--- /dev/null
+(in-package :gobject)
+
+(define-foreign-type g-boxed-foreign-type ()
+ ((info :initarg :info
+ :accessor g-boxed-foreign-info
+ :initform (error "info must be specified"))
+ (free-from-foreign :initarg :free-from-foreign
+ :initform nil
+ :accessor g-boxed-foreign-free-from-foreign)
+ (free-to-foreign :initarg :free-to-foreign
+ :initform nil
+ :accessor g-boxed-foreign-free-to-foreign)
+ (for-callback :initarg :for-callback
+ :initform nil
+ :accessor g-boxed-foreign-for-callback))
+ (:actual-type :pointer))
+
+(eval-when (:compile-toplevel :load-toplevel :execute)
+ (defstruct g-boxed-info
+ name
+ g-type))
+
+(eval-when (:compile-toplevel :load-toplevel :execute)
+ (defun get-g-boxed-foreign-info (name)
+ (get name 'g-boxed-foreign-info)))
+
+(define-parse-method g-boxed-foreign (name &key free-from-foreign free-to-foreign for-callback)
+ (let ((info (get-g-boxed-foreign-info name)))
+ (assert info nil "Unknown foreign GBoxed type ~A" name)
+ (make-instance 'g-boxed-foreign-type
+ :info info
+ :free-from-foreign free-from-foreign
+ :free-to-foreign free-to-foreign
+ :for-callback for-callback)))
+
+(eval-when (:load-toplevel :compile-toplevel :execute)
+ (defstruct (g-boxed-cstruct-wrapper-info (:include g-boxed-info))
+ cstruct
+ slots))
+
+(defmacro define-g-boxed-cstruct (name cstruct-name g-type-name &body slots)
+ `(progn
+ (defstruct ,name
+ ,@(iter (for (name type &key initarg) in slots)
+ (collect (list name initarg))))
+ (defcstruct ,cstruct-name
+ ,@(iter (for (name type &key initarg) in slots)
+ (collect `(,name ,type))))
+ (eval-when (:compile-toplevel :load-toplevel :execute)
+ (setf (get ',name 'g-boxed-foreign-info)
+ (make-g-boxed-cstruct-wrapper-info :name ',name
+ :g-type ,g-type-name
+ :cstruct ',cstruct-name
+ :slots ',(iter (for (name type &key initarg) in slots)
+ (collect name)))))))
+
+(defgeneric create-temporary-native (type proxy)
+ (:documentation "Creates a native structure (or passes a pointer to copy contained in PROXY)
+that contains the same data that the PROXY contains and returns a pointer to it.
+
+This call is always paired by call to FREE-TEMPORARY-NATIVE and calls may be nested."))
+
+(defgeneric free-temporary-native (type proxy native-ptr)
+ (:documentation "Frees the native structure that was previously created
+by CREATE-TEMPORARY-NATIVE for the same PROXY.
+
+Also reads data from native structure pointer to by NATIVE-PTR
+and sets the PROXY to contain the same data.
+
+This call is always paired by call to CREATE-TEMPORARY-NATIVE and calls may be nested."))
+
+(defgeneric create-proxy-for-native (type native-ptr)
+ (:documentation "Creates a proxy that is initialized by data contained in native
+structured pointed to by NATIVE-PTR.
+
+Created proxy should not be linked to NATIVE-PTR and should have
+indefinite lifetime (until garbage collector collects it). Specifically,
+if proxy need a pointer to native structure, it should make a copy of
+a structure.
+
+If proxy requires finalization, finalizers should be added."))
+
+(defgeneric create-reference-proxy (type native-ptr)
+ (:documentation "Creates a reference proxy for a native structure pointed to by NATIVE-PTR.
+
+Reference proxy's lifetime is bound to duration of a callback. When the
+callback returns the reference proxy is declared invalid and operations on it are errors.
+
+This call is always paired by call to FREE-REFERENCE-PROXY and calls will not nest."))
+
+(defgeneric free-reference-proxy (type proxy native-ptr)
+ (:documentation "Frees a reference proxy PROXY previously created by call to
+CREATE-REFERENCE-PROXY. This call should ensure that all changes on PROXY are
+reflected in native structure pointed to by NATIVE-PTR.
