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88e17b57 | 1 | /* GNU Objective C Runtime initialization |
fed2b101 | 2 | Copyright (C) 1993, 1995, 1996, 1997, 2002, 2009, 2010 |
748086b7 | 3 | Free Software Foundation, Inc. |
88e17b57 BE |
4 | Contributed by Kresten Krab Thorup |
5 | +load support contributed by Ovidiu Predescu <ovidiu@net-community.com> | |
6 | ||
38709cad | 7 | This file is part of GCC. |
88e17b57 | 8 | |
38709cad | 9 | GCC is free software; you can redistribute it and/or modify it under the |
88e17b57 | 10 | terms of the GNU General Public License as published by the Free Software |
748086b7 | 11 | Foundation; either version 3, or (at your option) any later version. |
88e17b57 | 12 | |
38709cad | 13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
88e17b57 BE |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
15 | FOR A PARTICULAR PURPOSE. See the GNU General Public License for more | |
16 | details. | |
17 | ||
748086b7 JJ |
18 | Under Section 7 of GPL version 3, you are granted additional |
19 | permissions described in the GCC Runtime Library Exception, version | |
20 | 3.1, as published by the Free Software Foundation. | |
88e17b57 | 21 | |
748086b7 JJ |
22 | You should have received a copy of the GNU General Public License and |
23 | a copy of the GCC Runtime Library Exception along with this program; | |
24 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
25 | <http://www.gnu.org/licenses/>. */ | |
88e17b57 | 26 | |
e99776d8 NP |
27 | /* Uncommented the following line to enable debug logging. Use this |
28 | only while debugging the runtime. */ | |
29 | /* #define DEBUG 1 */ | |
30 | ||
6dead247 | 31 | #include "objc-private/common.h" |
7b869986 | 32 | #include "objc-private/error.h" |
fed2b101 | 33 | #include "objc/runtime.h" |
a19fac96 | 34 | #include "objc/thr.h" |
5be9cdc1 NP |
35 | #include "objc-private/hash.h" |
36 | #include "objc-private/objc-list.h" | |
fed2b101 | 37 | #include "objc-private/module-abi-8.h" |
41720477 | 38 | #include "objc-private/runtime.h" /* For __objc_resolve_class_links(). */ |
1af5b8f5 | 39 | #include "objc-private/selector.h" /* For __sel_register_typed_name(). */ |
fd312537 | 40 | #include "objc-private/objc-sync.h" /* For __objc_sync_init() */ |
f7185d47 NP |
41 | #include "objc-private/protocols.h" /* For __objc_protocols_init(), |
42 | __objc_protocols_add_protocol() | |
43 | __objc_protocols_register_selectors() */ | |
682e805a | 44 | #include "objc-private/accessors.h" /* For __objc_accessors_init() */ |
88e17b57 | 45 | |
575584a9 | 46 | /* The version number of this runtime. This must match the number |
40165636 | 47 | defined in gcc (objc-act.c). */ |
88e17b57 BE |
48 | #define OBJC_VERSION 8 |
49 | #define PROTOCOL_VERSION 2 | |
50 | ||
c07499dc | 51 | /* This list contains modules currently loaded into the runtime and |
1588200e NP |
52 | for which the +load method (and the load callback, if any) has not |
53 | been called yet. */ | |
40165636 | 54 | static struct objc_list *__objc_module_list = 0; /* !T:MUTEX */ |
88e17b57 | 55 | |
575584a9 NP |
56 | /* This list contains all proto_list's not yet assigned class |
57 | links. */ | |
40165636 | 58 | static struct objc_list *unclaimed_proto_list = 0; /* !T:MUTEX */ |
88e17b57 BE |
59 | |
60 | /* List of unresolved static instances. */ | |
61 | static struct objc_list *uninitialized_statics = 0; /* !T:MUTEX */ | |
62 | ||
0bfe3fa1 NP |
63 | /* List of duplicated classes found while loading modules. If we find |
64 | a class twice, we ignore it the second time. On some platforms, | |
65 | where the order in which modules are loaded is well defined, this | |
66 | allows you to replace a class in a shared library by linking in a | |
67 | new implementation which is loaded in in the right order, and which | |
68 | overrides the existing one. | |
69 | ||
70 | Protected by __objc_runtime_mutex. */ | |
71 | static cache_ptr duplicate_classes = NULL; | |
72 | ||
debfbfee NP |
73 | /* Global runtime "write" mutex. Having a single mutex prevents |
74 | deadlocks, but reduces concurrency. To improve concurrency, some | |
75 | groups of functions in the runtime have their own separate mutex | |
76 | (eg, __class_table_lock in class.c); to avoid deadlocks, these | |
77 | routines must make sure that they never acquire any other lock | |
78 | while holding their own local lock. Ie, they should lock, execute | |
79 | some C code that does not perform any calls to other runtime | |
80 | functions which may potentially lock different locks, then unlock. | |
81 | If they need to perform any calls to other runtime functions that | |
82 | may potentially lock other locks, then they should use the global | |
83 | __objc_runtime_mutex. */ | |
88e17b57 BE |
84 | objc_mutex_t __objc_runtime_mutex = 0; |
85 | ||
40165636 | 86 | /* Number of threads that are alive. */ |
88e17b57 BE |
87 | int __objc_runtime_threads_alive = 1; /* !T:MUTEX */ |
88 | ||
40165636 | 89 | /* Check compiler vs runtime version. */ |
fed2b101 | 90 | static void init_check_module_version (struct objc_module *); |
88e17b57 | 91 | |
40165636 RB |
92 | /* Assign isa links to protos. */ |
93 | static void __objc_init_protocols (struct objc_protocol_list *protos); | |
88e17b57 | 94 | |
f7185d47 NP |
95 | /* Assign isa link to a protocol, and register it. */ |
96 | static void __objc_init_protocol (struct objc_protocol *protocol); | |
97 | ||
40165636 RB |
98 | /* Add protocol to class. */ |
99 | static void __objc_class_add_protocols (Class, struct objc_protocol_list *); | |
88e17b57 | 100 | |
120d5f8e | 101 | /* Load callback hook. */ |
1588200e | 102 | void (*_objc_load_callback) (Class class, struct objc_category *category) = 0; /* !T:SAFE */ |
88e17b57 | 103 | |
