src/pcl/fast-init.lisp

   1 ;;;; This file defines the optimized make-instance functions.
   2
   3 ;;;; This software is part of the SBCL system. See the README file for
   4 ;;;; more information.
   5
   6 ;;;; This software is derived from software originally released by Xerox
   7 ;;;; Corporation. Copyright and release statements follow. Later modifications
   8 ;;;; to the software are in the public domain and are provided with
   9 ;;;; absolutely no warranty. See the COPYING and CREDITS files for more
  10 ;;;; information.
  11
  12 ;;;; copyright information from original PCL sources:
  13 ;;;;
  14 ;;;; Copyright (c) 1985, 1986, 1987, 1988, 1989, 1990 Xerox Corporation.
  15 ;;;; All rights reserved.
  16 ;;;;
  17 ;;;; Use and copying of this software and preparation of derivative works based
  18 ;;;; upon this software are permitted. Any distribution of this software or
  19 ;;;; derivative works must comply with all applicable United States export
  20 ;;;; control laws.
  21 ;;;;
  22 ;;;; This software is made available AS IS, and Xerox Corporation makes no
  23 ;;;; warranty about the software, its performance or its conformity to any
  24 ;;;; specification.
  25
  26 (in-package "SB-PCL")
  27 \f
  28 (defvar *compile-make-instance-functions-p* nil)
  29
  30 (defun update-make-instance-function-table (&optional (class *the-class-t*))
  31   (when (symbolp class) (setq class (find-class class)))
  32     (when (eq class *the-class-t*) (setq class *the-class-slot-object*))
  33     (when (memq *the-class-slot-object* (class-precedence-list class))
  34       (map-all-classes #'reset-class-initialize-info class)))
  35
  36 (defun constant-symbol-p (form)
  37   (and (constantp form)
  38        (let ((object (eval form)))
  39          (and (symbolp object)
  40               (symbol-package object)))))
  41
  42 (defvar *make-instance-function-keys* nil)
  43
  44 (defun expand-make-instance-form (form)
  45   (let ((class (cadr form)) (initargs (cddr form))
  46         (keys nil) (allow-other-keys-p nil) key value)
  47     (when (and (constant-symbol-p class)
  48                (let ((initargs-tail initargs))
  49                  (loop (when (null initargs-tail) (return t))
  50                        (unless (constant-symbol-p (car initargs-tail))
  51                          (return nil))
  52                        (setq key (eval (pop initargs-tail)))
  53                        (setq value (pop initargs-tail))
  54                        (when (eq :allow-other-keys key)
  55                          (setq allow-other-keys-p value))
  56                        (push key keys))))
  57       (let* ((class (eval class))
  58              (keys (nreverse keys))
  59              (key (list class keys allow-other-keys-p))
  60              (sym (make-instance-function-symbol key)))
  61         (push key *make-instance-function-keys*)
  62         (when sym
  63           ;; (famous last words:
  64           ;;   1. Don't worry, I know what I'm doing.
  65           ;;   2. You and what army?
  66           ;;   3. If you were as smart as you think you are, you
  67           ;;      wouldn't be a cop.
  68           ;; This is case #1.:-) Even if SYM hasn't been defined yet,
  69           ;; it must be an implementation function, or we we wouldn't
  70           ;; have expanded into it. So declare SYM as defined, so that
  71           ;; even if it hasn't been defined yet, the user doesn't get
  72           ;; obscure warnings about undefined internal implementation
  73           ;; functions like HAIRY-MAKE-instance-name.
  74           (sb-kernel:become-defined-fun-name sym)
  75           `(,sym ',class (list ,@initargs)))))))
  76
  77 (defmacro expanding-make-instance-toplevel (&rest forms &environment env)
  78   (let* ((*make-instance-function-keys* nil)
  79          (form (macroexpand `(expanding-make-instance ,@forms) env)))
  80     `(progn
  81        ,@(when *make-instance-function-keys*
  82            `((get-make-instance-functions ',*make-instance-function-keys*)))
  83        ,form)))
  84
  85 (defmacro expanding-make-instance (&rest forms &environment env)
  86   `(progn
  87      ,@(mapcar (lambda (form)
  88                  (walk-form form env
  89                             (lambda (subform context env)
  90                               (declare (ignore env))
  91                               (or (and (eq context :eval)
  92                                        (consp subform)
  93                                        (eq (car subform) 'make-instance)
  94                                        (expand-make-instance-form subform))
  95                                   subform))))
  96                forms)))
  97
  98 (defun get-make-instance-functions (key-list)
  99   (dolist (key key-list)
 100     (let* ((cell (find-class-cell (car key)))
 101            (make-instance-function-keys
 102             (find-class-cell-make-instance-function-keys cell))
 103            (mif-key (cons (cadr key) (caddr key))))
 104       (unless (find mif-key make-instance-function-keys
 105                     :test #'equal)
 106         (push mif-key (find-class-cell-make-instance-function-keys cell))
 107         (let ((class (find-class-cell-class cell)))
 108           (when (and class (not (forward-referenced-class-p class)))
 109             (update-initialize-info-internal
 110              (initialize-info class (car mif-key) nil (cdr mif-key))
 111              'make-instance-function)))))))
 112
 113 (defun make-instance-function-symbol (key)
 114   (let* ((class (car key))
 115          (symbolp (symbolp class)))
 116     (when (or symbolp (classp class))
