service/notification/src/provider/NSProviderMemoryCache.c

   1 //******************************************************************\r
   2 //\r
   3 // Copyright 2016 Samsung Electronics All Rights Reserved.\r
   4 //\r
   5 //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=\r
   6 //\r
   7 // Licensed under the Apache License, Version 2.0 (the "License");\r
   8 // you may not use this file except in compliance with the License.\r
   9 // You may obtain a copy of the License at\r
  10 //\r
  11 //      http://www.apache.org/licenses/LICENSE-2.0\r
  12 //\r
  13 // Unless required by applicable law or agreed to in writing, software\r
  14 // distributed under the License is distributed on an "AS IS" BASIS,\r
  15 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
  16 // See the License for the specific language governing permissions and\r
  17 // limitations under the License.\r
  18 //\r
  19 //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=\r
  20 \r
  21 #include "NSProviderMemoryCache.h"\r
  22 #include <string.h>\r
  23 \r
  24 NSCacheList * NSStorageCreate()\r
  25 {\r
  26     pthread_mutex_lock(&NSCacheMutex);\r
  27     NSCacheList * newList = (NSCacheList *) OICMalloc(sizeof(NSCacheList));\r
  28     if (!newList)\r
  29     {\r
  30         pthread_mutex_unlock(&NSCacheMutex);\r
  31         return NULL;\r
  32     }\r
  33 \r
  34     newList->head = newList->tail = NULL;\r
  35 \r
  36     pthread_mutex_unlock(&NSCacheMutex);\r
  37     NS_LOG(DEBUG, "NSCacheCreate");\r
  38 \r
  39     return newList;\r
  40 }\r
  41 \r
  42 NSCacheElement * NSStorageRead(NSCacheList * list, const char * findId)\r
  43 {\r
  44     pthread_mutex_lock(&NSCacheMutex);\r
  45 \r
  46     NS_LOG(DEBUG, "NSCacheRead - IN");\r
  47 \r
  48     NSCacheElement * iter = list->head;\r
  49     NSCacheElement * next = NULL;\r
  50     NSCacheType type = list->cacheType;\r
  51 \r
  52     NS_LOG_V(DEBUG, "Find ID - %s", findId);\r
  53 \r
  54     while (iter)\r
  55     {\r
  56         next = iter->next;\r
  57 \r
  58         if (NSProviderCompareIdCacheData(type, iter->data, findId))\r
  59         {\r
  60             NS_LOG(DEBUG, "Found in Cache");\r
  61             pthread_mutex_unlock(&NSCacheMutex);\r
  62             return iter;\r
  63         }\r
  64 \r
  65         iter = next;\r
  66     }\r
  67 \r
  68     NS_LOG(DEBUG, "Not found in Cache");\r
  69     NS_LOG(DEBUG, "NSCacheRead - OUT");\r
  70     pthread_mutex_unlock(&NSCacheMutex);\r
  71 \r
  72     return NULL;\r
  73 }\r
  74 \r
  75 NSResult NSCacheUpdateSubScriptionState(NSCacheList * list, char * id, bool state)\r
  76 {\r
  77     pthread_mutex_lock(&NSCacheMutex);\r
  78 \r
  79     NS_LOG(DEBUG, "NSCacheUpdateSubScriptionState - IN");\r
  80 \r
  81     if (id == NULL)\r
  82     {\r
  83         NS_LOG(DEBUG, "id is NULL");\r
  84         pthread_mutex_unlock(&NSCacheMutex);\r
  85         return NS_ERROR;\r
  86     }\r
  87 \r
  88     NSCacheElement * it = NSStorageRead(list, id);\r
  89 \r
  90     if (it)\r
  91     {\r
  92         NSCacheSubData * itData = (NSCacheSubData *) it->data;\r
  93         if (strcmp(itData->id, id) == 0)\r
  94         {\r
  95             NS_LOG(DEBUG, "Update Data - IN");\r
  96 \r
  97             NS_LOG_V(DEBUG, "currData_ID = %s", itData->id);\r
