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00020 #include "asterisk.h"
00021
00022 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 298957 $")
00023
00024 #include "asterisk/_private.h"
00025 #include "asterisk/astobj2.h"
00026 #include "asterisk/utils.h"
00027 #include "asterisk/cli.h"
00028 #define REF_FILE "/tmp/refs"
00029
00030
00031
00032
00033
00034
00035
00036
00037
00038
00039
00040 struct __priv_data {
00041 ast_mutex_t lock;
00042 int ref_counter;
00043 ao2_destructor_fn destructor_fn;
00044
00045 size_t data_size;
00046
00047
00048 uint32_t magic;
00049 };
00050
00051 #define AO2_MAGIC 0xa570b123
00052
00053
00054
00055
00056
00057 struct astobj2 {
00058 struct __priv_data priv_data;
00059 void *user_data[0];
00060 };
00061
00062 #ifdef AST_DEVMODE
00063 #define AO2_DEBUG 1
00064 #endif
00065
00066 #ifdef AO2_DEBUG
00067 struct ao2_stats {
00068 volatile int total_objects;
00069 volatile int total_mem;
00070 volatile int total_containers;
00071 volatile int total_refs;
00072 volatile int total_locked;
00073 };
00074
00075 static struct ao2_stats ao2;
00076 #endif
00077
00078 #ifndef HAVE_BKTR
00079 void ao2_bt(void) {}
00080 #else
00081 #include <execinfo.h>
00082
00083 void ao2_bt(void)
00084 {
00085 int c, i;
00086 #define N1 20
00087 void *addresses[N1];
00088 char **strings;
00089
00090 c = backtrace(addresses, N1);
00091 strings = ast_bt_get_symbols(addresses,c);
00092 ast_verbose("backtrace returned: %d\n", c);
00093 for(i = 0; i < c; i++) {
00094 ast_verbose("%d: %p %s\n", i, addresses[i], strings[i]);
00095 }
00096 free(strings);
00097 }
00098 #endif
00099
00100
00101
00102
00103
00104
00105 static inline struct astobj2 *INTERNAL_OBJ(void *user_data)
00106 {
00107 struct astobj2 *p;
00108
00109 if (!user_data) {
00110 ast_log(LOG_ERROR, "user_data is NULL\n");
00111 return NULL;
00112 }
00113
00114 p = (struct astobj2 *) ((char *) user_data - sizeof(*p));
00115 if (AO2_MAGIC != (p->priv_data.magic) ) {
00116 ast_log(LOG_ERROR, "bad magic number 0x%x for %p\n", p->priv_data.magic, p);
00117 p = NULL;
00118 }
00119
00120 return p;
00121 }
00122
00123 enum ao2_callback_type {
00124 DEFAULT,
00125 WITH_DATA,
00126 };
00127
00128
00129
00130
00131
00132
00133 #define EXTERNAL_OBJ(_p) ((_p) == NULL ? NULL : (_p)->user_data)
00134
00135
00136
00137 static int __ao2_ref(void *user_data, const int delta);
00138 static struct ao2_container *__ao2_container_alloc(struct ao2_container *c, const uint n_buckets, ao2_hash_fn *hash_fn,
00139 ao2_callback_fn *cmp_fn);
00140 static struct bucket_list *__ao2_link(struct ao2_container *c, void *user_data, const char *file, int line, const char *func);
00141 static void *__ao2_callback(struct ao2_container *c,
00142 const enum search_flags flags, void *cb_fn, void *arg, void *data, enum ao2_callback_type type,
00143 char *tag, char *file, int line, const char *funcname);
00144 static void * __ao2_iterator_next(struct ao2_iterator *a, struct bucket_list **q);
00145
00146 #ifdef DEBUG_THREADS
00147
00148 #undef ao2_lock
00149 #undef ao2_trylock
00150 #undef ao2_unlock
00151 #endif
00152
00153 int ao2_lock(void *user_data)
00154 {
00155 struct astobj2 *p = INTERNAL_OBJ(user_data);
00156
00157 if (p == NULL)
00158 return -1;
00159
00160 #ifdef AO2_DEBUG
00161 ast_atomic_fetchadd_int(&ao2.total_locked, 1);
00162 #endif
00163