 117       (let* ((class-name (if (symbolp class) class (class-name class)))
 118              (keys (cadr key))
 119              (allow-other-keys-p (caddr key)))
 120         (when (and (or symbolp
 121                        (and (symbolp class-name)
 122                             (eq class (find-class class-name nil))))
 123                    (symbol-package class-name))
 124           (let ((*package* *pcl-package*)
 125                 (*print-length* nil)
 126                 (*print-level* nil)
 127                 (*print-circle* nil)
 128                 (*print-case* :upcase)
 129                 (*print-pretty* nil))
 130             (intern (format nil
 131                             "MAKE-INSTANCE ~A::~A ~S ~S"
 132                             (package-name (symbol-package class-name))
 133                             (symbol-name class-name)
 134                             keys
 135                             allow-other-keys-p))))))))
 136
 137 (defun make-instance-1 (class initargs)
 138   (apply #'make-instance class initargs))
 139
 140 (defmacro define-cached-reader (type name trap)
 141   (let ((reader-name (intern (format nil "~A-~A" type name)))
 142         (cached-name (intern (format nil "~A-CACHED-~A" type name))))
 143     `(defmacro ,reader-name (info)
 144        `(let ((value (,',cached-name ,info)))
 145           (if (eq value :unknown)
 146               (progn
 147                 (,',trap ,info ',',name)
 148                 (,',cached-name ,info))
 149               value)))))
 150
 151 (eval-when (:compile-toplevel :load-toplevel :execute)
 152 (defparameter *initialize-info-cached-slots*
 153   '(valid-p                             ; t or (:invalid key)
 154     ri-valid-p
 155     initargs-form-list
 156     new-keys
 157     default-initargs-function
 158     shared-initialize-t-fun
 159     shared-initialize-nil-fun
 160     constants
 161     combined-initialize-function ; allocate-instance + shared-initialize
 162     make-instance-function ; nil means use gf
 163     make-instance-function-symbol)))
 164
 165 (defmacro define-initialize-info ()
 166   (let ((cached-slot-names
 167          (mapcar (lambda (name)
 168                    (intern (format nil "CACHED-~A" name)))
 169                  *initialize-info-cached-slots*))
 170         (cached-names
 171          (mapcar (lambda (name)
 172                    (intern (format nil "~A-CACHED-~A"
 173                                    'initialize-info name)))
 174                  *initialize-info-cached-slots*)))
 175     `(progn
 176        (defstruct (initialize-info (:copier nil))
 177          key wrapper
 178          ,@(mapcar (lambda (name)
 179                      `(,name :unknown))
 180                    cached-slot-names))
 181        (defmacro reset-initialize-info-internal (info)
 182          `(progn
 183             ,@(mapcar (lambda (cname)
 184                         `(setf (,cname ,info) :unknown))
 185                       ',cached-names)))
 186        (defun initialize-info-bound-slots (info)
 187          (let ((slots nil))
 188            ,@(mapcar (lambda (name cached-name)
 189                        `(unless (eq :unknown (,cached-name info))
 190                           (push ',name slots)))
 191                      *initialize-info-cached-slots* cached-names)
 192            slots))
 193       ,@(mapcar (lambda (name)
 194                   `(define-cached-reader initialize-info ,name
 195                      update-initialize-info-internal))
 196                 *initialize-info-cached-slots*))))
 197
 198 (define-initialize-info)
 199
 200 (defvar *initialize-info-cache-class* nil)
 201 (defvar *initialize-info-cache-initargs* nil)
 202 (defvar *initialize-info-cache-info* nil)
 203
 204 (defvar *revert-initialize-info-p* nil)
 205
 206 (defun reset-initialize-info (info)
 207   (setf (initialize-info-wrapper info)
 208         (class-wrapper (car (initialize-info-key info))))
 209   (let ((slots-to-revert (if *revert-initialize-info-p*
 210                              (initialize-info-bound-slots info)
 211                              '(make-instance-function))))
 212     (reset-initialize-info-internal info)
 213     (dolist (slot slots-to-revert)
 214       (update-initialize-info-internal info slot))
 215     info))
 216
 217 (defun reset-class-initialize-info (class)
 218   (reset-class-initialize-info-1 (class-initialize-info class)))
 219
 220 (defun reset-class-initialize-info-1 (cell)
 221   (when (consp cell)
 222     (when (car cell)
 223       (reset-initialize-info (car cell)))
 224     (let ((alist (cdr cell)))
 225       (dolist (a alist)
 226         (reset-class-initialize-info-1 (cdr a))))))
 227
 228 (defun initialize-info (class
 229                         initargs
 230                         &optional
 231                         (plist-p t)
 232                         allow-other-keys-arg)
 233   (let ((info nil))
 234     (if (and (eq *initialize-info-cache-class* class)
 235              (eq *initialize-info-cache-initargs* initargs))
 236         (setq info *initialize-info-cache-info*)
 237         (let ((initargs-tail initargs)
 238               (cell (or (class-initialize-info class)
 239                         (setf (class-initialize-info class) (cons nil nil)))))
 240           (loop (when (null initargs-tail) (return nil))
 241                 (let ((keyword (pop initargs-tail))
 242                       (alist-cell cell))
 243                   (when plist-p
 244                     (if (eq keyword :allow-other-keys)
 245                         (setq allow-other-keys-arg (pop initargs-tail))
 246                         (pop initargs-tail)))
