1 ;;;; machine-independent aspects of the object representation
3 ;;;; This software is part of the SBCL system. See the README file for
6 ;;;; This software is derived from the CMU CL system, which was
7 ;;;; written at Carnegie Mellon University and released into the
8 ;;;; public domain. The software is in the public domain and is
9 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
10 ;;;; files for more information.
14 ;;;; the primitive objects themselves
16 (define-primitive-object (cons :lowtag list-pointer-lowtag
18 (car :ref-trans car :set-trans sb!c::%rplaca :init :arg)
19 (cdr :ref-trans cdr :set-trans sb!c::%rplacd :init :arg))
21 (define-primitive-object (instance :lowtag instance-pointer-lowtag
22 :header instance-header-widetag
23 :alloc-trans %make-instance)
26 (define-primitive-object (bignum :lowtag other-pointer-lowtag
27 :header bignum-widetag
28 :alloc-trans sb!bignum::%allocate-bignum)
29 (digits :rest-p t :c-type #!-alpha "long" #!+alpha "u32"))
31 (define-primitive-object (ratio :type ratio
32 :lowtag other-pointer-lowtag
34 :alloc-trans %make-ratio)
35 (numerator :type integer
36 :ref-known (flushable movable)
39 (denominator :type integer
40 :ref-known (flushable movable)
41 :ref-trans %denominator
44 (define-primitive-object (single-float :lowtag other-pointer-lowtag
45 :header single-float-widetag)
46 (value :c-type "float"))
48 (define-primitive-object (double-float :lowtag other-pointer-lowtag
49 :header double-float-widetag)
51 (value :c-type "double" :length 2))
54 (define-primitive-object (long-float :lowtag other-pointer-lowtag
55 :header long-float-widetag)
57 (value :c-type "long double" :length #!+x86 3 #!+sparc 4))
59 (define-primitive-object (complex :type complex
60 :lowtag other-pointer-lowtag
61 :header complex-widetag
62 :alloc-trans %make-complex)
64 :ref-known (flushable movable)
68 :ref-known (flushable movable)
72 (define-primitive-object (array :lowtag other-pointer-lowtag
74 (fill-pointer :type index
75 :ref-trans %array-fill-pointer
76 :ref-known (flushable foldable)
77 :set-trans (setf %array-fill-pointer)
79 (fill-pointer-p :type (member t nil)
80 :ref-trans %array-fill-pointer-p
81 :ref-known (flushable foldable)
82 :set-trans (setf %array-fill-pointer-p)
85 :ref-trans %array-available-elements
86 :ref-known (flushable foldable)
87 :set-trans (setf %array-available-elements)
90 :ref-trans %array-data-vector
91 :ref-known (flushable foldable)
92 :set-trans (setf %array-data-vector)
94 (displacement :type (or index null)
95 :ref-trans %array-displacement
96 :ref-known (flushable foldable)
97 :set-trans (setf %array-displacement)
99 (displaced-p :type (member t nil)
100 :ref-trans %array-displaced-p
101 :ref-known (flushable foldable)
102 :set-trans (setf %array-displaced-p)
104 (dimensions :rest-p t))
106 (define-primitive-object (vector :type vector
107 :lowtag other-pointer-lowtag
109 (length :ref-trans sb!c::vector-length
111 (data :rest-p t :c-type #!-alpha "unsigned long" #!+alpha "u32"))
113 (define-primitive-object (code :type code-component
114 :lowtag other-pointer-lowtag
116 (code-size :type index
117 :ref-known (flushable movable)
118 :ref-trans %code-code-size)
119 (entry-points :type (or function null)
120 :ref-known (flushable)
121 :ref-trans %code-entry-points
123 :set-trans (setf %code-entry-points))
125 :ref-known (flushable)
126 :ref-trans %code-debug-info
128 :set-trans (setf %code-debug-info))
130 (constants :rest-p t))
132 (define-primitive-object (fdefn :type fdefn
133 :lowtag other-pointer-lowtag
134 :header fdefn-widetag)
135 (name :ref-trans fdefn-name)
136 (fun :type (or function null) :ref-trans fdefn-fun)
137 (raw-addr :c-type #!-alpha "char *" #!+alpha "u32"))
139 ;;; a simple function (as opposed to hairier things like closures
140 ;;; which are also subtypes of Common Lisp's FUNCTION type)
141 (define-primitive-object (simple-fun :type function
142 :lowtag fun-pointer-lowtag
143 :header simple-fun-header-widetag)
144 #!-x86 (self :ref-trans %simple-fun-self
145 :set-trans (setf %simple-fun-self))
147 ;; KLUDGE: There's no :SET-KNOWN, :SET-TRANS, :REF-KNOWN, or
148 ;; :REF-TRANS here in this case. Instead, there's separate
149 ;; DEFKNOWN/DEFINE-VOP/DEFTRANSFORM stuff in
150 ;; compiler/x86/system.lisp to define and declare them by
151 ;; hand. I don't know why this is, but that's (basically)
152 ;; the way it was done in CMU CL, and it works. (It's not
153 ;; exactly the same way it was done in CMU CL in that CMU
154 ;; CL's allows duplicate DEFKNOWNs, blithely overwriting any
155 ;; previous data associated with the previous DEFKNOWN, and
156 ;; that property was used to mask the definitions here. In
157 ;; SBCL as of 0.6.12.64 that's not allowed -- too confusing!
