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 ;;; The PCL package is internal and is used by code in potential
  32 ;;; bottlenecks. And since it's internal, no one should be
  33 ;;; doing things like deleting and recreating it in a running target Lisp.
  34 (define-symbol-macro *pcl-package* (load-time-value (find-package "SB-PCL") t))
  35
  36 (declaim (inline defstruct-classoid-p))
  37 (defun defstruct-classoid-p (classoid)
  38   ;; It is non-obvious to me why STRUCTURE-CLASSOID-P doesn't
  39   ;; work instead of this. -- NS 2008-03-14
  40   (typep (layout-info (classoid-layout classoid)) 'defstruct-description))
  41
  42 ;;; This excludes structure types created with the :TYPE option to
  43 ;;; DEFSTRUCT. It also doesn't try to deal with types created by
  44 ;;; hairy DEFTYPEs, e.g.
  45 ;;;   (DEFTYPE CACHE-STRUCTURE (SIZE)
  46 ;;;     (IF (> SIZE 11) 'BIG-CS 'SMALL-CS)).
  47 ;;; KLUDGE: In fact, it doesn't seem to deal with DEFTYPEs at all. Perhaps
  48 ;;; it needs a more mnemonic name. -- WHN 19991204
  49 (defun structure-type-p (type)
  50   (and (symbolp type)
  51        (let ((classoid (find-classoid type nil)))
  52          (and classoid
  53               (not (condition-classoid-p classoid))
  54               (defstruct-classoid-p classoid)))))
  55
  56 ;;; Symbol contruction utilities
  57 (defun format-symbol (package format-string &rest format-arguments)
  58   (without-package-locks
  59    (intern (apply #'format nil format-string format-arguments) package)))
  60
  61 (defun make-class-symbol (class-name)
  62   (format-symbol *pcl-package* "*THE-CLASS-~A*" (symbol-name class-name)))
  63
  64 (defun make-wrapper-symbol (class-name)
  65   (format-symbol *pcl-package* "*THE-WRAPPER-~A*" (symbol-name class-name)))
  66
  67 (defun condition-type-p (type)
  68   (and (symbolp type)
  69        (condition-classoid-p (find-classoid type nil))))
  70 \f
  71 (declaim (special *the-class-t*
  72                   *the-class-vector* *the-class-symbol*
  73                   *the-class-string* *the-class-sequence*
  74                   *the-class-rational* *the-class-ratio*
  75                   *the-class-number* *the-class-null* *the-class-list*
  76                   *the-class-integer* *the-class-float* *the-class-cons*
  77                   *the-class-complex* *the-class-character*
  78                   *the-class-bit-vector* *the-class-array*
  79                   *the-class-stream* *the-class-file-stream*
  80                   *the-class-string-stream*
  81
  82                   *the-class-slot-object*
  83                   *the-class-structure-object*
  84                   *the-class-standard-object*
  85                   *the-class-funcallable-standard-object*
  86                   *the-class-class*
  87                   *the-class-generic-function*
  88                   *the-class-system-class*
  89                   *the-class-built-in-class*
  90                   *the-class-slot-class*
  91                   *the-class-condition-class*
  92                   *the-class-structure-class*
  93                   *the-class-std-class*
  94                   *the-class-standard-class*
  95                   *the-class-funcallable-standard-class*
  96                   *the-class-forward-referenced-class*
  97                   *the-class-method*
  98                   *the-class-standard-method*
  99                   *the-class-standard-reader-method*
 100                   *the-class-standard-writer-method*
 101                   *the-class-standard-boundp-method*
 102                   *the-class-global-reader-method*
 103                   *the-class-global-writer-method*
 104                   *the-class-global-boundp-method*
 105                   *the-class-standard-generic-function*
 106                   *the-class-standard-direct-slot-definition*
 107                   *the-class-standard-effective-slot-definition*
 108                   *the-class-standard-specializer*
 109
 110                   *the-eslotd-standard-class-slots*
 111                   *the-eslotd-funcallable-standard-class-slots*))
 112
 113 (declaim (special *the-wrapper-of-t*
 114                   *the-wrapper-of-vector* *the-wrapper-of-symbol*
 115                   *the-wrapper-of-string* *the-wrapper-of-sequence*
 116                   *the-wrapper-of-rational* *the-wrapper-of-ratio*
 117                   *the-wrapper-of-number* *the-wrapper-of-null*
 118                   *the-wrapper-of-list* *the-wrapper-of-integer*
 119                   *the-wrapper-of-float* *the-wrapper-of-cons*
 120                   *the-wrapper-of-complex* *the-wrapper-of-character*
 121                   *the-wrapper-of-bit-vector* *the-wrapper-of-array*))
 122 \f
 123 (/show "finished with early-low.lisp")