  98             NS_LOG_V(DEBUG, "currData_MsgObID = %d", itData->messageObId);\r
  99             NS_LOG_V(DEBUG, "currData_SyncObID = %d", itData->syncObId);\r
 100             NS_LOG_V(DEBUG, "currData_Cloud_MsgObID = %d", itData->remote_messageObId);\r
 101             NS_LOG_V(DEBUG, "currData_Cloud_SyncObID = %d", itData->remote_syncObId);\r
 102             NS_LOG_V(DEBUG, "currData_IsWhite = %d", itData->isWhite);\r
 103 \r
 104             NS_LOG_V(DEBUG, "update state = %d", state);\r
 105 \r
 106             itData->isWhite = state;\r
 107 \r
 108             NS_LOG(DEBUG, "Update Data - OUT");\r
 109             pthread_mutex_unlock(&NSCacheMutex);\r
 110             return NS_OK;\r
 111         }\r
 112     }\r
 113     else\r
 114     {\r
 115         NS_LOG(DEBUG, "Not Found Data");\r
 116     }\r
 117 \r
 118     NS_LOG(DEBUG, "NSCacheUpdateSubScriptionState - OUT");\r
 119     pthread_mutex_unlock(&NSCacheMutex);\r
 120     return NS_ERROR;\r
 121 }\r
 122 \r
 123 NSResult NSStorageWrite(NSCacheList * list, NSCacheElement * newObj)\r
 124 {\r
 125     pthread_mutex_lock(&NSCacheMutex);\r
 126 \r
 127     NSCacheType type = list->cacheType;\r
 128 \r
 129     NS_LOG(DEBUG, "NSCacheWrite - IN");\r
 130 \r
 131     if (newObj == NULL)\r
 132     {\r
 133         NS_LOG(DEBUG, "newObj is NULL - IN");\r
 134         pthread_mutex_unlock(&NSCacheMutex);\r
 135         return NS_ERROR;\r
 136     }\r
 137 \r
 138     if (type == NS_PROVIDER_CACHE_SUBSCRIBER)\r
 139     {\r
 140         NS_LOG(DEBUG, "Type is SUBSCRIBER");\r
 141 \r
 142         NSCacheSubData * subData = (NSCacheSubData *) newObj->data;\r
 143         NSCacheElement * it = NSStorageRead(list, subData->id);\r
 144 \r
 145         if (it)\r
 146         {\r
 147             NSCacheSubData * itData = (NSCacheSubData *) it->data;\r
 148 \r
 149             if (strcmp(itData->id, subData->id) == 0)\r
 150             {\r
 151                 NS_LOG(DEBUG, "Update Data - IN");\r
 152 \r
 153                 NS_LOG_V(DEBUG, "currData_ID = %s", itData->id);\r
 154                 NS_LOG_V(DEBUG, "currData_MsgObID = %d", itData->messageObId);\r
 155                 NS_LOG_V(DEBUG, "currData_SyncObID = %d", itData->syncObId);\r
 156                 NS_LOG_V(DEBUG, "currData_Cloud_MsgObID = %d", itData->remote_messageObId);\r
 157                 NS_LOG_V(DEBUG, "currData_Cloud_SyncObID = %d", itData->remote_syncObId);\r
 158                 NS_LOG_V(DEBUG, "currData_IsWhite = %d", itData->isWhite);\r
 159 \r
 160                 NS_LOG_V(DEBUG, "subData_ID = %s", subData->id);\r
 161                 NS_LOG_V(DEBUG, "subData_MsgObID = %d", subData->messageObId);\r
 162                 NS_LOG_V(DEBUG, "subData_SyncObID = %d", subData->syncObId);\r
 163                 NS_LOG_V(DEBUG, "subData_Cloud_MsgObID = %d", subData->remote_messageObId);\r
 164                 NS_LOG_V(DEBUG, "subData_Cloud_SyncObID = %d", subData->remote_syncObId);\r
 165                 NS_LOG_V(DEBUG, "subData_IsWhite = %d", subData->isWhite);\r
 166 \r
 167                 if (subData->messageObId != 0)\r
 168                 {\r
 169                     itData->messageObId = subData->messageObId;\r
 170                 }\r
 171 \r
 172                 if (subData->syncObId != 0)\r
 173                 {\r
 174                     itData->syncObId = subData->syncObId;\r
 175                 }\r
