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88e17b57 | 1 | /* Sparse Arrays for Objective C dispatch tables |
a945c346 | 2 | Copyright (C) 1993-2024 Free Software Foundation, Inc. |
88e17b57 | 3 | |
38709cad | 4 | This file is part of GCC. |
88e17b57 | 5 | |
38709cad | 6 | GCC is free software; you can redistribute it and/or modify |
88e17b57 | 7 | it under the terms of the GNU General Public License as published by |
748086b7 | 8 | the Free Software Foundation; either version 3, or (at your option) |
88e17b57 BE |
9 | any later version. |
10 | ||
38709cad | 11 | GCC is distributed in the hope that it will be useful, |
88e17b57 BE |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
748086b7 JJ |
16 | Under Section 7 of GPL version 3, you are granted additional |
17 | permissions described in the GCC Runtime Library Exception, version | |
18 | 3.1, as published by the Free Software Foundation. | |
19 | ||
20 | You should have received a copy of the GNU General Public License and | |
21 | a copy of the GCC Runtime Library Exception along with this program; | |
22 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 | <http://www.gnu.org/licenses/>. */ | |
88e17b57 | 24 | |
6dead247 | 25 | #include "objc-private/common.h" |
5d3b14bd | 26 | #include "objc-private/sarray.h" |
718a8e53 NP |
27 | #include "objc/runtime.h" /* For objc_malloc */ |
28 | #include "objc/thr.h" /* For objc_mutex_lock */ | |
80e4b9e5 | 29 | #include "objc-private/module-abi-8.h" |
a19fac96 | 30 | #include "objc-private/runtime.h" |
88e17b57 | 31 | #include <stdio.h> |
5be9cdc1 | 32 | #include <string.h> /* For memset */ |
5d3b14bd | 33 | #include <assert.h> /* For assert */ |
88e17b57 BE |
34 | |
35 | int nbuckets = 0; /* !T:MUTEX */ | |
36 | int nindices = 0; /* !T:MUTEX */ | |
37 | int narrays = 0; /* !T:MUTEX */ | |
38 | int idxsize = 0; /* !T:MUTEX */ | |
39 | ||
40165636 | 40 | static void *first_free_data = NULL; /* !T:MUTEX */ |
88e17b57 BE |
41 | |
42 | #ifdef OBJC_SPARSE2 | |
40165636 | 43 | const char *__objc_sparse2_id = "2 level sparse indices"; |
88e17b57 BE |
44 | #endif |
45 | ||
46 | #ifdef OBJC_SPARSE3 | |
40165636 | 47 | const char *__objc_sparse3_id = "3 level sparse indices"; |
88e17b57 BE |
48 | #endif |
49 | ||
88e17b57 BE |
50 | /* This function removes any structures left over from free operations |
51 | that were not safe in a multi-threaded environment. */ | |
52 | void | |
40165636 | 53 | sarray_remove_garbage (void) |
88e17b57 BE |
54 | { |
55 | void **vp; | |
56 | void *np; | |
57 | ||
40165636 | 58 | objc_mutex_lock (__objc_runtime_mutex); |
88e17b57 BE |
59 | |
60 | vp = first_free_data; | |
61 | first_free_data = NULL; | |
62 | ||
575584a9 NP |
63 | while (vp) |
64 | { | |
65 | np = *vp; | |
66 | objc_free (vp); | |
67 | vp = np; | |
68 | } | |
88e17b57 | 69 | |
40165636 | 70 | objc_mutex_unlock (__objc_runtime_mutex); |
88e17b57 BE |
71 | } |
72 | ||
575584a9 NP |