00164 return ast_mutex_lock(&p->priv_data.lock);
00165 }
00166
00167 int _ao2_lock(void *user_data, const char *file, const char *func, int line, const char *var)
00168 {
00169 struct astobj2 *p = INTERNAL_OBJ(user_data);
00170
00171 if (p == NULL)
00172 return -1;
00173
00174 #ifdef AO2_DEBUG
00175 ast_atomic_fetchadd_int(&ao2.total_locked, 1);
00176 #endif
00177
00178 #ifndef DEBUG_THREADS
00179 return ast_mutex_lock(&p->priv_data.lock);
00180 #else
00181 return __ast_pthread_mutex_lock(file, line, func, var, &p->priv_data.lock);
00182 #endif
00183 }
00184
00185 int ao2_unlock(void *user_data)
00186 {
00187 struct astobj2 *p = INTERNAL_OBJ(user_data);
00188
00189 if (p == NULL)
00190 return -1;
00191
00192 #ifdef AO2_DEBUG
00193 ast_atomic_fetchadd_int(&ao2.total_locked, -1);
00194 #endif
00195
00196 return ast_mutex_unlock(&p->priv_data.lock);
00197 }
00198
00199 int _ao2_unlock(void *user_data, const char *file, const char *func, int line, const char *var)
00200 {
00201 struct astobj2 *p = INTERNAL_OBJ(user_data);
00202
00203 if (p == NULL)
00204 return -1;
00205
00206 #ifdef AO2_DEBUG
00207 ast_atomic_fetchadd_int(&ao2.total_locked, -1);
00208 #endif
00209
00210 #ifndef DEBUG_THREADS
00211 return ast_mutex_unlock(&p->priv_data.lock);
00212 #else
00213 return __ast_pthread_mutex_unlock(file, line, func, var, &p->priv_data.lock);
00214 #endif
00215 }
00216
00217 int ao2_trylock(void *user_data)
00218 {
00219 struct astobj2 *p = INTERNAL_OBJ(user_data);
00220 int ret;
00221
00222 if (p == NULL)
00223 return -1;
00224 ret = ast_mutex_trylock(&p->priv_data.lock);
00225
00226 #ifdef AO2_DEBUG
00227 if (!ret)
00228 ast_atomic_fetchadd_int(&ao2.total_locked, 1);
00229 #endif
00230 return ret;
00231 }
00232
00233 int _ao2_trylock(void *user_data, const char *file, const char *func, int line, const char *var)
00234 {
00235 struct astobj2 *p = INTERNAL_OBJ(user_data);
00236 int ret;
00237
00238 if (p == NULL)
00239 return -1;
00240 #ifndef DEBUG_THREADS
00241 ret = ast_mutex_trylock(&p->priv_data.lock);
00242 #else
00243 ret = __ast_pthread_mutex_trylock(file, line, func, var, &p->priv_data.lock);
00244 #endif
00245
00246 #ifdef AO2_DEBUG
00247 if (!ret)
00248 ast_atomic_fetchadd_int(&ao2.total_locked, 1);
00249 #endif
00250 return ret;
00251 }
00252
00253 void *ao2_object_get_lockaddr(void *obj)
00254 {
00255 struct astobj2 *p = INTERNAL_OBJ(obj);
00256
00257 if (p == NULL)
00258 return NULL;
00259
00260 return &p->priv_data.lock;
00261 }
00262
00263
00264
00265
00266
00267
00268 int _ao2_ref_debug(void *user_data, const int delta, char *tag, char *file, int line, const char *funcname)
00269 {
00270 struct astobj2 *obj = INTERNAL_OBJ(user_data);
00271
00272 if (obj == NULL)
00273 return -1;
00274
00275 if (delta != 0) {
00276 FILE *refo = fopen(REF_FILE,"a");
00277 fprintf(refo, "%p %s%d %s:%d:%s (%s) [@%d]\n", user_data, (delta<0? "":"+"), delta, file, line, funcname, tag, obj->priv_data.ref_counter);
00278 fclose(refo);
00279 }
00280 if (obj->priv_data.ref_counter + delta == 0 && obj->priv_data.destructor_fn != NULL) {
00281 FILE *refo = fopen(REF_FILE,"a");
00282 fprintf(refo, "%p **call destructor** %s:%d:%s (%s)\n", user_data, file, line, funcname, tag);
00283 fclose(refo);
00284 }
00285 return __ao2_ref(user_data, delta);
00286 }
00287
00288 int _ao2_ref(void *user_data, const int delta)
00289 {
