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macros.lisp
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(in-package #:cffi-object)
(defmacro with-new-cobject-class-definition ((name-form type-form) &body body)
(with-gensyms (name slots type)
`(let* ((,name ,name-form)
(,type (cffi::ensure-parsed-base-type ,type-form))
(,slots (cffi:foreign-slot-names ,type))
(predicate (symbolicate ,name '#:-p))
(equality-comparator (symbolicate ,name '#:-equal))
(constructor (symbolicate '#:make- ,name))
(internal-constructor (symbolicate '#:%%%make- ,name))
(in-place-constructor (symbolicate '#:%%make- ,name))
(copier (symbolicate '#:copy- ,name))
(slot-accessors (mapcar #'cons ,slots (mapcar (curry #'symbolicate ,name '#:-) ,slots)))
(cobject-class-definition `(make-cobject-class-definition :class ',name
:constructor ',constructor
:internal-constructor ',internal-constructor
:in-place-constructor ',in-place-constructor
:slot-accessors ',slot-accessors
:copier ',copier
:predicate ',predicate
:equality-comparator ',equality-comparator)))
(declare (ignorable cobject-class-definition))
. ,body)))
(defmacro with-parsed-desc ((name type) desc-form &body body)
(with-gensyms (desc parsed-type)
`(let ((,desc ,desc-form))
(destructuring-bind (,name &optional ,type) (if (and (listp ,desc) (not (keywordp (car ,desc))))
,desc (list ,desc))
(let* ((,parsed-type (or ,type ,name))
(,parsed-type (typecase ,type
(cffi::foreign-type ,parsed-type)
(t (cffi::parse-type ,parsed-type)))))
(unless ,type
(setf ,name (cffi::name ,parsed-type)))
(setf ,type ,parsed-type)
(let ((*package* (symbol-package ,name)))
,@body))))))
(defmacro define-prototype-cobject-class (desc)
(with-parsed-desc (name type) desc
`(progn
,(with-new-cobject-class-definition (name type)
`(eval-when (:compile-toplevel :load-toplevel :execute)
(setf (assoc-value *cobject-class-definitions* ',type) ,cobject-class-definition)))
,(let ((base-type (cffi::ensure-parsed-base-type type)))
(unless (or (eq type base-type) (assoc-value *cobject-class-definitions* base-type))
(with-new-cobject-class-definition (name base-type)
`(eval-when (:compile-toplevel :load-toplevel :execute)
(setf (assoc-value *cobject-class-definitions* ',base-type) ,cobject-class-definition))))))))
(defmacro define-struct-cobject-class (desc &rest options)
(let ((options (reduce #'append options)))
(with-parsed-desc (name ctype) desc
(let* ((type (cffi::ensure-parsed-base-type ctype))
(slots (cffi:foreign-slot-names type))
(slot-supplied-p-list (mapcar (compose #'gensym #'symbol-name) slots)))
(with-new-cobject-class-definition (name ctype)
(when-let ((constructor-option (getf options :constructor)))
(setf (getf (cdr cobject-class-definition) :constructor) `',(setf constructor constructor-option)))
(with-gensyms (pointer instance value stream destination)
(let ((*cobject-class-definitions* (acons type (eval cobject-class-definition) *cobject-class-definitions*)))
`(progn
(declaim (inline ,internal-constructor))
(defstruct (,name
(:include cobject)
(:predicate ,predicate)
(:copier nil)
(:constructor ,internal-constructor)))
,@(loop :with slots := (cffi::slots type)
:for (slot-name . slot-accessor) :in slot-accessors
:for slot := (gethash slot-name slots)
:for slot-type := (cffi::ensure-parsed-base-type (cffi:foreign-slot-type type slot-name))
:for slot-pointer := `(cffi:foreign-slot-pointer (cobject-pointer ,instance) ',type ',slot-name)
:for slot-value := `(cffi:foreign-slot-value (cobject-pointer ,instance) ',type ',slot-name)
:nconc `((declaim (inline ,slot-accessor))
(defun ,slot-accessor (,instance)
,(flet ((access-simple-slot ()
(typecase slot-type
(cffi::foreign-struct-type
`(,(cobject-class-definition-internal-constructor
(find-cobject-class-definition slot-type))
:pointer ,slot-pointer
:shared-from ,instance))