 176 \r
 177                 if (subData->remote_messageObId != 0)\r
 178                 {\r
 179                     itData->remote_messageObId = subData->remote_messageObId;\r
 180                 }\r
 181 \r
 182                 if (subData->remote_syncObId != 0)\r
 183                 {\r
 184                     itData->remote_syncObId = subData->remote_syncObId;\r
 185                     NS_LOG_V(DEBUG, "sync id cached: %d", itData->remote_syncObId);\r
 186                 }\r
 187 \r
 188                 NS_LOG(DEBUG, "Update Data - OUT");\r
 189 \r
 190                 pthread_mutex_unlock(&NSCacheMutex);\r
 191                 return NS_OK;\r
 192             }\r
 193         }\r
 194 \r
 195     }\r
 196     else if(type == NS_PROVIDER_CACHE_REGISTER_TOPIC)\r
 197     {\r
 198         NS_LOG(DEBUG, "Type is REGITSTER TOPIC");\r
 199 \r
 200         NSCacheTopicData * topicData = (NSCacheTopicData *) newObj->data;\r
 201         NSCacheElement * it = NSStorageRead(list, topicData->topicName);\r
 202 \r
 203         if (it)\r
 204         {\r
 205             NS_LOG(DEBUG, "already registered for topic name");\r
 206             pthread_mutex_unlock(&NSCacheMutex);\r
 207             return NS_FAIL;\r
 208         }\r
 209     }\r
 210     else if(type == NS_PROVIDER_CACHE_CONSUMER_TOPIC_NAME)\r
 211     {\r
 212         NS_LOG(DEBUG, "Type is REGITSTER TOPIC");\r
 213 \r
 214         NSCacheTopicSubData * topicData = (NSCacheTopicSubData *) newObj->data;\r
 215         NSCacheElement * it = NSStorageRead(list, topicData->topicName);\r
 216 \r
 217         if (it)\r
 218         {\r
 219             NS_LOG(DEBUG, "already registered for topic name");\r
 220             pthread_mutex_unlock(&NSCacheMutex);\r
 221             return NS_FAIL;\r
 222         }\r
 223     }\r
 224     else if(type == NS_PROVIDER_CACHE_CONSUMER_TOPIC_CID)\r
 225     {\r
 226         NS_LOG(DEBUG, "Type is REGITSTER TOPIC");\r
 227 \r
 228         NSCacheTopicSubData * topicData = (NSCacheTopicSubData *) newObj->data;\r
 229         NSCacheElement * it = NSStorageRead(list, topicData->id);\r
 230 \r
 231         if (it)\r
 232         {\r
 233             NS_LOG(DEBUG, "already registered for topic name");\r
 234             pthread_mutex_unlock(&NSCacheMutex);\r
 235             return NS_FAIL;\r
 236         }\r
 237     }\r
 238 \r
 239     if (list->head == NULL)\r
 240     {\r
 241         NS_LOG(DEBUG, "list->head is NULL, Insert First Data");\r
 242         list->head = list->tail = newObj;\r
 243         pthread_mutex_unlock(&NSCacheMutex);\r
 244         return NS_OK;\r
 245     }\r
 246 \r
 247     list->tail = list->tail->next = newObj;\r
 248     NS_LOG(DEBUG, "list->head is not NULL");\r
 249     pthread_mutex_unlock(&NSCacheMutex);\r
 250     return NS_OK;\r
 251 }\r
 252 \r
 253 NSResult NSStorageDestroy(NSCacheList * list)\r
 254 {\r
 255     NSCacheElement * iter = list->head;\r
 256     NSCacheElement * next = NULL;\r
 257     NSCacheType type = list->cacheType;\r
 258 \r
 259     while (iter)\r
 260     {\r
 261         next = (NSCacheElement *) iter->next;\r
 262         NSProviderDeleteCacheData(type, iter->data);\r
 263         OICFree(iter);\r
 264         iter = next;\r
 265     }\r
 266 \r
 267     OICFree(list);\r
 268     return NS_OK;\r
 269 }\r
 270 \r
 271 \r