00290 struct astobj2 *obj = INTERNAL_OBJ(user_data);
00291
00292 if (obj == NULL)
00293 return -1;
00294
00295 return __ao2_ref(user_data, delta);
00296 }
00297
00298 static int __ao2_ref(void *user_data, const int delta)
00299 {
00300 struct astobj2 *obj = INTERNAL_OBJ(user_data);
00301 int current_value;
00302 int ret;
00303
00304 if (obj == NULL)
00305 return -1;
00306
00307
00308 if (delta == 0)
00309 return (obj->priv_data.ref_counter);
00310
00311
00312 ret = ast_atomic_fetchadd_int(&obj->priv_data.ref_counter, delta);
00313 current_value = ret + delta;
00314
00315 #ifdef AO2_DEBUG
00316 ast_atomic_fetchadd_int(&ao2.total_refs, delta);
00317 #endif
00318
00319
00320 if (current_value < 0)
00321 ast_log(LOG_ERROR, "refcount %d on object %p\n", current_value, user_data);
00322
00323 if (current_value <= 0) {
00324 if (obj->priv_data.destructor_fn != NULL) {
00325 obj->priv_data.destructor_fn(user_data);
00326 }
00327
00328 ast_mutex_destroy(&obj->priv_data.lock);
00329 #ifdef AO2_DEBUG
00330 ast_atomic_fetchadd_int(&ao2.total_mem, - obj->priv_data.data_size);
00331 ast_atomic_fetchadd_int(&ao2.total_objects, -1);
00332 #endif
00333
00334
00335
00336 memset(obj, '\0', sizeof(struct astobj2 *) + sizeof(void *) );
00337 free(obj);
00338 }
00339
00340 return ret;
00341 }
00342
00343
00344
00345
00346
00347 static void *__ao2_alloc(size_t data_size, ao2_destructor_fn destructor_fn, const char *file, int line, const char *funcname)
00348 {
00349
00350 struct astobj2 *obj;
00351
00352 if (data_size < sizeof(void *))
00353 data_size = sizeof(void *);
00354
00355 #if defined(__AST_DEBUG_MALLOC)
00356 obj = __ast_calloc(1, sizeof(*obj) + data_size, file, line, funcname);
00357 #else
00358 obj = ast_calloc(1, sizeof(*obj) + data_size);
00359 #endif
00360
00361 if (obj == NULL)
00362 return NULL;
00363
00364 ast_mutex_init(&obj->priv_data.lock);
00365 obj->priv_data.magic = AO2_MAGIC;
00366 obj->priv_data.data_size = data_size;
00367 obj->priv_data.ref_counter = 1;
00368 obj->priv_data.destructor_fn = destructor_fn;
00369
00370 #ifdef AO2_DEBUG
00371 ast_atomic_fetchadd_int(&ao2.total_objects, 1);
00372 ast_atomic_fetchadd_int(&ao2.total_mem, data_size);
00373 ast_atomic_fetchadd_int(&ao2.total_refs, 1);
00374 #endif
00375
00376
00377 return EXTERNAL_OBJ(obj);
00378 }
00379
00380 void *_ao2_alloc_debug(size_t data_size, ao2_destructor_fn destructor_fn, char *tag,
00381 const char *file, int line, const char *funcname, int ref_debug)
00382 {
00383
00384 void *obj;
00385 FILE *refo = ref_debug ? fopen(REF_FILE,"a") : NULL;
00386
00387 obj = __ao2_alloc(data_size, destructor_fn, file, line, funcname);
00388
00389 if (obj == NULL)
00390 return NULL;
00391
00392 if (refo) {
00393 fprintf(refo, "%p =1 %s:%d:%s (%s)\n", obj, file, line, funcname, tag);
00394 fclose(refo);
00395 }
00396
00397
00398 return obj;
00399 }
00400
00401 void *_ao2_alloc(size_t data_size, ao2_destructor_fn destructor_fn)
00402 {
00403 return __ao2_alloc(data_size, destructor_fn, __FILE__, __LINE__, __FUNCTION__);
00404 }
00405
00406
00407
00408 static void container_destruct(void *c);
00409
00410
00411 static void container_destruct_debug(void *c);
00412
00413
00414 AST_LIST_HEAD_NOLOCK(bucket, bucket_list);
00415
00416
00417
00418
00419
00420
00421
00422
00423
00424
00425
00426
00427
00428
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00432
00433
00434
