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1 | ;; Common Lisp bindings for GTK+ v2.x |
2 | ;; Copyright 2000-2005 Espen S. Johnsen <espen@users.sf.net> |
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3 | ;; |
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4 | ;; Permission is hereby granted, free of charge, to any person obtaining |
5 | ;; a copy of this software and associated documentation files (the |
6 | ;; "Software"), to deal in the Software without restriction, including |
7 | ;; without limitation the rights to use, copy, modify, merge, publish, |
8 | ;; distribute, sublicense, and/or sell copies of the Software, and to |
9 | ;; permit persons to whom the Software is furnished to do so, subject to |
10 | ;; the following conditions: |
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11 | ;; |
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12 | ;; The above copyright notice and this permission notice shall be |
13 | ;; included in all copies or substantial portions of the Software. |
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14 | ;; |
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15 | ;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
16 | ;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
17 | ;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
18 | ;; IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
19 | ;; CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
20 | ;; TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
21 | ;; SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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22 | |
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23 | ;; $Id: proxy.lisp,v 1.28 2006-02-06 18:12:19 espen Exp $ |
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24 | |
25 | (in-package "GLIB") |
26 | |
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27 | ;;;; Superclass for all metaclasses implementing some sort of virtual slots |
28 | |
29 | (eval-when (:compile-toplevel :load-toplevel :execute) |
9adccb27 |
30 | (defclass virtual-slots-class (standard-class) |
4d83a8a6 |
31 | ()) |
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32 | |
33 | (defclass direct-virtual-slot-definition (standard-direct-slot-definition) |
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34 | ((setter :reader slot-definition-setter :initarg :setter) |
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35 | (getter :reader slot-definition-getter :initarg :getter) |
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36 | (unbound :reader slot-definition-unbound :initarg :unbound) |
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37 | (boundp :reader slot-definition-boundp :initarg :boundp))) |
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38 | |
4d83a8a6 |
39 | (defclass effective-virtual-slot-definition (standard-effective-slot-definition) |
40 | ((setter :reader slot-definition-setter :initarg :setter) |
41 | (getter :reader slot-definition-getter :initarg :getter) |
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42 | (unbound :reader slot-definition-unbound :initarg :unbound) |
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43 | (boundp :reader slot-definition-boundp :initarg :boundp))) |
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44 | |
e2ebafb1 |
45 | (defclass direct-special-slot-definition (standard-direct-slot-definition) |
46 | ()) |
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47 | |
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48 | (defclass effective-special-slot-definition (standard-effective-slot-definition) |
49 | ())) |
50 | |
51 | (defvar *unbound-marker* (gensym "UNBOUND-MARKER-")) |
52 | |
53 | (defun most-specific-slot-value (instances slot &optional (default *unbound-marker*)) |
54 | (let ((object (find-if |
55 | #'(lambda (ob) |
56 | (and (slot-exists-p ob slot) (slot-boundp ob slot))) |
