src/pcl/early-low.lisp

   1 ;;;; some code pulled out of CMU CL's low.lisp to solve build order problems,
   2 ;;;; and some other stuff that just plain needs to be done early
   3
   4 ;;;; This software is part of the SBCL system. See the README file for
   5 ;;;; more information.
   6
   7 ;;;; This software is derived from software originally released by Xerox
   8 ;;;; Corporation. Copyright and release statements follow. Later modifications
   9 ;;;; to the software are in the public domain and are provided with
  10 ;;;; absolutely no warranty. See the COPYING and CREDITS files for more
  11 ;;;; information.
  12
  13 ;;;; copyright information from original PCL sources:
  14 ;;;;
  15 ;;;; Copyright (c) 1985, 1986, 1987, 1988, 1989, 1990 Xerox Corporation.
  16 ;;;; All rights reserved.
  17 ;;;;
  18 ;;;; Use and copying of this software and preparation of derivative works based
  19 ;;;; upon this software are permitted. Any distribution of this software or
  20 ;;;; derivative works must comply with all applicable United States export
  21 ;;;; control laws.
  22 ;;;;
  23 ;;;; This software is made available AS IS, and Xerox Corporation makes no
  24 ;;;; warranty about the software, its performance or its conformity to any
  25 ;;;; specification.
  26
  27 (in-package "SB-PCL")
  28
  29 (/show "starting early-low.lisp")
  30 \f
  31 ;;; FIXME: The PCL package is internal and is used by code in potential
  32 ;;; bottlenecks. Access to it might be faster through #.(find-package "SB-PCL")
  33 ;;; than through *PCL-PACKAGE*. And since it's internal, no one should be
  34 ;;; doing things like deleting and recreating it in a running target Lisp.
  35 ;;; So perhaps we should replace it uses of *PCL-PACKAGE* with uses of
  36 ;;; (PCL-PACKAGE), and make PCL-PACKAGE a macro which expands into
  37 ;;; the SB-PCL package itself. Maybe we should even use this trick for
  38 ;;; COMMON-LISP and KEYWORD, too. (And the definition of PCL-PACKAGE etc.
  39 ;;; could be made less viciously brittle when SB-FLUID.)
  40 ;;; (Or perhaps just define a macro
  41 ;;;   (DEFMACRO PKG (NAME)
  42 ;;;     #-SB-FLUID (FIND-PACKAGE NAME)
  43 ;;;     #+SB-FLUID `(FIND-PACKAGE ,NAME))
  44 ;;; and use that to replace all three variables.)
  45 (defvar *pcl-package*                (find-package "SB-PCL"))
  46
  47 (declaim (inline defstruct-classoid-p))
  48 (defun defstruct-classoid-p (classoid)
  49   ;; It is non-obvious to me why STRUCTURE-CLASSOID-P doesn't
  50   ;; work instead of this. -- NS 2008-03-14
  51   (typep (layout-info (classoid-layout classoid)) 'defstruct-description))
  52
  53 ;;; This excludes structure types created with the :TYPE option to
  54 ;;; DEFSTRUCT. It also doesn't try to deal with types created by
  55 ;;; hairy DEFTYPEs, e.g.
  56 ;;;   (DEFTYPE CACHE-STRUCTURE (SIZE)
  57 ;;;     (IF (> SIZE 11) 'BIG-CS 'SMALL-CS)).
  58 ;;; KLUDGE: In fact, it doesn't seem to deal with DEFTYPEs at all. Perhaps
  59 ;;; it needs a more mnemonic name. -- WHN 19991204
  60 (defun structure-type-p (type)
  61   (and (symbolp type)
  62        (let ((classoid (find-classoid type nil)))
  63          (and classoid
  64               (not (condition-classoid-p classoid))
  65               (defstruct-classoid-p classoid)))))
  66
  67 ;;; Symbol contruction utilities
  68 (defun format-symbol (package format-string &rest format-arguments)
  69   (without-package-locks
  70    (intern (apply #'format nil format-string format-arguments) package)))
  71
  72 (defun make-class-symbol (class-name)
  73   (format-symbol *pcl-package* "*THE-CLASS-~A*" (symbol-name class-name)))
  74
  75 (defun make-wrapper-symbol (class-name)
  76   (format-symbol *pcl-package* "*THE-WRAPPER-~A*" (symbol-name class-name)))
  77
  78 (defun condition-type-p (type)
  79   (and (symbolp type)
  80        (condition-classoid-p (find-classoid type nil))))
  81 \f
  82 (declaim (special *the-class-t*
  83                   *the-class-vector* *the-class-symbol*
  84                   *the-class-string* *the-class-sequence*
  85                   *the-class-rational* *the-class-ratio*
  86                   *the-class-number* *the-class-null* *the-class-list*
  87                   *the-class-integer* *the-class-float* *the-class-cons*
  88                   *the-class-complex* *the-class-character*
  89                   *the-class-bit-vector* *the-class-array*
  90                   *the-class-stream* *the-class-file-stream*
  91                   *the-class-string-stream*
  92
  93                   *the-class-slot-object*
  94                   *the-class-structure-object*
  95                   *the-class-standard-object*
  96                   *the-class-funcallable-standard-object*
  97                   *the-class-class*
  98                   *the-class-generic-function*
  99                   *the-class-built-in-class*
 100                   *the-class-slot-class*
 101                   *the-class-condition-class*
 102                   *the-class-structure-class*
 103                   *the-class-std-class*
 104                   *the-class-standard-class*
 105                   *the-class-funcallable-standard-class*
 106                   *the-class-forward-referenced-class*
 107                   *the-class-method*
 108                   *the-class-standard-method*
 109                   *the-class-standard-reader-method*
 110                   *the-class-standard-writer-method*
 111                   *the-class-standard-boundp-method*
 112                   *the-class-global-reader-method*
 113                   *the-class-global-writer-method*
 114                   *the-class-global-boundp-method*
 115                   *the-class-standard-generic-function*
 116                   *the-class-standard-effective-slot-definition*
 117
 118                   *the-eslotd-standard-class-slots*
 119                   *the-eslotd-funcallable-standard-class-slots*))
 120
 121 (declaim (special *the-wrapper-of-t*
 122                   *the-wrapper-of-vector* *the-wrapper-of-symbol*
 123                   *the-wrapper-of-string* *the-wrapper-of-sequence*
 124                   *the-wrapper-of-rational* *the-wrapper-of-ratio*
 125                   *the-wrapper-of-number* *the-wrapper-of-null*
 126                   *the-wrapper-of-list* *the-wrapper-of-integer*
 127                   *the-wrapper-of-float* *the-wrapper-of-cons*
 128                   *the-wrapper-of-complex* *the-wrapper-of-character*
 129                   *the-wrapper-of-bit-vector* *the-wrapper-of-array*))
 130 \f
 131 (/show "finished with early-low.lisp")