00435
00436
00437
00438 struct ao2_container {
00439 ao2_hash_fn *hash_fn;
00440 ao2_callback_fn *cmp_fn;
00441 int n_buckets;
00442
00443 int elements;
00444
00445 int version;
00446
00447 struct bucket buckets[0];
00448 };
00449
00450
00451
00452
00453
00454
00455
00456
00457
00458
00459 static int hash_zero(const void *user_obj, const int flags)
00460 {
00461 return 0;
00462 }
00463
00464
00465
00466
00467 static struct ao2_container *__ao2_container_alloc(struct ao2_container *c, const unsigned int n_buckets, ao2_hash_fn *hash_fn,
00468 ao2_callback_fn *cmp_fn)
00469 {
00470
00471
00472
00473 if (!c)
00474 return NULL;
00475
00476 c->version = 1;
00477 c->n_buckets = n_buckets;
00478 c->hash_fn = hash_fn ? hash_fn : hash_zero;
00479 c->cmp_fn = cmp_fn;
00480
00481 #ifdef AO2_DEBUG
00482 ast_atomic_fetchadd_int(&ao2.total_containers, 1);
00483 #endif
00484
00485 return c;
00486 }
00487
00488 struct ao2_container *_ao2_container_alloc_debug(const unsigned int n_buckets, ao2_hash_fn *hash_fn,
00489 ao2_callback_fn *cmp_fn, char *tag, char *file, int line,
00490 const char *funcname, int ref_debug)
00491 {
00492
00493
00494 size_t container_size = sizeof(struct ao2_container) + n_buckets * sizeof(struct bucket);
00495 struct ao2_container *c = _ao2_alloc_debug(container_size, container_destruct_debug, tag, file, line, funcname, ref_debug);
00496
00497 return __ao2_container_alloc(c, n_buckets, hash_fn, cmp_fn);
00498 }
00499
00500 struct ao2_container *
00501 _ao2_container_alloc(const unsigned int n_buckets, ao2_hash_fn *hash_fn,
00502 ao2_callback_fn *cmp_fn)
00503 {
00504
00505
00506
00507 size_t container_size = sizeof(struct ao2_container) + n_buckets * sizeof(struct bucket);
00508 struct ao2_container *c = _ao2_alloc(container_size, container_destruct);
00509
00510 return __ao2_container_alloc(c, n_buckets, hash_fn, cmp_fn);
00511 }
00512
00513
00514
00515
00516 int ao2_container_count(struct ao2_container *c)
00517 {
00518 return c->elements;
00519 }
00520
00521
00522
00523
00524
00525
00526 struct bucket_list {
00527 AST_LIST_ENTRY(bucket_list) entry;
00528 int version;
00529 struct astobj2 *astobj;
00530 };
00531
00532
00533
00534
00535
00536 static struct bucket_list *__ao2_link(struct ao2_container *c, void *user_data, const char *file, int line, const char *func)
00537 {
00538 int i;
00539
00540 struct bucket_list *p;
00541 struct astobj2 *obj = INTERNAL_OBJ(user_data);
00542
00543 if (obj == NULL)
00544 return NULL;
00545
00546 if (INTERNAL_OBJ(c) == NULL)
00547 return NULL;
00548
00549 p = ast_calloc(1, sizeof(*p));
00550 if (!p)
00551 return NULL;
00552
00553 i = abs(c->hash_fn(user_data, OBJ_POINTER));
00554
00555 ao2_lock(c);
00556 i %= c->n_buckets;
00557 p->astobj = obj;
00558 p->version = ast_atomic_fetchadd_int(&c->version, 1);
00559 AST_LIST_INSERT_TAIL(&c->buckets[i], p, entry);
00560 ast_atomic_fetchadd_int(&c->elements, 1);
00561
00562
00563 return p;
00564 }
00565
00566 void *_ao2_link_debug(struct ao2_container *c, void *user_data, char *tag, char *file, int line, const char *funcname)
00567 {
00568 struct bucket_list *p = __ao2_link(c, user_data, file, line, funcname);
00569
00570 if (p) {
00571 _ao2_ref_debug(user_data, +1, tag, file, line, funcname);
00572 ao2_unlock(c);
00573 }
00574 return p;
00575 }
00576
00577 void *_ao2_link(struct ao2_container *c, void *user_data)
