src/Tizen.NUI/src/public/Common/BaseHandle.cs

   1 /*
   2  * Copyright(c) 2021 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 using System;
  18 using System.ComponentModel;
  19 using System.Runtime.CompilerServices;
  20 using Tizen.NUI.Binding;
  21
  22 namespace Tizen.NUI
  23 {
  24     /// <summary>
  25     /// BaseHandle is a handle to an internal Dali resource.
  26     /// </summary>
  27     /// <since_tizen> 3 </since_tizen>
  28     public class BaseHandle : Element, global::System.IDisposable
  29     {
  30         /// <summary>
  31         /// swigCMemOwn
  32         /// </summary>
  33         /// <since_tizen> 3 </since_tizen>
  34         [Obsolete("Deprecated in API9, Will be removed in API11, Please use SwigCMemOwn")]
  35         [System.Diagnostics.CodeAnalysis.SuppressMessage("Design", "CA1051:Do not declare visible instance fields", Justification = "<Pending>")]
  36         protected bool swigCMemOwn;
  37
  38         /// <summary>
  39         /// A flag to check if it is already disposed.
  40         /// </summary>
  41         /// <since_tizen> 3 </since_tizen>
  42         [Obsolete("Deprecated in API9, Will be removed in API11, Please use Disposed")]
  43         [System.Diagnostics.CodeAnalysis.SuppressMessage("Design", "CA1051:Do not declare visible instance fields", Justification = "<Pending>")]
  44         protected bool disposed = false;
  45
  46         private global::System.Runtime.InteropServices.HandleRef swigCPtr;
  47         private global::System.Runtime.InteropServices.HandleRef swigCPtrCopy;
  48         private bool registerMe;
  49
  50         //A Flag to check who called Dispose(). (By User or DisposeQueue)
  51         private bool isDisposeQueued = false;
  52
  53 #if NUI_DEBUG_ON
  54         private static int debuggingCount = 0;
  55 #endif
  56
  57         /// <summary>
  58         /// Create an instance of BaseHandle.
  59         /// </summary>
  60         /// <since_tizen> 3 </since_tizen>
  61         public BaseHandle() : this(Interop.BaseHandle.NewBaseHandle())
  62         {
  63             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
  64         }
  65
  66         /// <summary>
  67         /// Create an instance of BaseHandle.
  68         /// </summary>
  69         /// <param name="handle">The BaseHandle instance.</param>
  70         /// <since_tizen> 3 </since_tizen>
  71         public BaseHandle(BaseHandle handle) : this(Interop.BaseHandle.NewBaseHandle(BaseHandle.getCPtr(handle)))
  72         {
  73             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
  74         }
  75
  76         internal BaseHandle(global::System.IntPtr cPtr, bool cMemoryOwn)
  77         {
  78             //to catch derived classes dali native exceptions
  79             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
  80
  81             NUILog.Debug($"[Dispose] BaseHandle.contructor with cMemeryOwn:{cMemoryOwn} START");
  82
  83             registerMe = swigCMemOwn = cMemoryOwn;
  84             swigCPtr = new global::System.Runtime.InteropServices.HandleRef(this, cPtr);
  85             // using copy constructor to create another native handle so Registry.Unregister works fine.
  86             swigCPtrCopy = new global::System.Runtime.InteropServices.HandleRef(this, Interop.BaseHandle.NewBaseHandle(swigCPtr));
  87             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
  88
  89             if (registerMe)
  90             {
  91                 // Register this instance of BaseHandle in the registry.
  92                 Registry.Register(this);
  93             }
  94
  95 #if NUI_DEBUG_ON
  96             NUILog.Debug($"[Dispose] type:{GetType()} copyNativeHandle:{swigCPtrCopy.Handle.ToString("X8")}");
  97
  98             debuggingCount++;
  99             if (this is BaseComponents.View view)
 100             {
 101                 NUILog.Debug($"[Dispose] ID:{view.ID} Name:{view.Name} debuggingCount:{debuggingCount}");
 102             }
 103             NUILog.Debug($"[Dispose] BaseHandle.contructor with cMemeryOwn END");
 104             NUILog.Debug($"=============================");
 105 #endif
 106         }
 107
 108         internal BaseHandle(global::System.IntPtr cPtr)
 109         {
 110             NUILog.Debug($"[Dispose] BaseHandle.contructor START");
 111
 112             registerMe = swigCMemOwn = true;
 113
 114             swigCPtr = new global::System.Runtime.InteropServices.HandleRef(this, cPtr);
 115
 116             // using copy constructor to create another native handle so Registry.Unregister works fine.
