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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 1.33 2006-02-15 09:45:41 espen Exp $ |
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24 | |
25 | (in-package "GLIB") |
26 | |
94f15c3c |
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 | |
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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) |
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46 | ((special :initarg :special :accessor slot-definition-special))) |
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47 | |
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48 | (defclass effective-special-slot-definition (standard-effective-slot-definition) |
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49 | ((special :initarg :special :accessor slot-definition-special)))) |
e2ebafb1 |
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 | |
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62 | |
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63 | (defmethod direct-slot-definition-class ((class virtual-slots-class) &rest initargs) |
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64 | (cond |
65 | ((eq (getf initargs :allocation) :virtual) |
66 | (find-class 'direct-virtual-slot-definition)) |
67 | ((getf initargs :special) |
68 | (find-class 'direct-special-slot-definition)) |
69 | (t (call-next-method)))) |
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70 | |
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71 | (defmethod effective-slot-definition-class ((class virtual-slots-class) &rest initargs) |
b19bbc94 |
72 | (cond |
73 | ((eq (getf initargs :allocation) :virtual) |
74 | (find-class 'effective-virtual-slot-definition)) |
75 | ((getf initargs :special) |
76 | (find-class 'effective-special-slot-definition)) |
77 | (t (call-next-method)))) |
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78 | |
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79 | |
80 | (defmethod initialize-internal-slot-functions ((slotd effective-virtual-slot-definition)) |
eeda1c2d |
81 | (if (not (slot-boundp slotd 'getter)) |
82 | (setf |
4d83a8a6 |
83 | (slot-value slotd 'reader-function) |
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84 | #'(lambda (object) |
85 | (declare (ignore object)) |
308bfcab |
86 | (error "Slot is not readable: ~A" (slot-definition-name slotd))) |
eeda1c2d |
87 | (slot-value slotd 'boundp-function) |
88 | #'(lambda (object) (declare (ignore object)) nil)) |
89 | |
90 | (let ((getter-function |
91 | (let ((getter (slot-value slotd 'getter))) |
92 | (etypecase getter |
93 | (function getter) |
94 | (symbol |
95 | #'(lambda (object) |
96 | (funcall getter object))) |
97 | (string |
98 | (let ((reader nil)) |
99 | (setf (slot-value slotd 'reader-function) |
100 | #'(lambda (object) |
101 | (unless reader |
12b7df04 |
102 | (setq reader |
103 | (mkbinding getter |
104 | (slot-definition-type slotd) 'pointer))) |
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105 | (funcall reader (foreign-location object)))))))))) |
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106 | |
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107 | (setf |
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108 | (slot-value slotd 'boundp-function) |
109 | (cond |
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110 | ((slot-boundp slotd 'unbound) |
111 | (let ((unbound-value (slot-value slotd 'unbound))) |
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112 | #'(lambda (object) |
113 | (not (eq (funcall getter-function object) unbound-value))))) |
114 | ((slot-boundp slotd 'boundp) |
115 | (let ((boundp (slot-value slotd 'boundp))) |
eeda1c2d |
116 | (etypecase boundp |
117 | (function boundp) |