00578 {
00579 struct bucket_list *p = __ao2_link(c, user_data, __FILE__, __LINE__, __PRETTY_FUNCTION__);
00580
00581 if (p) {
00582 _ao2_ref(user_data, +1);
00583 ao2_unlock(c);
00584 }
00585 return p;
00586 }
00587
00588
00589
00590
00591 int ao2_match_by_addr(void *user_data, void *arg, int flags)
00592 {
00593 return (user_data == arg) ? (CMP_MATCH | CMP_STOP) : 0;
00594 }
00595
00596
00597
00598
00599
00600 void *_ao2_unlink_debug(struct ao2_container *c, void *user_data, char *tag,
00601 char *file, int line, const char *funcname)
00602 {
00603 if (INTERNAL_OBJ(user_data) == NULL)
00604 return NULL;
00605
00606 _ao2_callback_debug(c, OBJ_UNLINK | OBJ_POINTER | OBJ_NODATA, ao2_match_by_addr, user_data, tag, file, line, funcname);
00607
00608 return NULL;
00609 }
00610
00611 void *_ao2_unlink(struct ao2_container *c, void *user_data)
00612 {
00613 if (INTERNAL_OBJ(user_data) == NULL)
00614 return NULL;
00615
00616 _ao2_callback(c, OBJ_UNLINK | OBJ_POINTER | OBJ_NODATA, ao2_match_by_addr, user_data);
00617
00618 return NULL;
00619 }
00620
00621
00622
00623
00624 static int cb_true(void *user_data, void *arg, int flags)
00625 {
00626 return CMP_MATCH;
00627 }
00628
00629
00630
00631
00632 static int cb_true_data(void *user_data, void *arg, void *data, int flags)
00633 {
00634 return CMP_MATCH;
00635 }
00636
00637
00638
00639
00640
00641
00642
00643
00644
00645 static void *__ao2_callback(struct ao2_container *c,
00646 const enum search_flags flags, void *cb_fn, void *arg, void *data, enum ao2_callback_type type,
00647 char *tag, char *file, int line, const char *funcname)
00648 {
00649 int i, start, last;
00650 void *ret = NULL;
00651 ao2_callback_fn *cb_default = NULL;
00652 ao2_callback_data_fn *cb_withdata = NULL;
00653
00654 if (INTERNAL_OBJ(c) == NULL)
00655 return NULL;
00656
00657 if ((flags & (OBJ_MULTIPLE | OBJ_NODATA)) == OBJ_MULTIPLE) {
00658 ast_log(LOG_WARNING, "multiple data return not implemented yet (flags %x)\n", flags);
00659 return NULL;
00660 }
00661
00662
00663 if (cb_fn == NULL) {
00664 if (type == WITH_DATA) {
00665 cb_withdata = cb_true_data;
00666 } else {
00667 cb_default = cb_true;
00668 }
00669 } else {
00670
00671
00672 if (type == WITH_DATA) {
00673 cb_withdata = cb_fn;
00674 } else {
00675 cb_default = cb_fn;
00676 }
00677 }
00678
00679
00680
00681
00682
00683
00684
00685 if ((flags & OBJ_POINTER))
00686 start = i = c->hash_fn(arg, flags & OBJ_POINTER) % c->n_buckets;
00687 else
00688 start = i = -1;
00689
00690
00691 if (i < 0) {
00692 start = i = 0;
00693 last = c->n_buckets;
00694 } else if ((flags & OBJ_CONTINUE)) {
00695 last = c->n_buckets;
00696 } else {
00697 last = i + 1;
00698 }
00699
00700 ao2_lock(c);
00701
00702 for (; i < last ; i++) {
00703
00704 struct bucket_list *cur;
00705
00706 AST_LIST_TRAVERSE_SAFE_BEGIN(&c->buckets[i], cur, entry) {
00707 int match = (CMP_MATCH | CMP_STOP);
00708
00709 if (type == WITH_DATA) {
00710 match &= cb_withdata(EXTERNAL_OBJ(cur->astobj), arg, data, flags);
00711 } else {
00712 match &= cb_default(EXTERNAL_OBJ(cur->astobj), arg, flags);
00713 }
00714
00715
00716 if (match == 0) {
00717 continue;
00718 } else if (match == CMP_STOP) {
00719 i = last;
00720 break;
00721 }
00722
00723 if (!(flags & OBJ_NODATA)) {
00724
00725 ret = EXTERNAL_OBJ(cur->astobj);
00726 if (tag)
00727 _ao2_ref_debug(ret, 1, tag, file, line, funcname);