 117             swigCPtrCopy = new global::System.Runtime.InteropServices.HandleRef(this, Interop.BaseHandle.NewBaseHandle(SwigCPtr));
 118             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 119
 120             if (registerMe)
 121             {
 122                 // Register this instance of BaseHandle in the registry.
 123                 Registry.Register(this);
 124             }
 125
 126 #if NUI_DEBUG_ON
 127             NUILog.Debug($"[Dispose] type:{GetType()} copyNativeHandle:{swigCPtrCopy.Handle.ToString("X8")}");
 128
 129             debuggingCount++;
 130             if (this is BaseComponents.View view)
 131             {
 132                 NUILog.Debug($"[Dispose] ID:{view.ID} Name:{view.Name} debuggingCount:{debuggingCount}");
 133             }
 134             NUILog.Debug($"[Dispose] BaseHandle.contructor END");
 135             NUILog.Debug($"=============================");
 136 #endif
 137
 138         }
 139
 140         /// <summary>
 141         /// Dispose.
 142         /// </summary>
 143         /// <since_tizen> 3 </since_tizen>
 144         // following this guide: https://docs.microsoft.com/ko-kr/dotnet/fundamentals/code-analysis/quality-rules/ca1063?view=vs-2019 (CA1063)
 145         ~BaseHandle() => Dispose(false);
 146
 147         /// <summary>
 148         /// Event when a property is set.
 149         /// </summary>
 150         /// <since_tizen> 5 </since_tizen>
 151         /// <seealso cref="BindableObject.PropertyChanged"/>
 152         [Obsolete("Deprecated in API9, Will be removed in API11, Please use BindableObject.PropertyChanged instead!")]
 153         public event PropertyChangedEventHandler PropertySet;
 154
 155         internal global::System.Runtime.InteropServices.HandleRef GetBaseHandleCPtrHandleRef
 156         {
 157             get
 158             {
 159                 return swigCPtrCopy;
 160             }
 161         }
 162
 163         /// <summary>
 164         /// Returns the bool value true to indicate that an operand is true and returns false otherwise.
 165         /// </summary>
 166         /// <since_tizen> 3 </since_tizen>
 167         public static bool operator true(BaseHandle handle)
 168         {
 169             // if the C# object is null, return false
 170             if (BaseHandle.ReferenceEquals(handle, null))
 171             {
 172                 return false;
 173             }
 174             // returns true if the handle has a body, false otherwise
 175             return handle.HasBody();
 176         }
 177
 178         /// <summary>
 179         /// Returns the bool false  to indicate that an operand is false and returns true otherwise.
 180         /// </summary>
 181         /// <since_tizen> 3 </since_tizen>
 182         public static bool operator false(BaseHandle handle)
 183         {
 184             // if the C# object is null, return true
 185             if (BaseHandle.ReferenceEquals(handle, null))
 186             {
 187                 return true;
 188             }
 189             return !handle.HasBody();
 190         }
 191
 192         /// <summary>
 193         /// Explicit conversion from Handle to bool.