+
+After a call to FREE-REFERENCE-PROXY, PROXY is declared invalid and using it is an error,
+operations on it should signal erros.
+
+This call is always paired by call to CREATE-REFERENCE-PROXY."))
+
+(defmethod create-temporary-native ((type g-boxed-cstruct-wrapper-info) proxy)
+ (format t "create-temporary-native~%")
+ (let* ((native-structure-type (g-boxed-cstruct-wrapper-info-cstruct type))
+ (native-structure (foreign-alloc native-structure-type)))
+ (iter (for slot in (g-boxed-cstruct-wrapper-info-slots type))
+ (setf (foreign-slot-value native-structure native-structure-type slot)
+ (slot-value proxy slot)))
+ native-structure))
+
+(defmethod free-temporary-native ((type g-boxed-cstruct-wrapper-info) proxy native-structure)
+ (format t "free-temporary-native~%")
+ (let ((native-structure-type (g-boxed-cstruct-wrapper-info-cstruct type)))
+ (iter (for slot in (g-boxed-cstruct-wrapper-info-slots type))
+ (setf (slot-value proxy slot)
+ (foreign-slot-value native-structure native-structure-type slot))))
+ (foreign-free native-structure))
+
+(defmethod create-proxy-for-native ((type g-boxed-cstruct-wrapper-info) native-structure)
+ (format t "create-proxy-for-native~%")
+ (let* ((native-structure-type (g-boxed-cstruct-wrapper-info-cstruct type))
+ (proxy (make-instance (g-boxed-info-name type))))
+ (iter (for slot in (g-boxed-cstruct-wrapper-info-slots type))
+ (setf (slot-value proxy slot)
+ (foreign-slot-value native-structure native-structure-type slot)))
+ proxy))
+
+(defmethod create-reference-proxy ((type g-boxed-cstruct-wrapper-info) native-structure)
+ (format t "create-reference-proxy~%")
+ (create-proxy-for-native type native-structure))
+
+(defmethod free-reference-proxy ((type g-boxed-cstruct-wrapper-info) proxy native-structure)
+ (format t "free-reference-proxy~%")
+ (let ((native-structure-type (g-boxed-cstruct-wrapper-info-cstruct type)))
+ (iter (for slot in (g-boxed-cstruct-wrapper-info-slots type))
+ (setf (foreign-slot-value native-structure native-structure-type slot)
+ (slot-value proxy slot)))))
+
+(defmethod translate-to-foreign (proxy (type g-boxed-foreign-type))
+ (if proxy
+ (let* ((info (g-boxed-foreign-info type)))
+ (values (create-temporary-native info proxy) proxy))
+ (null-pointer)))
+
+(defmethod free-translated-object (native-structure (type g-boxed-foreign-type) proxy)
+ (when proxy
+ (free-temporary-native (g-boxed-foreign-info type) proxy native-structure)))
+
+(defmethod translate-from-foreign (native-structure (type g-boxed-foreign-type))
+ (unless (null-pointer-p native-structure)
+ (let* ((info (g-boxed-foreign-info type)))
+ (cond
+ ((g-boxed-foreign-for-callback type)
+ (create-reference-proxy info native-structure))
+ ((or (g-boxed-foreign-free-to-foreign type)
+ (g-boxed-foreign-free-from-foreign type))
+ (error "Feature not yet handled"))
+ (t (create-proxy-for-native info native-structure))))))
+
+(defmethod cleanup-translated-object-for-callback ((type g-boxed-foreign-type) proxy native-structure)
+ (unless (null-pointer-p native-structure)
+ (free-reference-proxy (g-boxed-foreign-info type) proxy native-structure)))
+
+(defmethod has-callback-cleanup ((type g-boxed-foreign-type))
+ t)
+
+(eval-when (:compile-toplevel :load-toplevel :execute)
+ (defstruct (g-boxed-opaque-wrapper-info (:include g-boxed-info))
+ alloc free))
+
+(defclass g-boxed-opaque ()
+ ((pointer :initarg :pointer
+ :initform nil
+ :accessor g-boxed-opaque-pointer)))
+
+(defmethod create-temporary-native ((type g-boxed-opaque-wrapper-info) proxy)
+ (declare (ignore type))
+ (g-boxed-opaque-pointer proxy))
+