73 | /* Free a block of dynamically allocated memory. If we are in |
74 | multi-threaded mode, it is ok to free it. If not, we add it to the | |
75 | garbage heap to be freed later. */ | |
88e17b57 | 76 | static void |
40165636 | 77 | sarray_free_garbage (void *vp) |
88e17b57 | 78 | { |
40165636 | 79 | objc_mutex_lock (__objc_runtime_mutex); |
88e17b57 | 80 | |
575584a9 NP |
81 | if (__objc_runtime_threads_alive == 1) |
82 | { | |
83 | objc_free (vp); | |
84 | if (first_free_data) | |
85 | sarray_remove_garbage (); | |
86 | } | |
87 | else | |
88 | { | |
89 | *(void **)vp = first_free_data; | |
90 | first_free_data = vp; | |
91 | } | |
92 | ||
40165636 | 93 | objc_mutex_unlock (__objc_runtime_mutex); |
88e17b57 BE |
94 | } |
95 | ||
575584a9 NP |
96 | /* sarray_at_put copies data in such a way as to be thread reader |
97 | safe. */ | |
88e17b57 | 98 | void |
40165636 | 99 | sarray_at_put (struct sarray *array, sidx index, void *element) |
88e17b57 BE |
100 | { |
101 | #ifdef OBJC_SPARSE3 | |
40165636 RB |
102 | struct sindex **the_index; |
103 | struct sindex *new_index; | |
88e17b57 | 104 | #endif |
40165636 RB |
105 | struct sbucket **the_bucket; |
106 | struct sbucket *new_bucket; | |
88e17b57 BE |
107 | #ifdef OBJC_SPARSE3 |
108 | size_t ioffset; | |
109 | #endif | |
110 | size_t boffset; | |
111 | size_t eoffset; | |
112 | #ifdef PRECOMPUTE_SELECTORS | |
113 | union sofftype xx; | |
114 | xx.idx = index; | |
115 | #ifdef OBJC_SPARSE3 | |
116 | ioffset = xx.off.ioffset; | |
117 | #endif | |
118 | boffset = xx.off.boffset; | |
119 | eoffset = xx.off.eoffset; | |
120 | #else /* not PRECOMPUTE_SELECTORS */ | |
121 | #ifdef OBJC_SPARSE3 | |
122 | ioffset = index/INDEX_CAPACITY; | |
123 | boffset = (index/BUCKET_SIZE)%INDEX_SIZE; | |
124 | eoffset = index%BUCKET_SIZE; | |
125 | #else | |
126 | boffset = index/BUCKET_SIZE; | |
127 | eoffset = index%BUCKET_SIZE; | |
128 | #endif | |
129 | #endif /* not PRECOMPUTE_SELECTORS */ | |
130 | ||
40165636 | 131 | assert (soffset_decode (index) < array->capacity); /* Range check */ |
88e17b57 BE |
132 | |
133 | #ifdef OBJC_SPARSE3 | |
134 | the_index = &(array->indices[ioffset]); | |
135 | the_bucket = &((*the_index)->buckets[boffset]); | |
136 | #else | |
137 | the_bucket = &(array->buckets[boffset]); | |
138 | #endif | |
139 | ||
140 | if ((*the_bucket)->elems[eoffset] == element) | |
575584a9 | 141 | return; /* Great! we just avoided a lazy copy. */ |
88e17b57 BE |
142 | |
143 | #ifdef OBJC_SPARSE3 | |
144 | ||
575584a9 | 145 | /* First, perform lazy copy/allocation of index if needed. */ |
88e17b57 | 146 | |
575584a9 NP |
147 | if ((*the_index) == array->empty_index) |
148 | { | |
149 | /* The index was previously empty, allocate a new. */ | |
150 | new_index = (struct sindex *) objc_malloc (sizeof (struct sindex)); | |
151 | memcpy (new_index, array->empty_index, sizeof (struct sindex)); | |
152 | new_index->version.version = array->version.version; | |
153 | *the_index = new_index; /* Prepared for install. */ | |