 194         /// </summary>
 195         /// <since_tizen> 3 </since_tizen>
 196         public static explicit operator bool(BaseHandle handle)
 197         {
 198             // if the C# object is null, return false
 199             if (BaseHandle.ReferenceEquals(handle, null))
 200             {
 201                 return false;
 202             }
 203             // returns true if the handle has a body, false otherwise
 204             return handle.HasBody();
 205         }
 206
 207         /// <summary>
 208         /// Equality operator
 209         /// </summary>
 210         /// <since_tizen> 3 </since_tizen>
 211         public static bool operator ==(BaseHandle x, BaseHandle y)
 212         {
 213             // if the C# objects are the same return true
 214             if (BaseHandle.ReferenceEquals(x, y))
 215             {
 216                 return true;
 217             }
 218             if (!BaseHandle.ReferenceEquals(x, null) && !BaseHandle.ReferenceEquals(y, null))
 219             {
 220                 // drop into native code to see if both handles point to the same body
 221                 return x.IsEqual(y);
 222             }
 223
 224             if (BaseHandle.ReferenceEquals(x, null) && !BaseHandle.ReferenceEquals(y, null))
 225             {
 226                 if (y.HasBody()) return false;
 227                 else return true;
 228             }
 229             if (!BaseHandle.ReferenceEquals(x, null) && BaseHandle.ReferenceEquals(y, null))
 230             {
 231                 if (x.HasBody()) return false;
 232                 else return true;
 233             }
 234
 235             return false;
 236         }
 237
 238         /// <summary>
 239         /// Inequality operator. Returns Null if either operand is Null
 240         /// </summary>
 241         /// <since_tizen> 3 </since_tizen>
 242         public static bool operator !=(BaseHandle x, BaseHandle y)
 243         {
 244             return !(x == y);
 245         }
 246
 247         /// <summary>
 248         /// Logical AND operator.<br />
 249         /// It's possible when doing a  operator this function (opBitwiseAnd) is never called due to short circuiting.<br />
 250         /// </summary>
 251         /// <since_tizen> 3 </since_tizen>
 252         public static BaseHandle operator &(BaseHandle x, BaseHandle y)
 253         {
 254             if (x == y)
 255             {
 256                 return x;
 257             }
 258             return null;
 259         }
 260
 261         /// <summary>
 262         /// Logical OR operator for ||.<br />
 263         /// It's possible when doing a || this function (opBitwiseOr) is never called due to short circuiting.<br />
 264         /// </summary>
 265         /// <since_tizen> 3 </since_tizen>
 266         public static BaseHandle operator |(BaseHandle x, BaseHandle y)
 267         {
 268             if (!BaseHandle.ReferenceEquals(x, null) || !BaseHandle.ReferenceEquals(y, null))
 269             {
 270                 if (x != null && x.HasBody())
 271                 {
 272                     return x;
 273                 }
 274                 if (y != null && y.HasBody())
 275                 {
 276                     return y;
 277                 }
 278                 return null;
 279             }
 280             return null;
 281         }
 282
 283         /// <summary>
 284         /// Logical ! operator
 285         /// </summary>
 286         /// <since_tizen> 3 </since_tizen>
 287         public static bool operator !(BaseHandle x)
 288         {
 289             // if the C# object is null, return true
 290             if (BaseHandle.ReferenceEquals(x, null))
 291             {
 292                 return true;
 293             }
 294             if (x.HasBody())
 295             {
 296                 return false;
 297             }
 298             return true;
 299         }
 300
 301         /// <summary>
 302         /// Equals
 303         /// </summary>
 304         /// <param name="o">The object should be compared.</param>
 305         /// <returns>True if equal.</returns>
 306         /// <since_tizen> 5 </since_tizen>
 307         public override bool Equals(object o)
 308         {
 309             return base.Equals(o);
 310         }
 311
 312         /// <summary>
 313         /// Gets the hash code of this baseHandle.
 314         /// </summary>
 315         /// <returns>The hash code.</returns>
 316         /// <since_tizen> 5 </since_tizen>
 317         public override int GetHashCode()
 318         {
 319             return base.GetHashCode();
 320         }
 321
 322         /// <summary>
 323         /// Dispose.
 324         /// </summary>
 325         /// <since_tizen> 3 </since_tizen>
 326         public void Dispose()
 327         {
 328             if (isDisposeQueued)
 329             {
 330                 Dispose(DisposeTypes.Implicit);
 331             }
 332             else
 333             {
 334                 Dispose(true);
 335             }
 336             GC.SuppressFinalize(this);
 337         }
 338
 339         /// <summary>
 340         /// Hidden API (Inhouse API).