0bfe3fa1 | 104 | /* Are all categories/classes resolved ? */ |
88e17b57 BE |
105 | BOOL __objc_dangling_categories = NO; /* !T:UNUSED */ |
106 | ||
575584a9 NP |
107 | /* Sends +load to all classes and categories in certain |
108 | situations. */ | |
88e17b57 BE |
109 | static void objc_send_load (void); |
110 | ||
111 | /* Inserts all the classes defined in module in a tree of classes that | |
fa539f51 | 112 | resembles the class hierarchy. This tree is traversed in preorder |
40165636 | 113 | and the classes in its nodes receive the +load message if these |
fa539f51 | 114 | methods were not executed before. The algorithm ensures that when |
40165636 RB |
115 | the +load method of a class is executed all the superclasses have |
116 | been already received the +load message. */ | |
fed2b101 | 117 | static void __objc_create_classes_tree (struct objc_module *module); |
88e17b57 | 118 | |
1588200e NP |
119 | /* Calls the _objc_load_callback for each class and category in the |
120 | module (if _objc_load_callback is not NULL). */ | |
121 | static void __objc_call_load_callback (struct objc_module *module); | |
88e17b57 BE |
122 | |
123 | /* A special version that works only before the classes are completely | |
40165636 | 124 | installed in the runtime. */ |
88e17b57 BE |
125 | static BOOL class_is_subclass_of_class (Class class, Class superclass); |
126 | ||
fa539f51 NP |
127 | /* This is a node in the class tree hierarchy used to send +load |
128 | messages. */ | |
0bfe3fa1 NP |
129 | typedef struct objc_class_tree |
130 | { | |
fa539f51 | 131 | /* The class corresponding to the node. */ |
88e17b57 | 132 | Class class; |
fa539f51 NP |
133 | |
134 | /* This is a linked list of all the direct subclasses of this class. | |
135 | 'head' points to a subclass node; 'tail' points to the next | |
136 | objc_list node (whose 'head' points to another subclass node, | |
137 | etc). */ | |
138 | struct objc_list *subclasses; | |
88e17b57 BE |
139 | } objc_class_tree; |
140 | ||
fa539f51 NP |
141 | /* This is a linked list of objc_class_tree trees. The head of these |
142 | trees are root classes (their super class is Nil). These different | |
40165636 | 143 | trees represent different class hierarchies. */ |
88e17b57 BE |
144 | static struct objc_list *__objc_class_tree_list = NULL; |
145 | ||
40165636 RB |
146 | /* Keeps the +load methods who have been already executed. This hash |
147 | should not be destroyed during the execution of the program. */ | |
88e17b57 BE |
148 | static cache_ptr __objc_load_methods = NULL; |
149 | ||
e083f3f9 RFM |
150 | /* This function is used when building the class tree used to send |
151 | ordinately the +load message to all classes needing it. The tree | |
152 | is really needed so that superclasses will get the message before | |
153 | subclasses. | |
154 | ||
fa539f51 | 155 | This tree may contain classes which are being loaded (or have just |
e083f3f9 RFM |
156 | being loaded), and whose super_class pointers have not yet been |
157 | resolved. This implies that their super_class pointers point to a | |
158 | string with the name of the superclass; when the first message is | |
159 | sent to the class (/an object of that class) the class links will | |
160 | be resolved, which will replace the super_class pointers with | |
161 | pointers to the actual superclasses. | |
162 | ||
163 | Unfortunately, the tree might also contain classes which had been | |
164 | loaded previously, and whose class links have already been | |
165 | resolved. | |
166 | ||
167 | This function returns the superclass of a class in both cases, and | |
168 | can be used to build the determine the class relationships while | |
575584a9 | 169 | building the tree. */ |
e083f3f9 RFM |
170 | static Class class_superclass_of_class (Class class) |
171 | { | |
172 | char *super_class_name; | |
173 | ||
174 | /* If the class links have been resolved, use the resolved | |
575584a9 | 175 | links. */ |
e083f3f9 RFM |
176 | if (CLS_ISRESOLV (class)) |
177 | return class->super_class; | |
178 | ||
179 | /* Else, 'class' has not yet been resolved. This means that its | |
575584a9 NP |
180 | super_class pointer is really the name of the super class (rather |
181 | than a pointer to the actual superclass). */ | |
e083f3f9 RFM |
182 | super_class_name = (char *)class->super_class; |
183 | ||
184 | /* Return Nil for a root class. */ | |
185 | if (super_class_name == NULL) | |
186 | return Nil; | |
187 | ||
188 | /* Lookup the superclass of non-root classes. */ | |
fed2b101 | 189 | return objc_getClass (super_class_name); |
e083f3f9 RFM |
190 | } |
191 | ||
192 | ||
40165636 | 193 | /* Creates a tree of classes whose topmost class is directly inherited |
fa539f51 NP |
194 | from `upper' and the bottom class in this tree is `bottom_class'. |
195 | If `upper' is Nil, creates a class hierarchy up to a root class. | |
196 | The classes in this tree are super classes of `bottom_class'. The | |
197 | `subclasses' member of each tree node point to the list of | |
198 | subclasses for the node. */ | |
88e17b57 BE |
199 | static objc_class_tree * |
200 | create_tree_of_subclasses_inherited_from (Class bottom_class, Class upper) | |
201 | { | |
fed2b101 | 202 | Class superclass; |
88e17b57 BE |
203 | objc_class_tree *tree, *prev; |
204 | ||
205 | DEBUG_PRINTF ("create_tree_of_subclasses_inherited_from:"); | |
e99776d8 | 206 | DEBUG_PRINTF (" bottom_class = %s, upper = %s\n", |
88e17b57 BE |
207 | (bottom_class ? bottom_class->name : NULL), |
208 | (upper ? upper->name : NULL)); | |
209 | ||
fa539f51 NP |
210 | superclass = class_superclass_of_class (bottom_class); |
211 | ||
212 | prev = objc_calloc (1, sizeof (objc_class_tree)); | |
88e17b57 BE |
213 | prev->class = bottom_class; |
214 | ||
fa539f51 NP |
215 | if (superclass == upper) |