118 | (symbol #'(lambda (object) |
119 | (funcall boundp object))) |
120 | (string (let ((reader ())) |
121 | #'(lambda (object) |
122 | (unless reader |
123 | (setq reader |
124 | (mkbinding boundp |
125 | (slot-definition-type slotd) 'pointer))) |
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126 | (funcall reader (foreign-location object)))))))) |
12b7df04 |
127 | ((multiple-value-bind (unbound-p unbound-value) |
128 | (unbound-value (slot-definition-type slotd)) |
129 | (when unbound-p |
130 | #'(lambda (object) |
131 | (not (eq (funcall getter-function object) unbound-value)))))) |
132 | (#'(lambda (object) (declare (ignore object)) t)))) |
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133 | |
134 | (setf |
135 | (slot-value slotd 'reader-function) |
136 | (cond |
137 | ((slot-boundp slotd 'unbound) |
138 | (let ((unbound (slot-value slotd 'unbound)) |
139 | (slot-name (slot-definition-name slotd))) |
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140 | #'(lambda (object) |
141 | (let ((value (funcall getter-function object))) |
142 | (if (eq value unbound) |
143 | (slot-unbound (class-of object) object slot-name) |
144 | value))))) |
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145 | ((slot-boundp slotd 'boundp) |
146 | (let ((boundp-function (slot-value slotd 'boundp-function))) |
12b7df04 |
147 | #'(lambda (object) |
148 | (and |
149 | (funcall boundp-function object) |
150 | (funcall getter-function object))))) |
151 | ((multiple-value-bind (unbound-p unbound-value) |
152 | (unbound-value (slot-definition-type slotd)) |
153 | (let ((slot-name (slot-definition-name slotd))) |
154 | (when unbound-p |
155 | #'(lambda (object) |
156 | (let ((value (funcall getter-function object))) |
157 | (if (eq value unbound-value) |
158 | (slot-unbound (class-of object) object slot-name) |
159 | value))))))) |
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160 | (getter-function))))) |
161 | |
162 | (setf |
163 | (slot-value slotd 'writer-function) |
164 | (if (not (slot-boundp slotd 'setter)) |
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165 | #'(lambda (value object) |
166 | (declare (ignore value object)) |
167 | (error "Slot is not writable: ~A" (slot-definition-name slotd))) |
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168 | (with-slots (setter) slotd |
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169 | (etypecase setter |
170 | (function setter) |
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171 | ((or symbol cons) |
172 | #'(lambda (value object) |
173 | (funcall (fdefinition setter) value object))) |
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174 | (string |
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175 | (let ((writer ())) |
176 | (setf |
177 | (slot-value slotd 'writer-function) |
178 | #'(lambda (value object) |
179 | (unless writer |
180 | (setq writer |
181 | (mkbinding setter 'nil 'pointer |
182 | (slot-definition-type slotd)))) |
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183 | (funcall writer (foreign-location object) value))))))))) |
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184 | |
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185 | #-sbcl>=0.9.8(initialize-internal-slot-gfs (slot-definition-name slotd))) |
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186 | |
187 | |
188 | |
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189 | (defmethod compute-slot-accessor-info ((slotd effective-virtual-slot-definition) type gf) |
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190 | nil) |
191 | |
9adccb27 |
192 | (defmethod compute-effective-slot-definition-initargs ((class virtual-slots-class) direct-slotds) |
b19bbc94 |
193 | (typecase (first direct-slotds) |