 341         /// Dispose.
 342         /// </summary>
 343         /// <remarks>
 344         /// Following the guide of https://docs.microsoft.com/en-us/dotnet/standard/garbage-collection/implementing-dispose.
 345         /// This will replace "protected virtual void Dispose(DisposeTypes type)" which is exactly same in functionality.
 346         /// </remarks>
 347         /// <param name="disposing">true in order to free managed objects</param>
 348         // Protected implementation of Dispose pattern.
 349         [EditorBrowsable(EditorBrowsableState.Never)]
 350         protected virtual void Dispose(bool disposing)
 351         {
 352             if (disposed)
 353             {
 354                 return;
 355             }
 356
 357             if (disposing)
 358             {
 359                 // TODO: dispose managed state (managed objects).
 360                 // Explicit call. user calls Dispose()
 361
 362                 //Throw exception if Dispose() is called in separate thread.
 363                 if (!Window.IsInstalled())
 364                 {
 365                     var process = global::System.Diagnostics.Process.GetCurrentProcess().Id;
 366                     var thread = global::System.Threading.Thread.CurrentThread.ManagedThreadId;
 367                     var me = this.GetType().FullName;
 368
 369                     throw new global::System.InvalidOperationException("This API called from separate thread. This API must be called from MainThread. \n" +
 370                         $" process:{process} thread:{thread}, disposing:{disposing}, isDisposed:{this.disposed}, isDisposeQueued:{this.isDisposeQueued}, me:{me}\n");
 371                 }
 372
 373                 if (isDisposeQueued)
 374                 {
 375                     Tizen.Log.Fatal("NUI", $"should not be here! (dead code) this will be removed!");
 376                     throw new global::System.Exception($"[NUI] should not be here! (dead code) this will be removed!");
 377                     Dispose(DisposeTypes.Implicit);
 378                 }
 379                 else
 380                 {
 381                     Dispose(DisposeTypes.Explicit);
 382                 }
 383             }
 384             else
 385             {
 386                 // Implicit call. user doesn't call Dispose(), so this object is added into DisposeQueue to be disposed automatically.
 387                 if (!isDisposeQueued)
 388                 {
 389                     isDisposeQueued = true;
 390                     DisposeQueue.Instance.Add(this);
 391                 }
 392             }
 393
 394             // TODO: free unmanaged resources (unmanaged objects) and override a finalizer below.
 395             // TODO: set large fields to null.
 396         }
 397
 398
 399         /// <summary>
 400         /// Performs an action on this object with the given action name and attributes.
 401         /// </summary>
 402         /// <param name="actionName">The command for the action.</param>
 403         /// <param name="attributes">The list of attributes for the action.</param>
 404         /// <returns>The action is performed by the object or not.</returns>
 405         /// <since_tizen> 3 </since_tizen>
 406         public bool DoAction(string actionName, PropertyMap attributes)
 407         {
 408             bool ret = Interop.BaseHandle.DoAction(swigCPtrCopy, actionName, PropertyMap.getCPtr(attributes));
 409             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 410             return ret;
 411         }
 412
 413         /// <summary>
 414         /// Returns the type name for the Handle.<br />
 415         /// Will return an empty string if the typename does not exist. This will happen for types that
 416         /// have not registered with type-registry.
 417         /// </summary>
 418         /// <returns>The type name. Empty string if the typename does not exist.</returns>
 419         /// <since_tizen> 3 </since_tizen>
 420         public string GetTypeName()
 421         {
 422             string ret = Interop.BaseHandle.GetTypeName(swigCPtrCopy);
 423             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 424             return ret;
 425         }
 426
 427         /// <summary>
 428         /// Returns the type info for the Handle.<br />
 429         /// </summary>
 430         /// <param name="info">The type information.</param>
 431         /// <returns>True If get the type info.</returns>
 432         /// <since_tizen> 3 </since_tizen>
 433         public bool GetTypeInfo(Tizen.NUI.TypeInfo info)
 434         {
 435             bool ret = Interop.BaseHandle.GetTypeInfo(swigCPtrCopy, Tizen.NUI.TypeInfo.getCPtr(info));
 436             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 437             return ret;
 438         }
 439
 440         /// <summary>
 441         /// Resets the handle.