216 | return prev; | |
217 | ||
88e17b57 BE |
218 | while (superclass != upper) |
219 | { | |
220 | tree = objc_calloc (1, sizeof (objc_class_tree)); | |
221 | tree->class = superclass; | |
222 | tree->subclasses = list_cons (prev, tree->subclasses); | |
e083f3f9 | 223 | superclass = class_superclass_of_class (superclass); |
88e17b57 BE |
224 | prev = tree; |
225 | } | |
226 | ||
227 | return tree; | |
228 | } | |
229 | ||
40165636 | 230 | /* Insert the `class' into the proper place in the `tree' class |
fa539f51 | 231 | hierarchy. This function returns a new tree if the class has been |
40165636 | 232 | successfully inserted into the tree or NULL if the class is not |
fa539f51 NP |
233 | part of the classes hierarchy described by `tree'. This function |
234 | is private to objc_tree_insert_class (), you should not call it | |
40165636 | 235 | directly. */ |
88e17b57 BE |
236 | static objc_class_tree * |
237 | __objc_tree_insert_class (objc_class_tree *tree, Class class) | |
238 | { | |
fa539f51 NP |
239 | DEBUG_PRINTF ("__objc_tree_insert_class: tree = %p (root: %s), class = %s\n", |
240 | tree, ((tree && tree->class) ? tree->class->name : "Nil"), class->name); | |
88e17b57 BE |
241 | |
242 | if (tree == NULL) | |
243 | return create_tree_of_subclasses_inherited_from (class, NULL); | |
244 | else if (class == tree->class) | |
245 | { | |
575584a9 | 246 | /* `class' has been already inserted. */ |
e99776d8 | 247 | DEBUG_PRINTF (" 1. class %s was previously inserted\n", class->name); |
88e17b57 BE |
248 | return tree; |
249 | } | |
e083f3f9 | 250 | else if (class_superclass_of_class (class) == tree->class) |
88e17b57 | 251 | { |
575584a9 NP |
252 | /* If class is a direct subclass of tree->class then add class |
253 | to the list of subclasses. First check to see if it wasn't | |
254 | already inserted. */ | |
88e17b57 BE |
255 | struct objc_list *list = tree->subclasses; |
256 | objc_class_tree *node; | |
257 | ||
258 | while (list) | |
259 | { | |
260 | /* Class has been already inserted; do nothing just return | |
40165636 RB |
261 | the tree. */ |
262 | if (((objc_class_tree *) list->head)->class == class) | |
88e17b57 | 263 | { |
e99776d8 | 264 | DEBUG_PRINTF (" 2. class %s was previously inserted\n", |
88e17b57 BE |
265 | class->name); |
266 | return tree; | |
267 | } | |
268 | list = list->tail; | |
269 | } | |
270 | ||
575584a9 NP |
271 | /* Create a new node class and insert it into the list of |
272 | subclasses. */ | |
88e17b57 BE |
273 | node = objc_calloc (1, sizeof (objc_class_tree)); |
274 | node->class = class; | |
275 | tree->subclasses = list_cons (node, tree->subclasses); | |
e99776d8 | 276 | DEBUG_PRINTF (" 3. class %s inserted\n", class->name); |
88e17b57 BE |
277 | return tree; |
278 | } | |
279 | else | |
280 | { | |
575584a9 NP |
281 | /* The class is not a direct subclass of tree->class. Search |
282 | for class's superclasses in the list of subclasses. */ | |
88e17b57 BE |
283 | struct objc_list *subclasses = tree->subclasses; |
284 | ||
40165636 RB |
285 | /* Precondition: the class must be a subclass of tree->class; |
286 | otherwise return NULL to indicate our caller that it must | |
287 | take the next tree. */ | |
288 | if (! class_is_subclass_of_class (class, tree->class)) | |
88e17b57 BE |
289 | return NULL; |
290 | ||
291 | for (; subclasses != NULL; subclasses = subclasses->tail) | |
292 | { | |
40165636 | 293 | Class aClass = ((objc_class_tree *) (subclasses->head))->class; |
88e17b57 BE |
294 | |
295 | if (class_is_subclass_of_class (class, aClass)) | |
296 | { | |
40165636 RB |
297 | /* If we found one of class's superclasses we insert the |
298 | class into its subtree and return the original tree | |
299 | since nothing has been changed. */ | |
88e17b57 BE |
300 | subclasses->head |
301 | = __objc_tree_insert_class (subclasses->head, class); | |
e99776d8 | 302 | DEBUG_PRINTF (" 4. class %s inserted\n", class->name); |
88e17b57 BE |
303 | return tree; |
304 | } | |
305 | } | |
306 | ||
40165636 RB |
307 | /* We haven't found a subclass of `class' in the `subclasses' |
308 | list. Create a new tree of classes whose topmost class is a | |
309 | direct subclass of tree->class. */ | |
88e17b57 BE |
310 | { |
311 | objc_class_tree *new_tree | |
40165636 | 312 | = create_tree_of_subclasses_inherited_from (class, tree->class); |
88e17b57 | 313 | tree->subclasses = list_cons (new_tree, tree->subclasses); |
e99776d8 | 314 | DEBUG_PRINTF (" 5. class %s inserted\n", class->name); |
88e17b57 BE |
315 | return tree; |
316 | } | |
317 | } | |
318 | } | |
319 | ||
40165636 | 320 | /* This function inserts `class' in the right tree hierarchy classes. */ |
88e17b57 BE |
321 | static void |
322 | objc_tree_insert_class (Class class) | |
323 | { | |
324 | struct objc_list *list_node; | |
325 | objc_class_tree *tree; | |
fa539f51 | 326 | |
88e17b57 BE |
327 | list_node = __objc_class_tree_list; |
328 | while (list_node) | |
329 | { | |
fa539f51 | 330 | /* Try to insert the class in this class hierarchy. */ |
88e17b57 BE |
331 | tree = __objc_tree_insert_class (list_node->head, class); |
332 | if (tree) | |
333 | { | |
334 | list_node->head = tree; | |
fa539f51 | 335 | return; |
88e17b57 BE |
336 | } |
337 | else | |
338 | list_node = list_node->tail; | |
339 | } | |
fa539f51 NP |
340 | |
341 | /* If the list was finished but the class hasn't been inserted, we | |
342 | don't have an existing class hierarchy that can accomodate it. | |
343 | Create a new one. */ | |
344 | __objc_class_tree_list = list_cons (NULL, __objc_class_tree_list); | |
345 | __objc_class_tree_list->head = __objc_tree_insert_class (NULL, class); | |
88e17b57 BE |
346 | } |
347 | ||
40165636 | 348 | /* Traverse tree in preorder. Used to send +load. */ |
88e17b57 BE |
349 | static void |