 272 bool NSIsSameObId(NSCacheSubData * data, OCObservationId id)\r
 273 {\r
 274     if (id == data->messageObId || id == data->syncObId || id == data->remote_messageObId ||\r
 275                 id == data->remote_syncObId)\r
 276     {\r
 277         return true;\r
 278     }\r
 279 \r
 280     return false;\r
 281 }\r
 282 \r
 283 bool NSProviderCompareIdCacheData(NSCacheType type, void * data, const char * id)\r
 284 {\r
 285     NS_LOG(DEBUG, "NSProviderCompareIdCacheData - IN");\r
 286 \r
 287     if (data == NULL)\r
 288     {\r
 289         return false;\r
 290     }\r
 291 \r
 292     NS_LOG_V(DEBUG, "Data(compData) = [%s]", id);\r
 293 \r
 294     if (type == NS_PROVIDER_CACHE_SUBSCRIBER)\r
 295     {\r
 296         NSCacheSubData * subData = (NSCacheSubData *) data;\r
 297 \r
 298         NS_LOG_V(DEBUG, "Data(subData) = [%s]", subData->id);\r
 299 \r
 300         if (strcmp(subData->id, id) == 0)\r
 301         {\r
 302             NS_LOG(DEBUG, "SubData is Same");\r
 303             return true;\r
 304         }\r
 305 \r
 306         NS_LOG(DEBUG, "Message Data is Not Same");\r
 307         return false;\r
 308     }\r
 309     else if (type == NS_PROVIDER_CACHE_SUBSCRIBER_OBSERVE_ID)\r
 310     {\r
 311         NSCacheSubData * subData = (NSCacheSubData *) data;\r
 312 \r
 313         NS_LOG_V(DEBUG, "Data(subData) = [%s]", subData->id);\r
 314 \r
 315         OCObservationId currID = *id;\r
 316 \r
 317         if (NSIsSameObId(subData, currID))\r
 318         {\r
 319             NS_LOG(DEBUG, "SubData is Same");\r
 320             return true;\r
 321         }\r
 322 \r
 323         NS_LOG(DEBUG, "Message Data is Not Same");\r
 324         return false;\r
 325     }\r
 326     else if (type == NS_PROVIDER_CACHE_REGISTER_TOPIC)\r
 327     {\r
 328         NSCacheTopicData * topicData = (NSCacheTopicData *) data;\r
 329 \r
 330         NS_LOG_V(DEBUG, "Data(topicData) = [%s]", topicData->topicName);\r
 331 \r
 332         if (strcmp(topicData->topicName, id) == 0)\r
 333         {\r
 334             NS_LOG(DEBUG, "SubData is Same");\r
 335             return true;\r
 336         }\r
 337 \r
 338         NS_LOG(DEBUG, "Message Data is Not Same");\r
 339         return false;\r
 340     }\r
 341     else if (type == NS_PROVIDER_CACHE_CONSUMER_TOPIC_NAME)\r
 342     {\r
 343         NSCacheTopicSubData * topicData = (NSCacheTopicSubData *) data;\r
 344 \r
 345         NS_LOG_V(DEBUG, "Data(topicData) = [%s]", topicData->topicName);\r
 346 \r
 347         if (strcmp(topicData->topicName, id) == 0)\r
 348         {\r
 349             NS_LOG(DEBUG, "SubData is Same");\r
 350             return true;\r
 351         }\r
 352 \r
 353         NS_LOG(DEBUG, "Message Data is Not Same");\r
 354         return false;\r
 355     }\r
 356     else if (type == NS_PROVIDER_CACHE_CONSUMER_TOPIC_CID)\r
 357     {\r
 358         NSCacheTopicSubData * topicData = (NSCacheTopicSubData *) data;\r
 359 \r
 360         NS_LOG_V(DEBUG, "Data(topicData) = [%s]", topicData->id);\r
 361 \r
 362         if (strcmp(topicData->id, id) == 0)\r
 363         {\r
 364             NS_LOG(DEBUG, "SubData is Same");\r
 365             return true;\r
 366         }\r
 367 \r
 368         NS_LOG(DEBUG, "Message Data is Not Same");\r
 369         return false;\r
 370     }\r
 371 \r
 372 \r
 373     NS_LOG(DEBUG, "NSProviderCompareIdCacheData - OUT");\r