00728 else
00729 _ao2_ref(ret, 1);
00730 }
00731
00732 if (flags & OBJ_UNLINK) {
00733 struct bucket_list *x = cur;
00734
00735
00736 ast_atomic_fetchadd_int(&c->version, 1);
00737 AST_LIST_REMOVE_CURRENT(entry);
00738
00739 ast_atomic_fetchadd_int(&c->elements, -1);
00740 if (tag)
00741 _ao2_ref_debug(EXTERNAL_OBJ(x->astobj), -1, tag, file, line, funcname);
00742 else
00743 _ao2_ref(EXTERNAL_OBJ(x->astobj), -1);
00744 free(x);
00745 }
00746
00747 if ((match & CMP_STOP) || (flags & OBJ_MULTIPLE) == 0) {
00748
00749 i = last;
00750 break;
00751 }
00752 if (!(flags & OBJ_NODATA)) {
00753 #if 0
00754
00755
00756
00757
00758 #endif
00759 }
00760 }
00761 AST_LIST_TRAVERSE_SAFE_END;
00762
00763 if (ret) {
00764
00765 break;
00766 }
00767
00768 if (i == c->n_buckets - 1 && (flags & OBJ_POINTER) && (flags & OBJ_CONTINUE)) {
00769
00770 i = -1;
00771 last = start;
00772 }
00773 }
00774 ao2_unlock(c);
00775 return ret;
00776 }
00777
00778 void *_ao2_callback_debug(struct ao2_container *c,
00779 const enum search_flags flags,
00780 ao2_callback_fn *cb_fn, void *arg,
00781 char *tag, char *file, int line, const char *funcname)
00782 {
00783 return __ao2_callback(c,flags, cb_fn, arg, NULL, DEFAULT, tag, file, line, funcname);
00784 }
00785
00786 void *_ao2_callback(struct ao2_container *c, const enum search_flags flags,
00787 ao2_callback_fn *cb_fn, void *arg)
00788 {
00789 return __ao2_callback(c,flags, cb_fn, arg, NULL, DEFAULT, NULL, NULL, 0, NULL);
00790 }
00791
00792 void *_ao2_callback_data_debug(struct ao2_container *c,
00793 const enum search_flags flags,
00794 ao2_callback_data_fn *cb_fn, void *arg, void *data,
00795 char *tag, char *file, int line, const char *funcname)
00796 {
00797 return __ao2_callback(c, flags, cb_fn, arg, data, WITH_DATA, tag, file, line, funcname);
00798 }
00799
00800 void *_ao2_callback_data(struct ao2_container *c, const enum search_flags flags,
00801 ao2_callback_data_fn *cb_fn, void *arg, void *data)
00802 {
00803 return __ao2_callback(c, flags, cb_fn, arg, data, WITH_DATA, NULL, NULL, 0, NULL);
00804 }
00805
00806
00807
00808
00809 void *_ao2_find_debug(struct ao2_container *c, void *arg, enum search_flags flags, char *tag, char *file, int line, const char *funcname)
00810 {
00811 return _ao2_callback_debug(c, flags, c->cmp_fn, arg, tag, file, line, funcname);
00812 }
00813
00814 void *_ao2_find(struct ao2_container *c, void *arg, enum search_flags flags)
00815 {
00816 return _ao2_callback(c, flags, c->cmp_fn, arg);
00817 }
00818
00819
00820
00821
00822 struct ao2_iterator ao2_iterator_init(struct ao2_container *c, int flags)
00823 {
00824 struct ao2_iterator a = {
00825 .c = c,
00826 .flags = flags
00827 };
00828
00829 ao2_ref(c, +1);
00830
00831 return a;
00832 }
00833
00834
00835
00836
00837 void ao2_iterator_destroy(struct ao2_iterator *i)
00838 {
00839 ao2_ref(i->c, -1);
00840 i->c = NULL;
00841 }
00842
00843
00844
00845
00846 static void * __ao2_iterator_next(struct ao2_iterator *a, struct bucket_list **q)
00847 {
00848 int lim;
00849 struct bucket_list *p = NULL;
00850 void *ret = NULL;
00851
00852 *q = NULL;
00853
00854 if (INTERNAL_OBJ(a->c) == NULL)
00855 return NULL;
00856
00857 if (!(a->flags & AO2_ITERATOR_DONTLOCK))
00858 ao2_lock(a->c);
00859
00860
00861
00862
00863 if (a->c->version == a->c_version && (p = a->obj) ) {
00864 if ( (p = AST_LIST_NEXT(p, entry)) )