 247                   (loop (let ((alist (cdr alist-cell)))
 248                           (when (null alist)
 249                             (setq cell (cons nil nil))
 250                             (setf (cdr alist-cell) (list (cons keyword cell)))
 251                             (return nil))
 252                           (when (eql keyword (caar alist))
 253                             (setq cell (cdar alist))
 254                             (return nil))
 255                           (setq alist-cell alist)))))
 256           (setq info (or (car cell)
 257                          (setf (car cell) (make-initialize-info))))))
 258     (let ((wrapper (initialize-info-wrapper info)))
 259       (unless (eq wrapper (class-wrapper class))
 260         (unless wrapper
 261           (let* ((initargs-tail initargs)
 262                  (klist-cell (list nil))
 263                  (klist-tail klist-cell))
 264             (loop (when (null initargs-tail) (return nil))
 265                   (let ((key (pop initargs-tail)))
 266                     (setf (cdr klist-tail) (list key)))
 267                   (setf klist-tail (cdr klist-tail))
 268                   (when plist-p (pop initargs-tail)))
 269             (setf (initialize-info-key info)
 270                   (list class (cdr klist-cell) allow-other-keys-arg))))
 271         (reset-initialize-info info)))
 272     (setq *initialize-info-cache-class* class)
 273     (setq *initialize-info-cache-initargs* initargs)
 274     (setq *initialize-info-cache-info* info)
 275     info))
 276
 277 (defun update-initialize-info-internal (info name)
 278   (let* ((key (initialize-info-key info))
 279          (class (car key))
 280          (keys (cadr key))
 281          (allow-other-keys-arg (caddr key)))
 282     (ecase name
 283       ((initargs-form-list new-keys)
 284        (multiple-value-bind (initargs-form-list new-keys)
 285            (make-default-initargs-form-list class keys)
 286          (setf (initialize-info-cached-initargs-form-list info)
 287                initargs-form-list)
 288          (setf (initialize-info-cached-new-keys info) new-keys)))
 289       ((default-initargs-function)
 290        (let ((initargs-form-list (initialize-info-initargs-form-list info)))
 291          (setf (initialize-info-cached-default-initargs-function info)
 292                (initialize-instance-simple-fun
 293                 'default-initargs-function info
 294                 class initargs-form-list))))
 295       ((valid-p ri-valid-p)
 296        (flet ((compute-valid-p (methods)
 297                 (or (not (null allow-other-keys-arg))
 298                     (multiple-value-bind (legal allow-other-keys)
 299                         (check-initargs-values class methods)
 300                       (or (not (null allow-other-keys))
 301                           (dolist (key keys t)
 302                             (unless (member key legal)
 303                               (return (cons :invalid key)))))))))
 304          (let ((proto (class-prototype class)))
 305            (setf (initialize-info-cached-valid-p info)
 306                  (compute-valid-p
 307                   (list (list* 'allocate-instance class nil)
 308                         (list* 'initialize-instance proto nil)
 309                         (list* 'shared-initialize proto t nil))))
 310            (setf (initialize-info-cached-ri-valid-p info)
 311                  (compute-valid-p
 312                   (list (list* 'reinitialize-instance proto nil)
 313                         (list* 'shared-initialize proto nil nil)))))))
 314       ((shared-initialize-t-fun)
 315        (multiple-value-bind (initialize-form-list ignore)
 316            (make-shared-initialize-form-list class keys t nil)
 317          (declare (ignore ignore))
 318          (setf (initialize-info-cached-shared-initialize-t-fun info)
 319                (initialize-instance-simple-fun
 320                 'shared-initialize-t-fun info
 321                 class initialize-form-list))))
 322       ((shared-initialize-nil-fun)
 323        (multiple-value-bind (initialize-form-list ignore)
 324            (make-shared-initialize-form-list class keys nil nil)
 325          (declare (ignore ignore))
 326          (setf (initialize-info-cached-shared-initialize-nil-fun info)
 327                (initialize-instance-simple-fun
 328                 'shared-initialize-nil-fun info
 329                 class initialize-form-list))))
 330       ((constants combined-initialize-function)
 331        (let ((initargs-form-list (initialize-info-initargs-form-list info))
 332              (new-keys (initialize-info-new-keys info)))
 333          (multiple-value-bind (initialize-form-list constants)
 334              (make-shared-initialize-form-list class new-keys t t)
 335            (setf (initialize-info-cached-constants info) constants)
 336            (setf (initialize-info-cached-combined-initialize-function info)
 337                  (initialize-instance-simple-fun
 338                   'combined-initialize-function info
 339                   class (append initargs-form-list initialize-form-list))))))
 340       ((make-instance-function-symbol)
 341        (setf (initialize-info-cached-make-instance-function-symbol info)
 342              (make-instance-function-symbol key)))
 343       ((make-instance-function)
 344        (let* ((function (get-make-instance-function key))
 345               (symbol (initialize-info-make-instance-function-symbol info)))
 346          (setf (initialize-info-cached-make-instance-function info) function)
 347          (when symbol (setf (gdefinition symbol)
