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1 | ;;; -*-lisp-*- |
2 | ;;; | |
3 | ;;; Builtin module provides basic definitions | |
4 | ;;; | |
5 | ;;; (c) 2009 Straylight/Edgeware | |
6 | ;;; | |
7 | ||
8 | ;;;----- Licensing notice --------------------------------------------------- | |
9 | ;;; | |
10 | ;;; This file is part of the Simple Object Definition system. | |
11 | ;;; | |
12 | ;;; SOD is free software; you can redistribute it and/or modify | |
13 | ;;; it under the terms of the GNU General Public License as published by | |
14 | ;;; the Free Software Foundation; either version 2 of the License, or | |
15 | ;;; (at your option) any later version. | |
16 | ;;; | |
17 | ;;; SOD is distributed in the hope that it will be useful, | |
18 | ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;;; GNU General Public License for more details. | |
21 | ;;; | |
22 | ;;; You should have received a copy of the GNU General Public License | |
23 | ;;; along with SOD; if not, write to the Free Software Foundation, | |
24 | ;;; Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
25 | ||
26 | (cl:in-package #:sod) | |
27 | ||
28 | ;;;-------------------------------------------------------------------------- | |
29 | ;;; Output of class instances. | |
30 | ||
31 | (defun output-imprint-function (class stream) | |
32 | (let ((ilayout (sod-class-ilayout class))) | |
33 | (format stream "~&~: | |
34 | static void *~A__imprint(void *p) | |
35 | { | |
36 | struct ~A *sod__obj = p; | |
37 | ||
38 | ~:{sod__obj.~A._vt = &~A;~:^~% ~} | |
39 | return (p); | |
40 | }~2%" | |
41 | class | |
42 | (ilayout-struct-tag class) | |
43 | (mapcar (lambda (ichain) | |
44 | (list (sod-class-nickname (ichain-head ichain)) | |
45 | (vtable-name class (ichain-head ichain)))) | |
46 | (ilayout-ichains ilayout))))) | |
47 | ||
48 | (defun output-init-function (class stream) | |
49 | ;; FIXME this needs a metaobject protocol | |
50 | (let ((ilayout (sod-class-ilayout class))) | |
51 | (format stream "~&~: | |
52 | static void *~A__init(void *p) | |
53 | { | |
54 | struct ~A *sod__obj = ~0@*~A__imprint(p);~2%" | |
55 | class | |
56 | (ilayout-struct-tag class)) | |
57 | (dolist (ichain (ilayout-ichains ilayout)) | |
58 | (let ((ich (format nil "sod__obj.~A" | |
59 | (sod-class-nickname (ichain-head ichain))))) | |
60 | (dolist (item (ichain-body ichain)) | |
61 | (etypecase item | |
62 | (vtable-pointer | |
63 | (format stream " ~A._vt = &~A;~%" | |
64 | ich (vtable-name class (ichain-head ichain)))) | |
65 | (islots | |
66 | (let ((isl (format nil "~A.~A" | |
67 | ich | |
68 | (sod-class-nickname (islots-class item))))) | |
69 | (dolist (slot (islots-slots item)) | |
70 | (let ((dslot (effective-slot-direct-slot slot)) | |
71 | (init (effective-slot-initializer slot))) | |
72 | (when init | |
73 | (ecase (sod-initializer-value-kind init) | |
74 | (:single | |
75 | (format stream " ~A = ~A;~%" | |
76 | isl (sod-initializer-value-form slot))) | |
77 | (:compound | |
78 | (format stream " ~A = (~A)~A;~%" | |
79 | isl (sod-slot-type dslot) | |
80 | (sod-initializer-value-form slot))))))))))))) | |
81 | (format stream "~&~: | |
82 | return (p); | |
83 | }~2%"))) | |
84 | ||
85 | (defun output-supers-vector (class stream) | |
86 | (let ((supers (sod-class-direct-superclasses class))) | |
87 | (when supers | |
88 | (format stream "~&~: | |
89 | static const SodClass *const ~A__supers[] = { | |
90 | ~{~A__class~^,~% ~} | |
91 | };~2%" | |
92 | class supers)))) | |
93 | ||
94 | (defun output-cpl-vector (class stream) | |
95 | (format stream "~&~: | |
96 | static const SodClass *const ~A__cpl[] = { | |
97 | ~{~A__class~^,~% ~} | |
98 | };~2%" | |
99 | class (sod-class-precedence-list class))) | |
100 | ||
101 | (defun output-chains-vector (class stream) | |
102 | (let ((chains (sod-class-chains class))) | |
103 | (format stream "~&~: | |
104 | ~1@*~:{static const SodClass *const ~A__chain_~A[] = { | |
105 | ~{ ~A__class~^,~%~} | |
106 | };~:^~2%~} | |
107 | ||
108 | ~0@*static const struct sod_chain ~A__chains[] = { | |
109 | ~:{ { ~3@*~A, | |
110 | ~0@*&~A__chain_~A, | |
111 | ~4@*offsetof(struct ~A, ~A), | |
112 | (const struct sod_vtable *)&~A, | |
113 | sizeof(struct ~A) }~:^,~%~} | |
114 | };~2%" | |
115 | class ;0 | |
116 | (mapcar (lambda (chain) ;1 | |
117 | (let* ((head (sod-class-chain-head (car chain))) | |