194 | (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)))) |
209 | (direct-special-slot-definition |
210 | (append '(:special t) (call-next-method))) |
211 | (t (call-next-method)))) |
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212 | |
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213 | |
94f15c3c |
214 | (defmethod slot-value-using-class |
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215 | ((class virtual-slots-class) (object standard-object) |
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216 | (slotd effective-virtual-slot-definition)) |
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217 | (if (funcall (slot-value slotd 'boundp-function) object) |
218 | (funcall (slot-value slotd 'reader-function) object) |
219 | (slot-unbound class object (slot-definition-name slotd)))) |
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220 | |
94f15c3c |
221 | (defmethod slot-boundp-using-class |
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222 | ((class virtual-slots-class) (object standard-object) |
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223 | (slotd effective-virtual-slot-definition)) |
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224 | (funcall (slot-value slotd 'boundp-function) object)) |
225 | |
226 | (defmethod (setf slot-value-using-class) |
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227 | (value (class virtual-slots-class) (object standard-object) |
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228 | (slotd effective-virtual-slot-definition)) |
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229 | (funcall (slot-value slotd 'writer-function) value object)) |
230 | |
231 | |
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232 | (defmethod validate-superclass |
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233 | ((class virtual-slots-class) (super standard-class)) |
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234 | t) |
235 | |
236 | |
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237 | (defmethod slot-definition-special ((slotd standard-direct-slot-definition)) |
238 | (declare (ignore slotd)) |
239 | nil) |
240 | |
241 | (defmethod slot-definition-special ((slotd standard-effective-slot-definition)) |
242 | (declare (ignore slotd)) |
243 | nil) |
244 | |
245 | |
94f15c3c |
246 | ;;;; Proxy cache |
247 | |
94f15c3c |
248 | (defvar *instance-cache* (make-hash-table :test #'eql)) |
249 | |
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250 | (defun cache-instance (instance &optional (weak-ref t)) |
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251 | (setf |
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252 | (gethash (sap-int (foreign-location instance)) *instance-cache*) |
982a215a |
253 | (if weak-ref |
254 | (make-weak-pointer instance) |
255 | instance))) |
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256 | |
257 | (defun find-cached-instance (location) |
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258 | (let ((ref (gethash (sap-int location) *instance-cache*))) |
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259 | (when ref |
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260 | (if (weak-pointer-p ref) |
261 | (weak-pointer-value ref) |
262 | ref)))) |
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263 | |
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264 | (defun instance-cached-p (location) |
73572c12 |
265 | (gethash (sap-int location) *instance-cache*)) |
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266 | |
94f15c3c |
267 | (defun remove-cached-instance (location) |
73572c12 |
268 | (remhash (sap-int location) *instance-cache*)) |
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269 | |
9adccb27 |
270 | ;; For debuging |
982a215a |