00865 goto found;
00866
00867 a->bucket++;
00868 a->version = 0;
00869 a->obj = NULL;
00870 }
00871
00872 lim = a->c->n_buckets;
00873
00874
00875
00876
00877
00878
00879
00880 for (; a->bucket < lim; a->bucket++, a->version = 0) {
00881
00882 AST_LIST_TRAVERSE(&a->c->buckets[a->bucket], p, entry) {
00883 if (p->version > a->version)
00884 goto found;
00885 }
00886 }
00887
00888 found:
00889 if (p) {
00890 a->version = p->version;
00891 a->obj = p;
00892 a->c_version = a->c->version;
00893 ret = EXTERNAL_OBJ(p->astobj);
00894
00895 *q = p;
00896 }
00897
00898 return ret;
00899 }
00900
00901 void * _ao2_iterator_next_debug(struct ao2_iterator *a, char *tag, char *file, int line, const char *funcname)
00902 {
00903 struct bucket_list *p;
00904 void *ret = NULL;
00905
00906 ret = __ao2_iterator_next(a, &p);
00907
00908 if (p) {
00909
00910 _ao2_ref_debug(ret, 1, tag, file, line, funcname);
00911 }
00912
00913 if (!(a->flags & AO2_ITERATOR_DONTLOCK))
00914 ao2_unlock(a->c);
00915
00916 return ret;
00917 }
00918
00919 void * _ao2_iterator_next(struct ao2_iterator *a)
00920 {
00921 struct bucket_list *p = NULL;
00922 void *ret = NULL;
00923
00924 ret = __ao2_iterator_next(a, &p);
00925
00926 if (p) {
00927
00928 _ao2_ref(ret, 1);
00929 }
00930
00931 if (!(a->flags & AO2_ITERATOR_DONTLOCK))
00932 ao2_unlock(a->c);
00933
00934 return ret;
00935 }
00936
00937
00938
00939
00940 static int cd_cb(void *obj, void *arg, int flag)
00941 {
00942 _ao2_ref(obj, -1);
00943 return 0;
00944 }
00945
00946 static int cd_cb_debug(void *obj, void *arg, int flag)
00947 {
00948 _ao2_ref_debug(obj, -1, "deref object via container destroy", __FILE__, __LINE__, __PRETTY_FUNCTION__);
00949 return 0;
00950 }
00951
00952 static void container_destruct(void *_c)
00953 {
00954 struct ao2_container *c = _c;
00955 int i;
00956
00957 _ao2_callback(c, OBJ_UNLINK, cd_cb, NULL);
00958
00959 for (i = 0; i < c->n_buckets; i++) {
00960 struct bucket_list *current;
00961
00962 while ((current = AST_LIST_REMOVE_HEAD(&c->buckets[i], entry))) {
00963 ast_free(current);
00964 }
00965 }
00966
00967 #ifdef AO2_DEBUG
00968 ast_atomic_fetchadd_int(&ao2.total_containers, -1);
00969 #endif
00970 }
00971
00972 static void container_destruct_debug(void *_c)
00973 {
00974 struct ao2_container *c = _c;
00975 int i;
00976
00977 _ao2_callback_debug(c, OBJ_UNLINK, cd_cb_debug, NULL, "container_destruct_debug called", __FILE__, __LINE__, __PRETTY_FUNCTION__);
00978
00979 for (i = 0; i < c->n_buckets; i++) {
00980 struct bucket_list *current;
00981
00982 while ((current = AST_LIST_REMOVE_HEAD(&c->buckets[i], entry))) {
00983 ast_free(current);
00984 }
00985 }
00986
00987 #ifdef AO2_DEBUG
00988 ast_atomic_fetchadd_int(&ao2.total_containers, -1);
00989 #endif
00990 }
00991
00992 #ifdef AO2_DEBUG
00993 static int print_cb(void *obj, void *arg, int flag)
00994 {
00995 int *fd = arg;
00996 char *s = (char *)obj;
00997
00998 ast_cli(*fd, "string <%s>\n", s);
00999 return 0;
01000 }
01001
01002
01003
01004
01005 static char *handle_astobj2_stats(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
01006 {
01007 switch (cmd) {
01008 case CLI_INIT:
01009 e->command = "astobj2 show stats";
01010 e->usage = "Usage: astobj2 show stats\n"
01011 " Show astobj2 show stats\n";
01012 return NULL;
01013 case CLI_GENERATE:
01014 return NULL;
01015 }