(cffi::foreign-array-type
`(%make-carray
:pointer ,slot-pointer
:shared-from ,instance
:dimensions ',(cffi::dimensions slot-type)
:element-type ',(cobject-class-definition-class
(find-cobject-class-definition
(cffi::ensure-parsed-base-type
(cffi-element-type slot-type))))))
(cffi::foreign-pointer-type
`(%make-cpointer
:pointer ,slot-value
:element-type ',(cobject-class-definition-class
(find-cobject-class-definition
(cffi::ensure-parsed-base-type
(cffi-pointer-type slot-type))))))
(t slot-value))))
(etypecase slot
(cffi::aggregate-struct-slot
(case (cffi::slot-count slot)
(0 `(%make-cpointer
:pointer ,slot-pointer
:shared-from ,instance
:element-type ',(cobject-class-definition-class (find-cobject-class-definition slot-type))))
(1 (access-simple-slot))
(t `(%make-carray
:pointer ,slot-pointer
:shared-from ,instance
:dimensions '(,(cffi::slot-count slot))
:element-type ',(cobject-class-definition-class (find-cobject-class-definition slot-type))))))
(cffi::simple-struct-slot (access-simple-slot))))))
:nconc `((declaim (inline (setf ,slot-accessor)))
(defun (setf ,slot-accessor) (,value ,instance)
,(flet ((access-simple-slot ()
(typecase slot-type
(cffi::foreign-struct-type
`(memcpy ,slot-pointer (cobject-pointer ,value) (cffi:foreign-type-size ',slot-type)))
(cffi::foreign-array-type
`(creplace (,slot-accessor ,instance) ,value))
(cffi::foreign-pointer-type
`(setf ,slot-value (cobject-pointer ,value)))
(t `(setf ,slot-value ,value)))))
(etypecase slot
(cffi::aggregate-struct-slot
(case (cffi::slot-count slot)
(1 (access-simple-slot))
(t `(creplace (,slot-accessor ,instance) ,value))))
(cffi::simple-struct-slot
(access-simple-slot)))))))
(declaim (inline ,in-place-constructor))
(defun ,in-place-constructor (,pointer &key . ,(mapcar #'list slots (mapcar (constantly nil) slots) slot-supplied-p-list))
(let ((,instance (,internal-constructor :pointer ,pointer)))
(declare (ignorable ,instance) (dynamic-extent ,instance))
,@(loop :for slot :in slots
:for slot-type := (cffi::ensure-parsed-base-type (cffi:foreign-slot-type type slot))
:for slot-supplied-p :in slot-supplied-p-list
:if (typep slot-type '(or cffi::foreign-struct-type cffi::foreign-array-type cffi::foreign-pointer-type))
:collect `(when ,slot-supplied-p
(let ((,value (make-cobject :pointer ,slot)))
(declare (dynamic-extent ,value))
(setf (,(assoc-value slot-accessors slot) ,instance) ,value)))
:else
:collect `(when ,slot-supplied-p
(setf (,(assoc-value slot-accessors slot) ,instance) ,slot)))
,pointer))
(declaim (inline ,constructor))
(defun ,constructor (&key . ,(mapcar #'list slots (mapcar (constantly nil) slots) slot-supplied-p-list))
(let* ((,pointer (funcall (cobject-allocator-allocator *cobject-allocator*) ',type))
(,instance (,internal-constructor :pointer ,pointer)))
,@(loop :for slot :in slots
:for slot-type := (cffi::ensure-parsed-base-type (cffi:foreign-slot-type type slot))
:for slot-supplied-p :in slot-supplied-p-list
:collect `(when ,slot-supplied-p
(setf (,(assoc-value slot-accessors slot) ,instance) ,slot)))
(manage-cobject ,instance)))
(declaim (inline ,equality-comparator))
,(with-gensyms (instance1 instance2)
`(defun ,equality-comparator (,instance1 ,instance2)
(zerop (memcmp (cobject-pointer ,instance1)
(cobject-pointer ,instance2)
(cffi:foreign-type-size ',type)))))
(declaim (inline ,copier))
(defun ,copier (,instance &optional (,destination (manage-cobject (,internal-constructor :pointer (funcall (cobject-allocator-allocator *cobject-allocator*) ',type)))))
(check-type ,instance ,name)
(check-type ,destination ,name)
(memcpy (cobject-pointer ,destination) (cobject-pointer ,instance) (cffi:foreign-type-size ',type))
,destination)
,(with-gensyms (print-slots)
`(defmethod print-object ((,instance ,name) ,stream)
(flet ((,print-slots ()