271 | (defun list-cached-instances () |
9adccb27 |
272 | (let ((instances ())) |
273 | (maphash #'(lambda (location ref) |
274 | (declare (ignore location)) |
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275 | (push ref instances)) |
9adccb27 |
276 | *instance-cache*) |
277 | instances)) |
278 | |
ca01de1b |
279 | ;; Instances that gets invalidated tend to be short lived, but created |
280 | ;; in large numbers. So we're keeping them in a hash table to be able |
281 | ;; to reuse them (and thus reduce consing) |
282 | (defvar *invalidated-instance-cache* (make-hash-table :test #'eql)) |
283 | |
284 | (defun cache-invalidated-instance (instance) |
285 | (push instance |
286 | (gethash (class-of instance) *invalidated-instance-cache*))) |
287 | |
288 | (defun find-invalidated-instance (class) |
289 | (when (gethash class *invalidated-instance-cache*) |
290 | (pop (gethash class *invalidated-instance-cache*)))) |
291 | |
292 | (defun list-invalidated-instances () |
293 | (let ((instances ())) |
294 | (maphash #'(lambda (location ref) |
295 | (declare (ignore location)) |
296 | (push ref instances)) |
297 | *invalidated-instance-cache*) |
298 | instances)) |
299 | |
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300 | |
301 | |
302 | ;;;; Proxy for alien instances |
303 | |
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304 | ;; TODO: add a ref-counted-proxy subclass |
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305 | (defclass proxy () |
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306 | ((location :special t :type pointer)) |
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307 | (:metaclass virtual-slots-class)) |
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308 | |
9adccb27 |
309 | (defgeneric instance-finalizer (object)) |
310 | (defgeneric reference-foreign (class location)) |
311 | (defgeneric unreference-foreign (class location)) |
4a64c16d |
312 | (defgeneric invalidate-instance (object)) |
308bfcab |
313 | (defgeneric allocate-foreign (object &key &allow-other-keys)) |
9adccb27 |
314 | |
c0e19882 |
315 | (defun foreign-location (instance) |
316 | (slot-value instance 'location)) |
317 | |
318 | (defun (setf foreign-location) (location instance) |
319 | (setf (slot-value instance 'location) location)) |
320 | |
321 | (defun proxy-valid-p (instance) |
322 | (slot-boundp instance 'location)) |
323 | |
3b167652 |
324 | (defmethod reference-foreign ((name symbol) location) |
325 | (reference-foreign (find-class name) location)) |
326 | |
327 | (defmethod unreference-foreign ((name symbol) location) |
328 | (unreference-foreign (find-class name) location)) |
329 | |
9adccb27 |
330 | (defmethod unreference-foreign :around ((class class) location) |
331 | (unless (null-pointer-p location) |
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332 | (call-next-method))) |
94f15c3c |
333 | |
0f134a29 |
334 | (defmethod print-object ((instance proxy) stream) |
335 | (print-unreadable-object (instance stream :type t :identity nil) |
09f6e237 |
336 | (if (slot-boundp instance 'location) |
337 | (format stream "at 0x~X" (sap-int (foreign-location instance))) |
338 | (write-string "at \"unbound\"" stream)))) |
94f15c3c |
339 | |
308bfcab |
340 | (defmethod initialize-instance :around ((instance proxy) &rest initargs &key &allow-other-keys) |
341 | (setf |
342 | (foreign-location instance) |
343 | (apply #'allocate-foreign instance initargs)) |
8958fa4a |
344 | (prog1 |
345 | (call-next-method) |
346 | (cache-instance instance) |
347 | (finalize instance (instance-finalizer instance)))) |
94f15c3c |
348 | |
349 | (defmethod instance-finalizer ((instance proxy)) |
09f6e237 |
350 | (let ((location (foreign-location instance)) |
9adccb27 |
351 | (class (class-of instance))) |
