get-boxed gvalue-ptr) '(glib:gstrv :free-from-foreign nil))
 523       (let ((boxed-type (get-g-boxed-foreign-info-for-gtype type-numeric)))
 524         (boxed-parse-g-value gvalue-ptr boxed-type))))
 525
 526 (defmethod set-gvalue-for-type (gvalue-ptr (type-numeric (eql +g-type-boxed+)) value)
 527   (if (g-type= (g-value-type gvalue-ptr) (g-strv-get-type))
 528       (g-value-set-boxed gvalue-ptr (convert-to-foreign value '(glib:gstrv :free-from-foreign nil)))
 529       (let ((boxed-type (get-g-boxed-foreign-info-for-gtype type-numeric)))
 530         (boxed-set-g-value gvalue-ptr boxed-type value))))
 531
 532 (defmethod boxed-parse-g-value (gvalue-ptr (info g-boxed-cstruct-wrapper-info))
 533   (translate-from-foreign (g-value-get-boxed gvalue-ptr) (make-foreign-type info :return-p nil)))
 534
 535 (defmethod boxed-set-g-value (gvalue-ptr (info g-boxed-cstruct-wrapper-info) proxy)
 536   (g-value-take-boxed gvalue-ptr (translate-to-foreign proxy (make-foreign-type info :return-p nil))))
 537
 538 (defmethod boxed-parse-g-value (gvalue-ptr (info g-boxed-variant-cstruct-info))
 539   (translate-from-foreign (g-value-get-boxed gvalue-ptr) (make-foreign-type info :return-p nil)))
 540
 541 (defmethod boxed-set-g-value (gvalue-ptr (info g-boxed-variant-cstruct-info) proxy)
 542   (g-value-take-boxed gvalue-ptr (translate-to-foreign proxy (make-foreign-type info :return-p nil))))
 543
 544 (defmethod boxed-parse-g-value (gvalue-ptr (info g-boxed-opaque-wrapper-info))
 545   (translate-from-foreign (boxed-copy-fn info (g-value-get-boxed gvalue-ptr)) (make-foreign-type info :return-p nil)))
 546
 547 (defmethod boxed-set-g-value (gvalue-ptr (info g-boxed-opaque-wrapper-info) proxy)
 548   (g-value-set-boxed gvalue-ptr (translate-to-foreign proxy (make-foreign-type info :return-p nil))))