+(defmethod free-temporary-native ((type g-boxed-opaque-wrapper-info) proxy native-structure)
+ (declare (ignore type proxy native-structure)))
+
+(defmethod create-reference-proxy ((type g-boxed-opaque-wrapper-info) native-structure)
+ (make-instance (g-boxed-info-g-type type) :pointer native-structure))
+
+(defmethod free-reference-proxy ((type g-boxed-opaque-wrapper-info) proxy native-structure)
+ (declare (ignore type native-structure))
+ (setf (g-boxed-opaque-pointer proxy) nil))
+
+(defmethod create-proxy-for-native ((type g-boxed-opaque-wrapper-info) native-structure)
+ (let* ((g-type (g-boxed-info-g-type type))
+ (native-copy (g-boxed-copy g-type native-structure)))
+ (flet ((finalizer () (g-boxed-free g-type native-copy)))
+ (let ((proxy (make-instance (g-boxed-opaque-wrapper-info-g-type type) :pointer native-copy)))
+ (tg:finalize proxy #'finalizer)
+ proxy))))
+
+(defmacro define-g-boxed-opaque (name g-type-name &key
+ (alloc (error "Alloc must be specified")))
+ (let ((native-copy (gensym "NATIVE-COPY-"))
+ (instance (gensym "INSTANCE-"))
+ (finalizer (gensym "FINALIZER-")))
+ `(progn (defclass ,name (g-boxed-opaque) ())
+ (defmethod initialize-instance :after ((,instance ,name) &key &allow-other-keys)
+ (unless (g-boxed-opaque-pointer ,instance)
+ (let ((,native-copy ,alloc))
+ (flet ((,finalizer () (g-boxed-free ,g-type-name ,native-copy)))
+ (setf (g-boxed-opaque-pointer ,instance) ,native-copy)
+ (finalize ,instance #',finalizer)))))
+ (eval-when (:compile-toplevel :load-toplevel :execute)
+ (setf (get ',name 'g-boxed-foreign-info)
+ (make-g-boxed-opaque-wrapper-info :name ',name
+ :g-type ,g-type-name))))))
+
+(defstruct var-structure
+ name
+ parent
+ slots
+ discriminator-slot
+ variants)
+
+(defstruct var-structure-variant
+ discriminating-values
+ structure)
+
+(defstruct var-structure-slot
+ name
+ type
+ initform
+ count)
+
+(defmethod make-load-form ((object var-structure) &optional env)
+ (make-load-form-saving-slots object :environment env))
+
+(defmethod make-load-form ((object var-structure-slot) &optional env)
+ (make-load-form-saving-slots object :environment env))
+
+(defmethod make-load-form ((object var-structure-variant) &optional env)
+ (make-load-form-saving-slots object :environment env))
+
+(defun var-struct-all-slots (struct)
+ (when struct
+ (append (var-struct-all-slots (var-structure-parent struct))
+ (var-structure-slots struct))))
+
+(defun all-structures (structure)
+ (append (iter (for variant in (var-structure-variants structure))
+ (appending (all-structures (var-structure-variant-structure variant))))
+ (list structure)))
+
+(defun parse-variant-structure-definition (name slots &optional parent)
+ (iter (with result = (make-var-structure :name name
+ :parent parent
+ :slots nil
+ :discriminator-slot nil
+ :variants nil))
+ (for slot in slots)
+ (if (eq :variant (first slot))
+ (progn
+ (when (var-structure-discriminator-slot result)
+ (error "Structure has more than one discriminator slot"))
+ (setf (var-structure-discriminator-slot result) (second slot)
+ (var-structure-variants result) (parse-variants result (nthcdr 2 slot))))
+ (push (parse-slot slot) (var-structure-slots result)))
+ (finally (setf (var-structure-slots result)
+ (reverse (var-structure-slots result)))
+ (return result))))
+
+(defun parse-slot (slot)
+ (destructuring-bind (name type &key count initform) slot
+ (make-var-structure-slot :name name :type type :count count :initform initform)))
+
+(defun parse-variants (parent variants)
+ (iter (for var-descr in variants)
+ (for (options variant-name . slots) in variants)
+ (for variant =