 442         /// </summary>
 443         /// <since_tizen> 3 </since_tizen>
 444         public void Reset()
 445         {
 446             Interop.BaseHandle.Reset(swigCPtrCopy);
 447             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 448         }
 449
 450         /// <summary>
 451         /// To check the BaseHandle instance is equal or not.
 452         /// </summary>
 453         /// <param name="rhs">The baseHandle instance.</param>
 454         /// <returns>True If equal.</returns>
 455         /// <since_tizen> 3 </since_tizen>
 456         public bool EqualTo(BaseHandle rhs)
 457         {
 458             bool ret = Interop.BaseHandle.EqualTo(swigCPtrCopy, BaseHandle.getCPtr(rhs));
 459             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 460             return ret;
 461         }
 462
 463         /// <summary>
 464         /// To check the BaseHandle instance is equal or not.
 465         /// </summary>
 466         /// <param name="rhs">The baseHandle instance.</param>
 467         /// <returns>True If not equal.</returns>
 468         /// <since_tizen> 3 </since_tizen>
 469         public bool NotEqualTo(BaseHandle rhs)
 470         {
 471             bool ret = Interop.BaseHandle.NotEqualTo(swigCPtrCopy, BaseHandle.getCPtr(rhs));
 472             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 473             return ret;
 474         }
 475
 476         /// <summary>
 477         /// To check the BaseHandle instance has body or not.
 478         /// </summary>
 479         /// <returns>True If the baseHandle instance has body.</returns>
 480         /// <since_tizen> 3 </since_tizen>
 481         public bool HasBody()
 482         {
 483             if (swigCPtrCopy.Handle == IntPtr.Zero)
 484             {
 485                 return false;
 486             }
 487
 488             if (disposed == true)
 489             {
 490                 return false;
 491             }
 492             bool ret = Interop.BaseHandle.HasBody(swigCPtrCopy);
 493             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 494             return ret;
 495         }
 496
 497         /// <summary>
 498         /// To check the BaseHandle instance is equal or not.
 499         /// </summary>
 500         /// <param name="rhs">The baseHandle instance.</param>
 501         /// <returns>True If equal.</returns>
 502         /// <since_tizen> 3 </since_tizen>
 503         public bool IsEqual(BaseHandle rhs)
 504         {
 505             if (disposed == true)
 506             {
 507                 return false;
 508             }
 509
 510             bool ret = Interop.BaseHandle.IsEqual(swigCPtrCopy, BaseHandle.getCPtr(rhs));
 511             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 512             return ret;
 513         }
 514
 515         internal static global::System.Runtime.InteropServices.HandleRef getCPtr(BaseHandle obj)
 516         {
 517             return (obj == null) ? new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero) : obj.swigCPtrCopy;
 518         }
 519
 520         internal void NotifyPropertyChanged([CallerMemberName] String propertyName = "")
 521         {
 522             PropertySet?.Invoke(this, new PropertyChangedEventArgs(propertyName));
 523         }
 524
 525         /// <summary>
 526         /// Dispose.
 527         /// </summary>
 528         /// <since_tizen> 3 </since_tizen>
 529         protected virtual void Dispose(DisposeTypes type)
 530         {
 531             if (disposed)
 532             {
 533                 return;
 534             }
 535
 536             NUILog.Debug($"[Dispose] BaseHandle.Dispose({type}) START");
 537
 538             if (type == DisposeTypes.Explicit)
 539             {
 540                 //Called by User
 541                 //Release your own managed resources here.
 542                 //You should release all of your own disposable objects here.
 543
 544             }
 545
 546             //Release your own unmanaged resources here.
 547             //You should not access any managed member here except static instance.
 548             //because the execution order of Finalizes is non-deterministic.
 549
 550             //Unreference this instance from Registry.