154 | the_bucket = &((*the_index)->buckets[boffset]); | |
155 | ||
156 | nindices += 1; | |
157 | } | |
158 | else if ((*the_index)->version.version != array->version.version) | |
159 | { | |
160 | /* This index must be lazy copied. */ | |
161 | struct sindex *old_index = *the_index; | |
162 | new_index = (struct sindex *) objc_malloc (sizeof (struct sindex)); | |
163 | memcpy (new_index, old_index, sizeof (struct sindex)); | |
164 | new_index->version.version = array->version.version; | |
165 | *the_index = new_index; /* Prepared for install. */ | |
166 | the_bucket = &((*the_index)->buckets[boffset]); | |
167 | ||
168 | nindices += 1; | |
169 | } | |
170 | ||
88e17b57 | 171 | #endif /* OBJC_SPARSE3 */ |
575584a9 NP |
172 | |
173 | /* Next, perform lazy allocation/copy of the bucket if needed. */ | |
174 | if ((*the_bucket) == array->empty_bucket) | |
175 | { | |
176 | /* The bucket was previously empty (or something like that), | |
177 | allocate a new. This is the effect of `lazy' allocation. */ | |
178 | new_bucket = (struct sbucket *) objc_malloc (sizeof (struct sbucket)); | |
179 | memcpy ((void *) new_bucket, (const void *) array->empty_bucket, | |
180 | sizeof (struct sbucket)); | |
181 | new_bucket->version.version = array->version.version; | |
182 | *the_bucket = new_bucket; /* Prepared for install. */ | |
183 | ||
184 | nbuckets += 1; | |
185 | ||
186 | } | |
187 | else if ((*the_bucket)->version.version != array->version.version) | |
188 | { | |
189 | /* Perform lazy copy. */ | |
190 | struct sbucket *old_bucket = *the_bucket; | |
191 | new_bucket = (struct sbucket *) objc_malloc (sizeof (struct sbucket)); | |
192 | memcpy (new_bucket, old_bucket, sizeof (struct sbucket)); | |
193 | new_bucket->version.version = array->version.version; | |
194 | *the_bucket = new_bucket; /* Prepared for install. */ | |
195 | ||
196 | nbuckets += 1; | |
197 | } | |
88e17b57 BE |
198 | (*the_bucket)->elems[eoffset] = element; |
199 | } | |
200 | ||
201 | void | |
40165636 | 202 | sarray_at_put_safe (struct sarray *array, sidx index, void *element) |
88e17b57 | 203 | { |
40165636 RB |
204 | if (soffset_decode (index) >= array->capacity) |
205 | sarray_realloc (array, soffset_decode (index) + 1); | |
206 | sarray_at_put (array, index, element); | |
88e17b57 BE |
207 | } |
208 | ||
40165636 RB |
209 | struct sarray * |
210 | sarray_new (int size, void *default_element) | |
88e17b57 | 211 | { |
40165636 | 212 | struct sarray *arr; |
88e17b57 | 213 | #ifdef OBJC_SPARSE3 |
40165636 RB |
214 | size_t num_indices = ((size - 1)/(INDEX_CAPACITY)) + 1; |
215 | struct sindex **new_indices; | |
88e17b57 | 216 | #else /* OBJC_SPARSE2 */ |
40165636 RB |
217 | size_t num_indices = ((size - 1)/BUCKET_SIZE) + 1; |
218 | struct sbucket **new_buckets; | |
88e17b57 | 219 | #endif |
8f8c44cb | 220 | size_t counter; |
88e17b57 | 221 | |
40165636 | 222 | assert (size > 0); |
88e17b57 | 223 | |
575584a9 | 224 | /* Allocate core array. */ |