350 | objc_preorder_traverse (objc_class_tree *tree, | |
351 | int level, | |
40165636 | 352 | void (*function) (objc_class_tree *, int)) |
88e17b57 BE |
353 | { |
354 | struct objc_list *node; | |
355 | ||
356 | (*function) (tree, level); | |
357 | for (node = tree->subclasses; node; node = node->tail) | |
358 | objc_preorder_traverse (node->head, level + 1, function); | |
359 | } | |
360 | ||
40165636 | 361 | /* Traverse tree in postorder. Used to destroy a tree. */ |
88e17b57 BE |
362 | static void |
363 | objc_postorder_traverse (objc_class_tree *tree, | |
40165636 RB |
364 | int level, |
365 | void (*function) (objc_class_tree *, int)) | |
88e17b57 BE |
366 | { |
367 | struct objc_list *node; | |
368 | ||
369 | for (node = tree->subclasses; node; node = node->tail) | |
370 | objc_postorder_traverse (node->head, level + 1, function); | |
371 | (*function) (tree, level); | |
372 | } | |
373 | ||
40165636 | 374 | /* Used to print a tree class hierarchy. */ |
88e17b57 BE |
375 | #ifdef DEBUG |
376 | static void | |
377 | __objc_tree_print (objc_class_tree *tree, int level) | |
378 | { | |
379 | int i; | |
380 | ||
381 | for (i = 0; i < level; i++) | |
382 | printf (" "); | |
383 | printf ("%s\n", tree->class->name); | |
384 | } | |
385 | #endif | |
386 | ||
40165636 | 387 | /* Walks on a linked list of methods in the reverse order and executes |
c07499dc NP |
388 | all the methods corresponding to the `+load' selector. Walking in |
389 | the reverse order assures the +load of class is executed first and | |
390 | then +load of categories because of the way in which categories are | |
391 | added to the class methods. This function needs to be called with | |
392 | the objc_runtime_mutex locked. */ | |
88e17b57 | 393 | static void |
c07499dc | 394 | __objc_send_load_using_method_list (struct objc_method_list *method_list, Class class) |
88e17b57 | 395 | { |
c07499dc | 396 | static SEL load_selector = 0; |
88e17b57 BE |
397 | int i; |
398 | ||
c07499dc | 399 | if (!method_list) |
88e17b57 BE |
400 | return; |
401 | ||
c07499dc NP |
402 | /* This needs no lock protection because we are called with the |
403 | objc_runtime_mutex locked. */ | |
404 | if (!load_selector) | |
405 | load_selector = sel_registerName ("load"); | |
406 | ||
407 | /* method_list is a linked list of method lists; since we're | |
408 | executing in reverse order, we need to do the next list before we | |
409 | do this one. */ | |
410 | __objc_send_load_using_method_list (method_list->method_next, class); | |
88e17b57 | 411 | |
40165636 | 412 | /* Search the method list. */ |
88e17b57 BE |
413 | for (i = 0; i < method_list->method_count; i++) |
414 | { | |
fed2b101 | 415 | struct objc_method *mth = &method_list->method_list[i]; |
88e17b57 | 416 | |
c07499dc NP |
417 | /* We are searching for +load methods that we haven't executed |
418 | yet. */ | |
419 | if (mth->method_name && sel_eq (mth->method_name, load_selector) | |
270a1283 | 420 | && ! objc_hash_is_key_in_hash (__objc_load_methods, mth->method_imp)) |
88e17b57 | 421 | { |
c07499dc NP |
422 | /* Add this method into the +load hash table, so we won't |
423 | execute it again next time. */ | |
270a1283 DA |
424 | objc_hash_add (&__objc_load_methods, |
425 | mth->method_imp, | |
426 | mth->method_imp); | |
575584a9 | 427 | |
c07499dc | 428 | /* Call +load. */ |
e99776d8 | 429 | DEBUG_PRINTF (" begin of [%s +load]\n", class->name); |
e6be21fe | 430 | (*mth->method_imp) ((id)class, mth->method_name); |
e99776d8 | 431 | DEBUG_PRINTF (" end of [%s +load]\n", class->name); |
e6be21fe | 432 | |
88e17b57 BE |
433 | break; |
434 | } | |
435 | } | |
436 | } | |
437 | ||
c07499dc NP |
438 | /* This function needs to be called with the objc_runtime_mutex |
439 | locked. */ | |
88e17b57 | 440 | static void |
8f8c44cb KG |
441 | __objc_send_load (objc_class_tree *tree, |
442 | int level __attribute__ ((__unused__))) | |
88e17b57 | 443 | { |
88e17b57 | 444 | Class class = tree->class; |
fed2b101 | 445 | struct objc_method_list *method_list = class->class_pointer->methods; |
88e17b57 | 446 | |
e99776d8 | 447 | DEBUG_PRINTF ("+load: need to send load to class '%s'\n", class->name); |
c07499dc | 448 | __objc_send_load_using_method_list (method_list, class); |
88e17b57 BE |
449 | } |
450 | ||
451 | static void | |
8f8c44cb KG |
452 | __objc_destroy_class_tree_node (objc_class_tree *tree, |
453 | int level __attribute__ ((__unused__))) | |
88e17b57 BE |
454 | { |
455 | objc_free (tree); | |
456 | } | |
457 | ||
40165636 RB |
458 | /* This is used to check if the relationship between two classes |
459 | before the runtime completely installs the classes. */ | |
88e17b57 BE |
460 | static BOOL |
461 | class_is_subclass_of_class (Class class, Class superclass) | |
462 | { | |
463 | for (; class != Nil;) | |
464 | { | |
465 | if (class == superclass) | |
466 | return YES; | |
e083f3f9 | 467 | class = class_superclass_of_class (class); |
88e17b57 BE |
468 | } |
469 | ||
470 | return NO; | |
471 | } | |
472 | ||
40165636 RB |
473 | /* This list contains all the classes in the runtime system for whom |
474 | their superclasses are not yet known to the runtime. */ | |
475 | static struct objc_list *unresolved_classes = 0; | |
88e17b57 | 476 | |
1501d094 | 477 | /* Extern function used to reference the Object class. */ |
6000b42b JDA |
478 | extern void __objc_force_linking (void); |
479 | ||
480 | void | |
88e17b57 BE |
481 | __objc_force_linking (void) |
482 | { | |
483 | extern void __objc_linking (void); | |
484 | __objc_linking (); | |
88e17b57 BE |
485 | } |
486 | ||
40165636 RB |
487 | /* Run through the statics list, removing modules as soon as all its |
488 | statics have been initialized. */ | |
88e17b57 BE |
489 | static void |
490 | objc_init_statics (void) | |
