Added RefCounted helpers

GlitchyEngine/src/Helper.bf

@@ -0,0 +1,23 @@
+using System;
+using DirectX.Common;
+
+namespace GlitchyEngine
+{
+	static
+	{
+		/// Releases the reference to destination, writes newValue into it and adds a reference to newValue.
+		public static mixin SetReference<T>(T destination, T newValue) where T: RefCounted
+		{
+			destination?.ReleaseRef();
+			destination = newValue;
+			destination?.AddRef();
+		}
+
+		/// Releases the reference to value and nullifies it.
+		public static mixin ReleaseRefAndNullify<T>(T value) where T: RefCounted
+		{
+			value?.ReleaseRef();
+			value = null;
+		}
+	}
+}