+
+;;; service function for structure constructors
+(defun %make-instance-with-layout (layout)
+ (let ((result (%make-instance (layout-length layout))))
+ (setf (%instance-layout result) layout)
+ result))
+\f
+;;;; target-only parts of the DEFSTRUCT top level code
+
+;;; A list of hooks designating functions of one argument, the
+;;; classoid, to be called when a defstruct is evaluated.
+(defvar *defstruct-hooks* nil)
+
+;;; Catch attempts to mess up definitions of symbols in the CL package.
+(defun protect-cl (symbol)
+ (/show0 "entering PROTECT-CL, SYMBOL=..")
+ (/hexstr symbol)
+ (when (and *cold-init-complete-p*
+ (eq (symbol-package symbol) *cl-package*))
+ (cerror "Go ahead and patch the system."
+ "attempting to modify a symbol in the COMMON-LISP package: ~S"
+ symbol))
+ (/show0 "leaving PROTECT-CL")
+ (values))
+
+;;; the part of %DEFSTRUCT which makes sense only on the target SBCL
+;;;
+;;; (The "static" in the name is because it needs to be done not only
+;;; in ordinary toplevel %DEFSTRUCT, but also in cold init as early as
+;;; possible, to simulate static linking of structure functions as
+;;; nearly as possible.)
+(defun %target-defstruct (dd layout)
+ (declare (type defstruct-description dd))
+ (declare (type layout layout))
+
+ (/show0 "entering %TARGET-DEFSTRUCT")
+
+ (remhash (dd-name dd) *typecheckfuns*)
+
+ ;; (Constructors aren't set up here, because constructors are
+ ;; varied enough (possibly parsing any specified argument list)
+ ;; that we can't reasonably implement them as closures, so we
+ ;; implement them with DEFUN instead.)
+
+ ;; Set FDEFINITIONs for slot accessors.
+ (dolist (dsd (dd-slots dd))
+ (/show0 "doing FDEFINITION for slot accessor")
+ (let ((accessor-name (dsd-accessor-name dsd)))
+ ;; We mustn't step on any inherited accessors
+ (unless (accessor-inherited-data accessor-name dd)
+ (/show0 "ACCESSOR-NAME=..")
+ (/hexstr accessor-name)
+ (protect-cl accessor-name)
+ (/hexstr "getting READER-FUN and WRITER-FUN")
+ (multiple-value-bind (reader-fun writer-fun)
+ (slot-accessor-funs dd dsd)
+ (declare (type function reader-fun writer-fun))
+ (/show0 "got READER-FUN and WRITER-FUN=..")
+ (/hexstr reader-fun)
+ (setf (symbol-function accessor-name) reader-fun)
+ (unless (dsd-read-only dsd)
+ (/show0 "setting FDEFINITION for WRITER-FUN=..")
+ (/hexstr writer-fun)
+ (setf (fdefinition `(setf ,accessor-name)) writer-fun))))))
+
+ ;; Set FDEFINITION for copier.
+ (when (dd-copier-name dd)
+ (/show0 "doing FDEFINITION for copier")
+ (protect-cl (dd-copier-name dd))
+ ;; We can't use COPY-STRUCTURE for other kinds of objects, notably
+ ;; funcallable structures, since it returns a STRUCTURE-OBJECT.
+ ;; (And funcallable instances don't need copiers anyway.)
+ (aver (eql (dd-type dd) 'structure))
+ (setf (symbol-function (dd-copier-name dd))
+ ;; FIXME: should use a closure which checks arg type before copying
+ #'copy-structure))
+
+ ;; Set FDEFINITION for predicate.
+ (when (dd-predicate-name dd)
+ (/show0 "doing FDEFINITION for predicate")
+ (protect-cl (dd-predicate-name dd))
+ (setf (symbol-function (dd-predicate-name dd))
+ (ecase (dd-type dd)
+ ;; structures with LAYOUTs
+ ((structure funcallable-structure)
+ (/show0 "with-LAYOUT case")
+ (lambda (object)
+ (locally ; <- to keep SAFETY 0 from affecting arg count checking
+ (declare (optimize (speed 3) (safety 0)))
+ (/noshow0 "in with-LAYOUT structure predicate closure, OBJECT,LAYOUT=..")
+ (/nohexstr object)
+ (/nohexstr layout)
+ (typep-to-layout object layout))))
+ ;; structures with no LAYOUT (i.e. :TYPE VECTOR or :TYPE LIST)
+ ;;
+ ;; FIXME: should handle the :NAMED T case in these cases
+ (vector
+ (/show0 ":TYPE VECTOR case")
+ #'vectorp)
+ (list
+ (/show0 ":TYPE LIST case")
+ #'listp))))
+
+ (when (dd-doc dd)
+ (setf (fdocumentation (dd-name dd) 'type)
+ (dd-doc dd)))
+
+ ;; the BOUNDP test here is to get past cold-init.
+ (when (boundp '*defstruct-hooks*)
+ (dolist (fun *defstruct-hooks*)
+ (funcall fun (find-classoid (dd-name dd)))))
+
+ (/show0 "leaving %TARGET-DEFSTRUCT")
+ (values))
+\f
+;;;; generating out-of-line slot accessor functions
+
+;;; FIXME: Ideally, the presence of the type checks in the functions
+;;; here would be conditional on the optimization policy at the point
+;;; of expansion of DEFSTRUCT. (For now we're just doing the simpler
+;;; thing, putting in the type checks unconditionally.)
+
+;;; Return (VALUES SLOT-READER-FUN SLOT-WRITER-FUN).