,@(loop :for (slot . slot-accessor) :in slot-accessors
:collect `(format ,stream ," :~A ~S" ',slot (,slot-accessor ,instance)))))
(if *print-readably*
(progn
(format ,stream "#.(~S" ',constructor)
(,print-slots)
(format ,stream ")"))
(print-unreadable-object (,instance ,stream)
(format ,stream "~S" ',name)
(,print-slots)
(format ,stream ,(concatenate 'string " @0x~" (prin1-to-string (* 2 (cffi:foreign-type-size :size))) ",'0X")
(cffi:pointer-address (cobject-pointer ,instance))))))))
(eval-when (:compile-toplevel :load-toplevel :execute)
(setf (assoc-value *cobject-class-definitions* ',type) ,cobject-class-definition))))))))))
(defmacro define-type-cobject-class (desc)
(with-parsed-desc (name type) desc
(let ((base-type (cffi::ensure-parsed-base-type type)))
(with-new-cobject-class-definition (name type)
(if-let ((definition (find-cobject-class-definition base-type)))
`(progn
(setf (find-class ',name) (find-class ',(cobject-class-definition-class definition))
(fdefinition ',predicate) (fdefinition ',(cobject-class-definition-predicate definition))
(fdefinition ',equality-comparator) (fdefinition ',(cobject-class-definition-equality-comparator definition))
(fdefinition ',constructor) (fdefinition ',(cobject-class-definition-constructor definition))
(fdefinition ',internal-constructor) (fdefinition ',(cobject-class-definition-internal-constructor definition))
(fdefinition ',in-place-constructor) (fdefinition ',(cobject-class-definition-in-place-constructor definition))
(fdefinition ',copier) (fdefinition ',(cobject-class-definition-copier definition))
. ,(mapcan
(lambda (var val)
`((fdefinition ',(cdr var)) (fdefinition ',(cdr val))
(fdefinition '(setf ,(cdr var))) (fdefinition '(setf ,(cdr val)))))
slot-accessors (cobject-class-definition-slot-accessors definition)))
(eval-when (:compile-toplevel :load-toplevel :execute)
(setf (assoc-value *cobject-class-definitions* ',type) ,cobject-class-definition)))
(error "Definition for the base type of ~A is not found." type))))))
(defmacro define-package-cobject-classes (desc)
(unless (listp desc)
(setf desc (list desc)))
(destructuring-bind (target &optional source) desc
(unless source
(shiftf source target *package*))
(loop :with source-package := (find-package source) :and target-package := (find-package target)
:with definitions :and type-set := (make-hash-table)
:for (source-name . type-getter) :in (nconc (hash-table-alist cffi::*default-type-parsers*)
(hash-table-alist cffi::*struct-type-parsers*))
:when (eql (symbol-package source-name) source-package)
:do (symbol-macrolet ((name (intern (symbol-name (cffi::name type)) target-package)))
(labels ((push-definition (type)
(case (gethash type type-set)
(push
(format t "Note: Found circular type reference, generating forward declaration for ~A.~%" name)
(push `(define-prototype-cobject-class (,name ,type)) definitions))
((nil)
(setf (gethash type type-set) 'push)
(prog1 (typecase type
(cffi::foreign-type-alias
(push-definition (cffi::actual-type type))
(when (typep (cffi::actual-type type) 'cffi::foreign-struct-type)
(push `(define-type-cobject-class (,name ,type)) definitions)))
(cffi::foreign-pointer-type
(push-definition (cffi-pointer-type type)))
(cffi::foreign-struct-type
(mapc (compose #'push-definition #'cffi::parse-type #'cffi::slot-type)
(hash-table-values (cffi::slots type)))
(push `(define-struct-cobject-class (,name ,type)) definitions)))
(setf (gethash type type-set) t))))))
(ignore-some-conditions (warning) (push-definition (funcall type-getter)))))
:finally (return `(progn . ,(nreverse definitions))))))
(defmacro define-cobject-class (desc &rest options)
(if (and (or (keywordp desc) (and (symbolp desc) (not (symbol-package desc)))) (find-package desc))
`(define-package-cobject-classes ,desc . ,options)
`(define-struct-cobject-class ,desc . ,options)))