118 | (chain-nick (sod-class-nickname head))) | |
119 | (list class chain-nick ;0 1 | |
120 | (reverse chain) ;2 | |
121 | (length chain) ;3 | |
122 | (ilayout-struct-tag class) chain-nick ;4 5 | |
123 | (vtable-name class head) ;6 | |
124 | (ichain-struct-tag class head)))) ;7 | |
125 | chains)))) | |
126 | ||
127 | (defclass sod-class-slot (sod-slot) | |
128 | ((initializer-function :initarg :initializer-function | |
129 | :type (or symbol function) | |
130 | :reader sod-slot-initializer-function) | |
131 | (prepare-function :initarg :prepare-function :type (or symbol function) | |
132 | :reader sod-slot-prepare-function)) | |
133 | (:documentation | |
134 | "Special class for slots defined on SodClass. | |
135 | ||
136 | These slots need class-specific initialization. It's easier to keep all | |
137 | of the information (name, type, and how to initialize them) about these | |
138 | slots in one place, so that's what we do here.")) | |
139 | ||
140 | (defmethod shared-initialize :after | |
141 | ((slot sod-class-slot) slot-names &key pset) | |
142 | (declare (ignore slot-names)) | |
143 | (default-slot (slot 'initializer-function) | |
144 | (get-property pset :initializer-function t nil)) | |
145 | (default-slot (slot 'prepare-function) | |
146 | (get-property pset :prepare-function t nil))) | |
147 | ||
148 | (defclass sod-class-effective-slot (effective-slot) | |
149 | ((initializer-function :initarg :initializer-function | |
150 | :type (or symbol function) | |
151 | :reader effective-slot-initializer-function) | |
152 | (prepare-function :initarg :prepare-function :type (or symbol function) | |
153 | :reader effective-slot-prepare-function)) | |
154 | (:documentation | |
155 | "Special class for slots defined on SodClass. | |
156 | ||
157 | This class ignores any explicit initializers and computes initializer | |
158 | values using the slot's INIT-FUNC slot and a magical protocol during | |
159 | metaclass instance construction.")) | |
160 | ||
161 | (defmethod compute-effective-slot ((class sod-class) (slot sod-class-slot)) | |
162 | (make-instance 'sod-class-effective-slot | |
163 | :slot slot | |
164 | :initializer-function (sod-slot-initializer-function slot) | |
165 | :prepare-function (sod-slot-prepare-function slot) | |
166 | :initializer (find-slot-initializer class slot))) | |
167 | ||
168 | ;;;-------------------------------------------------------------------------- | |
169 | ;;; Class slots table. | |
170 | ||
171 | (defparameter *sod-class-slots* | |
172 | `( | |
173 | ||
174 | ;; Basic informtion. | |
175 | ("name" ,(c-type const-string) | |
176 | :initializer-function | |
177 | ,(lambda (class) | |
178 | (prin1-to-string (sod-class-name class)))) | |
179 | ("nick" ,(c-type const-string) | |
180 | :initializer-function | |
181 | ,(lambda (class) | |
182 | (prin1-to-string (sod-class-nickname class)))) | |
183 | ||
184 | ;; Instance allocation and initialization. | |
185 | ("instsz" ,(c-type size-t) | |
186 | :initializer-function | |
187 | ,(lambda (class) | |
188 | (format nil "sizeof(struct ~A)" | |
189 | (ilayout-struct-tag class)))) | |
190 | ("imprint" ,(c-type (* (fun (* void) ("p" (* void))))) | |
191 | :prepare-function 'output-imprint-function | |
192 | :initializer-function | |
193 | ,(lambda (class) | |
194 | (format nil "~A__imprint" class))) | |
195 | ("init" ,(c-type (* (fun (* void) ("p" (* void))))) | |
196 | :prepare-function 'output-init-function | |
197 | :initializer-function | |
198 | ,(lambda (class) | |
199 | (format nil "~A__init" class))) | |
200 | ||
201 | ;; Superclass structure. | |
202 | ("n_supers" ,(c-type size-t) | |
203 | :initializer-function | |
204 | ,(lambda (class) | |
205 | (length (sod-class-direct-superclasses class)))) | |
206 | ("supers" ,(c-type (* (* (class "SodClass" :const) :const))) | |
207 | :prepare-function 'output-supers-vector | |
208 | :initializer-function | |
209 | ,(lambda (class) | |
210 | (if (sod-class-direct-superclasses class) | |
211 | (format nil "~A__supers" class) | |
212 | 0))) | |
213 | ("n_cpl" ,(c-type size-t) | |
214 | :initializer-function | |
215 | ,(lambda (class) | |
216 | (length (sod-class-precedence-list class)))) | |
217 | ("cpl" ,(c-type (* (* (class "SodClass" :const) :const))) | |
218 | :prepare-function 'output-cpl-vector | |