+(defun slot-accessor-funs (dd dsd)
+
+ #+sb-xc (/show0 "entering SLOT-ACCESSOR-FUNS")
+
+ ;; various code generators
+ ;;
+ ;; Note: They're only minimally parameterized, and cavalierly grab
+ ;; things like INSTANCE and DSD-INDEX from the namespace they're
+ ;; expanded in.
+ (macrolet (;; code shared between funcallable instance case and the
+ ;; ordinary STRUCTURE-OBJECT case: Handle native
+ ;; structures with LAYOUTs and (possibly) raw slots.
+ (%native-slot-accessor-funs (dd-ref-fun-name)
+ (let ((instance-type-check-form
+ '(%check-structure-type-from-layout instance layout)))
+ (/show "macroexpanding %NATIVE-SLOT-ACCESSOR-FUNS" dd-ref-fun-name instance-type-check-form)
+ `(let ((layout (dd-layout-or-lose dd))
+ (dsd-raw-type (dsd-raw-type dsd)))
+ #+sb-xc (/show0 "in %NATIVE-SLOT-ACCESSOR-FUNS macroexpanded code")
+ ;; Map over all the possible RAW-TYPEs, compiling
+ ;; a different closure function for each one, so
+ ;; that once the COND over RAW-TYPEs happens (at
+ ;; the time closure is allocated) there are no
+ ;; more decisions to be made and things execute
+ ;; reasonably efficiently.
+ (cond
+ ;; nonraw slot case
+ ((eql dsd-raw-type t)
+ #+sb-xc (/show0 "in nonraw slot case")
+ (%slotplace-accessor-funs
+ (,dd-ref-fun-name instance dsd-index)
+ ,instance-type-check-form))
+ ;; raw slot cases
+ ,@(mapcar (lambda (rtd)
+ (let ((raw-type (raw-slot-data-raw-type rtd))
+ (accessor-name
+ (raw-slot-data-accessor-name rtd))
+ (n-words (raw-slot-data-n-words rtd)))
+ `((equal dsd-raw-type ',raw-type)
+ #+sb-xc (/show0 "in raw slot case")
+ (let ((raw-index (dd-raw-index dd)))
+ (multiple-value-bind (scaled-dsd-index
+ misalignment)
+ (floor dsd-index ,n-words)
+ (aver (zerop misalignment))
+ (%slotplace-accessor-funs
+ (,accessor-name (,dd-ref-fun-name
+ instance
+ raw-index)
+ scaled-dsd-index)
+ ,instance-type-check-form))))))
+ *raw-slot-data-list*)
+ ;; oops
+ (t
+ (bug "unexpected DSD-RAW-TYPE ~S" dsd-raw-type))))))
+ ;; code shared between DEFSTRUCT :TYPE LIST and
+ ;; DEFSTRUCT :TYPE VECTOR cases: Handle the "typed
+ ;; structure" case, with no LAYOUTs and no raw slots.
+ (%colontyped-slot-accessor-funs () (error "stub"))
+ ;; the common structure of the raw-slot and not-raw-slot
+ ;; cases, defined in terms of the writable SLOTPLACE. All
+ ;; possible flavors of slot access should be able to pass
+ ;; through here.
+ (%slotplace-accessor-funs (slotplace instance-type-check-form)
+ (/show "macroexpanding %SLOTPLACE-ACCESSOR-FUNS" slotplace instance-type-check-form)
+ `(let ((typecheckfun (typespec-typecheckfun dsd-type)))
+ (values (if (dsd-safe-p dsd)
+ (lambda (instance)
+ (/noshow0 "in %SLOTPLACE-ACCESSOR-FUNS-defined reader")
+ ,instance-type-check-form
+ (/noshow0 "back from INSTANCE-TYPE-CHECK-FORM")
+ ,slotplace)
+ (lambda (instance)
+ (/noshow0 "in %SLOTPLACE-ACCESSOR-FUNS-defined reader")
+ ,instance-type-check-form
+ (/noshow0 "back from INSTANCE-TYPE-CHECK-FORM")
+ (let ((value ,slotplace))
+ (funcall typecheckfun value)
+ value)))
+ (lambda (new-value instance)
+ (/noshow0 "in %SLOTPLACE-ACCESSOR-FUNS-defined writer")
+ ,instance-type-check-form
+ (/noshow0 "back from INSTANCE-TYPE-CHECK-FORM")
+ (funcall typecheckfun new-value)
+ (/noshow0 "back from TYPECHECKFUN")
+ (setf ,slotplace new-value))))))
+
+ (let ((dsd-index (dsd-index dsd))
+ (dsd-type (dsd-type dsd)))
+
+ #+sb-xc (/show0 "got DSD-TYPE=..")
+ #+sb-xc (/hexstr dsd-type)
+ (ecase (dd-type dd)
+
+ ;; native structures
+ (structure
+ #+sb-xc (/show0 "case of DSD-TYPE = STRUCTURE")
+ (%native-slot-accessor-funs %instance-ref))
+
+ ;; structures with the :TYPE option
+
+ ;; FIXME: Worry about these later..
+ #|
+ ;; In :TYPE LIST and :TYPE VECTOR structures, ANSI specifies the
+ ;; layout completely, so that raw slots are impossible.
+ (list
+ (dd-type-slot-accessor-funs nth-but-with-sane-arg-order
+ `(%check-structure-type-from-dd
+ :maybe-raw-p nil))
+ (vector
+ (dd-type-slot-accessor-funs aref
+ :maybe-raw-p nil)))
+ |#
+ ))))