158 ;; -- so we have to explicitly suppress the DEFKNOWNish
159 ;; stuff here in order to allow this old hack to work in the
160 ;; new world. -- WHN 2001-08-82
162 (next :type (or function null)
163 :ref-known (flushable)
164 :ref-trans %simple-fun-next
166 :set-trans (setf %simple-fun-next))
167 (name :ref-known (flushable)
168 :ref-trans %simple-fun-name
170 :set-trans (setf %simple-fun-name))
171 (arglist :ref-known (flushable)
172 :ref-trans %simple-fun-arglist
174 :set-trans (setf %simple-fun-arglist))
175 (type :ref-known (flushable)
176 :ref-trans %simple-fun-type
178 :set-trans (setf %simple-fun-type))
179 (code :rest-p t :c-type "unsigned char"))
181 (define-primitive-object (return-pc :lowtag other-pointer-lowtag :header t)
182 (return-point :c-type "unsigned char" :rest-p t))
184 (define-primitive-object (closure :lowtag fun-pointer-lowtag
185 :header closure-header-widetag)
186 (fun :init :arg :ref-trans %closure-fun)
189 (define-primitive-object (funcallable-instance
190 :lowtag fun-pointer-lowtag
191 :header funcallable-instance-header-widetag
192 :alloc-trans %make-funcallable-instance)
195 :ref-known (flushable) :ref-trans %funcallable-instance-fun
196 :set-known (unsafe) :set-trans (setf %funcallable-instance-fun))
199 :ref-known (flushable) :ref-trans %funcallable-instance-fun
200 ;; KLUDGE: There's no :SET-KNOWN or :SET-TRANS in this case.
201 ;; Instead, later in compiler/x86/system.lisp there's a separate
202 ;; DEFKNOWN for (SETF %FUNCALLABLE-INSTANCE-FUN), and a weird
203 ;; unexplained DEFTRANSFORM from (SETF %SIMPLE-FUN-INSTANCE-FUN)
204 ;; into (SETF %SIMPLE-FUN-SELF). The #!+X86 wrapped around this case
205 ;; is a literal translation of the old CMU CL implementation into
206 ;; the new world of sbcl-0.6.12.63, where multiple DEFKNOWNs for
207 ;; the same operator cause an error (instead of silently deleting
208 ;; all information associated with the old DEFKNOWN, as before).
209 ;; It's definitely not very clean, with too many #!+ conditionals and
210 ;; too little documentation, but I have more urgent things to
211 ;; clean up right now, so I've just left it as a literal
212 ;; translation without trying to fix it. -- WHN 2001-08-02
214 (lexenv :ref-known (flushable) :ref-trans %funcallable-instance-lexenv
215 :set-known (unsafe) :set-trans (setf %funcallable-instance-lexenv))
217 :ref-known (flushable) :ref-trans %funcallable-instance-layout
218 :set-known (unsafe) :set-trans (setf %funcallable-instance-layout))
221 (define-primitive-object (value-cell :lowtag other-pointer-lowtag
222 :header value-cell-header-widetag
223 :alloc-trans make-value-cell)
224 (value :set-trans value-cell-set
226 :ref-trans value-cell-ref
227 :ref-known (flushable)
231 (define-primitive-object (sap :lowtag other-pointer-lowtag
234 (pointer :c-type "char *" :length 2))
237 (define-primitive-object (sap :lowtag other-pointer-lowtag
239 (pointer :c-type "char *"))
242 (define-primitive-object (weak-pointer :type weak-pointer
243 :lowtag other-pointer-lowtag
244 :header weak-pointer-widetag
245 :alloc-trans make-weak-pointer)
246 (value :ref-trans sb!c::%weak-pointer-value :ref-known (flushable)
248 (broken :type (member t nil)
249 :ref-trans sb!c::%weak-pointer-broken :ref-known (flushable)
251 (next :c-type #!-alpha "struct weak_pointer *" #!+alpha "u32"))
253 ;;;; other non-heap data blocks
255 (define-primitive-object (binding)
259 (define-primitive-object (unwind-block)
260 (current-uwp :c-type #!-alpha "struct unwind_block *" #!+alpha "u32")
261 (current-cont :c-type #!-alpha "lispobj *" #!+alpha "u32")
265 (define-primitive-object (catch-block)
266 (current-uwp :c-type #!-alpha "struct unwind_block *" #!+alpha "u32")
267 (current-cont :c-type #!-alpha "lispobj *" #!+alpha "u32")
271 (previous-catch :c-type #!-alpha "struct catch_block *" #!+alpha "u32")
274 ;;; (For an explanation of this, see the comments at the definition of
275 ;;; KLUDGE-NONDETERMINISTIC-CATCH-BLOCK-SIZE.)
276 (aver (= sb!vm::kludge-nondeterministic-catch-block-size catch-block-size))
281 (defknown symbol-hash (symbol) (integer 0 #.*target-most-positive-fixnum*)
284 (define-primitive-object (symbol :lowtag other-pointer-lowtag
285 :header symbol-header-widetag
286 #!-x86 :alloc-trans #!-x86 make-symbol)
287 (value :set-trans %set-symbol-value
290 (plist :ref-trans symbol-plist
291 :set-trans %set-symbol-plist
293 (name :ref-trans symbol-name :init :arg)
294 (package :ref-trans symbol-package
295 :set-trans %set-symbol-package
298 (define-primitive-object (complex-single-float
299 :lowtag other-pointer-lowtag
300 :header complex-single-float-widetag)
301 (real :c-type "float")
302 (imag :c-type "float"))
304 (define-primitive-object (complex-double-float
305 :lowtag other-pointer-lowtag
306 :header complex-double-float-widetag)
308 (real :c-type "double" :length 2)
309 (imag :c-type "double" :length 2))
312 (define-primitive-object (complex-long-float
313 :lowtag other-pointer-lowtag
314 :header complex-long-float-widetag)
316 (real :c-type "long double" :length #!+x86 3 #!+sparc 4)
317 (imag :c-type "long double" :length #!+x86 3 #!+sparc 4))