219 | :initializer-function | |
220 | ,(lambda (class) | |
221 | (format nil "~A__cpl" class))) | |
222 | ||
223 | ;; Chain structure. | |
224 | ("link" ,(c-type (* (class "SodClass" :const))) | |
225 | :initializer-function | |
226 | ,(lambda (class) | |
227 | (let ((link (sod-class-chain-link class))) | |
228 | (if link | |
229 | (format nil "~A__class" link) | |
230 | 0)))) | |
231 | ("head" ,(c-type (* (class "SodClass" :const))) | |
232 | :initializer-function | |
233 | ,(lambda (class) | |
234 | (format nil "~A__class" (sod-class-chain-head class)))) | |
235 | ("level" ,(c-type size-t) | |
236 | :initializer-function | |
237 | ,(lambda (class) | |
238 | (position class (reverse (sod-class-chain class))))) | |
239 | ("n_chains" ,(c-type size-t) | |
240 | :initializer-function | |
241 | ,(lambda (class) | |
242 | (length (sod-class-chains class)))) | |
243 | ("chains" ,(c-type (* (struct "sod_chain" :const))) | |
244 | :prepare-function 'output-chains-vector | |
245 | :initializer-function | |
246 | ,(lambda (class) | |
247 | (format nil "~A__chains" class))) | |
248 | ||
249 | ;; Class-specific layout. | |
250 | ("off_islots" ,(c-type size-t) | |
251 | :initializer-function | |
252 | ,(lambda (class) | |
253 | (format nil "offsetof(struct ~A, ~A)" | |
254 | (ichain-struct-tag class | |
255 | (sod-class-chain-head class)) | |
256 | (sod-class-nickname class)))) | |
257 | ("islotsz" ,(c-type size-t) | |
258 | :initializer-function | |
259 | ,(lambda (class) | |
260 | (format nil "sizeof(struct ~A)" | |
261 | (islots-struct-tag class)))))) | |
262 | ||
263 | ;;;-------------------------------------------------------------------------- | |
264 | ;;; Bootstrapping the class graph. | |
265 | ||
266 | (defun bootstrap-classes (module) | |
267 | (let* ((sod-object (make-sod-class "SodObject" nil | |
268 | (make-property-set :nick 'obj))) | |
269 | (sod-class (make-sod-class "SodClass" (list sod-object) | |
270 | (make-property-set :nick 'cls))) | |
271 | (classes (list sod-object sod-class))) | |
272 | ||
273 | ;; Sort out the recursion. | |
274 | (setf (slot-value sod-class 'chain-link) sod-object) | |
275 | (dolist (class classes) | |
276 | (setf (slot-value class 'metaclass) sod-class)) | |
277 | ||
278 | ;; Predeclare the class types. | |
279 | (dolist (class classes) | |
280 | (make-class-type (sod-class-name class))) | |
281 | ||
282 | ;; Attach the class slots. | |
283 | (loop for (name type . plist) in *sod-class-slots* | |
284 | do (make-sod-slot sod-class name type | |
285 | (apply #'make-property-set | |
286 | :lisp-class 'sod-class-slot | |
287 | plist))) | |
288 | ||
289 | ;; These classes are too closely intertwined. We must partially finalize | |
290 | ;; them together by hand. This is cloned from FINALIZE-SOD-CLASS. | |
291 | (dolist (class classes) | |
292 | (with-slots (class-precedence-list chain-head chain chains) class | |
293 | (setf class-precedence-list (compute-cpl class)) | |
294 | (setf (values chain-head chain chains) (compute-chains class)))) | |
295 | ||
296 | ;; Done. | |
297 | (dolist (class classes) | |
298 | (finalize-sod-class class) | |
299 | (add-to-module module class)))) | |
300 | ||
301 | (defun make-builtin-module () | |
302 | (let ((module (make-instance 'module | |
303 | :name (make-pathname :name "BUILTIN" | |
304 | :type "SOD" | |
305 | :case :common) | |
306 | :state nil)) | |
307 | (*type-map* (make-hash-table :test #'equal))) | |
308 | (dolist (name '("va_list" "size_t" "ptrdiff_t")) | |
309 | (add-to-module module (make-instance 'type-item :name name))) | |
310 | (bootstrap-classes module) | |
311 | module)) | |
312 | ||
313 | (defun reset-builtin-module () | |
314 | (setf *builtin-module* (make-builtin-module)) | |
315 | (module-import *builtin-module*)) | |
316 | ||
317 | ;;;-------------------------------------------------------------------------- | |
318 | ;;; Testing. | |
319 | ||
320 | #+test | |
321 | (define-sod-class "AbstractStack" ("SodObject") | |
322 | :nick 'abstk | |
323 | (message "emptyp" (fun int)) | |
324 | (message "push" (fun void ("item" (* void)))) | |
325 | (message "pop" (fun (* void))) | |
326 | (method "abstk" "pop" (fun void) #{ | |
327 | assert(!me->_vt.emptyp()); | |
328 | } | |
329 | :role :before)) | |
330 | ||
331 | ;;;----- That's all, folks -------------------------------------------------- |