src/Tizen.Network.Smartcard/Tizen.Network.Smartcard/SmartcardManagerImpl.cs

   1 /*
   2  * Copyright (c) 2016 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 using System;
  18 using System.Collections.Generic;
  19 using System.Runtime.InteropServices;
  20 using System.Threading.Tasks;
  21
  22 namespace Tizen.Network.Smartcard
  23 {
  24     static internal class Globals
  25     {
  26         internal const string LogTag = "Tizen.Network.Smartcard";
  27     }
  28
  29     internal class SmartcardManagerImpl : IDisposable
  30     {
  31         private static readonly SmartcardManagerImpl _instance = new SmartcardManagerImpl();
  32         private List<SmartcardReader> _readerList = new List<SmartcardReader>();
  33         private bool disposed = false;
  34
  35         internal static SmartcardManagerImpl Instance
  36         {
  37             get
  38             {
  39                 return _instance;
  40             }
  41         }
  42
  43         private SmartcardManagerImpl()
  44         {
  45             initialize();
  46         }
  47
  48         ~SmartcardManagerImpl()
  49         {
  50             Dispose(false);
  51         }
  52
  53         public void Dispose()
  54         {
  55             Dispose(true);
  56             GC.SuppressFinalize(this);
  57         }
  58
  59         private void Dispose(bool disposing)
  60         {
  61             if (disposed)
  62                 return;
  63
  64             if (disposing)
  65             {
  66                 // Free managed objects.
  67                 foreach (SmartcardReader reader in _readerList)
  68                 {
  69                     reader.Dispose();
  70                     _readerList.Remove(reader);
  71                 }
  72             }
  73             //Free unmanaged objects
  74             deinitialize();
  75             disposed = true;
  76         }
  77
  78         private void initialize()
  79         {
  80             int ret = Interop.Smartcard.Initialize();
  81             if (ret != (int)SmartcardError.None)
  82             {
  83                 Log.Error(Globals.LogTag, "Failed to initialize smartcard, Error - " + (SmartcardError)ret);
  84                 SmartcardErrorFactory.ThrowSmartcardException(ret);
  85             }
  86         }
  87
  88         private void deinitialize()
  89         {
  90             int ret = Interop.Smartcard.Deinitialize();
  91             if (ret != (int)SmartcardError.None)
  92             {
  93                 Log.Error(Globals.LogTag, "Failed to deinitialize smartcard, Error - " + (SmartcardError)ret);
  94             }
  95         }
  96
  97         internal IEnumerable<SmartcardReader> GetReaders()
  98         {
  99             IntPtr readerPtr;
 100             int len = 0;
 101
 102             int ret = Interop.Smartcard.GetReaders(out readerPtr, out len);
 103             if (ret != (int)SmartcardError.None)
 104             {
 105                 Log.Error(Globals.LogTag, "Failed to remove with AP, Error - " + (SmartcardError)ret);
 106                 SmartcardErrorFactory.ThrowSmartcardException(ret);
 107             }
 108
 109             for (int i = 0; i < len; i++)
 110             {
 111                 int readerID = Marshal.ReadInt32(readerPtr);
 112
 113                 SmartcardReader readerItem = new SmartcardReader(readerID);
 114                 _readerList.Add(readerItem);
 115                 readerPtr += sizeof(int);
 116             }
 117
 118             return _readerList;
 119         }
 120     }
 121 }