 348                             (or function #'make-instance-1)))))))
 349   info)
 350
 351 (defun get-make-instance-function (key)
 352   (let* ((class (car key))
 353          (keys (cadr key)))
 354     (unless (eq *boot-state* 'complete)
 355       (return-from get-make-instance-function nil))
 356     (when (symbolp class)
 357       (setq class (find-class class)))
 358     (when (classp class)
 359       (unless (class-finalized-p class) (finalize-inheritance class)))
 360     (let* ((initargs (mapcan (lambda (key) (list key nil)) keys))
 361            (class-and-initargs (list* class initargs))
 362            (make-instance (gdefinition 'make-instance))
 363            (make-instance-methods
 364             (compute-applicable-methods make-instance class-and-initargs))
 365            (std-mi-meth (find-standard-ii-method make-instance-methods 'class))
 366            (class+initargs (list class initargs))
 367            (default-initargs (gdefinition 'default-initargs))
 368            (default-initargs-methods
 369                (compute-applicable-methods default-initargs class+initargs))
 370            (proto (and (classp class) (class-prototype class)))
 371            (initialize-instance-methods
 372             (when proto
 373               (compute-applicable-methods (gdefinition 'initialize-instance)
 374                                           (list* proto initargs))))
 375            (shared-initialize-methods
 376             (when proto
 377               (compute-applicable-methods (gdefinition 'shared-initialize)
 378                                           (list* proto t initargs)))))
 379       (when (null make-instance-methods)
 380         (return-from get-make-instance-function
 381           (lambda (class initargs)
 382             (apply #'no-applicable-method make-instance class initargs))))
 383       (unless (and (null (cdr make-instance-methods))
 384                    (eq (car make-instance-methods) std-mi-meth)
 385                    (null (cdr default-initargs-methods))
 386                    (eq (car (method-specializers
 387                              (car default-initargs-methods)))
 388                        *the-class-slot-class*)
 389                    (flet ((check-meth (meth)
 390                             (let ((quals (method-qualifiers meth)))
 391                               (if (null quals)
 392                                   (eq (car (method-specializers meth))
 393                                       *the-class-slot-object*)
 394                                   (and (null (cdr quals))
 395                                        (or (eq (car quals) :before)
 396                                            (eq (car quals) :after)))))))
 397                      (and (every #'check-meth initialize-instance-methods)
 398                           (every #'check-meth shared-initialize-methods))))
 399         (return-from get-make-instance-function nil))
 400       (get-make-instance-function-internal
 401        class key (default-initargs class initargs)
 402        initialize-instance-methods shared-initialize-methods))))
 403
 404 (defun get-make-instance-function-internal (class key initargs
 405                                                   initialize-instance-methods
 406                                                   shared-initialize-methods)
 407   (let* ((keys (cadr key))
 408          (allow-other-keys-p (caddr key))
 409          (allocate-instance-methods
 410           (compute-applicable-methods (gdefinition 'allocate-instance)
 411                                       (list* class initargs))))
 412     (unless allow-other-keys-p
 413       (unless (check-initargs-1
 414                class initargs
 415                (append allocate-instance-methods
 416                        initialize-instance-methods
 417                        shared-initialize-methods)
 418                t nil)
 419         (return-from get-make-instance-function-internal nil)))
 420     (if (or (cdr allocate-instance-methods)
 421             (some #'complicated-instance-creation-method
 422                   initialize-instance-methods)
 423             (some #'complicated-instance-creation-method
 424                   shared-initialize-methods))
 425         (make-instance-function-complex
 426          key class keys
 427          initialize-instance-methods shared-initialize-methods)
 428         (make-instance-function-simple
 429          key class keys
 430          initialize-instance-methods shared-initialize-methods))))
 431
 432 (defun complicated-instance-creation-method (m)
 433   (let ((qual (method-qualifiers m)))
 434     (if qual
 435         (not (and (null (cdr qual)) (eq (car qual) :after)))
 436         (let ((specl (car (method-specializers m))))
 437           (or (not (classp specl))
 438               (not (eq 'slot-object (class-name specl))))))))
 439
 440 (defun find-standard-ii-method (methods class-names)
 441   (dolist (m methods)
 442     (when (null (method-qualifiers m))
 443       (let ((specl (car (method-specializers m))))
 444         (when (and (classp specl)
 445                    (if (listp class-names)
 446                        (member (class-name specl) class-names)
 447                        (eq (class-name specl) class-names)))
 448           (return m))))))
 449
 450 (defmacro call-initialize-function (initialize-function instance initargs)
 451   `(let ((.function. ,initialize-function))
 452      (if (and (consp .function.)
 453               (eq (car .function.) 'call-initialize-instance-simple))
 454          (initialize-instance-simple (cadr .function.) (caddr .function.)