57 | instances))) |
58 | (if object |
59 | (slot-value object slot) |
60 | default))) |
61 | |
62 | (defmethod initialize-instance ((slotd effective-special-slot-definition) &rest initargs) |
63 | (declare (ignore initargs)) |
64 | (call-next-method) |
65 | (setf (slot-value slotd 'allocation) :instance)) |
66 | |
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67 | |
9adccb27 |
68 | (defmethod direct-slot-definition-class ((class virtual-slots-class) &rest initargs) |
e2ebafb1 |
69 | (case (getf initargs :allocation) |
70 | (:virtual (find-class 'direct-virtual-slot-definition)) |
71 | (:special (find-class 'direct-special-slot-definition)) |
72 | (t (call-next-method)))) |
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73 | |
9adccb27 |
74 | (defmethod effective-slot-definition-class ((class virtual-slots-class) &rest initargs) |
e2ebafb1 |
75 | (case (getf initargs :allocation) |
76 | (:virtual (find-class 'effective-virtual-slot-definition)) |
77 | (:special (find-class 'effective-special-slot-definition)) |
78 | (t (call-next-method)))) |
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79 | |
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80 | |
81 | (defmethod initialize-internal-slot-functions ((slotd effective-virtual-slot-definition)) |
eeda1c2d |
82 | (if (not (slot-boundp slotd 'getter)) |
83 | (setf |
4d83a8a6 |
84 | (slot-value slotd 'reader-function) |
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85 | #'(lambda (object) |
86 | (declare (ignore object)) |
87 | (error "Can't read slot: ~A" (slot-definition-name slotd))) |
88 | (slot-value slotd 'boundp-function) |
89 | #'(lambda (object) (declare (ignore object)) nil)) |
90 | |
91 | (let ((getter-function |
92 | (let ((getter (slot-value slotd 'getter))) |
93 | (etypecase getter |
94 | (function getter) |
95 | (symbol |
96 | #'(lambda (object) |
97 | (funcall getter object))) |
98 | (string |
99 | (let ((reader nil)) |
100 | (setf (slot-value slotd 'reader-function) |
101 | #'(lambda (object) |
102 | (unless reader |
12b7df04 |
103 | (setq reader |
104 | (mkbinding getter |
105 | (slot-definition-type slotd) 'pointer))) |
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106 | (funcall reader (foreign-location object)))))))))) |
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107 | |
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108 | (setf |
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109 | (slot-value slotd 'boundp-function) |
110 | (cond |
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111 | ((slot-boundp slotd 'unbound) |
112 | (let ((unbound-value (slot-value slotd 'unbound))) |
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113 | #'(lambda (object) |
114 | (not (eq (funcall getter-function object) unbound-value))))) |
115 | ((slot-boundp slotd 'boundp) |
116 | (let ((boundp (slot-value slotd 'boundp))) |
eeda1c2d |
117 | (etypecase boundp |
118 | (function boundp) |
119 | (symbol #'(lambda (object) |
120 | (funcall boundp object))) |
121 | (string (let ((reader ())) |
122 | #'(lambda (object) |
123 | (unless reader |
124 | (setq reader |
125 | (mkbinding boundp |
126 | (slot-definition-type slotd) 'pointer))) |
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127 | (funcall reader (foreign-location object)))))))) |
12b7df04 |
128 | ((multiple-value-bind (unbound-p unbound-value) |
129 | (unbound-value (slot-definition-type slotd)) |
130 | (when unbound-p |
131 | #'(lambda (object) |
132 | (not (eq (funcall getter-function object) unbound-value)))))) |
133 | (#'(lambda (object) (declare (ignore object)) t)))) |
eeda1c2d |
134 | |
135 | (setf |
136 | (slot-value slotd 'reader-function) |
137 | (cond |
138 | ((slot-boundp slotd 'unbound) |
139 | (let ((unbound (slot-value slotd 'unbound)) |
140 | (slot-name (slot-definition-name slotd))) |
12b7df04 |
141 | #'(lambda (object) |
142 | (let ((value (funcall getter-function object))) |
