agent/download-agent-utils-dl-id-history.c

   1 /*
   2  * Copyright (c) 2012 Samsung Electronics Co., Ltd All Rights Reserved
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the License);
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an AS IS BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include "download-agent-type.h"
  18 #include "download-agent-utils.h"
  19 #include "download-agent-utils-dl-id-history.h"
  20
  21 da_result_t init_dl_id_history(dl_id_history_t *dl_id_history)
  22 {
  23         da_result_t ret = DA_RESULT_OK;
  24
  25         /* Initial dl_id_history will be starting number for dl_id.
  26          * dl_id will be sequentially increased from the dl_id_history,
  27          * then dl_id_history will be updated. */
  28         _da_thread_mutex_init(&(dl_id_history->mutex), DA_NULL);
  29         _da_thread_mutex_lock(&(dl_id_history->mutex));
  30         get_random_number(&(dl_id_history->starting_num));
  31         dl_id_history->cur_dl_id = DA_INVALID_ID;
  32         _da_thread_mutex_unlock(&(dl_id_history->mutex));
  33
  34         DA_LOG_CRITICAL(Default,"starting num = %d", dl_id_history->starting_num);
  35         return ret;
  36 }
  37
  38 da_result_t deinit_dl_id_history(dl_id_history_t *dl_id_history)
  39 {
  40         da_result_t ret = DA_RESULT_OK;
  41
  42         _da_thread_mutex_lock(&(dl_id_history->mutex));
  43         dl_id_history->starting_num = DA_INVALID_ID;
  44         dl_id_history->cur_dl_id = DA_INVALID_ID;
  45         _da_thread_mutex_unlock(&(dl_id_history->mutex));
  46
  47         _da_thread_mutex_destroy(&(dl_id_history->mutex));
  48
  49         return ret;
  50 }
  51
  52 int get_available_dl_id(dl_id_history_t *dl_id_history)
  53 {
  54         int dl_id = 0;
  55
  56         _da_thread_mutex_lock(&(dl_id_history->mutex));
  57
  58         if (dl_id_history->cur_dl_id == DA_INVALID_ID)
  59                 dl_id_history->cur_dl_id = dl_id_history->starting_num;
  60         else if (dl_id_history->cur_dl_id > 254)
  61                 dl_id_history->cur_dl_id = 1;
  62         else
  63                 dl_id_history->cur_dl_id++;
  64
  65         dl_id = dl_id_history->cur_dl_id;
  66
  67         _da_thread_mutex_unlock(&(dl_id_history->mutex));
  68
  69         DA_LOG_CRITICAL(Default,"dl_id = %d", dl_id);
  70         return dl_id;
  71 }