 455                                      ,instance ,initargs)
 456          (funcall (the function .function.) ,instance ,initargs))))
 457
 458 (defun make-instance-function-simple (key class keys
 459                                           initialize-instance-methods
 460                                           shared-initialize-methods)
 461   (multiple-value-bind (initialize-function constants)
 462       (get-simple-initialization-function class keys (caddr key))
 463     (let* ((wrapper (class-wrapper class))
 464            (lwrapper (list wrapper))
 465            (allocate-function
 466             (cond ((structure-class-p class)
 467                    #'allocate-structure-instance)
 468                   ((standard-class-p class)
 469                    #'allocate-standard-instance)
 470                   ((funcallable-standard-class-p class)
 471                    #'allocate-funcallable-instance)
 472                   (t
 473                    (error "error in make-instance-function-simple"))))
 474            (std-si-meth (find-standard-ii-method shared-initialize-methods
 475                                                  'slot-object))
 476            (shared-initfns
 477             (nreverse (mapcar (lambda (method)
 478                                 (make-effective-method-function
 479                                  #'shared-initialize
 480                                  `(call-method ,method nil)
 481                                  nil lwrapper))
 482                               (remove std-si-meth shared-initialize-methods))))
 483            (std-ii-meth (find-standard-ii-method initialize-instance-methods
 484                                                  'slot-object))
 485            (initialize-initfns
 486             (nreverse (mapcar (lambda (method)
 487                                 (make-effective-method-function
 488                                  #'initialize-instance
 489                                  `(call-method ,method nil)
 490                                  nil lwrapper))
 491                               (remove std-ii-meth
 492                                       initialize-instance-methods)))))
 493       (lambda (class1 initargs)
 494         (if (not (eq wrapper (class-wrapper class)))
 495             (let* ((info (initialize-info (coerce-to-class class1) initargs))
 496                    (fn (initialize-info-make-instance-function info)))
 497               (declare (type function fn))
 498               (funcall fn class1 initargs))
 499             (let* ((instance (funcall allocate-function wrapper constants))
 500                    (initargs (call-initialize-function initialize-function
 501                                                        instance initargs)))
 502               (dolist (fn shared-initfns)
 503                 (invoke-effective-method-function fn t instance t initargs))
 504               (dolist (fn initialize-initfns)
 505                 (invoke-effective-method-function fn t instance initargs))
 506               instance))))))
 507
 508 (defun make-instance-function-complex (key class keys
 509                                            initialize-instance-methods
 510                                            shared-initialize-methods)
 511   (multiple-value-bind (initargs-function initialize-function)
 512       (get-complex-initialization-functions class keys (caddr key))
 513     (let* ((wrapper (class-wrapper class))
 514            (shared-initialize
 515             (get-secondary-dispatch-function
 516              #'shared-initialize shared-initialize-methods
 517              `((class-eq ,class) t t)
 518              `((,(find-standard-ii-method shared-initialize-methods
 519                                           'slot-object)
 520                 ,(lambda (instance init-type &rest initargs)
 521                    (declare (ignore init-type))
 522                    (call-initialize-function initialize-function
 523                                              instance initargs)
 524                    instance)))
 525              (list wrapper *the-wrapper-of-t* *the-wrapper-of-t*)))
 526            (initialize-instance
 527             (get-secondary-dispatch-function
 528              #'initialize-instance initialize-instance-methods
 529              `((class-eq ,class) t)
 530              `((,(find-standard-ii-method initialize-instance-methods
 531                                           'slot-object)
 532                 ,(lambda (instance &rest initargs)
 533                    (invoke-effective-method-function
 534                     shared-initialize t instance t initargs))))
 535              (list wrapper *the-wrapper-of-t*))))
 536       (lambda (class1 initargs)
 537         (if (not (eq wrapper (class-wrapper class)))
 538             (let* ((info (initialize-info (coerce-to-class class1) initargs))
 539                    (fn (initialize-info-make-instance-function info)))
 540               (declare (type function fn))
 541               (funcall fn class1 initargs))
 542             (let* ((initargs (call-initialize-function initargs-function
 543                                                        nil initargs))
 544                    (instance (apply #'allocate-instance class initargs)))
 545               (invoke-effective-method-function
 546                initialize-instance t instance initargs)
 547               instance))))))
 548
 549 (defun get-simple-initialization-function (class
 550                                            keys
 551                                            &optional allow-other-keys-arg)
 552   (let ((info (initialize-info class keys nil allow-other-keys-arg)))
 553     (values (initialize-info-combined-initialize-function info)
 554             (initialize-info-constants info))))
 555
 556 (defun get-complex-initialization-functions (class
 557                                              keys
 558                                              &optional
 559                                              allow-other-keys-arg
 560                                              separate-p)
 561   (let* ((info (initialize-info class keys nil allow-other-keys-arg))
 562          (default-initargs-function (initialize-info-default-initargs-function
 563                                      info)))
 564     (if separate-p