143 | (if (eq value unbound) |
144 | (slot-unbound (class-of object) object slot-name) |
145 | value))))) |
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146 | ((slot-boundp slotd 'boundp) |
147 | (let ((boundp-function (slot-value slotd 'boundp-function))) |
12b7df04 |
148 | #'(lambda (object) |
149 | (and |
150 | (funcall boundp-function object) |
151 | (funcall getter-function object))))) |
152 | ((multiple-value-bind (unbound-p unbound-value) |
153 | (unbound-value (slot-definition-type slotd)) |
154 | (let ((slot-name (slot-definition-name slotd))) |
155 | (when unbound-p |
156 | #'(lambda (object) |
157 | (let ((value (funcall getter-function object))) |
158 | (if (eq value unbound-value) |
159 | (slot-unbound (class-of object) object slot-name) |
160 | value))))))) |
eeda1c2d |
161 | (getter-function))))) |
162 | |
163 | (setf |
164 | (slot-value slotd 'writer-function) |
165 | (if (not (slot-boundp slotd 'setter)) |
166 | #'(lambda (object) |
167 | (declare (ignore object)) |
168 | (error "Can't set slot: ~A" (slot-definition-name slotd))) |
169 | (with-slots (setter) slotd |
4d83a8a6 |
170 | (etypecase setter |
171 | (function setter) |
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172 | ((or symbol cons) |
173 | #'(lambda (value object) |
174 | (funcall (fdefinition setter) value object))) |
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175 | (string |
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176 | (let ((writer ())) |
177 | (setf |
178 | (slot-value slotd 'writer-function) |
179 | #'(lambda (value object) |
180 | (unless writer |
181 | (setq writer |
182 | (mkbinding setter 'nil 'pointer |
183 | (slot-definition-type slotd)))) |
09f6e237 |
184 | (funcall writer (foreign-location object) value))))))))) |
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185 | |
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186 | (initialize-internal-slot-gfs (slot-definition-name slotd))) |
187 | |
188 | |
189 | |
eeda1c2d |
190 | (defmethod compute-slot-accessor-info ((slotd effective-virtual-slot-definition) type gf) |
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191 | nil) |
192 | |
9adccb27 |
193 | (defmethod compute-effective-slot-definition-initargs ((class virtual-slots-class) direct-slotds) |
eeda1c2d |
194 | (if (typep (first direct-slotds) 'direct-virtual-slot-definition) |
195 | (let ((initargs ())) |
196 | (let ((getter (most-specific-slot-value direct-slotds 'getter))) |
197 | (unless (eq getter *unbound-marker*) |
198 | (setf (getf initargs :getter) getter))) |
199 | (let ((setter (most-specific-slot-value direct-slotds 'setter))) |
200 | (unless (eq setter *unbound-marker*) |
201 | (setf (getf initargs :setter) setter))) |
202 | (let ((unbound (most-specific-slot-value direct-slotds 'unbound))) |
203 | (unless (eq unbound *unbound-marker*) |
204 | (setf (getf initargs :unbound) unbound))) |
205 | (let ((boundp (most-specific-slot-value direct-slotds 'boundp))) |
206 | (unless (eq boundp *unbound-marker*) |
207 | (setf (getf initargs :boundp) boundp))) |
208 | (nconc initargs (call-next-method))) |
4d83a8a6 |
209 | (call-next-method))) |
210 | |
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211 | |
94f15c3c |
212 | (defmethod slot-value-using-class |
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213 | ((class virtual-slots-class) (object standard-object) |
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214 | (slotd effective-virtual-slot-definition)) |
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215 | (if (funcall (slot-value slotd 'boundp-function) object) |
216 | (funcall (slot-value slotd 'reader-function) object) |
217 | (slot-unbound class object (slot-definition-name slotd)))) |
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218 | |
94f15c3c |
219 | (defmethod slot-boundp-using-class |