491 | { | |
492 | struct objc_list **cell = &uninitialized_statics; | |
493 | struct objc_static_instances **statics_in_module; | |
494 | ||
40165636 | 495 | objc_mutex_lock (__objc_runtime_mutex); |
88e17b57 BE |
496 | |
497 | while (*cell) | |
498 | { | |
499 | int module_initialized = 1; | |
500 | ||
501 | for (statics_in_module = (*cell)->head; | |
502 | *statics_in_module; statics_in_module++) | |
503 | { | |
504 | struct objc_static_instances *statics = *statics_in_module; | |
fed2b101 | 505 | Class class = objc_getClass (statics->class_name); |
88e17b57 | 506 | |
40165636 | 507 | if (! class) |
88e17b57 | 508 | { |
5254c66b NP |
509 | /* It is unfortunate that this will cause all the |
510 | statics initialization to be done again (eg, if we | |
511 | already initialized constant strings, and are now | |
512 | initializing protocols, setting module_initialized to | |
513 | 0 would cause constant strings to be initialized | |
514 | again). It would be good to be able to track if we | |
515 | have already initialized some of them. */ | |
516 | module_initialized = 0; | |
517 | } | |
518 | else | |
519 | { | |
520 | /* Note that if this is a list of Protocol objects, some | |
521 | of them may have been initialized already (because | |
522 | they were attached to classes or categories, and the | |
523 | class/category loading code automatically fixes them | |
524 | up), and some of them may not. We really need to go | |
f7185d47 NP |
525 | through the whole list to be sure! Protocols are |
526 | also special because we want to register them and | |
527 | register all their selectors. */ | |
88e17b57 BE |
528 | id *inst; |
529 | ||
f7185d47 NP |
530 | if (strcmp (statics->class_name, "Protocol") == 0) |
531 | { | |
532 | /* Protocols are special, because not only we want | |
533 | to fix up their class pointers, but we also want | |
534 | to register them and their selectors with the | |
535 | runtime. */ | |
536 | for (inst = &statics->instances[0]; *inst; inst++) | |
537 | __objc_init_protocol ((struct objc_protocol *)*inst); | |
538 | } | |
539 | else | |
540 | { | |
575584a9 NP |
541 | /* Other static instances (typically constant |
542 | strings) are easier as we just fix up their class | |
543 | pointers. */ | |
f7185d47 NP |
544 | for (inst = &statics->instances[0]; *inst; inst++) |
545 | (*inst)->class_pointer = class; | |
546 | } | |
88e17b57 BE |
547 | } |
548 | } | |
549 | if (module_initialized) | |
550 | { | |
551 | /* Remove this module from the uninitialized list. */ | |
552 | struct objc_list *this = *cell; | |
553 | *cell = this->tail; | |
40165636 | 554 | objc_free (this); |
88e17b57 BE |
555 | } |
556 | else | |
557 | cell = &(*cell)->tail; | |
558 | } | |
559 | ||
40165636 | 560 | objc_mutex_unlock (__objc_runtime_mutex); |
575584a9 | 561 | } |
88e17b57 BE |
562 | |
563 | /* This function is called by constructor functions generated for each | |
40165636 RB |
564 | module compiled. (_GLOBAL_$I$...) The purpose of this function is |
565 | to gather the module pointers so that they may be processed by the | |
566 | initialization routines as soon as possible. */ | |
88e17b57 | 567 | void |
fed2b101 | 568 | __objc_exec_class (struct objc_module *module) |
88e17b57 | 569 | { |
fed2b101 NP |
570 | /* Have we processed any constructors previously? This flag is used |
571 | to indicate that some global data structures need to be | |
572 | built. */ | |
88e17b57 BE |
573 | static BOOL previous_constructors = 0; |
574 | ||
40165636 | 575 | static struct objc_list *unclaimed_categories = 0; |
88e17b57 | 576 | |
fed2b101 NP |
577 | /* The symbol table (defined in objc-private/module-abi-8.h) |
578 | generated by gcc. */ | |
579 | struct objc_symtab *symtab = module->symtab; | |
88e17b57 | 580 | |
fed2b101 | 581 | /* The statics in this module. */ |
88e17b57 BE |
582 | struct objc_static_instances **statics |
583 | = symtab->defs[symtab->cls_def_cnt + symtab->cat_def_cnt]; | |
584 | ||
fed2b101 | 585 | /* Entry used to traverse hash lists. */ |
40165636 | 586 | struct objc_list **cell; |
88e17b57 | 587 | |
fed2b101 | 588 | /* The table of selector references for this module. */ |
600cbba2 | 589 | struct objc_selector *selectors = symtab->refs; |
88e17b57 | 590 | |
88e17b57 BE |
591 | int i; |
592 | ||
e99776d8 | 593 | DEBUG_PRINTF ("\n__objc_exec_class (%p) - start processing module...\n", module); |
88e17b57 | 594 | |
575584a9 | 595 | /* Check gcc version. */ |
40165636 | 596 | init_check_module_version (module); |
88e17b57 | 597 | |
575584a9 NP |
598 | /* On the first call of this routine, initialize some data |
599 | structures. */ | |
40165636 | 600 | if (! previous_constructors) |
88e17b57 | 601 | { |
575584a9 | 602 | /* Initialize thread-safe system. */ |
40165636 | 603 | __objc_init_thread_system (); |
88e17b57 | 604 | __objc_runtime_threads_alive = 1; |
40165636 | 605 | __objc_runtime_mutex = objc_mutex_allocate (); |
88e17b57 | 606 | |
40165636 RB |
607 | __objc_init_selector_tables (); |
608 | __objc_init_class_tables (); | |
609 | __objc_init_dispatch_tables (); | |
0bfe3fa1 NP |
610 | duplicate_classes = objc_hash_new (8, |
611 | (hash_func_type)objc_hash_ptr, | |
612 | objc_compare_ptrs); | |
270a1283 DA |
613 | __objc_load_methods = objc_hash_new (128, |
614 | (hash_func_type)objc_hash_ptr, | |
615 | objc_compare_ptrs); | |
debfbfee | 616 | __objc_protocols_init (); |
682e805a | 617 | __objc_accessors_init (); |
fd312537 | 618 | __objc_sync_init (); |
88e17b57 BE |
619 | previous_constructors = 1; |
620 | } | |
621 | ||
c07499dc NP |
622 | /* Save the module pointer so that later we remember to call +load |
623 | on all classes and categories on it. */ | |
40165636 RB |
624 | objc_mutex_lock (__objc_runtime_mutex); |
