common/DispatcherHelper.cpp

   1 /*
   2 * Copyright (c) 2012, 2013 Samsung Electronics Co., Ltd.
   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 /* standard library header */
  18 #include <stdio.h>
  19 #include <string.h>
  20
  21 /* SLP library header */
  22
  23 /* local header */
  24 #include "Debug.h"
  25 #include "DispatcherHelper.h"
  26
  27 namespace smartcard_service_api
  28 {
  29         DispatcherHelper::DispatcherHelper()
  30         {
  31                 dispatcherThread = 0;
  32         }
  33
  34         DispatcherHelper::~DispatcherHelper()
  35         {
  36                 stopDispatcherThread();
  37         }
  38
  39         DispatcherMsg *DispatcherHelper::fetchMessage()
  40         {
  41                 DispatcherMsg *result = NULL;
  42
  43                 if (messageQ.size() > 0)
  44                 {
  45                         result = messageQ.front();
  46                         messageQ.pop();
  47                 }
  48
  49                 return result;
  50         }
  51
  52         void DispatcherHelper::clearQueue()
  53         {
  54                 DispatcherMsg *temp = NULL;
  55
  56                 while (messageQ.size() > 0)
  57                 {
  58                         temp = fetchMessage();
  59                         delete temp;
  60                 }
  61         }
  62
  63         void DispatcherHelper::pushMessage(DispatcherMsg *msg)
  64         {
  65                 DispatcherMsg *pushMsg = new DispatcherMsg(msg);
  66
  67                 syncLock();
  68
  69                 messageQ.push(pushMsg);
  70
  71                 signalCondition();
  72                 syncUnlock();
  73         }
  74
  75         void *DispatcherHelper::_dispatcherThreadFunc(void *data)
  76         {
  77                 int result = 0;
  78                 DispatcherMsg *msg = NULL;
  79                 DispatcherHelper *helper = (DispatcherHelper *)data;
  80
  81                 while (1)
  82                 {
  83                         helper->syncLock();
  84                         if ((msg = helper->fetchMessage()) == NULL)
  85                         {
  86                                 result = helper->waitTimedCondition(0);
  87                                 helper->syncUnlock();
  88                                 continue;
  89                         }
  90                         helper->syncUnlock();
  91
  92                         /* process message */
  93                         helper->dispatcherThreadFunc(msg, data);
  94
  95                         delete msg;
  96                 }
  97
  98                 return (void *)NULL;
  99         }
 100
 101         void DispatcherHelper::processMessage(DispatcherMsg *msg)
 102         {
 103                 dispatcherThreadFunc(msg, this);
 104         }
 105
 106         bool DispatcherHelper::runDispatcherThread()
 107         {
 108                 bool result = false;
 109                 pthread_attr_t attr;
 110
 111                 if (dispatcherThread == 0)
 112                 {
 113                         int ret;
 114
 115                         pthread_attr_init(&attr);
 116                         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 117
 118                         if ((ret = pthread_create(&dispatcherThread, &attr, &DispatcherHelper::_dispatcherThreadFunc, this)) != 0)
 119                         {
 120                                 SCARD_DEBUG_ERR("pthread_create failed [%d]", ret);
 121                         }
 122                         else
 123                         {
 124                                 SCARD_DEBUG("pthread_create success");
 125                                 result = true;
 126                         }
 127                 }
 128                 else
 129                 {
 130                         SCARD_DEBUG("thread already start");
 131                         result = true;
 132                 }
 133
 134                 return result;
 135         }
 136
 137         void DispatcherHelper::stopDispatcherThread()
 138         {
 139                 if (dispatcherThread != 0)
 140                 {
 141                         pthread_cancel(dispatcherThread);
 142                         dispatcherThread = 0;
 143                 }
 144         }
 145
 146 } /* namespace smartcard_service_api */