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220 | ((class virtual-slots-class) (object standard-object) |
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221 | (slotd effective-virtual-slot-definition)) |
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222 | (funcall (slot-value slotd 'boundp-function) object)) |
223 | |
224 | (defmethod (setf slot-value-using-class) |
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225 | (value (class virtual-slots-class) (object standard-object) |
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226 | (slotd effective-virtual-slot-definition)) |
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227 | (funcall (slot-value slotd 'writer-function) value object)) |
228 | |
229 | |
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230 | (defmethod validate-superclass |
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231 | ((class virtual-slots-class) (super standard-class)) |
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232 | t) |
233 | |
234 | |
235 | ;;;; Proxy cache |
236 | |
237 | (internal *instance-cache*) |
238 | (defvar *instance-cache* (make-hash-table :test #'eql)) |
239 | |
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240 | (defun cache-instance (instance &optional (weak-ref t)) |
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241 | (setf |
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242 | (gethash (sap-int (foreign-location instance)) *instance-cache*) |
982a215a |
243 | (if weak-ref |
244 | (make-weak-pointer instance) |
245 | instance))) |
94f15c3c |
246 | |
247 | (defun find-cached-instance (location) |
73572c12 |
248 | (let ((ref (gethash (sap-int location) *instance-cache*))) |
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249 | (when ref |
982a215a |
250 | (if (weak-pointer-p ref) |
251 | (weak-pointer-value ref) |
252 | ref)))) |
94f15c3c |
253 | |
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254 | (defun instance-cached-p (location) |
73572c12 |
255 | (gethash (sap-int location) *instance-cache*)) |
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256 | |
94f15c3c |
257 | (defun remove-cached-instance (location) |
73572c12 |
258 | (remhash (sap-int location) *instance-cache*)) |
94f15c3c |
259 | |
9adccb27 |
260 | ;; For debuging |
982a215a |
261 | (defun list-cached-instances () |
9adccb27 |
262 | (let ((instances ())) |
263 | (maphash #'(lambda (location ref) |
264 | (declare (ignore location)) |
982a215a |
265 | (push ref instances)) |
9adccb27 |
266 | *instance-cache*) |
267 | instances)) |
268 | |
94f15c3c |
269 | |
270 | |
271 | ;;;; Proxy for alien instances |
272 | |
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273 | ;; TODO: add a ref-counted-proxy subclass |
9adccb27 |
274 | (defclass proxy () |
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275 | ((location :allocation :special :reader foreign-location :type pointer)) |
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276 | (:metaclass virtual-slots-class)) |
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277 | |
9adccb27 |
278 | (defgeneric instance-finalizer (object)) |
279 | (defgeneric reference-foreign (class location)) |
280 | (defgeneric unreference-foreign (class location)) |
4a64c16d |
281 | (defgeneric invalidate-instance (object)) |
9adccb27 |
282 | |
3b167652 |
283 | (defmethod reference-foreign ((name symbol) location) |
284 | (reference-foreign (find-class name) location)) |
285 | |
286 | (defmethod unreference-foreign ((name symbol) location) |
287 | (unreference-foreign (find-class name) location)) |
288 | |
9adccb27 |
289 | (defmethod unreference-foreign :around ((class class) location) |
290 | (unless (null-pointer-p location) |
09f6e237 |
291 | (call-next-method))) |
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292 | |
0f134a29 |
293 | (defmethod print-object ((instance proxy) stream) |
294 | (print-unreadable-object (instance stream :type t :identity nil) |