+ (make-var-structure-variant
+ :discriminating-values (ensure-list options)
+ :structure (parse-variant-structure-definition variant-name slots parent)))
+ (collect variant)))
+
+(defun generated-cstruct-name (symbol)
+ (or (get symbol 'generated-cstruct-name)
+ (setf (get symbol 'generated-cstruct-name) (gensym (format nil "GEN-~A-CSTRUCT-" (symbol-name symbol))))))
+
+(defun generated-cunion-name (symbol)
+ (or (get symbol 'generated-cunion-name)
+ (setf (get symbol 'generated-cunion-name) (gensym (format nil "GEN-~A-CSTRUCT-" (symbol-name symbol))))))
+
+(defun generate-cstruct-1 (struct)
+ `(defcstruct ,(generated-cstruct-name (var-structure-name struct))
+ ,@(iter (for slot in (var-struct-all-slots struct))
+ (collect `(,(var-structure-slot-name slot) ,(var-structure-slot-type slot)
+ ,@(when (var-structure-slot-count slot)
+ (list `(:count ,(var-structure-slot-count slot)))))))))
+
+(defun generate-c-structures (structure)
+ (iter (for str in (all-structures structure))
+ (collect (generate-cstruct-1 str))))
+
+(defun generate-union-1 (struct)
+ `(defcunion ,(generated-cunion-name (var-structure-name struct))
+ ,@(iter (for variant in (all-structures struct))
+ (unless (eq struct variant)
+ (collect `(,(var-structure-name variant)
+ ,(generated-cunion-name (var-structure-name variant))))))))
+
+(defun generate-unions (struct)
+ (iter (for str in (all-structures struct))
+ (collect (generate-union-1 str))))
+
+(defun generate-structure-1 (str)
+ `(defstruct ,(if (var-structure-parent str)
+ `(,(var-structure-name str) (:include ,(var-structure-name (var-structure-parent str))
+ (,(var-structure-discriminator-slot (var-structure-parent str))
+ ,(first (var-structure-variant-discriminating-values
+ (find str
+ (var-structure-variants
+ (var-structure-parent str))
+ :key #'var-structure-variant-structure))))))
+ `,(var-structure-name str))
+ ,@(iter (for slot in (var-structure-slots str))
+ (collect `(,(var-structure-slot-name slot)
+ ,(var-structure-slot-initform slot))))))
+
+(defun generate-structures (str)
+ (iter (for variant in (reverse (all-structures str)))
+ (collect (generate-structure-1 variant))))
+
+(defun generate-native-type-decision-procedure-1 (str proxy-var)
+ (if (null (var-structure-discriminator-slot str))
+ `(values ',(generated-cstruct-name (var-structure-name str))
+ ',(mapcar #'var-structure-slot-name (var-struct-all-slots str)))
+ `(typecase ,proxy-var
+ ,@(iter (for variant in (var-structure-variants str))
+ (for v-str = (var-structure-variant-structure variant))
+ (collect `(,(var-structure-name v-str)
+ ,(generate-native-type-decision-procedure-1 v-str proxy-var))))
+ (,(var-structure-name str)
+ (values ',(generated-cstruct-name (var-structure-name str))
+ ',(mapcar #'var-structure-slot-name (var-struct-all-slots str)))))))
+
+(defun generate-proxy-type-decision-procedure-1 (str native-var)
+ (if (null (var-structure-discriminator-slot str))
+ `(values ',(var-structure-name str)
+ ',(mapcar #'var-structure-slot-name (var-struct-all-slots str))
+ ',(generated-cstruct-name (var-structure-name str)))
+ `(case (foreign-slot-value ,native-var
+ ',(generated-cstruct-name (var-structure-name str))
+ ',(var-structure-discriminator-slot str))
+ ,@(iter (for variant in (var-structure-variants str))
+ (for v-str = (var-structure-variant-structure variant))
+ (collect `(,(var-structure-variant-discriminating-values variant)
+ ,(generate-proxy-type-decision-procedure-1
+ v-str
+ native-var))))
+ (t (values ',(var-structure-name str)
+ ',(mapcar #'var-structure-slot-name (var-struct-all-slots str))
+ ',(generated-cstruct-name (var-structure-name str)))))))