625 | __objc_module_list = list_cons (module, __objc_module_list); | |
88e17b57 | 626 | |
600cbba2 | 627 | /* Replace referenced selectors from names to SELs. */ |
88e17b57 | 628 | if (selectors) |
e99776d8 NP |
629 | { |
630 | DEBUG_PRINTF (" registering selectors\n"); | |
631 | __objc_register_selectors_from_module (selectors); | |
632 | } | |
88e17b57 | 633 | |
575584a9 NP |
634 | /* Parse the classes in the load module and gather selector |
635 | information. */ | |
88e17b57 BE |
636 | for (i = 0; i < symtab->cls_def_cnt; ++i) |
637 | { | |
638 | Class class = (Class) symtab->defs[i]; | |
40165636 | 639 | const char *superclass = (char *) class->super_class; |
88e17b57 BE |
640 | |
641 | /* Make sure we have what we think. */ | |
40165636 RB |
642 | assert (CLS_ISCLASS (class)); |
643 | assert (CLS_ISMETA (class->class_pointer)); | |
e99776d8 | 644 | DEBUG_PRINTF (" installing class '%s'\n", class->name); |
88e17b57 | 645 | |
575584a9 NP |
646 | /* Initialize the subclass list to be NULL. In some cases it |
647 | isn't and this crashes the program. */ | |
88e17b57 BE |
648 | class->subclass_list = NULL; |
649 | ||
0bfe3fa1 NP |
650 | if (__objc_init_class (class)) |
651 | { | |
652 | /* Check to see if the superclass is known in this point. If | |
653 | it's not add the class to the unresolved_classes list. */ | |
654 | if (superclass && ! objc_getClass (superclass)) | |
655 | unresolved_classes = list_cons (class, unresolved_classes); | |
656 | } | |
657 | } | |
88e17b57 BE |
658 | |
659 | /* Process category information from the module. */ | |
660 | for (i = 0; i < symtab->cat_def_cnt; ++i) | |
661 | { | |
fed2b101 NP |
662 | struct objc_category *category = symtab->defs[i + symtab->cls_def_cnt]; |
663 | Class class = objc_getClass (category->class_name); | |
88e17b57 | 664 | |
575584a9 NP |
665 | /* If the class for the category exists then append its |
666 | methods. */ | |
88e17b57 BE |
667 | if (class) |
668 | { | |
e99776d8 | 669 | DEBUG_PRINTF (" installing category '%s (%s)'\n", category->class_name, category->category_name); |
88e17b57 BE |
670 | /* Do instance methods. */ |
671 | if (category->instance_methods) | |
672 | class_add_method_list (class, category->instance_methods); | |
673 | ||
674 | /* Do class methods. */ | |
675 | if (category->class_methods) | |
676 | class_add_method_list ((Class) class->class_pointer, | |
677 | category->class_methods); | |
678 | ||
679 | if (category->protocols) | |
680 | { | |
681 | __objc_init_protocols (category->protocols); | |
682 | __objc_class_add_protocols (class, category->protocols); | |
683 | } | |
684 | ||
685 | /* Register the instance methods as class methods, this is | |
40165636 RB |
686 | only done for root classes. */ |
687 | __objc_register_instance_methods_to_class (class); | |
88e17b57 BE |
688 | } |
689 | else | |
690 | { | |
e99776d8 | 691 | DEBUG_PRINTF (" delaying installation of category '%s (%s)'\n", category->class_name, category->category_name); |
575584a9 NP |
692 | /* The object to which the category methods belong can't be |
693 | found. Save the information. */ | |
40165636 | 694 | unclaimed_categories = list_cons (category, unclaimed_categories); |
88e17b57 BE |
695 | } |
696 | } | |
697 | ||
698 | if (statics) | |
699 | uninitialized_statics = list_cons (statics, uninitialized_statics); | |
700 | if (uninitialized_statics) | |
701 | objc_init_statics (); | |
702 | ||
575584a9 NP |
703 | /* Scan the unclaimed category hash. Attempt to attach any |
704 | unclaimed categories to objects. */ | |
e5e0f6f5 | 705 | for (cell = &unclaimed_categories; *cell; ) |
88e17b57 | 706 | { |
fed2b101 NP |
707 | struct objc_category *category = (*cell)->head; |
708 | Class class = objc_getClass (category->class_name); | |
88e17b57 BE |
709 | |
710 | if (class) | |
711 | { | |
e99776d8 | 712 | DEBUG_PRINTF (" installing (delayed) category '%s (%s)'\n", category->class_name, category->category_name); |
88e17b57 BE |
713 | list_remove_head (cell); |
714 | ||
715 | if (category->instance_methods) | |
716 | class_add_method_list (class, category->instance_methods); | |
717 | ||
718 | if (category->class_methods) | |
719 | class_add_method_list ((Class) class->class_pointer, | |
720 | category->class_methods); | |
721 | ||
722 | if (category->protocols) | |
723 | { | |
724 | __objc_init_protocols (category->protocols); | |
725 | __objc_class_add_protocols (class, category->protocols); | |
726 | } | |
727 | ||
728 | /* Register the instance methods as class methods, this is | |
40165636 RB |
729 | only done for root classes. */ |
730 | __objc_register_instance_methods_to_class (class); | |
88e17b57 | 731 | } |
e5e0f6f5 NP |
732 | else |
733 | cell = &(*cell)->tail; | |
88e17b57 BE |
734 | } |
735 | ||
fed2b101 | 736 | if (unclaimed_proto_list && objc_getClass ("Protocol")) |
88e17b57 | 737 | { |
40165636 RB |
738 | list_mapcar (unclaimed_proto_list, |
739 | (void (*) (void *))__objc_init_protocols); | |
88e17b57 BE |
740 | list_free (unclaimed_proto_list); |
741 | unclaimed_proto_list = 0; | |
742 | } | |
743 | ||
744 | objc_send_load (); | |
745 | ||
41720477 NP |
746 | /* Check if there are no unresolved classes (ie, classes whose |
747 | superclass has not been loaded yet) and that the 'Object' class, | |
748 | used as the class of classes, exist. If so, it is worth | |
749 | "resolving the class links" at this point, which will setup all | |
750 | the class/superclass pointers. */ | |
751 | if (!unresolved_classes && objc_getClass ("Object")) | |
e99776d8 NP |
752 | { |
753 | DEBUG_PRINTF (" resolving class links\n"); | |
754 | __objc_resolve_class_links (); | |
755 | } | |
120d5f8e | 756 | |
41720477 | 757 | objc_mutex_unlock (__objc_runtime_mutex); |
e99776d8 NP |
758 | |
759 | DEBUG_PRINTF ("__objc_exec_class (%p) - finished processing module...\n\n", module); | |