40165636 | 225 | arr = (struct sarray *) objc_malloc (sizeof (struct sarray)); |
88e17b57 BE |
226 | arr->version.version = 0; |
227 | ||
575584a9 | 228 | /* Initialize members. */ |
88e17b57 BE |
229 | #ifdef OBJC_SPARSE3 |
230 | arr->capacity = num_indices*INDEX_CAPACITY; | |
40165636 RB |
231 | new_indices = (struct sindex **) |
232 | objc_malloc (sizeof (struct sindex *) * num_indices); | |
575584a9 | 233 | |
40165636 | 234 | arr->empty_index = (struct sindex *) objc_malloc (sizeof (struct sindex)); |
88e17b57 BE |
235 | arr->empty_index->version.version = 0; |
236 | ||
237 | narrays += 1; | |
238 | idxsize += num_indices; | |
239 | nindices += 1; | |
240 | ||
241 | #else /* OBJC_SPARSE2 */ | |
242 | arr->capacity = num_indices*BUCKET_SIZE; | |
40165636 RB |
243 | new_buckets = (struct sbucket **) |
244 | objc_malloc (sizeof (struct sbucket *) * num_indices); | |
88e17b57 BE |
245 | |
246 | narrays += 1; | |
247 | idxsize += num_indices; | |
248 | ||
249 | #endif | |
250 | ||
40165636 | 251 | arr->empty_bucket = (struct sbucket *) objc_malloc (sizeof (struct sbucket)); |
88e17b57 BE |
252 | arr->empty_bucket->version.version = 0; |
253 | ||
254 | nbuckets += 1; | |
255 | ||
256 | arr->ref_count = 1; | |
40165636 | 257 | arr->is_copy_of = (struct sarray *) 0; |
88e17b57 | 258 | |
40165636 | 259 | for (counter = 0; counter < BUCKET_SIZE; counter++) |
88e17b57 BE |
260 | arr->empty_bucket->elems[counter] = default_element; |
261 | ||
262 | #ifdef OBJC_SPARSE3 | |
40165636 | 263 | for (counter = 0; counter < INDEX_SIZE; counter++) |
88e17b57 BE |
264 | arr->empty_index->buckets[counter] = arr->empty_bucket; |
265 | ||
40165636 | 266 | for (counter = 0; counter < num_indices; counter++) |
88e17b57 BE |
267 | new_indices[counter] = arr->empty_index; |
268 | ||
269 | #else /* OBJC_SPARSE2 */ | |
270 | ||
40165636 | 271 | for (counter = 0; counter < num_indices; counter++) |
88e17b57 BE |
272 | new_buckets[counter] = arr->empty_bucket; |
273 | ||
274 | #endif | |
275 | ||
276 | #ifdef OBJC_SPARSE3 | |
277 | arr->indices = new_indices; | |
278 | #else /* OBJC_SPARSE2 */ | |
279 | arr->buckets = new_buckets; | |
280 | #endif | |
281 | ||
282 | return arr; | |
283 | } | |
284 | \f | |
285 | ||
575584a9 NP |
286 | /* Reallocate the sparse array to hold `newsize' entries Note: We |
287 | really allocate and then free. We have to do this to ensure that | |
288 | any concurrent readers notice the update. */ | |
88e17b57 | 289 | void |
40165636 | 290 | sarray_realloc (struct sarray *array, int newsize) |
88e17b57 BE |
291 | { |
292 | #ifdef OBJC_SPARSE3 | |
40165636 RB |
293 | size_t old_max_index = (array->capacity - 1)/INDEX_CAPACITY; |
294 | size_t new_max_index = ((newsize - 1)/INDEX_CAPACITY); | |
295 | size_t rounded_size = (new_max_index + 1) * INDEX_CAPACITY; | |
88e17b57 | 296 | |
40165636 RB |
297 | struct sindex **new_indices; |
298 | struct sindex **old_indices; | |
88e17b57 BE |
299 | |