+
+(defun generate-proxy-type-decision-procedure (str)
+ (let ((native (gensym "NATIVE-")))
+ `(lambda (,native)
+ ,(generate-proxy-type-decision-procedure-1 str native))))
+
+(defun generate-native-type-decision-procedure (str)
+ (let ((proxy (gensym "PROXY-")))
+ `(lambda (,proxy)
+ ,(generate-native-type-decision-procedure-1 str proxy))))
+
+(defun compile-proxy-type-decision-procedure (str)
+ (compile nil (generate-proxy-type-decision-procedure str)))
+
+(defun compile-native-type-decision-procedure (str)
+ (compile nil (generate-native-type-decision-procedure str)))
+
+(defstruct (g-boxed-variant-cstruct-info (:include g-boxed-info))
+ root
+ native-type-decision-procedure
+ proxy-type-decision-procedure)
+
+(defmethod make-load-form ((object g-boxed-variant-cstruct-info) &optional env)
+ (make-load-form-saving-slots object :environment env))
+
+(defmacro define-boxed-variant-cstruct (name g-type-name &body slots)
+ (let* ((structure (parse-variant-structure-definition name slots)))
+ `(progn ,@(generate-c-structures structure)
+ ,@(generate-unions structure)
+ ,@(generate-structures structure)
+ (eval-when (:compile-toplevel :load-toplevel :execute)
+ (setf (get ',name 'g-boxed-foreign-info)
+ (make-g-boxed-variant-cstruct-info :name ',name
+ :g-type ,g-type-name
+ :root ,structure
+ :native-type-decision-procedure
+ ,(generate-native-type-decision-procedure structure)
+ :proxy-type-decision-procedure
+ ,(generate-proxy-type-decision-procedure structure)))))))
+
+(defun decide-native-type (info proxy)
+ (funcall (g-boxed-variant-cstruct-info-native-type-decision-procedure info) proxy))
+
+(defmethod create-temporary-native ((type g-boxed-variant-cstruct-info) proxy)
+ (multiple-value-bind (actual-cstruct slots) (decide-native-type type proxy)
+ (let ((native-structure (foreign-alloc
+ (generated-cstruct-name
+ (var-structure-name
+ (g-boxed-variant-cstruct-info-root type))))))
+ (iter (for slot in slots)
+ (setf (foreign-slot-value native-structure actual-cstruct slot)
+ (slot-value proxy slot)))
+ native-structure)))
+
+(defun decide-proxy-type (info native-structure)
+ (funcall (g-boxed-variant-cstruct-info-proxy-type-decision-procedure info) native-structure))
+
+(defmethod free-temporary-native ((type g-boxed-variant-cstruct-info) proxy native-ptr)
+ (multiple-value-bind (actual-struct slots actual-cstruct) (decide-proxy-type type native-ptr)
+ (unless (eq (type-of proxy) actual-struct)
+ (restart-case
+ (error "Expected type of boxed variant structure ~A and actual type ~A do not match"
+ (type-of proxy) actual-struct)
+ (skip-parsing-values () (return-from free-temporary-native))))
+ (iter (for slot in slots)
+ (setf (slot-value proxy slot)
+ (foreign-slot-value native-ptr actual-cstruct slot)))))
+
+(defmethod create-proxy-for-native ((type g-boxed-variant-cstruct-info) native-ptr)
+ (multiple-value-bind (actual-struct slots actual-cstruct) (decide-proxy-type type native-ptr)
+ (let ((proxy (make-instance actual-struct)))
+ (iter (for slot in slots)
+ (setf (slot-value proxy slot)
+ (foreign-slot-value native-ptr actual-cstruct slot)))
+ proxy)))
+
+(defmethod create-reference-proxy ((type g-boxed-variant-cstruct-info) native-ptr)
+ (create-proxy-for-native type native-ptr))
+
+(defmethod free-reference-proxy ((type g-boxed-variant-cstruct-info) proxy native-ptr)
+ (multiple-value-bind (actual-cstruct slots) (decide-native-type type proxy)
+ (iter (for slot in slots)
+ (setf (foreign-slot-value native-ptr actual-cstruct slot)
+ (slot-value proxy slot)))))
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