88e17b57 BE |
760 | } |
761 | ||
c07499dc NP |
762 | /* This function needs to be called with the objc_runtime_mutex |
763 | locked. */ | |
40165636 RB |
764 | static void |
765 | objc_send_load (void) | |
88e17b57 | 766 | { |
c07499dc | 767 | if (!__objc_module_list) |
88e17b57 BE |
768 | return; |
769 | ||
770 | /* Try to find out if all the classes loaded so far also have their | |
c07499dc | 771 | superclasses known to the runtime. We suppose that the objects |
40165636 RB |
772 | that are allocated in the +load method are in general of a class |
773 | declared in the same module. */ | |
88e17b57 BE |
774 | if (unresolved_classes) |
775 | { | |
776 | Class class = unresolved_classes->head; | |
777 | ||
fed2b101 | 778 | while (objc_getClass ((char *) class->super_class)) |
88e17b57 BE |
779 | { |
780 | list_remove_head (&unresolved_classes); | |
781 | if (unresolved_classes) | |
782 | class = unresolved_classes->head; | |
783 | else | |
784 | break; | |
785 | } | |
786 | ||
40165636 RB |
787 | /* If we still have classes for whom we don't have yet their |
788 | super classes known to the runtime we don't send the +load | |
1588200e | 789 | messages (and call the load callback) yet. */ |
88e17b57 BE |
790 | if (unresolved_classes) |
791 | return; | |
792 | } | |
793 | ||
1501d094 NP |
794 | /* Special check. If 'Object', which is used by meta-classes, has |
795 | not been loaded yet, delay sending of +load. */ | |
fed2b101 | 796 | if (! objc_getClass ("Object")) |
88e17b57 BE |
797 | return; |
798 | ||
40165636 | 799 | /* Iterate over all modules in the __objc_module_list and call on |
1588200e | 800 | them the __objc_create_classes_tree function. This function |
40165636 RB |
801 | creates a tree of classes that resembles the class hierarchy. */ |
802 | list_mapcar (__objc_module_list, | |
803 | (void (*) (void *)) __objc_create_classes_tree); | |
88e17b57 BE |
804 | |
805 | while (__objc_class_tree_list) | |
806 | { | |
807 | #ifdef DEBUG | |
808 | objc_preorder_traverse (__objc_class_tree_list->head, | |
809 | 0, __objc_tree_print); | |
810 | #endif | |
811 | objc_preorder_traverse (__objc_class_tree_list->head, | |
812 | 0, __objc_send_load); | |
813 | objc_postorder_traverse (__objc_class_tree_list->head, | |
814 | 0, __objc_destroy_class_tree_node); | |
815 | list_remove_head (&__objc_class_tree_list); | |
816 | } | |
817 | ||
1588200e NP |
818 | /* For each module, call the _objc_load_callback if any is |
819 | defined. */ | |
820 | list_mapcar (__objc_module_list, (void (*) (void *)) __objc_call_load_callback); | |
821 | ||
822 | /* Empty the list of modules. */ | |
88e17b57 BE |
823 | list_free (__objc_module_list); |
824 | __objc_module_list = NULL; | |
825 | } | |
826 | ||
827 | static void | |
fed2b101 | 828 | __objc_create_classes_tree (struct objc_module *module) |
88e17b57 | 829 | { |
575584a9 | 830 | /* The runtime mutex is locked at this point */ |
fed2b101 | 831 | struct objc_symtab *symtab = module->symtab; |
88e17b57 BE |
832 | int i; |
833 | ||
40165636 RB |
834 | /* Iterate thru classes defined in this module and insert them in |
835 | the classes tree hierarchy. */ | |
88e17b57 BE |
836 | for (i = 0; i < symtab->cls_def_cnt; i++) |
837 | { | |
838 | Class class = (Class) symtab->defs[i]; | |
839 | ||
0bfe3fa1 NP |
840 | if (!objc_hash_is_key_in_hash (duplicate_classes, class)) |
841 | objc_tree_insert_class (class); | |
88e17b57 | 842 | } |
c07499dc NP |
843 | |
844 | /* Now iterate over "claimed" categories too (ie, categories that | |
845 | extend a class that has already been loaded by the runtime), and | |
846 | insert them in the classes tree hiearchy too. Otherwise, if you | |
847 | add a category, its +load method would not be called if the class | |
848 | is already loaded in the runtime. It the category is | |
849 | "unclaimed", ie, we haven't loaded the main class yet, postpone | |
850 | sending +load as we want to execute +load from the class before | |
851 | we execute the one from the category. */ | |
852 | for (i = 0; i < symtab->cat_def_cnt; ++i) | |
853 | { | |
854 | struct objc_category *category = symtab->defs[i + symtab->cls_def_cnt]; | |
855 | Class class = objc_getClass (category->class_name); | |
856 | ||
857 | /* If the class for the category exists then append its | |
858 | methods. */ | |
859 | if (class) | |
860 | objc_tree_insert_class (class); | |
861 | } | |
88e17b57 BE |
862 | } |
863 | ||
864 | static void | |
1588200e | 865 | __objc_call_load_callback (struct objc_module *module) |
88e17b57 | 866 | { |
1588200e | 867 | if (_objc_load_callback) |
88e17b57 | 868 | { |
1588200e NP |
869 | /* The runtime mutex is locked at this point. */ |
870 | struct objc_symtab *symtab = module->symtab; | |
871 | int i; | |
872 | ||
873 | /* Iterate thru classes defined in this module and call the callback | |
874 | for each one. */ | |
875 | for (i = 0; i < symtab->cls_def_cnt; i++) | |
876 | { | |
877 | Class class = (Class) symtab->defs[i]; | |
0bfe3fa1 NP |
878 | |
879 | if (!objc_hash_is_key_in_hash (duplicate_classes, class)) | |
880 | { | |
881 | /* Call the _objc_load_callback for this class. */ | |
e99776d8 | 882 | DEBUG_PRINTF (" calling the load callback for class '%s'\n", class->name); |
0bfe3fa1 NP |
883 | _objc_load_callback (class, 0); |
884 | } | |
1588200e NP |
885 | } |
886 | ||
887 | /* Call the _objc_load_callback for categories. Don't register | |
888 | the instance methods as class methods for categories to root | |
889 | classes since they were already added in the class. */ | |
890 | for (i = 0; i < symtab->cat_def_cnt; i++) | |
891 | { | |
892 | struct objc_category *category = symtab->defs[i + symtab->cls_def_cnt]; | |
893 | Class class = objc_getClass (category->class_name); | |