01016 ast_cli(a->fd, "Objects : %d\n", ao2.total_objects);
01017 ast_cli(a->fd, "Containers : %d\n", ao2.total_containers);
01018 ast_cli(a->fd, "Memory : %d\n", ao2.total_mem);
01019 ast_cli(a->fd, "Locked : %d\n", ao2.total_locked);
01020 ast_cli(a->fd, "Refs : %d\n", ao2.total_refs);
01021 return CLI_SUCCESS;
01022 }
01023
01024
01025
01026
01027 static char *handle_astobj2_test(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
01028 {
01029 struct ao2_container *c1;
01030 int i, lim;
01031 char *obj;
01032 static int prof_id = -1;
01033 struct ast_cli_args fake_args = { a->fd, 0, NULL };
01034
01035 switch (cmd) {
01036 case CLI_INIT:
01037 e->command = "astobj2 test";
01038 e->usage = "Usage: astobj2 test <num>\n"
01039 " Runs astobj2 test. Creates 'num' objects,\n"
01040 " and test iterators, callbacks and may be other stuff\n";
01041 return NULL;
01042 case CLI_GENERATE:
01043 return NULL;
01044 }
01045
01046 if (a->argc != 3) {
01047 return CLI_SHOWUSAGE;
01048 }
01049
01050 if (prof_id == -1)
01051 prof_id = ast_add_profile("ao2_alloc", 0);
01052
01053 ast_cli(a->fd, "argc %d argv %s %s %s\n", a->argc, a->argv[0], a->argv[1], a->argv[2]);
01054 lim = atoi(a->argv[2]);
01055 ast_cli(a->fd, "called astobj_test\n");
01056
01057 handle_astobj2_stats(e, CLI_HANDLER, &fake_args);
01058
01059
01060
01061
01062 c1 = ao2_t_container_alloc(100, NULL , NULL ,"test");
01063 ast_cli(a->fd, "container allocated as %p\n", c1);
01064
01065
01066
01067
01068
01069
01070 for (i = 0; i < lim; i++) {
01071 ast_mark(prof_id, 1 );
01072 obj = ao2_t_alloc(80, NULL,"test");
01073 ast_mark(prof_id, 0 );
01074 ast_cli(a->fd, "object %d allocated as %p\n", i, obj);
01075 sprintf(obj, "-- this is obj %d --", i);
01076 ao2_link(c1, obj);
01077
01078
01079
01080
01081
01082 ao2_t_ref(obj, -1, "test");
01083 }
01084 ast_cli(a->fd, "testing callbacks\n");
01085 ao2_t_callback(c1, 0, print_cb, &a->fd, "test callback");
01086 ast_cli(a->fd, "testing iterators, remove every second object\n");
01087 {
01088 struct ao2_iterator ai;
01089 int x = 0;
01090
01091 ai = ao2_iterator_init(c1, 0);
01092 while ( (obj = ao2_t_iterator_next(&ai,"test")) ) {
01093 ast_cli(a->fd, "iterator on <%s>\n", obj);
01094 if (x++ & 1)
01095 ao2_t_unlink(c1, obj,"test");
01096 ao2_t_ref(obj, -1,"test");
01097 }
01098 ao2_iterator_destroy(&ai);
01099 ast_cli(a->fd, "testing iterators again\n");
01100 ai = ao2_iterator_init(c1, 0);
01101 while ( (obj = ao2_t_iterator_next(&ai,"test")) ) {
01102 ast_cli(a->fd, "iterator on <%s>\n", obj);
01103 ao2_t_ref(obj, -1,"test");
01104 }
01105 ao2_iterator_destroy(&ai);
01106 }
01107 ast_cli(a->fd, "testing callbacks again\n");
01108 ao2_t_callback(c1, 0, print_cb, &a->fd, "test callback");
01109
01110 ast_verbose("now you should see an error message:\n");
01111 ao2_t_ref(&i, -1, "");
01112
01113 ast_cli(a->fd, "destroy container\n");
01114 ao2_t_ref(c1, -1, "");
01115 handle_astobj2_stats(e, CLI_HANDLER, &fake_args);
01116 return CLI_SUCCESS;
01117 }
01118
01119 static struct ast_cli_entry cli_astobj2[] = {
01120 AST_CLI_DEFINE(handle_astobj2_stats, "Print astobj2 statistics"),
01121 AST_CLI_DEFINE(handle_astobj2_test, "Test astobj2"),
01122 };
01123 #endif
01124
01125 int astobj2_init(void)
01126 {
01127 #ifdef AO2_DEBUG
01128 ast_cli_register_multiple(cli_astobj2, ARRAY_LEN(cli_astobj2));
01129 #endif
01130
01131 return 0;
01132 }