300 | #else /* OBJC_SPARSE2 */ | |
40165636 RB |
301 | size_t old_max_index = (array->capacity - 1)/BUCKET_SIZE; |
302 | size_t new_max_index = ((newsize - 1)/BUCKET_SIZE); | |
303 | size_t rounded_size = (new_max_index + 1) * BUCKET_SIZE; | |
88e17b57 | 304 | |
40165636 RB |
305 | struct sbucket **new_buckets; |
306 | struct sbucket **old_buckets; | |
88e17b57 BE |
307 | |
308 | #endif | |
309 | ||
8f8c44cb | 310 | size_t counter; |
88e17b57 | 311 | |
40165636 | 312 | assert (newsize > 0); |
88e17b57 | 313 | |
575584a9 | 314 | /* The size is the same, just ignore the request. */ |
40165636 | 315 | if (rounded_size <= array->capacity) |
88e17b57 BE |
316 | return; |
317 | ||
40165636 | 318 | assert (array->ref_count == 1); /* stop if lazy copied... */ |
88e17b57 | 319 | |
575584a9 NP |
320 | /* We are asked to extend the array -- allocate new bucket table, |
321 | and insert empty_bucket in newly allocated places. */ | |
40165636 | 322 | if (rounded_size > array->capacity) |
88e17b57 | 323 | { |
88e17b57 BE |
324 | #ifdef OBJC_SPARSE3 |
325 | new_max_index += 4; | |
40165636 | 326 | rounded_size = (new_max_index + 1) * INDEX_CAPACITY; |
88e17b57 BE |
327 | #else /* OBJC_SPARSE2 */ |
328 | new_max_index += 4; | |
40165636 | 329 | rounded_size = (new_max_index + 1) * BUCKET_SIZE; |
88e17b57 BE |
330 | #endif |
331 | ||
575584a9 | 332 | /* Update capacity. */ |
88e17b57 BE |
333 | array->capacity = rounded_size; |
334 | ||
335 | #ifdef OBJC_SPARSE3 | |
575584a9 | 336 | /* Alloc to force re-read by any concurrent readers. */ |
88e17b57 | 337 | old_indices = array->indices; |
40165636 RB |
338 | new_indices = (struct sindex **) |
339 | objc_malloc ((new_max_index + 1) * sizeof (struct sindex *)); | |
88e17b57 BE |
340 | #else /* OBJC_SPARSE2 */ |
341 | old_buckets = array->buckets; | |
40165636 RB |
342 | new_buckets = (struct sbucket **) |
343 | objc_malloc ((new_max_index + 1) * sizeof (struct sbucket *)); | |
88e17b57 BE |
344 | #endif |
345 | ||
575584a9 NP |
346 | /* Copy buckets below old_max_index (they are still valid). */ |
347 | for (counter = 0; counter <= old_max_index; counter++ ) | |
348 | { | |
88e17b57 | 349 | #ifdef OBJC_SPARSE3 |
575584a9 | 350 | new_indices[counter] = old_indices[counter]; |
88e17b57 | 351 | #else /* OBJC_SPARSE2 */ |
575584a9 | 352 | new_buckets[counter] = old_buckets[counter]; |
88e17b57 | 353 | #endif |
575584a9 | 354 | } |
88e17b57 BE |
355 | |
356 | #ifdef OBJC_SPARSE3 | |
575584a9 | 357 | /* Reset entries above old_max_index to empty_bucket. */ |
40165636 | 358 | for (counter = old_max_index + 1; counter <= new_max_index; counter++) |
88e17b57 BE |
359 | new_indices[counter] = array->empty_index; |
360 | #else /* OBJC_SPARSE2 */ | |
575584a9 | 361 | /* Reset entries above old_max_index to empty_bucket. */ |
40165636 | 362 | for (counter = old_max_index + 1; counter <= new_max_index; counter++) |
88e17b57 BE |
363 | new_buckets[counter] = array->empty_bucket; |
364 | #endif | |
365 | ||