894 | ||
e99776d8 NP |
895 | DEBUG_PRINTF (" calling the load callback for category '%s (%s)'\n", |
896 | category->class_name, category->category_name); | |
1588200e NP |
897 | _objc_load_callback (class, category); |
898 | } | |
88e17b57 BE |
899 | } |
900 | } | |
901 | ||
40165636 | 902 | /* Sanity check the version of gcc used to compile `module'. */ |
40165636 | 903 | static void |
fed2b101 | 904 | init_check_module_version (struct objc_module *module) |
88e17b57 | 905 | { |
fed2b101 | 906 | if ((module->version != OBJC_VERSION) || (module->size != sizeof (struct objc_module))) |
88e17b57 | 907 | { |
7b869986 NP |
908 | _objc_abort ("Module %s version %d doesn't match runtime %d\n", |
909 | module->name, (int)module->version, OBJC_VERSION); | |
88e17b57 BE |
910 | } |
911 | } | |
912 | ||
0bfe3fa1 NP |
913 | /* __objc_init_class must be called with __objc_runtime_mutex already |
914 | locked. Return YES if the class could be setup; return NO if the | |
915 | class could not be setup because a class with the same name already | |
916 | exists. */ | |
917 | BOOL | |
6c5c7efd NP |
918 | __objc_init_class (Class class) |
919 | { | |
920 | /* Store the class in the class table and assign class numbers. */ | |
1575c9de NP |
921 | if (__objc_add_class_to_hash (class)) |
922 | { | |
923 | /* Register all of the selectors in the class and meta class. */ | |
924 | __objc_register_selectors_from_class (class); | |
925 | __objc_register_selectors_from_class ((Class) class->class_pointer); | |
926 | ||
927 | /* Install the fake dispatch tables. */ | |
928 | __objc_install_premature_dtable (class); | |
929 | __objc_install_premature_dtable (class->class_pointer); | |
930 | ||
931 | /* Register the instance methods as class methods, this is only | |
932 | done for root classes. */ | |
933 | __objc_register_instance_methods_to_class (class); | |
934 | ||
935 | if (class->protocols) | |
936 | __objc_init_protocols (class->protocols); | |
0bfe3fa1 NP |
937 | |
938 | return YES; | |
1575c9de NP |
939 | } |
940 | else | |
0bfe3fa1 NP |
941 | { |
942 | /* The module contains a duplicate class. Remember it so that | |
943 | we will ignore it later. */ | |
e99776d8 | 944 | DEBUG_PRINTF (" duplicate class '%s' - will be ignored\n", class->name); |
0bfe3fa1 NP |
945 | objc_hash_add (&duplicate_classes, class, class); |
946 | return NO; | |
947 | } | |
6c5c7efd NP |
948 | } |
949 | ||
f7185d47 NP |
950 | /* __objc_init_protocol must be called with __objc_runtime_mutex |
951 | already locked, and the "Protocol" class already registered. */ | |
952 | static void | |
953 | __objc_init_protocol (struct objc_protocol *protocol) | |
954 | { | |
955 | static Class proto_class = 0; | |
956 | ||
957 | if (! proto_class) | |
fed2b101 | 958 | proto_class = objc_getClass ("Protocol"); |
f7185d47 NP |
959 | |
960 | if (((size_t)protocol->class_pointer) == PROTOCOL_VERSION) | |
961 | { | |
575584a9 | 962 | /* Assign class pointer. */ |
f7185d47 NP |
963 | protocol->class_pointer = proto_class; |
964 | ||
965 | /* Register all the selectors in the protocol with the runtime. | |
966 | This both registers the selectors with the right types, and | |
967 | it also fixes up the 'struct objc_method' structures inside | |
968 | the protocol so that each method_name (a char * as compiled | |
969 | by the compiler) is replaced with the appropriate runtime | |
970 | SEL. */ | |
971 | if (protocol->class_methods) | |
972 | __objc_register_selectors_from_description_list (protocol->class_methods); | |
973 | ||
974 | if (protocol->instance_methods) | |
975 | __objc_register_selectors_from_description_list (protocol->instance_methods); | |
976 | ||
977 | /* Register the protocol in the hashtable or protocols by | |
978 | name. */ | |
979 | __objc_protocols_add_protocol (protocol->protocol_name, protocol); | |
980 | ||
575584a9 | 981 | /* Init super protocols. */ |
f7185d47 NP |
982 | __objc_init_protocols (protocol->protocol_list); |
983 | } | |
984 | else if (protocol->class_pointer != proto_class) | |
985 | { | |
986 | _objc_abort ("Version %d doesn't match runtime protocol version %d\n", | |
987 | (int) ((char *) protocol->class_pointer | |
988 | - (char *) 0), | |
989 | PROTOCOL_VERSION); | |
990 | } | |
991 | } | |
992 | ||
88e17b57 | 993 | static void |
40165636 | 994 | __objc_init_protocols (struct objc_protocol_list *protos) |
88e17b57 | 995 | { |
8f8c44cb | 996 | size_t i; |
88e17b57 BE |
997 | static Class proto_class = 0; |
998 | ||
999 | if (! protos) | |
1000 | return; | |
1001 | ||
40165636 | 1002 | objc_mutex_lock (__objc_runtime_mutex); |
88e17b57 | 1003 | |
40165636 | 1004 | if (! proto_class) |
fed2b101 | 1005 | proto_class = objc_getClass ("Protocol"); |
88e17b57 | 1006 | |
40165636 | 1007 | if (! proto_class) |
88e17b57 BE |
1008 | { |
1009 | unclaimed_proto_list = list_cons (protos, unclaimed_proto_list); | |
40165636 | 1010 | objc_mutex_unlock (__objc_runtime_mutex); |
88e17b57 BE |
1011 | return; |
1012 | } | |
1013 | ||
1014 | #if 0 | |
575584a9 | 1015 | assert (protos->next == 0); /* Only single ones allowed. */ |
88e17b57 BE |
1016 | #endif |
1017 | ||
40165636 | 1018 | for (i = 0; i < protos->count; i++) |
88e17b57 | 1019 | { |
40165636 | 1020 | struct objc_protocol *aProto = protos->list[i]; |
f7185d47 | 1021 | __objc_init_protocol (aProto); |
88e17b57 BE |
1022 | } |
1023 | ||
40165636 | 1024 | objc_mutex_unlock (__objc_runtime_mutex); |
88e17b57 BE |
1025 | } |
1026 | ||
40165636 RB |
1027 | static void |
1028 | __objc_class_add_protocols (Class class, struct objc_protocol_list *protos) | |
88e17b57 | 1029 | { |
88e17b57 BE |
1030 | if (! protos) |
1031 | return; | |
1032 | ||
88e17b57 BE |
1033 | protos->next = class->protocols; |
1034 | class->protocols = protos; | |
1035 | } |