09f6e237 |
295 | (if (slot-boundp instance 'location) |
296 | (format stream "at 0x~X" (sap-int (foreign-location instance))) |
297 | (write-string "at \"unbound\"" stream)))) |
94f15c3c |
298 | |
8958fa4a |
299 | (defmethod initialize-instance :around ((instance proxy) &rest initargs) |
300 | (declare (ignore initargs)) |
301 | (prog1 |
302 | (call-next-method) |
303 | (cache-instance instance) |
304 | (finalize instance (instance-finalizer instance)))) |
94f15c3c |
305 | |
306 | (defmethod instance-finalizer ((instance proxy)) |
09f6e237 |
307 | (let ((location (foreign-location instance)) |
9adccb27 |
308 | (class (class-of instance))) |
309 | ;; (unless (find-method #'unreference-foreign nil (list (class-of class) t) nil) |
310 | ;; (error "No matching method for UNREFERENCE-INSTANCE when called with class ~A" class)) |
311 | #'(lambda () |
1dbf4216 |
312 | (remove-cached-instance location) |
9adccb27 |
313 | (unreference-foreign class location)))) |
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314 | |
4a64c16d |
315 | (defmethod invalidate-instance ((instance proxy)) |
316 | (remove-cached-instance (foreign-location instance)) |
317 | (slot-makunbound instance 'location)) |
318 | |
94f15c3c |
319 | |
320 | ;;;; Metaclass used for subclasses of proxy |
321 | |
73572c12 |
322 | (defgeneric most-specific-proxy-superclass (class)) |
323 | (defgeneric direct-proxy-superclass (class)) |
09f6e237 |
324 | (defgeneric compute-foreign-size (class)) |
73572c12 |
325 | |
326 | |
94f15c3c |
327 | (eval-when (:compile-toplevel :load-toplevel :execute) |
9adccb27 |
328 | (defclass proxy-class (virtual-slots-class) |
09f6e237 |
329 | ((size :reader foreign-size))) |
94f15c3c |
330 | |
331 | (defclass direct-alien-slot-definition (direct-virtual-slot-definition) |
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332 | ((allocation :initform :alien) |
333 | (offset :reader slot-definition-offset :initarg :offset))) |
94f15c3c |
334 | |
335 | (defclass effective-alien-slot-definition (effective-virtual-slot-definition) |
4d83a8a6 |
336 | ((offset :reader slot-definition-offset :initarg :offset))) |
12d0437e |
337 | |
94f15c3c |
338 | (defmethod most-specific-proxy-superclass ((class proxy-class)) |
339 | (find-if |
340 | #'(lambda (class) |
341 | (subtypep (class-name class) 'proxy)) |
4d83a8a6 |
342 | (cdr (compute-class-precedence-list class)))) |
73572c12 |
343 | |
12d0437e |
344 | (defmethod direct-proxy-superclass ((class proxy-class)) |
345 | (find-if |
346 | #'(lambda (class) |
347 | (subtypep (class-name class) 'proxy)) |
4d83a8a6 |
348 | (class-direct-superclasses class))) |
349 | |
eeda1c2d |
350 | (defmethod shared-initialize ((class proxy-class) names &key size) |
94f15c3c |
351 | (call-next-method) |
12d0437e |
352 | (cond |
4d83a8a6 |
353 | (size (setf (slot-value class 'size) (first size))) |
9adccb27 |
354 | ((slot-boundp class 'size) (slot-makunbound class 'size)))) |
09f6e237 |
355 | |
4d83a8a6 |
356 | (defmethod direct-slot-definition-class ((class proxy-class) &rest initargs) |
94f15c3c |
357 | (case (getf initargs :allocation) |
e2ebafb1 |
358 | (:alien (find-class 'direct-alien-slot-definition)) |
94f15c3c |
359 | (t (call-next-method)))) |
4d83a8a6 |
360 | |
361 | (defmethod effective-slot-definition-class ((class proxy-class) &rest initargs) |
94f15c3c |
362 | (case (getf initargs :allocation) |
363 | (:alien (find-class 'effective-alien-slot-definition)) |
94f15c3c |
364 | (t (call-next-method)))) |
365 | |
4d83a8a6 |
366 | |
367 | (defmethod compute-effective-slot-definition-initargs ((class proxy-class) direct-slotds) |
368 | (if (eq (most-specific-slot-value direct-slotds 'allocation) :alien) |
369 | (nconc |
370 | (list :offset (most-specific-slot-value direct-slotds 'offset)) |
371 | (call-next-method)) |
372 | (call-next-method))) |
373 | |
374 | |
375 | (defmethod initialize-internal-slot-functions ((slotd effective-alien-slot-definition)) |
