email-ipc/email-stub/email-stub-queue.c

   1 /*
   2 *  email-service
   3 *
   4 * Copyright (c) 2000 - 2011 Samsung Electronics Co., Ltd. All rights reserved.
   5 *
   6 * Contact: Kyuho Jo <kyuho.jo@samsung.com>, Sunghyun Kwon <sh0701.kwon@samsung.com>
   7 *
   8 * Licensed under the Apache License, Version 2.0 (the "License");
   9 * you may not use this file except in compliance with the License.
  10 * You may obtain a copy of the License at
  11 *
  12 * http://www.apache.org/licenses/LICENSE-2.0
  13 *
  14 * Unless required by applicable law or agreed to in writing, software
  15 * distributed under the License is distributed on an "AS IS" BASIS,
  16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  17 * See the License for the specific language governing permissions and
  18 * limitations under the License.
  19 *
  20 */
  21
  22
  23 #include <stdio.h>
  24 #include <malloc.h>
  25
  26 #include "email-stub-queue.h"
  27 #include "email-ipc-build.h"
  28
  29 #include "email-debug-log.h"
  30
  31 static emipc_email_queue_item *head = NULL;
  32 static emipc_email_queue_item *tail = NULL;
  33 int count = 0;
  34
  35 EXPORT_API void *emipc_pop_in_queue()
  36 {
  37         void *data = NULL;
  38
  39         if (head) {
  40                 emipc_email_queue_item *popped = head;
  41                 data = popped->data;
  42
  43                 if (popped->next) {
  44                         head = popped->next;
  45                 } else {
  46                         head = tail = NULL;
  47                 }
  48
  49                 EM_SAFE_FREE(popped);
  50                 count = (count <= 0) ? 0 : count-1;
  51
  52                 return data;
  53         }
  54         return NULL;
  55 }
  56
  57 EXPORT_API bool emipc_push_in_queue(void *data)
  58 {
  59         emipc_email_queue_item *item = NULL;
  60         if (!data) {
  61                 EM_DEBUG_EXCEPTION("[IPCLib] emipc_push_in_queue - invalid input\n");
  62                 return false;
  63         }
  64
  65         item = (emipc_email_queue_item *)malloc(sizeof(emipc_email_queue_item));
  66         if (item == NULL) {
  67                 EM_DEBUG_EXCEPTION("Malloc failed.");
  68                 return false;
  69         }
  70         memset(item, 0x00, sizeof(emipc_email_queue_item));
  71
  72         item->data = data;
  73         item->next = NULL;
  74         if (tail) {
  75                 tail->next = item;
  76                 tail = item;
  77         } else {
  78                 head = tail = item;
  79         }
  80
  81         count++;
  82
  83         return true;
  84 }
  85
  86 EXPORT_API int emipc_get_count_of_item()
  87 {
  88         return count;
  89 }