internal static void RegisterHandle()

in binding/SkiaSharp/HandleDictionary.cs [135:171]

• 28 lines of code
• 8 McCabe index (conditional complexity)

		internal static void RegisterHandle (IntPtr handle, SKObject instance)
		{
			if (handle == IntPtr.Zero || instance == null)
				return;

			if (instance is ISKSkipObjectRegistration)
				return;

			SKObject objectToDispose = null;

			instancesLock.EnterWriteLock ();
			try {
				if (instances.TryGetValue (handle, out var oldValue) && oldValue.Target is SKObject obj && !obj.IsDisposed) {
#if THROW_OBJECT_EXCEPTIONS
					if (obj.OwnsHandle) {
						// a mostly recoverable error
						// if there is a managed object, then maybe something happened and the native object is dead
						throw new InvalidOperationException (
							$"A managed object already exists for the specified native object. " +
							$"H: {handle.ToString ("x")} Type: ({obj.GetType ()}, {instance.GetType ()})");
					}
#endif
					// this means the ownership was handed off to a native object, so clean up the managed side
					objectToDispose = obj;
				}

				instances[handle] = new WeakReference (instance);
#if DEBUG
				stackTraces[handle] = Environment.StackTrace;
#endif
			} finally {
				instancesLock.ExitWriteLock ();
			}

			// dispose the object we just replaced
			objectToDispose?.DisposeInternal ();
		}