 374     return false;\r
 375 }\r
 376 \r
 377 NSResult NSProviderDeleteCacheData(NSCacheType type, void * data)\r
 378 {\r
 379     if (!data)\r
 380     {\r
 381         return NS_ERROR;\r
 382     }\r
 383 \r
 384     if (type == NS_PROVIDER_CACHE_SUBSCRIBER || type == NS_PROVIDER_CACHE_SUBSCRIBER_OBSERVE_ID)\r
 385     {\r
 386         NSCacheSubData * subData = (NSCacheSubData *) data;\r
 387 \r
 388         (subData->id)[0] = '\0';\r
 389         OICFree(subData);\r
 390         return NS_OK;\r
 391     }\r
 392     else if(type == NS_PROVIDER_CACHE_REGISTER_TOPIC)\r
 393     {\r
 394 \r
 395         NSCacheTopicData * topicData = (NSCacheTopicData *) data;\r
 396         NS_LOG_V(DEBUG, "topicData->topicName = %s, topicData->state = %d", topicData->topicName,\r
 397                 (int)topicData->state);\r
 398 \r
 399         OICFree(topicData->topicName);\r
 400     }\r
 401     else if(type == NS_PROVIDER_CACHE_CONSUMER_TOPIC_NAME ||\r
 402             type == NS_PROVIDER_CACHE_CONSUMER_TOPIC_CID)\r
 403     {\r
 404         NSCacheTopicSubData * topicData = (NSCacheTopicSubData *) data;\r
 405         OICFree(topicData->topicName);\r
 406     }\r
 407 \r
 408     return NS_OK;\r
 409 }\r
 410 \r
 411 NSResult NSStorageDelete(NSCacheList * list, const char * delId)\r
 412 {\r
 413     pthread_mutex_lock(&NSCacheMutex);\r
 414     NSCacheElement * prev = list->head;\r
 415     NSCacheElement * del = list->head;\r
 416 \r
 417     NSCacheType type = list->cacheType;\r
 418 \r
 419     if(!del)\r
 420     {\r
 421         NS_LOG(DEBUG, "list head is NULL");\r
 422         return NS_FAIL;\r
 423     }\r
 424 \r
 425     if (NSProviderCompareIdCacheData(type, del->data, delId))\r
 426     {\r
 427         if (del == list->head) // first object\r
 428         {\r
 429             if (del == list->tail) // first object (one object)\r
 430             {\r
 431                 list->tail = del->next;\r
 432             }\r
 433 \r
 434             list->head = del->next;\r
 435             NSProviderDeleteCacheData(type, del->data);\r
 436             OICFree(del);\r
 437             pthread_mutex_unlock(&NSCacheMutex);\r
 438             return NS_OK;\r
 439         }\r
 440     }\r
 441 \r
 442     del = del->next;\r
 443     while (del)\r
 444     {\r
 445         if (NSProviderCompareIdCacheData(type, del->data, delId))\r
 446         {\r
 447             if (del == list->tail) // delete object same to last object\r
 448             {\r
 449                 list->tail = prev;\r
 450             }\r
 451 \r
 452             prev->next = del->next;\r
 453             NSProviderDeleteCacheData(type, del->data);\r
 454             OICFree(del);\r
 455             pthread_mutex_unlock(&NSCacheMutex);\r
 456             return NS_OK;\r
 457         }\r
 458 \r
 459         prev = del;\r
 460         del = del->next;\r
 461     }\r
 462     pthread_mutex_unlock(&NSCacheMutex);\r
 463     return NS_FAIL;\r
 464 }\r
 465 \r
 466 NSTopicLL * NSProviderGetTopicsCacheData(NSCacheList * regTopicList)\r
 467 {\r
 468     NS_LOG(DEBUG, "NSProviderGetTopicsCache - IN");\r
 469     pthread_mutex_lock(&NSCacheMutex);\r
 470 \r
 471     NSCacheElement * iter = regTopicList->head;\r
 472 \r
 473     if(!iter)\r
 474     {\r
 475         pthread_mutex_unlock(&NSCacheMutex);\r
 476         return NULL;\r
