src/Tizen.NUI/src/internal/EventThreadCallback.cs

   1 /*
   2  * Copyright (c) 2017 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
  18 namespace Tizen.NUI
  19 {
  20
  21     internal class EventThreadCallback : global::System.IDisposable
  22     {
  23         private global::System.Runtime.InteropServices.HandleRef swigCPtr;
  24         protected bool swigCMemOwn;
  25         /// <since_tizen> 3 </since_tizen>
  26         public delegate void CallbackDelegate();
  27
  28         internal EventThreadCallback(global::System.IntPtr cPtr, bool cMemoryOwn)
  29         {
  30             swigCMemOwn = cMemoryOwn;
  31             swigCPtr = new global::System.Runtime.InteropServices.HandleRef(this, cPtr);
  32         }
  33
  34         internal static global::System.Runtime.InteropServices.HandleRef getCPtr(EventThreadCallback obj)
  35         {
  36             return (obj == null) ? new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero) : obj.swigCPtr;
  37         }
  38
  39         //A Flag to check who called Dispose(). (By User or DisposeQueue)
  40         private bool isDisposeQueued = false;
  41         //A Flat to check if it is already disposed.
  42         protected bool disposed = false;
  43
  44
  45         ~EventThreadCallback()
  46         {
  47             //if (!isDisposeQueued)
  48             //{
  49                 //isDisposeQueued = true;
  50                 //DisposeQueue.Instance.Add(this);
  51             //}
  52         }
  53
  54         public void Dispose()
  55         {
  56             //Throw excpetion if Dispose() is called in separate thread.
  57             if (!Window.IsInstalled())
  58             {
  59                 throw new System.InvalidOperationException("This API called from separate thread. This API must be called from MainThread.");
  60             }
  61
  62             if (isDisposeQueued)
  63             {
  64                 Dispose(DisposeTypes.Implicit);
  65             }
  66             else
  67             {
  68                 Dispose(DisposeTypes.Explicit);
  69                 System.GC.SuppressFinalize(this);
  70             }
  71         }
  72
  73         protected virtual void Dispose(DisposeTypes type)
  74         {
  75             if (disposed)
  76             {
  77                 return;
  78             }
  79
  80             if (type == DisposeTypes.Explicit)
  81             {
  82                 //Called by User
  83                 //Release your own managed resources here.
  84                 //You should release all of your own disposable objects here.
  85
  86             }
  87
  88             //Release your own unmanaged resources here.
  89             //You should not access any managed member here except static instance.
  90             //because the execution order of Finalizes is non-deterministic.
  91
  92             if (swigCPtr.Handle != global::System.IntPtr.Zero)
  93             {
  94                 if (swigCMemOwn)
  95                 {
  96                     swigCMemOwn = false;
  97                     //NDalicManualPINVOKE.delete_EventThreadCallback(swigCPtr);
  98                 }
  99                 swigCPtr = new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero);
 100             }
 101
 102             disposed = true;
 103         }
 104
 105         public EventThreadCallback(CallbackDelegate func) : this(Interop.EventThreadCallback.new_EventThreadCallback(func), true)
 106         {
 107             if (NDalicPINVOKE.SWIGPendingException.Pending)
 108                 throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 109         }
 110
 111         public void Trigger()
 112         {
 113             if ((System.IntPtr)swigCPtr != global::System.IntPtr.Zero)
 114             {
 115                 Interop.EventThreadCallback.EventThreadCallback_Trigger(swigCPtr);
 116             }
 117
 118             if (NDalicPINVOKE.SWIGPendingException.Pending)
 119                 throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 120         }
 121     }
 122
 123 }