376 | (with-slots (offset) slotd |
9adccb27 |
377 | (let ((type (slot-definition-type slotd))) |
eeda1c2d |
378 | (unless (slot-boundp slotd 'getter) |
9adccb27 |
379 | (let ((reader (reader-function type))) |
380 | (setf |
eeda1c2d |
381 | (slot-value slotd 'getter) |
9adccb27 |
382 | #'(lambda (object) |
09f6e237 |
383 | (funcall reader (foreign-location object) offset))))) |
4d83a8a6 |
384 | |
eeda1c2d |
385 | (unless (slot-boundp slotd 'setter) |
9adccb27 |
386 | (let ((writer (writer-function type)) |
387 | (destroy (destroy-function type))) |
388 | (setf |
eeda1c2d |
389 | (slot-value slotd 'setter) |
9adccb27 |
390 | #'(lambda (value object) |
09f6e237 |
391 | (let ((location (foreign-location object))) |
9adccb27 |
392 | (funcall destroy location offset) ; destroy old value |
eeda1c2d |
393 | (funcall writer value location offset)))))))) |
394 | |
4d83a8a6 |
395 | (call-next-method)) |
396 | |
09f6e237 |
397 | (defmethod compute-foreign-size ((class proxy-class)) |
398 | nil) |
4d83a8a6 |
399 | |
4d83a8a6 |
400 | ;; TODO: call some C code to detect this a compile time |
401 | (defconstant +struct-alignmen+ 4) |
94f15c3c |
402 | |
09f6e237 |
403 | (defun align-offset (size) |
404 | (if (zerop (mod size +struct-alignmen+)) |
405 | size |
406 | (+ size (- +struct-alignmen+ (mod size +struct-alignmen+))))) |
407 | |
94f15c3c |
408 | (defmethod compute-slots ((class proxy-class)) |
09f6e237 |
409 | (let ((alien-slots |
410 | (remove-if-not |
411 | #'(lambda (slotd) |
412 | (eq (slot-definition-allocation slotd) :alien)) |
413 | (class-direct-slots class)))) |
414 | (when alien-slots |
415 | (loop |
416 | as offset = (align-offset (foreign-size |
417 | (most-specific-proxy-superclass class))) |
418 | then (align-offset |
419 | (+ |
420 | (slot-definition-offset slotd) |
421 | (size-of (slot-definition-type slotd)))) |
422 | for slotd in alien-slots |
423 | unless (slot-boundp slotd 'offset) |
424 | do (setf (slot-value slotd 'offset) offset)))) |
94f15c3c |
425 | (call-next-method)) |
3e15002d |
426 | |
09f6e237 |
427 | (defmethod compute-slots :after ((class proxy-class)) |
428 | (when (and (class-finalized-p class) (not (slot-boundp class 'size))) |
429 | (let ((size (compute-foreign-size class))) |
430 | (when size |
431 | (setf (slot-value class 'size) size))))) |
4d83a8a6 |
432 | |
433 | (defmethod validate-superclass ((class proxy-class) (super standard-class)) |
434 | (subtypep (class-name super) 'proxy)) |
435 | |
09f6e237 |
436 | (defmethod foreign-size ((class-name symbol)) |
437 | (foreign-size (find-class class-name)))) |
47a11c16 |
438 | |
09f6e237 |
439 | (defmethod foreign-size ((object proxy)) |
440 | (foreign-size (class-of object))) |
4d83a8a6 |
441 | |
09f6e237 |
442 | |
9adccb27 |
443 | (defmethod alien-type ((class proxy-class) &rest args) |
444 | (declare (ignore class args)) |
445 | (alien-type 'pointer)) |
446 | |
447 | (defmethod size-of ((class proxy-class) &rest args) |
448 | (declare (ignore class args)) |
449 | (size-of 'pointer)) |
450 | |
451 | (defmethod from-alien-form (location (class proxy-class) &rest args) |
452 | (declare (ignore args)) |
453 | `(ensure-proxy-instance ',(class-name class) ,location)) |
454 | |
455 | (defmethod from-alien-function ((class proxy-class) &rest args) |
456 | (declare (ignore args)) |
457 | #'(lambda (location) |
458 | (ensure-proxy-instance class location))) |
94f15c3c |
459 | |
9adccb27 |
460 | (defmethod to-alien-form (instance (class proxy-class) &rest args) |
461 | (declare (ignore class args)) |
09f6e237 |
462 | `(foreign-location ,instance)) |
94f15c3c |
463 | |
9adccb27 |
464 | (defmethod to-alien-function ((class proxy-class) &rest args) |
465 | (declare (ignore class args)) |
09f6e237 |
466 | #'foreign-location) |
9adccb27 |
467 | |
9ca5565a |
468 | (defmethod copy-from-alien-form (location (class proxy-class) &rest args) |
469 | (declare (ignore args)) |