 565         (values default-initargs-function
 566                 (initialize-info-shared-initialize-t-fun info))
 567         (values default-initargs-function
 568                 (initialize-info-shared-initialize-t-fun
 569                  (initialize-info class (initialize-info-new-keys info)
 570                                   nil allow-other-keys-arg))))))
 571
 572 (defun add-forms (forms forms-list)
 573   (when forms
 574     (setq forms (copy-list forms))
 575     (if (null (car forms-list))
 576         (setf (car forms-list) forms)
 577         (setf (cddr forms-list) forms))
 578     (setf (cdr forms-list) (last forms)))
 579   (car forms-list))
 580
 581 (defun make-default-initargs-form-list (class keys &optional (separate-p t))
 582   (let ((initargs-form-list (cons nil nil))
 583         (default-initargs (class-default-initargs class))
 584         (nkeys keys)
 585         (slots-alist
 586          (mapcan (lambda (slot)
 587                    (mapcar (lambda (arg)
 588                              (cons arg slot))
 589                            (slot-definition-initargs slot)))
 590                  (class-slots class)))
 591         (nslots nil))
 592     (dolist (key nkeys)
 593       (pushnew (cdr (assoc key slots-alist)) nslots))
 594     (dolist (default default-initargs)
 595       (let* ((key (car default))
 596              (slot (cdr (assoc key slots-alist)))
 597              (function (cadr default)))
 598         (unless (member slot nslots)
 599           (add-forms `((funcall ,function) (push-initarg ,key))
 600                      initargs-form-list)
 601           (push key nkeys)
 602           (push slot nslots))))
 603     (when separate-p
 604       (add-forms `((update-initialize-info-cache
 605                     ,class ,(initialize-info class nkeys nil)))
 606                  initargs-form-list))
 607     (add-forms `((finish-pushing-initargs))
 608                initargs-form-list)
 609     (values (car initargs-form-list) nkeys)))
 610
 611 (defun make-shared-initialize-form-list (class keys si-slot-names simple-p)
 612   (let* ((initialize-form-list (cons nil nil))
 613          (type (cond ((structure-class-p class)
 614                       'structure)
 615                      ((standard-class-p class)
 616                       'standard)
 617                      ((funcallable-standard-class-p class)
 618                       'funcallable)
 619                      (t (error "error in make-shared-initialize-form-list"))))
 620          (wrapper (class-wrapper class))
 621          (constants (when simple-p
 622                       (make-list (wrapper-no-of-instance-slots wrapper)
 623                                  :initial-element +slot-unbound+)))
 624          (slots (class-slots class))
 625          (slot-names (mapcar #'slot-definition-name slots))
 626          (slots-key (mapcar (lambda (slot)
 627                               (let ((index most-positive-fixnum))
 628                                 (dolist (key (slot-definition-initargs slot))
 629                                   (let ((pos (position key keys)))
 630                                     (when pos (setq index (min index pos)))))
 631                                 (cons slot index)))
 632                             slots))
 633          (slots (stable-sort slots-key #'< :key #'cdr)))
 634     (let ((n-popped 0))
 635       (dolist (slot+index slots)
 636         (let* ((slot (car slot+index))
 637                (name (slot-definition-name slot))
 638                (npop (1+ (- (cdr slot+index) n-popped))))
 639           (unless (eql (cdr slot+index) most-positive-fixnum)
 640             (let* ((pv-offset (1+ (position name slot-names))))
 641               (add-forms `(,@(when (plusp npop)
 642                                `((pop-initargs ,(* 2 npop))))
 643                            (instance-set ,pv-offset ,slot))
 644                          initialize-form-list))
 645             (incf n-popped npop)))))
 646     (dolist (slot+index slots)
 647       (let* ((slot (car slot+index))
 648              (name (slot-definition-name slot)))
 649         (when (and (eql (cdr slot+index) most-positive-fixnum)
 650                    (or (eq si-slot-names t)
 651                        (member name si-slot-names)))
 652           (let* ((initform (slot-definition-initform slot))
 653                  (initfunction (slot-definition-initfunction slot))
 654                  (location (unless (eq type 'structure)
 655                              (slot-definition-location slot)))
 656                  (pv-offset (1+ (position name slot-names)))
 657                  (forms (cond ((null initfunction)
 658                                nil)
 659                               ((constantp initform)
 660                                (let ((value (funcall initfunction)))
 661                                  (if (and simple-p (integerp location))
 662                                      (progn (setf (nth location constants)
 663                                                   value)
 664                                             nil)
 665                                      `((const ,value)
 666                                        (instance-set ,pv-offset ,slot)))))
 667                               (t
 668                                `((funcall ,(slot-definition-initfunction slot))
 669                                  (instance-set ,pv-offset ,slot))))))
 670             (add-forms `(,@(unless (or simple-p (null forms))
 671                              `((skip-when-instance-boundp ,pv-offset ,slot
 672                                 ,(length forms))))
 673                          ,@forms)
 674                        initialize-form-list)))))
 675     (values (car initialize-form-list) constants)))
 676
 677 (defvar *class-pv-table-table* (make-hash-table :test 'eq))
 678
 679 (defun get-pv-cell-for-class (class)
 680   (let* ((slot-names (mapcar #'slot-definition-name (class-slots class)))
 681          (slot-name-lists (list (cons nil slot-names)))
 682          (pv-table (gethash class *class-pv-table-table*)))
 683     (unless (and pv-table
 684                  (equal slot-name-lists (pv-table-slot-name-lists pv-table)))
 685       (setq pv-table (intern-pv-table :slot-name-lists slot-name-lists))