 551             if (registerMe)
 552             {
 553                 Registry.Unregister(this);
 554             }
 555
 556 #if NUI_DEBUG_ON
 557             debuggingCount--;
 558             NUILog.Debug($"[Dispose] swigCMemOwn:{swigCMemOwn} debuggingCount:{debuggingCount} type:{GetType()} copyNativeHandle:{swigCPtrCopy.Handle.ToString("X8")}");
 559 #endif
 560
 561             if (SwigCPtr.Handle != IntPtr.Zero)
 562             {
 563                 if (swigCMemOwn)
 564                 {
 565                     swigCMemOwn = false;
 566                     ReleaseSwigCPtr(SwigCPtr);
 567                 }
 568                 swigCPtr = new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero);
 569             }
 570             if (swigCPtrCopy.Handle != global::System.IntPtr.Zero)
 571             {
 572                 swigCMemOwn = false;
 573                 Interop.BaseHandle.DeleteBaseHandle(swigCPtrCopy);
 574                 swigCPtrCopy = new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero);
 575             }
 576
 577             disposed = true;
 578
 579             if (null != Application.Current)
 580             {
 581                 Application.Current.XamlResourceChanged -= OnResourcesChanged;
 582             }
 583
 584             NUILog.Debug($"[Dispose] BaseHandle.Dispose({type}) END");
 585             NUILog.Debug($"=============================");
 586         }
 587
 588         /// <summary>
 589         /// Release swigCPtr.
 590         /// </summary>
 591         /// <since_tizen> 6 </since_tizen>
 592         /// This will not be public opened.
 593         [EditorBrowsable(EditorBrowsableState.Never)]
 594         protected virtual void ReleaseSwigCPtr(System.Runtime.InteropServices.HandleRef swigCPtr)
 595         {
 596         }
 597
 598         /// <summary>
 599         /// Contains event arguments for the FocusChangeRequested event.
 600         /// </summary>
 601         [Obsolete("Deprecated in API9; Will be removed in API11.")]
 602         public class FocusRequestArgs : EventArgs
 603         {
 604
 605             /// <summary>
 606             /// Gets or sets a value that indicates the starting focus state of the element for which a focus change is requested.
 607             /// </summary>
 608             public bool Focus { get; set; }
 609
 610             /// <summary>
 611             /// Gets or sets a value that indicates the ending focus state of the element for which a focus change is requested.
 612             /// </summary>
 613             public bool Result { get; set; }
 614         }
 615
 616         internal global::System.Runtime.InteropServices.HandleRef SwigCPtr
 617         {
 618             get
 619             {
 620                 if (swigCPtr.Handle == IntPtr.Zero)
 621                 {
 622                     var process = global::System.Diagnostics.Process.GetCurrentProcess().Id;
 623                     var thread = global::System.Threading.Thread.CurrentThread.ManagedThreadId;
 624                     var me = this.GetType().FullName;
 625
 626                     throw new ObjectDisposedException(nameof(SwigCPtr), $"Error! NUI's native dali object is already disposed. " +
 627                         $"OR the native dali object handle of NUI becomes null! \n" +
 628                         $" process:{process} thread:{thread}, isDisposed:{this.disposed}, isDisposeQueued:{this.isDisposeQueued}, me:{me}\n");
 629                 }
 630                 return swigCPtr;
 631             }
 632         }
 633
 634         internal bool IsNativeHandleInvalid()
 635         {
 636             return swigCPtr.Handle == IntPtr.Zero;
 637         }
 638
 639         /// <summary>
 640         /// swigCMemOwn
 641         /// </summary>
 642         [EditorBrowsable(EditorBrowsableState.Never)]
 643         protected internal bool SwigCMemOwn => swigCMemOwn;
 644
 645         /// <summary>
 646         /// A flag to check if it is already disposed.
 647         /// </summary>
 648         [EditorBrowsable(EditorBrowsableState.Never)]
 649         protected internal bool Disposed => disposed;
 650
 651         /// <summary>
 652         /// A flag to check if it is disposed by DisposeQueue.
 653         /// </summary>
 654         [EditorBrowsable(EditorBrowsableState.Never)]
 655         protected internal bool IsDisposeQueued => isDisposeQueued;
 656
 657     }
 658 }