470 | (let ((class-name (class-name class))) |
471 | `(ensure-proxy-instance ',class-name |
472 | (reference-foreign ',class-name ,location)))) |
473 | |
474 | (defmethod copy-from-alien-function ((class proxy-class) &rest args) |
475 | (declare (ignore args)) |
476 | #'(lambda (location) |
477 | (ensure-proxy-instance class (reference-foreign class location)))) |
478 | |
479 | (defmethod copy-to-alien-form (instance (class proxy-class) &rest args) |
480 | (declare (ignore args)) |
09f6e237 |
481 | `(reference-foreign ',(class-name class) (foreign-location ,instance))) |
9ca5565a |
482 | |
483 | (defmethod copy-to-alien-function ((class proxy-class) &rest args) |
73572c12 |
484 | (declare (ignore args)) |
9ca5565a |
485 | #'(lambda (instance) |
09f6e237 |
486 | (reference-foreign class (foreign-location instance)))) |
9ca5565a |
487 | |
9adccb27 |
488 | (defmethod writer-function ((class proxy-class) &rest args) |
489 | (declare (ignore args)) |
490 | #'(lambda (instance location &optional (offset 0)) |
491 | (assert (null-pointer-p (sap-ref-sap location offset))) |
492 | (setf |
493 | (sap-ref-sap location offset) |
09f6e237 |
494 | (reference-foreign class (foreign-location instance))))) |
94f15c3c |
495 | |
9adccb27 |
496 | (defmethod reader-function ((class proxy-class) &rest args) |
497 | (declare (ignore args)) |
3005806e |
498 | #'(lambda (location &optional (offset 0) weak-p) |
499 | (declare (ignore weak-p)) |
9ca5565a |
500 | (let ((instance (sap-ref-sap location offset))) |
501 | (unless (null-pointer-p instance) |
502 | (ensure-proxy-instance class (reference-foreign class instance)))))) |
94f15c3c |
503 | |
9adccb27 |
504 | (defmethod destroy-function ((class proxy-class) &rest args) |
505 | (declare (ignore args)) |
506 | #'(lambda (location &optional (offset 0)) |
507 | (unreference-foreign class (sap-ref-sap location offset)))) |
508 | |
12b7df04 |
509 | (defmethod unbound-value ((class proxy-class) &rest args) |
47a11c16 |
510 | (declare (ignore args)) |
12b7df04 |
511 | (values t nil)) |
9adccb27 |
512 | |
8958fa4a |
513 | (defun ensure-proxy-instance (class location &rest initargs) |
514 | "Returns a proxy object representing the foreign object at the give |
515 | location. If an existing object is not found in the cache |
516 | MAKE-PROXY-INSTANCE is called to create one." |
9adccb27 |
517 | (unless (null-pointer-p location) |
518 | (or |
aaced14e |
519 | #-debug-ref-counting(find-cached-instance location) |
520 | #+debug-ref-counting |
4a64c16d |
521 | (let ((instance (find-cached-instance location))) |
522 | (when instance |
523 | (format t "Object found in cache: ~A~%" instance) |
524 | instance)) |
8958fa4a |
525 | (let ((instance (apply #'make-proxy-instance class location initargs))) |
526 | (cache-instance instance) |
527 | instance)))) |
528 | |
529 | (defgeneric make-proxy-instance (class location &key weak) |
530 | (:documentation "Creates a new proxy object representing the foreign |
531 | object at the give location. If WEAK is non NIL the foreign memory |
532 | will not be released when the proxy is garbage collected.")) |
533 | |
4a64c16d |
534 | (defmethod make-proxy-instance ((class symbol) location &rest initargs) |
535 | (apply #'make-proxy-instance (find-class class) location initargs)) |
8958fa4a |
536 | |
537 | (defmethod make-proxy-instance ((class proxy-class) location &key weak) |
8958fa4a |
538 | (let ((instance (allocate-instance class))) |
539 | (setf (slot-value instance 'location) location) |
540 | (unless weak |
541 | (finalize instance (instance-finalizer instance))) |
542 | instance)) |
94f15c3c |
543 | |
12d0437e |
544 | |
545 | ;;;; Superclasses for wrapping of C structures |
94f15c3c |
546 | |
9adccb27 |
547 | (defclass struct (proxy) |
548 | () |
09f6e237 |
549 | (:metaclass proxy-class) |
550 | (:size 0)) |
94f15c3c |
551 | |
9adccb27 |
552 | (defmethod initialize-instance ((struct struct) &rest initargs) |