 686       (setf (gethash class *class-pv-table-table*) pv-table))
 687     (pv-table-lookup pv-table (class-wrapper class))))
 688
 689 (defvar *initialize-instance-simple-alist* nil)
 690 (defvar *note-iis-entry-p* nil)
 691
 692 (defvar *compiled-initialize-instance-simple-funs*
 693   (make-hash-table :test 'equal))
 694
 695 (defun initialize-instance-simple-fun (use info class form-list)
 696   (let* ((pv-cell (get-pv-cell-for-class class))
 697          (key (initialize-info-key info))
 698          (sf-key (list* use (class-name (car key)) (cdr key))))
 699     (if (or *compile-make-instance-functions-p*
 700             (gethash sf-key *compiled-initialize-instance-simple-funs*))
 701         (multiple-value-bind (form args)
 702             (form-list-to-lisp pv-cell form-list)
 703           (let ((entry (assoc form *initialize-instance-simple-alist*
 704                               :test #'equal)))
 705             (setf (gethash sf-key
 706                            *compiled-initialize-instance-simple-funs*)
 707                   t)
 708             (if entry
 709                 (setf (cdddr entry) (union (list sf-key) (cdddr entry)
 710                                            :test #'equal))
 711                 (progn
 712                   (setq entry (list* form nil nil (list sf-key)))
 713                   (setq *initialize-instance-simple-alist*
 714                         (nconc *initialize-instance-simple-alist*
 715                                (list entry)))))
 716             (unless (or *note-iis-entry-p* (cadr entry))
 717               (setf (cadr entry) (compile nil (car entry))))
 718             (if (cadr entry)
 719                 (apply (the function (cadr entry)) args)
 720                 `(call-initialize-instance-simple ,pv-cell ,form-list))))
 721         #||
 722         (lambda (instance initargs)
 723           (initialize-instance-simple pv-cell form-list instance initargs))
 724         ||#
 725         `(call-initialize-instance-simple ,pv-cell ,form-list))))
 726
 727 (defun load-precompiled-iis-entry (form function system uses)
 728   (let ((entry (assoc form *initialize-instance-simple-alist*
 729                       :test #'equal)))
 730     (unless entry
 731       (setq entry (list* form nil nil nil))
 732       (setq *initialize-instance-simple-alist*
 733             (nconc *initialize-instance-simple-alist*
 734                    (list entry))))
 735     (setf (cadr entry) function)
 736     (setf (caddr entry) system)
 737     (dolist (use uses)
 738       (setf (gethash use *compiled-initialize-instance-simple-funs*) t))
 739     (setf (cdddr entry) (union uses (cdddr entry)
 740                                :test #'equal))))
 741
 742 (defmacro precompile-iis-functions (&optional system)
 743   `(progn
 744     ,@(let (collect)
 745         (dolist (iis-entry *initialize-instance-simple-alist*)
 746           (when (or (null (caddr iis-entry))
 747                     (eq (caddr iis-entry) system))
 748             (when system (setf (caddr iis-entry) system))
 749             (push `(load-precompiled-iis-entry
 750                     ',(car iis-entry)
 751                     #',(car iis-entry)
 752                     ',system
 753                     ',(cdddr iis-entry))
 754                   collect)))
 755         (nreverse collect))))
 756
 757 (defun compile-iis-functions (after-p)
 758   (let ((*compile-make-instance-functions-p* t)
 759         (*revert-initialize-info-p* t)
 760         (*note-iis-entry-p* (not after-p)))
 761     (declare (special *compile-make-instance-functions-p*))
 762     (when (eq *boot-state* 'complete)
 763       (update-make-instance-function-table))))
 764
 765 ;(const const)
 766 ;(funcall function)
 767 ;(push-initarg const)
 768 ;(pop-supplied count) ; a positive odd number
 769 ;(instance-set pv-offset slotd)
 770 ;(skip-when-instance-boundp pv-offset slotd n)
 771
 772 (defun initialize-instance-simple (pv-cell form-list instance initargs)
 773   (let ((pv (car pv-cell))
 774         (initargs-tail initargs)
 775         (slots (get-slots-or-nil instance))
 776         (class (class-of instance))
 777         value)
 778     (loop (when (null form-list) (return nil))
 779           (let ((form (pop form-list)))
 780             (ecase (car form)
 781               (push-initarg
 782                (push value initargs)
 783                (push (cadr form) initargs))
 784               (const
 785                (setq value (cadr form)))
 786               (funcall
 787                (setq value (funcall (the function (cadr form)))))
 788               (pop-initargs
 789                (setq initargs-tail (nthcdr (1- (cadr form)) initargs-tail))
 790                (setq value (pop initargs-tail)))
 791               (instance-set
 792                (instance-write-internal
 793                 pv slots (cadr form) value
 794                 (setf (slot-value-using-class class instance (caddr form))
 795                       value)))
 796               (skip-when-instance-boundp
 797                (when (instance-boundp-internal
 798                       pv slots (cadr form)
 799                       (slot-boundp-using-class class instance (caddr form)))
 800                  (dotimes-fixnum (i (cadddr form))
 801                    (pop form-list))))
 802               (update-initialize-info-cache
 803                (when (consp initargs)
 804                  (setq initargs (cons (car initargs) (cdr initargs))))
 805                (setq *initialize-info-cache-class* (cadr form))
 806                (setq *initialize-info-cache-initargs* initargs)
 807                (setq *initialize-info-cache-info* (caddr form)))
 808               (finish-pushing-initargs
 809                (setq initargs-tail initargs)))))
 810     initargs))
 811
 812 (defun add-to-cvector (cvector constant)
 813   (or (position constant cvector)
 814       (prog1 (fill-pointer cvector)
 815         (vector-push-extend constant cvector))))
 816
 817 (defvar *inline-iis-instance-locations-p* t)
 818
 819 (defun first-form-to-lisp (forms cvector pv)
 820   (flet ((const (constant)
 821            (cond ((or (numberp constant) (characterp constant))
 822                   constant)
 823                  ((and (symbolp constant) (symbol-package constant))
 824                   `',constant)
 825                  (t