366 | #ifdef OBJC_SPARSE3 | |
575584a9 | 367 | /* Install the new indices. */ |
88e17b57 BE |
368 | array->indices = new_indices; |
369 | #else /* OBJC_SPARSE2 */ | |
370 | array->buckets = new_buckets; | |
371 | #endif | |
372 | ||
373 | #ifdef OBJC_SPARSE3 | |
575584a9 | 374 | /* Free the old indices. */ |
40165636 | 375 | sarray_free_garbage (old_indices); |
88e17b57 | 376 | #else /* OBJC_SPARSE2 */ |
40165636 | 377 | sarray_free_garbage (old_buckets); |
88e17b57 BE |
378 | #endif |
379 | ||
380 | idxsize += (new_max_index-old_max_index); | |
381 | return; | |
382 | } | |
383 | } | |
384 | \f | |
385 | ||
386 | /* Free a sparse array allocated with sarray_new */ | |
88e17b57 | 387 | void |
40165636 | 388 | sarray_free (struct sarray *array) { |
88e17b57 | 389 | #ifdef OBJC_SPARSE3 |
40165636 RB |
390 | size_t old_max_index = (array->capacity - 1)/INDEX_CAPACITY; |
391 | struct sindex **old_indices; | |
88e17b57 | 392 | #else |
40165636 RB |
393 | size_t old_max_index = (array->capacity - 1)/BUCKET_SIZE; |
394 | struct sbucket **old_buckets; | |
88e17b57 | 395 | #endif |
8f8c44cb | 396 | size_t counter = 0; |
88e17b57 | 397 | |
40165636 | 398 | assert (array->ref_count != 0); /* Freed multiple times!!! */ |
88e17b57 | 399 | |
40165636 | 400 | if (--(array->ref_count) != 0) /* There exists copies of me */ |
88e17b57 BE |
401 | return; |
402 | ||
403 | #ifdef OBJC_SPARSE3 | |
404 | old_indices = array->indices; | |
405 | #else | |
406 | old_buckets = array->buckets; | |
407 | #endif | |
88e17b57 | 408 | |
575584a9 NP |
409 | /* Free all entries that do not point to empty_bucket. */ |
410 | for (counter = 0; counter <= old_max_index; counter++ ) | |
411 | { | |
88e17b57 | 412 | #ifdef OBJC_SPARSE3 |
575584a9 NP |
413 | struct sindex *idx = old_indices[counter]; |
414 | if ((idx != array->empty_index) | |
415 | && (idx->version.version == array->version.version)) | |
416 | { | |
417 | int c2; | |
418 | for (c2 = 0; c2 < INDEX_SIZE; c2++) | |
419 | { | |
420 | struct sbucket *bkt = idx->buckets[c2]; | |
421 | if ((bkt != array->empty_bucket) | |
422 | && (bkt->version.version == array->version.version)) | |
423 | { | |
424 | sarray_free_garbage (bkt); | |
425 | nbuckets -= 1; | |
426 | } | |
427 | } | |
428 | sarray_free_garbage (idx); | |
429 | nindices -= 1; | |
430 | } | |
88e17b57 | 431 | #else /* OBJC_SPARSE2 */ |
575584a9 NP |
432 | struct sbucket *bkt = old_buckets[counter]; |
433 | if ((bkt != array->empty_bucket) | |
434 | && (bkt->version.version == array->version.version)) | |
435 | { | |
436 | sarray_free_garbage (bkt); | |
437 | nbuckets -= 1; | |
438 | } | |
88e17b57 | 439 | #endif |
575584a9 NP |
440 | } |
441 | ||
88e17b57 | 442 | #ifdef OBJC_SPARSE3 |
575584a9 NP |
443 | /* Free empty_index. */ |
444 | if (array->empty_index->version.version == array->version.version) | |
445 | { | |
446 | sarray_free_garbage (array->empty_index); | |
447 | nindices -= 1; | |
448 | } | |
88e17b57 BE |
449 | #endif |