 477     }\r
 478 \r
 479     NSTopicLL * iterTopic = NULL;\r
 480     NSTopicLL * newTopic = NULL;\r
 481     NSTopicLL * topics = NULL;\r
 482 \r
 483     while (iter)\r
 484     {\r
 485         NSCacheTopicData * curr = (NSCacheTopicData *) iter->data;\r
 486 \r
 487         newTopic = (NSTopicLL *) OICMalloc(sizeof(NSTopicLL));\r
 488         newTopic->state = curr->state;\r
 489         newTopic->next = NULL;\r
 490         newTopic->topicName = OICStrdup(curr->topicName);\r
 491 \r
 492         if(!topics)\r
 493         {\r
 494             iterTopic = topics = newTopic;\r
 495         }\r
 496         else\r
 497         {\r
 498             iterTopic->next = newTopic;\r
 499             iterTopic = newTopic;\r
 500         }\r
 501 \r
 502         iter = iter->next;\r
 503     }\r
 504 \r
 505     pthread_mutex_unlock(&NSCacheMutex);\r
 506     NS_LOG(DEBUG, "NSProviderGetTopicsCache - OUT");\r
 507 \r
 508     return topics;\r
 509 }\r
 510 \r
 511 NSTopicLL * NSProviderGetConsumerTopicsCacheData(NSCacheList * regTopicList,\r
 512         NSCacheList * conTopicList, char *consumerId)\r
 513 {\r
 514     NS_LOG(DEBUG, "NSProviderGetConsumerTopicsCacheData - IN");\r
 515 \r
 516     pthread_mutex_lock(&NSCacheMutex);\r
 517     NSTopicLL * topics = NSProviderGetTopicsCacheData(regTopicList);\r
 518 \r
 519     if(!topics)\r
 520     {\r
 521         pthread_mutex_unlock(&NSCacheMutex);\r
 522         return NULL;\r
 523     }\r
 524 \r
 525     NSCacheElement * iter = conTopicList->head;\r
 526     conTopicList->cacheType = NS_PROVIDER_CACHE_CONSUMER_TOPIC_CID;\r
 527 \r
 528     while(iter)\r
 529     {\r
 530         NSCacheTopicSubData * curr = (NSCacheTopicSubData *)iter->data;\r
 531 \r
 532         NS_LOG_V(DEBUG, "curr->id = %s", curr->id);\r
 533         NS_LOG_V(DEBUG, "curr->topicName = %s", curr->topicName);\r
 534 \r
 535         if(curr && strcmp(curr->id, consumerId) == 0)\r
 536         {\r
 537             NSTopicLL * topicIter = topics;\r
 538             while(topicIter)\r
 539             {\r
 540                 if(strcmp(topicIter->topicName, curr->topicName) == 0)\r
 541                 {\r
 542                     topicIter->state = NS_TOPIC_SUBSCRIBED;\r
 543                     break;\r
 544                 }\r
 545                 topicIter = topicIter->next;\r
 546             }\r
 547         }\r
 548 \r
 549         iter = iter->next;\r
 550     }\r
 551 \r
 552     conTopicList->cacheType = NS_PROVIDER_CACHE_CONSUMER_TOPIC_NAME;\r
 553     pthread_mutex_unlock(&NSCacheMutex);\r
 554     NS_LOG(DEBUG, "NSProviderGetConsumerTopics - OUT");\r
 555 \r
 556     return topics;\r
 557 }\r
 558 \r
 559 size_t NSProviderGetListSize(NSCacheElement * firstElement)\r
 560 {\r
 561     pthread_mutex_lock(&NSCacheMutex);\r
 562     if(!firstElement)\r
 563     {\r
 564         pthread_mutex_unlock(&NSCacheMutex);\r
 565         return 0;\r
 566     }\r
 567 \r
 568     int cnt = 0;\r
 569 \r
 570     NSCacheElement * iter = firstElement;\r
 571 \r
 572     while(iter)\r
 573     {\r
 574         cnt++;\r
 575         iter = iter->next;\r
 576     }\r
 577 \r
 578     pthread_mutex_unlock(&NSCacheMutex);\r
 579     return cnt;\r
 580 }\r
 581 \r
 582 bool NSProviderIsTopicSubScribed(NSCacheElement * conTopicList, char * cId, char * topicName)\r
 583 {\r
 584     pthread_mutex_lock(&NSCacheMutex);\r