352 | ;; (unless (find-method #'unreference-foreign nil (list (class-of class) t) nil) |
353 | ;; (error "No matching method for UNREFERENCE-INSTANCE when called with class ~A" class)) |
354 | #'(lambda () |
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355 | (remove-cached-instance location) |
9adccb27 |
356 | (unreference-foreign class location)))) |
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357 | |
ca01de1b |
358 | ;; Any reference to the foreign object the instance may have held |
359 | ;; should be released before this method is invoked |
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360 | (defmethod invalidate-instance ((instance proxy)) |
361 | (remove-cached-instance (foreign-location instance)) |
ca01de1b |
362 | (slot-makunbound instance 'location) |
363 | (cancel-finalization instance) |
364 | (cache-invalidated-instance instance)) |
4a64c16d |
365 | |
94f15c3c |
366 | |
367 | ;;;; Metaclass used for subclasses of proxy |
368 | |
73572c12 |
369 | (defgeneric most-specific-proxy-superclass (class)) |
370 | (defgeneric direct-proxy-superclass (class)) |
371 | |
372 | |
94f15c3c |
373 | (eval-when (:compile-toplevel :load-toplevel :execute) |
9adccb27 |
374 | (defclass proxy-class (virtual-slots-class) |
09f6e237 |
375 | ((size :reader foreign-size))) |
94f15c3c |
376 | |
377 | (defclass direct-alien-slot-definition (direct-virtual-slot-definition) |
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378 | ((offset :reader slot-definition-offset :initarg :offset)) |
379 | (:default-initargs :allocation :alien)) |
94f15c3c |
380 | |
381 | (defclass effective-alien-slot-definition (effective-virtual-slot-definition) |
4d83a8a6 |
382 | ((offset :reader slot-definition-offset :initarg :offset))) |
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383 | |
94f15c3c |
384 | (defmethod most-specific-proxy-superclass ((class proxy-class)) |
385 | (find-if |
386 | #'(lambda (class) |
387 | (subtypep (class-name class) 'proxy)) |
4d83a8a6 |
388 | (cdr (compute-class-precedence-list class)))) |
73572c12 |
389 | |
12d0437e |
390 | (defmethod direct-proxy-superclass ((class proxy-class)) |
391 | (find-if |
392 | #'(lambda (class) |
393 | (subtypep (class-name class) 'proxy)) |
4d83a8a6 |
394 | (class-direct-superclasses class))) |
395 | |
eeda1c2d |
396 | (defmethod shared-initialize ((class proxy-class) names &key size) |
94f15c3c |
397 | (call-next-method) |
12d0437e |
398 | (cond |
4d83a8a6 |
399 | (size (setf (slot-value class 'size) (first size))) |
9adccb27 |
400 | ((slot-boundp class 'size) (slot-makunbound class 'size)))) |
09f6e237 |
401 | |
4d83a8a6 |
402 | (defmethod direct-slot-definition-class ((class proxy-class) &rest initargs) |
94f15c3c |
403 | (case (getf initargs :allocation) |
e2ebafb1 |
404 | (:alien (find-class 'direct-alien-slot-definition)) |
94f15c3c |
405 | (t (call-next-method)))) |
4d83a8a6 |
406 | |
407 | (defmethod effective-slot-definition-class ((class proxy-class) &rest initargs) |
94f15c3c |
408 | (case (getf initargs :allocation) |
409 | (:alien (find-class 'effective-alien-slot-definition)) |
94f15c3c |
410 | (t (call-next-method)))) |
411 | |
4d83a8a6 |
412 | |
413 | (defmethod compute-effective-slot-definition-initargs ((class proxy-class) direct-slotds) |
b19bbc94 |
414 | (if (eq (slot-definition-allocation (first direct-slotds)) :alien) |
4d83a8a6 |
415 | (nconc |
416 | (list :offset (most-specific-slot-value direct-slotds 'offset)) |
417 | (call-next-method)) |
418 | (call-next-method))) |
419 | |
420 | |
421 | (defmethod initialize-internal-slot-functions ((slotd effective-alien-slot-definition)) |
422 | (with-slots (offset) slotd |
9adccb27 |
423 | (let ((type (slot-definition-type slotd))) |
eeda1c2d |
424 | (unless (slot-boundp slotd 'getter) |
9adccb27 |