94f15c3c |
553 | (declare (ignore initargs)) |
ec1a4146 |
554 | (unless (slot-boundp struct 'location) |
09f6e237 |
555 | (let ((size (foreign-size (class-of struct)))) |
ec1a4146 |
556 | (if (zerop size) |
557 | (error "~A has zero size" (class-of struct)) |
47a11c16 |
558 | (setf (slot-value struct 'location) (allocate-memory size))))) |
94f15c3c |
559 | (call-next-method)) |
560 | |
561 | |
9adccb27 |
562 | ;;;; Metaclasses used for subclasses of struct |
563 | |
564 | (defclass struct-class (proxy-class) |
565 | ()) |
94f15c3c |
566 | |
e2ebafb1 |
567 | (defmethod direct-slot-definition-class ((class struct-class) &rest initargs) |
568 | (if (not (getf initargs :allocation)) |
569 | (find-class 'direct-alien-slot-definition) |
570 | (call-next-method))) |
571 | |
9adccb27 |
572 | (defmethod reference-foreign ((class struct-class) location) |
09f6e237 |
573 | (copy-memory location (foreign-size class))) |
9adccb27 |
574 | |
575 | (defmethod unreference-foreign ((class struct-class) location) |
12d0437e |
576 | (deallocate-memory location)) |
94f15c3c |
577 | |
09f6e237 |
578 | (defmethod compute-foreign-size ((class struct-class)) |
579 | (let ((size (loop |
580 | for slotd in (class-slots class) |
581 | when (eq (slot-definition-allocation slotd) :alien) |
582 | maximize (+ |
583 | (slot-definition-offset slotd) |
584 | (size-of (slot-definition-type slotd)))))) |
585 | (+ size (mod size +struct-alignmen+)))) |
586 | |
3005806e |
587 | (defmethod reader-function ((class struct-class) &rest args) |
4a64c16d |
588 | (declare (ignore args)) |
3005806e |
589 | #'(lambda (location &optional (offset 0) weak-p) |
4a64c16d |
590 | (let ((instance (sap-ref-sap location offset))) |
591 | (unless (null-pointer-p instance) |
3005806e |
592 | (if weak-p |
593 | (ensure-proxy-instance class instance :weak t) |
594 | (ensure-proxy-instance class (reference-foreign class instance))))))) |
4a64c16d |
595 | |
94f15c3c |
596 | |
9adccb27 |
597 | (defclass static-struct-class (struct-class) |
598 | ()) |
94f15c3c |
599 | |
9adccb27 |
600 | (defmethod reference-foreign ((class static-struct-class) location) |
601 | (declare (ignore class)) |
12d0437e |
602 | location) |
94f15c3c |
603 | |
9adccb27 |
604 | (defmethod unreference-foreign ((class static-struct-class) location) |
605 | (declare (ignore class location)) |
12d0437e |
606 | nil) |
bde0b906 |
607 | |
3005806e |
608 | (defmethod reader-function ((class struct-class) &rest args) |
609 | (declare (ignore args)) |
610 | #'(lambda (location &optional (offset 0) weak-p) |
611 | (declare (ignore weak-p)) |
612 | (let ((instance (sap-ref-sap location offset))) |
613 | (unless (null-pointer-p instance) |
614 | (ensure-proxy-instance class instance :weak t))))) |
615 | |
bde0b906 |
616 | |
617 | ;;; Pseudo type for structs which are inlined in other objects |
618 | |
619 | (defmethod size-of ((type (eql 'inlined)) &rest args) |
620 | (declare (ignore type)) |
09f6e237 |
621 | (foreign-size (first args))) |
bde0b906 |
622 | |
623 | (defmethod reader-function ((type (eql 'inlined)) &rest args) |
624 | (declare (ignore type)) |
625 | (destructuring-bind (class) args |
3005806e |
626 | #'(lambda (location &optional (offset 0) weak-p) |
627 | (declare (ignore weak-p)) |
bde0b906 |
628 | (ensure-proxy-instance class |
629 | (reference-foreign class (sap+ location offset)))))) |
630 | |
4a64c16d |
631 | (defmethod writer-function ((type (eql 'inlined)) &rest args) |
632 | (declare (ignore type)) |
633 | (destructuring-bind (class) args |
634 | #'(lambda (instance location &optional (offset 0)) |
635 | (copy-memory (foreign-location instance) (foreign-size class) (sap+ location offset))))) |
636 | |
bde0b906 |
637 | (defmethod destroy-function ((type (eql 'inlined)) &rest args) |
638 | (declare (ignore args)) |
639 | #'(lambda (location &optional (offset 0)) |
640 | (declare (ignore location offset)))) |
641 | |
642 | (export 'inlined) |