450 | ||
575584a9 NP |
451 | /* Free empty_bucket. */ |
452 | if (array->empty_bucket->version.version == array->version.version) | |
453 | { | |
454 | sarray_free_garbage (array->empty_bucket); | |
455 | nbuckets -= 1; | |
456 | } | |
40165636 | 457 | idxsize -= (old_max_index + 1); |
88e17b57 | 458 | narrays -= 1; |
575584a9 | 459 | |
88e17b57 | 460 | #ifdef OBJC_SPARSE3 |
575584a9 | 461 | /* Free bucket table. */ |
40165636 | 462 | sarray_free_garbage (array->indices); |
88e17b57 | 463 | #else |
575584a9 | 464 | /* Free bucket table. */ |
40165636 | 465 | sarray_free_garbage (array->buckets); |
88e17b57 BE |
466 | #endif |
467 | ||
435317e2 | 468 | /* If this is a copy of another array, we free it (which might just |
575584a9 NP |
469 | decrement its reference count so it will be freed when no longer |
470 | in use). */ | |
b39f1868 AR |
471 | if (array->is_copy_of) |
472 | sarray_free (array->is_copy_of); | |
473 | ||
575584a9 | 474 | /* Free array. */ |
40165636 | 475 | sarray_free_garbage (array); |
88e17b57 BE |
476 | } |
477 | ||
575584a9 NP |
478 | /* This is a lazy copy. Only the core of the structure is actually |
479 | copied. */ | |
40165636 RB |
480 | struct sarray * |
481 | sarray_lazy_copy (struct sarray *oarr) | |
88e17b57 | 482 | { |
40165636 | 483 | struct sarray *arr; |
88e17b57 BE |
484 | |
485 | #ifdef OBJC_SPARSE3 | |
40165636 RB |
486 | size_t num_indices = ((oarr->capacity - 1)/INDEX_CAPACITY) + 1; |
487 | struct sindex **new_indices; | |
88e17b57 | 488 | #else /* OBJC_SPARSE2 */ |
40165636 RB |
489 | size_t num_indices = ((oarr->capacity - 1)/BUCKET_SIZE) + 1; |
490 | struct sbucket **new_buckets; | |
88e17b57 BE |
491 | #endif |
492 | ||
575584a9 | 493 | /* Allocate core array. */ |
40165636 | 494 | arr = (struct sarray *) objc_malloc (sizeof (struct sarray)); /* !!! */ |
88e17b57 BE |
495 | arr->version.version = oarr->version.version + 1; |
496 | #ifdef OBJC_SPARSE3 | |
497 | arr->empty_index = oarr->empty_index; | |
498 | #endif | |
499 | arr->empty_bucket = oarr->empty_bucket; | |
500 | arr->ref_count = 1; | |
501 | oarr->ref_count += 1; | |
502 | arr->is_copy_of = oarr; | |
503 | arr->capacity = oarr->capacity; | |
504 | ||
505 | #ifdef OBJC_SPARSE3 | |
575584a9 | 506 | /* Copy bucket table. */ |
40165636 RB |
507 | new_indices = (struct sindex **) |
508 | objc_malloc (sizeof (struct sindex *) * num_indices); | |
509 | memcpy (new_indices, oarr->indices, sizeof (struct sindex *) * num_indices); | |
88e17b57 BE |
510 | arr->indices = new_indices; |
511 | #else | |
575584a9 | 512 | /* Copy bucket table. */ |
40165636 RB |
513 | new_buckets = (struct sbucket **) |
514 | objc_malloc (sizeof (struct sbucket *) * num_indices); | |
515 | memcpy (new_buckets, oarr->buckets, sizeof (struct sbucket *) * num_indices); | |
88e17b57 BE |
516 | arr->buckets = new_buckets; |
517 | #endif | |
518 | ||
519 | idxsize += num_indices; | |
520 | narrays += 1; | |
521 | ||
522 | return arr; | |
523 | } |