425 | (let ((reader (reader-function type))) |
426 | (setf |
eeda1c2d |
427 | (slot-value slotd 'getter) |
9adccb27 |
428 | #'(lambda (object) |
09f6e237 |
429 | (funcall reader (foreign-location object) offset))))) |
4d83a8a6 |
430 | |
eeda1c2d |
431 | (unless (slot-boundp slotd 'setter) |
9adccb27 |
432 | (let ((writer (writer-function type)) |
433 | (destroy (destroy-function type))) |
434 | (setf |
eeda1c2d |
435 | (slot-value slotd 'setter) |
9adccb27 |
436 | #'(lambda (value object) |
09f6e237 |
437 | (let ((location (foreign-location object))) |
9adccb27 |
438 | (funcall destroy location offset) ; destroy old value |
eeda1c2d |
439 | (funcall writer value location offset)))))))) |
440 | |
4d83a8a6 |
441 | (call-next-method)) |
442 | |
4d83a8a6 |
443 | ;; TODO: call some C code to detect this a compile time |
444 | (defconstant +struct-alignmen+ 4) |
94f15c3c |
445 | |
09f6e237 |
446 | (defun align-offset (size) |
447 | (if (zerop (mod size +struct-alignmen+)) |
448 | size |
449 | (+ size (- +struct-alignmen+ (mod size +struct-alignmen+))))) |
450 | |
94f15c3c |
451 | (defmethod compute-slots ((class proxy-class)) |
09f6e237 |
452 | (let ((alien-slots |
453 | (remove-if-not |
454 | #'(lambda (slotd) |
455 | (eq (slot-definition-allocation slotd) :alien)) |
456 | (class-direct-slots class)))) |
457 | (when alien-slots |
458 | (loop |
459 | as offset = (align-offset (foreign-size |
460 | (most-specific-proxy-superclass class))) |
461 | then (align-offset |
462 | (+ |
463 | (slot-definition-offset slotd) |
464 | (size-of (slot-definition-type slotd)))) |
465 | for slotd in alien-slots |
466 | unless (slot-boundp slotd 'offset) |
467 | do (setf (slot-value slotd 'offset) offset)))) |
94f15c3c |
468 | (call-next-method)) |
3e15002d |
469 | |
4d83a8a6 |
470 | (defmethod validate-superclass ((class proxy-class) (super standard-class)) |
471 | (subtypep (class-name super) 'proxy)) |
472 | |
09f6e237 |
473 | (defmethod foreign-size ((class-name symbol)) |
474 | (foreign-size (find-class class-name)))) |
47a11c16 |
475 | |
09f6e237 |
476 | (defmethod foreign-size ((object proxy)) |
477 | (foreign-size (class-of object))) |
4d83a8a6 |
478 | |
09f6e237 |
479 | |
9adccb27 |
480 | (defmethod alien-type ((class proxy-class) &rest args) |
481 | (declare (ignore class args)) |
482 | (alien-type 'pointer)) |
483 | |
484 | (defmethod size-of ((class proxy-class) &rest args) |
485 | (declare (ignore class args)) |
486 | (size-of 'pointer)) |
487 | |
488 | (defmethod from-alien-form (location (class proxy-class) &rest args) |
489 | (declare (ignore args)) |
490 | `(ensure-proxy-instance ',(class-name class) ,location)) |
491 | |
492 | (defmethod from-alien-function ((class proxy-class) &rest args) |
493 | (declare (ignore args)) |
494 | #'(lambda (location) |
495 | (ensure-proxy-instance class location))) |
94f15c3c |
496 | |
9adccb27 |
497 | (defmethod to-alien-form (instance (class proxy-class) &rest args) |
498 | (declare (ignore class args)) |
09f6e237 |
499 | `(foreign-location ,instance)) |
94f15c3c |
500 | |
9adccb27 |
501 | (defmethod to-alien-function ((class proxy-class) &rest args) |
502 | (declare (ignore class args)) |
09f6e237 |
503 | #'foreign-location) |
9adccb27 |
504 | |
9ca5565a |
505 | (defmethod copy-from-alien-form (location (class proxy-class) &rest args) |
506 | (declare (ignore args)) |
507 | (let ((class-name (class-name class))) |
508 | `(ensure-proxy-instance ',class-name |
509 | (reference-foreign ',class-name ,location)))) |
510 | |
511 | (defmethod copy-from-alien-function ((class proxy-class) &rest args) |
512 | (declare (ignore args)) |
513 | #'(lambda (location) |
514 | (ensure-proxy-instance class (reference-foreign class location)))) |
515 | |
516 | (defmethod copy-to-alien-form (instance (class proxy-class) &rest args) |