 826                   `(svref cvector ,(add-to-cvector cvector constant))))))
 827     (let ((form (pop (car forms))))
 828       (ecase (car form)
 829         (push-initarg
 830          `((push value initargs)
 831            (push ,(const (cadr form)) initargs)))
 832         (const
 833          `((setq value ,(const (cadr form)))))
 834         (funcall
 835          `((setq value (funcall (the function ,(const (cadr form)))))))
 836         (pop-initargs
 837          `((setq initargs-tail (,@(let ((pop (1- (cadr form))))
 838                                     (case pop
 839                                       (1 `(cdr))
 840                                       (3 `(cdddr))
 841                                       (t `(nthcdr ,pop))))
 842                                 initargs-tail))
 843            (setq value (pop initargs-tail))))
 844         (instance-set
 845          (let* ((pv-offset (cadr form))
 846                 (location (pvref pv pv-offset))
 847                 (default `(setf (slot-value-using-class class instance
 848                                                         ,(const (caddr form)))
 849                                 value)))
 850            (if *inline-iis-instance-locations-p*
 851                (typecase location
 852                  (fixnum `((and slots
 853                                 (setf (clos-slots-ref slots ,(const location))
 854                                       value))))
 855                  (cons `((setf (cdr ,(const location)) value)))
 856                  (t `(,default)))
 857                `((instance-write-internal pv slots ,(const pv-offset) value
 858                   ,default
 859                   ,(typecase location
 860                      (fixnum :instance)
 861                      (cons :class)
 862                      (t :default)))))))
 863         (skip-when-instance-boundp
 864          (let* ((pv-offset (cadr form))
 865                 (location (pvref pv pv-offset))
 866                 (default `(slot-boundp-using-class class instance
 867                            ,(const (caddr form)))))
 868            `((unless ,(if *inline-iis-instance-locations-p*
 869                           (typecase location
 870                             (fixnum `(not (and slots
 871                                                (eq (clos-slots-ref
 872                                                     slots
 873                                                     ,(const location))
 874                                                    +slot-unbound+))))
 875                             (cons `(not (eq (cdr ,(const location))
 876                                             +slot-unbound+)))
 877                             (t default))
 878                           `(instance-boundp-internal
 879                             pv slots ,(const pv-offset)
 880                             ,default
 881                             ,(typecase (pvref pv pv-offset)
 882                                (fixnum :instance)
 883                                (cons :class)
 884                                (t :default))))
 885                ,@(let ((sforms (cons nil nil)))
 886                    (dotimes-fixnum (i (cadddr form) (car sforms))
 887                      (add-forms (first-form-to-lisp forms cvector pv)
 888                                 sforms)))))))
 889         (update-initialize-info-cache
 890          `((when (consp initargs)
 891              (setq initargs (cons (car initargs) (cdr initargs))))
 892            (setq *initialize-info-cache-class* ,(const (cadr form)))
 893            (setq *initialize-info-cache-initargs* initargs)
 894            (setq *initialize-info-cache-info* ,(const (caddr form)))))
 895         (finish-pushing-initargs
 896          `((setq initargs-tail initargs)))))))
 897
 898 (defmacro iis-body (&body forms)
 899   `(let ((initargs-tail initargs)
 900          (slots (get-slots-or-nil instance))
 901          (class (class-of instance))
 902          (pv (car pv-cell))
 903          value)
 904      initargs instance initargs-tail pv cvector slots class value
 905      ,@forms))
 906
 907 (defun form-list-to-lisp (pv-cell form-list)
 908   (let* ((forms (list form-list))
 909          (cvector (make-array (floor (length form-list) 2)
 910                               :fill-pointer 0 :adjustable t))
 911          (pv (car pv-cell))
 912          (body (let ((rforms (cons nil nil)))
 913                  (loop (when (null (car forms)) (return (car rforms)))
 914                        (add-forms (first-form-to-lisp forms cvector pv)
 915                                   rforms))))
 916          (cvector-type `(simple-vector ,(length cvector))))
 917     (values
 918      `(lambda (pv-cell cvector)
 919         (declare (type ,cvector-type cvector))
 920         (lambda (instance initargs)
 921           (declare #.*optimize-speed*)
 922           (iis-body ,@body)
 923           initargs))
 924      (list pv-cell (coerce cvector cvector-type)))))
 925 \f
 926 ;;; The effect of this is to cause almost all of the overhead of
 927 ;;; MAKE-INSTANCE to happen at load time (or maybe at precompile time,
 928 ;;; as explained in a previous message) rather than the first time
 929 ;;; that MAKE-INSTANCE is called with a given class-name and sequence
 930 ;;; of keywords.
 931
 932 ;;; This optimization applies only when the first argument and all the
 933 ;;; even numbered arguments are constants evaluating to interned
 934 ;;; symbols.
 935
 936 (declaim (ftype (function (t) symbol) get-make-instance-function-symbol))
 937
 938 (define-compiler-macro make-instance (&whole form &rest args)
 939   (declare (ignore args))
 940   (let* ((*make-instance-function-keys* nil)
 941          (expanded-form (expand-make-instance-form form)))
 942     (if expanded-form
 943         `(funcall (fdefinition
 944                    ;; The name is guaranteed to be fbound.
 945                    ;; Is there a way to declare this?
 946                    (load-time-value
 947                     (get-make-instance-function-symbol
 948                      ',(first *make-instance-function-keys*))))
 949                   ,@(cdr expanded-form))
 950         form)))
 951
 952 (defun get-make-instance-function-symbol (key)
 953   (get-make-instance-functions (list key))
 954   (make-instance-function-symbol key))