 585 \r
 586     if(!conTopicList || !cId || !topicName)\r
 587     {\r
 588         pthread_mutex_unlock(&NSCacheMutex);\r
 589         return false;\r
 590     }\r
 591 \r
 592     NSCacheElement * iter = conTopicList;\r
 593     while(iter)\r
 594     {\r
 595         NSCacheTopicSubData * curr = (NSCacheTopicSubData *) iter->data;\r
 596 \r
 597         if( (strcmp(curr->id, cId) == 0) && (strcmp(curr->topicName, topicName) == 0) )\r
 598         {\r
 599             pthread_mutex_unlock(&NSCacheMutex);\r
 600             return true;\r
 601         }\r
 602         iter = iter->next;\r
 603     }\r
 604 \r
 605     pthread_mutex_unlock(&NSCacheMutex);\r
 606     return false;\r
 607 }\r
 608 \r
 609 NSResult NSProviderDeleteConsumerTopic(NSCacheList * conTopicList,\r
 610         NSCacheTopicSubData * topicSubData)\r
 611 {\r
 612     pthread_mutex_lock(&NSCacheMutex);\r
 613 \r
 614     char * cId = topicSubData->id;\r
 615     char * topicName = topicSubData->topicName;\r
 616 \r
 617     if(!conTopicList || !cId || !topicName)\r
 618     {\r
 619         return NS_ERROR;\r
 620         pthread_mutex_unlock(&NSCacheMutex);\r
 621     }\r
 622 \r
 623     NSCacheElement * prev = conTopicList->head;\r
 624     NSCacheElement * del = conTopicList->head;\r
 625 \r
 626     NSCacheType type = conTopicList->cacheType;\r
 627 \r
 628     if(!del)\r
 629     {\r
 630         NS_LOG(DEBUG, "list head is NULL");\r
 631         return NS_FAIL;\r
 632     }\r
 633 \r
 634     NSCacheTopicSubData * curr = (NSCacheTopicSubData *) del->data;\r
 635     NS_LOG_V(DEBUG, "compareid = %s", cId);\r
 636     NS_LOG_V(DEBUG, "comparetopicName = %s", topicName);\r
 637     NS_LOG_V(DEBUG, "curr->id = %s", curr->id);\r
 638     NS_LOG_V(DEBUG, "curr->topicName = %s", curr->topicName);\r
 639 \r
 640     if( (strncmp(curr->id, cId, NS_UUID_STRING_SIZE) == 0) && (strcmp(curr->topicName, topicName) == 0) )\r
 641     {\r
 642         if (del == conTopicList->head) // first object\r
 643         {\r
 644             if (del == conTopicList->tail) // first object (one object)\r
 645             {\r
 646                 conTopicList->tail = del->next;\r
 647             }\r
 648 \r
 649             conTopicList->head = del->next;\r
 650             NSProviderDeleteCacheData(type, del->data);\r
 651             OICFree(del);\r
 652             pthread_mutex_unlock(&NSCacheMutex);\r
 653             return NS_OK;\r
 654         }\r
 655     }\r
 656 \r
 657     curr = NULL;\r
 658     del = del->next;\r
 659     while (del)\r
 660     {\r
 661         curr = (NSCacheTopicSubData *) del->data;\r
 662         if( (strncmp(curr->id, cId, NS_UUID_STRING_SIZE) == 0) && (strcmp(curr->topicName, topicName) == 0) )\r
 663         {\r
 664             if (del == conTopicList->tail) // delete object same to last object\r
 665             {\r
 666                 conTopicList->tail = prev;\r
 667             }\r
 668 \r
 669             prev->next = del->next;\r
 670             NSProviderDeleteCacheData(type, del->data);\r
 671             OICFree(del);\r
 672             pthread_mutex_unlock(&NSCacheMutex);\r
 673             return NS_OK;\r
 674         }\r
 675 \r
 676         prev = del;\r
 677         del = del->next;\r
 678     }\r
 679     pthread_mutex_unlock(&NSCacheMutex);\r
 680     return NS_FAIL;\r
 681 }\r