517 | (declare (ignore args)) |
09f6e237 |
518 | `(reference-foreign ',(class-name class) (foreign-location ,instance))) |
9ca5565a |
519 | |
520 | (defmethod copy-to-alien-function ((class proxy-class) &rest args) |
73572c12 |
521 | (declare (ignore args)) |
9ca5565a |
522 | #'(lambda (instance) |
09f6e237 |
523 | (reference-foreign class (foreign-location instance)))) |
9ca5565a |
524 | |
9adccb27 |
525 | (defmethod writer-function ((class proxy-class) &rest args) |
526 | (declare (ignore args)) |
527 | #'(lambda (instance location &optional (offset 0)) |
528 | (assert (null-pointer-p (sap-ref-sap location offset))) |
529 | (setf |
530 | (sap-ref-sap location offset) |
09f6e237 |
531 | (reference-foreign class (foreign-location instance))))) |
94f15c3c |
532 | |
9adccb27 |
533 | (defmethod reader-function ((class proxy-class) &rest args) |
534 | (declare (ignore args)) |
3005806e |
535 | #'(lambda (location &optional (offset 0) weak-p) |
536 | (declare (ignore weak-p)) |
9ca5565a |
537 | (let ((instance (sap-ref-sap location offset))) |
538 | (unless (null-pointer-p instance) |
539 | (ensure-proxy-instance class (reference-foreign class instance)))))) |
94f15c3c |
540 | |
9adccb27 |
541 | (defmethod destroy-function ((class proxy-class) &rest args) |
542 | (declare (ignore args)) |
543 | #'(lambda (location &optional (offset 0)) |
544 | (unreference-foreign class (sap-ref-sap location offset)))) |
545 | |
12b7df04 |
546 | (defmethod unbound-value ((class proxy-class) &rest args) |
47a11c16 |
547 | (declare (ignore args)) |
12b7df04 |
548 | (values t nil)) |
9adccb27 |
549 | |
8958fa4a |
550 | (defun ensure-proxy-instance (class location &rest initargs) |
551 | "Returns a proxy object representing the foreign object at the give |
552 | location. If an existing object is not found in the cache |
553 | MAKE-PROXY-INSTANCE is called to create one." |
9adccb27 |
554 | (unless (null-pointer-p location) |
555 | (or |
aaced14e |
556 | #-debug-ref-counting(find-cached-instance location) |
557 | #+debug-ref-counting |
4a64c16d |
558 | (let ((instance (find-cached-instance location))) |
559 | (when instance |
560 | (format t "Object found in cache: ~A~%" instance) |
561 | instance)) |
8958fa4a |
562 | (let ((instance (apply #'make-proxy-instance class location initargs))) |
563 | (cache-instance instance) |
564 | instance)))) |
565 | |
566 | (defgeneric make-proxy-instance (class location &key weak) |
567 | (:documentation "Creates a new proxy object representing the foreign |
568 | object at the give location. If WEAK is non NIL the foreign memory |
569 | will not be released when the proxy is garbage collected.")) |
570 | |
4a64c16d |
571 | (defmethod make-proxy-instance ((class symbol) location &rest initargs) |
572 | (apply #'make-proxy-instance (find-class class) location initargs)) |
8958fa4a |
573 | |
574 | (defmethod make-proxy-instance ((class proxy-class) location &key weak) |
ca01de1b |
575 | (let ((instance |
576 | (or |
577 | (find-invalidated-instance class) |
578 | (allocate-instance class)))) |
c0e19882 |
579 | (setf (foreign-location instance) location) |
8958fa4a |
580 | (unless weak |
581 | (finalize instance (instance-finalizer instance))) |
582 | instance)) |
94f15c3c |
583 | |
12d0437e |
584 | |
585 | ;;;; Superclasses for wrapping of C structures |
94f15c3c |
586 | |
9adccb27 |
587 | (defclass struct (proxy) |
588 | () |
09f6e237 |
589 | (:metaclass proxy-class) |
590 | (:size 0)) |
94f15c3c |
591 | |
308bfcab |
592 | (defmethod allocate-foreign ((struct struct) &rest initargs) |
94f15c3c |
593 | (declare (ignore initargs)) |
308bfcab |
594 | (let ((size (foreign-size (class-of struct)))) |
595 | (if (zerop size) |
596 | (error "~A has zero size" (class-of struct)) |
597 | (allocate-memory size)))) |
94f15c3c |
598 | |
599 | |
9adccb27 |
600 | ;;;; Metaclasses used for subclasses of struct |
601 | |
602 | (defclass struct-class (proxy-class) |
603 | ()) |
94f15c3c |
604 | |
e2ebafb1 |
605 | (defmethod direct-slot-definition-class ((class struct-class) &rest initargs) |
606 | (if (not (getf initargs :allocation)) |
607 | (find-class 'direct-alien-slot-definition) |
608 | (call-next-method))) |
609 | |
9adccb27 |
610 | (defmethod reference-foreign ((class struct-class) location) |
09f6e237 |
611 | (copy-memory location (foreign-size class))) |
9adccb27 |
612 | |
613 | (defmethod unreference-foreign ((class struct-class) location) |
12d0437e |
614 | (deallocate-memory location)) |
94f15c3c |
615 | |
65466e9c |
616 | (defmethod compute-slots :around ((class struct-class)) |
617 | (let ((slots (call-next-method))) |
618 | (when (and |
b19bbc94 |
619 | #-sbcl>=0.9.8(class-finalized-p class) |
65466e9c |
620 | (not (slot-boundp class 'size))) |
621 | (let ((size (loop |
622 | for slotd in slots |
623 | when (eq (slot-definition-allocation slotd) :alien) |
624 | maximize (+ |
625 | (slot-definition-offset slotd) |
626 | (size-of (slot-definition-type slotd)))))) |
627 | (setf (slot-value class 'size) (+ size (mod size +struct-alignmen+))))) |
628 | slots)) |
09f6e237 |
629 | |
3005806e |
630 | (defmethod reader-function ((class struct-class) &rest args) |
4a64c16d |
631 | (declare (ignore args)) |
3005806e |
632 | #'(lambda (location &optional (offset 0) weak-p) |
4a64c16d |
633 | (let ((instance (sap-ref-sap location offset))) |
634 | (unless (null-pointer-p instance) |
3005806e |
635 | (if weak-p |
636 | (ensure-proxy-instance class instance :weak t) |
637 | (ensure-proxy-instance class (reference-foreign class instance))))))) |
4a64c16d |
638 | |
94f15c3c |
639 | |
9adccb27 |
640 | (defclass static-struct-class (struct-class) |
641 | ()) |
94f15c3c |
642 | |
9adccb27 |
643 | (defmethod reference-foreign ((class static-struct-class) location) |
644 | (declare (ignore class)) |
12d0437e |
645 | location) |
94f15c3c |
646 | |
9adccb27 |
647 | (defmethod unreference-foreign ((class static-struct-class) location) |
648 | (declare (ignore class location)) |
12d0437e |
649 | nil) |
bde0b906 |
650 | |
3005806e |
651 | (defmethod reader-function ((class struct-class) &rest args) |
652 | (declare (ignore args)) |
653 | #'(lambda (location &optional (offset 0) weak-p) |
654 | (declare (ignore weak-p)) |
655 | (let ((instance (sap-ref-sap location offset))) |
656 | (unless (null-pointer-p instance) |
657 | (ensure-proxy-instance class instance :weak t))))) |
658 | |
bde0b906 |
659 | |
660 | ;;; Pseudo type for structs which are inlined in other objects |
661 | |
662 | (defmethod size-of ((type (eql 'inlined)) &rest args) |
663 | (declare (ignore type)) |
09f6e237 |
664 | (foreign-size (first args))) |
bde0b906 |
665 | |
666 | (defmethod reader-function ((type (eql 'inlined)) &rest args) |
667 | (declare (ignore type)) |
668 | (destructuring-bind (class) args |
3005806e |
669 | #'(lambda (location &optional (offset 0) weak-p) |
670 | (declare (ignore weak-p)) |
bde0b906 |
671 | (ensure-proxy-instance class |
672 | (reference-foreign class (sap+ location offset)))))) |
673 | |
4a64c16d |
674 | (defmethod writer-function ((type (eql 'inlined)) &rest args) |
675 | (declare (ignore type)) |
676 | (destructuring-bind (class) args |
677 | #'(lambda (instance location &optional (offset 0)) |
678 | (copy-memory (foreign-location instance) (foreign-size class) (sap+ location offset))))) |
679 | |
bde0b906 |
680 | (defmethod destroy-function ((type (eql 'inlined)) &rest args) |
681 | (declare (ignore args)) |
682 | #'(lambda (location &optional (offset 0)) |
683 | (declare (ignore location offset)))) |
684 | |
685 | (export 'inlined) |